Service Manual
Model: X23SW (2-WAY STEREO PLUS SUBWOOFER)
ACTIVE CROSSOVER
www.altoproaudio.com
Version: 1.1
CONTENTS
1. Specification
2. Block Diagram
3. Schematic Diagram
4. Printed Circuit Board
5. Wiring Diagram
6. Test Procedure
7. Electrical Parts List
8. Exploded Views & Mechanical Parts List
9. Notes
1. SPECIFICATION (X23SW)
Electrical
Subwoofer Frequency Range
50Hz ~ 250Hz
Low - High Frequency Range
250Hz ~ 6KHz
THD
<0.05%
S/N Ratio
>95dB
Controls
Input Level
Continuouliy variable
Output Level
Sub, Low. High continuously variable
Low Cut
Front panel switches
Phase
Front panel switches
Power Supply
Connector type
3-pole IEC , grounded
Type
Servo controlled, stabilized
Mains supply
95-120V /210-240V ,60-50Hz
Power Rating
6W
Physical
Dimensions
483(W) 194.5(D) 44(H)mm (19" 7.7" 1.7")
Weight
2.95 Kg(6.50lb)
A
B
C
D
1
1
CN-BAL-FEMALE-2
2
3
1
B-CHANNEL SIGNAL
CN-BAL-FEMALE-2
2
3
1
A -CHANNEL SIGNAL
2
3
2
3
AC PLUG
gain
VR
TL074
A
gain
VR
TL074
A
50Hz
AC INPUT 210V-240V
1
1
FUSE
TL074
A
VR
gain
1
2
2
3
TL074
A
VR
gain
high pass freq.
900Hz - +9KHz
1
LOW-HIGH pass
2
3
high pass freq.
900Hz - +9KHz
102℃
high out
20V
0V
20V
gain
VR
TL074
2
3
gain
VR
TL074
3
lowerAfilter pass
SUB-LOW
pass filter
over freq.
100Hz +1KHz
2
3
1
1
AND FILTER CIRCUIT
BRIDGE
3
lowerAfilter pass
SUB-LOW
pass filter
over freq.
100Hz +1KHz
PT-SCX-34
high out
0V
115V
230V
5 6
AC POWER SW
LOW-HIGH pass
100mA
2
TL074
A
pass filter
TL074
A
Date:
File:
A4
Size
Title
VR
gain
1
VR
gain
1
SUB - LOW
SUB - LOW
Revision
4
2-Nov-2002
Sheet of
D:\pc42\pc42\ALTO\服務手冊\X23SW\X23SW
Drawn
BLOCK
By: DIGRAME .DDB
Number
pass filter
LOW OUT
2
3
LOW OUT
2
3
-15v
0v
+15V
4
A
B
C
D
2.Block Diagram
A
B
C
X1
X2
INPUT
2
3
1
1a
2b
4d
3c
5e
C2
10uF
R1
100K
1
C1
10uF
U1A
TL074
+15V
U2A
TL074
R20
10K
1
R21
10K
-15V
1
2
3
3
2
R7
3K74
VR1B
100KB
R8
620K
U1E
TL074
R19
10K
VR1A
100KB
R6
620K
U2E
TL074
1
R5
3K74
CN3
3P2.5
CH1(CH2)
R3
100K
R2
100K
3
2
R4
100K
C3
103(M)
4
11
D
4
11
1
5
6
U1B
TL074
2
U2B
TL074
R22
10K
C5
103(M) R9
10K
C4
103(M)
5
6
2
VR3
100KB
7
7
VR2
100KB
R24
6K8
C10
330P
R25
10K
R11
6K8
9
10
C6
330P
R12
10K
9
U2C
TL074
C11
47P
R26
22K
10
U1C
TL074
C7
47P
R13
22K
8
SW2
INV
8
3
C19
683(M)
3
R28
10K
R27
10K
C20
683(M)
R14
47K
U2D
TL074
R30
10K
U1D
TL074
14
C8
10uF
14
C12
10uF
R17
100K
R16
100K
R31
100K
X23SW
X23(M).Sch
27-Jan-2002
Model No:
4
5e
3c
4d
2b
1a
5e
3c
4d
2b
1a
of 1
TASY J.S.
