Page 1
KD-S687
Block diagram
CJ1
ANT
5
SW1 SW4
REST
REST
SW
LOADING
MOTOR
4
FEED
REST
LOADING
LOADING
FEED
LOADING
SPINDLE
FEED
TRACKING
FOCUS
CN501
LM0
LM1
IC561
SERVO
CD
DRIVER
MOTOR
SPINDLE
SPINDLE
MOTOR
SW1 SW4
PICK UP
3
IC601 S619
KEY
SW1 SW4
A,B,C D,E,F
LD.MD
TRACKING
FOCUS
IC602
REMOCON
JS690
ENCODER
VA,VB,VC
VE,VF,MD,LD
IC501
RF AMP
MATRIX
ENC1
ENC2
2
REMOCON
KEY0,KEY1,KEY2
CJ601
CJ961
FEED
DMO,FMO,FOD,TRO
RF-GC,RF
RFRP,TE
SEL,TEB
RFDC,TE
CD-RW
IC571
CD
LPF
LO
RO
IC151
DSP
&
DAC
CD. L
CD. R
BUS0 BUS3
BUCK,CCE
RST,CDON
CD.L
CD.R
REMOCON
ENC1
ENC2
LCD.CL
LCD.CE
LCD.DA
KEY0
KEY1
KEY2
AMEO
FMEO
TU1
FM/AM
TUNER
FM/AM
FMOSC
IFC
AGC
S.METER
SD/ST ,MONO
S.METER
IC701
MICON
SI
SC
TU.LCH
TU.RCH
ANT
CDON
PS2
IC161
E.VOL
IC901
REGULATOR
EACH BLOCK
LRO
RRO
LFO
LRO
RFO
RRO
IC302
POWER
AMP
CN901
SPK
BATTERY
CJ302
LINE OUT
LF
RF
LR
RR
LCD1
COM1
COM2
COM3
S1
S50
IC601
LCD
DRIVER
LCD_CO
LCD_CLK
LCD_SO
1
AB CD E F G
2-1
Page 2
Standard schematic diagrams
Main amp section
CJ1
QNB0100-002
5
C41
R42
R43
1k
3.9k
0.056
C42
0.012
Q41
2SC3661-X
R41
1k
4
9V
3.3V
FEED+
FEED-
LM0
LM1
REST
SW1
SW2
SW3
SW4
CD.L
A-GND
CD.R
BUS0
BUS1
3
2
BUS2
BUS3
BUCK
CCE
RST
SW5V
CDON
CD-RW
CD8V
DETACH
ILL_10V
R5V
REMOCON
ENC1
ENC2
LCD.CL
LCD.DA
LCD.CE
KEY0
KEY1
KEY2
CJ691
VMC0334-001
D701
D702
D703
D704
D705
D706
D707
D708
D709
1000p
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
UDZS6.2B-X
C710
C711
0.1
1
Q42
2SC3661-X
C31
2.2/50
R32
R33
1k
0.001
Q32
2SD601
AMEO
FMEO
ANT
TELMUTE
BZ841
R841
10k
DETACH
R747
MONO
SEEK/STP
FM/AM
JBUS.INT
JBUS.SI
JBUS.SO
JBUS.SCK
JBUS.I/O
QAN0009-001Z
2.2k
UN2211-X
C32
Q31
1.5k
2SD601
R31
KD-S687KD-S687
Q976
47/6.3
C976
C705
220/10
C709
0.1
C706
C702
C701
0.01
C801
22p
22p
0.1
100k
R811
R803
UN2111
R332R331
R308
27k
R198
R188
1001k
C331
100P
C321
27k
R196
27k
R186
100
100
100
220p
C194
220p
C184
IC901
HA13164A
C906
2.2/50
27k
R195
27k
R185
R305
47k
R307
4.7k
220p
C193
220p
C183
100P
C351
100P
C341
100P
C313
100p
C314
100p
C315
100p
C316
100p
C320
22/16
C319
C306
100p
C305
100p
C304
100p
C303
100p
C317
0.022
C318
100/16
C300
0.022
C902
C901
2200/16
D901
1N5401-F64
QQR0703-001
L901
R901
1k( 1/4W)
CJ321
CJ322
R909
1k
R815
CH.LCH
10k
D907
CRS03-W
D908
CRS03-W
MUTE
1SS133
D301
QNZ0095-001
QNZ0002-001
RF+
RR+
LR+
LF+
RFRR-
LR-
LF-
TEL
CN901
QAM0254-001
R813
