TX3800
COMMERCIAL UHF RADIO
S er v ice M anual
Standard Communications Pty. Ltd.
MOBILE COMMUNICATIONS & ELECTRONICS
Locked Bag 2086, North Ryde, NSW, 1670, AUSTRALIA
Phone: +61 2 9844 6666 Fax: +61 2 9844 6600 Web: www.gme.net.au
Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Models
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Phase Locked Loop and VCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Microprocessor (CPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Antenna Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Receiver Audio Preamp & Mute. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Audio Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Microphone Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TX Driver and Output Stages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Revision Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RH003 Remote Head. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MC522BC Remote Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MC540BC Keypad Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Alignment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connecting the Radio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
VCO Control Voltage Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Reference Frequency Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Front End Band Pass Alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Front End Notch Alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
TX Output Power Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Abridged Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Main PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
MC522BC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
MC540BC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Component Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
LCD Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PCB Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TX3800
Service Manual
Page 2
Specifications
GENERAL
RF Performance
Compliant with AZ4295
Frequency Band
450 - 520 MHz
Number of Channels
99 + 40 UHF CB channels
Channel Spacing
25 kHz
Frequency Stability
±1 kHz
Modulation
FM
Operation Mode
Simplex of Half Duplex with Repeater Talk-around
Scanning Speed
50/100/200 ms per channel
Antenna Impedance
50 Ohms Nominal
Antenna Connector
BNC
Nominal Voltage
Operating Voltage Range
Test Voltage
Reverse Polarity Protection
Over Voltage Protection
Current
Operating Temperature
12 Volts DC Negative Earth
10.8 to 15.6 Volts
13.8 Volts DC
Diode Crowbar
18 Volt Crowbar
10 Amp in line fuse
0.2A receive (power save < 60 mA)
6A transmit into 50 Ohms
-10 to 60°C
TRANSMITTER
RF Output
Transmit Duty Cycle
RF Switching Bandwidth
Deviation Limiting
Pre-Emphasis
AF Distortion
Residual Modulation
Spurious Outputs
High - 25W Max
Low - 5W Adj
1:4 for 25W output
UHF, 70 MHz
±2.5 kHz or ±5 kHz at +20 dB AF Limiting
+6 dB per octave, +1 dB -3 dB, 300 Hz to 3 kHz
3%, below Limiting
-45 dB
< -75 dBc
RECEIVER
Circuit Type
Intermediate Frequencies
Sensitivity
Adjacent Channel Selectivity
Intermodulation
Blocking
Spurious Rejection
Audio Power
Audio Signal to Noise
Conducted Spurious Emission
Double Conversion Superheterodyne
1st: 45 MHz
2nd: 455 kHz
-122 dBm for 12 dB SINAD unweighted
-73 dB
74 dB
> 100 dB
> 75 dB
3W average into 4 Ohms
> 45 dB unweighted
< -80 dBm
MECHANICAL
Dimensions
Weight
TX3800
127 (W) x 29 (H) x 163 (D) mm
614 grams
Service Manual
Page 3
Models
The TX3800 series consists of the following models:
Model
Bandwidth
Function
Frequency Range
TX3800
Wideband
Compact PMR
450 - 520 MHz
TX3800N
Narrowband/Wideband
Compact PMR
450 - 520 MHz
TX3800BW
Wideband
Base PMR
450 - 520 MHz
TX3800BN
Narrowband/Wideband
Base PMR
450 - 520 MHz
TX3800T
Wideband
Telemetry
450 - 520 MHz
TX3800TN
Narrowband/Wideband
Telemetry
450 - 520 MHz
Compact PMR
Microphones
These models are standalone devices with an integrated speaker
There are several microphones that can be used with the PMR
and front panel display.
versions of the TX3800:
Base PMR
These models have an integrated speaker and a front connector
to allow connection to a remote head unit RH003 or an LCD
microphone MC522BC.
Telemetry
Model
Type
MC503BC
Basic
MC507BC
Basic
MC509BC
Basic
MC522BC
Remote LCD
MC540BC
Full keypad
These models have no integrated audio features and are suitable
The basic microphones include CALL/PTT switching and are used
for telemetry and high speed data applications. An audio kit can
with the compact PMR or the base PMR (in conjunction with an
be added to allow such devices to offer the same functionality as
RH003).
the PMR models.
The MC522BC is used as a standalone device attached directly
to the base PMR model.
There is no difference in the RF main boards between the
models. The functionality of the device is decided by the firmware
loaded onto the radio.
TX3800
Service Manual
Page 4
Technical Description
•
Power Supply
RF output driver U601
+8V - U52
The radio is designed to operate from a nominal 13.8 Volt power
R54
1K
source via DC input socket SK1. Excessive voltage and reverse
Q53
BC807W
polarity protection is provided by an asymmetrical suppression
diode D51.
R53
1K
+FILT Supply
Q51
PDTC144EU
Transistors Q71 and Q72 are configured as an active impulse
+8V TX
Q55
PDTC144EU
TX On
noise reject filter. The output voltage of this circuit follows
the average negative peak of the battery voltage with a small
adjustable offset. Positive spikes are suppressed. Feedback is
provided by the error amplifier Q72 and its collector current drives
the pass transistor Q71. The steady state voltage drop of the
Whilst receiving, pin 67 of the CPU U801 goes high and turns on the
regulator is set by the trimmer potentiometer RV71.
driver Q52. This causes Q56 to turn off and therefore ceases to short
Q71
2SJ349
+13.6V Unswitched
+13.6V Switched
R79
12K
R77
220K
R75
3K3
the +8V supply to ground. Q54 conducts and +8V appears at its
+FILT
R71
4K7
R72
100R
R78
10K
R76
3K3
D71
BAV99W
RV71
10K
R74
560R
Q72
BC847BW
C75
10u
R73
560R
collector. This supply is used by:
•
LNA Q201
•
First IF Mixer Q230
•
First IF Buffer Q240
Phase Locked Loop and VCO
Phase Locked Loop (PLL)
The reference frequency for the PLL U501 is taken from the
Colpitts oscillator formed around Q501. The frequency is set
by the 12.8 MHz crystal XT1. It is tuned to the exact centre
+8V Supply
frequency required using the varactor D501 which is pulled by
The 13.6V switched supply provides the input for the 8V regulator
U52. The separate +8V TX/RX supplies are derived from the +8V
pin 13 of the DAC U805 via R534. Temperate compensation is
provided by the CPU based on readings from the NTC RT501.
rail using transistors Q51-56. The +8V unswitched supply is used
The reference oscillator is AC coupled at the reference frequency
by the following:
input (pin 8) by C510. It is divided to produce a PLL reference of
•Pin 8 of audio preamp IC U351 and its surrounding bias
circuitry
•
12.5 kHz. The divisor is set by pins 70, 71 and 72 of the CPU,
corresponding to ENABLE, DATA and CLOCK (pins 13, 12 and
11 of U501 respectively).
Microphone amplifier IC U701
The output of the charge pump (pin 2) is connected to the voltage
•Voltage Controlled Oscillator Q101 and its buffer amplifier
controlled oscillator (VCO) input varactors in order to alter the VCO
frequency as to align its phase to that of the reference signal. The
Q102 and Q103
sections are connected by a passive loop filter in order to suppress
•
IF/FM Demodulator IC U301
sideband products that could cause instability in the VCO. The filter
Whilst transmitting, pin 66 of the CPU U801 goes high and turns on
the driver Q51. This causes Q55 to turn off and therefore ceases to
bandwidth is set to achieve a fast response to any difference at the
phase comparator output.
short the +8V supply to ground. Q53 conducts and +8V appears at
The phase comparator compares the reference signal and the VCO
its collector. This supply is used by:
output after each is divided by their respective ratios. The difference
•
Power control op-amp U603
TX3800
in frequency/phase is then used to drive the VCO through the loop
filter in order to negate the difference between the two sources.
Service Manual
Page 5
In order to modulate the carrier, the output of the microphone
the voltage regulator IC U804 which is connected to the 13.6V
amplifier is injected into the loop filter after attenuation by
switched supply.
the trimmer RV701, which therefore controls the modulation
deviation. The reference signal generated by Q501 is also
modulated by the same modulation source, further attenuated
by the trimmer RV531. As both signals are driven towards the
same change, there will be no reactionary force from the phase
comparator.
Buffer
IF Mixer Q230
6
Main
Divider
N
not run until the 5V supply is stable. Capacitor C818 is charged
+5V
Q101
PLL U501
Phase
Comparator
RV531
BAL
1
2
C801
470u
PLL UNLOCK
CLOCK
DATA
PLL ENABLE
5V Reg
C802
4u7
U802
M51943A
C818
22n
RESET
CPU Pin 12
Loop
Filter
Modulation
14
U804
+13.6V Switched
Reference
Divider
R
13 12 11
Balance
Frequency - DAC
supply voltage falls below 4.25V. This ensures that the CPU does
delay during start up.
VCO
Q102/103
5
8
The voltage detecting IC U802 will hold the CPU in reset if the 5V
by the current source in U802 and this provides an additional
TX Driver U601
Ref Osc
Q501
Reset Circuit
CPU Pin 54
RV701
Mic Amp
MOD
Power Fail Detector
Transistor Q801 will conduct less when the voltage at R810
CPU Pin 70
CPU Pin 69
CPU Pin 68
becomes greater than 8.5V. This results in a logic high at the
collector of Q802. After which when the input voltage is less than
When using 6.25 kHz channel spacing, the DAC adjusts the
7.5V, a logic low is the output. This detector is connected to
reference frequency using values provided by the CPU.
interrupt pin 20 of the CPU.
Voltage Controlled Oscillator (VCO)
EEPROM
The VCO is a conventional common collector stage based
A 93C86 EEPROM U803 is used to store user settings when the
around Q101. The main tuning element is a capacitively loaded
microstrip resonator. Frequency tuning is achieved by the set of
varactors D101, D102, D103 and D104.
radio is powered off. The CPU stores and retrieves data from the
EEPROM in serial format via pin 11 of the CPU. The serial data is
synchronised using the clock output from pin 10. Pin 18 enables
the EEPROM during the read/write sequence.
The frequency range of the VCO is 450 - 520 MHz in transmit mode
increasing the main PLL divisor).
The VCO output is applied to a cascode amplifier stage of Q102
and Q103. This provides gain and buffering to pin 1 of the TX
U803
R809
and 405 - 475 MHz in receive mode (the CPU initiates the shift by
DO
GND
CPU Pin 11
DI
ORG
CPU Pin 10
CLK
CPU Pin 18
CS
1K
NC
+5V
VCC
C803
100n
output IC U601. The output is also connected to the main divisor
in the PLL at pins 5 and 6 for comparison to the reference signal
by the phase comparator.
The series pass transistor Q104 provides a well filtered supply
Connectivity
voltage for the VCO section. It does this by effectively creating a
Connector J901 provides connectivity between the main board
virtual capacitor in the emitter circuit.
and the front panel (or remote head unit). It carries the 13.8V
Microprocessor (CPU)
switched supply, microphone audio, receive audio with volume
control and the two serial data lines.
J901
The CPU is an M16C62 microprocessor running in single-chip
1
2
3
4
5
6
7
8
mode. A 16 MHz crystal XT801 connected between pins 13 and
15 is used to generate the CPU timing clock. Pin 28 is used to
shift the clock frequency slightly higher if required, by switching
C815 into the circuit.
Remote Head Connector
Power Supply
The 10 pin connector J802 is used for Flash ROM programming and
The +5V supply required for the CPU is provided by pin 1 of
TX3800
CPU RX
CPU TX
Mic In
GND
Audio Out
Audio In
+13.6 Switched
+13.8V DC
as a secondary debug interface.
Service Manual
Page 6
+8V TX
Connector J801 is the 26 pin telemetry connector and uses the
R612
33R
line driver U841 to convert data to RS232 level.
Alarm
L602
390nH
Connector J80 provides the optional alarm input and output
D602
L605 13nH
Power Amp Output
C612
C611
Antenna
MA4P1250 L607
13nH
functionality.
The alarm input is activated by pin 4 of J80 when it is connected
D608
BA591
C618
68p
C623
33p
C617
12p
to pin 1 (or ground). If the radio is switched off, it will automatically
L609 13nH
D603
MA4P1250
switch itself on due to a voltage drop appearing across R81,
R618
allowing the pass transistor Q81 to establish the 13.6V switched
+8V RX
10K
Q603
BC817W
R619
+8V TX
Receiver Front End
C624
5p6
2K2
supply. This is maintained for the duration of the alarm procedure
by the latch action of Q85, controlled by pin 59 of the CPU.
Whilst pin 4 of J80 is held at ground, R86 will maintain a 5V drop
across it - therefore asserting an active low to pin 53 of the CPU.
In PMR models this will initiate a sequence in which a Selcall
signal is sent on a particular channel. The alarm input has no
default function in Telemetry/Data models.
Receiver
RF Amplifier
The incoming RF signal passes through a fixed high pass
The alarm output is a open collector stage Q82 which can
be used to drive external components such as flashing lights
or horns (current should not exceed 200mA). The output is
controlled by pin 58 of the CPU. The functionality of the alarm
output is decided by the firmware of the radio and can be
adjusted to suit individual requirements.
filter consisting of C201, C202 and L201. Adjacent to this is a
tuneable notch filter whose centre frequency is set by L202,
C203 and varactor D202 which is tuned by the DAC U805. The
filtered signal is amplifier by the LNA Q201 which is running at
approximately 25mA. The DC bias at the base is set by R204,
R205, R202 and R203.
