Technical Service Manual
RMX™ Series
▲
RMX 850
▲
RMX 1450
▲
RMX 2450
*TD-000078-00*
TD-000078-00
RMX Series
Technical Service Manual
RMX 850
RMX 1450
RMX 2450
QSC Audio Products, Inc.
Technical Services Group
Phone: 1-800 QSC AUDIO (1-800-772-2834) USA only
+1 (714) 957-7150
Fax:
+1 (714) 754-6173
Postal: 1665 MacArthur Blvd.
Costa Mesa, California 92626 USA
E-mail: tech_support@qscaudio.com
Web:
http://www.qscaudio.com (product information and support)
http://www.qscstore.com (parts and accessory sales)
Copyright 2001 QSC Audio Products, Inc. All rights reserved.
RMX Series Technical Service Manual
1
RMX Series Performance Specifications
RMX 850
RMX 1450
RMX 2450
OUTPUT POWER in watts
FTC: 20 Hz–20 kHz @ 0.1% THD, both channels driven
8Ω per channel
185
260
450
4Ω per channel
280
400
650
EIA: 1 kHz @ 0.1% THD, both channels driven
8Ω per channel
200
280
500
4Ω per channel
300
450
750
1 kHz @ 1% THD, typical, both channels driven
2Ω per channel
430
700
1200
Bridge Mono:
8Ω, 20 Hz–20 kHz, 0.1% THD
530
800
1300
8Ω, 1 kHz, 0.1% THD
600
900
1500
4Ω, 1 kHz, 1% THD, typical
830
1400
2400
DYNAMIC HEADROOM
2 dB @ 4Ω
DISTORTION
SMPTE-IM
< 0.01%
< 0.01%
< 0.02%
FREQUENCY RESPONSE
20 Hz–20 kHz, +0/-1 dB
(at 10 dB below rated output power)
-3 dB points: 5 Hz and 50 kHz
DAMPING FACTOR
> 300 @ 8Ω
NOISE (unweighted 20 Hz to 20 kHz, below rated output)
100 dB
100 dB
100 dB
VOLTAGE GAIN
31.6× (30 dB)
40× (32 dB)
50× (34 dB)
INPUT SENSITIVITY, V RMS
full rated power @ 8Ω
1.15v (+3.4 dBu)
1.15v (+3.4 dBu)
1.23v (+4.0 dBu)
INPUT IMPEDANCE
10 KΩ unbalanced
20 KΩ balanced
CONTROLS
Front: AC switch, Ch. 1 and Ch. 2 gain
Rear: 10-position DIP switch
INDICATORS
POWER: Green LED
CLIP:
Red LED, 1 per channel
SIGNAL:
Yellow LED, 1 per channel
CONNECTORS
Input:
Active balanced; XLR and ¼" (6.3 mm) TRS, tip and pin 2 positive, and barrier strip
Output:
“Touch-Proof” binding posts and Neutrik Speakon™
COOLING
Continuously variable speed fan, back-to-front air flow
AMPLIFIER PROTECTION
Full short circuit, open circuit, thermal, ultrasonic, and RF protection
Stable into reactive or mismatched loads
LOAD PROTECTION
Turn-on/turn-off muting, AC coupling, triac crowbar (on each channel)
OUTPUT CIRCUIT TYPE
AB
AB
H
AB: Class AB complementary linear output
H: Class AB complementary linear output with Class H 2-step high efficiency circuit
DIMENSIONS
19.0" (48.3 cm) wide, 3.5" (8.9 cm) tall (2 rack spaces)
15.9" (40 cm) deep (rack mounting to rear support ears)
WEIGHT Shipping:
41 lb. (18.6 kg)
46 lb. (20.9 kg)
50.5 lb. (23 kg)
Net:
35 lb. (15.9 kg)
40 lb. (18.2 kg)
44.5 lb. (20.2 kg)
POWER REQUIREMENTS
Available for 120 or 220–240 VAC, 50/60 Hz
POWER CONSUMPTION @ 120 VAC
Typical1 Full2 Max3
Typical1 Full2 Max3
Typical1 Full2 Max3
(both channels driven)
Idle 0.5 A
Idle 0.5 A
Idle 0.6 A
Multiply currents by 0.5 for 230V units
8Ω
3A
4Ω
2Ω
8Ω
4.1 A
7.4 A
3.7 A
5.4 A
10 A
4.5 A
6.6 A
11.5 A
4Ω
6A
9.6 A
16 A
6.5 A
9.5 A*
17 A*
2Ω
9.3 A
14.7 A*
25 A*
8Ω
4A
9.7 A
16.4 A
4Ω
6.3 A
15.6 A
27 A
2Ω
9.2 A
23 A*
41 A*
US patents pending
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
2
QSC Audio Products, Inc.
Table of Contents
RMX Series Performance Specifications ........................................................................................................................................ 4
1. Introduction ........................................................................................................................................................................................ 6
1.1 Service bulletins ................................................................................................................................................................................ 6
1.2 The well-equipped service bench ..................................................................................................................................................... 6
1.3 Working with surface-mount components ....................................................................................................................................... 6
1.4 Series description ............................................................................................................................................................................. 8
1.5 Technical descriptions and theory of operation ................................................................................................................................ 8
2. Component identification and pinout ........................................................................................................................................... 10
3. Troubleshooting: Symptoms, causes, & remedies ..................................................................................................................... 12
3.1 Excessive current draw ..................................................................................................................................................................... 12
3.2 Protection, muting, and turn-on/turn-off delay problems ................................................................................................................ 12
3.3 Faults with signal present ................................................................................................................................................................. 13
3.4 Instability ........................................................................................................................................................................................... 13
3.5 Power supply & rail balancing problems .......................................................................................................................................... 14
4. RMX calibration procedures .......................................................................................................................................................... 14
4.1 Setting bias ....................................................................................................................................................................................... 14
4.2 Setting positive and negative current limits ..................................................................................................................................... 15
5. Servicing RMX amplifiers ............................................................................................................................................................... 16
5.1 Mechanical disassembly and re-assembly ....................................................................................................................................... 16
6. Replacement parts ............................................................................................................................................................................ 17
6.1 RMX 850 Replacement Parts ............................................................................................................................................................ 17
6.2 RMX 1450 Replacement Parts .......................................................................................................................................................... 20
6.3 RMX 2450 Replacement Parts .......................................................................................................................................................... 23
7. Schematics and diagrams ............................................................................................................................................................... 27
7.1 RMX Assembly/Disassembly Diagram 1 of 2 (All models) ............................................................................................................... 27
7.2 RMX Assembly/Disassembly Diagram 2 of 2 (All models) ............................................................................................................... 28
7.3 RMX 850 Schematic Diagram 1 of 3 Channel 1 ............................................................................................................................... 29
7.4 RMX 850 Schematic Diagram 2 of 3 Channel 2 ............................................................................................................................... 30
7.5 RMX 850 Schematic Diagram 3 of 3 Power Supply ......................................................................................................................... 31
7.6 RMX 1450 Schematic Diagram 1 of 3 Channel 1 ............................................................................................................................. 32
7.7 RMX 1450 Schematic Diagram 2 of 3 Channel 2 ............................................................................................................................. 33
7.8 RMX 1450 Schematic Diagram 3 of 3 Power Supply ....................................................................................................................... 34
7.9 RMX 2450 Schematic Diagram 1 of 3 Channel 1 ............................................................................................................................. 35
7.10 RMX 2450 Schematic Diagram 2 of 3 Channel 2 ........................................................................................................................... 36
7.11 RMX 2450 Schematic Diagram 3 of 3 Power Supply ..................................................................................................................... 37
7.12 RMX 850 Chassis Wiring Diagram ................................................................................................................................................. 38
7.13 RMX 1450 Chassis Wiring Diagram ............................................................................................................................................... 39
7.14 RMX 2450 Chassis Wiring Diagram ............................................................................................................................................... 40
RMX Series Technical Service Manual
3
1. Introduction
1.1 Service bulletins
Contact QSC Technical Services to make sure you have the most up-to-date service bulletins for RMX Series amplifiers. Service bulletins
may be distributed in hard copy, via fax, and electronically (Adobe Acrobat PDF) via CD-ROMs, FTP from the QSC web site
(www.qscaudio.com), and e-mail.
These service bulletins had been issued at the time this manual was printed: RMX0001, “Q205 Lead Stress” (RMX 2450 only); RMX0002,
“RMX Turn-on Delay” (all RMX models); RMX0003, “RMX 2450 Turn-off Mute” (RMX 2450); RMX0004, “RMX 2450 AC Wire Routing”
(RMX 2450); RMX0005, “RMX 2450 AC Wire Replacement” (RMX 2450); and RMX0006, “RMX 2450 IRFZ44N Field Effect Transistors (RMX 2450).
1.2 The well-equipped service bench
To properly service RMX amplifiers, a technician needs the right tools. The technician’s service bench should have the following equipment:
• Digital multimeter with RMS AC voltage and current
• Digital clamp-on ammeter
• Dual-trace oscilloscope
• Audio distortion analyzer
• Non-inductive load resistors, configurable as 8 ohms (min. 500 watts capacity), as 4 ohms (min. 750 watts capacity), and 2 ohms (min.
1200 watts capacity)
• Variable AC voltage source, such as a Variac or Powerstat variable transformer, with a rated current capacity of up to 25A (for 120V
models) or 12A (for 230V models)
• Low-distortion audio sine wave generator
• Philips and flat screwdrivers
• Soldering iron with a fine tip (25–60W recommended)
• Rosin-core solder (60/40 or 63/37)
• Long-nose pliers
• Diagonal cutters
• Wire strippers
Automated test equipment, such as an Audio Precision workstation, is very useful for servicing RMX amplifiers. Contact QSC Technical
Services to obtain applicable AP test files.
1.3 Working with surface-mount components
RMX amplifiers, like many modern electronic products, use surface-mount technology (SMT) components where appropriate in order to
make high-density circuitry that is reliable and economical to manufacture.
SMT components in the RMX amps are used in the small-signal and control circuits, so they do not handle significant amounts of power;
therefore, they are subject to very little stress and should seldom fail. Sometimes they do fail, or they require replacement for a performance
upgrade or modification. Thus, it is important to know how to work with SMT components.
Specialized tools and equipment exist for soldering, unsoldering, and removing SMT components quickly and
efficiently, but they are often expensive. Most SMT repairs, though, can be handled reasonably well with common
tools and equipment, such as tweezers, solder braid, and fine-tip soldering irons. The original factory components
are tacked to the board with a spot of glue, so you might have to apply some force to break the adhesive.
Two-terminal components (resistors, capacitors, diodes, etc.)
Removal
1 Use two soldering irons, preferably about 25 to 40 watts, with fine tips.
2 With a soldering iron in each hand, hold one tip on the solder at one end of the component and the other
tip on the other end (Figure 1.1).
3 Once the solder melts on both ends, grip the component between the two tips and lift it from the circuit
board.
4 Use solder braid and a soldering iron to remove the solder from the two pads (Figure 1.2).
4
Figure 1.1.
Solder braid
Figure 1.2.
QSC Audio Products, Inc.
Insertion
1 With a soldering iron and 60/40 or 63/37 eutectic-type solder, melt just enough solder onto one pad to
create a small mound (Figure 1.3).
2 Grasp the component in the middle with tweezers. Melt the small mound of solder with the iron and
place the component across the two pads (in the correct orientation, if the component is sensitive to
direction) and press it flat against the circuit board, with one end of the component immersed in the
melted solder (Figure 1.4).
3 Hold the component in place and take the soldering iron away. Let the solder harden to tack the
component in place.
4 Fully solder the other end of the component to its pad. Let the solder harden (Figure 1.5).
5 Fully solder the tacked end of the component to its pad (Figure 1.6).
Solder
Figure 1.3.
Tweezers
Figure 1.4.
Three-terminal components (transistors, etc.)
Solder
Figure 1.5.
Solder
Removal
1 With a soldering iron and solder braid, remove as much solder as possible from the middle terminal of
the component.
2 With a soldering iron in each hand, hold one tip on the solder at the terminal at one end of the component and the other tip on the terminal at the other end.
3 When the solder on both ends melts, grip the component between the two tips and lift it from the circuit
board. You might need to quickly touch the pad on the middle terminal with a soldering iron to melt any
remaining solder that might be holding the component down.
4 Use solder braid and a soldering iron to remove the solder from the three pads.
Figure 1.6.
Insertion
1 With a soldering iron and 60/40 or 63/37 eutectic-type solder, melt just enough solder onto one pad to create a small mound of solder.
2 Grasp the component with tweezers. Melt the small mound of solder with the iron and place the component in the correct orientation
across the three pads and press it flat against the circuit board, with one terminal of the component pressed into the melted solder.
3 Hold the component in place and take the soldering iron away. Let the solder harden to tack the component in place.
4 Fully solder the other terminals of the component to their pads. Let the solder harden.
5 Fully solder the tacked terminal of the component to its pad.
Multi-pin components (ICs, etc.)
Removal
Removing a multi-pin SMT component is a delicate procedure. Ideally, you should use a soldering iron with an attachment that allows you to
heat all the pins simultaneously.
If such a soldering device is not available, use this procedure:
1 Use a soldering iron and solder braid to remove as much solder as possible from the pins of the component.
2 With fine tweezers, carefully try to lift each pin to see if it’s free. If it’s not, touch it with the tip of the soldering iron and if necessary, use
the solder braid to remove the remaining solder.
3 Repeat the process until all the pins are free and you can remove the component.
Insertion
1 With a soldering iron and 60/40 or 63/37 eutectic-type solder, melt just enough solder onto one pad to create a small mound of solder. It
is usually easiest to use a pad that corresponds to one of the end or corner pins of the component.
2 Grasp the component with tweezers. Melt the small mound of solder with the iron and place the component in the correct orientation
upon its pads and gently press it flat against the circuit board, with the appropriate terminal of the component pressed into the melted
solder.
3 Hold the component in place and take the soldering iron away. Let the solder harden to tack the component in place.
4 Fully solder the other terminals of the component to their pads. Let the solder harden.
5 Fully solder the tacked terminal of the component to its pad.
RMX Series Technical Service Manual
5
The RMX 850 and RMX 1450 have single-sided printed circuit
boards. The RMX 2450 uses double-sided boards.
1.5 Technical descriptions and
theory of operation
Note: Some of these descriptions concern circuitry that is duplicated
in the amplifier’s two channels. For the sake of simplicity, the
descriptions are of Channel 1 only. Components in Channel 1 have a
3-digit designation with “1” as
+Vcc
the first digit; their equivalents in
Channel 1
Channel 2 have a “2” as the first
-Vcc
digit, followed by the same two
numerals. For example, R122 and
+Vcc
R222 have identical functions in
Channel 2
their respective channels.
-Vcc
Power supplies
Figure 1.7
Unlike other recent QSC amplifiers,
the RMX line uses strictly conventional power supplies, with large
transformers that operate at the 50 or 60 Hz frequency of the AC
line. The electrical current in the secondary circuitry is converted to
DC through a full-wave bridge rectifier. The resulting 100 or 120 Hz
ripple is filtered out by large capacitors that also serve as current
reservoirs for short-term, transient demands.
The supply provides a bipolar set of supply rails for each channel, with
equal quiescent positive and negative voltages, as shown in Figure 1.7.
Note that unlike many bipolar supplies for complementary transistor
arrangements, the secondary windings are not connected to ground at
the center. This is because the output transistors are directly mounted
to the heat sink, metal-to-metal, to maximize heat transfer; this grounds
the collectors, requiring somewhat different output and power supply
arrangements. The grounded-collector concept is described later in
this chapter.
+110V
In the RMX 2450, the
secondaries are tapped to
provide an intermediate set
of bipolar rails for the Class H
output circuitry. Figure 1.8
shows one channel. Class H
operation is described later
in this chapter.
The 24-volt cooling fan is
driven by a separate DC
supply that is powered by a
6
-110V
+55V Channel 1
-55V
Ch. 1 Center Tap
0.047 µF
12Ω 5W
×2
To Channel 2 Center Tap
Figure 1.8
Audio circuitry
The audio inputs are balanced to offer a reasonably high amount of
common-mode noise rejection. The input balancing is done using a
single op amp (one half of an NE5532 dual op amp) arranged as a
differential amplifier. The degree of common-mode rejection is
dependent on a close match between the input resistors (R100 and
R101 in Figure 1.9) and between the feedback resistor and the shunt
resistor (R105 and R106). The circuitry uses 1% precision resistors
to ensure at least 40 dB of common-mode rejection.
C101
180p-5%
^C_0805
R105
10.0K
A1
^R_0805
+IN_A
R100
NE5532
U101:1
R102
10.0K
1K
^R_0805
^R_0805
3
1
2
-IN_A
R101
C106
+
-
10-50NP
CW
QSC’s RMX Series amplifiers are entry-level professional audio
products, designed for good, basic performance and reliability at
low price. The series comprises three models: the RMX 850, RMX
1450, and RMX 2450. Each one has two audio channels and is two
rack spaces tall. See page 2 for complete specifications.
20-volt tap on the transformer primary. To minimize fan noise, the
fan speed is controlled by varying its actual DC voltage in response
to the amplifier’s heat sink temperatures. An optocoupler isolates
the fan control circuitry from the thermal sensors.
R106
R112
10.0K
10.0K
10K
^R_0805
^R_0805
R113
W
270
^R_0805
CCW
1.4 Series description
A1
C103
180p-5%
10K LINEAR 3B
RIGHT ANGLE POT
To LM13600 operational
transconductance amp
Figure 1.9
The feedback and shunt capacitors, C101 and C103, add a first-order
high-frequency roll-off, down 3 dB at 88.4 kHz (over two octaves
above the high end of the audio spectrum). This makes the amplifier
less susceptible to RF interference, high-frequency oscillations, etc.
Also in this stage, the feedback loop contains one half of a 13600 dual
operational transconductance amplifier (Figure 1.10). The OTA is part
of the clip limiter circuitry; when the clip limiter is activated, a control
voltage increases the transconductance of the OTA, which essentially decreases the impedance of the feedback loop and reduces
the gain of the stage in order to reduce the amount of clipping.
The gain control uses a linear potentiometer, but the impedances
loading the wiper to ground make the pot approximate an audio
taper over most of its rotation. After the wiper, RC networks roll off
the low end, if the LF filter is set for that channel, at either 30 or
50 Hz, depending on the DIP switch setting on the rear panel.
The next active device is another 5532 op amp, U101:2. Its output
drives the driver transistors, which in turn drive the output transistors.
The output section has a Class AB+B configuration; the drivers (a
complementary pair, Q105 and Q106, comprising an NPN MJE15032
and a PNP MJE 15033) are class AB. A series network of two diodes
and a 100-ohm trimpot provide the small amount of forward bias on
QSC Audio Products, Inc.
To input op amp U101:1
R108
From clip
detection
3
2
100
^R_0805
R111
R109
A1
R115
R103
10.0K
^R_0805
100
^R_0805
4
8
-
C105
270
100-25V
150K
^R_1206
R104
R110
820
^R_1206
R107
+
5
1
7
39K
^R_0805
U10:1
LM13600M 11
The output of the op amp also drives a group of four diodes (D102,
D103, D105, and D106) arranged as a full-wave rectifier. Normally,
the op amp’s output signal level is about 1 volt or less, which is all it
takes to drive the driver transistors.
7.50K
^R_0805
+14V
Clip detection
^R_0805
-14V
Q100
3906
CLIP LIMIT
SWITCH
(Open to defeat
clip limiter)
Figure 1.10
the transistor pair to keep crossover distortion minimal. In parallel
with the trimpot is a 50-ohm thermistor with a negative temperature
coefficient; as the circuitry warms, its resistance decreases. This
reduces VBE on both Q105 and Q106, decreasing the bias current to
reduce the threat of thermal runaway. The base of each driver transistor
is tied to ground through a diode and a 2.2K trimpot in series; these set
the current limiting threshold for their respective signal polarities.
The collector of each driver transistor directly drives the bases of its
output transistors, which are the main power-handling signal
devices. If you’re not familiar with the grounded-collector scheme,
the arrangement of the output transistors might look somewhat
strange: the positive voltage swings are handled by PNP transistors,
while the negative swings are handled by NPN devices. The
collectors all connect to ground, which allows them to be mounted
directly to the heat sink—metal-to-metal, without insulators in
between—for the best possible transfer of heat away from the
transistors. The emitters of the PNP and NPN transistors are
coupled through resistors to the positive and negative supply rails,
respectively, forming banks of common-emitter circuits driving the
supply rails. Consequently, the devices drive the rails with the audio
signal, which rides atop the DC. The output to the speaker load is
taken from the point between the positive and negative reservoir
capacitors; this is also where the negative feedback is taken from.