47k
R812
47k
1k
R814
CH.RCH
LR-
LF-
LR+
LF+
IC302
LA4743K
0.1
C361
0.1
C362
47/16
0.1
C363
0.1
C364
R316
47k
R306
470
4.7/25
Q301
UN2211-X
RF-
RR-
RF+
C308
C309
RR+
4.7/25
C915
10/16
0.01
D906
CRS03-W
R907
2.2k( 1/8W)
R908
2.2k( 1/8W)
C914
0.1
D905
CRS03-W
R322
R352
R342
C196
1/50
C195
1/50
27k
R197
27k
27k
R187
C185
1/50
1/50
C186
1k
R902
9.1k
Q977
4.7u
L702
UDZ11B-X
D977
R810
R802
C162
470p
CD.L
TU.LCH
CH.LCH
CD.R
TU.RCH
CH.RCH
SI
SC
ANT
CD8V
ILL-10V
10k
100k
R801
56k
R244
R5V
POWER
CDON
PS2
C977
330
100/16
R162
6.8k
C163
0.1
C244
100k
C171
10/16
R804
R805
R171
220k
R161
220k
C587
10/16
C802
10/16
R175
R176
R245
D242
1SS133
0.22/50
UN2111
10047k
10/16
C803
10/16
12k
C597
C243
D243
C173
C172
470p
C161
R172
6.8k
0.1
10/16
R808
2.2k
2.2k
0.047
1SS133
22k
R906
R905
R241
Q241
2SD601
22/16
C242
R242
R246
180k
R248
100
1k
1.2k
C211
0.01
R243
1k
R806
47k
R807
100
HD74HC126FP
IC801
C212
0.1
220k
220k
D244 D245
1SS133
22k
R249
R247
C245
1/50
C213
1SS133
47k
0.0047
C214
UN2211
1M
R211
470p
C174
IC161
BD3860K
47/16
C178
R961
51k
Q964
4.7/25
10/16
C215
R221
R201
0R0
0.082
C975
R809
0
LFO
MUTE
D331
1SS133
D341
1SS133
1M
4.7/25
0.1
C202
C205
0.01
C201
C180
B962
0
2SB709
Q963
C216
100/16
RFO
LRO
RRO
TELMUTE
TEL
0.1
C181
C182
C179
C905
220/10
C891
0.01
R968
0.1
R335
R325
R321
R351
R355
R345
R341
R892
2.2k
A-GNDA-GNDA-GND
C164
10/16
C166
C167
C176
C177
C191
C192
2.2/25
2.2/25
UDZS10B-X
D101
C909
10k
220/10
27k
C908
R967
D903
R891
0.22
0.22
2.2/25
2.2/25
220/10
0.01
10k
R192R182
10/16
C907
C204
0.22
0.22
C913
C175
0.0047
10k
10k
2.2k
2.2k
1k
1k
2.2k
2.2k
1k
C203
0.0047
470p
R191
R181
1SS133
22/16
C904
C165
0.0047
R163
3.3k
R173
3.3k
10k
10k
C903
47/16
R893
47k
Q891
UN2211-X
10/16
Q331
2SD1048/6-7/-X
Q321
2SD1048/6-7/-X
Q351
2SD1048/6-7/-X
Q341
2SD1048/6-7/-X
LFO
RFO
LRO
C910
R903
RRO
R194
27k
R193
27k
R183
27k
R184
27k
4.7k
Tuner signal
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
CD signal
Front signal
Rear signal
D976
1SS133
TU1
QAU0257-001
L1
4.7u
1k
R3
1k
R1
10k
10k
R701
R702
R703
0.1/50
R10
10/16
C21
R23
R842
10k
47k
47k
1k
D22
1SS133
UN2211-X
Q23
C35
47p
R749
4.7k
4.7k
4.7k
R704
R710
R711
R712
R713
R686
R685
BUZZER
Q21
2SB1197
PS2
0
10k
R746
C912
R22
1k
Q2
UN2211-X
RST
47k
47k
47k
47k
47k
47k
47k
BUS3
4.7/25
150p
R21
FM/AM
BUS2
10k
15
R25
9V
BUS1
1SS133