+8V RX
Antenna Switching
The antenna RX/TX switching is achieved using three switching
diodes: D602, D603 and D608. The LPF that connects the
Bandpass Filter
antenna to the switch attenuates out-of-band signals and
R205
220R
C212
Tuning Voltage - DAC
R204
100R
L206
330nH
R202
1p5
22K
provides impedance matching between the TX output module
Q201
BFG520
and the antenna.
R203
10K
100p
When receiving, the diodes D603 and D608 are both reverse biased
due to the +8V RX at R618. This allows the received signal to flow
from the antenna LPF through L607 and L609 to the receiver front
end. D602 is also reverse biased, providing isolation from the TX
module.
D202 & L202
C206
Notch Filter
Before the first mixer stage, the LNA output is filtered by a three
section LC tank; the tuning voltages are also provided by the
CPU via the DAC and correspond to frequency calibration points
to D602 making it forward biased and therefore allowing the
output from the transmitter module U602 to pass to the antenna
LPF. This will also make D603/D608 forward biased; any RF will
D212 & L205
Tuning Voltage - DAC
Tuning Voltage - DAC
When transmitting, +8V TX is passed through R612 and L602
Tuning Voltage - DAC
stored in the EEPROM U803 or values interpolated from these.
D211 & L204
D210 & L203
be shunted to ground through C618/C623 and prevented from
reaching the receiver front end.
C212
First IF Mixer
LNA
1p5
Bandpass Filter - 3rd Stage
Bandpass Filter - 2nd Stage
Bandpass Filter - 1st Stage
First Mixer and IF Amplifier
The first mixer stage is a dual gate MOSFET Q230. The RF signal
from the output of the band pass section is applied to G2 of
Q230 and the LO signal from the VCO is applied to G1 after high
pass filtering from C231 and L231.
TX3800
Service Manual
Page 7
This 45 MHz IF output from Q230 is filtered by the crystal
frequency. This produces different matching requirements which
XF201 before gain is provided by the IF amplifier Q240. This
are fulfilled by following the component changes listed adjacent
also provides impedance matching between the two crystal
to the circuit diagram.
filters, XF201 and XF202. The second crystal filter provides the
final filtering before the second IF stage. Diode D241 prevents
overloading (and therefore increased audio distortion) of the input
of U301 in the case of a very strong input signal.
Receiver Audio Preamp & Mute
The demodulated audio from pin 11 of U301 is amplified by the
op-amp U351A. This is configured as a multiple feedback low
pass filter with a corner frequency of 3.5 kHz. Transistors Q361
+8V RX
and Q362 are normally switched on but can be switched off to
R233
330R
increase the corner frequency for high speed data applications.
Buffer Q240
C246
XF201
45T15A
R234
680R
R235
100R
L232
2.2uH
The audio mute switch is implemented by U502. When the CPU
Tuned Filter Output
1n
C247
1p
C234
3p3
C233
3p3
R232
270R
activates the ‘Audio Unmute’ line, audio passes through the closed
switch U502A to the audio power amplifier. When the ‘Audio
VCO Output
Q230
3SK241
Unmute’ line is low, U502B is closed and maintains a bias on the
positive end of C356 to prevent a “thump” during audio mute
switching.
IF, Limiter and FM Demodulator
U351B is used as a CTCSS low pass filter with a corner frequency of
250 Hz. The CTCSS output is connected to pin 93 of the CPU.
Demodulation is performed by the IC TK10487, U301 on the
schematic.
Audio Power Amplifier
The 45 MHz IF signal is coupled to pin 20 of U301 by C252,
The audio power amplifier U401 is based on the IC TDA1517N
where it is mixed with the local oscillator signal of 44.545 MHz
– from crystal XT301 and the integrated oscillator. The resultant
second IF is at a frequency of 455 kHz. This image is filtered by
the ceramic bandpass filter CF301 at pin 4 and is passed to the
limiter at pin 6. The limiter removes any amplitude modulation
from the signal, using C303 to provide decoupling. The filter
and is split into two gain blocks. In conjunction with the
surrounding passive components, a fifth order active high pass
filter with a corner frequency of 350 Hz is formed along with a
first order low pass filter with a corner frequency of 5 kHz. The
de-emphasis slope is provided by C401 and R403.
TR301 demodulates the frequency modulated signal and the
Trimmer RV402 provides a default audio level in the telemetry
audio is output at pin 11.
models, when the remote head is not connected.
The IF selectivity is set by the configuration of the IF filters and
Beep tones are injected before and after the volume control.
gain compensation only is provided by Q351.
C421 and R417 partially compensate for the de-emphasis
A DC voltage proportional to the strength of the incoming
signal is present at pin 12. This RSSI (Received Signal Strength
Indicator) signal is connected to pin 92 of the CPU.
network to give a reasonably flat response between 400 Hz and
1 kHz. R418 sets the minimum beep volume and bypasses the
volume control. R419 sets the maximum beep volume and is
mixed with the preamp output before attenuation by the main
volume control.
Squelch
An internal gain stage in U301 is configured as a bandpass filter
with gain. The noise is filtered by R305, C311, C312, R304 and
R306 resulting in a DC voltage proportional to the amount of
noise present on the channel, the filter peaks at around 25 kHz.
The output of the amplifier is coupled to the internal speaker and
external speaker socket by C414.
Microphone Amplifier
The gain of the amplifier is adjusted by RV301. The signal is
The microphone amplifier is built around four gain blocks from an
passed to pin 91 of the CPU, where it is used to determine when
LMC6034 op-amp IC.
a channel is “busy” for the purpose of controlling the squelch.
The thresholds for open and closed squelch are controlled by
software.
signal which otherwise would cause interference with the CTCSS
tones.
For narrowband models, the crystal and ceramic filters are
TX3800
an active high pass filter with a corner frequency of 300 Hz. This
suppresses low frequency voice components of the microphone
Narrowband Changes
changed for narrowband equivalents at the same centre
The first two gain blocks U701C and U701D are configured as
The third gain block U701A provides the 6dB per octave pre-
Service Manual
Page 8
emphasis slope required for FM modulation. Selcall tones and
power amplifier by its power control terminal pin 2. Therefore the
external audio (from J801) are injected before this block by R727
output power can be adjusted by the CPU via the DAC and the
and R730 respectively. The microphone amplifier operates from
negative feedback loop will maintain a constant level.
the unswitched +8V rail and therefore U502D is required in order
to mute the output during RX as to prevent unwanted noise
RF Power Amp
modulating the VCO.
Antenna Switch
U602
The final gain block is a third order low pass filter. For data
Diode
Detector
transmission, the cutoff frequency of the filter can be shifted higher
by switching off Q703 and Q704 from pin 51 of the CPU.
U603
DAC
CPU
U801
The peak deviation is set by RV701 and Q702, the latter of which
U805
reduces the peak deviation from 5 kHz to 2.5 kHz for narrowband
channels.
Connector J801 offers a wideband audio interface which is used
Revision Changes
when the radio is configured for data or repeater functionality. The
The information thus far is relevant to the Rev. 4 PCB. The Rev. 2
usage of this connection is as follows:
PCB has the following differences:
•
Level - 0.5VP (1VPP) for nominal deviation (3 kHz / 1.5 kHz)
•
•
RX audio gated by noise/CTCSS mute
•
RX/TX frequency response - flat FM 30 Hz -> 3 kHz +1/-3
The PLL IC U501 is of type UMA1021M, it has a different
pinout as shown on the circuit diagram.
dB (no CTCSS filter)
•
The audio power IC U401 is of type TDA1015, which has a
different pinout as shown on the circuit diagram.
•
RX audio output impedance - 1.5k
RH003 Remote Head
•
TX audio input impedance - 47k
In the case of the modular series, the RH003 remote head
Note: the audio input (pin 6 of LE003) is provided for connection
to external data modems. It is not intended as an alternative
is connected to the radio and is designed to replicate the
functionality of the front panel used in the compact series.
microphone input. If it is to be used as a microphone input, the
The remote head is controlled by its onboard microprocessor
external circuit should contain:
U101. The CPU is the same type as that used on the main board
•
+6 dB/octave pre-emphasis
•
300 Hz CTCSS highpass filter
•
Additional gain
but is programmed to detect all of the control functions of the
front panel including the channel switch and the PTT and CALL
buttons. These commands are passed to the main unit CPU via
a two wire serial connection within the remote connecting cable.
The volume control and ON/OFF switch feed directly into the
TX Driver and Output Stages
remote cable. The LCD is also controlled by the remote unit CPU.
Reset Circuit
The transmitter driver U601 is driven by the RF output from the
VCO buffer stage. DC supply voltage for U601 is obtained from
Similar to the main board, a 5V regulator U102 and reset device
the +8V TX line via series decoupling resistor R603.
U103 are included on the remote unit to power the CPU and
The RF output from pin 4 of U601 is coupled to pin 1 of the RF
power module U602 by C603. The DC supply to pin 3 of the power
module is obtained from the +FILT supply via L603. The high power
ensure that it does not turn on with a supply voltage below 4.25V.
In such circumstances, the reset pin is held high.
Microphone Audio
output at pin 4 of U602 is directed into the antenna switch and low
The microphone signal is amplified by the preamp Q201 and is
pass filter.
then connected to the main board at pin 3 of connector J203.
Power Control
Remote Head Connections
The output from U602 is passed through a diode detector
to obtain a value that is proportional to the RF power. It is
A cable is connected from J203 on the RH003 remote head to
connected to the comparator U603A via the buffer U603B. The
connector J901 on the main board. It carries the 13.8V switched
comparator takes its reference input from pin 14 of the DAC
supply, microphone audio, receive audio with volume control and
U805. The difference of these levels is used to control the RF
the two serial data lines between the main board and remote
TX3800
Service Manual
Page 9
unit CPUs. The front panel unit consists of two printed circuit
boards. They are connected by a 20 pin connector and create
MC522BC Remote Microphone
an interface between the main board, front panel main board and
The remote microphone unit MC522BC functions as a
the front panel CPU/LCD board.
replacement for the RH003 and microphone combination. The
MC522BC is controlled by a local microprocessor U101 which
facilitates the button functionality and controls the LCD.
J901
1
2
3
4
5
6
7
8
Electronic Volume Control
CPU RX
CPU TX
Mic In
GND
Audio Out
Audio In
+13.6V Switched
+13.8V DC
The M61545AFP IC, U105 is utilised to control the audio output
volume of the TX3800 main board. The volume up and down
buttons – SW103 and SW104 respectively – are connected to
the CPU U101. The onboard software increments/decrements a
register depending on which button is pressed. The value stored
by this register is output in serial form at pin 53 to pin 4 of U105.
TX3800 Main PCB
This controls an onboard reference amplifier which will attenuate
the audio signal as it passes between pins 1 and 2.
J903
1
2
3
4
5
6
7
8
Power Switching
+13.8V DC
+13.6V Switched
Audio In
Audio Out
GND
Mic In
CPU TX
CPU RX
The MC522BC uses the momentary switch SW111 to turn on
both itself and the base unit. When the switch is pressed, pass
transistor T1 conducts and therefore provides a +13V DC supply
at the input of the local voltage regulator U102. The CPU begins
its initialisation sequence. The interrupt pin 19 is held low by
transistor T2, causing an assertion of pin 55 – once initialisation
TX3800 Front Connector
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CH DN
CH UP
QUIET
PRIORITY
+5V
+13V SW
TX
DGND
RX
CALL
PTT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J101
transistor Q1. This pass transistor will therefore conduct and
supply a stable +13V DC supply to the onboard backlights and
the base unit via connector J203.
Capacitor C14 is required in case of a disconnection from
the base unit. It stores sufficient charge as to power up the
Front Panel Connector
Remote Connector
J202
is complete – and therefore applying sufficient gate voltage to
MC522BC upon reconnection to the base unit.
LCD Backlights
The onboard CPU U101 controls the backlights for the
MC522BC. Pin 18 provides the input bias rail for the backlight
LEDs. Pins 16 and 17 select the green and red LEDs respectively.
The supply voltage for the LEDs is obtained from the stable
supply marked ‘+13VSWa’ on the schematic.
MC540BC Keypad Microphone
The MC540BC microphone acts as a replacement for one of the
standard microphones. It is used in conjunction with the compact
model or the base model with an RH003.
Power is derived from the radio via pin 1 of the connector J1.
This +5V supply is used to power the microprocessor U1 and the
dual colour backlight LEDs LD1-LD6.
The keypad is connected as a matrix in which the microprocessor
scans the pin combinations in order to determine which button is
currently depressed.
TX3800
Service Manual
Page 10
Alignment Procedure
Connecting the Radio
General
Setup
GME mobile radios utilise a serial two wire interface for
The DB25 end of the LS1A cable connects to a PC serial port.
programming. A GME programming cable assembly is required to
If the PC is fitted with a 9-pin RS232 connector, the LS1A is
connect the radio to the PC. This assembly consists of an LS1A
connected to the PC using a standard 9-pin to 25-pin converter
cable/level converter, and a suitable radio specific programming
(supplied with LS1A).
adaptor - as detailed below:
Note: For use with USB ports, a USB to Serial adaptor may be
Adaptor
Usage
Type
LS1A & LS002
Compact PMR, Base PMR (with RH003
attached)
6 pin
LS1A & LS003
Base PMR (without RH003 attached),
Telemetry
8 pin
LS1A & LS004
Flash Programming Only
10 pin
used, whilst ensuring that:
•
The latest XP compatible drivers are installed for the adaptor.
