Sony WX-GT77UI / WX-GT78UI / WX-GT78UIM Service Manual ▷ View online
WX-GT77UI/GT78UI/GT78UIM
13
3-11. OPTICAL PICK-UP SECTION
3-12. OPTICAL PICK-UP
optical pick-up section
Note: Be careful not to touch the lens and hologram
terminal when removing the optical pick-up section.
tapping screw
(P
1.4)
leaf spring (OPS)
rack
optical pick-up
lead screw assy
WX-GT77UI/GT78UI/GT78UIM
14
MEMO
WX-GT77UI/GT78UI/GT78UIM
WX-GT77UI/GT78UI/GT78UIM
15
15
20
22
22
11
12
28
12
28
8
17
18
18
3
25
7
19
27
13
24
27
13
24
4
AU_LCH
AU_RCH
AU_RCH
TXD(MC-BUS)
RXD(MC-BUS)
WAKE UP
Z_MUTE
CD_ON
CDM_ON
RXD(MC-BUS)
WAKE UP
Z_MUTE
CD_ON
CDM_ON
SYS_RST
EJECT_OK
VBUS ON
EJECT_OK
VBUS ON
AU ATT
BU CHECK
MECHA 8.5V
A+3.3V
BU_+3.3V
DR_+6V
BU CHECK
MECHA 8.5V
A+3.3V
BU_+3.3V
DR_+6V
R-CH
R-CH
R-CH
R-CH
R-CH
R-CH
AUDIO +8.5V
BU_+3.3V
SERVO+3.3V
R-CH
R-CH
7 AUX-L
9 AUX-R
9 AUX-R
MC RX
59
MC TX
60
WAKE UP
58
Z-MUTE
62
CD_ON
30
CDM_ON
31
EJECT OK
70
RESET
54
SYSRST
29
V-BUS ON
BU +3.3V
88
CLK
61
MD2
51
MD0
53
FLASH EN1
78
VOUT
1
VIN 2
15
D201
4 FMIN1
3 FMIN2
3 FMIN2
3 TU-L
8 AUX GND
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
PHASE LOCKED LOOP
(PLL)
IC001
L6
FM MIX
L2
CN201
CD
MECHANISM
UNIT
(MG-101Z)
(1/2)
I2C BUS CONTROLLED
POWER AMP/MULTIPLE
VOLTAGE REGULATOR
IC301
SYSTEM CONTROL
IC501 (1/2)
RESET
IC303
CN701
4 TU-R
5 CD-L
6 CD-R
6 CD-R
R-CH (FRONT)
R-CH (REAR)
R-CH (REAR)
BATT
R-CH
8
9
9
18
SCL
19
SDA
14
RSSI
37 VSM
16 XTAL1
15 XTAL2
LOUT
ROUT
JAC1
L
R
-1
-2
AUX
J901 (1/2)
X1
4MHz
BUS
AUDIO IN
S22
RESET
5
3
3
OUT-FL+
OUT-FL–
OUT-FL–
9
7
7
OUT-RL+
OUT-RL–
OUT-RL–
27
R-CH
ANT-REM
35
VP
BATT
20
VP1
6
VP2
30
AUDIO+B
31
33
33
SERVO+3.3V
MECHA+6V
34
PANEL+B
34
32
32
OUT-FR
27
SACLK
28
SADA
29
SAOUT
OUT-RR
R-CH
31
OUT-SL
13
ZAP BEEP
16
ZAP BEEP
4 I2C SCK
AUDIO +8.5V
SERVO+3.3V
MECHA+6V
PANEL+B
SERVO+3.3V
MECHA+6V
PANEL+B
2 I2C SIO
16 BEEP
22 STB
25 DIAG
22 STB
25 DIAG
7
10
12
11
16
1
9
9
2
4
3
6
37
38
38
I2C SCK
I2C SIO
I2C-SCK
I2C-SIO
I2C-SIO
I2C-SCK
I2C-SIO
I2C-SIO
I2C-SCK
I2C-SIO
I2C-SIO
I2C-SCK
I2C-SIO
I2C-SIO
23
I2C_SCK
72
SACLK
71
SAOUT
38
SAIN
22
I2C_SIO
27
ATT
75
CD MUTE
98
ZAPPING BEEP
97
BEEP
68
AMPSTB
69
DIAG
83
BU CHECK
12 IN-FL
FL+
FL–
FL–
L
R
RL+
RL–
RL–
FR+
FR–
RR+
RR–
FR–
RR+
RR–
ANT-REM
BATT
ACC
35
OUT-FL
11 IN-RL
33
OUT-RL
MUTE
Q905
MUTE DRIVE
Q906,907
13 RST
12 BUS IN
11 CLK IN
10 BU CHECK
12 BUS IN
11 CLK IN