D2C1C18
BUS0
15
R26
1SS133
D1
CCE
SI
10/16
BUCK
SC
LM1
2.2k
R745
0.1/50
C3
220/16
C24
LM0
CD-RW
LM1
2.2k
R744
IC701
UPD178078GF-559
2.2k
2.2k
R708
R707
R706
LCD.CL
LCD.DA
LM0
0
2.2k
R709
LCD.CE
47
R2
FM.OSC
SW3
SW2
15p
0.22/50
C2
C16
R9
0.01
C85
R8
R5V
R739
SW4
REST
10k
47k
0.01
0.033
0.033
R4
R5
C83
C84
C14
8.2k
22k
S.METER
BUZZER
47k
10k
10k
R714
R715
ENC1
ENC2
FEED+
IF.C
SEEK/STP
MUTE.CONT
CDON
POWER
FEED-
SD/ST
R721
R719
R717
S.METER
D971
ISS355
D972
ISS355
Q1
UN2211-X
SW1
REMOCON
10k
R735
MONO
10k
10k
10k
KEY0
0.1/50
C12
C17
4.3k
56p
R723
R83
VDD
R724
KEY1
KEY2
2.7k
R81
1/50
C81
TU.LCH
R722
R720
R718
R971
47k
2.7k
R82
1/50
C82
R731
R729
R727
47k
47k
TU.RCH
VPP
R726
4.7k
4.7k
4.7k
4.3k
R84
47k
5p
10
0.022
C5
C22
R27
Q22
2SB709
D21
1SS133
R34
470
D31
C33
Q841
220/10
MTZJ10C-T1
10k
VDD
VSS
R748
ILL_10V
R750
R976
C841
R24
2.2k
MUTE.CONT
JBUS.INT
JBUS.SCK
JBUS.I/O
JBUS.SO
JBUS.SI
C333
0.047
R734
100k
RESET
R733
47k
R732
10k
0.01
C708
C707
R728
X1
X701
QAX0406-001Z
C703
R725
47k
9V
Q971
2SD601
10k
220/10
47k
0.1
L701
4.7u
FMEO
AMEO
FM.OSC
IF.C
47k
0
SD/ST
0
R716
VDD
2-2
HAB C DE FG
Page 3
CD servo control section
KD-S687
RF
Q501
2SB1241
3.3V
FOCUS+
FOCUS-
TRACKING-
TRACKING+
C509
100/10
TP1
RFRP
R510
C510C511
47k
0.1
SEL
TEB
100/10
C505
22
R507
R508
22
6.8k
R564
R563
R562
Q561
2SB1322
R561
C562
0.01
C508
0.01
FE
R516
R509
820
82k
RFDC
DMO
5.6k
FMO
6.8k
FOO
C561
47/6.3
D561
DSK10C-T1
10k
TRO
C563
22/10
C555
120p
47u
47u
0.1
C547
100/10
C548
0.01
C549
BUCK
BUS0
CCE
BUS1
BUS2
RST
4.7k
4.7k
BUS3
C551
100/10
C552
R538
10k
0.01
R535
R534
CDON
R517
TP2
Q521
UN2111
L522
47u
Q522
UN2211
L521
L523
4.7k
4.7k
R536
R537
47k
CD-RW
C507
0.0068
TE
SW5V
C546
C550
R574
150
C574
820p
C584
820p
R584
R581
15k
150
C553
C545
100/10
100p
C544
0.01
10p
C554
10p
R533
1M
X521
QAX0413-001Z
1/50
L524
R571
15k
0.01
C541
C572
4.7/25
C571
820p
C581
820p
R593
22k
C582
4.7/25
FMO
DMO
100/10
C539
100
100
R531
R532
47u
C521
0.01
R594
C540
R591
22k
22k
22k
C592
R592
47/6.3
FOO
R527
100/10
47/6.3
0.047
C538
0.047
C537
470p
C534
470p
C533
0
R530
0
R529
0
R526
100
IC521
TC9490FA
C530
C524
0.015
R539
2.2M
R521
5.6k
C593
TRO
0.01
100
R528
C522
C527
C526
C525
R583
12k
0.033
R525
10k
R524
R523
470k
33k
R572
C573
12k
R573
120p
C583
120p
R582
33k
C591
100/10
0.047
0.047
0.047
C531
C535
C536
!