•
The USB adaptor provides full RS232 level signals. The LS1A
cable uses the RS232 handshaking signals as a DC supply
for the circuit in the DB25 plug and requires standard RS232
levels for correct operation.
The LS002 is connected in the same manner as the standard
microphone:
Installing the Radio Programmer
The latest Radio Programmer software is available in an installer
package and can be downloaded from the service area of the
GME web site.
The LS003 is connected to the base unit in the same manner as
the RH003 or MC522:
Running the Radio Programmer
•
Switch on the radio after connecting it to the serial port.
•Open the Radio Programmer software.
•
To select the correct serial port, choose ‘Com Port’ in the
‘Edit’ drop down menu and select the appropriate port.
The LS004 is connected to the main board at connector J802
coM1
(see PCB layout).
LS1A
LS002
TX3800
Pc running Radio Programmer
TX3800
Service Manual
Page 11
Software Upgrade
Required Equipment
4.
Wait until all eight stages of the process are completed -
•
PC running the TX3800 Radio Programmer
•
13.6V DC power supply
5.
•
Programming cable (LS1A and LS004)
Notes
indicated by a green light next to each stage.
Setup
1.
•Do not switch off or disconnect the radio during update
procedure. Any interruption will cause the software to
Connect the TX3800 (from connector J802) to the PC using
become corrupted.
the programming cable.
2.
Run the TX3800 Radio Programmer application.
3.
Click ‘Hardware’ to open the Hardware Edit section.
4.
Click the ‘Upgrade Radio Software’ tab.
Procedure
1.
Switch on the TX3800.
2.
Click ‘Upgrade’ in the dealer software.
3.
Select the appropriate flash ROM file.
TX3800
Turn off the TX3800 and disconnect the programming cable.
•
If programming is interrupted for any reason, please contact
an authorised GME service centre for assistance.
•
After a software upgrade it is advisable to load the default
configuration files for the appropriate radio model. This is
particularly important if changing between functions (PMR,
telemetry and data).
Service Manual
Page 12
VCO Control Voltage Check
Required Equipment
•CRO or DVM for measuring VCO Control Voltage (CV)
•
Service Monitor
•
PC running the TX3800 Radio Programmer
•
13.6V DC power supply
•
Programming cable
Setup
1.
Connect the TX3800 antenna connector to the service
monitor using a good quality antenna cable.
2.
Connect the TX3800 to the PC using the programming
cable.
1.
Select the 450 MHz alignment channel.
2.
Ensure that the VCO CV is between 0.6 and 1.2 VDC in
receive.
3.
Run the TX3800 Radio Programmer application.
4.
Using the ‘Channel Data’ section, add channels at 450 and
520 MHz.
3.
Click ‘Transmit On’ to transmit.
4.
Ensure that the VCO CV is between 0.6 and 1.2 VDC in
transmit.
5.
Click ‘Hardware’ to open the ‘Hardware Edit Screen’.
6.
Select ‘Align Radio’ tab.
7.
Click ‘Align Radio’ to enter the ‘Tune Radio’ screen.
8.
Measure the VCO CV at the test point (from the top side see right).
Procedure
5.
Repeat these steps at 520 MHz, ensuring that the control
voltage is between 3.6 and 4.3 VDC.
Note
The VCO CV is aligned during manufacture and should not need
to be re-aligned during service. Commonly the VCO faults can be
found elsewhere in the VCO/PLL section.
TX3800
Service Manual
Page 13
Reference Frequency Alignment
Required Equipment
Procedure
•
Service Monitor
1.
Select the 500 MHz channel using the channel buttons.
•
PC running the TX3800 Radio Programmer
2.
Click ‘Transmit On’ to transmit.
•
13.6V DC power supply
3.
Select ‘Frequency’ tab.
•
Programming cable
4.
Adjust ‘PLL Reference Crystal Align’ until the service monitor
reads 500.000 MHz ± 200 Hz.
Setup
1.
Connect the TX3800 to the service monitor using a good
quality antenna cable.
2.
Connect the TX3800 to the PC using the programming
cable.
5.
Click ‘Transmit Off’ to cease transmitting.
6.
Select the 500.00625 MHz channel.
7.
Click ‘Transmit On’ to transmit.
8.
Adjust ‘6.25 kHz Offset Align’ until the service monitor reads
500.00625 kHz ± 200 Hz.
3.
Run the TX3800 Radio Programmer application.
4.
Using the ‘Channel Data’ section, add channels at 500 and
Notes
500.00625 MHz.
•
If testing a bare TX3800 PCB, connect the service monitor
using a flying lead to the RF module input pad.
5.
Click ‘Hardware’ to open the ‘Hardware Edit Screen’.
6.
Select ‘Align Radio’ tab.
7.
Click ‘Align Radio’ to enter the ‘Tune Radio’ screen.
•Do not change the ‘PLL Reference Crystal Receiver Offset’
value from the factory default - it should read ‘0’.
•Do not change the ‘Temperature Compensation Gain’ from
the factory default- it should read ‘100%’.
TX3800
Service Manual
Page 14
Front End Band Pass Alignment
Required Equipment
Procedure
•
Service Monitor
1.
Select the 450 MHz channel.
•
PC running the TX3800 Radio Programmer
2.
Inject a 450 MHz carrier signal from the service monitor.
•
13.6V DC power supply
3.
Select RSSI Polling in order to allow continuous RSSI reading.
•
Programming cable
4.
Adjust T1, T2 and T3 in the 450 MHz row to achieve a maximum
RSSI reading.
Setup
1.
2.
5.
Connect the TX3800 to the service monitor using a good
Repeat these steps at 470, 500 and 520 MHz.
quality antenna cable.
Notes
Connect the TX3800 to the PC using the programming
•Do not modify the ‘Notch’ values during band pass
alignment.
cable.
•
3.
Run the TX3800 Radio Programmer application.
4.
Using the ‘Channel Data’ section, add channels at 450, 470,
500 and 520 MHz.
lead is connected from the ‘RF Test’ output on the board to the
service monitor. The injected signal can be generated using a
tracking generator..
5.
Click ‘Hardware’ to open the ‘Hardware Edit Screen’.
6.
Select ‘Align Radio’ tab.
7.
Click ‘Align Radio’ to enter the ‘Tune Radio’ screen.
8.
Select the ‘Receiver’ tab.
TX3800
To control the shape of the bandpass filter response, a flying
Service Manual
Page 15
Front End Notch Alignment
Required Equipment
Procedure
•
Service Monitor
1.
Select the 450 MHz channel using the channel buttons.
•
PC running the TX3800 Radio Programmer
2.
Input a modulated signal at the first image response of the
•
13.6V DC power supply
•
Programming cable
radio. This is 90 MHz lower than the alignment frequency (360
MHz in this case).
3.
Set the RF level to -20 dBm.
Setup
4.
Select RSSI Polling in order to allow continuous RSSI reading.
1.
5.
Adjust the ‘Notch’ value corresponding to 450 MHz as to obtain
Connect the TX3800 to the service monitor using a good
the best possible rejection of the modulated signal. This is
quality antenna cable.
2.
verified by obtaining a minimum RSSI reading.
Connect the TX3800 to the PC using the programming
cable.
6.
3.
Run the TX3800 Radio Programmer application.
Note
4.
Using the ‘Channel Data’ section, add channels at 450, 470,
Do not modify the T1, T2 and T3 values during the notch
500 and 520 MHz.
alignment.
5.
Click ‘Hardware’ to open the ‘Hardware Edit Screen’.
6.
Select ‘Align Radio’ tab.
7.
Click ‘Align Radio’ to enter the ‘Tune Radio’ screen.
8.
Select the ‘Receiver’ tab.
TX3800
Repeat these steps at 470, 500 and 520 MHz.
Service Manual
Page 16
TX Output Power Alignment
Required Equipment
Procedure
•
Service Monitor
1.
Select the 450 MHz channel using the channel buttons.
•
PC running the TX3800 Radio Programmer
2.
Click the ‘Transmit On’ button to transmit.
•
13.6V DC power supply
3.
Adjust ‘TX Power 450 MHz High’ until the service monitor
•
Programming cable
reads 25W ± 2.5W.
Setup
1.
2.
4.
Repeat these steps for the other three frequencies.
5.
Repeat these steps for the same frequencies in ‘TX Low
Connect the TX3800 to the service monitor using a good
Power’ mode and adjust ‘TX Power Low’ until the service
quality antenna cable.
monitor reads 5W ± 0.5W.
Connect the TX3800 to the PC using the programming
cable.
3.
Run the TX3800 Radio Programmer application.
4.
Using the ‘Channel Data’ section, add channels at 450, 470,
500 and 520 MHz - at ‘TX Low Power’ and ‘TX High Power’.
5.
Click ‘Hardware’ to open the ‘Hardware Edit Screen’
6.
Select ‘Align Radio’ tab.
7.
Click ‘Align Radio’ to enter the ‘Tune Radio’ screen.
8.
Select the ‘Transmit’ tab.
TX3800
Service Manual
Page 17
Abridged Parts List
Main PCB
Part Number
Description
Circuit Reference
Transistors
772SC4226
772SK360
773SK241
77BC807W
77BC817W
77BC847BW
77BC857CW
77BFG520
77PDTA114E
77PDTC114T
Standard 2SC4226
MOSFET Single Gate 2SK360
GASFET Dual Gate 3SK241
PNP BC807W
NPN BC817W
NPN BC847W
PNP BC857CW
NPN BFG520
PNP Digital PDTA114E
NPN Digital PDTC114T
77PDTC144E
772SJ349
NPN Digital PDTC144E
MOSFET P-Channel 2SJ349
Q101, Q102, Q103
Q240
Q230
Q53, Q54, Q81
Q82, Q603
Q72, Q104, Q501, Q502
Q91, Q92, Q801, Q802
Q201
Q503
Q105, Q351, Q361, Q362, Q441, Q442, Q602, Q702, Q703, Q704,
Q803
Q51, Q52, Q55, Q56, Q85, Q363
Q71
Diodes
771SV231
771SV276
771SV304
77BA591
77BAS316
77BAV70W
77BAV99W
77MA4P1250
77PS76SB17
77SMBJ16
771N5404
Varicap VHF 1SV231
Varicap UHF 1SV276
Varicap UHF 1SV304
Switching BA591
Standard BAS316
Dual BAV70W
Dual BAV99W
RF MA4P1250
Schottky PS76SB17
Uni-Directional SMBJ16
Standard 1N5404
D501
D102, D104, D105, D202, D210, D211, D212
D101, D103
D106, D608
D301
D81, D82, D85, D801
D71, D201, D241, D302, D802, D803, D804, D805, D806
D602, D603
D604, D605
D51
D50
Integrated Circuits
775278L05M
7793LC86SN
77HEF4066
77L78M08
77LM358D
77LMC6032M
77LMC6034M
77LMX2306
77M16C62F1
77M51943A
77M62354GP
77MAX202CS
77TK10487M
77UPC2710B
77TDA1517N
77R30H4452
5V Regulator 78L05
EEPROM 93C86
Quad Switch HEF4066
8V Regulator 78M08
Dual Op-Amp LM358D
Dual Op-Amp LMC6032M
Quad Op-Amp LMC6034M
PLL LMX2306
Microprocessor
System Reset M51943A
DAC M62354GP
Line Driver MAX202CS
IF/FM Demodulator TK10487M
RF Amplifier UPC2710B
Audio Power Amplifier TDA1517N
RF Power Module RA30H4452M
U804
U803
U502
U52
U603
U351
U701
U501
U801
U802
U805
U841
U301
U601
U401
U602
Crystals and Resonators
10B035
10A007
10A009
81C0003
10B022
10B032
10C009
10C014
12A015
12A016
12D102
12D122
12D150TY
12D220
12D222
12D331
12D331TY
12D471
Crystal 16 MHz
Filter 455 kHz
Filter 455 kHz
RF Coil
Crystal 12.8 MHz
Crystal 44.545 MHz
Crystal Filter 45 MHz
Crystal Filter 45 MHz
EMC Ferrite
EMC Ferrite
Inductor 1uH
Coil Inductor 1.2uH
Coil Inductor 15nH
Coil Inductor 22nH
Inductor 2.2uH
Inductor 330nH
Coil Inductor 330nH
Inductor 470nH
XT801
CF301 (WB)
CF301 (NB)
TR301
XT1
XT301
XF201 (WB), XF202 (WB)
