Sony CDX-GT828U / CDX-GT870US / CDX-GT878US Service Manual ▷ View online
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
21
21
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.
• % : indicates tolerance.
•
•
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
(
(
) : MW or AM
<
> : CD PLAY
• 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
F :
FM
f
: MW or AM
L :
AUX
g : BUS AUDIO
c :
USB
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.)
• Waveforms
– MAIN Board –
– MAIN Board –
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.
2.1 Vp-p
6 MHz
1.8 Vp-p
8.664 MHz
3.1 Vp-p
32.768 kHz
1 V/DIV, 50 nsec/DIV
1 V/DIV, 50 nsec/DIV
1 V/DIV, 10 μsec/DIV
IC303
RB (XOUT)
IC50
(XTO)
(CDX-GT828U only)
IC303
(XCOUT)
–KEY Board –
1.5 Vp-p
6.75 MHz
0.5 V/DIV, 50 nsec/DIV
IC901
RB (XOUT)
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
22
22
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
1-875-741-
11
R31
7
IC600
R630
IC620
C443
C455
C442
Q620
Q440 Q420
Q452 Q432
Q352
R448
R447
R442
R449
R450
R421
R45
2
R541
R431
IC401
C307
C453
C330
C305
C325
C304
C424
C444
C301
C31
2
C302
C320
C315
C454
C434
C616
C422
C433
C452 C432
C423
C413
C414
R455
R356
R456
R458
R457
IC601
L604
L407
L401
R600
R334
R355
R444
R441
R657
C309
D609
C338
R446
R609
R353
R35
2
R611
R610
R306
R314
D604
IC302
R401
C342
R606
R344
L408
R379
R607
C435
C425
C352
C445
C369
R402
L410
R38
0
C418
C419
R405
Q605
D603
D602
R603
R604
R333
R701
Q601 Q602
D704
D701
D702
C706
C707
R616
D60
0
D706
D707
R617
R601 R602
C319
R315
C68
1
C682
D705
R71
1
R712
C365
C367
Q703
R706
R707
R708
Q702
R703
R336
R704
Q701
R677
C62
8
D661
R56
R49
1
C161
R15
3
D491
C159
Q491 Q492
C158
R155
R151
R152
R34
7
C332
C3
R691
C8
R618
R371
R619
R2
R3
R4
R5
D630
D631
R378
Q607
Q606
R659
R660
R658
C382
C383
R389
C379
R386
R387
R388
C791
Q3 B C E
R357
R358
R359
C705
R445
R667
C69
4
C6
IC301
C7
R10 D2
R12
R13
L4
R6
R7
C361
C690
C362
C310
R343
C311
Q404
Q405
D353
Q403
C40
2
R642
R403
R647
S D G
R645
R64
4
D622
D623
D621
D620
R404
R63
5
R636
R637
C625
R621
R620
R634
R624
R622
R623
R669
R629
C624
Q622
Q621
R628
R627
L405
Q624
Q623
Q642
L406
R625
C41
2
C630
D625
R613
D640
Q641
R639
C626
R640
R626
R631
D626
R633
C15
1
C152
C153
C164
L402
GT878US
GT828U
GT828U
GT828U
GT870US/
GT878US
GT878US
GT828U
GT828U
GT828U
GT828U
GT828U/GT870US
GT870US/GT878US
GT870US/GT878US
GT870US/GT878US
GT828U/GT870US
C334
C333
C337
R310
C340
C331
R661
5
1
5
1
R339
R346
C317
R301
C318
R364
R365
R366
R481
R362
R632
R901
D612
D611
D613
D618
D617
D617
D616
D156
C162
R349
D605
C704
R348
C67
C634
R673
C91
1
R312
R311
R322
L361
R323
C614
D615
D619
D614
D614
D610
C608
R309
R420
R369
R345
C157
R351
R408
R615
R370
R325
R412
R409
R410
R335
C63
5
R373
R413
R414
L151
R415
R416
R337
C613
R614
IC303
R368
R304
R154
R305
R162
R350
R156
R161
R417
R331
R341
R342
R702
R418
D606
C415
R31
3
C601
L601
L602
IC602
1
7
C606
C605
C603
R638
D601
Q603
C612
C609
C604
C662
C663
C607
R643
R641
R663
R668
R666
R664
R651
R650
R652
R656
R653
R665
R670
C674
C650
D662
Q662
Q663
Q652
Q651
IC603
IC621
R674
R36
1
R374
R375
R302
R303
R383
D152
D151
R163
R475
R476
R479
R474
R480
R472
R470
R471
R473
R463
L409
L1
L306
L308
L307
CN60
5
CN60
4
C58
R15
R14
C50
R55
C51
C52
C53
C53
C55
R54
R52
R52
R53
C54
Q51
R58
R57
Q50
C56 C57
R11
L2
MASTER
FLASH
WRITER
DISPLAY
FLASH
WRITER
L3
R1
Q1
R8
R9
IC50
C695
R648
R649
C686
C697
D691
D69
0
C688
C69
8
C699
C696
C68
9
C691
C672
R384
R385
R363
R316
R391
R612
5-3. PRINTED WIRING BOARD – MAIN Section (1/2) –
•
: Uses unleaded solder.
