Sony CDX-GT373A Service Manual ▷ View online
CDX-GT373A
CDX-GT373A
17
17
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – MAIN Section –
11
15
15
22
24
26
16
24
26
16
5
7
7
6
21
27
27
9
25
18
19
18
19
8
1,2
AU_LCH
AU_RCH
AU_RCH
UNI_SO
UNI_SI
UNI_CLK
Z_MUTE
CD_ON
CDM_ON
UNI_SI
UNI_CLK
Z_MUTE
CD_ON
CDM_ON
SYS_RST
EJECT_OK
BUS_ON
EJECT_OK
BUS_ON
BU+3.3V
A_ATT
BU_CHECK
D_+3.3V
A_+3.3V
BU_+3.3V
DR_+6V
BU_CHECK
D_+3.3V
A_+3.3V
BU_+3.3V
DR_+6V
R-CH
R-CH
R-CH
R-CH
R-CH
SERVO +3.3V
BU_+3.3V
MECHA +6V
MECHA +6V
R-CH
9 AUX-LCH
7 AUX-RCH
7 AUX-RCH
UNISO
59
UNISI
58
UNISCK
60
Z-MUTE
61
CD_ON
91
CDM_ON
92
RESET
77
SYSRST
88
BUSON
BU +3.3V
96
VOUT
1
VDD 2
D609
D353
1 ANT
4 TU-LCH
8 AUX GND
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
TU1
(TUNER UNIT)
CN350
CD
MECHANISM
UNIT
(MG-101TC)
I2C BUS CONTROLLED
POWER AMP/MULTIPLE
VOLTAGE REGULATOR
IC300
SYSTEM CONTROL
IC501 (1/2)
RESET
IC602
CN300
3 TU-RCH
6 CD-LCH
5 CD-RCH
5 CD-RCH
R-CH (FRONT)
R-CH (REAR)
VOLATT
R-CH (REAR)
VOLATT
BATT
R-CH
4
3
3
13
TU-SCL
14
TU-SDA
6
S-METER
5
QUALITY
7
TU-MUTE
16
E2P-SCL
17
E2P-SDA
39 VSM
38 QUALITY
10 VCC (+8.3V)
11 TU-VDD (TU+5V)
15 E2P-VDD
11 TU-VDD (TU+5V)
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
J901
AUX
S103
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
TU+5V
26
24
24
OUT-FR
OUT-RR
R-CH
R-CH
21
22
22
SUBOUT L
SUBOUT R
28
MUTE
4 SCL
AUDIO +8.3V
SERVO+3.3V
MECHA+6V
PANEL+B
SERVO+3.3V
MECHA+6V
PANEL+B
2 SDA
16 BEEP
22 STB
25 DIAG
22 STB
25 DIAG
AUDIO +8.3V
7
10
12
11
16
1
9
9
2
4
3
6
29
30
30
SCL
SDA
I2C-SCL
I2C-SDA
I2C-SDA
I2C-SCL
I2C-SDA
I2C-SDA
I2C-SCL
I2C-SDA
I2C-SDA
I2C-SCL
I2C-SDA
I2C-SDA
VSM
QUALITY
TUATT
EEP-SCL
EEP-SDA
EEP-SDA
33
I2C_SCK
34
I2C_SIO
9
VOL ATT
100
ATT
5
BEEP
8
AMPSTB
7
DIAG
54
BUIN
12 IN-FL
FL+
FL–
FL–
L
R
RL+
RL–
RL–
FR+
FR–
RR+
RR–
FR–
RR+
RR–
ANT-REM
BATT
ACC
25
OUT-FL
11 IN-RL
23
OUT-RL
MUTE
Q432
MUTE
CONTROL SWITCH
Q491,492
99
ACCIN
ACCESSORY CHECK
Q702
BU+3.3V REG
IC681
TU+5V REG
Q3,D2
MUTE
Q470
29
AMP-REM
5
AMP-REM
REAR
D491
D493
F901
37
BU+B
B.U+5V
FRONT
R-CH
L
J652
R
AUDIO
OUT
MUTE
Q440
BATT
BU+5V
BU+3.3V
BATTERY
CHECK
Q606,607
OVER VOLTAGE
CHECK
Q605,D602,D603
1 BUS-RCH
2 BUS-LCH
2 BUS-LCH
• Signal Path
• R-CH is omitted due to same as L-CH.
: AM
: CD PLAY
: FM
: AUX
CDX-GT373A
CDX-GT373A
18
18
For Schematic Diagrams.
Note:
• All capacitors are in
• All capacitors are in
μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω and
1
/
4
W or less unless otherwise
specifi ed.
• f :
internal
component.
•
C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
•
A : B+ Line.
•
B : B– Line.
•
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
(
)
:
AM
<
> : CD PLAY
*
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J :
CD
PLAY
F :
FM
f :
AM
L :
AUX
For Printed Wiring Boards.
Note:
•
•
X : Parts extracted from the component side.
•
Y : parts extracted from the conductor side.
• a
:
Through
hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
C E
B
These are omitted.
