Read Sony CDX-M20 Service Manual online
CDX-M20
CDX-M20
17
17
4-2. SCHEMATIC DIAGRAM - MAIN Section (1/3) -
• See page 22 for IC Block Diagrams.
B
E
3
12
F
11
D
A
7
2
10
G
C
6
4
14
H
13
1
9
8
5
IC B/D
IC B/D
2
MAIN
BOARD
(3/3)
1
MAIN BOARD (2/3)
13.8
14.1
13.8
0
4.5
3.3
4.8
4.9
4.5
4.9
3.2
2.7
0
6.9
0
0
0
4.9
3.3
7.2
3.3
7.2
14.4
7.2
7.2
4.5
4.2
4.2
4.2
4.2
4.2
0.8
0.8
14.4
0.8
3.3
0.8
3.3
13.9
8.4
0<3.3>
6
10.3
14.4
14.3
5
0.6
0
3
3.3
3.3
4.9
4.9
0
MAIN BOARD (1/3)
IC802
IC301
IC801
IC403
IC402
C315
0.22
C317
2SC4154TP-1EF
Q301
1A4-A2
D305
10V
C307
220
25V
22
C303
16V
C312
10
47k
R322
47k
R324
4.7k
R323
0.22
C308
CN301
16P
1
FL+
2
RL+
3
RR+
4
FR+
5
AMP-REM
6
ANT-REM
7
ACC
8
GND
9
FL-
10
RL-
11
RR-
12
FR-
16
+B
13
TEL-ATT
14
ILL
15
TEST
17
+B
18
+B
19
+B
150
R305
1
C306
10V
1000
C409
10V
100
C411
DRA5114E0L
Q408
22
R422
100k
R401
0
FB403
DRC5114E0L
Q407
R812
220k
R813
220k
J801
(REMOTE IN)
1k
R802
47k
R584
4.7k
R306
10V
100
C408
220
R303
220
R304
R301
100
100
R302
1A4-A2
D31
1
1A4-A2
D312
16V
C330
47
R805
100k
R806
12k
R807
12k
R809
1k
R808
1k
R811
0
R801
1k
DRC5114E0L
Q801
DRC5144E0L
Q802
2SC4154TP-1EF
Q803
25V
47
C444
R815
100k
R803
39k
R804
68k
C807
100p
C808
100p
R810
2.2k
47p
C331
IC801
TC7WT126FU (TE12R)
1
2
3
4 GND
5
6
7
8
VCC
16V
47
C313
L302
140uH
MM1836A33NRE
IC402
CONT
GND
NP
VOUT
VIN
DA2J10100L
D401
R576
0
0
R814
74L
VC1G17GW
-125
IC802
1
NC
2
3
GND
4
5
VCC
16V
3300
C337
R819
22
IC301
TDF8556AJ/N5
1
TA
B
2
I2C_SIO
3
OUT
-FL-
4
I2C_SCK
5
OUT
-FL+
6
VP2
7
OUT
-RL-
8
P-GND1
9
OUT
-RL+
10
SVR
11
IN-RL
12
IN-FL
13
S-GND
14
IN-FR
15
IN-RR
16
BEEP
17
OUT
-RR+
18
P-GND3
19
OUT
-RR-
20
VP1
21
OUT
-FR+
22
STB
23
OUT
-FR-
24
P-GND4
25
DIAG
26
RST
27
ANT
-REM
28
CRES
29
AMP-REM
30
AUDIO+B(8.5V)
31
SER
VO-3.3V
32
GND
33
MECHA-6V
34
PA
N
EL
+B
35
VP
36
CBU
37
BU+B
1
C305
1
C339
1
C318
C314
1
0.47
C321
0.47
C323
0.47
C325
0.47
C327
C338
0.1
1
C333
C319
1
0.1
C407
0.1
C401
1
C402
C805
0.1
36V
F002
2A
FB802
0
FB803
0
2.2
R817
100
R816
100
R818
100
FB801
0
JW380
0.5A
F001
36V
1000p
C335
C803
1000p
C804
1000p
PST8228UL
IC403
VOUT
Vdd
NC
VSS
RKZ7.5B2KGP1
D801
RKZ18B2KGP1
D802
RKZ18B2KGP1
D805
RKZ18B2KGP1
D808
CN702
(SIRIUSXM IN)
10
9
8
7
6
5
4
3
2
1
1
2
3
4
5
3
4
5
6
7
8
9
9
BUS4
BUS5
13
14
15
16
17
18
19
20
STB
DIAG
BEEP
XM_PWREN
XM_RX
I2C_SDA
I2C_SCL
ACC
RESET
BU_IN
XM_TX
XM_RCH
XM_AGND
XM_LCH
RCIN0
AT
T
RCIN1
1
2
3
4
5
1
2
3
4
10
13
8
BATT
9
1
12
4
14
16
6
3
FRONT LCH (+)
2
15
7
5
REM OUT MAX 0.4A
FRONT LCH (–)
FRONT RCH (+)
FRONT RCH (–)
FRONT RCH (–)
REAR LCH (+)
REAR LCH (–)
REAR LCH (–)
REAR RCH (+)
REAR RCH (–)
REAR RCH (–)
11
GND
ACC
POWER AMP, REGULATOR
FU301
10A
32V
LOW VOLTAGE
CHECK
CHECK
OVER VOLTAGE
ACC CHECK
RESET SIGNAL
GENERATOR
+3.3V REGULATOR
MUTE DRIVE
MUTE DRIVE
BATTERY CHECK
BUFFER
BUFFER
C806
0.1
TO
CN301
(Page 18)
(Page 19)
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