JVC KDS-797 Service manual
SCHEMATIC DIAGRAMS
CD RECEIVER
KD-S797
CD-ROM No.SML200305
KD-S797
COMPACT
DIGITAL AUDIO
Contents
S
Block diagram
Standard schematic diagrams
Printed circuit boards
Area Suffix
UR ------------------------ Blazil
2-1
2-2
2-5 to 7
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
No.49861SCH
2003/05
KD-S797
Safety precaution
!
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
2-4
Block diagram
5
LOAD&FEED
MOTOR
4
3
POSITION SET
SWITCH
SPINDLE
MOTOR
SW1, SW2
PICK UP
IC602
REMOCON
REMOCON
FEED+
FEED-
PSW
SPINDLE+
SPINDLE-
SW1, SW2
VF1,VF2,
VT1,VT2,
LD,MD,
TRACKING+
TRACKINGFOCUS+
FOCUS-
S601 to S617
KEY MATRIX
KEY0
KEY1
KEY2
CN501
EN601
ENCODER
SW1,SW2,PSW
SPINDLE+
SPINDLEFEED+
FEEDTRACKING+
TRACKINGFOCUS+
FOCUS-
VF1,VF2,
VT1,VT2,
MD,LD
ENC1
ENC2
CN601
LM,MSW
IC561
CD
DRIVER
IC501
RF AMP
CD-RW
CN701
DMO,FMO
TRO,FOO
SEL
TEB
RFGC
TE,FE
RFDC
RFRP
RF
IC521
DSP
&
DAC
LO
RO
IC571
L.P.F.
CD.L
CD.R
CDON
CD-RW
BUS0~BUS3
BUCK,CCE
RST
J1
ANT
TU1
FM/AM
TUNER
FMEO
AMEO
FM/AM
FMOSC
IFC
MONO
SD/ST
SEEK/STOP
IC701
CONTROLLER
L-CH
R-CH
VOLDA
VOLCL
IC301
E.VOL
OUTLF
OUTRF
OUTLR
OUTRR
CD.L
CD.R
REGULATOR
EACH BLOCK
IC961
Front L
Front R
REAR L
REAR R
KD-S797
J931
LINE OUT
IC351
POWER
AMP
Front LFFT+
Front LFFTFront RIGHT+
Front RIGHTRear LFFT+
Rear LFFTRear RIGHT+
Rear RIGHT-
CN901
SPK
BATTERY
LCD1
2
COM1
COM2
COM3
S1 to S50
IC601
LCD
DRIVER
LCDCE
LCDDA
LCDCL
1
AB CD E F G
2-1
Standard schematic diagrams
Main amplifier section
KD-S797
KD-S797
47K
R354
47K
R453
820
820
R373
2.2K
R473
2.2K
R474
2.2K
820
820
C961
RB160M-30-X
LA47505
R374
2.2K
R961
1k
2.2/50
D962
0.047
C371
R353
R454
C351
0.33
C451
0.33
C352
0.33
C452
0.33
C372
IC351
47K47K
270p
390p
390p
C354
C353
390p
390p
C453
C454
Q371
2SD1781K/QR/-X
Q471
2SD1781K/QR/-X
Q472
100
R475
C364
B352
1/50
0
Q372
2SD1781K/QR/-X
100100
2SD1781K/QR/-X
R375
R476
C359
22/16
47/16
100
R376
C357
D963
RB160M-30-X
J931
QNN0519-001
C358
0.022
R356
10K
R355
100K
10K
R358
47K
1SS355-X
R357
D351
Q351
UN2211-X
D960
1N5401-F64
C960
3300/16
L961
QQR0703-001
R969
R968
2.2K
2.2K
CN901
QNZ0611-001
F1
QMFZ047-150-T
Tuner signal
CD signal
C970
C355
0.1
D991
D992
D993
D994
D995
D996
D997
D998
C991
C992
C993
C994
C995
C996
C997
C998
100/16
1/50
4.7/25
C361
C362
RB160M-30-X
RB160M-30-X
RB160M-30-X
RB160M-30-X
RB160M-30-X
RB160M-30-X
RB160M-30-X
RB160M-30-X
100p
100p
100p
100p
100p
100p
100p
100p
0.022
C356
0.1 0.1 0.1 0.1
C984 C983 C982 C981
Front signal