The nature of this arrangement, with audio signal riding on the
supply rails, is why the power supply has no ground reference.
Another unusual characteristic of the grounded-collector output
section is that the signal at the output to the speaker is actually
opposite in polarity to the signal at the op amp output. This is why
the negative feedback resistor, R122, connects to the op amp’s noninverting input instead of the inverting input.
The output point of the circuit couples to the output connector
through an RLC network (R160, R161, R162, L100, and C124) that
serves as a high-frequency snubber and also helps keep the amp
circuitry stable when driving capacitive loads.
RMX Series Technical Service Manual
But because this point is within the overall feedback loop, when
clipping occurs, the op amp puts out a much higher signal voltage to
try to make the output signal track the input. The four diodes rectify
the voltage to drive the clip indicator LED, LD100. The current
exiting the full-wave rectifier passes to ground through R127 and
also drives the base of transistor Q100 through R115. If the clip
limiter is switched on, Q100’s emitter is grounded, and when the
voltage across R127 goes sufficiently negative to forward-bias
Q100, which sends current through R111 and R103 into the amplifier
bias input of the operational transconductance amplifier (OTA),
U10:1. The OTA is in the negative feedback loop of U101:1, and
increasing its transconductance essentially reduces the impedance
of the feedback loop, which reduces the gain of the op amp stage.
This reduces the signal level until the amount of clipping is minimal.
When the clipping stops, Q100 is no longer forward-biased, and the
gain returns to normal.
DC protection
The RMX 2450 has a crowbar circuit, based on a triac and two
silicon controlled rectifiers, on the output to protect against DC
faults. If an amp channel puts out a DC voltage, which could be the
result of a component or circuit failure, it will first trigger either
D119 or D120, depending on the polarity of the voltage. The
triggered SCR will in turn trigger triac Q113, shorting the output to
ground through fuse F100. The fuse will blow, safeguarding the
speaker load from the DC fault.
The output sections of the RMX 850 and RMX 1450 are AC coupled.
Class H
The RMX 2450 utilizes a two-step Class H output section. It is
essentially a Class AB+B circuit but with two sets of bipolar supply
rails. On both the positive and the negative sets of rails, a comparator circuit, called a “step driver,” compares the audio signal to the
lower rail voltage. When necessary to fully reproduce the signal’s
voltage swing—just before the signal voltage reaches the lower rail
voltage—the step driver turns on a TMOS power FET to pull the
output transistors’ supply rail up from the lower voltage to the
higher one, and then back down again when the signal allows. By
keeping the transistors’ supply rails low whenever possible, the
devices dissipate less unused power and generate less waste heat,
making the amplifier more efficient than a straight class AB
amplifier with the same power points.
The comparators are 311-type ICs: U170 on the positive step and
U171 on the negative. Each one drives a high-gain complementary
transistor pair (2N3904 + 2N3906), which drive the gate of their
respective MOSFET.
7
Bridged mono operation and protection
When the amplifier is operated in bridged mono, its two channels
work in tandem to produce up to twice the voltage swing that a
single channel is capable of. To do this, Channel 2 produces a signal
identical to Channel 1’s, but opposite in polarity—in other words, a
mirror image.
Channel 2’s signal feed (bus BR_MONO_FEED) is an attenuated
version of the signal on Channel 1’s speaker bus. Closing DIP switch
#6 (set to “BRIDGE MONO ON”), connects the BR_MONO_FEED bus
on Channel 1 to the BR_RET bus on Channel 2. The BR_RET bus
drives the non-inverting input of op amp U201:2 directly.
With two channels operating as one, but each having its own
feedback and protection circuitry, it is vital to keep both running as
mirror images. A protection circuit monitors the balance between
Channel 1’s and Channel 2’s signals. Resistors R22 and R23 (R22A,
R22B, R23A, and R23B on the RMX 2450) are equal in value and
form a voltage divider between the two channel outputs. If the
output signals are mirror images, the voltage at the junction of the
resistors (bus BR_BAL) will be zero. If the signals are not mirror
images—for example, one channel is defunct, distorting, or reduced
in gain—a voltage will appear on BR_BAL. Through DIP switch 7,
the BR_BAL bus becomes bus BR_CUT and feeds the bases of
transistors Q8 and Q6, which are part of a 4-transistor circuit across
the +15V and -15V rails that supply the op amps and the input
circuitry. If the voltage on BR_CUT goes positive enough to forwardbias Q8, the transistor’s collector will collapse the +15V rail. At the
same time, the emitter current from Q8 will flow through R25 and
into the emitter of Q7, forward-biasing it, too. The collector of Q7
will then collapse the -15V rail.
Similarly, if BR_BAL goes sufficiently negative, it will forward-bias
Q6, in turn forward-biasing Q9, and these will collapse the ±15V rails.
With the rails collapsed, the op amp and the input circuitry will not
function, which will mute the audio.
2. Component identification and pinout
NE5532AN Dual operational amplifier
OUTPUT A 1
INVERTING
INPUT A 2
NON-INVERTING
INPUT A 3
8 V+
A
LM13600 Dual operational transconductance
amplifier
7 OUTPUT B
B
6 INVERTING
INPUT B
5 NON-INVERTING
INPUT B
V- 4
LM311 Voltage comparator
GROUND 1 1
8 V+
NON-INVERTING
INPUT 2
INVERTING
INPUT 3
7 OUTPUT
V- 4
5 BALANCE
AMP BIAS INPUT A
1
16 AMP BIAS INPUT B
DIODE BIAS A
2
15
DIODE BIAS B
14
NON-INVERTING
INPUT B
NON-INVERTING
INPUT A
3
INVERTING INPUT A
4
OUTPUT A
5
12 OUTPUT B
V-
6
11
BUFFER INPUT A
7
10 BUFFER INPUT B
BUFFER OUTPUT A
8
9
A
B
13 INVERTING INPUT B
V+
BUFFER OUTPUT B
6 BALANCE/
STROBE
2N5064 Sensitive gate thyristor
4N29 Opto-isolator
1
6
2
5
3
4
K A G
8
QSC Audio Products, Inc.
2N3904 (NPN) and 2N3906 (PNP) Small-signal
transistors
IRFZ44 TMOS power field effect transistor
C
3
1
2
B
E
B C E
MT1
MT2
G
MAC224 Triac
G
RMX Series Technical Service Manual
S
2SC5200 (PNP) and 2SA1943 (NPN) Power
transistors
MJE15032 (NPN) and MJE15033 (PNP) Driver
transistors
B C E
D
TOSHIBA
B
C
E
9
3. Troubleshooting: Symptoms, causes, & remedies
When first checking the operation of an amplifier on the bench,
always turn your variable transformer down to zero before plugging
the amplifier in. After you turn the amplifier on, gradually turn up
the AC voltage as you observe the amplifier’s behavior and its
current draw; this will help you determine what, if anything, is
wrong with it. If you see or smell smoke, flames, or any other signs
of short circuits or excessive current draw, quickly turn the AC back
down to zero. If no such problems occur, it is usually safe to turn the
AC up to the amplifier’s full operating voltage for further testing.
3.1 Excessive current draw
The customer complains of blowing circuit breakers or fuses, or
burning smell or smoke.
Symptoms covered:
• Fuses blow immediately
• The amplifier quickly gets very hot
• Line circuit breakers trip at turn-on
• The amplifier hums loudly and the chassis vibrates
• The amplifier emits smoke
• The amplifier gives off a burning smell
If the symptoms indicate a possible problem in the channel circuits
or output sections, you can isolate either channel module from the
power supply by pulling its fuses from the AC board.
Possible situations:
Excessive current with no signal present
If the amplifier seems to run hot and draws higher-than-normal
current when idling at full AC voltage, the cause could be bias
misadjustments in the output circuitry of one or both channels. See
the calibration procedures in the next section. In the RMX 2450, the
cause might also be blown step FETs; see service bulletin RMX0006.
Fast increase in current draw (current increases rapidly at
only a few volts AC)
• The main bridge rectifiers BR100 and/or BR200 (all models) and
BR101 and/or BR201 (RMX 2450) is reversed or shorted.
• Supply clamp diode pairs D117 and D118 and/or D217 and D218
is reversed or shorted.
• The drivers and/or power transistors is shorted on both polarities
(NPN and PNP) on one or both channels.
Moderate increase in current draw (current increases
slowly, doesn’t become excessive until about ¼ of the
amplifier’s full AC operating voltage)
• One polarity’s drivers and/or power transistors (NPN or PNP) is
shorted, on one or both channels.
• Individual supply clamp diodes D117, D118, D217, or D218 is
reversed or shorted.
• Bias diodes D108, D109, D208, or D209 or bias trimpots R131 or
R231 is open.
10
Slow increase in current draw (current doesn’t become
excessive until about half of the amplifier’s full AC operating
voltage; amplifier may pass signal)
• The bias is severely misadjusted, or bias diodes D108, D109,
D208, or D209 is defective.
• An oscillation is causing excessive current demand.
Runaway current draw (current increases sharply at about
25 to 33% of the amplifier’s full AC operating voltage)
One or more reservoir capacitors is reversed. CAUTION: the gas
buildup in a reversed electrolytic capacitor can cause it to
vent explosively. Immediately turn off power and let the capacitor
cool down before replacing it.
3.2 Protection, muting, and turnon/turn-off delay problems
The customer complains of amplifier locking up, or not turning on
and off correctly.
Symptoms covered:
• Both channels do not come out of protect
• Amplifier will not thermally shut down when it should
• Power LED doesn’t light
• Too little or too much muting delay
• No clip limiting
• Fan doesn’t run, or runs always at high speed
Possible situations:
Both channels stay in protect after turn-on
• Q4 or Q5 is shorted base-to-emitter.
• Voltage across D8 should be 14 to 15 volts DC. If it is low, check
D8 and R10; also, C7 and C8 is leaky.
• D9, R4, and/or R7 is open.
The amplifier will not thermally shut down when it overheats
Check for shorted D9, R4, or R7; check also for open LD1 (“POWER”
LED), R2, or R5.
Too much or too little muting delay
• Excessive delay at turn-on: check for open LD1, R2, or R5; check
for incorrect R10 or R15; check for shorted D9; also see service
bulletin RMX0002.
• Too short at turn-on (amplifier unmutes before the circuits stabilize,
causing a thump): check for incorrect or bad C7, C8, or R10.
• Amplifier doesn’t stay muted at turn-off: see service bulletin RMX0003
Power LED doesn’t light
Check for open or shorted LD1; check R2.
No clip limiting
• U10 is defective.
• DIP switches SW1:1 or SW1:10 is defective.
QSC Audio Products, Inc.
Fan doesn’t run
• The fan is defective.
• Check the fan connection to the AC board.
• Check R1 and BR1 on the AC board.
Fan runs always on high speed
• Q3 and/or U2 are shorted.
• Check PTC thermistors R4 and R7.
• R130 or R132 (Channel 1) or R230 or R232 (Channel 2) is open.
Excessive hum in loudspeaker when no signal is present
(RMX 850 and RMX 1450)
Check R118, R119, R218, and R219.
Excessive current draw with signal present (RMX 2450)
• Check triacs Q113 and Q213.
• Check D119, D120, D219 and D220.
3.3 Faults with signal present
3.4 Instability
The customer compains that the amplifier passes a signal but
doesn’t run correctly.
The customer complains of gain problems, spurious noises, or oscillations.
Symptoms covered:
• General output distortion
• “Ringing” sound in loudspeaker trailing an audio signal
• Excessive crossover distortion
• The output waveform appears fuzzy on an oscilloscope
Distinguish among the different symptoms of fuzziness (instability),
ringing (momentary instability after a transition), crossover distortion (often causing ringing), or general distortion.
• The output signal breaks up or is distorted
• “Ringing” sound in loudspeaker when no audio signal is present
• The output signal collapses when driving a normal speaker load
• Supply rails OK with no signal, but collapse when a signal passes
• The amplifier gets too hot
• One channel clips prematurely
• Excessive hum in loudspeaker when no audio signal is present
Possible situations:
The output signal breaks up or is distorted
• (RMX 850 and RMX 1450) Check the hum-null resistors R118,
R119, R218, and R219.
• Check the ground traces for continuity among speaker ground,
input ground, and AC ground.
“Ringing” sound in loudspeaker when no audio signal is present
• Check C114, C124, C214 and C224.
• Check or replace dual op amp U101 or U201.
The output signal collapses when driving a normal speaker load
• R139, R140, R239, and/or R240 is misadjusted.
• Check R118, R119, R218, and R219.
The supply rails are OK with no signal but collapse with a signal
• C112, C113, C212, and/or C213 is leaky.
• Check C114, C124, C214, and C224.
The amplifier gets too hot with no load
• Bias trimpots R131 or R231 are misadjusted, burned, or open.
• Bias diodes D108, D109, D208 and/or D209 are incorrect (should
be 1N4934).
• If the amplifier is producing high-frequency oscillations, check
C114, C124, C214, and C224.
• Check resistors R136, R137, R236, and R237.
• Op amp U101 or U201 is unstable.
One channel clips prematurely
• R146 or R147 (Channel 1) or R246 or R247 (Channel 2) are open.
• R139 or R140 (Channel 1) or R239 or R240 (Channel 2) are misadjusted.
• Check R157, R158, R198 (RMX 2450 only), D115, and D116
(Channel 1) or R157, R258, R298 (RMX 2450 only), D215, and
D216 (Channel 2).
• (RMX 850 and RMX 1450) Check R118 and R119 (Channel 1) or
R218 and R219 (Channel 2).
RMX Series Technical Service Manual
Symptoms covered:
Possible situations:
General distortion in the output signal
• Severe distortion, at any load, often with abnormally high current
draw: check the slew rate capacitors C114, C115, and C116
(Channel 1) or C214, C215, and C216 (Channel 2).
• Moderate distortion, especially with light loading: stability
capacitors C124 and C126 (Channel 1) or C224 and C226 is too
high in capacitance; also check the slew rate capacitors C114,
C115, and C116 (Channel 1) or C214, C215, and C216 (Channel
2), and the output filter resistors R161, R162, R154, and R155
(Channel 1) or R261, R262, R254, or R255 (Channel 2).
• Distortion with low gain: check the feedback shunt components
R120, R138, and C125 (Channel 1) or R220, R238, or C225
(Channel 2); also check for broken circuit traces around the
components; U101 (Channel 1) or U201 (Channel 2) is defective
or its socket is contaminated.
Ringing sound trailing the audio signal
• This usually indicates marginal instability and is usually triggered
by the signal passing through zero volts (the crossover point).
Check the stability components and output filters.
• With a sine wave test signal, use an oscilloscope to check for
excessive crossover notch at the output signal’s zero crossings.
Excessive crossover distortion (unbalanced, asymmetrical,
or excessively large crossover notch)
• Severe crossover discontinuity: bias diodes D108 or D109
(Channel 1) or D208 or D209 (Channel 2) are shorted.
• Moderate discontinuity: bias diodes D108 or D109 (Channel 1) or
D208 or D209 (Channel 2) are out of spec.
• R131 (Channel 1) or R231 (Channel 2) is defective.
• Base resistors R136 or R137 (Channel 1) or R236 or R237
(Channel 2) are open. Also check the NTC thermistors R134
(Channel 1) or R234 (Channel 2).
11
3.5 Power supply & rail balancing
problems
Symptoms covered:
• Insufficient or excessive current limiting into a shorted load
• Op amp rails too high with a shorted load
• Uneven voltages on supply rails
A channel’s output current should remain unaffected when driving
resistive loads as low as 2 ohms per channel. When driving a short
circuit, the current limiting circuit should collapse the output to a
lower current. This is done by dropping the op amp’s supply rails
from a normal ±14–15 volts down to about ±5–6 volts. Normally, the
output signal helps replenish the op amp supply rails through D115
and D116 (Channel 1) and D215 and D216 (Channel 2), but a short
circuit or excessively low load impedance prevents the replenishment, and the op amp rails collapse because they can’t supply
enough current to let the op amp drive both the clip LED and the
driver transistors. The current limit trimpots R139, R140, R239, and
R240 permit adjustment of the current limit thresholds. See the
RMX calibration section of this manual for adjustment procedures.
Possible situations:
Excessive current into short (insufficient limiting)
• If the op amp rails are dropping to ±5 to 6 volts as they should:
the 5.6V zener diodes D107 and/or D110 (Channel 1) or D207
and/or D210 (Channel 2) are reversed or shorted.
• If high crossover distortion is present: bias diodes D108 or D109
(Channel 1) or D208 or D209 (Channel 2) are shorted.
Excessive current into short (op amp rails are not dropping)
• The op amp U101 (Channel 1) or U201 (Channel 2) is defective,
with insufficient output current.
• Clip LED LD100 (Channel 1) or LD200 (Channel 2) and/or its
rectifying diodes (Channel 1: D102, D103, D105, D106; Channel 2:
D202, D203, D205, D206) are open.
• When driving a short circuit, the output section’s positive and
negative supply rail voltages should be equal, within 3 volts. If
they aren’t, check D107, D110, R146, and R147 (Channel 1) or
D207, D210, R246, and R247 (Channel 2).
Ω or short (excessive or premature limiting)
Weak current into 2Ω
• Bias resistors R130 and R132 (Channel 1) or R230 and R232
(Channel 2) are too high.
• Driver transistors (Channel 1: Q105, Q106; Channel 2: Q205,
Q206) have very low gain.
• One or more emitter resistors in the output section are open.
Ω, weak into short
Current OK at 2Ω
• LD100, D102, D103, D105, or D106 (Channel 1), or LD200, D202,
D203, D205, or D206 (Channel 2), are shorted.
• Zener voltage of diodes D107 or D110 (Channel 1), or D207 or
D210 (Channel 2), is too high.
Ω
Current limits properly into short, but current is weak at 2Ω
• If the op amp rails are low (< 14–15 volts) when driving a 2-ohm
load without clipping, check the resistors R157 and R158
(Channel 1, all models), R198 (Channel 1, RMX 2450 only) and
diodes D115 and D116 (Channel 1, all models), or R257 and R258
(Channel 2, all models), R298 (Channel 2, RMX 2450 only) and
diodes D215 and D216 (Channel 2, all models).
• If the op amp rails are normal (14–15 volts) when driving a 2-ohm
load without clipping, usually the output section gain is too low: weak
driver transistors, open output transistors, or open emitter resistors.
Check the value of the driver transistors’ emitter resistors, too:
R146 and R147 (Channel 1) or R246 and R247 (Channel 2).
Rail voltages unequal
The balance between the positive and negative rail voltages is set
by a voltage divider comprising resistors R118 and R119 (Channel 1)
and R218 and R219 (Channel 2). If the amplifier channel passes a
signal but clips unevenly due to unequal rail voltages, this voltage
divider is the likely culprit.
4. RMX calibration procedures
4.1 Setting bias
Always set the bias
• after replacing any output or driver transistor.
• after replacing any diode or resistor in the driver/output circuitry.
• if the amplifier seems to run too hot at idle.
• if the amplifier exhibits crossover distortion.
The bias network sets the quiescent base current in the NPN and
PNP driver transistors, which in turn sets the quiescent current in
the output transistors. The driver transistors should both be slightly
“on” at idle so that the transitions of the signal voltage between
positive and negative are smooth and free of gaps or glitches. Too
12
much bias current will cause the amplifier to run hotter than it
should, especially at idle, while too little will cause noticeable
crossover distortion, especially at low signal levels.
The amplifier circuitry must be cool, or at least within a couple
degrees of ambient air temperature, and the top cover must be
removed. If the driver and output transistors are significantly
warmer than the ambient air, leave the amplifier off and let it cool
before proceeding.
Before turning the amplifier on to set bias on one or both channels,
familiarize yourself with the locations of the trimpots (R131 and
R231) and the voltage measuring points so you can work quickly but
thoroughly. If the amplifier warms up before you finish setting the
QSC Audio Products, Inc.
onto one of the brown wires running to the AC switch or onto
the gray output wire from channel 1's module.
bias, you will need to shut the amplifier off and let it cool down
before you resume.
Tools and resources you will need:
4.
• Small flat screwdriver (non-conductive) for adjusting trimpots
• DC voltmeter
• AC power
Turn the gain control all the way up. Adjust trimpots R139 and
R140 equally until the current measured falls within the range
shown in Table 1.
5.
