Read Sony CDX-GT20 Service Manual online
15
15
CDX-GT20
CDX-GT20
1 ANT
4 TU-LCH
INPUT SELECT,
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
TU1
(TUNER UNIT)
CNP301
CD
MECHANISM
UNIT
(MG-101TA)
POWER AMP/MULTIPLE
VOLTAGE REGULATOR
IC750
SYSTEM CONTROL
IC501 (1/2)
RESET
IC602
CN601
3 TU-RCH
6 CD-LCH
5 CD-RCH
R-CH (FRONT)
R-CH (REAR)
VOLATT
R-CH (REAR)
VOLATT
BATT
B-CH
4
3
13
TU-SCL
14
TU-SDA
6
S-METER
7
TU-MUTE
16
E2P-SCL
17
E2P-SDA
39 VSM
10 VCC (8.3V)
11 TU-VDD (TU5V)
15 E2P-VDD
15 E2P-VDD
AUDIO 8.3V
TU+5V
B.U+3.3V
12 TU ATT
25 EEP_CKO
24 EEP_SIO
24 EEP_SIO
L-CH
R-CH
5
3
3
OUT-FL+
OUT-FL–
9
7
7
OUT-RL+
OUT-RL–
27
R-CH
ANT-REM
35
VP
BATT
30
AUDIO8.3V
31
33
33
SERVO3.3V
MECHA6V
34
PANEL+B
TU+5V
14
12
12
OUT-FR
OUT-RR
16
MUTE
4 SCL
AUDIO 8.3V
SERVO3.3V
MECHA6V
MECHA6V
PANEL+B
2 SDA
16 BEEP
22 STB
25 DIAG
25 DIAG
AUDIO 8.3V
15
7
10
12
11
16
1
9
2
4
3
6
17
18
18
SCL
SDA
I2C-SCL
I2C-SDA
I2C-SDA
I2C-SCL
I2C-SDA
I2C-SCL
I2C-SDA
I2C-SCL
I2C-SDA
I2C-SDA
VSM
TUATT
EEP-SCL
EEP-SDA
33
I2C_CKO
34
I2C_SIO
9
VOL ATT
86
ATT
5
BEEP
26
AMPSTB
8
DIAG
54
BU IN
73
TEST IN
12 IN-FL
FL+
FL–
RL+
RL–
FR+
FR–
RR+
RR–
ANT-REM
ACC
TEST
13
OUT-FL
11 IN-RL
11
OUT-RL
MUTE
Q441
MUTE DRIVE
Q478,479
BATT
72
ACC_IN
BATTERY LEVEL CHECK
Q580-582
ACC DETECT
Q631
TU+5V REG
Q1,D1
MUTE
Q461
D479
D511
D580
D581
FU601
37
B.UP+B
BU 3.3V
B.U+3.3V
8
MUTE-CONDITION
5
QUALITY
RDS
53 TU_ATT IN
38
13
QUALITY
NS MASK
DAVN
RDS ON
30
56
NS MASK
CONTROL
Q22
RDS RECEIVER
IC51
11
12
9
10
16
1
7
XTI
SCL
I2C-SCL
B.U+3.3V
I2C-SDA
SDA
INTN
XTO
MPX
VDDA
VDDD
+B SWITCH
Q51
9
15
X51
8.664MHz
11
15
15
22
24
24
26
16
5
7
6
21
27
9
25
18
19
19
8
1,2
AU_LCH
AU_RCH
UNI_SO
UNI_SI
UNI_CLK
Z_MUTE
Z_MUTE
CD_ON
CDM_ON
SYS_RST
EJECT_OK
BUS_ON
A_ATT
BU_IN
D_3.3V
A_3.3V
A_3.3V
BU_3.3V
DR_6V
R-CH
R-CH
R-CH
R-CH
SERVO 3.3V
B.U+3.3V
MECHA 6V
MECHA 6V
UNISO
59
UNISI
58
UNISCK
60
Z-MUTE
93
CD_ON
98
CDM_ON
99
RESET
77
SYSRST
88
BUSON
BU 3.3V
87
VOUT
1
VDD 2
D512
D510
• Signal Path
• R-CH is omitted due to same as L-CH.
: CD PLAY
: TUNER
5-1. BLOCK DIAGRAM — MAIN SECTION —
SECTION 5
DIAGRAMS
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