Rear signal
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
C365
0
1/50
B351
TU1
QAU0281-001
L1
4.7u
R42
0.056
0.012
C42
Q41
2SC3661-X
2SC3661-X
C31
R32
C32
Q31
2SD601A/R/-X
R775
IC771
HD74HC126FP-X
J1
3.9K
Q42
0.001
Q32
D713
LNJ308G81/1-3/X
D714
LNJ308G81/1-3/X
D715
LNJ308G81/1-3/X
R791
180
10K
QNB0100-002
R43
1K
R33
C17
120p
0.047
C771
R45
R35
R774
100
1SS355-X
D1
1K
10K
C33
C716
330p
R781
330
1K
1K
220/10
R782
47K
R772
D2
100K
R773
1SS355-X
33
R34
D31
UDZS10B-X
SI
SO
I/O
VDD
INT
SCK
22K
0.1/50
C44
C34
12p
C15
150p
C43
0.22/50
FMOSC
0.1
C715
FM/AM
SD/ST
0.047
2SB624/4/-X
R8
4.7K
BUZZER
REM
22/16
C7
Q6
Q8
UN2211-X
D7
MONO
SEEK/STP
FM/AM
ILL
ANT
SW5V
10K
R1
R15
R11
0
R7
47K
1SS355-X
S702
QSW0451-001
C710
R747
R760
R763
R749
R750
R761
VDD
R201
2.7K
R101
2.7K
47K
C2
0.1/50
15
R13
RST
BUS3
BUS2
MONO
BUS1
BUS0
R9
LM
CCE
MSW
BUCK
0
0
R744
R745
UPD178078GF-607
2.2K
270
270
R704
R706
R705
LCDDA
VOLDA
VOLCL
C205
0.033
R4
D3
1SS355-X
0.01
C12
IFC
220/10
C4
47K
Q5
2SB709A/R/-X
10K
R762
SEEK/STP
47K
4.7K
4.7K
0
47K
47K
10K
10K
4.7K
R764
0.01
C11
47K
R6
Q2
UN2211-X
8.2K
R3
22K
R2
PS2
15
R12
SM
10K
R746
C105
0.033
C5
0.01
68
C6
10/16
D4
1SS355-X
R5
3.3k
R727
0
10K
R14
Q7
UN2211-X
R759
0.1
4.7K
10K
R758
10K
10K
0
1.2K
10K
VSS
R701
R702
R708
R710
R711
R712
R713
R703
47k
CD-RW
IC701
2.2K
R707
LCDCL
4.3K
R102
C203
1/50
C103
4.3K
1/50
0.0047
0.0047
C102
C202
R202
MUTE
BUZZER
MSW
LM
2.2K
R709
LCDCE
10K
R730
SW2
1K
47K
47K
47K
47K
R756
R767
R768
R757
R766
R765
10K
10K
10K
10K
150K
150K
R714
R715
R724
R723
R719
R717
KEY1
ENC2
PSW
ENC1
KEY0
LEDR
LEDB
CTRL
1.2K1K4.7K
R755
10K
R721
KEY2
R754
CDON
TELMUTE
R722
4.7K
R720
4.7K
R718
4.7K
R737
47K
R738
47K
REM
10K
R735
CH.L
CD.R
SW1
CD.L
CH.R
R734
R736
100K
4.7/25
C301
C598
4.7/25
C588
4.7/25
C401
4.7/25
47/16
C309
R769
R733
R732
47K
47K
0
QAX0406-001Z
C703
R725
100
0.01
C713
C706
X701
C705
C714
S703
QSQ1A11-V06Z
47K
10K
0.1
47K
QSW0451-001
R753
RESET
VPP
10K
R731
R729
X1
R726
10K
R752
47K
R728
10K
R751
0.047
C711
100/10
C310
22p
22p
S701
D301
220K
R301
IC301
TEA6320T-X
220K
R401
D302
0.1
C707
220/6.3
47K
1SS355-X
C302
0.0082
C402
1SS355-X
10V
R302
22K
0.0082
R402
22K
0.01
C712
R303
R403
2.2K
0.033
0.033
4.7u
0.1
4.7u
0.047
Q964
UN2211-X
C305
C405
B962
0.0056
C306
0.0056
C406
FMEO
AMEO
FMOSC
IFC
SD/ST
SM
MUTE
PS2
R965
47K
Q963
2SB709A/R/-X
0
CTRL
R967
100/10
0.01
C307
C308
VOLCL
D951
RB160M-30-X
R958
220
UDZS5.1B-X
0.22/50
D953
C954
R957
TELMUTE
R893