XF201 (NB), XF202 (NB)
L604
L51, L603
L242 (NB), L251 (NB)
L241 (NB)
L201
L102, L231, L601
L232, L241 (WB)
L100, L101
L103, L105, L106, L206
L302
TX3800
Service Manual
Page 18
12E39110
12FA03T
12FA04T
Inductor 390nH
Inductor Coilcraft A03T
Inductor Coilcraft A04T
L602
L203, L204, L205
L202, L605, L606, L607, L608, L609
Miscellaneous Components
720014
730054
730065
730070
730076
730081
730093
41B0145
67RA102
67RA104
Speaker
Extension Speaker Socket
8 Pin Connector
26 Pin Connector
10 Pin Connector
3 Pin Connector
Antenna Socket BNC
DC Flylead
Resistor Array 1k x 4
Resistor Array 100k x 4
J401
J901
J801
J802
J803
ANT
SK1
RA1, RA2, RA3, RA4
RA5, RA12
Hardware
46A0414
46A0415
46A0303
Chassis Machined
Top Cover
Bottom Cover
Front Panel
Transistors
77BC847BW
NPN BC847W
Q101, Q201
Diodes
77BAV99W
77KA9219
Dual BAV99W
LED Dual Backlight
D201, D202
D101, D102
Integrated Circuits
777S08
77T3K4HV3
775278L05M
77M51943A
AND Gate NC7SZ08
Microprocessor
5V Regulator 78L05M
System Reset M51943A
U201
U101
U102
U103
Crystals and Resonators
10S040
Crystal 4 MHz
XT101
Miscellaneous Components
170014
660099
67RA102
730058
560043
710032
730050
730065
41B0108
61A0603
730063
61A0358
580158
LCD
Zebra Connector
Resistor Array 1K x 4
20 pin Connector
Volume ON/OFF Potentiometer
Channel Switch
Mic Socket
8 pin Connector
Main Unit Harness 8 Way
Front Panel Remote Blank
RJ45 8 Way Socket
Front Panel
Mylar Connecting PCB
LCD101
Hardware
370012
370013
660091
46A0444
660098
61A0271
510022
Channel Knob
Volume Knob
Front Panel Gasket
LCD Holder
Keypad
LCD Frosting
Volume/Channel Nut
RA101, RA102
J101, J202
SW106
SW105
J201
J203
MC522BC
Transistors
77NDS8434A
77BC847BW
77PDTC114T
77BC857CW
TX3800
MOSFET Power NDS9434A
NPN BC847W
NPN Digital PDTC114T
PNP BC857CW
Service Manual
Q1
Q201, Q831, Q832, Q833, Q834, T2, T3
Q4
T1
Page 19
Diodes
77BAS316
77LEDGR100
Standard BAS316
LED Bi-Colour
D1, D2, D3
LD800, LD801, LD802, LD803
Integrated Circuits
77M38C29HP
775278L05M
77M51943A
7724LC00T
77M61545AF
Microprocessor
5V Regulator 78L05M
System Reset M51943A
EEPROM 24LC00T
Volume Control M61545AFP
U101
U102
U103
U104
U105
Crystals and Resonators
10B033
Crystal 8 MHz
XT101
Miscellaneous Components
710046
730102
730081
73028
730111
730112
67RA102
170025
41B0178
61A0623
660147
450021
660184
660203
Switch CALL/PTT
2 pin Connector
3 pin Connector
2 pin Connector Edge
8 pin Connector Side Entry
28 pin Connector
Resistor Array 1K x 4
LCD
Curly Cord
Backlight
Call Button
Electret Mic
Keypad
Keypad PTT
SW1, SW2
EL1
SK802
J803
J203
LC101
RA1, RA2
Hardware
660128
61A0516
46A0457
61A0620
61A0894
61A0622
660223
Sponge Adhesive Block
PTT Activator
Bollard
Rear Cover
Front Cover
LCD Holder
O-Ring
MC540BC
Transistors
77BC847BS
NPN Dual BC847BC
DQ1
Diodes
77BAV99W
77KPTBMGKC
Dual BAV99W
Dual LED
D2
LD1, LD2, LD3, LD4, LD5, LD6
Integrated Circuits
77ATT2313S
Microprocessor
U1
Crystals and Resonators
10B054
Crystal 4.9152 MHz
XT1
Miscellaneous Components
710046
660147
450021
660168
660171
41B0174
Switch CALL/PTT
Call Button
Electret Mic
Keypad
Keypad PTT
Curly Cord
SW1, SW2
Hardware
61A0516
46A0457
61A0523
61A0522
PTT Activator
Bollard
Front Cover
Rear Cover
TX3800
EL1
Service Manual
Page 20
Component Pinouts
4
5
RF Ground
RF Output
RF Input
3
Drain Bias
2
Gate Bias
1
Osc Input
Osc Output
NC
Mixer Output
VDC
IF Input
Decoupling
Decoupling
Phase Shift
Quad Coil
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RF Input
Ground
Hysteresis Control
Scan Control
Scan Control
Squelch Input
Filter Amp Output
Filter Amp Input
RSSI
AF Output
RA30H4452M
TX Power Module
TK10487
IF / FM Detector
2
Input 1
2
1
1
6 Vcc
Ground 2
5 Ground
Ground 3
4 Output
UPC2710TB
Bottom View
Fast Lock
CP Out
CP Ground
Analog Ground
RF In B
RF In A
Analog Vdd
Reference Input
3
3
BAV99
BAV70W
E
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
CP Power
Digital Vdd
MUX Output
Load Enable
Data
Clock
Enable
Digital Ground
C
93C86
EEPROM
8
7
6
5
Vcc
Program Enable
Organization
Vss
S
2SK360
G
D
S
1
2
3
4
BC857CW
2SC4226
BC847BW
BC817W
BC807W
PDTC114�
PDTA114E
D
LMX2306
PLL Frequency Synthesizer
Chip Select
Clock
Data In
Data Out
B
Data Output
LD
Clock
Data Input
Ao1
Ao2
NC
GND
1
2
3
4
5
6
7
8
G
24
23
22
21
20
19
18
17
Vcc
VDD
Ao6
Ao5
Ao4
Ao3
NC
Vss
M62354GP
D-A Converter
TX3800
Service Manual
Page 21
9
Preamp Input
8
Mute
7
Vcc
6
1. V Out
2. Gnd
3. V In
Preamp Output
1
5
Power Ground
4
Power Amp Output
M5278L05
5 Volt Regulator
2
3
Supply Ripple Rejection
2
Signal Ground
1
Power Amp Input
3
Output A
Inv Input B
Non Inv Input A
V-
TDA1517N
Audio Power Amp
1. Vdd
2. Gnd
3. Output
1
8
7
6
5
1
2
3
4
2
3
M51943A
System Reset
V+
Output B
Inv Input B
Non Inv Input B
LM358 & LMC6032
Dual Op Amp
Output 1
Inv Input 1
Non Inv Input 1
V+
Non Inv Input 2
Inv Input 2
Output 2
14
13
12
11
10
9
8
1
2
3
4
5
6
7
Output 4
Inv Input 4
Non Inv Input 4
VNon Inv Input 3
Inv Input 3
Output 3
C1+
V+
C1C2+
C2VDout2
Rin2
LMC6034
Quad Op Amp
I/O 1
I/O 1
I/O 2
I/O 2
Enable 2
Enable 3
Vss
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1
2
3
4
5
6
7
8
MAX202CS
Line Driver
VDD
Enable 1
Enable 4
I/O 4
I/O 4
I/O 3
I/O 3
4
3
1
HEF4066
Quad Switches
2
1.
2.
3.
4.
Collector
Base
Emitter
Emitter
D
5 Vcc
4 NC
24LC004/OT
Serial EEPROM
1
2
3
4
1
2
3
Gate 4
8
7
6
5
Vin 2
Vout 2
Vcc
Clock
8
7
6
5
S
2SJ349
1. Gate
2. Drain
3. Source
Drain
NDS8434A
P-Channel Enhancement MOSFET
TX3800
D
3SK241
M61545AFP
Electronic Volume Control
Source
G1
G1
BFG520
Vin 1
Vout 1
Ground
Data
G2
G2
S
SCL 1
Vss 2
SDA 3
Vcc
Ground
Dout1
Rin1
Rout1
Din1
Din2
Rout2
16
15
14
13
12
11
10
9
Service Manual
3
1 2
Page 22
1
28
LCD Pinout
S5
S C A N
S1
S2
S3
S4
CALL TO FROM
Q M
Digit 5
Digit 6
Digit 2
Digit 7
S8
S10
S11
15
14
Digit 4
BUSY Tx
DUP QUIET
T/A SILENT
S7
Digit 1
Digit 3
S9
S6
S12
BP1
BP2
BP3
BP4
TX3800
PIN1 PIN2 PIN3 PIN4 PIN5 PIN6 PIN7 PIN8 PIN9 PIN10 PIN11 PIN12 PIN13 PIN14
COM1 ---------S8
D2A
S6
D1A
S7
D7J
D7A
S11
S4
D6J
PIN15 PIN16 PIN17 PIN18 PIN19 PIN20 PIN21 PIN22 PIN23 PIN24 PIN25 PIN26 PIN27 PIN28
D6A S12
S10
D5J D5A
S9
S3
D4J
D4A
S2
S1
D3J
D3A
S5
PIN1
---PIN15
D6I
PIN2 PIN3 PIN4 PIN5 PIN6 PIN7
COM2 ------D2B D2F D1B
PIN16 PIN17 PIN18 PIN19 PIN20 PIN21
D6H
D5B D5K D5I
D5H D4B
PIN8 PIN9 PIN10 PIN11 PIN12 PIN13 PIN14
D1F D7B
D7K
D7I
D7H
D6B
D6K
PIN22 PIN23 PIN24 PIN25 PIN26 PIN27 PIN28
D4K
D4I
D4H
D3B
D3K
D3I
D3H
PIN1 PIN2 PIN3 PIN4 PIN5 PIN6 PIN7 PIN8 PIN9 PIN10 PIN11 PIN12 PIN13 PIN14
------- COM3 ---D2G D2E D1G D1E D7L
D7M
D7G
D7F
D6L
D6M
PIN15 PIN16 PIN17 PIN18 PIN19 PIN20 PIN21 PIN22 PIN23 PIN24 PIN25 PIN26 PIN27 PIN28
D6G D6F D5L D5M D5G D5F D4L D4M D4G D4F
D3L
D3M
D3G
D3F
PIN1 PIN2 PIN3 PIN4
---------- COM4
PIN15 PIN16 PIN17 PIN18
D6N D6E D5C D5D
PIN5
D2C
PIN19
D5N
PIN6
D2D
PIN20
D5E
PIN7
D1C
PIN21
D4C
PIN8
D1D
PIN22
D4D
PIN9 PIN10 PIN11 PIN12 PIN13 PIN14
D7C D7D
D7N
D7E
D6C
D6D
PIN23 PIN24 PIN25 PIN26 PIN27 PIN28
D4N
D4E
D3C
D3D
D3N
D3E
Service Manual
A
B
F
G
C
E
D
A
F
I
H
N
B
K
G
E
J
M
L
C
D
Page 23
PCB Layouts
Top Layer
Middle Layer
Bottom Layer
Mechanical Layer
TX3800 Main PCB (Rev.4)
TX3800
Service Manual
Page 24
Top Layer
Middle Layer
Bottom Layer
Mechanical Layer
TX3800 Main PCB (Rev.2)
TX3800
Service Manual
Page 25
TX3800 Remote Front Panel PCB
TX3800 Remote Main PCB
Top Layer
TX3800
Bottom Layer
Service Manual
Mechanical Layer
Page 26
Top Layer
Bottom Layer
Mechanical Layer
MC522BC PCB
TX3800
Service Manual
Page 27
Top Layer
Bottom Layer
Mechanical Layer
MC540BC PCB
TX3800
Service Manual
Page 28
Speaker
J901
+13.8V
Front Panel Connector
TX3800
Service Manual
U401
Q71
Error Amp
Q72
Audio Power Amp
Audio Out
Audio In
+13.6V Switched
+FILT
U701C/D
+FILT Reg
+5V
U802
U52
+8V Reg
Mute
Switch
U502
+8V
U351B
+8V TX
+8V TX
Switch
U701A
+8V RX
+8V RX
Switch
U701B
3.5 kHz LPF
Audio Preamp
U351A
CTCSS Amp
Pre-emphasis & Clipper
Low Volts Check
+FILT
300 Hz HPF
5V Reg
U804
Q801/2
Flash Programming
+5V
MOD
RV701
Mic Mute
CPU RX
CPU TX
Reset
+8V
U301
Crystal Filter
XT301
Loop
Filter
U501
PLL
Modulation
+5V
U801
IF/FM Demodulator
BAL
Frequency
RV531
Q501
Oscillator
XT801
MICROPROCESSOR
U803
EEPROM
Buffer
Q240
Q102/103
Buffer
Crystal Filter
45 MHz IF
1st Mixer
LO
Q230
+8V TX
U601
RF Driver
VCO Control Voltage
Q101
VCO
+8V
U841
Line Driver
LNA
Q201
+8V RX
TX/RX Switch
Bandpass Filter
RF Power Control
U603
Envelope
Detector
LPF
TX3800 Block Diagram
Bandpass Filter
DAC
U805
U602
RF Power Amp
+FILT
J801
Telemetry
Beep Tones
CTCSS RX
RSSI
Noise Volts
Audio Unmute
Power Fail
J802
Antenna
Block Diagrams
Page 29
TX3800 Remote Front Panel
+13V
5V Reg
U102
Reset
U103
XT101
Low Volts Check
LCD
+5V
J101
CH Phase A
CH Phase B
Push A
Push B
TX
RX
Call
PTT
MICROPROCESSOR
U101
F1
LCD
Backlights
F2
F3
F4
J202
Channel Switch
Push A
Phase A
+13V
J201
PTT
Call (& PRI, UP/DOWN)
RS232 TX
RS232 RX
MIC
Phase B
J203
U201
Preamp
Q201
Volume
+13V SW
On/Off
Push B
Volume & On/Off Switch
TX3800 Remote Main PCB
TX3800 Remote Unit Block Diagram
Low Volts Check
+13V A
5V Reg
U103
U102
RESET
XT101
LCD
+5V
A
F1
CALL
PTT
VOL DN
CH DN
F2
F3
CH UP
VOL UP
F4
MICROPROCESSOR
U101
Green
Backlights
CLOCK
DATA
Power ON
+13V
U104
EEPROM
+13V
Q1
Red
Backlights
Pass Transistor
T1 & T2
PWR
Power ON sense
+13V A
Volume Control
U105
Power Switch
RS232 RX
RS232 TX
MIC
Preamp
Q201
J203
Mic +20dB
Audio Out
Audio In
+13V Unswitched
+13V
MC522BC Block Diagram
TX3800
Service Manual
Page 30
41B0127
10pin Plug
1
2
3
4
5
6
7
8
2
1
8
7
6
5
4
3
2
1
R415
10R
C413
100n
C52
33n
R407
10K
4
R411 R405
not_fitt. 1K8
C414
470u/16V
RV402
10K
R414
22K
Out1
R413
10K
C53
220u/35VL
C417 C410
100n 470u/16V
D51
SMBJ16
PWR On
JMP1
41B0108
Cable Assembly
1
2
3
4
5
6
7
8
CN901'
41B0129
Cable Assembly
3
2
1
CN803
C412
10u/16V
1
2
3
4
5
6
7
8
R412
33K
In1
3
2
1
1
C408
10n
C702
1n
R703
100R
Mic In
R75
3K3
C405
10n
U401A
TDA1517N
C407
22n
Q442
PDTC114TU
1
2
3
4
C703
100n
R410
1K
R406
2K2
0R
7
Vin
R93
10K
C704
100n
C75
10u/16V
6
R409
1K5
Q71
2SJ349
Out2
U401B
TDA1517N
C59
47p
C73
0.47u/25V
R404
33K
22n
C807
In2
10n
10n
C402
C422
1n
C356
4u7/10V
1K
R401
22K
R419
3
S3
R418
1M
100n
R53
1K
R54
1K
13
R359
2K2
7
68K
R373
U351B
LMC6032
U502A
HEF4066
S1
VSRIn
S2
VSROut
100R
R357
10K
R391
4
4K7
4K7
4K7
R805
R807
R808
C710
100p
R717
10K
C715
10n
R731
1M
R58
1K
R59
1K
C58
10n
3
Q362
PDTC114TU
PDTC114TU
C362
C350
1n
C319
1n
100K
R314
8
7
6
5
15p
C815
R803
10K
Q803
PDTC114TU
R311
3K3
Q351
R351
2K2
C310
22n
C308
22n
R312
not_fitt.