C528
0.033
0.01
0.0027
0.01
33k
R522
47k
C523
47p
R575
IC571
NJM4565M-WE
R585
C594
0.001
RFGC
RFDC
RFRP
10k
CD.L
10k
CD.R
9V
SEL
TEB
9V
3.3V
FEED+
FEED-
TE
FE
RF
LM1
LM0
REST
SW1
SW2
SW3
SW4
CD.L
A-GND
CD.R
BUS0
BUS1
BUS2
BUS3
BUCK
CCE
RST
SW5V
CDON
CD-RW
CD8V
LM0
LM1
5
R514
C502
8.2k( 1/10W)
C512
R513
1k
82p
R512 R511
27k
2k 10k
IC501
TA2147F
82k
82k
82k
82k
150k
150k
C503
0.01
100/10
CN501
QGB2027M1-26S
LD
SW4
VD
SW3
VB
SW1
VC
SW2
VA
MD
LOADING-
VREF
LOADING+
VE
4
3
VCC
VF
FOCUS+
TRACKING-
TRACKING+
FOCUS-
FEED+
REST
SPINDLE+
FEED-
SPINDLE-
VREF
VD
VC
VA
VB
VE
VF
C513
0.01
C501
0.01
R503
R504
R505
R501
R502
R506
R566
IC561
LA6574H
C514
5p
!
LOADING-
LOADING+
R515
100
C504
0.01
R565
20k( 1/10W)
SPINDLE-
SPINDLE+
0.1
LD
FEED-
RFGC
FEED+
MD
2
1
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
AB CD E F G
CD signal
2-3
Page 4
KD-S687KD-S687
LCD & key control section
5
IC602
RPM6938-SV4
D646
R661
UDZS6.2B-X
10k
C682
0.022
4
LCD1
S603S604
S610
R601
R602R603R604
1.8k
1.2k1.8k2.7k
S602
R614 R613R615R616
1.2k 8201.8k2.7k
R605
3.9k
S606
S605
R610 R609 R608
S613
R611
S611S612
S619
3
S1
S2S3S4
Key0
S601
R606R607
Key1
8208203.9k 2.7k 1.8k 1.2k
S608S609
S607
R612
Key2
820
S614S615S616S617S618
S9
S7
S8
S5
S6
S10
S11
S12
S14
S16
S17
S19
R646
S20
S15
S18
D603
D604
D605
R645
R644
R643
820
R647
S13
D601
D602
820
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
S39
S42
S43
S44
R636
S45
S40
S41
S46
S47
S48
S49
S50
COM2
COM1
COM3
BUS2
BUS1
IC601
D641
PT6523LQ
C601
0.022
C602
680p
R635
D620
D621
D619
R634
R633
D622
D623
D624
R632
D625
R631
R659
D644
R660
390( 1/8W)
D645
390( 1/8W)
10/6.3
LCD_CO
LCD_CLK
LCD_SO
C603
R651
2.2k
R652
2.2k
R653
R654
R655
R656
D642
D643
R658
UDZS5.1B-X
10k
10k
10k
10k
1SS335-X
1SS335-X
180k
S22
S23
S21
S24
S25
D616
D606
D607
D608
R642
R641
D609
D610
D611
510
510
510
R639
R640
D613
D614
D615
510
R638
R648
D618
R649
D617
R637
R657
51k
S50
COM1
COM2
COM3
OSC
CE
CLK
DATA
C611
0.012
S46
S47
S48
S3S4S5S6S7S8S9
C612
R662
470
4.7/6.3
S35
S36
S37
S38
S39
S40
S41
S42
S43
S44
S45
S10S2S11S1S12
S13
S14
JS690
QSW0793-001
100
R681
C681
0.022
VCM0335-001
CJ601
ILL_10V
R5V
REMOCON
ENC1
ENC2
LCD.CL
LCD.DA
LCD.CE
KEY0
KEY1
BUS3
BUS4
KEY2
GND
S34
S32S49
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S15
S16 S33
2
1
2-4
HAB C DE FG
Page 5
KD-S687
Printed circuit boards
Main board(Forward side)
C573
C571
C803
C242
C587
C581
C178
C182
IC571
C582
C913
C181
IC901
C802
C192
C244
D903
C909
C583
R802
C904
D243
D242
C591
C592
Q321
R325
Q331
R331
D331
D341
C31
D21
D22
R41
R31
C2
L701
CJ322
C903
C908
R961
B962
C180
IC701
R704
R722
R720
IC801
Q341
CJ321
R335
D31
C21
L702
C81
R727
R718
R685
Q351
R341
R355
CJ1
R345
D2
D1
L1
C3
C33
C1
C82
C707
TU1
C701
C12
X701
R686
C24