6-2. BLOCK DIAGRAM – DISPLAY Section –
These are omitted.
C B
E
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
Note: The components identifi ed by mark
0 or dotted
line with mark
0 are critical for safety.
Replace only with part number specifi ed.
• Waveforms
– MAIN Board –
– MAIN Board –
0.7 Vp-p
32.768 kHz
1.8 Vp-p
18.432 MHz
0.5 V/DIV, 20
μsec/DIV
0.5 V/DIV, 20nsec/DIV
IC501
J (XOUT)
IC501
JE (OSC OUT)
KEY ACKNOWLEDGE
SWITCH
Q664
X502
32.768kHz
79
80
40
28
29
27
29
27
41
52
48
SYSTEM CONTROL
IC501 (2/2)
LCD DRIVE
IC901
KEYIN1
CL
CE
CE
LCD_SO
LCD_SCK
LCD_CE
57
LED YELLOW
69
SENS2
70
SENS3
LED250
LED251
68
SENS1
47
2
IN–
46
LED RED
DIMMER
KEYIN0
31 RE-IN0
D997
CECURITY
DETECT
IC200
BU+3.3V
BU+3.3V
R290
AMP
IC201
D998
RE-0
RE-1
RE-1
32 RE-IN1
KEY ACK
AD_ON
XOUT
XIN
X501
18.432MHz
82
83 OSCOUT
62 NOSE_SW
OSCIN
47
48
46
2
COM1
I
COM4
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
D503
3
|
34
•
39
35
|
38
S1
I
S33
DI
LCD
BACK LIGHT
SWITCH
Q932
LED931
PANEL+B
(
)
KEY MATRIX
LSW901–910,
S901–904
(VOLUME)
PUSH SELECT
RE901
ROTARY
ENCODER
BACK LIGHT
1
LED(RED)
DRIVE
Q991
LED(BLUE)
DRIVE
Q992
LCD BACK
LIGHT
(
3
IN+
4 OUT
MIC901
)
LSW901–910,
LED861,862
871–874,
941,942,
951–954
951–954
KEY
ILLUMINATE
LED
DRIVE
SWITCH
Q251
SENS
SWITCH
Q200–202
LED
DRIVE
SWITCH
Q250
64 SIRCS
VOLTAGE
DETECT
IC270
REMOTE
CONTROL
SIGNAL
RECEIVER
IC971
CDX-GT373A
CDX-GT373A
19
19
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
A
KEY BOARD CN901
L
R
L
R
J1
(ANTENNA)
-1
-2
(CHASSIS)
CD
MECHANISM
UNIT
(MG-101TC)
F901
X501
AUDIO OUT
REAR
FRONT
1-875-957-
11
YEL
RED
-3
-4
FMB4
D106
D104
JC606
JC353
C203
C703
D493
C704
C705
R673
D491
C509
R217
C215
R9
R672
C302
D200
IC401
R550
R219
C216
R566
R218
JC200
Q606
C15
R481
C155
R204
C445
C997
C998
R200
R529
R203
C200
R251
R570
Q251
Q250
L402
R250
R207
R571
R612
C7
JC513
Q3
C442
R917
JC420
JC4
23
R423
R445
JC516
C493
R554
JC501
JC505
R261
R260
JC36
C313
C315
D998
D702
R706
C702
Q702
JC515
R708
R707
R206
JC506
D602
C494
D603
L409
R262
IC201
C402
R402
R401
L410
C41
8
C419
L406
L401
C307
IC602
C305
JC110
JC1
12
C309
L403
L407
C417
C415
R615
L405
JC34
Q200
Q202
JC35
R351
JC13
R611
JC40
JC508
C301
C325
C516
C330
C304
R574
JC151
D151
JC514
C515
IC681
R507
R537
C440
R549
R525
R520
R534
R557
R544
JC422
R556
R560
C210
R210
R212
R524
R523
JC5
10
R205
JC3
3
JC32
R555
JC2
51
R568
C507
C508
C320
R509
R211
C504
R510
R512
R511
R521
R522
IC501
C513
C501
C512
C514
R504
R505
R502
R50
3
C502
R671
R565
R567
R56
1
L4
R517
Q664
JC5
07
L501
JC602
C510
R519
D999
R674
R563
C519
R636
JC18
D353
R600
D2
JC511
JC601
D609
C312
D112
D152
C681
Q440
Q420
C412
C682
Q605
D153
R531
Q491
Q492
R604
R491
JC1
D502
R603
R3
R4
R2
R5
R10
C3
C6
Q201
L1
R12
R13
R6
R7
C8
JC5
R201
JC1
4
C154
IC200
C157
R155
R153
R152
R151
R154
L151
L901
L902
JC2
4
JC109
R533
R53
2
D113
D108
D109
JC17
JC102
R202
JC509
JC503
D105
D110
JC504
JC100
R303
C211
JC12
R558
JC214
JC6
07
JC512
JC424
R302
C319
C361
C362
C201
R213
R215
R214
C213
R216
R440
R420
R460
R470
R470
