Sony CDX-GT720 / CDX-GT72W / CDX-GT770 Service Manual ▷ View online
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
25
25
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
• 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
J
: CD PLAY
F :
FM
f :
AM
L :
BUS
g : AUX
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : parts extracted from the conductor side.
• a
• 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.)
Note:
The components identi-
fi ed by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specifi ed.
The components identi-
fi ed by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specifi ed.
Note:
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
• Waveforms
– MAIN Board –
– MAIN Board –
• Indication of transistor.
C
B
These are omitted.
E
Q
C E
B
These are omitted.
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.
0.7 Vp-p
32.768 kHz
IC303 (XCIN)
1.7 Vp-p
6 MHz
IC303 RE (XIN)
0.2 V/DIV, 20 sec/DIV
0.5 V/DIV, 0.1 sec/DIV
– DISPLAY Board –
0.4 Vp-p
6.75 MHz
IC901 RE (XIN)
0.2 V/DIV, 0.1 sec/DIV
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
26
26
5-3. PRINTED WIRING BOARDS – MAIN Section (1/2) –
•
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
1-875-875-
(11)
11
1-875-874-
(11)
11
A
BASE PANEL BOARD CN905
1
5
6
10
1
4
5
8
1
4
5
8
1
10
11
20
1
4
5
8
1
1
5
5
1
16
17
32
R391
R36
0
R301
R303
R362
C438
C439
IC402
IC470
C436
LED990
(CD INDICATOR)
R990
R991
IC303
R361
R382
R383
R321
D402
Q110
Q111 Q112
R119
R384
R381
C110
C111
Q624
C313
C317
R374
C331
C332
C421
C422
C429
C430
C432
D121
IC401
D828
C625
C626
C702
C703
C707
CN604
CN605
(CHASSIS)
(CHASSIS)
(CHASSIS)
D101
D108
RED
BRN
D116
D118
D120
Q703
D303
R313
D401
D404
D620
D621
D626
D640
D829
D827
D12
5
IC110
IC302
IC620
IC701
IC702
JR609
Q402
L303
L503
L620
Q103
R375
Q134
Q171
Q181
Q271
Q281
Q301
Q302
Q303
Q401
Q470
Q501
Q621
Q622
Q623
Q641
Q642
Q701
Q702
Q121
Q102
R104
R105
R107
R108
R109
R110
R111
R112
R114
R115
R116
R117
R118
R126
R127
CN801
R304
R305
R309
R335
D836
R318
R319
R322
R323
R325
GT770
GT770
GT770
GT770
GT72W/GT720
GT72W/GT720
GT72W/GT720
D119
R333
R334
R377
R337
R340
R341
R343
R344
R345
R346
R347
R348
R350
R357
R36
5
R366
R373
R336
R40
1
R42
1
R423
R424
R437
R501
R106
R625
R628
R629
R630
R631
R632
R633
C630
D625
R703
R710
R71
1
R120
R12
1
R122
R123
R364
R701
C701
R708
C433
Q101
R400
D301
L30
1
R422
R306
D128
R339
D115
R392
R640
R639
D13
8
D139
C105
C104
R491
R493
R494
C492
R453
R454
R463
R464
R473
R474
R483
R484
C454
C455
C464
C465
C466
C45
6
C474
C475
C476
C484
C485
C486
R457
R467
R477
R487
R495
R496
D112
BRN
RED
R46
1
R451 R481
R47
1
R393
R802
R801
R637
R636
L801
IC703
1
5
L40
2
Ref. No. Location
• Semiconductor Location
D101
B-10
(D102) B-9
(D103) C-9
(D104) D-10
(D105) E-10
D108
(D103) C-9
(D104) D-10
(D105) E-10
D108
D-7
(D109) D-9
(D110) B-8
(D111) B-7
D112
(D110) B-8
(D111) B-7
D112
C-7
(D113) C-7
(D114) C-7
D115
(D114) C-7
D115
C-8
D116
C-8
(D117) C-8
D118
D118
C-6
D119
C-7
D120
C-6
D121
C-6
D125
D-8
D128
E-9
D138
C-9
D139
C-6
D301
F-9
D303
I-5
(D304) G-6
D401
D401
D-5
D402
D-5
D404
G-3
(D501) E-2
D620
D620