D2
F-2
D156
H-2
D353
G-8
D491
D-7
D600
H-4
D601
G-9
D602
C-10
D603
C-10
D604
C-10
D605
C-10
D606
C-10
D609
B-10
D610
I-3
D611
I-3
D612
I-3
D613
I-3
D614
I-3
D615
H-3
D616
H-3
D617
H-3
D618
H-3
D619
I-3
D620
I-7
D621
I-7
D622
H-8
D623
H-8
D625
H-9
D626
H-9
D630
H-4
D631
H-4
D640
H-4
D661
H-6
D662
G-9
D690
I-5
D691
I-5
D701
C-8
D702
D-9
D704
C-8
D705
D-8
D706
C-8
D707
C-8
(IC50)
G-2
IC301
D-6
IC302
E-6
IC303
F-7
IC401
E-4
IC600
H-4
IC601
D-9
IC602
F-9
IC603
G-8
IC620
H-9
IC621
H-8
(Q1)
E-3
Q3
E-3
(Q50)
F-3
(Q51)
G-3
Q352
C-4
Q403
F-8
Q404
E-6
Q405
E-6
Q420
C-4
Q432
C-4
Q440
C-4
Q452
C-4
Q491
D-7
Q492
D-7
Q601
H-5
Q602
H-4
Q603
G-9
Q605
D-9
Q606
H-6
Q607
H-6
Q620
I-9
Q621
H-10
Q622
H-10
Q623
H-10
Q624
H-10
Q641
H-9
Q642
H-9
Q651
H-8
Q652
G-8
Q662
G-9
Q663
G-8
Q701
D-8
Q702
D-8
Q703
D-8
Ref. No. Location
• Semiconductor Location (Side A)
Ref. No. Location
( ):CDX-GT828U only
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
23
23
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
CD MECHANISM UNIT
(MG-101I)
(1/2)
GT870US/GT878US
GT828U
-1
L
-2
R
J1
(ANTENNA)
BUS
AUDIO IN
-3
L
-4
R
REAR
FRONT
-5
L
-6
R
AUDIO OUT
1-875-741-
11
A
SUB BOARD
FFC701
CN410
SUB OUT
(MONO)
1
3
-1
-2
WHT
RED
TU1
C406
R705
R710
C421
C45
1
C431
S103
S103
RESET
S302
FRONT PANEL
DETACHABLE
DETECT
C600
C701
T620
C37
1
D30
2
D301
D303
D304
YEL
YEL
D305
C384
D306
D307
D308
D30
9
D31
0
D311
D312
C303
C306
C314
C403
C316
C401
C491
C441
C353
C351
J652
C409
C702
IC300
C623
C339
CNJ400
CNJ400
(BUS CONTROL IN)
J370
(REMOTE IN)
J1
C381
C5
C2
C363
C683
C622
CN350
C364
TH4
00
C405
C629
L300
C620
X301
X302
C633
C632
D607
C703
C308
S302
CN410
1
3
CN300
C621
C617
C602
C611
S301
GT870US/GT878US
GT828U
GT828U
(FREQUENCY SELECT)
C61
X50
CN370
23
22
1
2
C1
L603
C610
FM(50k)
AM(9k)
FM(200k)
AM(10k)
FU601
5-4. PRINTED WIRING BOARD – MAIN Section (2/2) –
•
: Uses unleaded solder.
Ref. No. Location
• Semiconductor
Location (SideB)
D301
C-6
D302
C-6
D303
D-6
D304
D-7
D305
C-6
D306
C-6
D307
C-6
D308
C-6
D309
C-7
D310
C-7
D311
C-7
D312
C-7
D607
D-9
IC300
B-6
(Page 28)
CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
24
24
5-5. SCHEMATIC DIAGRAM – MAIN Section (1/4) –
• See page 32 for IC Block Diagrams.
IC B/D
IC B/D
D303
D304
D301
D302
C303
R607
D604
D605
C622
C306
R315
C623
D603
R604
D602
R603
R706
R708
R703
R704
D705
R711
R712
Q492
C491
R491
D491
L409
R609
Q491
R901
C616
C601
C319
C704
C705
C302
C325
C301
C330
C304
C454
C434
C681 C682
C315
C312
C320
C309
C305
C307
C314
C316
D312
D311
D310
D309
D308 D307
D306
D305
R312
R311
L307
C308
R601
R602
R707
C703
R702
R701
D701
D704
C317
C683
IC302
R600
S103
CN300
D702
D707
C707
D706
C706
L300
D607
C701
C702
R606
D609
R614
R611
R610
C600
R613
R612
C318
R301
IC30
0
C424
C444
C444
FU601
Q701
Q702
Q703
Q605
IC601
CNJ400
J370
R710
R705
R705
TH400
D606
IC301
(Page 25)
(Page 26)
(Page 27)
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