Turn the gain control all the way down and remove the short
circuit so the channel drives the 2-ohm load. Turn the gain control
back up until the output clips. The voltage at which the signal
starts to clip should fall within the range shown in Table 1. If the
clipping is asymmetrical, that is, the signal clips on either the
positive or negative side first, adjust R139 to make it symmetrical.
6.
Turn the gain control down. If the amp has begun to warm up
shut it off and let it cool a few minutes before proceeding with
Channel 2.
7.
Repeat steps 1 through 5 for Channel 2. Use trimpots R239 and
R240 to adjust the current limiting in steps 11 and 12.
8.
Turn both channels’ gain controls all the way down. Clamp the
ammeter onto one of the amp’s AC wires and check the amp’s
idle current. If the amplifier is still at about room temperature,
the idle current should match the value shown in Table 1.
Procedure
1.
Turn the amplifier’s gain controls all the way down. No test
signal is needed.
2.
Plug the amplifier into an appropriate AC source. Turn the
amplifier on.
3.
Channel 1: While measuring the DC voltage across resistor R146,
adjust trimpot R131 to obtain the voltage listed in Table 1.
4.
Channel 2: While measuring the DC voltage across resistor R246,
adjust trimpot R231 to obtain the voltage listed in Table 1.
After setting the bias, calibrate the positive and negative current
limiting; instructions for the procedure follow below.
4.2 Setting positive and negative
current limits
Tools and resources you will need
• Oscilloscope
• 2-ohm resistive load (rated for at least 1200 watts)
• Shorting connector for amplifier output
• Variable AC transformer (e.g., Variac, Powerstat, etc.) rated for
25A (120V) or 12A (230V). Make sure the AC supply is appropriate for the amplifier.
Table 1: Bias and current limit adjustments
• 1 kHz audio sine wave generator
• Digital multimeter
Calibrations
Adjust
• Clamp-on digital current meter
(e.g., Fluke 30 Clamp Meter)
Channel 1 bias: DC voltage across R146
R131
• Small flat screwdriver (nonChannel 2 bias: DC voltage across R246
R231
conductive) for adjusting trimpots
Procedure
1.
2.
3.
Set the audio sine generator to 1
kHz at 1 volt RMS and connect it
to Channel 1's input. Connect a
2-ohm load and the oscilloscope
probe across Channel 1's output.
Turn up Channel 1's gain control
partway. On the oscilloscope you
should see the amplitude of the
sine wave increase accordingly.
Turn the gain control back down
and apply a short circuit across
the output terminals of Channel
1. Clamp a current probe either
RMX Series Technical Service Manual
RMX 850
RMX 1450
RMX 2450
0.16 V
0.14 V
0.09 V
0.16 V
0.14 V
0.09 V
Output current into shorted load
Channel 1: R139 & R140
Channel 2: R239 & R240
4–4.5 A
4–5 A
8–9 A
AC current when driving shorted load*
Channel 1: R139 & R140
Channel 2: R239 & R240
3.75–4.5 A
4.5–5.5 A
5–6.5 A
Clipping voltage into 2 ohms (RMS)
Channel 1: Adjust R139
for symmetry
Channel 2: Adjust R239
for symmetry
26–29 V
33.5–37.5 V
44–49 V
Clipping voltage into 2 ohms (peak)
Channel 1: Adjust R139
for symmetry
Channel 2: Adjust R239
for symmetry
36.8–41 V
47.4–53 V
62.2–69.3 V
0.4 A, ±10%
0.4 A, ±10%
0.5 A, ±10%
Idle AC demand* (at ambient temperature;
higher when hot)
*Figures shown are for 120V amplifiers; multiply current by 0.5 for 230V.
13
5. Servicing RMX amplifiers
5.1 Mechanical disassembly and re-assembly
Replacing components will usually require removing the channel modules and/or AC board from the amplifier chassis, especially on the RMX 850
and RMX 1450, which have single-side printed circuit boards. The RMX 2450 has double-side boards; many of the through-hole components on
the upper side of the board can be unsoldered and soldered from the top side of the board, so removing modules or boards is not always necessary.
See the fold-out assembly guides on pages 23 and 24 in this manual for assistance.
NOTE: As viewed from the front of the amplifier, the left channel module is Channel 1 and the right is Channel 2 except in the RMX 2450; its
right module is Channel 1, and its left is Channel 2.
Removing the channel modules
1.
Disconnect the amplifier from AC power and allow at least 10 minutes for internal voltages to bleed down.
2.
Using a Philips screwdriver, remove the screws that fasten the top cover to the chassis. Also remove the top cover’s four recessed
screws that fasten it to the heat sinks. As you remove screws, set them aside, but also make note of where each type is used so you
can properly re-assemble the amplifier.
3.
Lift the top cover up at the rear and carefully pull it toward the back, removing the five hooks on the front edge from their slots in the chassis.
4.
Pull the gain control knobs straight off from the potentiometer shafts.
5.
Tip the amplifier up on its side and remove the four screws that fasten the heat sinks to the chassis.
6.
Set the amplifier back down and remove the screws that mount the channel modules to the chassis standoffs. There are six screws in
the left module and five in the right one.
7.
Remove the four screws that fasten the fan, fan shroud, and fan guard to the chassis. Lift the fan shroud out from the chassis; this will
give you room to properly remove the modules from the chassis.
8.
Disconnect the wire and cable connections to the channel modules. All of the connections are either detachable headers or ¼-inch
quick-connect tabs that are disconnected by pulling them straight up. No unsoldering is necessary.
9.
Slide the channel modules toward the back so the potentiometer shafts and front panel LEDs are clear of their holes in the front panel.
Lift the channel modules out from the chassis.
10. Re-assembly is the opposite of disassembly.
Removing the AC board
The AC board provides AC voltage selection, rectification of the transformer secondary current, and a regulated DC supply for the cooling
fan. It seldom needs to be replaced unless it is physically damaged itself. Most failures involving the AC board can be repaired through
replacement of individual components.
WARNING: Regulatory agencies require that any operating voltage conversions from 120 volts to any other voltage be done only by QSC’s
factory service. Any other operating voltage conversions may be done only by a QSC-authorized service center or international distributor.
1. Disconnect the amplifier from AC power and allow at least 10 minutes for internal voltages to bleed down.
2.
Remove the four screws that fasten the fan, fan shroud, and fan guard to the chassis. Lift the fan shroud out from the chassis.
3.
Disconnect the wires that connect to the channel modules. All of the large single wires attach to the channel modules with ¼-inch
quick-connect tabs that are detached by pulling them straight up. The remaining three black wires disconnect at the left channel
module with a detachable header.
If you are planning to replace the AC board with another, carefully cut each of the transformer wires connecting to the board just above
its solder tab. You must leave enough slack to allow connection to the new AC board. Remove the old heat shrink tubing from the wires
and strip the wire ends about 0.25 inch or 6.3 mm.
4.
Remove the five screws that attach the AC board to the chassis standoffs. Lift the board out from the chassis.
5.
Re-assembly is the opposite of disassembly. If you’re using a new AC board, slide new pieces of heat shrink tubing over the transformer wires before you solder them to the appropriate tabs on the board; after soldering, cover the joints with the tubing and use a
heat gun or other heat source to shrink them tightly.
14
QSC Audio Products, Inc.
6. Replacement parts
6.1 RMX 850 Replacement Parts
QSC part #
Description
Qty.
Notes or Component Reference
POWER TRANSFORMER 700
AC INLET
KNOB CONTROL
RACK-MOUNT BRACKET
ROCKER POWER SWITCH
CIRCUIT BREAKER 10A
CIRCUIT BREAKER 5A
AC CORD SET 15A
POWER CORD SET CE
DC FAN 24V 80X80 (+5V)
1
1
2
2
1
1
1
1
1
1
CM 250V 0.22uF 10% RL
CE 35V 1000UF 20% RL
IC 4N29
FUSE HOLDER (DIA.6.3MM
RCF 1/8W 2K 5% ATS
RCF 1/8W 470K 5% ATS
RCF 1/8W 6.8K 5% ATS
RMF 2W 120R 5% AL METAL
DIODE RECT 1A 200V DB103
BRIDGE RECTIFIER 400V
TR TIP31C SAMSUNG
FU T10A 125V/250V
HEATSINK
POLYSWITCH 0.15 ohm 1.1A
THERMAL NTC 30A 1 ohm
2
1
1
4
1
1
2
1
1
2
1
2
1
1
1
C127, C227
C6
U2
REF: F100, F200
R13
R12
R9, R14
R17
BR1
BR100, BR200
Q3
F100, F200
REF: Q3
R1
R21
CM 50V 0.022UF 5% RL
CM 50V 3300pF 5% RL 6x12
CM 250V 0.068u 5% RL
CE 50V 47uF 20% RL
CE 250V 4.7u 20% RL
SPRING COIL 2uH
LED 04mm GREEN W/STAND
RMF 1W 22R 5% AT FP
RMF 1W 6.8R 5% AL METAL
RMF 2W 15K 5% AL METAL
RMF 2W 5.6R 5% AL METAL
RMF 3W 0.22R 10% RL RGC3
RMF 5W 12R 5% AL METAL
RMF 5W 2K 5% AL METAL
RMF 5W 820R 5% AL METAL
SVR H6 100R RH0615C
SVR 2.2K H3 7X7.6 R0615C
DIODE IN4004 AL
DIODE IN4934 AT
DZ 1/2W 5.5-5.8V AT
DZ 1W 15V AT TEMIC
TR MJE15032
TR MJE15033
2
2
1
1
1
1
1
2
2
2
1
6
2
2
2
1
2
5
2
2
2
1
1
C116, C119
C117, C118
C124
C8
C7
L100
LD1
R136, R137
R146, R147
R2, R5
R160
R142, R148, R149, R152, R153, R159
R161, R162
R133, R135
R157, R158
R131
R139, R140
D1, D11, D12, D117, D118
D108, D109
D107, D110
D8, D15
Q105
Q106
Misc.
1806-2505-0
2113-1144-0
2444-1001-1
4134-8432-0
5200-4717-0
5200-3532-0
5200-4730-0
7010-9640-0
7009-8620-0
8900-9050-1
For 120V models
For 230V models
For 120V models
For 230V models
AC board
153R-224K-5-Y1
157Q-108M-5-X9E
3130-9270-0
4134-8851-0
4701-202J-C
4701-474J-C
4701-682J-C
4719-121J-1-X
4840-1760-0
4840-2150-0
4860-2620-5
5100-1030-3A
5400-0831-0
8910-0273-0
8910-0275-0
Channel 1 module
153F-223J-5-LQ
153F-332J-5-KW
153R-683J-5-WWM
157F-476M-5-LU
157R-475M-5-OV
1804-1030-0
3700-4531-G
4718-220J-2-P
4718-6R8J-1-X
4719-153J-1-X
4719-5R6J-1-X
471A-022K-5-N
471B-120J-1-X
471B-202J-1-X
471B-821J-1-X
4756-1016-3-06
4756-2226-3-06
4804-0040-1
4804-9340-2
4837-5B10-2
4838-15V6-2
4860-5020-5
4860-5030-5
RMX Series Technical Service Manual
15
Channel 1 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
4860-5050-5
4860-5060-5
4860-8890-0
8910-0062-0
8910-0274-0
8910-0488-0
TR 2SC5200 T0-3P (L)
TR 2SA1943 T0-3P (L)
TR MPS A06 VCE 80V NS
CE 80V 4700U 20% RL 25X
THERMAL PTC 60C 100 ohm
ROD THERMISTOR NTC 50ohm
3
3
1
2
1
1
Q108, Q110, Q112
Q103, Q107, Q109
Q5
C120, C121
R7
R134
CC 50V 2200pF 10% 1206 1
CC 100V 0.001U 5% 1206
RMG 1/10W 10K 5% 0805
RMG 1/10W 1.5K 5% 0805
RMG 1/10W 2K 5% 0805
RMG 1/10W 220K 5% 0805
RMG 1/10W 47R 5% 0805
RMG 1/8W 1M 5% 1206
RMG 1/8W 150K 5% 1206
RMG 1/8W 220K 5% 1206
RMG 1/8W 47K 5% 1206
RMG 1/8W 470K 5% 1206
RMG 1/8W 6.8K 5% 1206
RMG 1/8W 820R 5% 1206
DIODE LL4148 SM
TR 3906 PNP SM
TR 3904 HFE 100-300 SM
TR KST42
1
1
1
1
1
1
2
2
1
2
1
1
1
2
15
3
4
1
C115
C114
R128
R129
R8
R26
R25, R124
R3, R6
R10
R18, R27
R125
R15
R19
R130, R132
D2–D7, D9, D14, D104, D111–D116
Q4, Q6, Q7
Q8, Q9, Q101, Q102
Q1
CM 50V 0.15UF 5% RL
CM 50V 0.022UF 5% RL
CM 50V 0.22UF 5% RL
CM 50V 3300pF 5% RL 6x12
CM 250V 0.068u 5% RL
CE 25V 100uF 20% RL 6x12
CE 25V 220uF 20% RL
CE 50V 10¦F 20% RL
SPRING COIL 2uH
8 PIN IC SOCKET DIP
IC-NE5532 OPER. AMP PHIL
LED 04mm RED W/STAND
LED 04mm YELLOW W/STAND
RMF 3W 0.22R 10% RL RGC3
RMF 5W 12R 5% AL METAL
RMF 5W 2K 5% AL METAL
RMF 5W 820R 5% AL METAL
RMF 1/2W 10K 1% AT
RMF 1/2W 9.09K 1% AT
RMF 1W 22R 5% AT FP
VR V012CPH, D-SHAFT 10K
SVR H6 100R RH0615C
SVR 2.2K H3 7X7.6 R0615C
RMF 1W 6.8R 5% AL METAL
RMF 2W 5.6R 5% AL METAL
DIODE IN4004 AL
DIODE IN4934 AT
DZ 1/2W 5.5-5.8V AT
DZ 1W 15V AT TEMIC
TR MJE15032
4
2
2
2
1
2
4
2
1
2
2
2
2
6
2
2
2
2
1
2
2
1
2
3
1
4
2
2
4
1
C108, C109, C208, C209
C216, C219
C107, C207
C217, C218
C224
C105, C205
C112, C113, C212, C213
C106, C206
L200
REF: U101, U201
U101, U201
LD100, LD200
LD101, LD201
R242, R248, R249, R252, R253, R259
R261, R262
R233, R235
R257, R258
R122, R222
R123
R236, R237
R112, R212
R231
R239, R240
R20, R246, R247
R260
D10, D13, D217, D218
D208, D209
D207, D210
D100, D101, D200, D201
Q205
Channel 1 SMT parts
150F-222K-6-CF
150H-102J-6-CF
4720-103J-J
4720-152J-J
4720-202J-J
4720-224J-J
4720-470J-J
4721-105J-6
4721-154J-6
4721-224J-6
4721-473J-6
4721-474J-6
4721-682J-6
4721-821J-6
4804-1480-3
4853-9060-3
4860-0640-3
4860-5110-3
Channel 2 module
153F-154J-5-NLM
153F-223J-5-LQ
153F-224J-5-NLM
153F-332J-5-KW
153R-683J-5-WWM
157E-107M-5-KW
157E-227M-5-PU
157F-106M-5-LUN
1804-1030-0
2101-1991-0
3130-2430-0
3700-4529-R
3700-4530-Y
471A-022K-5-N
471B-120J-1-X
471B-202J-1-X
471B-821J-1-X
4717-103A-2
4717-9091-2
4718-220J-2-P
4750-6200-0
4756-1016-3-06
4756-2226-3-06
4718-6R8J-1-X
4719-5R6J-1-X
4804-0040-1
4804-9340-2
4837-5B10-2
4838-15V6-2
4860-5020-5
16
QSC Audio Products, Inc.
Channel 2 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
4860-5030-5
4860-5050-5
4860-5060-5
8910-0062-0
8910-0274-0
8910-0488-0
TR MJE15033
TR 2SC5200 T0-3P (L)
TR 2SA1943 T0-3P (L)
CE 80V 4700U 20% RL 25X
THERMAL PTC 60C 100 ohm
ROD THERMISTOR NTC 50ohm
1
3
3
2
1
1
Q206
Q208, Q210, Q212
Q203, Q207, Q209
C220, C221
R4
R234
CER2 1206 X7R 50V 100N
CC 50V 180P 10% 0805
CC 50V 2200pF 10% 1206 1
CC 50V 56pF 10% 0805 1.2
CC 100V 0.001µF 5% 1206
CTC 0/30 56P 5% 1206
IC NE5517D
RMG 1/10W 100R 5% 0805
RMG 1/10W 1K 5% 0805
RMG 1/10W 10K 1% 0805
RMG 1/10W 10K 5% 0805
RMG 1/10W 1.5K 5% 0805
RMG 1/10W 20K 1% 0805
RMG 1/10W 270R 5% 0805
RMG 1/10W 3.3K 5% 0805
RMG 1/10W 39K 5% 0805
RMG 1/10W 47R 5% 0805
RMG 1/10W 4.7K 5% 0805
RMG 1/10W 7.5K 5% 0805
RMG 1/8W 150K 1% 1206
RMG 1/8W 150K 5% 1206
RMG 1/8W 33K 5% 1206
RMG 1/8W 390K 5% 1206
RMG 1/8W 47K 5% 1206
RMG 1/8W 820R 5% 1206
DIODE LL4148 SM
TR 3906 PNP SM
TR 3904 HFE 100-300 SM
3
4
1
2
1
2
1
6
3
8
3
1
4
6
1
2
1
2
2
4
2
2
2
1
4
15
2
2
C100, C102, C104
C101, C103, C201, C203
C215
C110, C210
C214
C111, C211
U10
R109, R110, R127, R209, R211, R227
R102, R126, R202
R100, R101, R105, R106, R200, R201, R205, R206
R103, R203, R228
R229
R117, R121, R217, R221
R111, R113, R120, R210, R213, R220
R24
R107, R207
R224
R114, R214
R108, R208
R118, R119, R218, R219
R104, R204
R22, R23
R116, R216
R225
R115, R215, R230, R232
D102, D103, D105, D106, D202–D206, D211–D216
Q100, Q200
Q201, Q202
CC 50V 470pF 5% RL 8x3.5
26 PIN IEC RIBBON CABLE
XLR FEMALE CONN.
PHONE JACK 06.4
5 POLE SPEAKER TERMINAL
10 POLE DIP SWITCH
4
1
2
2
1
1
C1–C4
J1
J101, J201
J102, J202
J5
SW1
SPEAKON NEUTRIK 4 WIRE
4-POLE SPEAKER TERMINAL
OUTPUT POST PLUG FOR CE
OUTPUT POST PLUG FOR CE
2
1
2
2
J100, J200
J103
For European models only
For European models only
Channel 2 SMT parts
150F-104K-6-CF
150F-181K-J-BD
150F-222K-6-CF
150F-560K-J-BD
150H-102J-6-CF
15CG-560J-6-CF
3131-9730-0
4720-101J-J
4720-102J-J
4720-103A-J
4720-103J-J
4720-152J-J
4720-203A-J
4720-271J-J
4720-332J-J
4720-393J-J
4720-470J-J
4720-472J-J
4720-752J-J
4721-154A-6
4721-154J-6
4721-333J-6
4721-394J-6
4721-473J-6
4721-821J-6
4804-1480-3
4853-9060-3
4860-0640-3
Input board
150F-471J-5-OF
7010-9860-0
2113-1337-1
2113-1652-0
2113-1335-0
5200-4713-0
Output board
2113-1336-1
2113-1338-0
4154-2111-0
4154-2121-0
RMX Series Technical Service Manual
17
6.2 RMX 1450 Replacement Parts
QSC part #
Description
Qty.
