JVC KDS-641 Service manual
SCHEMATIC DIAGRAMS
CD RECEIVER
KD-S641
CD-ROM No.SML200301
KD-S641
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
LOUD
SEL
DISP
7 9 10 12
FM
CD
SS M
MO
8
RND
11
RPT
AM
SCMMODE
Area suffix
E --------------------- Continental Europe
2-1
2-2
2-5,6
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
No.49769SCH
2003/01
KD-S641
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.
Block diagram
5
SW1,SW2,PSW
CJ701
ANT
TU701
FM/AM
TUNER
TU.LCH
TU.RCH
LRO
RRO
KD-S641
CJ321
LINE OUT
EQ
MICOM
IC801
FM/AM
FM.OSC
IFC
AGC
S.METER
SD/ST
SDA
SCL
IC301
E.VOL
OUT LF
OUT RF
OUT LR
OUT RR
CD.LCH
CD.RCH
REGULATOR
EACH BLOCK
IC901
IC321
POWER
AMP
LF+, LFRF+, RFLR+, LRRR+, RR-
LM,MSW
SPINDLE+
CN501
SPINDLEFEED+
FEEDTRACKING+
TRACKINGFOCUS+
FOCUS-
VF1,VF2,
VT1,VT2,
MD,LD
POSITION SET
PSW
SWITCH
4
LOAD&FEED
MOTOR
SPINDLE
FEED+
FEED-
SPINDLE+
SPINDLE-
MOTOR
SW1, SW2
PICK UP
SW1, SW2
VF1,VF2,
VT1,VT2,
LD,MD,
TRACKING+
TRACKINGFOCUS+
FOCUS-
IC541
SERVO
BTL
DRIVER
IC501
RF AMP
TRV,TVD,
ECM,ECS,
KICK,TRD,FOD
TBAL
FBAL
FE,TE
TRCRS
VDET
LDON
ARF
BDO
OFTR
/RFDET
RFENV
IC561
DSP
&
DAC
OUT L
OUT R
IC151
L.P.F.
CD.SENSE
/CD.RESET
STATUS
SUBQ,SQCK
BLKCK,/TLOCK
/FLOCK,MLD
MDATA,MCLK
CD LCH
CD RCH
MONO
CN901
3
NOT USED
REMOCON
IC602
REMOCON
S601~S620
KEY MATRIX
KEY0
KEY1
KEY2
CJ601
CN801
SPK
BATTERY
LCD1
2
COM1
COM2
COM3
S1 ~ S48
IC601
LCD
DRIVER
LCD.CLK
LCD.SO
LCD.CE
1
AB CD E F G
2-1
Standard schematic diagrams
Main amplifier section
5
4
CJ701
QNB0100-002
2SC1623/5-6/-X
C731
2.2/50
C732
0.001
Q731
2SC1623/5-6/-X
Q732
R736
R735
1.5k
1k
R733
KD-S641
TU701
QAU0281-001
4.7u
L701
470
8.2k
R708
22k
R798
SD/ST
R799
220/10
C720
47k
R201
R101
0.1/50
C712
Q701
UN2211-X
MONO
470
1/50
1/50
7.5K
7.5K
R202
R102
C101
C201
MICON.MUTE
TU.RCH
TU.LCH
1k
R703
1k
R701
220p
47/10
1SS133-T2
D702
D792
1SS355-X
2.2k
R793
C717
10k
C701
Q793
UN2211-X
0.1/50
C703
Q791
2SB1197K/QR/-X
1SS133-T2
R797
D701
Q792
2SA812/5-6/-X
10k
220/10
C733
D731
MTZJ10B-T2
R734
470
D791
1SS355-X
R794
EO
0.022
C718
R792
R725
0.1/50
0.022
0.022
C702
R702
10k
C714
C709
C710
R705
R704
150p
C713
100p
0.01
C711
Q702
AGC
SW5V
S.METER
0.01
C725
C716
R791
10k
C715
15
15
1k
R796
R795
DTC144EKA-X
FM.OSC
IFC
9V
FM/AM
KD-S641
D869