R452
R430
R485
JC9
C484
R451
R431
JC30
JC2
9
C443
C426
C423
Q432
Q452
C454
C318
R301
C360
JC8
JC15
JC31
R450
R449
C432
C452
R447
R448
R421
R442
R471
R461
Q460
Q470
C434
R472
R462
C463
C462
C472
C473
Q607
JC421
C444
C424
R540
R526
D503
R443
R424
C310
R915
R916
JC610
C263
JC2
62
R265
R208
R263
R264
C290
R292
IC270
TH270
R271
R272
JC270
JC5
02
TU1
D607
S103
MIC901
RESET
JW105
CN370
IC300
JW61
JW62
JW63
JW64
JW51
JW57
JW116
JW115
JW117
JW118
D304
D303
JW9
9
JW98
JW80
JW89
JW79
JW42
D308
JW8
C622
JW7
JW10
D307
D309
JW90
JW86
JW6
6
JW87
JW88
JW20
JW8
4
JW100
JW23
JW96
C683
JW91
JW34
JW110
JW111
JW112
D311
D312
JW49
JW19
JW50
C316
JW82
JW5
5
JW44
JW1
C314
JW4
JW101
JW2
R705
D301
C212
C152
JW29
JW94
D302
JW92
C403
JW22
JW30
C401
C701
JW2
5
JW40
J652
JW16
JW108
JW39
JW38
C308
JW45
JW103
C306
C405
C409
JW15
JW78
JW81
JW113
JW53
JW43
JW37
JW76
JW59
JW56
JW114
JW36
JW72
JW107
JW109
JW9
JW11
JW52
JW54
JW48
JW74
JW75
JW93
LED251
JW28
JW46
X501
CN350
D310
D306
D305
JW27
JW67
X502
L300
JW58
JW12
JW41
C491
CN300
C623
JW83
JW97
JW3
JW119
JW33
JW32
JW106
C2
C5
JW6
JW5
C153
JW17
JW71
JW47
CN200
1
2
C151
JW13
JW21
C364
C363
JW73
JW35
LED250
C486
C485
C431
C451
C461
C471
C421
C441
JW31
JW68
JW102
JW77
JW18
JW24
JW85
JW104
C303
C317
JW14
JW95
JW26
JW60
JW65
JW70
JW69
C214
R290
(SECURITY(RED))
(SECURITY(YELLOW))
YEL
6-3. PRINTED WIRING BOARD – MAIN Section –
•
: Uses unleaded solder.
19
19
(Page 23)
Ref. No. Location
D2
D2
F-3
D104
I-3
D105
I-3
D106
I-3
D108
I-3
D109
I-4
D110
I-4
D112
I-4
D113
I-4
D151
I-2
D152
I-2
D153
I-2
D200
H-10
D301
D-8
D302
D-8
D303
D-9
D304
D-9
D305
C-6
D306
C-6
D307
C-6
D308
C-6
D309
C-7
D310
C-6
D311
C-7
D312
D-7
D353
G-8
D491
E-5
D493
E-6
D502
H-8
D503
I-5
D602
E-10
D603
E-10
D607
D-9
D609
F-9
D702
C-8
D998
C-9
D999
B-8
IC200
H-10
IC201
I-9
IC270
H-10
IC300
B-6
IC401
D-3
IC501
G-6
IC602
G-8
IC681
D-6
LED250 I-7
LED251 I-6
Q3
F-3
Q200
G-10
Q201
G-10
Q202
G-10
Q250
I-7
Q251
I-5
Q420
C-4
Q432
C-3
Q440
C-4
Q452
C-3
Q460
C-4
Q470
C-4
Q491
E-6
Q492
E-6
Q605
E-10
Q606
E-10
Q607
E-10
Q664
I-5
Q702
C-8
• Semiconductor Location
Ref. No. Location
Refer to the MIC SENSITIVITY ADJUSTMENT described on page 16 if
the microphone (MIC901) or any semi-fi xed resistor (R290) is faulty.
the microphone (MIC901) or any semi-fi xed resistor (R290) is faulty.
CDX-GT373A
CDX-GT373A
20
20
IC B/D
R302
R491
R603
L901
R301
C303
C491
Q491
Q492
C306
L902
C317
R706
Q702
D31
2
D311
D309
D31
0
D308
D307
D306
D30
5
D30
4
D30
3
D302
D301
C319
C701
D493
JC601
JC607
R423
R445
R604
R611
R612
Q606
Q607
JC610
C998
C997
C318
C454 C434
C325
C301
C302
C444
C424 C330
C307
C309
C304
C31
6
C315
C314
C31
3
C31
2
C320
JC30
JC29
JC31
C305
C308
CN300
C704
C705
R707
C702
C703
R708
Q605
JC8
JC1
R600
R531
C683 C682 C681
C622
C623
JC12
JC13
JC14
JC32
JC33
R705
S103
F901
IC300
L300
D999
D998
D607
D702
D603
D602
D491
IC602
IC681
6-4. SCHEMATIC DIAGRAM – MAIN Section (1/3) –
• See page 25 for IC Block Diagrams.
(Page22)
(Page 21)
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