Notes or Component Reference
POWER TRANSFORMER, 1200
AC INLET
METAL WIND GUIDE
FAN GUIDE
ROCKER POWER SWITCH
CIRCUIT BREAKER 15A
CIRCUIT BREAKER 8A
AC CORD SET 15A
POWER CORD SET CE
DC FAN 24V 80X80 (+5V)
1
1
1
1
1
1
1
1
1
1
CM 250V 0.22uF 10% RL
CE 35V 1000UF 20% RL
IC 4N29
FUSE HOLDER (DIA.6.3MM
RCF 1/8W 2K 5% ATS
RCF 1/8W 470K 5% ATS
RCF 1/8W 6.8K 5% ATS
RMF 2W 120R 5% AL METAL
DIODE RECT 1A 200V DB103
BRIDGE RECTIFIER 400V
TR TIP31C SAMSUNG
FUSE T12A/250V 6.3X32MM
HEATSINK
POLYSWITCH 0.15 ohm 1.1A
THERMAL NTC 30A 1 ohm
2
1
1
4
1
1
2
1
1
2
1
2
1
1
1
CM 50V 0.022UF 5% RL
CM 50V 3300pF 5% RL 6x12
CM 250V 0.068u 5% RL
CE 50V 47uF 20% RL
CE 250V 4.7u 20% RL
SPRNG COIL 2uH(14gaWIRE)
LED 04mm GREEN W/STAND
RMF 1W 22R 5% AT FP
RMF 1W 6.8R 5% AL METAL
RMF 2W 15K 5% AL METAL
RMF 2W 5.6R 5% AL METAL
RMF 3W 0.22R 10% RL RGC3
RMF 5W 1K 5% AL METAL
RMF 5W 12R 5% AL METAL
RMF 5W 3K 5% AL METAL
SVR H6 100R RH0615C
SVR 2.2K H3 7X7.6 R0615C
DIODE IN4004 AL
DIODE IN4934 AT
DZ 1/2W 5.5-5.8V AT
DZ 1W 15V AT TEMIC
TR MJE15032
TR MJE15033
TR 2SC5200 T0-3P (L)
TR 2SA1943 T0-3P (L)
TR MPS A06 VCE 80V NS
CE 100V 3300u 20% 25X50
2
C116, C119
2
C117, C118
1
C124
1
C8
1
C7
1
L100
1
LD1
2
R136, R137
2
R146, R147
2
R2, R5
1
R160
8
R142, R143, R148, R149, R152, R153, R156, R159
2
R157, R158
2
R161, R162
2
R133, R135
1
R131
2
R139, R140
5
D1, D11, D12, D117, D118
2
D108, D109
2
D107, D110
D8, D15
1
Q105
1
Q106
4
Q104, Q108, Q110, Q112
4
Q103, Q107, Q109, Q111
1
Q5
4
C120–C123
Misc.
1806-2506-0
2113-1144-0
4134-9101-0
4154-0361-0
5200-4717-0
5200-3531-0
5200-4731-0
7010-9640-0
7009-8620-0
8900-9050-1
For 120V models
For 230V models
For 120V models
For 230V models
AC Board
153R-224K-5-Y1
157Q-108M-5-X9E
3130-9270-0
4134-8851-0
4701-202J-C
4701-474J-C
4701-682J-C
4719-121J-1-X
4840-1760-0
4840-2150-0
4860-2620-5
5120-0061-0
5400-0831-0
8910-0273-0
8910-0275-0
C127, C227
C6
U2
REF: F100, F200
R13
R12
R9, R14
R17
BR1
BR100, BR200
Q3
F100, F200
REF: Q3
R1
R21
Channel 1 module
153F-223J-5-LQ
153F-332J-5-KW
153R-683J-5-WWM
157F-476M-5-LU
157R-475M-5-OV
1804-1040-0
3700-4531-G
4718-220J-2-P
4718-6R8J-1-X
4719-153J-1-X
4719-5R6J-1-X
471A-022K-5-N
471B-102J-1-X
471B-120J-1-X
471B-302J-1-X
4756-1016-3-06
4756-2226-3-06
4804-0040-1
4804-9340-2
4837-5B10-2
4838-15V6-2
4860-5020-5
4860-5030-5
4860-5050-5
4860-5060-5
4860-8890-0
8910-0272-0
18
QSC Audio Products, Inc.
Channel 2 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
8910-0274-0
8910-0488-0
THERMAL PTC 60C 100 ohm
ROD THERMISTOR NTC 50ohm
1
1
R7
R134
CC 50V 2200pF 10% 1206 1
CC 100V 0.001U 5% 1206
RMG 1/10W 10K 5% 0805
RMG 1/10W 1.5K 5% 0805
RMG 1/10W 2K 5% 0805
RMG 1/10W 220K 5% 0805
RMG 1/10W 47R 5% 0805
RMG 1/8W 1M 5% 1206
RMG 1/8W 150K 5% 1206
RMG 1/8W 220K 5% 1206
RMG 1/8W 47K 5% 1206
RMG 1/8W 470K 5% 1206
RMG 1/8W 6.8K 5% 1206
RMG 1/8W 820R 5% 1206
DIODE LL4148 SM
TR 3906 PNP SM
TR 3904 HFE 100-300 SM
TR KST42
1
1
1
1
1
1
2
2
1
2
1
1
1
2
15
3
4
1
C115
C114
R128
R129
R8
R26
R25, R124
R3, R6
R10
R18, R27
R125
R15
R19
R130, R132
D2–D7, D9, D14, D104, D111–D116
Q4, Q6, Q7
Q8, Q9, Q101, Q102
Q1
CM 50V 0.15UF 5% RL
CM 50V 0.022UF 5% RL
CM 50V 0.22UF 5% RL
CM 50V 3300pF 5% RL 6x12
CM 250V 0.068u 5% RL
CE 25V 100uF 20% RL 6x12
CE 25V 220uF 20% RL
CE 50V 10¦F 20% RL
SPRNG COIL 2uH(14gaWIRE)
8 PIN IC SOCKET DIP
IC-NE5532 OPER. AMP PHIL
LED 04mm RED W/STAND
LED 04mm YELLOW W/STAND
RMF 3W 0.22R 10% RL RGC3
RMF 5W 1K 5% AL METAL
RMF 5W 12R 5% AL METAL
RMF 5W 3K 5% AL METAL
RMF 1/2W 11.3K 1% AT
RMF 1/2W 13.3K 1% AT
RMF 1W 22R 5% AT FP
RMF 1W 6.8R 5% AL METAL
RMF 2W 5.6R 5% AL METAL
VR V012CPH, D-SHAFT 10K
SVR H6 100R RH0615C
SVR 2.2K H3 7X7.6 R0615C
DIODE IN4004 AL
DIODE IN4934 AT
DZ 1/2W 5.5-5.8V AT
DZ 1W 15V AT TEMIC
TR MJE15032
TR MJE25033
TR 2SC5200 T0-3P (L)
TR 2SA1943 T0-3P (L)
CE 100V 3300u 20% 25X50
4
2
2
2
1
2
4
2
1
2
2
2
2
8
2
2
2
1
2
2
3
1
2
1
2
4
2
2
4
1
1
4
4
4
C108, C109, C208, C209
C216, C219
C107, C207
C217, C218
C224
C105, C205
C112, C113, C212, C213
C106, C206
L200
REF: U101, U201
U101, U201
LD100, LD200
LD101, LD201
R242, R243, R248, R249, R252, R253, R256, R259
R257, R258
R261, R262
R233, R235
R123
R122, R222
R236, R237
R20, R246, R247
R260
R112, R212
R231
R239, R240
D10, D13, D217, D218
D208, D209
D207, D210
D100, D101, D200, D201
Q205
Q206
Q204, Q208, Q210, Q212
Q203, Q207, Q209, Q211
C220–C223
Channel 1 SMT parts
150F-222K-6-CF
150H-102J-6-CF
4720-103J-J
4720-152J-J
4720-202J-J
4720-224J-J
4720-470J-J
4721-105J-6
4721-154J-6
4721-224J-6
4721-473J-6
4721-474J-6
4721-682J-6
4721-821J-6
4804-1480-3
4853-9060-3
4860-0640-3
4860-5110-3
Channel 2 module
153F-154J-5-NLM
153F-223J-5-LQ
153F-224J-5-NLM
153F-332J-5-KW
153R-683J-5-WWM
157E-107M-5-KW
157E-227M-5-PU
157F-106M-5-LUN
1804-1040-0
2101-1991-0
3130-2430-0
3700-4529-R
3700-4530-Y
471A-022K-5-N
471B-102J-1-X
471B-120J-1-X
471B-302J-1-X
4717-1132-2
4717-1332-2
4718-220J-2-P
4718-6R8J-1-X
4719-5R6J-1-X
4750-6200-0
4756-1016-3-06
4756-2226-3-06
4804-0040-1
4804-9340-2
4837-5B10-2
4838-15V6-2
4860-5020-5
4860-5030-5
4860-5050-5
4860-5060-5
8910-0272-0
RMX Series Technical Service Manual
19
Channel 2 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
8910-0274-0
8910-0488-0
THERMAL PTC 60C 100 ohm
ROD THERMISTOR NTC 50ohm
1
1
R4
R234
CER2 1206 X7R 50V 100N
CC 50V 180P 10% 0805
CC 50V 2200pF 10% 1206 1
CC 50V 56pF 10% 0805 1.2
CC 100V 0.001U 5% 1206
CTC 0/30 56P 5% 1206
IC NE5517D
RMG 1/10W 100R 5% 0805
RMG 1/10W 1K 5% 0805
RMG 1/10W 10K 1% 0805
RMG 1/10W 10K 5% 0805
RMG 1/10W 1.5K 5% 0805
RMG 1/10W 20K 1% 0805
RMG 1/10W 270R 5% 0805
RMG 1/10W 3.3K 5% 0805
RMG 1/10W 39K 5% 0805
RMG 1/10W 47R 5% 0805
RMG 1/10W 4.7K 5% 0805
RMG 1/10W 7.5K 5% 0805
RMG 1/8W 150K 1% 1206
RMG 1/8W 150K 5% 1206
RMG 1/8W 33K 5% 1206
RMG 1/8W 47K 5% 1206
RMG 1/8W 499K 1% 1206
RMG 1/8W 820R 5% 1206
DIODE LL4148 SM
TR 3906 PNP SM
TR 3904 HFE 100-300 SM
3
4
1
2
1
2
1
6
3
8
3
1
4
6
1
2
1
2
2
4
2
2
1
2
4
15
2
2
C100, C102, C104
C101, C103, C201, C203
C215
C110, C210
C214
C111, C211
U10
R109, R110, R127, R209, R211, R227
R102, R126, R202
R100, R101, R105, R106, R200, R201, R205, R206
R103, R203, R228
R229
R117, R121, R217, R221
R111, R113, R120, R210, R213, R220
R24
R107, R207
R224
R114, R214
R108, R208
R118, R119, R218, R219
R104, R204
R22, R23
R225
R116, R216
R115, R215, R230, R232
D102, D103, D105, D106, D202–D206, D211–D216
Q100, Q200
Q201, Q202
CC 50V 470pF 5% RL 8x3.5
XLR FEMALE CONN.
PHONE JACK 1/4" 6.4 mm
10 POLE DIP SWITCH
26 PIN IEC RIBBON CABLE
4
2
2
1
1
C1, C2, C3, C4
J101, J201
J102, J202
SW1
J1
SPEAKON NEUTRIK 4 WIRE
4-POLE SPEAKER TERMINAL
OUTPUT POST PLUG FOR CE
OUTPUT POST PLUG FOR CE
2
1
2
2
J100, J200
J103
For European models only
For European models only
Channel 2 SMT Parts
150F-104K-6-CF
150F-181K-J-BD
150F-222K-6-CF
150F-560K-J-BD
150H-102J-6-CF
15CG-560J-6-CF
3131-9730-0
4720-101J-J
4720-102J-J
4720-103A-J
4720-103J-J
4720-152J-J
4720-203A-J
4720-271J-J
4720-332J-J
4720-393J-J
4720-470J-J
4720-472J-J
4720-752J-J
4721-154A-6
4721-154J-6
4721-333J-6
4721-473J-6
4721-4993-6
4721-821J-6
4804-1480-3
4853-9060-3
4860-0640-3
Input Board
150F-471J-5-OF
2113-1337-1
2113-1652-0
5200-4713-0
7010-9860-0
Output Board
2113-1336-1
2113-1338-0
4154-2111-0
4154-2121-0
20
QSC Audio Products, Inc.
6.3 RMX 2450 Replacement Parts
QSC part #
Description
Qty.
Notes or Component Reference
POWER TRANSFORMER, 1800
AC INLET
METAL WIND GUIDE
FAN GUIDE
ROCKER POWER SWITCH
CIRCUIT BREAKER 15A
CIRCUIT BREAKER 8A
AC CORD SET 15A
POWER CORD SET CE
DC FAN 24V 80X80 (+5V)
1
1
1
1
1
1
1
1
1
1
RCF 1/8W 2K 5% ATS
RCF 1/8W 470K 5% ATS
RCF 1/8W 6.8K 5% ATS
CM 250V 0.22uF 10% RL
CM 400V 0.047UF 10% RL
CE 35V 1000UF 20% RL
IC 4N29
RMF 2W 120R 5% AL METAL
RMF 5W 12R 5% AL METAL
DIODE RECT 1A 200V DB103
BRIDGE RECTIFIER 400V
TR TIP31C SAMSUNG
HEATSINK
HEATSINK FOR RECTIFIER
POLYSWITCH 0.15 ohm 1.1A
THERMAL NTC 30A 1 ohm
1
1
2
4
1
1
1
1
2
1
4
1
1
4
1
1
R13
R12
R9, R14
C127, C128, C227, C228
C10
C6
U2
R17
R28, R29
BR1
BR100, BR101, BR200, BR201
Q3
REF: Q3
REF: BR100, BR101, BR200, BR201
R1
R21
CM 50V 0.15UF 5% RL
CM 50V 0.022UF 5% RL
CM 50V 0.22UF 5% RL
CM 50V 3300pF 5% RL 6x12
CM 100V 0.001U 5% RL 5X
CM 250V 0.1u 5% RL
CM 250V 0.0015UF 5% RL
CM 250V 0.068u 5% RL
CE 16V 100UF 20% RL 8X11
CE 16V 47u 20% RL 6.5X11
CE 25V 100uF 20% RL 6x12
CE 25V 22uF 20% RL 5X11
CE 25V 220uF 20% RL
CE 35V 10uF 20% RL 5x11
SPRING COIL 2uH (14gaWIRE)
8 PIN IC SOCKET DIP
26 PIN DUAL ROW IEC
13 PIN WAFER P2.0 ST.
IC-NE5532 OPER. AMP PHIL
LED 04mm RED W/STAND
LED 04mm YELLOW W/STAND
FUSE HOLDER (DIA.6.3MM
RMF 1/4W 10R 5% AT
RMF 1/4W 100R 5% AT
RMF 1/2W 23.2K 1% AT
RMF 1W 12K 5% AT METAL
4
2
2
2
2
2
1
2
2
2
4
1
4
1
1
2
1
1
2
2
2
2
1
1
3
2
C108, C109, C208, C209
C116, C119
C107, C207
C172, C179
C131, C231
C174, C175
C114
C124, C126
C125, C225
C106, C206
C105, C173, C180, C205
C129
C112, C113, C212, C213
C171
L100
REF: U101, U201
J103
J104
U101, U201
LD100, LD200
LD101, LD201
F100
R163
R164
R122, R123, R222
R177, R194
Misc.
1806-2507-0
2113-1144-0
4134-9101-0
4154-0361-0
5200-4717-0
5200-3531-0
5200-4731-0
7010-9640-0
7009-8620-0
8900-9050-1
For 120V models
For 230V models
For 120V models
For 230V models
AC Board
4701-202J-C
4701-474J-C
4701-682J-C
153R-224K-5-Y1
153T-473K-5-WS
157Q-108M-5-X9E
3130-9270-0
4719-121J-1-X
471B-120J-1-X
4840-1760-0
4840-2150-0
4860-2620-5
5400-0831-0
5400-1831-1
8910-0273-0
8910-0275-0
Channel 1 module
153F-154J-5-NLM
153F-223J-5-LQ
153F-224J-5-NLM
153F-332J-5-KW
153H-102J-5-IQ
153R-104J-5-YRM
153R-152J-5-XQ
153R-683J-5-WWM
157D-107M-5-OUN
157D-476M-5-LUN
157E-107M-5-KW
157E-226M-5-IUN
157E-227M-5-PU
157Q-106M-5-IU
1804-1040-0
2101-1991-0
2101-2081-0
2102-130S-003
3130-2430-0
3700-4529-R
3700-4530-Y
4134-8851-0
4715-100J-2
4715-101J-2
4717-2322-2
4718-123J-2-X
RMX Series Technical Service Manual
21
Channel 1 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
4718-153J-2-X
4718-220J-2-P
4718-3R3J-1-X
4719-1R5J-1-X
4719-5R6J-1-X
471A-022K-5-N
471B-120J-1-X
471B-222J-1-X
471B-512J-1-X
471B-822J-1-X
4750-6200-0
4756-1016-3-06
4756-2226-3-06
4804-0040-1
4804-9340-2
4837-3B20-2
4837-5B10-2
4838-10V6-2
4838-12V6-2
4838-15V6-2
4840-2190-0
4860-5020-5
4860-5030-5
4860-5050-5
4860-5060-5
4860-5250-5
490F-Z440-5
5120-0501-0
8910-0274-0
8910-0482-0
8910-0488-0
8910-0494-0
RMF 1W 15K 5% AT METAL
RMF 1W 22R 5% AT FP
RMF 1W 3.3R 5% AL
RMF 2W 1R5 5% AL METAL
RMF 2W 5.6R 5% AL METAL
RMF 3W 0.22R 10% RL RGC3
RMF 5W 12R 5% AL METAL
RMF 5W 2.2K 5% AL METAL
RMF 5W 5.1K 5% AL METAL
RMF 5W 8.2K 5% AL METAL
VR V012CPH, D-SHAFT 10K
SVR H6 100R RH0615C
SVR 2.2K H3 7X7.6 R0615C
DIODE IN4004 AL
DIODE IN4934 AT
DZ 1/2W 3.8-4.0V AT
DZ 1/2W 5.5-5.8V AT
DZ 1.3W 10V AT TEMIC
DZ 1W 12V AT TEMIC
DZ 1W 15V AT TEMIC
DIODE MUR1520 15A 200V
TR MJE15032
TR MJE15033
TR 2SC5200 T0-3P (L)
TR 2SA1943 T0-3P (L)
TR 2N5064 TRIODE
FET IRFZ44 TO-220 60V
FUSE T25A/125V 6.4X32MM
THERMAL PTC 60C 100 ohm
TRIAC 600V 40A MAC224A8
ROD THERMISTOR NTC 50ohm
CE 63V 12000uF 20% RL
1
2
3
2
1
8
4
3
2
4
2
1
2
4
2
1
2
1
1
4
2
1
1
4
4
2
2
1
1
1
1
4
R165
R136, R137
R146, R147, R20
R181, R182
R160
R142, R143, R148, R149, R152, R153, R156, R159
R154, R155, R161, R162
R157, R158, R198
R180, R188
R118, R119, R133, R135
R112, R212
R131
R139, R140
D10, D12, D117, D118
D108, D109
D170
D107, D110
D174
D178
D100, D101, D200, D201
D175, D176
Q105
Q106
Q104, Q108, Q110, Q112
Q103, Q107, Q109, Q111
D119, D120
Q170, Q174
F100
R4
Q113
R134
C120–C123
CC 50V 100pF 5% 0805 1.2
CC 50V 100P 10% 0805
CC 50V 0.01uF 20% 0805 1
CC 50V 0.1uF 20% 1206 1.
CC 50V 180P 10% 0805
CC 50V 2200pF 10% 1206 1
CC 50V 47pF 5% 0805 1.2x
CTC 0/30 27P 5% 1206
IC LM311M VOLTAGE
IC NE5517D
RMG 1/10W 100R 5% 0805
RMG 1/10W 1K 5% 0805
RMG 1/10W 10K 1% 0805
RMG 1/10W 10K 5% 0805
RMG 1/10W 12K 5% 0805
RMG 1/10W 1.5K 5% 0805
RMG 1/10W 2K 5% 0805
RMG 1/10W 2.2K 5% 0805
RMG 1/10W 24K 5% 0805
RMG 1/10W 270R 5% 0805
RMG 1/10W 3.01K 1% 0805
RMG 1/10W 390R 5% 0805
RMG 1/10W 39K 5% 0805
RMG 1/10W 47R 5% 0805
1
1
1
2
4
1
5
2
2
1
6
3
8
3
1
1
2
1
4
4
2
2
2
2
C130
C132
C181
C104, C178
C101, C103, C201, C203
C115
C110, C170, C176, C177, C210
C111, C211
U170, U171
U10
R109, R110, R127, R209, R210, R227
R102, R126, R202
R100, R101, R105, R106, R200, R201, R205, R206
R103, R128, R203
R176
R129
R190, R195
R191
R117, R121, R217, R221
R113, R196, R213, R296
R24, R175
R120, R220
R107, R207
R170, R189
Channel 1 SMT parts
150F-101J-J-BD
150F-101K-J-BD
150F-103M-J-BD
150F-104M-6-CF
150F-181K-J-BD
150F-222K-6-CF
150F-470J-J-BD
15CG-270J-6-CF
3130-9240-0
3131-9730-0
4720-101J-J
4720-102J-J
4720-103A-J
4720-103J-J
4720-123J-J
4720-152J-J
4720-202J-J
4720-222J-J
4720-243J-J
4720-271J-J
4720-3011-J
4720-391J-J
4720-393J-J
4720-470J-J
22
QSC Audio Products, Inc.