D867
1SS355-X
1SS355-X
470
470
R862
R861
D861
UN2111-X
220/6.3
MTZJ4.7B-T2
C861
D866
C862
Q861
D868
1SS355-X
0.082
1SS355-X
MUTE
1k
D332
1SS355-X
D333
1SS355-X
R333
R336
R436
R433
2.2k
Q332
2SD1781K/QR/-X
2.2k
Q432
2SD1781K/QR/-X
1k
LRO
RRO
R334
R434
100
100
IC321
LA4743K
CJ321
R307
SDA
4.7/25
C408
9.1k
R901
LRO
47k
4.7/25
100/10
0.01
C310
C309
47k
IC901
HA13164A
22/16
C904
C903
22/16
PSW
SW1
SW2
LM
MSW
CD8V
CD.RESET
STATUS
3
To
CD servo &
control section
2
SUBQ
SQCK
TLOCK
FLOCK
CD.SENSE
MLD
MDATA
MCLK
BLKCK
CD.RCH
CD.LCH
9V
To
LCD & Key control
section CJ601
CN801
VMC0334-001
0.1
C821
0.1
C822
0.1
C823
D821
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
D823
D822
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
D824
D825
D826
DETACH
ILL_10V
R5V
REMOCON
LCD.SCK
LCD.SO
LCD.CE
KEY0
KEY1
KEY2
UDZS6.2B-X
UDZS6.2B-X
D827
D828
DETACH
LM
CD.RESET
MCLK
MDATA
MLD
SCL
SDA
ILL_10V
D803
D805
D802
D804
D801
1SS133-T2
1SS133-T2
1SS133-T2
1SS133-T2
1SS133-T2
R808
JES01-9B42
R813
IC801
ILL_10V
MSW
LCD.CE
3.3k
R805
1k
3.3k
R811
3.3k
R812
47k
R809
10k
0100
R843
R807
R814
R815
R816
R840
R841
R842
47k
47k
47k
47k
47k
47k
R845
0
47k
BLKCK
R844
FLOCK
TLOCK
CD.SENSE
SW1
SW2
PSW
LCD.SO
LCD.SCK
3.3k
3.3k
R804
R803
R822
PS2
STATUS
2.2k
SD/ST
10K
R801
R817
SQCK
4.7k
R818
47k
FM/AM
REMOCON
SUBQ
MONO
AGC
MICON.MUTE
S.METER
R830
KEY2
R831
R829
R828
R827
R826
R825
R823
CD.RCH
22p
C803
X801
QAX0406-001Z
33p
C804
EO
TU.LCH
10/16
KEY1
TU.RCH
C802
0.01
C801
IFC
220/6.3
C824
220p
L801
4.7u
SW5V
R5V
VDD
CD8V
KEY0
C911
220/10
FM.OSC
47k
D810
R836
1SS355-X
C807
22k
R834
22k
R832
4.7k
4.7k
R833
R835
22k
4.7k
47k
47k
47k
47k
47k
47k
9V
CD.LCH
Q902
2SC1623/5-6/-X
47k
R910
Q903
2SA812/5-6/-X
IC301
TEA6320T-X
C312
27k
R909
47/16
C311
R908
R302
2.2k
R301
22k
C303
0.18
C304
C305
0.033
0.22
C405
C404
0.033
0.22
C403
C402 C302
0.18
100/10
0.0082 0.0082
R401
22k
R402
2.2k
D903
1SS133-T2
R907
39k
68k
4.7k
100K
4.7k
R906
R905
R904
0.01
C910
100/10
C909
100/10
C908
0.01
C907
22/16
C905
C306
0.0056
C406
C307
0.0056
R403
4.7k
R903
R303
4.7/25
C407
0.1
C906
47k
47k
4.7/25
R304
C308
R404
1
C334
SCL
RRO
27k
1/50
220p
C319
C320
220p
C335
R308
27k
1/50
C435
R408
27k
1/50
C420C419
220p220p
C434
R407
27k
1/50
2.2
47k
C915