V1.0
X5
HI OUT
X4
LOW OUT
Revision
R18
220R
Sheet 1
Drawn By:
R32
220R
SW1
30HZ CUT
ALTO Mobile : X23SW MAIN BOARD
R29
10K
A4
Date:
File:
Size
Titel
12
13
R15
100K
12
13
C9
10uF
4
A
B
C
D
3. Schematic Diagram
A
B
C
D
CH1
R63
10K0
CH2
R64
10K0
3
2
1
1
U9A
TL074
VR6A
100KB
1
R66
19K1
R68
19K1
R67
330K
VR6B
100KB
R69
330K
C23
473(M)
C25
473(M)
C24
473(M)
5
6
2
U9B
TL074
2
7
VR7
100KB
R71
6K8
R72
10K
AGND
1
2
3
-15V
3
3
C29
683M)
1
2
3
C28
683M)
U9E
TL074
+15V
U9C
TL074
8
J102
3P2.5
10
9
R74
47K
J101
3P2.5
C26
330P
C27
47P
R73
22K
4
11
R75
100K
12
13
U9D
TL074
C31
10uF
R79
100K
R78
100K
SW4
SW-6-SK22H13
R80
220R
4
X23SW
X23(SUB).Sch
27-Jan-2002
Model No:
4
Sheet 1
Drawn By:
ALTO Mobile : X23SW SUB WOOFER BOARD
A4
Date:
File:
Size
Titel
14
C30
10uF
1
2
3
4
5
6
V1.0
of 1
TASY J.S.
Revision
5e
X5
SUB WOOFER OUT
3c
4d
2b
1a
A
B
C
D
A
B
C
D
1
1
CON3
3
2
1
CN?
DB1
RB154
2
2
C19
1000/35V
C18
1000/35V
C4
104P
C5
104P
IC2
L7915
C7
1000/16V
C6
1000/16V
IC1
L7815
3
3
C9
104P
C8
104P
-15V
+15V
Date:
File:
A4
Size
Title
R1
1.2K
-15V
CN5
2P2.5
CN3
3P2.5
CN2
3P2.5
Revision
4
27-Jan-2002
Sheet of
D:\pc42\pc42\pc42\S-OVER\SCX202S\SCX202S\SCX202S.ddb
Drawn By:
Number
SCX系系 POWER Schematic
1
2
1
2
3
1
2
3
+15V
4
A
B
C
D
4.Printed Circuit Diagram
X23SW(M) PCB LAYOUT
PCB : X23SW(M) Top Overlay
PCB : X23SW(M) Bottom Layer
PCB : X23SW(M) Bottom Solder Mask
PCB : X23SW(M) Bottom Overlay
PCB : X23SW(M) Drill Drawing Plots
Hole Size
31mil
(0.8mm)
39mil
(1.0mm)
47mil
(1.2mm)
63mil
(1.6mm)
87mil
(2.2mm)
138mil
(3.5mm)
Totals
Hole Count
128
21
17
1
6
4
177
CX22OUT PCB LAYOUT
PCB : CX22OUT Bottom Layer
PCB : CX22OUT Bottom Solder Mask
PCB : CX22OUT Top Overlay
PCB : CX22OUT Drill Drawing Plots
Hole Size
39mil
(1.0mm)
55mil
(1.4mm)
87mil
(2.2mm)
110mil (2.8mm)
Totals
Hole Count
7
3
20
1
31
XPWR PCB LAYOUT
PCB : XPWR Bottom Layer
PCB : XPWR Bottom Solder Mask
PCB : XPWR Bottom Overlay
PCB : XPWR Top Overlay
Hole Size
31mil
(0.8mm)
39mil
(1.0mm)
63mil
(1.6mm)
98mil
(2.5mm)
138mil
(3.5mm)
Totals
PCB : XPWR Drill Drawing Plots
Hole Count
14
22
3
4
4
90
X23SW(SUB) PCB LAYOUT
PCB : X23SW(SUB) Bottom Layer
PCB : X23SW(SUB) Bottom Solder Mask
PCB : X23SW(SUB) Bottom Overlay
PCB : X23SW(SUB) Top Overlay
Hole Size
31mil
(0.8mm)
39mil
(1.0mm)
47mil
(1.2mm)
87mil
(2.2mm)
138mil
(3.5mm)
Totals
PCB : X23SW(SUB) Drill Drawing Plots
Hole Count
68
18
10
4
4
104
A
B
C
D
1
1
CN2
CH1(CH2)
CX22OUT
CN3
CN1
3
X23SW(M)
2
CN2
CN1
CH1
X23SW(SUB)
CN3 CH2
CN2
CN2
CH1(CH2)
CX22OUT
CN1
3
CN4
GND
A4
Date:
File:
Size
紅
藍
220V 110V
X23SW
2-Nov-2002
X23SW(全).Sch
Model No:
4
4
Sheet 1
Drawn By:
電源開關
LED
PT-SCX34
GND
AC IN
ALTO Mobile : X23SW Wiring Diagram
X23SW(M)
Titel
CN3
XPWR
CN3 CN2 CN1
X23SW Wiring Diagram
2
V2.0
of 1
TASY J.S.