Channel 1 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
4720-472J-J
4720-473J-J
4720-474J-J
4720-592A-J
4720-750J-J
4720-752J-J
4720-821J-J
4721-101J-6
4721-154J-6
4721-4643-6
4721-473J-6
4721-683A-6
4721-821J-6
4721-824J-6
4804-1480-3
4853-9060-3
4860-0640-3
RMG 1/10W 4.7K 5% 0805
RMG 1/10W 47K 5% 0805
RMG 1/10W 470K 5% 0805
RMG 1/10W 5.9K 1% 0805
RMG 1/10W 75R 5% 0805
RMG 1/10W 7.5K 5% 0805
RMG 1/10W 820R 5% 0805
RMG 1/8W 100R 5% 1206
RMG 1/8W 150K 5% 1206
RMG 1/8W 464K 1% 1206
RMG 1/8W 47K 5% 1206
RMG 1/8W 68K 1% 1206
RMG 1/8W 820R 5% 1206
RMG 1/8W 820K 5% 1206
DIODE LL4148 SM
TR 3906 PNP SM
TR 3904 HFE 100-300 SM
8
1
2
2
1
2
2
1
6
3
1
4
4
2
18
4
4
R114, R138, R174, R179, R187, R193, R214, R238
R183
R172, R185
R171, R184
R124
R108, R208
R111, R211
R197
R104, R173, R178, R186, R192, R204
R166, R167, R266
R125
R22A, R22B, R23A, R23B
R115, R130, R132, R215
R116, R216
D102–D106, D111–D116, D171, D173, D177, D202, D203, D205, D206
Q100, Q172, Q175, Q200
Q101, Q102, Q171, Q173
CM 50V 0.022UF 5% RL
CM 50V 3300pF 5% RL 6x12
CM 250V 0.1u 5% RL
CM 250V 0.0015UF 5% RL
CM 250V 0.068u 5% RL
CE 25V 100uF 20% RL 6x12
CE 25V 22uF 20% RL 5X11
CE 50V 47uF 20% RL
CE 35V 10uF 20% RL 5x11
CE 250V 4.7u 20% RL
SPRNG COIL 2uH(14gaWIRE)
3 PIN ST. WAFER
13 PIN WAFER P2.0 ST.
LED 04mm GREEN W/STAND
FUSE HOLDER (DIA.6.3MM
RMF 1/4W 10R 5% AT
RMF 1/4W 100R 5% AT
RMF 1W 12K 5% AT METAL
RMF 1W 15K 5% AT METAL
RMF 1W 22R 5% AT FP
RMF 1W 3.3R 5% AL
RMF 2W 1R5 5% AL METAL
RMF 2W 33K 5% AT METAL
RMF 2W 5.6R 5% AL METAL
RMF 3W 0.22R 10% RL RGC3
RMF 5W 12R 5% AL METAL
RMF 5W 2.2K 5% AL METAL
RMF 5W 5.1K 5% AL METAL
RMF 5W 8.2K 5% AL METAL
SVR H6 100R RH0615C
SVR 2.2K H3 7X7.6 R0615C
DIODE IN4004 AL
DIODE IN4934 AT
DZ 1/2W 3.8-4.0V AT
DZ 1/2W 5.5-5.8V AT
DZ 1.3W 10V AT TEMIC
DZ 1W 12V AT TEMIC
DZ 1W 15V AT TEMIC
DIODE MUR1520 15A 200V
2
2
2
1
2
2
1
1
1
1
1
1
1
1
2
1
1
2
1
2
2
2
2
1
8
4
3
2
4
1
2
5
2
1
2
1
1
2
2
C216, C219
C272, C279
C274, C275
C214
C224, C226
C273, C280
C229
C8
C271
C7
L200
J257
J204
LD1
REF: F200
R263
R264
R277, R294
R265
R236, R237
R246, R247
R281, R282
R2, R5
R260
R242, R243, R248, R249, R252, R253, R256, R259
R254, R255, R261, R262
R257, R258, R298
R280, R288
R218, R219, R233, R235
R231
R239, R240
D1, D11, D13, D217, D218
D208, D209
D270
D207, D210
D274
D278
D8, D15
D275, D276
Channel 2 module
153F-223J-5-LQ
153F-332J-5-KW
153R-104J-5-YRM
153R-152J-5-XQ
153R-683J-5-WWM
157E-107M-5-KW
157E-226M-5-IUN
157F-476M-5-LU
157Q-106M-5-IU
157R-475M-5-OV
1804-1040-0
2102-031S-004
2102-130S-003
3700-4531-G
4134-8851-0
4715-100J-2
4715-101J-2
4718-123J-2-X
4718-153J-2-X
4718-220J-2-P
4718-3R3J-1-X
4719-1R5J-1-X
4719-333J-2-X
4719-5R6J-1-X
471A-022K-5-N
471B-120J-1-X
471B-222J-1-X
471B-512J-1-X
471B-822J-1-X
4756-1016-3-06
4756-2226-3-06
4804-0040-1
4804-9340-2
4837-3B20-2
4837-5B10-2
4838-10V6-2
4838-12V6-2
4838-15V6-2
4840-2190-0
RMX Series Technical Service Manual
23
Channel 2 module (continued)
QSC part #
Description
Qty.
Notes or Component Reference
4860-5020-5
4860-5030-5
4860-5050-5
4860-5060-5
4860-5250-5
4860-8890-0
490F-Z440-5
5120-0501-0
8910-0274-0
8910-0482-0
8910-0488-0
8910-0494-0
TR MJE15032
TR MJE15033
TR 2SC5200 T0-3P (L)
TR 2SA1943 T0-3P (L)
TR 2N5064 TRIODE
TR MPS A06 VCE 80V NS
FET IRFZ44 TO-220 60V
FUSE T25A/125V 6.4X32MM
THERMAL PTC 60C 100 ohm
TRIAC 600V 40A MAC224A8
ROD THERMISTOR NTC 50ohm
CE 63V 12000uF 20% RL
1
1
4
4
2
1
2
1
1
1
1
4
Q205
Q206
Q204, Q208, Q210, Q212
Q203, Q207, Q209, Q211
D219, D220
Q5
Q270, Q274
F200
R7
Q213
R234
C220–C223
CC 50V 100P 10% 0805
CC 50V 0.01uF 20% 0805 1
CC 50V 0.1uF 20% 1206 1.
CC 50V 0.1uF 20% 0805 1.
CC 50V 2200pF 10% 1206 1
CC 50V 47pF 5% 0805 1.2x
IC LM311M VOLTAGE
RMG 1/10W 10K 5% 0805
RMG 1/10W 12K 5% 0805
RMG 1/10W 1.5K 5% 0805
RMG 1/10W 2K 5% 0805
RMG 1/10W 2.2K 5% 0805
RMG 1/10W 3.01K 1% 0805
RMG 1/10W 47R 5% 0805
RMG 1/10W 4.7K 5% 0805
RMG 1/10W 47K 5% 0805
RMG 1/10W 470K 5% 0805
RMG 1/10W 5.9K 1% 0805
RMG 1/10W 75R 5% 0805
RMG 1/8W 100R 5% 1206
RMG 1/8W 1M 5% 1206
RMG 1/8W 150K 5% 1206
RMG 1/8W 220K 5% 1206
RMG 1/8W 330K 5% 1206
RMG 1/8W 464K 1% 1206
RMG 1/8W 47K 5% 1206
RMG 1/8W 6.8K 5% 1206
RMG 1/8W 820R 5% 1206
DIODE LL4148 SM
TR 3906 PNP SM
TR 3904 HFE 100-300 SM
TR KST42
1
1
1
1
1
3
2
1
1
1
3
1
1
3
4
1
2
2
1
1
2
5
2
1
1
1
1
2
18
5
6
1
C9
C281
C278
C11
C215
C270, C276, C277
U270, U271
R228
R276
R229
R8, R290, R295
R291
R275
R25, R270, R289
R274, R279, R287, R293
R283
R272, R285
R271, R284
R224
R30
R3, R6
R10, R273, R278, R286, R292
R18, R26
R27
R15
R225
R19
R230, R232
D2–D7, D9, D14, D204, D211–D216, D271, D273, D277
Q4, Q6, Q7, Q272, Q275
Q8, Q9, Q201, Q202, Q271, Q273
Q1
CC 50V 470pF 5% RL 8x3.5
XLR FEMALE CONN.
PHONE JACK 1/4" 6.4 mm
10 POLE DIP SWITCH
26 PIN IEC RIBBON CABLE
4
2
2
1
1
C1, C2, C3, C4
J101, J201
J102, J202
SW1
J1
SPEAKON NEUTRIK 4 WIRE
4-POLE SPEAKER TERMINAL
OUTPUT POST PLUG FOR CE
OUTPUT POST PLUG FOR CE
2
1
2
2
J100, J200
J103
For European models only
For European models only
Channel 2 SMT Parts
150F-101K-J-BD
150F-103M-J-BD
150F-104M-6-CF
150F-104M-J-BD
150F-222K-6-CF
150F-470J-J-BD
3130-9240-0
4720-103J-J
4720-123J-J
4720-152J-J
4720-202J-J
4720-222J-J
4720-3011-J
4720-470J-J
4720-472J-J
4720-473J-J
4720-474J-J
4720-592A-J
4720-750J-J
4721-101J-6
4721-105J-6
4721-154J-6
4721-224J-6
4721-334J-6
4721-4643-6
4721-473J-6
4721-682J-6
4721-821J-6
4804-1480-3
4853-9060-3
4860-0640-3
4860-5110-3
Input Board
150F-471J-5-OF
2113-1337-1
2113-1652-0
5200-4713-0
7010-9860-0
Output Board
2113-1336-1
2113-1338-0
4154-2111-0
4154-2121-0
24
QSC Audio Products, Inc.
8
7
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
6
5
4
3
2
1
REVISIONS
7. Schematics and diagrams
PWR PCB
REV
A
00
CHK
APPROVED DATE
00
00
WASHER
EFF DATE
SCREW
4 REQD
D
INPUT PCB
DESCRIPTION
XX
SCREW
8 REQD
D
00
00
00 HEX NUT
FAN
00
00
FLAT WASHER
C
C
00
TOROID
CHASSIS
SCREW
2 REQD
B
HEX NUT
2 REQD
SWITCH
00
00
00
B
RACK EAR
2 REQD
DWG NO.
00
PA-002450-00
SCREW
4 REQD
00
00 OUTPUT PCB
SH
1
REV
00
00
SCREW
FAN GUARD
A
00
SCREW
4 REQD
00
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
00 SCREW
2 REQD
TOLERANCES ARE:
DECIMALS
DECIMALS
.xx ± .02
.xxx ± .010
DEBURR EDGES .XXX R MAX
THIS DRAWING USED IN CONJUNCTION WITH SCHEMATIC DWGs MAIN PCB SH-002451,
INPUT PCB XO,
WIRING DIAGRAM SH-002450-00 AND FINAL ASSY PF-002450-00.
7.1 RMX Assembly/Disassembly Diagram 1 of 2
(All models)
NOTES: UNLESS OTHERWISE SPECIFIED
8
RMX Series Technical Service Manual
7
6
A
PARTS LIST
00 PWR CONNECTOR
SCREW
2 REQD
4
COSTA MESA, CALIFORNIA
ANGLES
±1/2
MATERIAL
APPROVALS
DRAWN
DATE
MILA P.
CHASSIS ASSY
RMX 2450
12-07-2000
CHECKED
SEE TABULATION BLOCK
X
RMX 2450
NEXT ASSY
USED ON
FINISH
ISSUED
3
DWG NO.
D
SCALE
DO NOT SCALE DRAWING
APPLICATION
5
AUDIO PRODUCTS, INC.
2
PA-002450-00
SHEET
1/2
REV
1 OF 2
1
25
8
7
6
5
4
3
2
1
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
SCREW
5 REQD
D
D
SCREW
6 REQD
C
C
B
B
DWG NO.
PA-002450-00
SH
KNOB
2 REQD
2
REV
CHASSIS
NUT
SCREW
4 REQD
A
A
WIRE ASSY
7.2 RMX Assembly/Disassembly Diagram 2 of 2
(All models)
8
26
7
6
DWG NO.
D
SCALE
5
4
3
2
PA-002450-00
SHEET
1/2
REV
2 OF 2
1
QSC Audio Products, Inc.
7
8
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
5
6
2
3
4
1
D
18
FILT SEND B (POT)
19
FILT CAP B
20
SW1:8
8
FILTER BYPASS B (8)
18
SW1:9
9
19
FILTER 30 HZ (9)
GND 21
SW1:10
10
CLIP LIM B (10)
CLIP LIM B
22
20
GND
23
-IN B
24
+IN B
25
GND
26
J1:17
J203:17
J1:18
J203:18
J1:19
J203:19
J1:20
J203:20
J1:21
J203:21
J1:22
J203:22
J1:23
J203:23
J1:24
J203:24
J1:25
J203:25
J1:26
J203:26
15
16
BR_BAL
19
20
F_BYP_B
F_30_B
-14V
C100
220-25V
R152
0.22-3W
R148
0.22-3W
R142
0.22-3W
4
4
J204:4
J104:4
L100
.022
R158
2uH
820-5W
C124
.068-5%
250V
JP14
E100
BR-POS
2+
SPEAKON
BR-NEG
JP13
E101
4700-80V
D115
1+
5-WAY
BINDING
POST
CH A
R162
12-5W
2-
J103 +
R161
12-5W
C121
Q106
MJE15033
CHANNEL 1
SPEAKER OUTPUT PCB
J100
D113
1N4148
CW
CCW
CCW
820-5W
1-
D112
C115
CLIP CH 1
C119
R147
6.8-1W
C118
.0033
WIRES TO
BREAK-AWAY
SPEAKER
OUTPUT PCB
5.6-2W
R157
P1
POS
CURRENT
W LIMIT
D110
5.6V-.25W
J103 -
P1
1N4148
Q104
2SC5200
P1
SEE SH 3
R146
6.8-1W
NEG
CURRENT
LIMIT
CW
8
D109
CW
R134
50
NTC
R133
2.0K-5W
C111
P1
C116
.022
R140
2.2K
C
R160
D114
1N4148
TH_A
Q108
2SC5200
Q110
2SC5200
P1
R137
22-1W
FP
D118
1N4004
B
56p-200V-COG
^C_1206
-VCC_A
-67V
SEE SH 3
CLIP_B
23
25
1N4148
100
BIAS
CCW
R121
10
^R_0805
0.1-50V 10%
^C_1206
D106
W
10
A1
24
20.0K
^R_0805
R117
20.0K
^R_0805
4.7K
^R_0805
R108
R114
J204:10
D103
^R_1206
+VCC_A
270
F_SND_B
21
22
J104:10
A1
R111
17
18
7.50K
^R_0805
^C_1206
BR_CUT
1N4148
SPEAKER CONNECTORS
ON BREAK-AWAY PCB.
CONTINUED, SHEET 2
C117
.0033
W
R139
2.2K
4700-80V
R126
-IN_B
A1
+IN_B
1K
^R_0805
R120
R122
270
10.0K-1%-1/2W
^R_0805
DWG NO.
FILT BYP B
J203:16
-15V_A
1N4148
C120
Q105
MJE15032
J104:11
11
R123
J204:11
11
9.09K-1%-1/2W
26
SH-000850-00
17
17
J203:15
J1:16
C104
.1-50V-10%
3906
D116
33K
^R_1206
SW1:7
7
J1:15
^U_LM13600
14
Q100
J104:6
LD100
RED
C113
4
-
6
P1
15V-1W
R115
820
J204:6
R22
16
BR_RET
A1
2
D105
R131
D100
P1
6
R153
0.22-3W
15
BR MONO FEED
13
Q109
2SA1943
R149
0.22-3W
16
J203:14
5
Q107
2SA1943
R143
0.22-3W
BR M SEND (HI-SIG A)
SW1:6
6
BRIDGE
MONO
(6, 7)
J1:14
12
U101:2
NE5532
3
+
7
+
D102
R127
GND 14
15
J203:13
U10:1
LM13600M
BR MONO FEED
-
7
150K
^R_1206
SW1:5
5
J1:13
.15-5%
R118
13
J203:12
11
.15-5%
J204:7
7
6
150K
^R_1206
12
J1:12
10
D117
1N4004
1N4148
J104:7
7
^C_0805
R119
14
J203:11
^C_1206
100
^R_0805
GND
SW1:4
4
PARALLEL
INPUTS
(4, 5)
J203:10
J1:11
10%
9
R110
13
J1:10
0.1-50V
100
^R_0805
3
FILTER BYPASS A (3)
11
P1
R109
GND 10
C102
8
R107
12
SW1:3
J203:9
C109
5
39K
^R_0805
2
FILTER 30 HZ (2)
9
J203:8
J1:9
+14V
7
C105
FILT-BYP A
SW1:2
J1:8
SEE SH 3
6
100-25V
8
J203:7
150K
^R_1206
11
J203:6
J1:7
11
FILT-SEND A
SW1:1
1
CLIP LIM A (1)
J1:6
R104
7
1
6
C108
SW TO GND FOR CLIP LIM
5
6
GND
FILT-CAP A
J203:5
R103
1
J1:5
10.0K
^R_0805
5
8
CLIP-LIM A
Q103
2SA1943
D107
5.6V-.25W
56p
3
1N4148
R130
820
^R_1206
C110
FILT-BYP A
2
B
P1
15V-1W
.22-5%
S
J201
J204:5
1N4148
^C_1206
D101
C107
FILT-SEND A
TIP T
C112
220-25V
FILT-CAP A
1
MODEL R116
700
383K
1200
499K
10K LINEAR 3B
RIGHT ANGLE POT
^C_0805
5
+VCC_A
FP
SIG CH 1
270
^R_0805
A1
180p-5%
J104:5
^C_1206
C103
R136
22-1W
LD101
YELLOW
+15V_A
R113
+67V
5
0.0022u, 10%
10K
3904
P1
D108
R112
10.0K
^R_0805
Q102
1N4148
1N4934
A1
^R_0805
R132
4
^R_0805
D111
J203:4
2.0K-5W
D104
CHANNEL 1 GAIN
W
R135
1.5K
100
^R_0805
J1:4
R106
R129
10K
1N4934
^R_0805
R128
820
^R_1206
10.0K
10-50NP
-
2
^R_1206
SP_A
1
^R_0805
J204:13
Q101
3904
C106
+
3
1K
R101
3
NC 13
R125
47K
^C_1206
J203:3
RING R
J202
^R_0805
R102
J104:13
C114
C3
470p 5%
C4
470p 5%
^C_1206
2
J1:3
NC 13
J104:12
4
C
^C_1206
470p 5%
C1
J5:1
CH2_+IN
4
GND
C2
J5:2
3
^C_1206
-IN A
4
470p 5%
FIVE POSITION BARRIER STRIP
5
A1
NE5532
U101:1
10.0K
^R_0805
CHASSIS_GND
CH2_-IN
10.0K
R100
2
NC 12
R105
0.001u, 100V 5%
J203:2
^C_0805
1
D
47
^R_0805
J1:2
J203:1
R124
+IN A 2
J1:1
R116
1
S
3
3-10-00
APPROVED / DATE
J204:12
390K
^R_1206
TIP
T
J5:3
CLEAN UP BY AA
CHK
12
P1
CW
GND
RING
R
J5:4
R20
6.8-1W
A1
CCW
1
CH1_-IN
3-01-00
1N4148
C101
180p-5%
3
CH1_+IN
PROTOTYPE RELEASE
ROUTE THIS GROUND
TO "P" GND AT
HEAT SINK COMMON
BETWEEN CH A AND CH B
ROUTE THIS GROUND
TO "A" GND AT
JI-2 INPUT CABLE
2
J5:5
EFF. DATE
CHANNEL-1
26-LINE RIBBON CABLE
CONNECTS BREAKAWAY
INPUT PCB TO MAIN PCB
J102
DESCRIPTION
2
3
J101
1
REVISION
REV
SP_A
R24
BR_BAL
^R_0805
P1
SH
33K
^R_1206
R23
3.3K
4
REV
1
SP_B
A
Gray shading indicates
signal path
QTY
ITEM NO.