R911
C902
0.01
C901
2200/16
D901
1N5401-F64
L901
QQR1378-001
R902
1k
C916
2.2/50
C331
0.022
C330
0.022
D904
C427
C321
100/16
C432
0.1
RF+
RR+
LR+
RB160M-30-X
LF+
C914
RF-
RR-
D905
LR-
LF-
RB160M-30-X
22/16
C328
47/16
LR-
LF+
LR+
LF-
C332
0.1
C333
0.1
C433
0.1
RF+
RF-
RR+
RR-
47k
C329
4.7/25
R323
1k
0.1
C327
4.7/25
D902
SB10-03A3-T2
R321
R322
470
UN2211-X
1SS133-T2
Q321
CN901
F1
QMFZ047-150-T
MUTE
D321
2-2
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
Tuner signal
CD signal
Front signal
Rear signal
HAB C DE FG
CD servo control section
KD-S641
LM
5
4
IC541
LA6589H-X
CN501
FEED-
FEED+
PSW
SPINDLE-
SPINDLE+
3
SW1
SW2
TRACKING-
TRACKING+
FOCUS+
FOCUS-
LD
GND
MD
VR
VF1
VREF
VT1
GND
VT2
VCC
VF2
FEED-
GND
FEED+
VF2
GND
VCC
SW1
VT2
SW2
VT1
PSW
VF1
SPINDLE-
VR
SPINDLE+
LD
VREF
FOCUS-
MD
FOCUS+
TRACKINGTRACKING+
QGB2027M4-22S
R557
150
VR
FEED-
FEED+
SPINDLE+
SPINDLE-
FOCUS-
FOCUS+
TRACKING-
TRACKING+
VF2
VCC
SW1
VT2
SW2
VT1
PSW
VF1
LD
MD
VT1
VT2
VF2
VF1
18k
R552
0
R553
R512
56k
R513
56k
R516
12k
R517
12k
2
IC501
AN8806SB-W
MD
VCC
C501
0.01
LD
C527
0.022
R501
22
2SA1706/ST/-T
Q501
C502
R502
22
MSW
C552
0.01
TRV
TVD
R549
12k
3.3k
R546
R545
R596
8.2k
C540
68p
2k
R551
51k
R554
C556
C555
0.047
0.047
SPINDLE+
SPINDLE-
FEED-
FEED+
C524
0.001
C525
0.001
GND
BT
GND
BT
C503
68p
100/10
1k
R503
68p
C530
C504
LDON
ECS
FOD
ECM
47k
560
5.1k
R542
R544
R543
C543
0.033
6.8k
R541
R550
11K
C557
C558
0.047
0.047
TRACKING+
TRACKING-
FOCUS-
FOCUS+
FE
TBAL
FBAL
C528
0.0018
R511
R510
270k
150k
C522
0.022
C523
0.022
C526
3p
2k
R524
R504
2k
R525
910
C505
100/10
R518
8.2k
FE
TE
TP TP
R509
R508
15k
C520
C521
560p
0.1
C507
C506
150p
0.01
100p
C508
1/50
C509
RF
TP
ARF
Q541
2SA1706/ST/-T
C542
R507
R506
22k
39k
47p
0.027
C510
0.0033
TE
8.2k
C541
22/16
C529
0.0012
C518
R505
0.22
220k
C519
0.047
GND
GND
BT
BT
IC2
0.0047
0.01
C511
C512
BDO
TRCRS
1M
R519
VDET
OFTR
C513
330p
5.6k
R548
VREF
TP
C516
GND
GND
RFDET
TRD
KICK
220k
R547
0.1
C515
C514
0.01
100/10
RFENV
L501
4.7U
C551
220/10
D551
1A3G-T1
TRV
TVD
ECM
ECS
KICK
TRD
FOD
FBAL
TBAL
FE
TE
RFENV
VDET
OFTR
TRCRS
RFDET
BDO
LDON
ARF
IC561
MN6627482WA
MLD
SUBQ
SQCK
STATUS
CD.RESET
1k
1k
1k
1k
1k
0.01
R568
R567
R579
R569
R570
C562
C563
0.001
TP
ARF
R571
33k
R577
100k
R573