10 BU CHECK
9 DATA IN
8 DATA OUT
8 DATA OUT
25
ACC IN
ACC DETECT
Q703
+3.3V REG
IC302
MUTE
Q903
29
AMP-REM
5
AMP-REM
14
ILL
63
ILL IN
ILL DETECT
Q702
13
TEL-ATT
26
TEL ATT
TEL-ATT DETECT
Q701
1 AMRFIN
REAR
BUS INTERFACE
IC601
D901
D202
D502
FU601
28
BUS ON
37
BU+B
B.U+5V
FRONT
R-CH
L
J901 (2/2)
R
-3
-4
-5
-6
AUDIO
OUT
MUTE
Q901
BU+3.3V
BATT
2 BUS-R
1 BUS-L
3
BATT
CLK
RST
DATA I/O
BUS ON
5
6
6
8
4
2
3
3
1
4
1
2
2
3
BATT
J601
(BUS CONTROL IN)
TH601
7
6
BATTERY CHECK
Q601,D606,607
MECHA +6V
3.3V
6
NCO
3
F WRITE
7
CLK
2
RESET
RX
4
1
5
TX
CN501
FLASH
PROGRAMMING
BU +3.3V
B.U +5V
20
UNI SCK
19
UNISO
18
UNISI
CD MUTE
Q201
SUB OUT
(MONO)
FLASH
PROGRAMMING
BUFFER
Q501-503
• Signal Path
• R-CH is omitted due to same as L-CH.
: AM or MW
: CD
: FM
: BUS AUDIO
: AUX
4-1. BLOCK DIAGRAM – MAIN Section –
SECTION 4
DIAGRAMS
WX-GT77UI/GT78UI/GT78UIM
WX-GT77UI/GT78UI/GT78UIM
16
16
X502
32.768kHz
14
13
39
49
50
48
50
48
40
SYSTEM CONTROL
IC501 (2/2)
LCD DRIVER,LED CONTROL
IC2
KEYIN1
CL
CE
CE
BLUE
GREEN/AMBER
DIMMER
BLINK
LCD_SO
LCD_SCK
LCD_CE
KEYIN0
46 KEYACK1
11 RE-IN0
RE0
RE1
RE1
12 RE-IN1
XOUT
XIN
X501
7.92MHz
92
93 OSCOUT
OSCIN
77
78
76
P5/S5 3
P4/S4 2
P2/S2 80
P3/S3 1
COM1
I
COM4
LCD1
LIQUID
CRYSTAL
DISPLAY
PANEL
4
|
15
•
19
|
47
•
49
|
64
•
69
65
|
68
S6
I
S17
•
S21
I
S49
•
S51
I
S66
•
S67
DI
PANEL+B
KEY MATRIX
S2–13,15–21,250
(VOLUME)
PUSH DIAL SELECT
S1
ROTARY
ENCODER
95 SIRCS
REMOTE
CONTROL
SIGNAL
RECEIVER
IC1
LCD
BACK LIGHT
LED DRIVE
Q40
LED
DRIVE
Q41
LED
DRIVE
Q42
D48-50
LCD
BACK LIGHT
D54,57,58,61,62,65,
66,69,70,73,74,77,
78,81,82,85,86,88,
78,81,82,85,86,88,
253,254,256,258
D52,55,56,59,60,63,
64,67,68,71,72,75,
76,79,80,83,84,87,
76,79,80,83,84,87,
251,252,255,257
VOL ILLUMINATION
LED DRIVE
Q43
3
USB POWER
CONTROL SWITCH
IC802
99
SYNC OUT
89
USB OVER
79
USB ON
BATT
80
DD ON
IN
VBUS
4 EN
5 OC
2
3 IN
6
OUT
D803
L802
DC/DC CONVERTER
CONTROL
IC803
CD
MECHANISM
UNIT
(MG-101Z)
(2/2)
USB D+
USB D–
USB D–
3 CLR
2 B
5
Q
DC/DC CONVERTER
IC801
6
DRV
1 RC
7
OUT
8
OUT
USB POWER
SWITCH
Q801
USB POWER
CONTROL
Q802
SWITCHING
REGULATOR
Q803
+5V REG
Q806
VOLTAGE
DETECT
Q804,805
5
4
3
4
3
VBUS
CN203
D+
D–
D–
2
(USB)
L801
F801
L206
D804
34 RC IN1
45 KEYACK0
41 RC IN0
J701
(REMOTE IN)
• Signal Path
: USB
D44-47
VOL
ILLUMINATION
4-2. BLOCK DIAGRAM – DISPLAY Section –
Ver. 1.1
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