PART NO.
A
AUDIO PRODUCTS, INC.
DIMENSIONS ARE IN INCHES.
5. J104, J204 ARE CONNECTED PIN TO PIN BY 13-LINE RIBBON CABLE.
DIMENSIONS PER ANSI Y14.5-1982
4. PART NUMBERING SCHEME
PARTS IN COMMON TO BOTH CH: 1-99. CH 1 PARTS 101-199, CH 2 PARTS 201-299.
3. COMPONENTS MARKED WITH ! ARE SAFETY CRITICAL PARTS.
2. COMPONENTS WITH VALUE PREFIXED WITH A "^" REPRESENT SMT COMPONENTS.
1. THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP-000851-00
7.3 RMX 850 Schematic Diagram 1 of 3
Channel 1
6
5
4
DECIMALS
DECIMALS
+
.XX -
.XXX
ANGLES
+
-
DEBURR EDGES .XXX R MAX
MATERIAL
WP-000850-00
RMX 850
NEXT ASSY
USED ON
APPLICATION
7
COSTA MESA, CALIFORNIA
TOLERANCES ARE:
NOTES: UNLESS OTHERWISE SPECIFIED
RMX Series Technical Service Manual
VENDOR
PARTS LIST
UNLESS OTHERWISE SPECIFIED
8
DESCRIPTION
CONTRACT NO.
FINISH
DO NOT SCALE DRAWING
3
O
APPROVALS
DRAWN
PAT QUILTER
SCHEMATIC DIAGRAM
DATE
2-25-00
RMX 850
CHECKED
ISSUED
CAD SEED FILE NO.
PLOT DATE:
Thu Sep 07, 2000
2
SIZE
FSCM NO.
SCALE
NONE
D
DWG NO.
REV
SH-000850-00
CAD FILE NO.
SHEET
RMX850-3.sch
P:RMXQSCRMX850
1
1
OF
3
3
PLOT DATE:
Thu Sep 07, 2000
27
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
7
6
4
5
3
2
1
8
D
D
CHANNEL-2
C201
180p-5%
R252
0.22-3W
R248
0.22-3W
2uH
R261
12-5W
C221
R262
12-5W
E201
4700-80V
D215
5-WAY
BINDING
POST
CH B
JP16
Q204
2SC5200
R237
22-1W
FP
R233
2.0K-5W
Q208
2SC5200
TO CH A
SHEET 1
BR-NEG
J203 -
P1
1N4148
SPEAKER CONNECTORS
ON BREAKAWAY PCB
FROM SHEET ONE
Q210
2SC5200
P1
B
D218
1N4004
-67V
56p-200V-COG
-14V
J203 +
250V
Q206
MJE15033
BR-POS
JP15
C224
.068-5%
820-5W
R247
6.8-1W
E200
2+
R258
SPEAKER OUTPUT
SPEAKON
.022
CHANNEL B
WIRES TO
SPEAKER
OUTPUT PCB
1+
L200
2-
820-5W
DWG NO.
R219
R232
R227
150K
^R_1206
R218
R215
820
^R_1206
C219
J200
C215
4
R221
20.0K
^R_0805
R217
R214
4.75K
^R_0805
20.0K
^R_0805
150K
^R_1206
C205
100-25V
-VCC_B
^C_1206
SEE SH 3
SH-000850-00
150K
^R_1206
R204
P1
C211
C218
.0033
5.6-2W
R257
P1
POS
CURRENT
LIMIT
D210
5.6V-.25W
CLIP CH 2
R260
R246
6.8-1W
NEG
CURRENT
LIMIT
W
R234
50
LD200
RED
-15V_B
Q200
3906
C216
.022
NTC
+VCC_B
100
^R_0805
R211
R209
100
^R_0805
16
10.0K
^R_0805
R203
9
13
R240
2.2K
W
100
P1
C213
270
1N4148
R231
BIAS
220-25V
^R_0805
D206
1N4148
14
-VCC_B
SEE SH 1
D203
D200
15V-1W
A1
1N4148
C
C220
4700-80V
C217
.0033
W
R239
2.2K
CW
U201:2
NE5532
+
15
-
1N4148
7
CCW
-
D205
8
.15-5%
6
A1
R210
B
.15-5%
D202
^C_0805
D211
+
12
C209
100
^R_0805
R207
U10:2
LM13600M
10
C208
5
39K
^R_0805
R208
+14V
7.50K
^R_0805
SEE SH 3
D209
56p
1N4148
Q205
MJE15032
1-
R230
^C_1206
C214
C210
F_BYP_B
P1
R253
0.22-3W
.22-5%
F_SND_B
Q209
2SA1943
D216
R243
0.22-3W
15V-1W
P1
Q207
2SA1943
D207
5.6V-.25W
D208
C207
0.001u, 100V 5%
D201
^C_0805
F_30_B
220-25V
47
^R_0805
R216
10K LINEAR 3B
RIGHT ANGLE POT
180p-5%
SEE SH 1
R224
C
390K
^R_1206
C212
D213
CW
^R_0805
A1
C203
1N4148
^R_0805
CW
^R_0805
Q203
2SA1943
SIG CH 2
270
D217
1N4004
FP
LD201
YELLOW
3904
CCW
10K
P1
CCW
10.0K
1N4148
+15V_B
R213
W
CW
R212
10.0K
10-50NP
D214
R206
1N4148
R201
^C_1206
-IN_B
1
-
0.0022u, 10%
^R_0805
820
^R_1206
^R_0805
1N4934
SEE SH 1
R236
22-1W
Q202
1N4934
1K
R249
0.22-3W
D204
10.0K
+VCC_B
+67V
2.0K-5W
R242
0.22-3W
C206
+
2
^R_0805
820
^R_1206
3
R235
1.5K
^R_0805
^R_1206
NE5532
U201:1
R202
CCW
R200
+IN_B
R229
10K
D212
^R_0805
R228
Q201
3904
R226
47K
A1
1N4148
R205
10.0K
1N4148
^C_0805
CLIP_B
SW-GND FOR CLIP LIM
A1
R220
R222
270
10.0K-1%-1/2W
SP_B
^R_0805
SEE SH 1
BR MONO RETURN -- CAUTION, SENSITIVE NODE
3
REV
2
SH
BR_RET
A
A
Gray shading indicates
signal path
7.4 RMX 850 Schematic Diagram 2 of 3
Channel 2
8
28
7
6
5
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
4
3
2
DWG NO.
REV
SH-000850-00
CAD FILE NO.
PLOT DATE:
Thu Sep 07, 2000
SHEET
RMX850-3.sch
3
2
OF 3
1
QSC Audio Products, Inc.
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY OF
QSC AUDIO PRODUCTS, THAT MAY NOT BE
DISCLOSED, REPRODUCED OR USED WITHOUT
EXPRESS WRITTEN CONSENT FROM QSC
AUDIO PRODUCTS.
6
4
5
RECTIFIERS BR100, 200 AND C127–227 ARE
LOCATED OFF THE MAIN PCB, MOUNTED
TO CHASSIS.
BLK
-
J8A
RED
WHT
WHT
J9A
IEC AC INLET
0V
WHT
D2
D3
1N4148
1N4148
ATTACH TO HS-2
JP12
1
+
3
R19
^R_0805
Q6
3906
-15V_A
1N4004
-14V
P1
-15V_B
C
MAINTAIN FULL
PRI-SEC CREEPAGE
J204:8
J157:2
JP10
3
200V-1A
AC2
AC1
SEE SH 1
BR1
1
J21:2
J18:1
2
+
TO DC FAN
2
J18:2
-
!
2500V
HI-POT
U2
R7
60C 100 OHM
4N29
ATTACH TO HS-1
9
J204:9
J21:1
9
J104:9
J157:1
1
4
Q3
1
TIP31C
R17
120-2W
-
GND
J104:8
8
TH_A
TO POWER SWITCH
2
8
R4
60C 100 OHM
!
1
NEUT
1N4148
2
1N4148
2
MAINTAIN FULL
PRI-SEC CREEPAGE
20 VAC TO FAN POWER RECTIFIER
R1
B
B
C6
1000-35V
3
REV
3
SH
SH-000850-00
DWG NO.
1.1 AMP
28V PRI-SIDE DC FAN SUPPLY
2
LINE
470K
BR_CUT
47
J204:1
D10
D9
^R_1206
D6
20V
!
JSW
R26
220K
^R_0805
D7
AC INPUT, LOW (ALL)
CIRCUIT BREAKER
USA: 10A-125V
EUROPE: 5A-250V
D5
1N4148
6.8K
^R_1206
AC1
2
-VCC_B
Q7
3906
J204:3
3
R25
P1
J104:3
3
1N4148
RED
BLK
E12
120V
GRY
J7A
BLU
E16
C11
.1-5OV
BR_CUT
J104:1
1
R15
Q8
3904
Q9
3904
1N4004
1
R14
RED
4
+15V_A
J104:2
1N4004
Q5
MPSW05
D11
C7
4.7-250V
1N4148
+15V_B
J204:2
D12
P1
6.81K
^R_1206
RED
-
D4
R9
WHT
+
1N4148
Q1
300V-.2A
6.81K
^R_1206
J6A
R5
15K-2W
400V-25A
D14
R13
GRY
1
Q4
2.0K
^R_0805
BLK
-
R6
1.0M
^R_1206
BR200
C227
0.22-200V
E8
R3
1.0M
^R_1206
2
2
^R_1206
R2
15K-2W
R12
-
-
E7
+VCC_B
E11
^R_1206
C8
47-50V
3906
R8
-
F200
10A-125V
COIL TWO
J5A
E10
-VCC_A
E15
E6
D
470K
^R_1206
J4A
E5
1
5
BLU
E14
D13
1N4004
P1
4
J3A
4
15V
R18
220K
R27
220K
6
J2A
-
-
+14V
D8
^R_1206
1
BRN
GRY
+
2
BRN
GRY
BLU
1
E4
0V
1N4004
PILOT
LED
20V
BLU
R10
150K
400V-25A
AC1
BRN
BLK
C127
E3
0.22-200V
COIL ONE
C
E2
AC2
240V
E9
D1
LD1
GRN
AC2
BRN
QUICK
CONNECT
PC-MTD
TABS
TRANSFORMER PRI LEADS
120V
+VCC_A
BR100
3
!
3
3
120V
E13
F100
10A-125V
AC INPUT, HIGH (ALL)
100V
3
E1
R21
1 OHM 30A
J157:3
3
AC VOLTAGE
PROGRAMMING
TERMINALS
2
MUTING AND THERMAL PROTECTION.
J21:3
U-I CORE POWER TRANSFORMER
NOTE SPLIT SECONDARY WIRING
FROM EACH LEG TO EACH CHANNEL
3
2.0K
^R_0805
7
15V
8
D15
D
A
A
7.5 RMX 850 Schematic Diagram 3 of 3
Power Supply
8
RMX Series Technical Service Manual
7
6
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
5
4
3
2
DWG NO.
REV
SH-000850-00
CAD FILE NO.
PLOT DATE:
Thu Sep 07, 2000
SHEET
RMX850-3.sch
3
3
OF 3
1
29
7
8
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
5
6
2
3
4
1
REVISION
REV
DESCRIPTION
EFF. DATE
1
PROTOTYPE RELEASE
3-01-00
2
CLEAN UP BY PHQ
3-02-00
CLEAN UP BY AA
3-10-00
CHK
APPROVED / DATE
3
4
CHANNEL-1
FILT SEND B (POT)
19
FILT CAP B
20
SW1:8
8
FILTER BYPASS B (8)
18
SW1:9
9
19
FILTER 30 HZ (9)
GND 21
SW1:10
10
CLIP LIM B (10)
CLIP LIM B
22
GND
23
20
-IN B
24
+IN B
25
GND
26
J1:17
J203:17
J1:18
J203:18
J1:19
J203:19
J1:20
J203:20
J1:21
J203:21
J1:22
J203:22
J1:23
J203:23
J1:24
J203:24
J1:25
J203:25
J1:26
J203:26
16
BR_BAL
19
20
F_BYP_B
F_30_B
-14V
R156
0.22-3W
R152
0.22-3W
R148
0.22-3W
R142
0.22-3W
CLIP CH 1
4
4
J204:4
J104:4
1K-5W
L100
.022
R158
2uH
1K-5W
C124
.068-5%
250V
C121
C123
3300-100V
3300-100V
CHANNEL 1
SPEAKER OUTPUT PCB
JP14
E100
BR-POS
R161
12-5W
2+
SPEAKON
1+
2-
5-WAY
BINDING
POST
CH 1
R162
12-5W
BR-NEG
JP13
E101
D115
J100
J103 +
1-
D112
D113
1N4148
CW
C115
CCW
CCW
CW
Q106
MJE15033
J103 -
P1
1N4148
Q104
2SC5200
P1
SEE SH 3
P1
D109
8
220-25V
C119
R147
6.8-1W
C118
.0033
WIRES TO
BREAK-AWAY
SPEAKER
OUTPUT PCB
5.6-2W
R157
P1
POS
CURRENT
W LIMIT
D110
5.6V-.25W
R133
3.0K-5W
C111
Q108
2SC5200
Q110
2SC5200
Q112
2SC5200
P1
R137
22-1W
FP
D118
56p-200V-COG
^C_1206
1N4004
B
-VCC_A
-78V
SEE SH 3
CLIP_B
23
25
NTC
TH_A
C100
R134
50
C116
.022
R146
6.8-1W
NEG
CURRENT
LIMIT
D114
R121
10
^R_0805
0.1-50V 10%
^C_1206
1N4148
100
BIAS
10
A1
24
20.0K
^R_0805
R117
20.0K
^R_0805
4.7K
^R_0805
R108
R114
J204:10
1N4148
^R_1206
+VCC_A
270
F_SND_B
21
22
J104:10
A1
R111
17
18
7.50K
^R_0805
^C_1206
BR_CUT
D106
R140
2.2K
C
R126
-IN_B
A1
+IN_B
1K
^R_0805
R120
R122
270
13.3K-1%-1/2W
^R_0805
DWG NO.
18
15
D103
W
SPEAKER CONNECTORS
ON BREAK-AWAY PCB.
CONTINUED, SHEET 2
R160
J104:11
11
R123
J204:11
11
11.3K-1%-1/2W
26
SH-001451-00
FILT BYP B
J203:16
-15V_A
1N4148
C122
3300-100V
C117
.0033
W
R139
2.2K
C120
3300-100V
R22
17
17
J203:15
J1:16
C104
.1-50V-10%
3906
Q105
MJE15032
33K
^R_1206
SW1:7
7
J1:15
^U_LM13600
14
Q100
D116
LD100
RED
C113
4
-
J104:6
P1
15V-1W
R115
820
6
R159
0.22-3W
16
BR_RET
Q111
2SA1943
R153
0.22-3W
15
BR MONO FEED
13
A1
2
1N4148
R131
D100
J204:6
R149
0.22-3W
16
J203:14
5
D105
D117
1N4004
P1
6
R143
0.22-3W
BR M SEND (HI-SIG A)
SW1:6
6
BRIDGE
MONO
(6, 7)
J1:14
12
U101:2
NE5532
3
+
7
+
D102
R127
GND 14
15
J203:13
U10:1
LM13600M
BR MONO FEED
-
7
150K
^R_1206
SW1:5
5
J1:13
.15-5%
R118
13
J203:12
11
.15-5%
J204:7
7
6
150K
^R_1206
12
J1:12
10
Q109
2SA1943
1N4148
J104:7
7
^C_0805
R119
14
J203:11
^C_1206
R110
GND
SW1:4
4
PARALLEL
INPUTS
(4, 5)
J203:10
J1:11
10%
9
100
^R_0805
13
J1:10
C109
5
0.1-50V
100
^R_0805
3
FILTER BYPASS A (3)
11
P1
R109
GND 10
C102
8
100-25V
12
SW1:3
J203:9
R107
2
FILTER 30 HZ (2)
9
J203:8
J1:9
+14V
7
39K
^R_0805
FILT-BYP A
SW1:2
J1:8
SEE SH 3
6
C105
8
J203:7
150K
^R_1206
11
J203:6
J1:7
11
FILT-SEND A
SW1:1
1
CLIP LIM A (1)
J1:6
R104
7
1
6
C108
SW TO GND FOR CLIP LIM
5
6
GND
FILT-CAP A
J203:5
R103
1
J1:5
10.0K
^R_0805
5
8
CLIP-LIM A
Q107
2SA1943
D107
5.6V-.25W
56p
3
1N4148
R130
820
^R_1206
C110
FILT-BYP A
2
B
P1
15V-1W
.22-5%
S
J201
Q103
2SA1943
1N4148
^C_1206
D101
C107
FILT-SEND A
TIP T
C112
220-25V
FILT-CAP A
1
MODEL R116
700
383K
1200
499K
10K LINEAR 3B
RIGHT ANGLE POT
^C_0805
J204:5
+VCC_A
FP
SIG CH 1
270
^R_0805
A1
180p-5%
5
^C_1206
C103
J104:5
LD101
YELLOW
+15V_A
R113
R136
22-1W
5
0.0022u, 10%
10K
3904
D108
R112
10.0K
^R_0805
Q102
P1
1N4934
A1
^R_0805
1N4148
+78V
CW
4
^R_0805
CCW
J203:4
CHANNEL 1 GAIN
W
3.0K-5W
R132
J1:4
R106
R135
1.5K
1N4934
10.0K
10-50NP
-
2
R129
10K
D104
SP_A
1
^R_0805
^R_0805
RING R
J202
C106
+
3
1K
R101
3
^R_1206
R128
D111
J203:3
J204:13
Q101
3904
100
^R_0805
^C_1206
C3
470p 5%
C4
^C_1206
J1:3
NC 13
R125
47K
4
C
2
470p 5%
J5:1
CH2_+IN
C2
J5:2
4
GND
CHASSIS_GND
CH2_-IN
^R_0805
R102
J104:13
^C_1206
3
^C_1206
C1
J5:3
3
NC 13
J104:12
C114
-IN A
4
470p 5%
J5:4
CH1_-IN
5
A1
NE5532
U101:1
10.0K
^R_0805
470p 5%
FIVE POSITION BARRIER STRIP
CH1_+IN
10.0K
R100
2
S
J5:5
NC 12
R105
0.001u, 100V 5%
+IN A 2
J203:2
^C_0805
1
47
^R_0805
TIP T
J1:2
J203:1
R124
R
J1:1
500K
^R_1206
1
J204:12
12
P1
CW
GND
CCW
1
J102
R20
6.8-1W
A1
820
^R_1206
C101
180p-5%
3
RING
ROUTE THIS GROUND
TO "P" GND AT
HEAT SINK COMMON
BETWEEN CH A AND CH B
ROUTE THIS GROUND
TO "A" GND AT
JI-2 INPUT CABLE
2
J101
D
1N4148
26-LINE RIBBON CABLE
CONNECTS BREAKAWAY
INPUT PCB TO MAIN PCB
R116
D
SP_A
R24
BR_BAL
^R_0805
P1
SH
33K
^R_1206
R23
3.3K
4
REV
1
SP_B
A
Gray shading indicates
signal path
QTY
ITEM NO.
PART NO.
A
AUDIO PRODUCTS, INC.
DIMENSIONS ARE IN INCHES.
5. J104, J204 ARE CONNECTED PIN TO PIN BY 13-LINE RIBBON CABLE.
DIMENSIONS PER ANSI Y14.5-1982
7.6 RMX 1450 Schematic Diagram 1 of 3
3. COMPONENTS MARKED WITH ! ARE SAFETY CRITICAL PARTS.
2. COMPONENTS WITH VALUE PREFIXED WITH A "^" REPRESENT SMT COMPONENTS.
Channel 1
1. THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP-001451-00
NOTES: UNLESS OTHERWISE SPECIFIED
6
5
4
DECIMALS
DECIMALS
+
.XX -
.XXX
ANGLES
+
-
DEBURR EDGES .XXX R MAX
MATERIAL
WP-001451-00
RMX 1450
NEXT ASSY
USED ON
APPLICATION
7
COSTA MESA, CALIFORNIA
TOLERANCES ARE:
4. PART NUMBERING SCHEME
PARTS IN COMMON TO BOTH CH: 1-99. CH 1 PARTS 101-199, CH 2 PARTS 201-299.
30
VENDOR
PARTS LIST
UNLESS OTHERWISE SPECIFIED
8
DESCRIPTION
CONTRACT NO.