33k
220k
0.27
C564
R580
0.01
0.1
C568
C567
C565
100/10
4.7U
L561
R151
18k
C151
C251
C252
R251
18k
4.7/25
9V
BLKCK
220
0.001
0.001
TLOCK
R574
0.47
C566
FLOCK
1k1k1k
R564
0.0015
C576
CD.SENSE
R563
R562
0
0
R581
C152
4.7/25
C155
47/6.3
R154
22k
R254
22k
C255
47/6.3
MDATA
1k
R561
R576
MCLK
0.01
C561
PSW
SW1
SW2
LM
MSW
CD8V
CD.RESET
STATUS
C570
0.022
C574
0.01
C573
220/10
R560
100
L562
X561
220
R575
R156
22k
R256
22k
QAX0714-001Z
0.001
0.1
C577
C579
R153
27k
R152
12k
C253
R252
12k
150p
R253
27k
4.7U
C572
C571
0.01
100/10
R155
1.5k
C153
150p
IC151
NJM4565M-WE
R255
1.5k
C256
100/10
SUBQ
SQCK
TLOCK
FLOCK
CD.SENSE
MLD
MDATA
MCLK
BLKCK
CD.RCH
GND
CD.LCH
To Main amplifier section
1
CD signal
AB CD E F G
2-3
KD-S641
KD-S641
LCD & Key control section
5
IC602
RPM6938-SV4
C611
C612
0.012
UDZS6.2B-X
S48
S46
S47
S1S2S3
D644
R661
10k
S36
S37
S38
S39
S40
S41
S42
S43
S44
S45
S8
S9
S4
S5S6S7
S10
S11
S12
4
LCD1
QLD0210-002
S12
S603
560
560
S8S9S10
S602S604S605S606
S608
S11
S13
S14
S15
S16
R601R602R603R604R605
680
S601
R606R607R611 R610 R609 R608
680
S607
R612
680
S615S616S617
S614
S2
S3S4S5S6S7
S1
6809101.2k
3
1.5k 1.2k 910 680
R616
R615
S618S619
R617
1.5k 680 5609101.2k
S620
S609S610S611S612S613
R614 R613
S17
KEY0
KEY1
KEY2
S22
S19
S20
S21
S18
S28
S23
S24
S25
S26
S27
S30
S31
S29
S32
S33
S34
1
D606
D603
VOL-
1k
R644
VOL+
D604
D605
680
R643
LOUD
SEL
DISP
680
R642
D607
D608
D609
390
R641
2
3
4
390
R640
D601
D602
1k
R645
S40
S39
S41
S37
S38
S42
S43
S46
S47
S48
S44
D613
1.2k
R637
SCM
1.2k
R636
D615
D616
D617
1k
R635
S45
C602
680P
COM1
COM2
COM3
IC601
R657
51k
FM
1k
R634
COM2
COM3
COM1
R651
10/6.3
C603
R653
R654
R655
R656
D642
D643
R658
2.2k
R652
2.2k
10k
10k
10k
10k
1SS355-X
1SS355-X
180k
D641
UDZS5.6B-X
C601
0.022
D731
680
R731
R732
D732
LCD.CE
LCD.CLK
LCD.SO
680
POWER
UDZS6.2B-X
UP
D620
D618
D645
DOWN
CD
D619
AM
2.2k
2.2k
820
R632
R633
R631
S35
S36
5
D610
D611
6
D612
MODE
EJECT
D614
390
390
R638
R639
R662
4.7/6.3
470
CJ601
VMC0355-001
ILL-10V
R5V
REMOCON
To
Main amplifier
S33
S34
S35
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S13
S14
S15
S16
LCD.CLK
LCD.SO
LCD.CE
KEY0
KEY1
KEY2
GND
section CN801
2
W
1
2-4
HAB C DE FG
Printed circuit boards
Main board
5
KD-S641
Reverse side
B458
C513