47K
D961
1SS355-X
220/10
220/10
220/10
0.47
C968
R972
C967
47K
Q971
UN2211-X
C971
22/16
C966
C964
R971
C969
ANT
ILL
12K
R966
27K
C304
0.22
C303
0.18
C404
0.22
0.18
C403
2.2K
L701
C708
220/6.3
C702
L702
C709
51K
B961
VOLDA
220K
47K
R891
IC961
HA13164A
10/16
D976
1SS355-X
4.7K
C952
0.047
Q951
1SS355-X
22/16
D952
C953
Q891
MA152WA-X
C963
10/16
C976
100/6.3
C346
2.2/50
C347
2.2/50
R304
R404
C447
2.2/50
C446
2.2/50
R952
12k
2SD601A/R/-X
47
R955
1K
R956
D892
1SS355-X
C891
0.047
Q976
C975
4.7K
4.7K
1k
R892
UN2111-X
D977
0.01
UDZS11B-X
R953
22k
R954
D891
1SS355-X
C965
C951
1/50
22/16
C977
180k
Q977
100/16
47k
R951
C962
47/16
UN2111-X
5
C41
R41
FMEO
1K
AMEO
C16
7p
QAN0023-001Z
C872
0.1/50
DIM
0.47
C698
D712
R776
100K
R777
22K
R778
100
R31
10V
2.2/50
1.5K
2SD601A/R/-X
4
9V
CD.R
GND
CD.L
PSW
SW1
SW2
LM
MSW
CDON
CD-RW
BUS0
BUS1
3
2
1
BUS2
BUS3
To
CD servo control section
BUCK
CCE
RST
SW5V
CD8V
GND
CN701
QNZ0605-001
To
LCD & Key control section CN601
J771
QNZ0095-001
D701
D702
D703C1D704
D705
CH.R
CH.L
D706
2.2K
BZ871
R871
4.7/25
Q871
UN2211-X
C873
C871
0.1/50
ACC5V
10V
ENC1
ENC2
LCDCE
LCDDA
LCDCL
KEY2
KEY1
KEY0
LEDB
LEDR
0.1
D707
D708
D709
D710
D711
C699
GND
C772
0.01
47K
R779
47K
47K
R347
R346
47K
47K
R447
R446
RB160M-30-X
D964
RB160M-30-X
R914
10K
C914
10/16
D965
R962
R963
R351
27K
R352
27K
R451
27K
R452
27K
R371
R372
1SS355-X
D371
1SS355-X
1SS355-X
1SS355-X
R471
R472
4.7K 9.1K
D372
D471
D472
2-2
HAB C DE FG
KD-S797
CD servo control section
5
15K
0.047
TRACKING+
TRACKING-
100/10
56K
R510
TEB
100/10
22
R508
22
C567
C509
FE
R509
82K
R564
R562
8.2K
4.7K
R563
Q561
2SB1322/RS/-T
R578
R561
33K
C562
0.01
C508
0.01
R516
820
RFDC
R518
R517
DMO
FOO
FMO
C561
47/6.3
B562
22
22
0
R579
D564
1A3G-T1
TRO
C563
100/10
TP2
33K
CD-RW
0
C507
0.0068
TE
SW5V
D561
1A3G-T1
Q521
UN2111-X
L522
4.7u
Q522
UN2211-X
C544
0.01
C587
0.047
C546
100p
C545
100/10
L521
4.7u
47u
L523
0.1
C547
100/10
C555
100/10
C548
C589
4.7K
R537
0.0018
4.7K
R536
4.7K
R535
4.7K
R534
BUS0
BUS1
BUS2
BUS3
CDON
C549
BUCK
CCE
RST
C551
0.01
R538
10k
C552
0.01
100/10
X521
QAX0741-001Z
C550
1/50
R540
R584
C553
R594
150
820p
C594C584
820p
150
C554
18p
18p
0
R533
1M
R581
L524
C592
R591
18K
4.7/25
820p
C591
C581
820p
C582
18K
4.7/25
FMO
DMO
0.01
C539
100/10
C541
100
100
R531
R532
4.7u
C521
R586R587
22K22K
C585
22K 22K
R597 R596
C595
TRO
C540
0.01
100
R528
C522
0.01
47/6.3
FOO
R527
100/10
47/6.3
C538
0.047
C537
0.047
C534
470p
C533
470p
R530
0
R529
0
R526