FINISH
DO NOT SCALE DRAWING
3
O
APPROVALS
DRAWN
PAT QUILTER
SCHEMATIC DIAGRAM
DATE
2-25-00
RMX 1450
CHECKED
ISSUED
CAD SEED FILE NO.
PLOT DATE:
Thu Sep 07, 2000
2
SIZE
FSCM NO.
SCALE
NONE
D
DWG NO.
REV
SH-001451-00
CAD FILE NO.
SHEET
RMX1450-4.sch
P:GPE
PRODUCTS\PRMX-SERIESQSC145
0
1
1
OF
3
4
PLOT DATE:
Thu Sep 07, 2000
QSC Audio Products, Inc.
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
8
7
6
4
5
3
2
1
D
D
CHANNEL-2
C201
180p-5%
J203 +
C221
C223
3300-100V
3300-100V
R261
12-5W
R262
12-5W
E201
D215
P1
Q210
2SC5200
Q212
2SC5200
P1
-78V
B
D218
1N4004
DWG NO.
3.0K-5W
SPEAKER CONNECTORS
ON BREAKAWAY PCB
FROM SHEET ONE
R259
0.22-3W
R237
22-1W
FP
R233
Q208
2SC5200
BR-NEG
J203 -
1N4148
Q204
2SC5200
2+
5-WAY
BINDING
POST
CH 2
JP16
TO CH 1
SHEET 1
J200
250V
Q206
MJE15033
BR-POS
JP15
C224
.068-5%
1.0K-5W
R247
6.8-1W
E200
SPEAKON
2uH
1+
R258
SPEAKER OUTPUT
2-
.022
CHANNEL 2
WIRES TO
SPEAKER
OUTPUT PCB
1-
L200
56p-200V-COG
-14V
R256
0.22-3W
R252
0.22-3W
R248
0.22-3W
R242
0.22-3W
D213
1N4148
CW
CCW
1.0K-5W
R253
0.22-3W
150K
^R_1206
C219
R249
0.22-3W
R232
R227
150K
^R_1206
R218
820
^R_1206
R215
P1
C211
C218
.0033
C
5.6-2W
R257
P1
POS
CURRENT
W LIMIT
D210
5.6V-.25W
CLIP CH 2
C222
3300-100V
R260
R246
6.8-1W
NEG
CURRENT
LIMIT
R243
0.22-3W
4
R221
20.0K
^R_0805
R217
20.0K
^R_0805
R214
4.75K
^R_0805
R219
C205
100-25V
-VCC_B
^C_1206
SEE SH 3
SH-001451-00
R204
150K
^R_1206
R234
50
LD200
RED
-15V_B
Q200
3906
C216
.022
NTC
+VCC_B
100
^R_0805
R211
R209
100
^R_0805
16
10.0K
^R_0805
R203
9
13
R240
2.2K
W
100
P1
C213
270
1N4148
R231
BIAS
220-25V
^R_0805
D206
1N4148
14
-VCC_B
SEE SH 1
D203
D200
15V-1W
A1
1N4148
C220
3300-100V
C217
.0033
W
R239
2.2K
CW
U201:2
NE5532
+
15
-
1N4148
7
CCW
-
D205
8
.15-5%
6
A1
R210
B
.15-5%
D202
^C_0805
D211
+
12
C209
100
^R_0805
R207
U10:2
LM13600M
10
C208
5
39K
^R_0805
R208
+14V
7.50K
^R_0805
SEE SH 3
D209
56p
CCW
C210
F_BYP_B
1N4148
CW
.22-5%
F_SND_B
P1
Q211
2SA1943
Q205
MJE15032
D214
15V-1W
D207
5.6V-.25W
1N4148
C207
Q209
2SA1943
P1
^C_1206
D201
^C_0805
F_30_B
220-25V
Q207
2SA1943
D216
0.0022u, 10%
10K LINEAR 3B
RIGHT ANGLE POT
180p-5%
SEE SH 1
C215
C
Q203
2SA1943
820
^R_1206
C212
R230
^R_0805
A1
C203
D208
^R_0805
1N4934
^R_0805
270
D217
1N4004
FP
LD201
YELLOW
3904
1N4934
10K
P1
820
^R_1206
10.0K
R236
22-1W
SIG CH 2
^C_1206
R212
10.0K
1N4148
+15V_B
R213
W
C214
R206
0.001u, 100V 5%
10-50NP
R201
-IN_B
+VCC_B
+78V
3.0K-5W
Q202
47
^R_0805
1
-
2
R224
^R_0805
500K
^R_1206
^R_0805
^R_0805
D204
R216
1K
C206
+
CW
SEE SH 1
3
10.0K
R235
1.5K
^R_0805
^R_1206
NE5532
U201:1
R202
CCW
R200
+IN_B
R229
10K
D212
^R_0805
R228
Q201
3904
R226
47K
A1
1N4148
R205
10.0K
1N4148
^C_0805
CLIP_B
SW-GND FOR CLIP LIM
A1
R220
R222
270
13.3K-1%-1/2W
SP_B
^R_0805
SEE SH 1
BR MONO RETURN -- CAUTION, SENSITIVE NODE
4
REV
2
SH
BR_RET
A
Gray shading indicates
signal path
A
7.7 RMX 1450 Schematic Diagram 2 of 3
Channel 2
8
RMX Series Technical Service Manual
7
6
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
5
4
3
2
DWG NO.
REV
SH-001451-00
CAD FILE NO.
PLOT DATE:
Thu Sep 07, 2000
SHEET
RMX1450-4.sch
4
2
OF 3
1
31
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
6
BLK
RED
-
J8A
RED
WHT
WHT
J9A
IEC AC INLET
0V
WHT
D2
D3
1N4148
1N4148
ATTACH TO HS-2
JP12
1
+
3
R19
BR_CUT
47
^R_0805
Q6
3906
J204:1
-15V_A
1N4004
-14V
P1
-15V_B
C
MAINTAIN FULL
PRI-SEC CREEPAGE
J204:8
J157:2
JP10
3
200V-1A
AC2
AC1
SEE SH 1
BR1
1
J21:2
J18:1
2
+
TO DC FAN
2
J18:2
-
!
2500V
HI-POT
U2
R7
60C 100 OHM
4N29
ATTACH TO HS-1
9
J204:9
J21:1
9
J104:9
J157:1
1
4
Q3
1
TIP31C
R17
120-2W
-
GND
J104:8
8
TH_A
TO POWER SWITCH
2
8
R4
60C 100 OHM
!
1
NEUT
1N4148
J204:3
3
J104:1
2
1N4148
2
MAINTAIN FULL
PRI-SEC CREEPAGE
20 VAC TO FAN POWER RECTIFIER
R1
B
B
C6
1000-35V
4
REV
3
SH
SH-001451-00
DWG NO.
1.1 AMP
28V PRI-SIDE DC FAN SUPPLY
2
LINE
470K
^R_1206
D6
20V
!
JSW
R26
220K
^R_0805
D7
AC INPUT, LOW (ALL)
CIRCUIT BREAKER
USA: 15A-125V
EUROPE: 7.5A-250V
D5
1N4148
6.81K
^R_1206
AC2
AC1
-VCC_B
J104:3
3
R25
P1
Q7
3906
D10
D9
BR_CUT
1N4148
RED
BLK
E12
120V
GRY
J7A
BLU
E16
C11
.1-5OV
1N4004
1
R15
Q8
3904
Q9
3904
D11
1
R14
RED
4
+15V_A
J104:2
1N4004
Q5
MPSW05
6.81K
^R_1206
WHT
-
+
1N4148
+15V_B
J204:2
D12
P1
C7
4.7-250V
R9
J6A
1
D4
6.81K
^R_1206
GRY
400V-25A
1N4148
Q1
300V-.2A
R13
BLK
-
R5
15K-2W
BR200
C227
0.22-200V
E8
R6
1.0M
^R_1206
2.0K
^R_0805
-
-
E7
R3
1.0M
^R_1206
+VCC_B
E11
Q4
D14
R12
-
F200
12A-125V
COIL TWO
J5A
E15
E6
D
470K
^R_1206
J4A
E5
1
5
BLU
2
!
2
2
^R_1206
R2
15K-2W
-VCC_A
^R_1206
C8
47-50V
3906
R8
BLU
E10
4
J3A
E14
D13
1N4004
P1
6
J2A
-
4
15V
R18
220K
R27
220K
1
BRN
GRY
-
+14V
D8
^R_1206
3
BRN
GRY
+
2
BRN
BLK
1
E4
0V
1N4004
PILOT
LED
20V
COIL ONE
C
C127
0.22-200V
BLU
R10
150K
400V-25A
AC1
240V
E9
D1
LD1
GRN
E2
E3
+VCC_A
3
120V
BRN
QUICK
CONNECT
PC-MTD
TABS
TRANSFORMER PRI LEADS
120V
3
BR100
3
!
AC INPUT, HIGH (ALL)
100V
E13
F100
12A-125V
R21
1 OHM 30A
J157:3
3
!
E1
2
MUTING AND THERMAL PROTECTION.
J21:3
U-I CORE POWER TRANSFORMER
NOTE SPLIT SECONDARY WIRING
FROM EACH LEG TO EACH CHANNEL
3
2.0K
^R_0805
!
AC VOLTAGE
PROGRAMMING
TERMINALS
4
5
RECTIFIERS BR100, 200 AND C127-227 ARE
LOCATED OFF THE MAIN PCB, MOUNTED
TO CHASSIS.
D15
7
15V
8
AC2
D
A
A
7.8 RMX 1450 Schematic Diagram 3 of 3
Power Supply
8
32
7
6
5
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
4
3
2
DWG NO.
REV
SH-001451-00
CAD FILE NO.
PLOT DATE:
Thu Sep 07, 2000
SHEET
RMX1450-4.sch
4
3
OF 3
1
QSC Audio Products, Inc.
4.7K
^R_0805
^R_0805
1
CHANNEL-1
10
CLIP LIM B (10)
20
CLIP LIM B
GND
-IN B
+IN B
GND
22
23
24
25
26
J1:22
J2:22
J1:23
J2:23
J1:24
J2:24
J1:25
J2:25
J1:26
J2:26
20
25
C171
A1
1.5-2W
23.2K-1%-1/2W
Q113
MAC224
MT2
^R_0805
R123
23.2K-1%-1/2W
CLIP_B
R126
R167
1K
^R_0805
^R_1206
464K
2+
SPEAKON
1+
2-
J100
68K
^R_1206
R22A
68K
^R_1206
SPEAKER BUS -- AFTER FUSE
R194
12K-1W
C176
47K
47pF-50V-5%
^R_0805
^C_0805
+IN_B
26
R187
150K
4.7K
^R_1206
^R_0805
470K
1
4
^R_0805
C179
R192
R193
.0033
150K
4.7K
^R_1206
^R_0805
U171
GND
V+
^U_LM311
2
8
7
3
2.00K
BAL/STR
V-
C177
47pF-50V-5%
D177
^R_0805
P1
-55_A
R183
R185
R186
3.01K
^R_0805
BAL
^LM311-SMT
Q173
3904
1N4148
^D_SOT-23
R191
6
5
2.2K
^R_0805
^Q_BJTN_SOT-23
R189
Q175
3906
SP_B
C123
12000-63V
^C_0805
47
^R_0805
^Q_BJTP_SOT-23
Q174
RFZ44
DWG NO.
R122
4.7K
B
R24
BR_BAL
-110_A
F_30_B
A1
1-
1N4148
^D_SOT-23
MUR1520
8.2K-5W
R138
.1-250V
D176
R135
390
C175
R182
R137
22-1W
FP
8.2K-5W
68K
^R_1206
-14V
-IN_B
MT1
R156
0.22-3W
R152
0.22-3W
R148
0.22-3W
D112
1N4148
^D_SOT-23
R142
0.22-3W
R_RES1W
R_RES1W
8
4
CCW
D114
R121
D113
C126
0.068-250V
D118
R23A
F_BYP_B
F_SND_B
R120
R133
^R_0805
R195
A
Q112
2SC5200
R22B
100-16NP
23
24
24K
^R_0805
R117
24K
^R_0805
.001-5%
4.7K
^R_0805
C125
21
22
Q110
2SC5200
68K
^R_1206
J2:21
Q108
2SC5200
SH-002451-00
SW1:10
J2:20
J1:21
19
P1
Q104
2SC5200
SH
20
GND 21
J1:20
18
^R_0805
^D_SOT-23
2
19
J2:19
^C_1206
A1
WIRES TO
BREAK-AWAY
SPEAKER
OUTPUT PCB
R155
12-5W
REV
9
J2:18
J1:19
100
J103 -
JP13
4
FILT CAP B
SW1:9
FILTER 30 HZ (9)
J1:18
R197
R154
12-5W
1N4148
R23B
19
C130
BR-NEG
E101
P1
R188
18
^R_0805
100p-50V
5-WAY
BINDING
POST
CH 1
R162
12-5W
12000-63V
5.1K-5W
18
17
-15V_A
820
BR_CUT
BR-POS
1N4004
^Q_BJTP_SOT-23
R111
JP14
J103 +
R161
12-5W
D115
D178
8
J2:17
2.2K-5W
Q106
MJE15033
3906
BR_BAL
E100
12V-1W-1N4742A
FILT BYP B
FILT SEND B (POT)
SW1:8
FILTER BYPASS B (8)
J1:17
16
P1
2uH
C122
C180
17
J2:16
A1
Q100
25A-125V
R158
D110
5.6V-.25W
CLIP CH 1
4
L100
C124
0.068-250V
R159
0.22-3W
BRIDGE
MONO
(6, 7)
J1:16
15
LD100
RED
SPEAKER OUTPUT PCB
F100
2.2K-5W
100-25V
B
16
17
J2:15
NTC
R157
R153
0.22-3W
SW1:7
7
J1:15
^D_SOT-23
.022
CHANNEL 1
CT_A
2.2K-5W
R147
3.3-1W
5.90K
^R_0805
15
^D_SOT-23
R134
50
C116
.022
POS
CURRENT
W LIMIT
R184
BR MONO FEED
R104
16
270
^R_0805
R196
SW1:6
6
15V-1W
100
BIAS
C119
C
SPEAKER CONNECTORS
ON BREAK-AWAY PCB.
CONTINUED, SHEET 2
5.6-2W
SEE SH 3
R198
3.3-1W
R149
0.22-3W
A1
D106
1N4148
R140
2.2K
W
P1
^D_SOT-23
P1
^C_1206
14
D103
1N4148
R131
NEG
CURRENT
LIMIT
.1-50V-10%
J2:14
^D_SOT-23
R139
2.2K
C178
J1:14
A1
3
13
C132
47P-50V
^C_1206
^D_SOT-23
D111
GND 14
-
1N4148
D100
2
8
BR_RET
U101:2
NE5532
1N4148
100-1/4W
C121
R146
R143
0.22-3W
12
15
BR M SEND (HI-SIG A)
+
5
7
+
D105
R127
13
U10:1
LM13600M
BR MONO FEED
7
820
^R_1206
11
SW1:5
5
R114
J2:13
10
-
.15-5%
R115
PARALLEL
INPUTS
(4, 5)
14
C131
J1:13
9
SW1:4
4
R108
J2:12
7.50K
^R_0805
J2:11
J1:12
A1
100
^R_0805
12
J1:11
^C_1206
R110
GND
J2:10
.1-50V-10%
100
^R_0805
11
13
J1:10
P1
8
R109
SW1:3
3
FILTER BYPASS A (3)
9
GND 10
J2:9
R107
12
J2:8
J1:9
6
5
39K
^R_0805
FILT-BYP A
SW1:2
2
FILTER 30 HZ (2)
J1:8
.15-5%
^C_1206
8
C102
7
C105
11
J2:7
+14V
D102
^C_0805
C109
R164
2N5064
R160
W
G
12000-63V
1N4148
Q105
MJE15032
R163
10-1/4W
D120
2N5064
1N4004
D116
D107
5.6V-.25W
D119
R165
15K-1W
D117
Q111
2SA1943
P1
27p
C108
100-25V
FILT-SEND A
SW1:1
1
CLIP LIM A (1)
J1:7
6
C104
7
SW TO GND FOR CLIP LIM
5
.1-50V-10%
FILT-CAP A
J2:6
150K
^R_1206
6
J2:5
J1:6
11
GND
J1:5
1
5
6
1
R103
CLIP-LIM A
3
10.0K
^R_0805
2
Q109
2SA1943
CW
C110
FILT-BYP A
SIG CH 1
Q107
2SA1943
R130
820
^R_1206
P1
15V-1W
Q103
2SA1943
CCW
C107
.22-5%
C174
0.1-250V
FP
CW
D101
Q102
3904
^Q_BJTN_SOT-23
R181
1.5-2W
22-25NP
274
S
J201
R136
22-1W
LD101
YELLOW
P1
^D_SOT-23
^R_0805
A1
10K LINEAR 3B
RIGHT ANGLE POT
8.2K-5W
1N4148
^C_1206
DC FAULT
PROTECTION
C129
1N4148
C115
TIP T
0.01
+15V_A
D175
MUR1520
R119
^D_SOT-23
R113
FILT-SEND A
D
R180
TO -VMED
8.2K-5W
D104
27p-200V-COG
FILT-CAP A
1
C173
100-25V
+110_A
R118
1N4148
^D_SOT-23
^C_1206
CHANNEL 1 GAIN
W
Q172
3906
^Q_BJTP_SOT-23
5.1K-5W
^C_1206
R112
10K
^C_0805
1.5K
^R_0805
C181
^R_0805
D108
R106
10.0K
^R_0805
180p-5%
R129
10K
D109
C103
R128
R132
A1
47-10NP
^R_0805
CW
1
3.01K
5
C120
12000-63V
.36W at full clip
^C_1206
4
^R_0805
^R_1206
C114
J2:4
^R_1206
^R_1206
464K
-
2
^R_0805
J1:4
10V-1N4740A
C111
^R_0805
10.0K
4.7K
0.0015u, 250V
^C_1206
C3
470p 5%
C4
R101
3
RING R
J202
1K
150K
100
^R_0805
C
470p 5%
J5:1
CH2_+IN
2
^C_1206
J5:2
C2
CHASSIS_GND
CH2_-IN
4
GND
J2:3
R166
C106
+
3
D174
75
^R_0805
3
^C_1206
C1
J5:3
3
J1:3
A1
NE5532
U101:1
R102
R179
Q101
3904
^Q_BJTN_SOT-23
R125
47K
R124
-IN A
4
470p 5%
CH1_-IN
470p 5%
FIVE POSITION BARRIER STRIP
J5:4
^R_0805
5
R178
^R_0805
SPEAKER BUS -- BEFORE FUSE
^R_0805
10.0K
S
J5:5
CH1_+IN
10.0K
R100
2
R_RES1W
R105
220-25V
+IN A 2
J2:2
^C_0805
1
C113
TIP T
J102
J1:2
J2:1
220-25V
RING R
J1:1
R116
1
820K
^R_1206
GND
6
RFZ44
47
+55_A
CW
1
P1
BAL
0.0022u, 10%
180p-5%
3
CCW
J101
3.3-1W
A1
R175
^LM311-SMT
1N4934
C101
2
ROUTE THIS GROUND
TO "P" GND AT
HEAT SINK COMMON
BETWEEN CH A AND CH B
V-
1N4934
R20
8
820
^R_1206
ROUTE THIS GROUND
TO "A" GND AT
JI-2 INPUT CABLE
BAL/STR
4
CCW
26-LINE RIBBON CABLE
CONNECTS BREAKAWAY
INPUT PCB TO MAIN PCB
C112
D
V+
7
3
R177
12K-1W
1N4148
^D_SOT-23
U170
GND ^U_LM311
2
2.00K
^R_0805
D171
470K
Q170
R170
^C_0805
D173
150K
^R_1206
Q171
3904
47pF-50V-5%
1N4148
^D_SOT-23
R190
^Q_BJTN_SOT-23
12K
^R_0805
.0033
R174
+110_A
C170
R176
R173
R171
D170
C172
R172
1
2
3
POS STEP DRIVER
10-35V
4
5.90K
^R_0805
5
6
3.9V
7
8
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
-110_A
NEG STEP DRIVER
Gray shading indicates
signal path
A
7.9 RMX 2450 Schematic Diagram 1 of 3
Channel 1
8
RMX Series Technical Service Manual
7
6
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
5
4
3
2
DWG NO.
REV
SH-002451-00
CAD FILE NO.