R313
not_fitt.
R358
1K5
R350
19
1K
11
12
R533
2K2
R802
10R
C806
22p
XT801
16MHz
C803
100n
+5V
C805
22p
Gnd
AF
10p
C307
R303
10K
RSSI
R302
1K
R307
22K
8
+5V
R516
2K7
OSCin
C304
100n
C519
10n
C515
22n
C312
2p2
560K
R304
C313
100n
R306
3K3
R519
10R
C305
100n
C303
100n
C520
22n
R514
10K
C504
100n
R525
2K7
C725
100n
C521
1n
R518
not_fitt.
R526
10K
Noise Volts
C316
4u7/10V
CF301
CFWM455E
+5V
Q502
BC847BW
U501
LMX2306
C512
100n
R524
1K
C311
1n
U301
TK10487
R331
5K6
C509
100p
R506
330R
+8V
Vcc
L302
470nH
C331
1n
C302
68p
C301
22p
5
C252
10n
20
BAS316
D301
R300
22K
RFin
R305
1K
R309
330R
R726
100K
R510
2K7
R517
100K
C513
2u2/10V
1K8
R509
U801
M30620
P97 ADtrig
AVcc
Vref
P100 AN0
AVss
P101 AN1
P102 AN2
P103 AN3
P104 AN4 KL0
P105 AN5 KL1
P106 AN6 KL2
P107 AN7 KL3
P00 D0
P01 D1
P02 D2
P03 D3
P04 D4
P05 D5
P06 D6
P07 D7
link: Rev4 PCB
TX Selcall
TX CTCSS
C804
100n
Q503
PDTA114EU
C809
100n
R515
10R
+5V
PLL UnLock
TX Disable
D302
BAV99W
DA4
C320 C321
100n 100n
R308
47K
'Bal'
RV531
10K
C510
47p
R503
2K2
C533
1u/50V
C503
100p
TR301
455kHz
C317
22n
R532
10K
R501
33K
C502
150p
C120
15n
Q702
PDTC114TU
R502
22K
Q501
BC847BW
C500
100n
+8V TX
+8V
'Mod'
RV701
10K
1K
1SV231
C532
100p
R728
820R
R725
D501
C531
100p
PDTC114TU
C351
100n
C352
100n
C353
1n5
8n2
33K
R352
4u7/10V
C355
10K
'Mute'
RV301
4K7
1n
C534
R531
10K
R534
100K
10R
R505
XT1
12.8MHz
S5
Gnd
+5V
C729
22n
C712
1n
22K
R723
VsSupply
S6
+8V
VCC
NC
ORG
GND
Beep Tones
Audio Unmute
93C86
CS
CLK
DI
DO
U803
Q704
PDTC114TU
U701B
LMC6034
10K
22K
C711
3n3
R722
C714
8n2
R732
1M
Audio IC Disable
RLED Drive
GLED Drive
Alarm Input
Alarm Latch
Alarm Drive
Mic Mute
Audio IC Mute
TX On
RX On
R721
R356
R354
470K
R809
1K
1
2
3
4
TxD1 P67
RxD1 P66
CLK1 P65
CTS1 RTS1 P64
TxD0 P63
RxD0 P62
CLK0 P61
CTS0 RTS0 P60
CLKout RDY P57
ALE P56
HOLD P55
HLDA P54
BCLK P53
RD P52
BHE WRH P51
WR WRL P50
CS3 P47
CS2 P46
CS1 P45
CS0 P44
R720
27K
R355
10K
R353
2
27K
C354
47p
C361
1n5
U351A
LMC6032
R371
15K
C391
100n
C373
22n
RX CTCSS
C57
10n
R62
10R
Q54
BC807W
0R
R63
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q361
1
R372
12K
4K7
R804
D85
BAV70W
Q703
PDTC114TU
Q56
PDTC144EU
100n C371
C372
4n7
6
5
R375
82K
C56
10n
R57
1R
11
R715
330K
U701A
LMC6034
R718
100K
R727
180K
C727
470n
U502D
HEF4066
R730
47K
C730
470n
TX Audio In
TX Selcall
S9
VSEn
S7
VSData
S8
VSClk
+5V
Q53
BC807W
R374
47K
U502B
HEF4066
3
Q363
PDTC144EU
10
R816
10K
0R
+5V
Pgm_CnVss
Pgm_Rst
Pgm_TxD
Pgm_RxD
Pgm_Sclk
Pgm_Busy
Pgm_P55
Pgm_P50
Q52
PDTC144EU
Q51
PDTC144EU
R712
150K
10n
C709
VSTIn
S4
R714
3K3
Q55
PDTC144EU
U701D
LMC6034
VSTOut
C401
47n
R403
15K
C818
22n
C732
not_fitt.
+5V
C421
R417
1K
100R
R421
Vout
U52
L7808CD2
Vin
C403
C54
10n
9
1
R710
4K7
47n
C707
C708
10n
C55
10u/16V
R711
2K2
Audio IC Disable
R83
1K
Q85
PDTC144EU
C706
47n
13.6V Switched
3
U802
M51943A
Vout
C74
10u/16V
D82
BAV70W
D802
BAV99W
U701C
LMC6034
R705
2K2
Vin
C802
4u7/10V
1
R709
470R
R733
not_fitt.
+FILT
R729
2K2
R74
560R
R73
560R
R408
12K
Q72
BC847BW
R72
100R
6
U502C
HEF4066
R71
100p 4K7
C72
R85
100R
R707
100K
R708
100K
R704
10K
C705
100n
C808
22n
Q82
BC817W
BAV70W
D81
+5V
R94
10K
Q802
BC857CW
R813
1K
R815
not_fitt.
Q92
BC857CW
+5V
R86
22K
R92
560R
+5V
1
+5V
U804
M5278L05
Vout
C810
10n
D803
BAV99W
TxD0
RxD0
Alarm Out
D71
BAV99W
R491
R77
220K
R76
3K3
not_fitt.
R490
RV71
10K
R78
10K
12K
R79
13.6V Unswitched
Q441
PDTC114TU
R443
5k6
J80
not_fitt.
3
C801
470u/16V
+5V
R91
220R
R700
100K
R828
220R
R829
220R
R801
22R
R800
22R
Q91
BC857CW
C820
1n
R827
47K
Gnd
Alarm Out
13.6V
Alarm In
Q81
BC807W
13.6V Switched
R81
10K
R402
470R
1K
R82
T36_LED
J803
J901
T36 RHead Conn.
+5V
BAV70W
D801
R810
220K
Q801
BC857CW
1
2
3
4
5
6
7
8
9
10
R806
RX Gain select
PCB: 580280-4
EMC
L51
1
2
3
4
5
6
7
8
CN901
41B0108
Cable Assembly
'Preset Vol'
CN902'
D50
1N5404
Version: 41523-12
Int.Spkr
SK2
Ext.Spkr
J401
13.8V DC
SK1
97T3600FPA
8
7
6
5
4
3
2
1
J902'
1
2
3
CN804
8
7
6
5
4
3
2
1
CN902
TX3600 Front Panel
Option: Local PMR TX3600
TX3800W TX3800N
------------------------XF201,2 45T15A
45T081BF
CF301 CFWM455E CFWM455F
L241
2.2uH
1.2uH
L242
not fit 1uH
L251
not fit 1uH
C234
3p3
4p7
C243
100p
8p2
C244
5p6
not fit
C246
1n
8p2
C247
1p
not fit
C251
not fit not fit
C253
1n
6p8
R234
680R
220R
R241
680R
3K3
R251
680R
1K5
R306
3K3
1K
R244
680R
1K5
R235
100R
0R
C233
3p3
1p
1
2
3
J804
8
7
6
5
4
3
2
1
J902
97T3600ICB
TX3600 Interconnect PCB
LD11
LED R/G
(Connector Rear View)
TX3600 RHead
J903
Option: Telemetry / Remote Head PMR TX3600
LS004 - TX3600 Flash Programmer Adaptor
Gnd
2
600024/26
9pin DSUB F
9
8
Gnd
2
1 Gnd
1 2 23 +5V
CnVss
3 4 4 Rst
5 6 56 TxD
RxD
7 8 7 SClk
9 10 89 Busy
P55
10 P50
J802 Socket Pinout
Top View
Beep Tones
R811
220K
2
Gnd
TX On
1
2
3
4
5
6
7
8
9
10
7
VP
2
1
RX Gain Select
R812
330K
Audio Unmute
12
TX Gain Select
1
6
2
7
3
8
4
9
5
8
SGND
2
SVRR
3
Mute
14
5
VCO Off
TX Mod.Audio
17
31672.dwg
PGND
5
15
Trig
16
R522
R536
not_fitt.
R508
330R
10K
C507
100p
TP501
VCO CV
fin
fin
C115
47p
+8V TX
L251
not_fitt.
XT301
44.545MHz
R251
680R
C254
not_fitt.
5
6
C253
1n
+8V RX
C514
0.22u/35V
R511
10R
R301
100R
C516
22n
+5V
R535
10K
C508
100p
R817
22K
R832
220K
R831
1M
D804
BAV99W
C251
not_fitt.
C244
5p6
XF202
45T15A
D241
BAV99W
C240
100n
R520
150R
R513
33R
C511
1n
C506
1n
C831
22n
C731
47p
L105
330nH
C114
10n
R523
100K
R530
1K
NTC10K
RT501
t
100
99
+5V
98
97
96
95
RX Audio
94
RX CTCSS
93
RSSI , RF Level
92
Noise Volts
91
Batt. Volts
90
Temperature
89
88
87
86
85
84
83
82
81
R818
4K7
C242
10n
C243
100p
R112
22R
R242
100R
L241
2.2uH
R243
100R
Q102
2SC4226
4p7
C111
C109
1n
C241
2p2
Q240
2SK360
R244
680R
R108
2K2
Q103
2SC4226
L102
22nH
R376
3K3
C811
22n
C247
1p
R107
0R
C234
3p3
C112
1n
C232
1n
R231
150R
C102
4p7
R232
270R
D212
1SV276
Q230
3SK241
L232
2.2uH
L231
22nH
BA591
D106
R117
1K5
C231
10p
100p
R154
0R
R120
10K
D101
1SV304
33R
R217
68K
R213
100K
C224
15p
R218
4K7
C228
22n
L603
EMC
C119
100p
C610
1n
C227
22n
R212
100K
C220
1p5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
R216
68K
R215
68K
26PIN
L605
13nH
C631
0.5p
C215
1p
C216
1p
Gnd
DO
LD
CLK
DI
Ao1
Ao2
R821
10R
C214
15p
C226
22n
R205
220R
L203
8nH
C212
1p5
C207
10n
9
Q201
BFG520
R202
22K
C206
100p
C613
3p3
R203
10K
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
5
9
4
8
3
7
2
6
1
C637
22n
R624
22K
R625
22K
R201
100K
L202
13nH
R208
10K
2
3
7
C225
22n
47p
C204
10p
C202
R214
68K
C203
8p2
L201
15nH
10p
C201
R626
1M
C624
5p6
C614A C614B
3p3 3p3
D608
BA591
C638
22n
1
C608
1n
33p
C623
L609
13nH
C614
2p2
L608
13nH
C619
not_fitted
U603A
LM358
R621
47R
RS232 DCE
Name
CD
RD
TD
DTR
GND
DSR
RTS
CTS
n.c.