Revision
A
B
C
D
5. Wiring Diagram
7. Electrical Parts List
Page 1 of 1
2002/11/1
X23SW-ALTO-230V
Structure Needing Material Detail List
建檔日: 2002/02/08
NO.
Midprod NO
修正日: 2002/10/28
Quanity
Unit
1 A-X23SW-ALTO-230V
1.000
PCS
2 A-X23SW 底后板組合
1.000
PCS
3 P-X23SW(SUB)
1.000
PCS
4 P-X23SW(M)
2.000
PCS
5 P-CX22OUT(R)
1.000
PCS
6 P-CX22OUT(L)
1.000
PCS
7 P-XPWR
1.000
PCS
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
specify: AMP
Mid No: A-X23SW-ALTO-230V
NO
Material No
1 MFR2271ZZ
MARK:
2 MBK256ZZ
MARK:
3 MTP229ZZ
MARK:
4 HD00021
MARK:
5 TP3055
MARK:
6 HCSA16
MARK:
7 NPL272
MARK:
8 NPL285
MARK:
9 NPL287
MARK:
10 ME00060
MARK:
11 MF00061
MARK:
12 HLSF160
MARK:
13 HLSF129
MARK:
14 HLSF134
MARK:
15 HLSC146
MARK:
16 HLSC76
MARK:
17 NMBA02
MARK:
18 NMBP64
MARK:
19 MSCB13
MARK:
20 MSCB28
MARK:
21 MSCB38
MARK:
22 MSCB34
MARK:
23 MSCB35
MARK:
24 MSCB58
MARK:
25 MSTC04
MARK:
Page 1 of 3
standard quantity:
1.000
X23SW
Quanity Unit
1.000 PCS
rear board (spray black-paint)
X23SW
1.000 PCS
top cover-printing
CLE2.0
1.000 PCS
fuse(T)
100mA 250V φ5*20mm CSA/S/UL/VDE
1.000 PCS
loop transformer
PT-SCX34
1.000 PCS
AC outlett
(S)315-B (AC select)
1.000 PCS
cover
φ8.5*4 blue 072C
8.000 PCS
switch cap
φ6*2.5 YELLOW C
1.000 PCS
φ3*W6*18.3 black ABS
5.000 PCS
MIC stand nut
JY-6351G-02-250
7.000 PCS
mic stand washer
JY-6351G-02-250
7.000 PCS
Item Name
panel(white)
Specific
row-wire connecting wiring
2P 230mm
1.000 PCS
row-wire connector wiring3P-3P 200m/m
1.000 PCS
row-wire connector wiring3P-3P 120m/m
2.000 PCS
signle terminal wiring CF:W146
green/yellow 80m/m
1.000 PCS
single terminal wiring CF:W76
green/yellow 150m/m
1.000 PCS
power push button
1.000 PCS
plastic knob
φ15*17
double φ11*17.5
COOL GRAY 8C
Ps
8.000 PCS
black-plated screw
cross-head pan head 3*6
10.000 PCS
上蓋,后板
black plated screw
flat self 3*4
14.000 PCS
black plated screw
3*7
4.000 PCS
面板
black plated screw
pill 3*6
2.000 PCS
電源開關
black plated screw
cross-head pan head 3*10