P:GPE
PRODUCTS\PRMX-SERIESQSC245
0
SHEET
1
4
2
OF 4
PLOT DATE:
Thu Sep 07, 2000
33
4
5
3
BIAS
4
J204:4
P1
D273
10-35V
2.2K-5W
5-WAY
BINDING
POST
CH 2
JP16
12000-63V
Q210
2SC5200
Q212
2SC5200
1N4148
^D_SOT-23
Q213
MAC224
BR-NEG
J203 -
R254
12-5W
R255
12-5W
SPEAKER CONNECTORS
ON BREAKAWAY PCB
FROM SHEET ONE
P1
Q208
2SC5200
TO CH 1
SHEET 1
P1
1N4148
C226
0.068-250V
D218
B
390
23.21K-1%-1/2W
J104:11
DWG NO.
J204:11
11
SP_B
^R_0805
C276
47K
47pF-50V-5%
C223
^R_1206
^R_0805
2.00K
1
R292
R293
.0033
150K
4.7K
C_MYL2_AI
^R_1206
^R_0805
V+
2
4
C279
U271
GND
8
7
3
^R_0805
Gray shading indicates
signal path
BAL/STR
V-
BAL
1N4148
^D_SOT-23
R291
6
5
2.2K
^LM311-SMT
^R_0805
R289
Q275
3906
Q274
3
SH
^Q_BJTN_SOT-23
REV
D277
^R_0805
RFZ44
47
^R_0805
^Q_BJTP_SOT-23
D278
4.7K
12V-1W-1N4742A
R287
150K
47pF-50V-5%
^C_0805
Q273
3904
R288
R286
470K
C278
R295
R_RES1W
R294
12K-1W
5.1K-5W
^C_0805
R285
-55_B
12000-63V
C277
4
R283
^R_0805
C280
4.7K
^R_0805
100-25V
R238
A1
11
MUR1520
-110_B
R284
SW-GND FOR CLIP LIM
R222
.1-250V
D276
SH-002451-00
1.5-2W
R259
0.22-3W
R253
0.22-3W
R237
22-1W
FP
8.2K-5W
R249
0.22-3W
R233
5.90K
^R_0805
100-16NP
R220
C275
R282
.1-50V-10%
^C_1206
C225
CLIP_B
A
R262
12-5W
E201
C222
D215
8.2K-5W
BR_RET
BR-POS
J203 +
R261
12-5W
R235
SEE SH 1
BR MONO RETURN -- CAUTION, SENSITIVE NODE
SPEAKER OUTPUT
JP15
C224
.068-250V
R258
R243
0.22-3W
D211
Q200
3906
^Q_BJTP_SOT-23
1N4148
^D_SOT-23
C205
^R_0805
4-5 MA CHARGE CURRENT
1 MA DISCHARGE.
SEE SH 1
E200
2uH
25A-125V
R257
CHANNEL 2
WIRES TO
SPEAKER
OUTPUT PCB
L200
F200
1N4004
820K
100-25V
150K
^R_1206
R204
MT2
C229
CT_B
R211
-14V
MT1
R242
0.22-3W
R248
0.22-3W
2.2K-5W
.022
5.6-2W
SEE SH 3
^D_SOT-23
Q204
2SC5200
C
100-1/4W
P1
2.2K-5W
Q206
MJE15033
820
^R_1206
J104:4
R232
4
R_RES1W
R247
3.3-1W
R264
2N5064
R260
R298
P1
POS
CURRENT
LIMIT
G
12000-63V
C219
D210
5.6V-.25W
100
^R_0805
820
^R_1206
R215
R210
100
^R_0805
R209
5.90K
^R_0805
820
^R_1206
CLIP CH 2
P1
C221
^D_SOT-23
NEG
CURRENT
LIMIT
W
NTC
13
A1
R234
50
LD200
RED
C213
2N5064
2+
^D_SOT-23
R240
2.2K
W
C216
.022
R246
3.3-1W
W
R239
2.2K
R263
10-1/4W
D220
SPEAKON
^D_SOT-23
R231
15K-1W
1+
D206
1N4148
100
15V-1W
-15V_B
220-25V
100
^R_0805
16
D203
1N4148
D200
D219
R265
1N4004
2-
U201:2
NE5532
Q205
MJE15032
CW
^D_SOT-23
DC FAULT
PROTECTION
D217
Q211
2SA1943
1N4148
CCW
^D_SOT-23
C274
.1-250V
J200
4
+
D207
5.6V-.25W
^C_1206
1N4148
14
10.0K
^R_0805
R203
R230
1N4148
7
24K
^R_0805
R214
D205
Q209
2SA1943
R_RES1W
.15-5%
5
4.7K
^R_0805
D202
Q207
2SA1943
R281
1.5-2W
P1
CW
-
Q203
2SA1943
1N4148
6
A1
9
B
^R_0805
27p
15
-
J104:7
C210
R227
+
12
.15-5%
7
R224
75
^C_0805
C209
FP FP
^D_SOT-23
R207
U10:2
LM13600M
39K
^R_0805
A1
C208
P1
8
.001
270
^R_0805
R296
R208
7.50K
^R_0805
C231
.22-5%
+14V-A
10
15V-1W
J204:7
+55_B
D216
0.0022u, 10%
SW-FILT BYPASS
R236
22-1W
1N4934
SW-30 HZ
F_BYP_B
C207
7
C215
F_BYP_B
D201
+15V_B
^C_0805
F_30_B
C212
220-25V
1N4934
10K LINEAR 3B
RIGHT ANGLE POT
R219
SIG CH 2
D208
^R_0805
A1
180p-5%
SEE SH 1
J104:6
R280
TO -VMED
D275
MUR1520
8.2K-5W
P1
1N4148
C273
100-25V
+110_B
Q202
3904
^Q_BJTN_SOT-23
D209
6
274
C204
^R_0805
Q272
3906
^Q_BJTP_SOT-23
8.2K-5W
CW
^R_0805
^R_0805
^R_0805
R218
1N4148
^D_SOT-23
^D_SOT-23
^C_1206
^R_0805
10K
1.5K
C281
J204:6
C214
10.0K
W
R212
R229
10K
3.01K
5
D
C220
12000-63V
5.1K-5W
D212
R228
6
0.01
0.0015u, 250V 5%
10.0K
^R_0805
^R_1206
6
^C_1206
R221
C
R206
^R_1206
27p-200V-COG
R213
R216
R201
-IN_B
47-10NP
-
2
4.7K
D204
820K
^R_1206
1
^R_0805
C211
C206
+
3
150K
10V-1N4740A
R225
4.7K
^R_1206
24K
^R_0805
1K
SEE SH 1
10.0K
^R_0805
D274
Q201
3904
^Q_BJTN_SOT-23
464K
NE5532
U201:1
R217
R202
CW
R200
10
J104:10
5
R266
A1
CCW
+IN_B
10
J204:10
10.0K
^R_0805
J104:5
SPEAKER BUS -- BEFORE FUSE
YELLOW
R205
LD201
^C_0805
J204:5
BAL
^LM311-SMT
R279
R278
R275
7
BAL/STR
V-
^R_0805
1-
4
8
RFZ44
47
22-25NP
3
CCW
C201
180p-5%
V+
2
2.00K
^R_0805
1N4148
^D_SOT-23
U270
GND
Q270
R270
^C_0805
1N4148
^D_SOT-23
1
47pF-50V-5%
R276
^R_0805
R277
12K-1W
5
R271
4.7K
^R_0805
Q271
3904
D213
CHANNEL-2
^Q_BJTN_SOT-23
D271
470K
150K
^R_1206
.0033
R290
R274
1
C270
D214
D
R273
R272
2
+110_B
CCW
C272
3.9V
D270
POS STEP DRIVER
R256
0.22-3W
6
C271
7
12K
^R_0805
8
R252
0.22-3W
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
A
-110_B
NEG STEP DRIVER
7.10 RMX 2450 Schematic Diagram 2 of 3
Channel 2
8
34
7
6
5
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
4
3
2
DWG NO.
REV
SH-002451-00
CAD FILE NO.
PLOT DATE:
Thu Sep 07, 2000
SHEET
RMX2450-4.sch
4
3
OF 4
1
QSC Audio Products, Inc.
D
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
8
7
6
4
5
3
2
1
D
CT_A
SEE SH 1
E112
E114
E14
1
J21:1
1
J157:1
+110_A
E9
E11
1
+
4
+
C227
0.22-250V
-
C10
20V
R29
R28
12-5W
12-5W
D2
SEE SH 2
CT_B
1N4148
^D_SOT-23
GND
3
J204:8
8
J104:8
JP12
TO POWER SWITCH
JP10
AC1
200V-1A
AC2
R7
60C 100 OHM
D15
15V
1
J21:2
^D_SOT-23
2
R1
2
J18:2
-
4N29
B
ATTACH TO HS-1
9
J104:9
9
J204:9
Q3
TIP31C
R17
28V PRI-SIDE DC FAN SUPPLY
120-2W
C6
1000-35V
4
REV
4
SH
1.1 AMP
+
U2
2500V HI-POT
4
2
20 VAC TO FAN POWER RECTIFIER
J18:1
TO DC FAN
!
-
3
BR1
1N4148
R13
2
1N4148
^D_SOT-23
8
J157:2
2
3
NEUT
JSW
ATTACH TO HS-2
1
1
D3
R4
60C 100 OHM
!
2 PIN HEADER
D6
CT_A
0.047-400V
0V
+
LINE
J104:13
-15V_A
^R_1206
D7
MAINTAIN FULL
PRI-SEC CREEPAGE
IEC AC INLET
J204:13
13
MAINTAIN FULL
PRI-SEC CREEPAGE
1N4148
^D_SOT-23
!
CIRCUIT BREAKER
USA: 15A-125V
EUROPE: 7.5A-250V
13
-55_B
AC INPUT, LOW (ALL)
B
A1
-15V_A
DWG NO.
J3A
220K
^R_0805
R14
J2A
WHT
1N4148
^D_SOT-23
1N4004
-14V
C
R30
100
^R_0805
Q6
3906
^Q_BJTP_SOT-23
-15V_B
D10
464K
^R_0805
^Q_BJTP_SOT-23
J104:1
1
P1
6.81K
^R_1206
-
WHT
R26
R9
BLK
RED
WHT
D5
6.81K
^R_1206
RED
BLU
E215
E20
E12
120V
J7A
RED
-110_B
1N4148
^D_SOT-23
47
Q7
3906
J204:1
1
R15
2.0K
^R_0805
RED
E213
E19
4
1N4004
D9
^Q_BJTN_SOT-23
R12
WHT
GRY
^R_1206
3
2
1
-
1N4148
^D_SOT-23
+15_B
SH-002451-00
COIL TWO
C228
0.22-250V
1N4148
^D_SOT-23
C7
4.7-250V
R25
P1
470K
^R_1206
J9A
R5
33K-2W
+55_B
Q1
300V-.2A
D4
C9
100pF
^C_1206
^Q_BJTN_SOT-23
5
J8A
GRY
R6
1.0M
6
BLK
-
E214
1.0M
400V-25A
3
-
-
400V-25A
AC1
COIL ONE
E10
-
E18
R3
+110_B
BR200
BR201
2
J6A
BLU
AC2
BLU
E212
E7
E8
BLK
AC1
3
AC2
0V
E17
4
BLK
E6
3
J5A
-110_A
1N4004
Q5
MPSA06
D11
^Q_BJTP_SOT-23
D14
C11
.1-5OV
D13
P1
3906
^R_1206
R2
33K-2W
2.0K
^R_0805
-
330K
-55_A
1
GRY
4
BR101
Q4
BR_CUT-A
Q8
3904
Q9
3904
J204:2
J104:3
3
BR_CUT
J104:2
2
J204:3
3
^Q_BJTN_SOT-23
P1
2
GRY
-
400V-25A
^R_1206
C8
47-50V
R27
R8
J4A
E115
2
220K
15V
^R_1206
J21:3
BRN
E16
150K
LD1
GRN
J204:12
+15V_A
1N4004
R18
3
BRN
20V
+
E113
J157:3
BRN
BLU
1
C128
0.22-250V
2
TRANSFORMER PRI LEADS
E5
1N4004
E15
PILOT
LED
AC1
QUICK
CONNECT
PC-MTD
TABS
240V
E4
120V
4
-
^R_1206
BRN
AC1
R21
1 OHM 30A
E3
400V-25A
+
J104:12
12
D12
D8
R10
AC2
120V
E2
!
AC INPUT, HIGH (ALL)
100V
BR100
1
2
C
C127
0.22-250V
E1
3
AC VOLTAGE
PROGRAMMING
TERMINALS
AC2
U-I CORE POWER TRANSFORMER
NOTE SPLIT SECONDARY WIRING
FROM EACH LEG TO EACH CHANNEL
+15V_A
+55_A
D1
12
+14V
MUTING AND THERMAL PROTECTION.
R19
E13
6.8K
^R_1206
RECTIFIER BR100-201 CIRCUIT
IS DRAWN FOR CHASSIS MTG
OF RECTIFIERS. E-POINTS ARE
WIRE CONNECTIONS.
A
A
7.11 RMX 2450 Schematic Diagram 3 of 3
Power Supply
8
RMX Series Technical Service Manual
7
6
SIZE
FSCM NO.
SCALE
NONE
D
NOTES: UNLESS OTHERWISE SPECIFIED
5
4
3
2
DWG NO.
REV
SH-002451-00
CAD FILE NO.
SHEET
RMX2450-4.sch
PLOT DATE:
Thu Sep 07, 2000
4
4
OF 4
1
35
8
7
6
5
4
3
2
1
REVISIONS
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
REV
OUTPUT PCB
1724-340C-0102
E100
E101
26 CONDUCTOR RIBBON CABLE
WITH PIN-TO-PIN INTERCONNECTS
INPUT PCB
E200
D
J1
J203
1
1
E201
MAIN PCB
1724-330A-0001
JP14
WHI
DESCRIPTION
EFF. DATE
CHK APPROVED/DATE
J103
CH 1 SPKR OUTPUT
JP13
GRY
CH 1 SPKR COMMON
JP15
WHI
CH 2 SPKR OUTPUT
D
JP16
GRY
CH 2 SPKR COMMON
J203
RED
E9
BLK
E10
26
INPUT PCB
1724-340B-0102
26
WIRE ASSY
GRN
E112
E212
RED
E11
BLK
2
C
1
FAN ASSY
E12
C
1
J128 2
3
3-PIN CABLE ASSY
J18
1
1
2
J21 2
3
E1
E2
E3
E4
E5
E6
E7
E8
AC POWER
SWITCH
GRY
RED
WHT
VIO
BLU •
GRN
BLK
BLU
BRN
BRN
J3A
J7A
J7A
J9A
J9A
J9A
J7A
J8A
J5A
J4A
J4A
J4A
J8A
J2A
J2A
J2A
-VCC_A
+VCC_A
A
CIRCUITBREAKER
J6A
REV
BRN
GRN
BLU
230V 100V
J3A
1
HOT
GND
NEUT
120V
SH
A
B
SH-0025000
AC POWER CORD
-VCC_B
+VCC_B
DWG NO.
TRANSFORMER
(1806-2505-0)
RED •
B
A
JP12
BRN
JP10
AUDIO PRODUCTS, INC.
PWR PCB
1724-340A-0102
COSTA MESA, CALIFORNIA
WIRING DIAGRAM,
RMX 850
7.12 RMX 850 Chassis Wiring Diagram
REV
A
NOTES: UNLESS OTHERWISE SPECIFIED
SCALE
8
36
7
6
5
4
3
2
SHEET
NONE
1 OF 1
1
QSC Audio Products, Inc.
8
7
6
5
4
3
2
1
REVISIONS
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
REV
OUTPUT PCB
1724-340C-0102
E100
E101
26 CONDUCTOR RIBBON CABLE
WITH PIN-TO-PIN INTERCONNECTS
INPUT PCB
E200
D
J1
J203
1
1
E201
MAIN PCB
1724-330A-0001
JP14
WHI
DESCRIPTION
EFF. DATE
CHK APPROVED/DATE
J103
CH 1 SPKR OUTPUT
JP13
GRY
CH 1 SPKR COMMON
JP15
WHI
CH 2 SPKR OUTPUT
D
JP16
GRY
CH 2 SPKR COMMON
J203
RED
E9
BLK
E10
26
INPUT PCB
1724-340B-0102
26
WIRE ASSY
GRN
E112
E212
RED
E11
BLK
2
C
1
FAN ASSY
E12
C
1
J128 2
3
3-PIN CABLE ASSY
J18
1
1
2
J21 2
3
E1
E2
E3
E4
E5
E6
E7
E8
BLK
BLU
AC POWER
SWITCH
VIO
VIO •
GRY
RED
BLU
BLU •
WHT
GRN
RED
GRN •
BRN
BRN
J3A
J7A
J7A
J9A
J9A
J9A
J7A
J8A
J5A
J4A
J4A
J4A
J8A
J2A
J2A
J2A
-VCC_A
+VCC_A
A
CIRCUITBREAKER
J6A
REV
BRN
GRN
BLU
230V 100V
J3A
1
HOT
GND
NEUT
120V
SH
A
B
SH-0025000
AC POWER CORD
-VCC_B
+VCC_B
DWG NO.
TRANSFORMER
1806-2506-0
RED •
B
A
JP12
BRN
JP10
AUDIO PRODUCTS, INC.
PWR PCB
1724-340A-0102
COSTA MESA, CALIFORNIA
WIRING DIAGRAM,
RMX 1450
7.13 RMX 1450 Chassis Wiring Diagram
REV
A
NOTES: UNLESS OTHERWISE SPECIFIED
SCALE
8
RMX Series Technical Service Manual
7
6
5
4
3
2
SHEET
NONE
1 OF 1
1
37
8
7
6
5
4
3
2
1
REVISIONS
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
REV
OUTPUT PCB
1724-342A-0102
E100
E101
26 CONDUCTOR RIBBON CABLE
WITH PIN-TO-PIN INTERCONNECTS
INPUT PCB
E200
D
J1
J203
1
1
MAIN PCB
1724-332A-0003
E201
JP14
WHI
A
DESCRIPTION
EFF. DATE
CHK APPROVED/DATE
PRODUCTION RELEASE PER ECO X MP
J103
CH 1 SPKR OUTPUT
JP13
GRY
CH 1 SPKR COMMON
JP15
WHI
CH 2 SPKR OUTPUT
D
JP16
GRY
CH 2 SPKR COMMON
J203
RED 5
E112
RED 4
E114
BLK 3
E113
26
INPUT PCB
1724-342A-0102
26
BLK 2
E115
BLK 1
E116
WIRE ASSY
GRN
E117
E217
RED 5
2
C
RED 4
E214
1
FAN ASSY
E212
C
BLK 3
E213
BLK 2
E215
BLK 1
E216
1
J257 2
3
3-PIN CABLE ASSY
J18
1
2
3
1
2
E1
E2
E3
E7
E8
E9
E4
E5
E6
E10
E11
E12
BLK
BLU
AC POWER
SWITCH
YEL
VIO(2)
VIO
GRY
ORG
RED
GRN(2)
WHT
GRY
GRN
BLU(2)
BLU
BRN
RED
BRN
BRN
230V 100V
J5A
J9A
J5A
J7A
J7A
J3A
J3A
J3A
J7A
J2A
J8A
J6A
+55V_A
J6A
J6A
J2A
+110V_A
J4A
J4A
J4A
CT_A
-55V_A
-110V_A
A
CIRCUITBREAKER
120V
REV
BRN
GRN
BLU
+55V_B
+110V_B
1
HOT
GND
NEUT
-110V_B
SH
A
B
SH-0025000
AC POWER CORD
CT_B
-55V_B
DWG NO.
TRANSFORMER
1806-2507-0
RED(2)
B
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
JP10
PWR PCB
1724-342A-0102
AUDIO PRODUCTS, INC.
COSTA MESA, CALIFORNIA
DATE
APPROVALS
WIRING DIAGRAM,
RMX 2450
DRAWN
12-12-00
MILA P.
7.14 RMX 2450 Chassis Wiring Diagram
NOTES: UNLESS OTHERWISE SPECIFIED
CHECKED
NEXT ASSY
38
7
6
5
4
DWG NO.
ISSUED
FG-002450-00 RMX 2450
SH-002450-00
USED ON
FIRST APPLICATION
8
A
PARTS LIST
JP12
BRN
SCALE
DO NOT SCALE DRAWING
3
2
SHEET
NONE
REV
A
1 OF 1
1
QSC Audio Products, Inc.
“QSC” and the QSC logo are registered trademarks of QSC Audio Products, Inc. 1675 MacArthur Blvd. Costa Mesa, CA 92626
(800) 772-2834 FAX (714)754-6173
www.qscaudio.com