0
100
IC521
TC94A14FA
C530
R521
5.6K
C527
C526
C525
C524
0.015
R583
12K
0.033
R523
470k
R539
1.5M
R525
33K
R592
C593
12K
R593
120p
C583
120p
R582
33K
C596
0.047
0.047
0.047
C531
C535
C536
C528
0.033
10k
0.01
0.0027
0.01
R524
15K
R522
47K
C523
47p
100/10
C529
100/10
C556
0.01
IC571
R585
R595
NJM4565M-WE
0
C597
0.001
C599
220p
C586
330p
SEL
TEB
RFGC
TE
RFDC
FE
RFRP
RF
0
CD.L
CD.R
9V
9V
CD.R
GND
CD.L
PSW
SW1
SW2
LM
MSW
CDON
CD-RW
BUS0
BUS1
BUS2
BUS3
To Main amplifier section
BUCK
CCE
RST
SW5V
CD8V
GND
R566
IC561
LA6579H-X
3K
R569
5.1K
R577
5.1K
R573
R576
5.1K
R513
1K
R512 R511
2K 10K
C514
R567
R565
6.8K
20k
C566
C565
FEED+
0.1
FEED-
SPINDLE+
SPINDLE-
RFGC
0.0470.047
FOCUS-
FOCUS+
TP1
RF
RFRP
0.1
C510
C564
0.047
0
R570
1.5K
R515
100
C511
5p
CN501
FEED-
FEED+
GND
PSW
SPINDLE-
SPINDLE+
GND
SW1
SW2
TRACKING-
TRACKING+
FOCUS+
4
FOCUS-
LD
GND
MD
VR
VF1
VREF
VT1
GND
VT2
VCC
VF2
GND
FEED-
VF2
FEED+
VCC
GND
VT2
SW1
VT1
SW2
VF1
PSW
VR
SPINDLELD
SPINDLE+
FOCUS-
VREF
FOCUS+
MD
TRACKING+
TRACKING-
QGB2027M4-22S
FEED-
VF2
FEED+
VCC
VT2
SW1
VT1
SW2
VF1
PSW
VR
SPINDLE-
LD
SPINDLE+
FOCUS-
VREF
FOCUS+
MD
TRACKING+
TRACKING-
150
VREF
R519
C513
0.01
R514
MSW
8.2K
R568
R572
LM
1.5K
R571
1.5K
C512
82p
15K
3
IC501
TA2157FN-X
82K
C501
0.01
R503
R504
R505
R506
C502
0.01
82K
330K
330K
C503
100/10
C504
SEL
MD
LD
0.01
C505
R507
Q501
2SB1241/QR/-T
VF1
VF2
VT2
VT1
VCC
2
CD signal
1
AB CD E F G
2-3
KD-S797
KD-S797
LCD & Key control section
5
IC602
RPM6938-SV4
4
LCD1
QLD0256-001
3
S617
R615
3.9K
S606
R605
2.7K
S605
R610 R609 R608
2.7K
1.8K 1.2K
R614 R613
1.2K 820
R602R603R604
8201.2K1.8K
S1S2S3
S4S5S6S7S8S9S10
R601
KEY2
820
S602S603S604
S601
R606R607
820820
S607
S608S609S610S611S612
R612
820
S613S614S615S616
KEY1
KEY0
R649
R648
1.2K
D602
S15
S17
S18
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S34
S35
S36
S37
S11
S13
S14
S16
R646
D601
S19
560
R645
R644
1.2K
D603
D604
D605
820
560
820
R642
R641
R643
D606
D607
510
510
510
R639
R640
D609
D610
D611
S12
R647
1.2K
1.2K
S38
S33
510
820
R638
R637
D613
D614
D615
R636
D617
S39
D616
S44
S40
S41
S42
S43
S45
S46
S47
820
560
560
R634
R635
R633
D619
D620
D621
COM3
COM2
COM1
S49
S50
S48
R651
2.2K
LCDCE
LCDCL
LCDDA
C603
10/6.3
R653
R654
R655
R656
D642
D643
R652
2.2K
R658
1SS355-X
1SS355-X
180K
10K
10K
10K
10K
D641
UDZS5.1B-X
0.022
C601
C602
680p
R672
0
560
560
R632
390
390
R660
D625
SML-310LT/MN/-X
820
R631
R659
D644
D645
NSPW310BS/BRS
Q640
2SB624/4/-X
R674
Q641
UN2211-X