R503
C905
C904
C506
R504
R524
C507
B552
R156
R910
C516
B553
C256
R155
R153
C152
C151
C530
C526
L901
R903
C998
L801
C252
R152
R151
C153
D904
C915
R911
R822
R525
C906
R901
C504
R254
R256
C911
C525
C155
R154
C524
D321
C502
D905
D901
R510
C255
C902
Q321
C307
C407
C527
C563
C568
R251
C503
R572
IC151
B152
C505
R513
R516
R573
C251
C308
C565
L562
C327
R517
B554
C567
C408
Q501
R511
C557
L561
B150
CN501
L501
R571
B558
C916
C558
B601
C523
C522
C566
R578
R323
R321
R322
R502
R512
C576
R581
R501
R550
R303
B151
Q541
R580
R574
C577
R307
C319
R576
C579
B352
R304
C542
R577
R575
R308
C320
C556
R547
R544
R543
C543
C564
R542
B607
R553
B556
B557
R541
R548
B606
R545
R546
X561
C329
C554
R557
C553
C571
IC541
R596
B602
B605
C914
C555
D902
R407
C540
B351
C434
IC561
C334
R403
B604
C572
B600
R902
C419
C573
R560
C435
C321
C562
C561
C335
B603
C570
R404
R554
C420
R552
R551
C574
B353
C427
R408
C328
R556
C541
C330
C996
B354
C333
C433
R563
C332
C551
R570
R569
R568
R579
D555
C901
C432
C597
C552
Q555
C331
C995
R862
R861
R795
C703
C101
B827
R817
B366
R796
C701
R829
R830
Q432
R797
R823
R826
B756
R832
R834
R433
C822
R434
R436
Q792
R102
R101
R201
R202
R708
B853
R798
C861
C451
R827
R818
B451
B454
D869
D867
B452
C336
D333
R807
R814
R815
D822
Q861
R841
R809
D861
R836
R835
D866
C807
C801
D868
D826
D810
C404
C402
C403
R825
D827
C304
R828
B453
C802
CN801
C302
R840
C303
R844
C862
C804
R843
B852
C312
C311
R906
X801
R833
B851
R905
R831
C903
R812
D828
R904
C803
B898
C405
R401
C501
B551
R801
R567
C833
C910
IC801
D824
R402
D823
C310
D825
R519
R803
C909
R302
R301
C305
C406
C512
C306
IC301
C309
C511
R842
R813
R562
R804
R334
Q332
R333
R336
D332
CJ701
D731
L701
B759
C709
C710
C712
Q791
Q731 Q732
C719
R735
R733
R701
C823
B752
C720
B757
Q701
C821
R734
C733
B751
B758
D821
C716
R725
C725
C718
C717
C711
C824
R793
C201
Q793
Q702
R808
D792
D791
B753
B754
B755
R791
R703
R736
C732
R794
C731
C715
D702
D701
C999
C702
C714
R702
R704
C713
R705
R792
4
3
2
R907
Q903
R909
R908
C509 C510
R811
R805
C908
C529
D551
B455
C515
C514
B456
R505
C518
D804
D802
D801
D805
D803
C528
R255
R561
R518
R564
C907
C508
IC501
B560
C520
C519
R253
B855
B457
R508
R506
R507
R252
IC901
R509
D903
Q902
C521
C253
1
AB C
2-5
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