2.000 PCS
AC座
black plated screw
iron-board pill 3*10
4.000 PCS
平衡座用
colour nut
4m/m
1.000 PCS
地線
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
Mid No: A-X23SW-ALTO-230V
Page 2 of 3
specify: AMP
standard quantity:
1.000
Quanity Unit
NO
Material No
Item Name
Specific
26 MSTC03
colour nut
3m/m
2.000 PCS
MARK:
27 MFSS04
washer
φ4*φ7*1t
1.000 PCS
MARK:
28 MFSC09
washer
φ3*φ10*1t
2.000 PCS
MARK:
29 MFST01
washer
φ4*φ8*0.5t
2.000 PCS
MARK:
30 NMCR01
cable tie(black)
ALT-102SB
5.000 PCS
MARK:
31 NLXM39
self-paste foot pad(SF-004)
12.7*9.0*3.0t
4.000 PCS
MARK:
32 HLSP143
single wave wired
UL1007 AWG24 120mm black L5R5
1.000 PCS
MARK:
33 HLSP158
P.V.C single wave wired UL1007 AWG22 250mm black 1.000 PCS
MARK:
34 HLSP164
P.V.C wiring
UL1617 AWG22 250mm black
1.000 PCS
MARK:
35 HLSP71
P.V.C single wave wired UL1617 22AWG 80m/m brown
1.000 PCS
MARK:
36 HLSA31
power cord
Europe 3P LT-312+LT-501
1.000 PCS
MARK:
37 HSWA13
alimentation SW
SDDLB 1007U
1.000 PCS
MARK:
38 DL43RG
L.E.D
LG2043 green
1.000 PCS
MARK:
39 NMCT20WW0020
sleeving flame retardant 5φ*20m/m
8.000 PCS
MARK:
40 NMCT16WW0010
sleeving flame retardant 2.5φ*10m/m
2.000 PCS
MARK:
41 NWCP04
lockable bag
5*7
1.000 PCS
MARK:
42 NWCP01WW0300*0580 PE bag
30*58cm
1.000 PCS
MARK:
43 HEM083
desiccant
30g
1.000
MARK:
44 NMCQA-275
instruction
X23SW ALTO
1.000
MARK:
45 NB01720
box
ALTO 19"系列
1.000 PCS
MARK:
46 NMLB1588-05ZZ
label
X23SW ALTO
2.000
MARK:
47 POA182
paper outter case 4 hole ALTO 19"
0.250 PCS
MARK:
48 PKMS153
sponge barrier
ALTO 19"
1.000 PCS
MARK:
49 PKMS156
barrier
ALTO19"
1.000 PCS
MARK:
50 NMCQ-073
assurance book
ALTO
1.000
MARK:
Ps
變壓器
地線
變壓器
地線
電源SW
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
specify: AMP
Mid No: A-X23SW-ALTO-230V
NO
Material No
51 NMLM381ZZ
MARK:
52 NE05004
MARK:
53 NMLH31
MARK:
54 NA00154
MARK:
55 NI02085
MARK:
Page 3 of 3
standard quantity:
1.000
label
X23SW
Quanity Unit
4.000
label
ALTO
4.000
label
MADE IN P.R.C.