C614C
3p3
L606
13nH
C615
2p2
DB25/M Function
Pin Name
1 GND
2 RS232 RX OUT
3 RS232 TX IN
4 RS232 RTS IN /AUX PTT
5 RS232 CTS OUT/AUX BUSY
6 TX AUDIO
7 RX AUDIO
8 13.6V SWITCHED
9 ALARM OUT
10 DO1
11 DO2
12 DO3
13 DO4
14 DO5
15 DO6
16 DO7
17 DO8
18 DI1
19 DI2
20 DI3
21 DI4
22 DI5/AI5
23 DI6/AI6
24 DI7/AI7
25 DI8/AI8
DB9/F
Pin
1
2
3
4
5
6
7
8
9
C613C
3p3
C633
0.5p
DB25
D25
DB9
D9
R618
10K
R206
10K
U603B
LM358
R620
10R
C613A C613B
3p3
3p3
D605
1PS76SB17
R631
10K
D201
BAV99W
R207
0R
D202
1SV276
6
5
C618
68p
R617
100K
DA5
DA4
DA3
DA2
R629
22K
16
15
14
13
12
11
L206
330nH
R204
100R
VSS
Vcc
Vdd
Ao6
Ao5
Ao4
Ao3
C821
22n
C617
12p
MA4P1250
D603
C612A C612
3p3
3p3
L607
13nH
R616
100K
D602
MA4P1250
6p8
D604
1PS76SB17
C634
C635
1n
C632
R632
10K
R633
10K
6p8
M62354GP
D210
1SV276
8
1
2
3
4
U805
+5V
Q603
BC817W
DA0 5
DA1 6
2K2
R619
16
17
18
19
20
21
22
23
24
25
26
TX3600 25 Way Cable Assy - LE003
C611A C611
3p3
3p3
R211
100K
L204
8nH
C217
1p
R101
220K
C621
10u/25V
C219
15p
C129
1n
+8V TX
C518
10n
R103
0R
D211
1SV276
L205
8nH
C222
2p2
4
L602
390nH
C606
1n
U602
RA30H4452M
RF out
C221
not_fitt.
C117
4.7u/10V
1K
R119
D105
1SV276
R121
10K
C609
1n
R219
47R
TP201
RF BPASS
C116
100p
1K
R118
C103
D104
100p
1SV276
L101
330nH
C101
10p
L100
330nH
D102
1SV276
C607
1n
R612
Telemetry
26J
P26
GND
RS232 RX OUT
RS232 TX IN
RS232 RTS IN / AUX PTT 26PIN
RS232 CTS OUT / AUX BUSY
TX AUDIO
TX3600 9 Way Cable Assy - LE004
RX AUDIO
13.6V SWITCHED
ALARM OUT
GND
DO1
P26A
DO2
1
DO3
2
DO4
3
DO5
4
DO6
5
DO7
6
DO8
7
DI1
8
DI2
9
DI3
10
DI4
11
DI5/AI5
12
DI6/AI6
13
DI7/AI7
14
DI8/AI8
15
BUSY
J801
33R
RA5
100Kx4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
PTT
TP4
RSSI
TP3
TP2
Note:
On TX3800 all models the
MAX202 option is always fitted.
R611
C118
0.5p
C622
1n
C605
1n
33R
R610
R381
2K2
R604
3K3
RF in
D103
1SV304
R116
5K6
C126
L151
0R
EMC
L604
3K9
R380
RA12
100Kx4
C844
100n
C843
100n
C615A
2p2
C625
68p
R615
10K
C616
68p
ANT
BNC
TX3800 Circuit Diagram (PCB Rev.4)
C233
3p3
R234
680R
C235
10n
R233
330R
R104
8K2
3p9
C104
8
13
7
14
6
2
Alarm Out
R2in
R1in
T2out
RA4
1Kx4
1
V-
V+
T1out
4u7/10V
C380
RA3
1Kx4
R105
3K3
R235
100R
C106
4p7
C105
10p
Q101
2SC4226
R115
22R
C108
100p
XF201
45T15A
R122
22R
R106
470R
330nH
R113
100R
5p6
C603
L601
22nH
C604
1n
C814
22n
R2out
R1out
T2in
T1in
C2-
C2+
C1-
C1+
+5V
U841
MAX202CS
not_fitt.
RA2
1Kx4
Q104
BC847BW
L103
9
12
10
11
5
4
3
RA11
PDTC114TU
Q602
TX Disable
R111
22R
L242
not_fitt.
R241
680R
Out
4
U601
UPC2710TB
R603
47R
C813
22n
RA1
1Kx4
C812
22n
C110
1n
L106
330nH
C246
1n
C245
10n
47p
R109
5K6
C107
R110
3K3
In
C842
100n
C841
100n
13.6V Switched
C819
1n
R824
22K
C602
1n
R114
4K7
1
C113
2u2/10V
R602
68R
1n
C601
5K6
R378
D806
BAV99W
Q105
PDTC114TU
150R
R601
C375
1n
D805
BAV99W
C845
100n
1
16
VCC
GND
15
J802
FLASH PGM
MixOut
Vcc2
BW Select
BW select
18
Rset
Quad
10
14
Amp
Dec2
16
Busy
IFout
9
Mute
IFin
6
8
4
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
P70 TxD2 TA0out
P71 RxD2 TA0in
P72 CLK2 TA1out
P73 TA1in
P74 TA2out
P75 TA2in
P76 TA3out
P77 TA3in
P80 TA4out
P81 TA4in
P82 INT0
P83 INT1
P84 INT2
P85 NMI
Vcc
Xin
Vss
Xout
RESET
P86 XCout
P87 XCin
CNVss
BYTE
P90 TB0in
P91 TB1in
P92 TB2in
P93 DA0
P94 DA1
P95 ANEX0
P96 ANEX1
4
DAC_LD
A19 P43
A18 P42
A17 P41
A16 P40
A15 P37
A14 P36
A13 P35
A12 P34
A11 P33
A10 P32
A9 P31
Vcc
A8 P30
Vss
A7 P27
A6 P26
A5 P25
A4 P24
A3 P23
A2 P22
A1 P21
A0 P20
D15 P17
D14 P16
D13 P15
D12 P14
D11 P13
D10 P12
D9 P11
D8 P10
8
14
Fo/LD
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
7
Vcc1
FLout
1
7
Vp
2
15
Dec1
CPout
3
n.c.
OscB
13
AmpIn
OscE
2
6
Vcc
Gnd
Gnd
Gnd
2
3
5
PLL_EN
SDATA
SCLK
3
4
9
10
CE
R507
330R
13
12
11
LE
Data
Clock
Service Manual
CpGnd
AGnd
GND
RX On
1
VCO Output
Vgg
2
0
GND
Vcc
TX CTCSS
3
<8
TX3800
VCO Off
4
R814
10K
Circuit Diagrams
Page 31
1
2
3
4
5
6
7
8
8
7
6
5
4
3
2
1
CN902'
1
2
3
CN804
8
7
6
5
4
3
2
1
CN902
2
1
EMC
D50
1N5404
L51
PCB: 580280-2
3
2
1
CN803
T36_LED
C414
470u/16V
R414
22K
RV402
10K
'Preset Vol'
D51
C53
SMBJ16 220u/35V
C52
33n
3
2
1
J803
PWR On
JMP1
41B0108
Cable Assembly
1
2
3
4
5
6
7
8
CN901'
41B0129
Cable Assembly
1
2
3
4
5
6
7
8
13.6V Switched
R415
10R
C413
100n
C415
100n
C412
47u/16V
C417
100n
R828
220R
R829
220R
RV71
10K
R78
10K
R75
3K3
R413
100R
R412
2K7
2
4
AmpOut
Boot
C410
470u/16V
*see table
not_fitt.
R491
C407
33n
C409
22n
R411
10K
100p
C72
R71
4K7
PreampIn
U401
TDA1015
C406
33n
C405
4n7
7
8
R493
15K
R492
150K
R443
22K
R73
560R
R409
10K
R408
10K
R444
22K
1
R406
2K2
Vin
22K
R419
R404
22K
100n
C402
18n
C401
100n
R403 R418
C422 22K 1M
1n
C356
4u7/10V
S4
R714
3K3
R53
1K
R54
1K
13
R359
2K2
10
R373
68K
Q363
PDTC144EU
R731
1M
Q703
PDTC114TU
R58
1K
R372
12K
1
R354
470K
C354
47p
Q362
PDTC114TU
C351
100n
8
7
6
5
R728
820R
15p
C815
R803
10K
Q803
PDTC114TU
R501
33K
C308
22n
R312
not_fitt.
R313
not_fitt.
R351
2K2
Q351
PDTC114TU
R358
1K5
R350
1K19
11
12
R533
2K2
C502
150p
R802
10R
C806
22p
XT801
16MHz
C803
100n
+5V
C805
22p
Gnd
AF
RSSI
R303 R302
10K 1K
TR301
455kHz
10p
C307
R524
1K
R514
5K6
R307
22K
R518
not_fitt.
C517
22n
C509
100p
C311
1n
R331
5K6
C331
1n
Vcc
R251
680R
C253
1n
C254
not_fitt.
C831
22n
C243
100p
R112
22R
C113
2u2/10V
RA1
1Kx4
R108
2K2
R376
3K3
In
Out
L103
330nH
C246
1n
L242
not_fitt.
XF201
45T15A
L106
330nH
5p6
C603
EMC
L604
C233
3p3
R234
680R
C102
4p7
D101
1SV304
R120
10K
R604
3K3
RF in
BA591
D106
R217
68K
1 2
3 4
5
24
25 26
C119
100p
C610
1n
L603
EMC
C129
1n
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
C227
22n
R216 R215
68K
68K
L605
13nH
C631
0.5p
9
16
15
14
13
12
11
C214
15p
C226
22n
L203
8nH
C212
1p5
R207
0R
L202
13nH
R201
100K
R208
10K
D201
BAV99W
C637
22n
R624
22K
3
2
7
C204
C225
22n
47p
L608
13nH
C619
not_fitted
10p
C202
R214
68K
C203
8p2
L201
15nH
10p
C201
R626
1M
D608
BA591
C638
22n
1
C608
1n
33p
C623
L609
13nH
U603A
LM358
R621
47R
R618
10K
R206
10K
U603B
LM358
R620
10R
RS232 DCE
Name
CD
RD
TD
DTR
GND
DSR
RTS
CTS
n.c.
C624
5p6
3p3
C615 C615A
C614C
2p2 2p2
L606
13nH
DB25/M Function
Pin Name
1 GND
2 RS232 RX OUT
3 RS232 TX IN
4 RS232 RTS IN /AUX PTT
5 RS232 CTS OUT/AUX BUSY
6 TX AUDIO
7 RX AUDIO
8 13.6V SWITCHED
9 ALARM OUT
10 DO1
11 DO2
12 DO3
13 DO4
14 DO5
15 DO6
16 DO7
17 DO8
18 DI1
19 DI2
20 DI3
21 DI4
22 DI5/AI5
23 DI6/AI6
24 DI7/AI7
25 DI8/AI8
DB9/F
Pin
1
2
3
4
5
6
7
8
9
C613C C614 C614AC614B
3p3
2p2 3p3 3p3
C633
0.5p
DB25
D25
DB9
D9
C613A C613B
3p3
3p3
R625
22K
D202
1SV276
Q201
R203
BFG520 10K
R202
22K
6
5
C618
68pF
R617
100K
C613
3p3
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
5
9
4
8
3
7
2
6
1
D605
1PS76SB17
D602
MA4P1250
DA5
DA4
DA3
DA2
R629
22K
C207 R205 L206
10n 220R 330nH
C206
100p
R204
100R
VSS
Vcc
Vdd
Ao6
Ao5
Ao4
Ao3
M62354GP
Gnd
DO
LD
CLK
DI
Ao1
Ao2
D210
1SV276
C215
1p
C216
1p
8
1
2
3
4
C821
22n
C617
12p
D603
MA4P1250
L607
13nH
C612A C612
3p3
3p3
R616
100K
D604
1PS76SB17
6p8
R631
10K
C634
C635
1n
6p8
R632
10K
R633
10K
C632
R821
10R
U805
+5V
Q603
BC817W
DA0 5
DA1 6
2K2
18
19
20
21
22
23
24
25
26
TX3600 25 Way Cable Assy - LE003
26PIN
C611
3p3
R619
C611A
3p3
R211
100K
L204
8nH
C217
1p
R101
220K
C621
10u/25V
C219
15p
L205
8nH
D211
1SV276 R212
100K
C220
1p5
C221
not_fitt.
C117
4.7u/10V
R119 +8V TX
1K
C518
10n
L100
330nH R103
0R
C103
100p
4
U602
RA30H4452M
RF out
L602
390nH
C606
1n
J801 Socket Pinout
Top View
R121
10K
C228
22n
P26
GND
RS232 RX OUT
RS232 TX IN
RS232 RTS IN / AUX PTT 26PIN
RS232 CTS OUT / AUX BUSY
TX AUDIO
TX3600 9 Way Cable Assy - LE004
RX AUDIO
13.6V SWITCHED
ALARM OUT
GND
P26
DO1
DO2
1
DO3
2
DO4
3
DO5
4
DO6
5
DO7
6
DO8
7
DI1
8
DI2
9
DI3
10
DI4
11
DI5/AI5
12
DI6/AI6
13
DI7/AI7
14
DI8/AI8
15
16
Telemetry
17
D105
1SV276
C222
2p2
R213
100K
C224
15p
R218
4K7
BUSY
J801
R612
33R
C609
1n
R219
47R
TP201
RF BPASS
C116
100p
R118
1K
D104
1SV276
C101
10p
L101
330nH
D102
1SV276
C118
0.5p
C622
1n
R611
33R
C607
1n
RA5
100Kx4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
PTT
TP4
RSSI
TP3
TP2
Note:
On TX3800 all models the
MAX202 option is always fitted.