NSPW310BS/BRS
47K
R673
1K
D622
D623
D624
R661
D646
UDZS6.2B-X
10K
C612
C611
0.012
4.7/6.3
S42
S43
S44
S45
S46
S47
S48
S49
S50
R671
DIMMER
0
COM1
COM2
R657
51K
COM3
OSC
CE
CLK
DATA
S2
S1
IC601
PT6523LQ
S3S4S5S6S7
C682
0.022
R662
470
S35
S36
S37
S40
S41
S38
S39
S9
S8
S11
S10
S12
S13
S14
EN601
QSW0793-001
100
R681
C681
0.022
S33
S34
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
DIMMER
NNZ0087-001
R670
0
CN601
REM
ACC5V
10V
ENC1
ENC2
LCDCE
LCDDA
LCDCL
KEY2
KEY1
KEY0
DIM
GND
To
Main amplifier section CN701
2
DIMMER
1
2-4
HAB C DE FG
Printed circuit boards
Main board
5
C960
CN901
B354
C365
C991
R357
C503
C355
D991
C359
C358
C364
R358
R355 R356
B501
4
IC351
B353
3
R969
R968
C992
D992
Q351
C362
IC501
C993
C361
R578
D993
R579
C994
D994
B355
D996
C451
Q561
C996
C995
C970
D963
D995
D998
C352
CN501
C568
D962
C998
C452
C997
C961
D997
C351
C977
IC561
C346
C347
R730
C586
R961
D561
C976
C447
L961
D960
C969
C446
C951
D564
Forward side
C964
D965
IC961
R965
C963
C914
D964
Q963
C968
C971
C307
C404
C405
C304
C305
C967
C310
B961
B962
Q964
IC301
R967
C309
R966
C965
C962
J771
C301
C401
R373
Q371
L701
IC701
C31
C33
D371
Q471
R736
R473
C707
C4
L702
C103
C203
J931
R374
D471
C44
C7
C34
D372
KD-S797
D472
Q472
R474
J1
L1
C6
TU1
B2
C871
B3 D7
C2
BZ871
S701
R581
C584
D713
D714
D715
C591
C581
C598
C593
R707
R709
R791
C953
C582
C588
IC571
R706
C954
C585
C596
C583
R757
R735
IC771
R708
R713
R712
R777
R738
R737
R718
R720
C708
X701
R722
C873
C872
S703
C505
Q501
C529
C533
C534
C531
C535
S702
2
C536
C537
C538
R529
R530
C509
R527
R528
IC521
C530
R531
R532
C522
C539
C561
CN701
B503
X521
L524
C552
R538
C587
C550
C548
C545
C551
C563
L521
R537
R536
L522
L523
C595
C555
C592
R594
R591
C594
R584
1
AB C
2-5
KD-S797
5
Main board
Reverse side
R514
R512
C514
R525
C510
R510
C362
C359
C528
C512
R513
R511
C509
C698
CN501
C564
C508
R518
CN701
C699
C364
C507
CN901
C358
B502
R503
R515
TE
C511
C526
FE
B351
C365
B352
R506
C355
R509
C527
R521
C525
R526
R505
R523
R516
C353
R504
Q501
R524
C453
C502
C505
C524
S702
B354
C354
C503
R508
R507
R539
C556
C981
C982
C983 C984
C529
C356
C454
B353
C960
IC351
C357
C710
D961
R954
D703
C891
C403
C406
R957
R953
C582
D702
C914
D891
R403
Q951
C968
C971
C598
C963
C953
C307
C308
R955
R956
R593
R595
R596
R597
C964
Q971
C306
Q522
R914
R971
R573
R962
R576
C969
C303
R572
C595
R963
C446
R303
C951
Q521
R571
C592
C599
C976
R972
R404
R592
D564
D976
C447
C346
C347
R304
L522
D701
C975
L523
D711
Q976
D710
R961
D977
C563