2.000
box
ALTO
2.000 PCS
power switch
φ22*9.69
1.000 PCS
Item Name
Specific
Ps
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
Mid No: A-X23SW 底后板組合
NO
Material No
1 MBT2171ZZ
MARK:
2 MSDE34ZZ
MARK:
3 MSDE35ZZ
MARK:
4 MAPR80ZZ
MARK:
5 MMC013
MARK:
6 ME00050
MARK:
7 MSC023
MARK:
8 MSC030
MARK:
Page 1 of 1
specify: AMP
standard quantity:
1.000
Item Name
bottom rear plate
X23SW
Quanity Unit
1.000 PCS
barrier (black)
X23
1.000 PCS
fixed board (black)
X23
1.000 PCS
L-shape fixed bracket
1.2*28*20*10(CLE2.0)
1.000 PCS
iron pillar
hexagon 6.35*M3*6
2.000 PCS
Specific
iron pillar
screw pillar
12.000 PCS
M4*10*0.7PH
1.000 PCS
M3*10*0.5PH
2.000 PCS
Ps
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
specify: AMP
Mid No: P-X23SW(SUB)
NO
Material No
1 NPC2081
MARK:
2 RFC122S
MARK:R 80
3 RFC268S
MARK:R 71
4 RFC310S
MARK:R 63 64 72
5 RFC322S
MARK:R 73
6 RFC347S
MARK:R 74
7 RFC410S
MARK:R 75 78 79
8 RFC433S
MARK:R 67 69
9 RPC2191S
MARK:R 66 68
10 CE610N
MARK:C 30 31
11 HCSI0203
MARK:CN 2 3
12 HCSV0202
MARK:CN 1
13 CL347G
MARK:C 23 24 25
14 CL368G
MARK:C 28 29
15 HSWA18
MARK:SW 4
16 SIC002
MARK:U 9
17 RC00157
MARK:VR 7
18 RVS104
MARK:VR 6
19 MMCJ06
MARK:J 1 2 4
20 MMCJ12
MARK:J 3
21 MI01259
MARK:
Page 1 of 1
standard quantity:
Item Name
1.000
Quanity Unit
1.000 PCS
PCB
Specific
X23SW(SUB)1*3
1/8W fixed resistor
220Ω S type
1.000 PCS
1/8W fixed resistor
6.8KΩ S type
1.000 PCS
1/8W fixed resistor
10KΩ S type
3.000 PCS
1/8W fixed resistor
22KΩ S type
1.000 PCS
1/8W fixed resistor
47KΩ S type
1.000 PCS
1/8W fixed resistor
100KΩ S type
3.000 PCS
1/8W fixed resistor
330KΩ S type
2.000 PCS
1/8W precision resistor 19.1KΩ S type
2.000 PCS
electrolytic capacitor
10/16V ψ4*7
2.000 PCS
row-wire header
3P 2.5mm 180°
2.000 PCS
row-wire header
2P 2.0mm 180°
1.000 PCS
mylar capacitor
0.047/50V
3.000 PCS
mylar capacitor
0.068/50V
2.000 PCS
power switch
PZ30 PBA-M-2PB1L
1.000 PCS
integrated circuit
TL074CN(S&T)
1.000 PCS
1.000 PCS
potentiometer (C100K)
RV142B-20-25A-C15
1.000 PCS
jumper wire
8m/m
3.000 PCS
jumper wire
12m/m
1.000 PCS
test-5 φ1.8*10
2.000 PCS
Ps
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
Mid No: P-X23SW(M)
Page 1 of 1
specify: AMP
standard quantity:
NO
Material No
Item Name
Specific
1 NPC2082
PCB
X23SW(M)1*2
MARK:
2 RFC122S
1/8W fixed resistor
220Ω S type
MARK:R 18 32
3 RFC268S
1/8W fixed resistor
6.8KΩ S type
MARK:R 11 24
4 RFC310S
1/8W fixed resistor
10KΩ S type
MARK:R 12 19 20 21 22 25 27 28 29 30 9
5 RFC322S
1/8W fixed resistor
22KΩ S type
MARK:R 13 26
6 RFC347S
1/8W fixed resistor
47KΩ S type
MARK:R 14
7 RFC410S
1/8W fixed resistor
100KΩ S type
MARK:R 1 15 16 17 2 3 31 4
8 RFC462S
1/8W fixed resistor
620KΩ S type
MARK:R 6 8
9 RPC1374S
1/8W precision resistor 3.74KΩ Stype
MARK:R 5 7
10 CE610N
electrolytic capacitor 10/16V ψ4*7
MARK:C 1 12 2 8 9
