Sony CDX-GT490U, Service Manual

Page: 15 / 40

CDX-GT49UM/GT490U/GT490US/GT494U
CDX-GT49UM/GT490U/GT490US/GT494U
15
15
4-1.
BLOCK DIAGRAM – MAIN Section –
SECTION 4
DIAGRAMS
20 22 11 12 28
8
17 18
3
25
7
19 27 13 24
4
AU_LCH AU_RCH TXD(MC_BUS) RXD(MC_BUS) WAKE_UP Z-MUTE CD_ON CDM_ON SYS_RST EJECT_OK VBUS_ON A_ATT BU_CHECK AUDIO_8.5V A_3.3V BU_3.3V DR_6V
R-CH R-CH
R-CH
R-CH
R-CH
AUDIO +8.5V BU_+3.3V SERVO+3.3V
R-CH
7
AUX_LCH
9
AUX_RCH
BU+3.3V
MC_RX
59 MC_TX
60 WAKE_UP
58 Z_MUTE
62 CD_ON
27 CDM_ON
28 RESET
54 SYSRST
26 VBUS_ON
BU +3.3V
70
CLK_IN
61 MD2
51 MD0
53 FLASH_EN1
78 VOUT
1
VIN
2
15
D701
4
FMIN1
3
FMIN2
3
TU_LCH
8
AUX_GND
ELECTRONIC VOLUME
IC302
J1
(ANTENNA)
PHASE LOCKED LOOP
(PLL)
IC001
L6
FM MIX
L2
CN701
CD
MECHANISM
UNIT
(MG-101Y)
(1/2)
I2C BUS CONTROLLED
POWER AMP/MULTIPLE
VOLTAGE REGULATOR
IC301
SYSTEM CONTROL
IC401 (1/2)
RESET
IC403
CN802
4
TU_RCH
5
CD_LCH
6
CD_RCH
R-CH (FRONT) R-CH (REAR)
BATT
R-CH
8 9
18
SCL
19
SDA
14
RSSI
37
VSM
16
XTAL1
15
XTAL2
LOUT
ROUT
J901 AUX
X1
4MHz
S401
RESET
5 3
OUT-FL+ OUT-FL–
9 7
OUT-RL+ OUT-RL–
27
R-CH
ANT-REM
35
VP
BATT
20
VP1
6
VP2
30
AUDIO+B
31 33
SERVO+3.3V
MECHA+6V
34
PANEL+B
34 32
OUT_FRCH
27
SA_CLK
28
SA_DA
29
SA_OUT
OUT_RRCH
R-CH
31
R/S_OUT_LCH
13
ZAPPIN1
16
ZAPPIN2
4
SCL
AUDIO +8.5V SERVO+3.3V MECHA+6V PANEL+B
2
SDA
16
BEEP
22
STB
25
DIAG
7
10 12 11 16
1 9 2 4 3 6
37 38
SCL
SDA
I2C_SCK
I2C_SIO
I2C_SCK
I2C_SIO
I2C_SCK I2C_SIO
I2C_SCK
I2C_SIO
23
I2C_SCK
72
SA_CLK
71
SA_OUT
38
SA_IN
22
I2C_SIO
31
ATT
47
EXATT_XEN
98
ZAPPIN
97
BEEP
68
AMP_STB
69
DIAG
83
BU_CHECK
12
IN-FL
FL+ FL– L R RL+ RL– FR+ FR– RR+ RR– ANT-REM BATT ACC
35
OUT_FLCH
11
IN-RL
33
OUT_RLCH
MUTE
Q102
MUTE DRIVE
Q303,304
29
ACC_IN
ACC DETECT
Q805
+3.3V REG
IC402
MUTE
Q103
29
AMP-REM
5
AMP-REM
1
AMRFIN
REAR/SUB
D306
D308
D309
FU601
37
BU+B
B.U+5V
FRONT
R-CH
L
J302
R
-1 -2 -3 -4
AUDIO
OUT
MUTE
Q104
BU+3.3V
BATT
5
4
BACK-UP CHECK
Q802,807,808,
D806,807
MECHA +6V
3.3V
6
UART_CLK
3
FLASH_W
7
CLK_IN
2
RESET Ucom-TX(CD-RX)
4 1 5
Ucom-RX(CD-TX)
CN401 FLASH
PROGRAMMING
BU +3.3V
B.U +5V
R-CH (REAR/SUB)
30
R/S_OUT_RCH
CD MUTE
Q305
FLASH
PROGRAMMING
BUFFER
Q401,402,701
‡
S
LJQDO
P
DWK
‡
R-CH
LV
om
LWWHG
GXH
W
o
VD
m
H
DV
L-CH.
: AM : CD : FM : AUX