C555
D712
L961
D561
R577
L521
C597
C544
B562
R569
C562
D960
Q977
R346
R711
C547
C961
R351
C551
C548
R710
C567
R564
C972
R563
C545
C546
B355
R352
R561
R446
R451
R452
R447
R562
C977
R565
C352
R347
R353
R566
C550
C549
C566
R570
R540
R568
R535
C553
C351
C452
R534
C589
R454
C513
R567
R354
B356
C504
C541
C565
C554
L524
C521
C561
D351
TP2
TP1
R517
R533
X521
R519
R522
R453
C522
C523
C540
C451
C361
C501
Q561
C539
R734
R732
R772
R371
C401
C711
R774
Q42
R721
R773
R769
D31
VSS
C42
R34
R719
C15
Q31
R32
R13
R33
Q32
R754
LM
MSW
R717
R781
R782
R41
R43
R31
R12
R755
R715
J771
C772
R714
R776
R893
R744
R703
C301
R745
R702
B703
R766
R765
R768
R767
R705
R724
Q891
C302
R301
R302
R756
R723
C962
C309
R758
R704
R958
D953
R779
R701
R778
R775
C771
R891
R401
C402
R763
R582
R583
C966
C965
R585
R586
R587
R892
R761
C310
R764
C596
C715
IC961
D892
D301
D302
R759
D709
C967
R749
C585
D705
R747
D704
R402
R750
R746
D952
D951
D706
R952
C588
D708
R951
C952
C954
D707
R475
C371
C372
R476
J1
J931
B1
4
C43
C1
R15
C5
C105
C205
C13
C11
R3
R2
3
R6
Q2
S701
R472
R102
R101
R202
R14
C12
R762
R727
R9
R751
R376
R372
TU1
BZ871
R1
C44
C34
C712
R760
C2
L1
R5
C7
C6
C4
C102
R201
B705
C373
Q5
C702
C202
Q372
Q6
C103
C203
C713
D4
R11
R35
R871
R471
R375
Q41
D1
D2
C41
R45
D3
C33
R42
Q8
C32
R8
R4
C31
R7
C17
C16
L701
L702
Q7
C709
RESET
B702
R731
C716
R733
C707
VDD
VPP
R729
B704
C708
C703
C706
R725
X1
X701
R728
R726
B701
C705
C871
Q871
C873
R752
R753
C872
C714
S703
2
2-6
1
AB CD
Front board
KD-S797
5
D625
D603
D604
D601
D605
S607
S613
R649
D606
R648
R606
R607
S608
D602
LCD1
D609
S615
D610
S609
IC602
EN601
D607
S614
4
Forward side
D613
S610 S611
R609
D611
R610
D614
D615
S612
S601
D645
R601
R602
S616
D644
R603
S606
D616
D619
S617
R615
S602
D624
D620
R605
R604
D623
D622
S603
S605
D621
S604
D617
3
Reverse side
R631
R614
R613
R632
R633
R636
R637
2
Q640
R672
Q641
R635
R638
R639
R673
R634
R674
R671
R670
R659
R660
R652
R651
D641
R653
C603
C601
D643
D642
R658
R657
C602
R655
CN601
R608
R656
R654
R612
R661
R642
C612
R662
D646
R643
C682
R646
R644
IC602
C611
R681
C681
R645
R640
R641
R647
1
AB C
2-7
KD-S797
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.49861SCH)
Printed in Japan
2003/05
SERVICE MANUAL
CD RECEIVER
4986120035
KD-S797
S
Area Suffix
COMPACT
UR ------------------------ Blazil
DIGITAL AUDIO
TABLE OF CONTENTS
1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
No.49861
2003/5
1.1 Safety Precautions
SECTION 1
Important Safety Precautions
!