C625
68pF
R615
10K
C616
68pF
ANT
BNC
TX3800 Circuit Diagram (PCB Rev.2)
D212
1SV276
C232 R232
270R
1n
L232
2.2uH
Q230
3SK241
L231
22nH
R117
1K5
C231
10p
R154
0R
C844
100n
C843
100n
R610
33R
C605
1n
R381
2K2
RA12
100Kx4
D103
1SV304
100p
C126
R116
5K6
R233
330R R231
150R
C235
10n
R235
100R
C234
3p3
RA4
1Kx4
1
8
13
7
14
6
2
Alarm Out
R2in
R1in
T2out
T1out
V-
V+
R380
3K9
4u7/10V
L151
3p9 0R
C104
R105
3K3
C106 R104
10p 8K2
C105
4p7
Q101
2SC4226
+5V
C380
RA3
1Kx4
R107 C112
0R
1n
Q104
BC847BW
Q602
PDTC114TU
TX Disable
47p R106
470R
C241 R241 C247
680R 1p0
2p2
Q240
2SK360
4
C604
1n
L601
22nH
U601
UPC2710
R603
47R
R109
R122
5K6
C107 22R
C245
10n
RA2
1Kx4
R2out
R1out
T2in
T1in
C2-
C2+
C1-
C1+
U841
MAX202CS
not_fitt.
RA11
9
12
10
11
5
4
3
1
C811 C812 C813 C814
22n 22n 22n 22n
C602
1n
R114
4K7
C842
100n
C841
100n
13.6V Switched
C819
1n
R824
22K
C845
100n
R113
L102
100R
22nH
C110
Q103
1n
R110
2SC4226 3K3
C108
R111 100p
22R
R115
22R
L241 R244
2.2uH 680R
R243
100R
Q102
2SC4226
4p7
C111
C109
1n
Q105
PDTC114TU
VCO Off
1n
R602
68R
1
C601
R378
5K6
D806
BAV99W
R601
150R
C375
1n
D805
BAV99W
C244 C242 R242
5p6 10n 100R
XF202
45T15A
D241
BAV99W
C240
100n
C114
10n
L105
330nH
C731
47p
NTC10K
R513
33R
TP501
VCO CV
t
RT501
L251 C251
C301
22p XT301 not_fitt. not_fitt.
C302 44.545MHz
68p
5
20
R301
100R
+8V TX
+8V RX
C513
4u7/10V
C252
10n
D301
BAS316
R300
22K
RFin
R305
1K
R309
330R
+8V
R510
390R
R520
150R
C511
1n
R516
1K5
R523
100K
U501
UMA1021M
C506
1n
C507
100p
+5V
R535
10K C516
22n
C508
100p
C115
47p
C512
100n
R832
220K
R831
1M
D804
BAV99W
100
99
+5V
98
97
96
95
RX Audio
94
RX CTCSS
93
RSSI , RF Level
92
Noise Volts
91
Batt. Volts
90
Temperature
89
88
87
86
85
84
83
82
81
R818 R817
4K7 22K
R508
330R
C514
0.22u/25V
R511
10R
R509
4K7
L302
470nH
C316
C305 U301
4u7/10V 100n TK10487
C304 C303
100n 100n
CF301
CFWM455E
R304
560K
C312
2p2
C313
100n
R517
100K
C515
22n
R306
3K3
R726
100K
Noise Volts
R519
10R
R521
10R
R506
330R
C725
100n
C504
100n
R526
10K
R525
2K7
Q502
BC847BW
U801
M16C62
P97 ADtrig
AVcc
Vref
P100 AN0
AVss
P101 AN1
P102 AN2
P103 AN3
P104 AN4 KL0
P105 AN5 KL1
P106 AN6 KL2
P107 AN7 KL3
P00 D0
P01 D1
P02 D2
P03 D3
P04 D4
P05 D5
P06 D6
P07 D7
link: Rev4 PCB
TX Selcall
TX CTCSS
C804
100n
DAC_LD
SCLK
SDATA
PLL_EN
R515
12K
R522
10R C519
100n
D302
BAV99W
C320 C321
100n 100n
R308
47K
RV531
10K
'Bal'
DA4
R503
3K3
C533
1u/50V
C503
100p
C317
22n
R532
10K
1SV231
100p
C532
C120
15n
Q702
PDTC114TU
R502
C510
22K
Q501 1n
BC847BW
C500
100n
+8V TX
+8V
'Mod'
RV701
10K
R725
1K
D501
C531
100p
C319 R311 C310
1n
3K3 22n
100K
R505
10R
XT1
12.8MHz
R531
10K
C534
C352
100n
C350
1n
+5V
R534
100K
R314
C362
8n2
R723
22K
C729
22n
Q704
PDTC114TU
VsSupply
S6
S5
+8V
Gnd
1n
VCC
NC
ORG
GND
Beep Tones
Audio Unmute
93C86
CS
CLK
DI
DO
U803
C712
U701B
1n
LMC6034
RV301
4K7
'Mute'
C353
1n5
R352
33K
4u7/10V
C355
C711
3n3
R722
10K
C714
8n2
R732
1M
RLED Drive
GLED Drive
Alarm Input
Alarm Latch
Alarm Drive
Mic Mute
Audio On
TX On
RX On
R721
22K
R356
10K
R809
1K
1
2
3
4
TxD1 P67
RxD1 P66
CLK1 P65
CTS1 RTS1 P64
TxD0 P63
RxD0 P62
CLK0 P61
CTS0 RTS0 P60
CLKout RDY P57
ALE P56
HOLD P55
HLDA P54
BCLK P53
RD P52
BHE WRH P51
WR WRL P50
CS3 P47
CS2 P46
CS1 P45
CS0 P44
R720
27K
R355
10K
R353
2
27K
3
C361
1n5
U351A
LMC6032
R371
15K
C391
100n
C373
22n
Q361
PDTC114TU
S2
VSROut
R357
100R
10K
R391
4
C57
10n
R62
10R
RX CTCSS
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
+5V
Q54
BC807W
R63
0R
C58
10n
U502E
HEF4066
C710
100p
R59
1K
100n C371
6
5
R375
82K
4K7
4K7
4K7
4K7
C809
100n
R804
R805
R807
R808
D85
BAV70W
Q56
C56 PDTC144EU
10n
11
R715
330K
U502D
HEF4066
C372
4n7
S1
VSRIn
U502A
HEF4066
3
U502B
HEF4066
7
R718
100K
R727
180K
C727
470n
TX Audio In
TX Selcall
C715
10n
U701A
LMC6034 R717
10K
R57
1R
U351B
LMC6032
R374
47K
+5V
S9
VSEn
S7
VSData
S8
VSClk
Q53
BC807W
Q51
PDTC144EU
R712
150K
10n
C709
R816
10K
+5V
R806
0R
Pgm_CnVss
Pgm_Rst
Pgm_TxD
Pgm_RxD
Pgm_Sclk
Pgm_Busy
Pgm_P55
Pgm_P50
Q52
PDTC144EU
R730
47K
C730
470n
Q55
PDTC144EU
U701D
LMC6034
C421
3
S3
C818
22n
VSTOut VSTIn
+5V
R417
1K
R421
100R
Vout
R401
1K
C403
5n6
C54
10n
R710
4K7
47n
C707
C708
10n
C55
10u/16V
U52
L7808CD2
Q442
BC847BW
R405
22K
R407
27K
C404
5n6
D401
BAV70W
R442
15K
R711
2K2
R83
1K
Q85
PDTC144EU
C74
10u/16V
13.6V Switched
U701C
LMC6034
R705
2K2
3
U802
M51943A
Vout
C706
47n
D802
BAV99W
C807
22n
R709
470R
R85
100R
C73
0.47u/25V
C59
47p
R74
560R
C411
1u/50V
C408
2n2
R410
4K7
+FILT
Q71
2SJ349
PreampOut
Q441
BC857CW
6
R729
2K2
U502C
HEF4066
Q72
BC847BW
C75
10u/16V
R707
100K
Q82
BC817W
C705 R708
100n 100K
C808
22n
D82
BAV70W
BAV70W
D81
+5V
R94
10K
Vin
C802
4u7/10V
1
Q92
BC857CW
+5V
R86
22K
R92
560R
+5V
Alarm Out
R93
10K
1
R813
1K
R815
not_fitt.
Q801
BC857CW
+5V
U804
M5278L05
Vout
D803
BAV99W
TxD0
RxD0
D71
R72
BAV99W 100R
R700
100K
0R
Vin
C810
10n
C703 C704
100n 100n
R704
10K
R416
not_fitt.
R76
3K3
R77
220K
13.6V Unswitched
C702
1n
R703
100R
Mic In
1
2
3
4
3
C801
470u/16V
+5V
R91
220R
J80
Alarm SIL
Gnd
Alarm Out
13.6V
Alarm In
12K
R79
R801
10R
Q91
BC857CW
C820
1n
R827
47K
R81 Q81
10K BC807W
R490
C416
100n
R402
470R
R82
1K
J901
T36 RHead Conn.
+5V
BAV70W
D801
R811
220K
1
2
3
4
5
6
7
8
9
10
J802
FLASH PGM
RX Gain select
Version: 41523-10
1
2
3
4
5
6
7
8
CN901
41B0108
Cable Assembly
On PMR radios:
R491=0R, R490=not fitted
R75=1K, R77=not fitted
All other models:
R490=0R, R491=not fitted
R77=1K, R75=not fitted
Int.Spkr
SK2
Ext.Spkr
J401
13.8V DC
SK1
TX3600 Front Panel
8
7
6
5
4
3
2
1
J902'
97T3600FPA
Option: Local PMR TX3600
TX3800W TX3800N
------------------------XF201,2 45T15A
45T081BF
CF301 CFWM455E CFWM455F
L241
2.2uH
1.2uH
L242
not fit 1uH
L251
not fit 1uH
C234
3p3
4p7
C243
100p
8p2
C244
5p6
not fit
C246
1n
8p2
C247
1p
not fit
C251
not fit not fit
C253
1n
6p8
R234
680R
220R
R241
680R
3K3
R251
680R
1K5
R306
3K3
1K
R244
680R
1K5
R235
100R
0R
C233
3p3
1p
1
2
3
J804
8
7
6
5
4
3
2
1
J902
97T3600ICB
TX3600 Interconnect PCB
LD11
LED R/G
(Connector Rear View)
TX3600 RHead
J903
Option: Telemetry / Remote Head PMR TX3600
LS004 - TX3600 Flash Programmer Adaptor
R810
220K
Gnd
2
41B0127
10pin Plug
Gnd
2
600024/26
9pin DSUB F
9
Q802
BC857CW
Beep Tones
1
2
3
4
5
6
7
8
9
10
2
Gnd
TX On
1
6
2
7
3
8
4
9
5
5
Control
3
Vcc
Gnd
1
AmpIn
6
2
1
12
PLL Lock
1 Gnd
+5V
1 2 2
3 CnVss
3 4 4 Rst
TxD
5 6 5
6 RxD
7 8 7 SClk
Busy
9 10 8
9 P55
10 P50
J802 Socket Pinout
Top View
Audio Unmute
8
Gnd
9
5
14
7
RX Gain Select
R814
10K
8
TX Gain Select
R812
330K
10
TX Mod.Audio
17
BW Select
BW select
18
Rset
Quad
16
Busy
IFout
9
Mute
IFin
6
15
Trig
16
VCC
GND
15
31672.dwg
MixOut
4
14
8
4
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Amp
Dec2
13
R507
330R
P70 TxD2 TA0out
P71 RxD2 TA0in
P72 CLK2 TA1out
P73 TA1in
P74 TA2out
P75 TA2in
P76 TA3out
P77 TA3in
P80 TA4out
P81 TA4in
P82 INT0
P83 INT1
P84 INT2
P85 NMI
Vcc
Xin
Vss
Xout
RESET
P86 XCout
P87 XCin
CNVss
BYTE
P90 TB0in
P91 TB1in
P92 TB2in
P93 DA0
P94 DA1
P95 ANEX0
P96 ANEX1
3
n.c.