I-7
D621
I-7
Ref. No. Location
(D622) I-7
(D623) I-7
D625
(D622) I-7
(D623) I-7
D625
H-7
D626
H-7
D640
I-8
(D703) E-10
(D814) I-6
(D823) H-5
(D824) H-5
(D825) H-5
(D826) H-5
D827
(D814) I-6
(D823) H-5
(D824) H-5
(D825) H-5
(D826) H-5
D827
H-5
D828
H-5
D829
H-5
(D830) H-5
(D831) H-5
D836
(D831) H-5
D836
H-5
LCD990 G-13
IC110
D-9
(IC201) B-6
(IC301) E-5
IC302
(IC301) E-5
IC302
E-5
IC303
F-5
IC401
F-3
IC402
D-3
IC470
E-3
IC620
H-7
IC701
F-11
IC702
F-10
IC703
E-10
Ref. No. Location
Q101
Q101
D-10
Q102
D-9
Q103
D-7
Q110
C-10
Q111
C-10
Q112
C-9
Q121
D-8
Q134
I-3
Q171
B-4
Q181
B-3
Q271
B-4
Q281
B-3
Q301
H-6
Q302
H-6
Q303
I-5
Q401
D-4
Q402
D-4
Q470
C-2
Q501
E-2
(Q620) I-8
Q621
Q621
H-7
Q622
H-6
Q623
G-7
Q624
G-6
Q641
I-8
Q642
G-7
Q701
E-10
Q702
E-10
Q703
E-9
( ) : SIDE B
(Page 32)
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
27
27
5-4. PRINTED WIRING BOARD – MAIN Section (2/2) –
•
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
C514
C201
D103
C112
C142
R201
R202
C205
C210
C211
C215
C225
C227
C228
C229
C232
C242
L
R
BUS
AUDIO
IN
AUDIO
OUT
REAR
AUDIO
OUT
FRONT
-1
-2
L
R
-3
-4
L
R
L
R
-5
-6
C302
C304
C306
C315
C316
C318
C322
C323
C325
C334
C351
C420
D501
C505
C509
C510
C544
C624
D622
C632
D703
C709
C706
C708
D830
D105
D113
D114
D117
C328
C501
D623
C704
C512
D823
D825
D826
R332
D831
D814
D824
FB328
FB329
FB332
C442
FB402
C327
R315
Q620
R102
D104
R142
R143
R242
R243
R312
R314
D304
R327
R342
R644
R352
C352
R328
C419
IC301
R504
R505
R521
R522
R626
R645
R647
R101
R706
R709
CD
MECHANISM
UNIT
(MG-101FC)
FB111
CNJ101
(REMOTE IN)
CNP102
(BUS CONTROL IN)
R707
M904
(OPEN/CLOSE)
BRN
ORG
GRN
BLU
BLK
RED
WHT
BRN
ORG
GRN
BLU
BLK
SWITCH
BOARD
JR607
R351
JR613
FB502
D102
TH301
FB501
FB503
FB504
C628
C491
R455
R456
R465
R466
R475
R476
R485
R486
C457
C467
C477
C487
R620
R621
D111
D110
R614
R613
L304
C342
R428
R427
R425
R426
R354
R35
3
R634
R622
R623
R624
R627
R316
JR618
R641
FB327
FB334
C202
C410
C425
C441
S301
FREQUENCY
SELECTOR
SUB OUT
(MONO)
10k
9k
C103
C204
C426
C43
4
C440
C437
C400
L101
PJ401
CNP102
F901
CN401
TUX501
1
3
T620
1
2
5
6
4
3
8
7
C622
C621
X302
GT770
X302
C321
C221
CNP301
C418
C203
C223
C303
C301
C305
C340
C326
C406
C405
C423
C424
C502
C623
C705
D109
C620
C214
IC201
C226
C333
TH100
X301
PJ501
(ANTENNA)
C629
C513
CN70
2
C121
C102
CNP101
C401
C452
C462
C472
C482
C453
C463
C473
C483
C493
C101
C311
C427
C428
C21
2
CN702
DB-F07
CN2
1-875-874- (11)
11
R420
CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
28
28
5-5. SCHEMATIC DIAGRAM – MAIN Section (1/4) –
• See page 36 for IC Block Diagrams.
IC B/D
IC B/D
D501
C452
C482
C472
C462
C441
R474
R454
R484
R464
C405
C406
C406
R481
R471
R471
R461
R451
R451
C425
C426
R423
R424
R420
R491
C427
C428
R501
R494
C513
R437
C544
R521
R52
2
FB501
C510
FB503
FB504
L503
C420
C419
C419
C436
D404
C418
R426
R428
R427
R425
C423
C423
R421
C421
C422
C422
R422
C424
C434
C433
C491
C440
R453
C400
R463
C439
C438
R473
R483
C492
C410
R493
C514
C50
5
C509
C502
C501
R505
JR609
C437
R504
Q501
PJ501
TUX501
IC401
IC470
IC402
L402
FB502
(Page 30)
(Page 31)
(Page 29)
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