11 MMCJ04
jumper wire
6m/m
J5
MARK:
12 CM410IS
metal-film capacitor(MSC)0.1uF/63V 5% CASE01
MARK:C 101
13 MMCJ06
jumper wire
8m/m
MARK:J 1 2 3 4
14 HCSI0203
row-wire header
3P 2.5mm 180°
MARK:CN 3
15 HCSV0205
row-wire header
5P 2.0mm 180°
MARK:CN 2
16 CL310G
mylar capacitor
0.01/50V
MARK:C 3 4 5
17 CL368G
mylar capacitor
0.068/50V
MARK:C 19 20
18 HSWA18
power switch
PZ30 PBA-M-2PB1L
MARK:SW 1 2
19 SIC002
integrated circuit
TL074CN(S&T)
MARK:U 1 2
20 RC00157
MARK:VR 2 3
21 RVS104
potentiometer (C100K)
RV142B-20-25A-C15
MARK:VR 1
22 MI01259
test-5 φ1.8*10
MARK:
2.000
Quanity Unit
1.000 PCS
2.000 PCS
2.000 PCS
11.000 PCS
2.000 PCS
1.000 PCS
8.000 PCS
2.000 PCS
2.000 PCS
5.000 PCS
1.000 PCS
1.000 PCS
4.000 PCS
1.000 PCS
1.000 PCS
3.000 PCS
2.000 PCS
2.000 PCS
2.000 PCS
2.000 PCS
1.000 PCS
2.000 PCS
Ps
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
specify: AMP
Mid No: P-CX22OUT(R)
NO
Material No
1 NPC2040
MARK:
2 HCSM61
MARK:X 1
3 HC00125
MARK:X 2 4 5
4 HLSF333
MARK:CN 1
Page 1 of 1
standard quantity:
Item Name
Specific
1.000
Quanity Unit
1.000 PCS
PCB
CX22OUT
MIC jack for balance
JY-5042-030G female plug 180°
1.000 PCS
MIC jack
JY-6351G-02-250
row-wire connector wiring5P(male)-5P(parent) 180mm
3.000 PCS
1.000 PCS
Ps
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
specify: AMP
Mid No: P-CX22OUT(L)
NO
Material No
1 NPC2040
MARK:
2 HCSM61
MARK:X 1
3 HC00125
MARK:X 2 3 4 5
4 HLSF331
MARK:CN 2
5 HLSF333
MARK:CN 1
Page 1 of 1
standard quantity:
Item Name
Specific
1.000
Quanity Unit
1.000 PCS
PCB
CX22OUT
MIC jack for balance
JY-5042-030G female plug 180°
1.000 PCS
MIC jack
JY-6351G-02-250
4.000 PCS
row-wire connector wiring2P(male)-2P(parent) 180mm
1.000 PCS
row-wire connector wiring5P(male)-5P(parent) 180mm
1.000 PCS
Ps
X23SW-ALTO-230V
2002/11/1
Item No: X23SW
specify: AMP
Mid No: P-XPWR
NO
Material No
1 NPC0106
MARK:
2 RFC212S
MARK:R 1
3 CC410F
MARK:C 4 5 8 9
4 CE747E
MARK:C 6 7
5 CE822F
MARK:C 18 19
6 DB001A
MARK:DB 1
7 SIC717
MARK:IC 1
8 SIC719
MARK:IC 2
9 HCSI0203
MARK:CN 2 3
10 HCSI0202
MARK:CN 4
11 HCSR0203
MARK:CN 1
12 STR802-T2
MARK:
13 MHL013
MARK:
14 MFSS03
MARK:
15 MSCN16
MARK:
Page 1 of 1
standard quantity:
Item Name
1.000
Quanity Unit
1.000 PCS
PCB
Specific
XPWR(1*4)
1/8W fixed resistor
1.2KΩ S type
1.000 PCS
ceramic capacitor
0.1uF SL
4.000 PCS
electrolytic capacitor
470/25V
2.000 PCS
electrotytic capacitor
2200/35V φ16*31.5mm
2.000 PCS
bridge rectifier
RB154 1A/400V
1.000 PCS
integrated circuit
7815
1.000 PCS
integrated circuit
7915
1.000 PCS
row-wire header
3P 2.5mm 180°
2.000 PCS
row-wire header
2P 2.5mm 180°
1.000 PCS
row-wire header
3P 3.96mm 180°
1.000 PCS
silicone insulator
TO-220 square type
2.000
heat sink
MA103*25m/m*2PIN
2.000 PCS
washer
φ3*φ5*1t
2.000 PCS
Ni screw
pill 3*6 thin tooth P0.5
2.000 PCS
Ps
8. Exploded Views