6
Vcc
Gnd
Gnd
Gnd
2
3
5
A19 P43
A18 P42
A17 P41
A16 P40
A15 P37
A14 P36
A13 P35
A12 P34
A11 P33
A10 P32
A9 P31
Vcc
A8 P30
Vss
A7 P27
A6 P26
A5 P25
A4 P24
A3 P23
A2 P22
A1 P21
A0 P20
D15 P17
D14 P16
D13 P15
D12 P14
D11 P13
D10 P12
D9 P11
D8 P10
Dec1
7
AmpIn
OscE
2
VCO Output
Vgg
2
0
GND
Vcc
3
51
52
53
54
55
56
TX Disable 57
58
59
60
61
62
63
64
65
VCO Off
66
67
68
69
PLL Fast
70
71
72
73
74
75
76
77
78
79
80
20
19
18
17
16
15
14
13
12
11
LOCK
ISET
VCC
CP-GND
XTALA
XTALB
VDD1
~E
DATA
CLK
FAST
CPF
CP
VDD2
VSS3
RFI
VSS2
POL
PON
VSS1
1
2
3
4
5
6
7
8
9
10
Service Manual
OscB
RX On
1
8
TX CTCSS
4
TX3800
<-
Page 32
1
1
1
1
RS232 RX
RS232 TX
PTT
Call
Mic
Gnd
C208
100n
6
5
4
3
2
1
PCB: 580238
CALL
PTT
CH_A
CH_B
QUIET
PRIORITY
+5V
+13V SW
TXD1
DGND
RXD1
10K
R201
C201
100n
R206
2K2
2
2
2
R204
27K
+5V
R211
1k
R214
10K
2
SW104
SW103
SW102
SW101
R205
1K
C204
4u7/25V
+5V
Version: 31639-5
RJ11MIC
J201
PCB: 580237
Version: 31639-5
SQ
DUP
OS/GS
SCAN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
FRONT PANEL CONN
J101
TP10
+5V
68K
R202
100R
1Kx4
RA102
Vin
22n
Q201
BC847CW
10R
R200
4u7/10V
3
2
C206
1
C2
4u7/10V
C10
22n
C7
22n
22n
C14
NC7SZ08
GND Y
B
A VCC
U201
C6
22n
C13
+5V
22n
C12
1
22n
C11
C9
22n
100k
R6
100k
R5
1Kx4
RA101
1
+5V
FLASH PROG
C5
22n
Vout
D202
BAV-99W
R203
2K2
R212
330R
D201
BAV-99W
C202
10n
R210
R3
10k
3
R4 R12 R13
10k 10k 470R
C1
10nF
+5V
1R0
R1
GND
2
Vin
+5V
4 R213
100R
5
C205
100n
3
J202 REMOTE CONN
C8
22n
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
+5V
Vout
U103
M51943A
GND
2
U102
M78L05
C207
22n
PTT
Call
RESET
VPP
BUSY
SCLK
TXD2
RXD2
CE
C3
27p
C4 R2
27p 1K
XT101
4.000MHz Ceramic
15
10
9
60
59
58
57
56
55
54
53
6
5
4
3
2
1
64
63
23
22
21
20
19
18
17
16
8
7
12
13
+5V
P60/CNTR1
P61/XCIN
P62/XCOUT
P50/INT0
P51/INT1
P52/T3OUT/PWM0
P53/T4OUT/PWM1
P54/RXD1
P55/TXD1
P56/SCLK1
P57/SRDY1
P40/Oout0/AN0
P41/Oout1/AN1
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/RTP0/AN6
P47/RTP1/AN7
P30/SRDY2
P31/SCLK2
P32/TXD2
P33/RXD2
P34/INT2
P35/TXOUT
P36/T2OUT
P37/CNTR0
RESET
CNVSS
XIN
XOUT
+5V
U101
M38C29FFFP
AVSS
VREF
VL3
COM0
COM1
COM2
COM3
P20/SEG16
P21/SEG17
P22/SEG18
P23/SEG19
P24/SEG20
P25/SEG21
P26/SEG22/VL1
P27/SEG23/VL2
P10/SEG8
P11/SEG9
P12/SEG10
P13/SEG11
P14/SEG12
P15/SEG13
P16/SEG14
P17/SEG15
P00/SEG0
P01/SEG1
P02/SEG2
P03/SEG3
P04/SEG4
P05/SEG5
P06/SEG6
P07/SEG7
C15
100n
COM1
COM2
COM3
COM4
28
27
26
25
24
R207
10R
61
62
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
52
51
50
49
48
47
46
45
6
1
3
5
4
SW105
34_CHSW
5
4
3
2
1
7
18
21
16
15
17
8
9
13
14
4
5
6
7
24
20
19
23
22
COM4
1
2
3
4
5
6
7
8
J203
Priority
On/Off
Quiet
M16C RS232 RX 1
M16C RS232 TX 2
3
Mic+20dB
4
Gnd
5
Vol Set
6
RX Aud
7
+13V SW
8
+13V
SW106
10klog
+5V
SEG16
SEG13
SEG18
SEG17
SEG19
SEG3
SEG4
SEG8
SEG9
COM4
SEG0
SEG1
SEG2
SEG10
SEG14
SEG15
SEG11
SEG12
SEG20 25
SEG21 26
14
VCC
VSS
11
+13V SW
8Bit_RX
DGnd
8Bit_TX
+13V SW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Priority
Quiet
Ch UP
Ch DN
Service Manual
2
COM3
COM2
COM1
3
2
1
COM3
COM2
COM1
27
28
12
11
10
SEG22
SEG23
SEG7
SEG6
SEG5
LCD101
TX3400LCD
1
R8
1k
R9
1k
Q101
BC847CW
D102
2LEDS
R10
1k
TX3800 Front Panel
Circuit Diagram
10k
R11
D101
2LEDS
R7
1k
+13V SW
1
TX3800
Page 33
1
3
4
CALL
2
VOL_UP
D3
C13
10n
1
1
1
1
1
1
1
2
2
1
R25
1K
R15
10K
R206
2K2
R205
1K
+5V
R28
2K2
10K
R14
SW111
PWR
8K2
R16
PCB: 580368-2
Version: 42804-1
4u7/10V
C204
47u/35V
C14
BAS316
SW108
SW103
SW102
SW112
SW107
SW101
SW104
SW109
SW110
SW106
1
47u/35V
47u/35V
T3
C18
n.f.
BC847CW
EL1
MICROPHONE
T2
BC847CW
R24
10K
TP12
+13V UNSWCT
T1
BC858CW
SQL
VOL_UP
CH_UP
QUIET
SCAN
CH_DOWN
VOL_DWN
PTT
CALL
MENU
PRI
C24
+13V_UNSWITCHED
2
2
CH_UP
SQL
2
2
SCAN
QUIET
2
2
CH_DOWN
VOL_DWN
PTT
2
MENU
1
3
4
2
PRI
SW105
1
2
D
1K
R31
100n
C201
C208
100n
R26
15K
NDS8434A
G
S
Q1
1K
R30
1R
R1
Vout
4K7
R201
R204
27K
+5V
15K
22K
R202
Vout
R2
10K
R32
3K3
R33
6K8
D1
BAS316
3
C22
10n
VBATT
+13VSWa
C21
47n
10R
R200
Q201
BC847CW
R203
1K
4u7/10V
C206
POWER_ON/OFF_drive
POWER_ON/OFF_sense
R27
10K
+5V
C202
10n
R210
100R
Vin
U103
M51943A
J803
FLASH BOOT
C2
4u7/10V
1
+13VSWa
1
+5V
+13VSWb
R29
D2
BAS316
R6
1R
+13V SW
TP10
+13V SWCHT
1K
R5
1K
RA2
1K
+5V
Vin
U102
M5278L05
RA1
C1
10n
3
+13VSWb
GND
2
GND
2
C23
1
Service Manual
2
R37
1K
R3
10K
SCLK
RESET
C3
27p
R36
1K
VBATT
GREEN
LED
RED
C4
27p
XT101
8MHz
15
10
9
60
59
58
57
56
55
54
53
6
5
4
3
2
1
64
63
23
22
21
20
19
18
17
16
8
7
12
13
C17
VIN 1
VOUT 1
GND
DATA
R4
8K2
4u7/10V
4u7/10V
1
2
3
4
+5V
n.c.
Vcc
R18
1M
VIN 2
VOUT 2
VCC
CLOCK
P10/SEG8
P11/SEG9
P12/SEG10
P13/SEG11
P14/SEG12
P15/SEG13
P16/SEG14
P17/SEG15
P00/SEG0
P01/SEG1
P02/SEG2
P03/SEG3
P04/SEG4
P05/SEG5
P06/SEG6
P07/SEG7
C15
100n
1K5
4
5
+5V
+5V
TP11
C19
100n
61
62
+5V
18
21
16
15
17
8
9
13
14
4
5
6
7
24
20
19
23
22
GREEN
SEG10
SEG7
SEG12
SEG13
SEG11
SEG20
SEG19
SEG15
SEG14
COM1
SEG23
SEG22
SEG21
SEG4
SEG8
SEG9
SEG5
SEG6
COM4
LC101
MC520LCD
RS232 RX
RS232 TX
Mic+20dB
Gnd
Audio OUT
Audio IN
+13V SW
+13V_UNSWITCHED
COM1
COM2
COM3
COM4
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
36
35
34
33
32
31
30
29
28
27
26
25
24
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
44
43
42
41
40
39
38
37
52
51
50
49
48
47
46
45
TP9
C20
100n
U101
M38C29FFFP
AVSS
VREF
VL3
COM0
COM1
COM2
COM3
P20/SEG16
P21/SEG17
P22/SEG18
P23/SEG19
P24/SEG20
P25/SEG21
P26/SEG22/VL1
P27/SEG23/VL2
R20
8
7
6
5
24LC00T/OT
SCL
GND
SDA
U104
U105 M61545AFP
DATA
CLOCK
1
2
3
P60/CNTR1
P61/XCIN
P62/XCOUT
P50/INT0
P51/INT1
P52/T3OUT/PWM0
P53/T4OUT/PWM1
P54/RXD1
P55/TXD1
P56/SCLK1
P57/SRDY1
P40/Oout0/AN0
P41/Oout1/AN1
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/RTP0/AN6
P47/RTP1/AN7
P30/SRDY2
P31/SCLK2
P32/TXD2
P33/RXD2
P34/INT2
P35/TXOUT
P36/T2OUT
P37/CNTR0
RESET
CNVSS
XIN
XOUT
Q4
PDTC114TU
R34
1K
C16
C6
15p
1
2
3
4
5
6
7
8
RED
Base
1
2
3
4
5
6
7
8
R841
4K7
R840
10K
LED
R834
4K7
R833
10K
LED
RLD802
RLD803
G
G
R851
390R
Q834
R853
680R
LED
LED
R842
1K
R845
n.c.
Q832
BC847CW
R837
330R
R846
n.c.
+13VSWa
R835
4K7
BC847CW
R836
1K2
BC847CW
Q831
BC847CW
Q833
R852
390R
RLD801
G
LED
RLD800
G
LED
+13VSWa
1
2
3
R854
820R
Backlight
SK802
R856
4K7
R858
3K9
R857
15K
LED
RED
MC522BC Circuit Diagram
R849
4K7
GREEN
J203
R847
3K9
R848
15K
LED
25
26
SEG3
SEG2
14
VCC
VSS
11
COM2
COM3
COM4
3
2
1
COM3
COM2
COM1
27
28
12
11
10
SEG1
SEG0
SEG16
SEG17
SEG18
TX3800
Page 34
Service Manual
R11
8.2k
R9
nf
R
G
LD1
KPTB-1615-GR
R12
33k
PCB: 580358-1
Version: 42768-1
G
+5V
Call
PTT
GND
Mic Audio
Mic Rx
Mic Tx
J1
Base
PBT5
2
4
6
1
2
3
4
5
6
R
Mic
Mic Rx
Mic Tx
PTT
G
R5
10k
LD2
KPTB-1615-GR
R14
33k
J2
STK500
R13
8.2k
1
3
5
PBT6
PBT7
N_RST
TX3800
Page 35
R15
8.2k
R
C5
100p
G
EL1
LD3
KPTB-1615-GR
R16
33k
SW1
PTT
R6
10k
R17
8.2k
R
C3
27p
G
R19
8.2k
R
R25
0R
C4
27p
XT1
4.9152MHz
+5V
C2
100n
LD4
KPTB-1615-GR
R18
33k
DQ1
BC847BS
C1
10u/16V
G
LD5
KPTB-1615-GR
R20
33k
R21
4k7
R
+5V
LD6
KPTB-1615-GR
R22
33k
R4
0R
R1
100R
R2
47
R3
47k
+5V
PDT0
10
9
8
7
6
5
4
3
2
1
GND
PD5
PD4
PD3
PD2
U1
SW3
SW5
SW2A
SW6
R24
0R
SW4
ATTINY2313
PD6
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
VCC
SW1A
PA0/XTAL2
PA1/XTAL1
PD1/TXD
PD0/RXD
PA2/N_RST
N_RST
D2
BAV99W
PBT5
17
11
+5V
SW9
SW8
SW7
PDT6
PBT1
PBT0
12
PBT2
13
PBT3
15
14
PBT4
PBT6
18
16
PBT7
20
19
SWFN
SWUP
SWBK
SWDN
C6
100n
SWHOOK
R10
nf
MC540BC Circuit Diagram
SW#
SW0
SW*
SW2
CALL
R7
2k2
+5V
A Division of:
Head Office: SYDNEY - Locked Bag 2086, North Ryde, N.S.W. 1670, Australia. Tel: +61 (0)2 9844 6666 Fax: +61 (0)2 9844 6600
MELBOURNE
ADELAIDE
PERTH
BRISBANE
SYDNEY
AUCKLAND
7 Micro Circuit
14 Philips St.
Unit 1
Unit 1
Unit B
Unit 2
Dandenong South
Thebarton
10-12 Harvard Way
89-101 Factory Road
22-24 College St.
24 Bishop Dunn Pl.
Vic. 3165
S.A. 5031
Canning Vale
Oxley
Gladesville
East Tamaki
Tel: (03) 9798 0988
Tel: (08) 8234 2633
W.A. 6155
Qld. 4075
N.S.W. 2111
Manukau N.Z. 2013
Fax: (03) 9798 0177
Fax: (08) 8234 5138
Tel: (08) 9455 5744
Tel: (07) 3278 6444
Tel: (02) 9879 8888
Tel: (09) 274 0955
Fax: (08) 9455 3110
Fax: (07) 3278 6555
Fax: (02) 9816 4722 Fax: (09) 274 0959
For customers outside Australia and New Zealand please contact your local GME Distributor or email: export@gme.net.au
Part Number: 310445
Drawing Number: 44424-1
www.gme.net.au