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
1-2 (No.49861)
1.2 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron plate
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.3 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long
a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the CD pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the CDpickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.
Short-circuit point
(Soldering)
Flexible wire
Short-circuit point
Pickup
Pickup
(No.49861)1-3
SECTION 2
Disassembly method
2.1 Main body
2.1.1 Removing the front panel assembly
(See Fig.1)
(1) Push the detach button in the lower left part of the front
panel assembly and remove the front panel assembly in
the direction of the arrow.
Front panel assembly
2.1.2 Removing the front chassis assembly
(See Figs.2 to 4)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Remove the screw A on the both sides of the main body,
and two screws B on the front chassis assembly.
(2) Release the two joints a and the two joints b on both
sides of the main body using a screwdriver, and remove
the front chassis assembly forward.
Detach button
Fig.1
Joint a
A
Joint a
Front chassis assembly
Fig.2
Joint b
A
1-4 (No.49861)
Joint b
Front chassis assembly
Fig.3
B
Fig.4
2.1.3 Removing the heat sink
(See Fig.5)
(1) Remove the two screws C and two screws D on the left
side of the main body.
C
2.1.4 Removing the bottom cover
(See Figs.6 and 7)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly and heat sink.
(1) Turn over the body and release the two joints c, two joints
d and joint e.
CAUTION:
Do not damage the main board when releasing the joint e us-
ing a screwdriver. (See Figs.6 and 7)
Joint c
Joint e
D
Heat sink
Fig.5
Bottom cover
Joint d
Fig.6
Joint d
Bottom cover
2.1.5 Removing the rear bracket
(See Fig.8)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly, heat sink and bottom
cover.
(1) Remove the three screws E, three screws F and two
screws G on the back of the body.
(2) Remove the rear bracket.
Joint e
Joint c
FG
Rear bracket
EE
Fig.7
F
Fig.8
(No.49861)1-5
2.1.6 Removing the main board
(See Fig.9)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly, heat sink, bottom
cover and rear bracket.
(1) Remove the two screws H attaching the main board.
(2) Disconnect connector CN501 and remove the main board.
2.1.7 Removing the CD mechanism assembly
(See Fig.10)
• Prior to performing the following procedure, remove the front
panel assembly, front chassis assembly, heat sink, bottom
cover, rear bracket and main board.
(1) Remove the three screws J .
H
CN501
Main board
H
Fig.9
J
CD mechanism assembly
Top chassis
J
Fig.10
1-6 (No.49861)
2.1.8 Removing the front board
f
(See Figs.11 to 13)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Remove the four screws K on the back side of the front
panel assembly.
(2) Release the ten joints f .
(3) Take out the front board.
K
KK
Fig.11
Joint f
Joint
Joint f
Front board
Fig.12
Joint f
Fig.13
(No.49861)1-7
2.2 CD Mechanism Assembly
A
2.2.1 Removing the top cover
(See Figs.1 and 2)
(1) Remove the two screws A on the both side of the body.
(2) Lift the front side of the top cover and move the top cover
backward to release the two joints a.
Top cover
Joints a
A
Joints a
A
Fig.1
Fig.2
Top cover
1-8 (No.49861)
2.2.2 Removing the connector board
(See Figs.3 to 5)
CAUTION:
Before disconnecting the flexible wire from the pickup, solder
the short-circuit point on the pickup. No observance of this instruction may cause damage of the pickup.
(1) Remove the screw B fixing the connector board.
(2) Solder the short-circuit point on the connector board.
(3) Disconnect the flexible wire from the pickup.
(4) Move the connector board in the direction of the arrow to
release the two joints b.
(5) Unsolder the wire on the connector board if necessary.
CAUTION:
Unsolder the short-circuit point after reassembling.
B
Connector board
Flexible wire
Wires
Joints b
Short-circuit point
Fig.3
Short-circuit point
(Soldering)
Pickup
Flexible wire
Frame
Pickup
Fig.4
B
Connector board
Fig.5
(No.49861)1-9
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