CJ691
C912
C841
C505
IC302
C503
C320
C901
CN901
C305
C316
C914
C308
R909
B301
R186
C309
Q501
D908
C319
C184
D906
C318
D905
C313
IC501
C186
BZ841
R195
CN501
C509
C183
C315
C193
R907
R908
R196
R185
R307
C513
C195
R305
C314
C514
C185
C306
R308
R306
C561
C194
IC521
D907
R184
C522
R188
Q561
C196
R316
R183
C539
R187
C304
C976
D301
C977
C303
IC561
R198
D901
R901
R197
R193
R194
D976
C215
C174
C161
L524
R533
X521
R584
C205
C214
R171
C551
C548
C171
C213
C584
C550
C545
R581
C910
R221
D245
C563
D244
C164
C172
C173
R574
C906
C915
C593
L521
D561
L901
R902
R903
C905
C204
C191
C203
IC161
R161
C162
C597
L522
C572
C245
R571
C574
L523
5
4
3
2
Front board(Foward side)
D622
R609
R655
R638
S616
S618
D620
R639
R633
D624
R616
S612
D623
S619
R632
S613
R634
R635
R610
D625
S601
D605
D604
D603
D608
D606
S608
1
2-5
JS690
GEB10018A
S607
R644R645
D607
S609
IC602
AB C
S1B
D601
D602
LCD1
D609
S602
R601
D610
S603
R602
D611
S604
R603
D613
S605
R604
D614
S606
R605
D615
S614
S610
D616
R608
S611
D617
D619
D644
S617
D621
D645
D618
S615
Page 6
Main board(Reverse side)
KD-S687
CJ1
C351
R352
C341
C333
5
D1
D2
TU1
L1
R728
D702
Q41
C3
R3
C42
R42
R43
R83
R84
R5
C14
R33
C33
C21
R27
R2
C1
C81
R81
R82
C82
RESET
C707
R9
C701
X1
C702
R8
X701
C12
C710
D701
D704
D703
D705
D706
C5
C18
C22
C16
Q2
4
C83
C84
R10
C85
R4
Q1
3
C24
R32
R725
R731
R729
C321
C331
CJ321
R342
R332
R351
D331
D341
Q42
C35
D31
Q23
C41
C32
C31
C2
R24
C17
R1
C711
L701
L702
C709
LM0
R734
R733
R739
R747
C708
C703
R732
C706
R710
R712
VPP
R726
R716
C705
R724
R723
R735
R714
R715
R706
R707
R322
R321
CJ322
R812
R814
R711
C904
C903
C907
R815
C908
Q22
R21
R23
D21
D22
R744
VSS
VDD
D242
R703
R809
R811
R721
D707
D708
D709
D101
Q964
R749
C180
Q963
R701
C181
C592
R803
R592
R181
R591
R708
R968
C244
C179
R807
D243
R805
C176
R804
C909
C591
R808
C243
C177
R173
C165
C175
C182
R245
R967
R192
C178
C802
C582
R244
R247
R806
R813
R25
R34
R26
Q21
Q31
Q32
R22
R906
R905
R976
LM1
R745
R746
R713
R750
R748
R717
R719
R709
R182
R585
R582
R583
R702
D903
C587
C192
R810
R175
R249
C242
R801
C905
C801
R176
R572
R573
C191
C803
C572
R246
C913
R243
R248
Q241
C547
IC901
Q971
C245
R575
R594
C550
R191
R971
C597
R593
C915
L901
R972
R172
Q521
D901
C906
R901
C211
R535
C555
C201
C216
C212
C562
C164
C171
C166
C549
R891
R892
R163
C167
C205
C215
R211
C174
C161
R242
D245
C563
C551
L522
R538
C538
C534
C552
R534
C548
C545
C910
C202
C163
R162
R241
D244
D561
Q522
C594
C593
R537
R536
L521
L523
C544
C546
CN901
C891
C196
Q891
R893
D976
C976
R201
C975
R565
L524
R528
R532
C553
X521
C521
R531
R566
R564
R527
R529
R563
C522
Q561
C554
D301
D977
R562
C537
R530
R523
C539
R561
C977
R526
C561
R521
R522
C533
C531
C195
R515
C511
C541
D971
R517
C185
Q976
C512
Q977
R513
C540
D972
C536
Q301
R510
C318
C300
C509
R525
C535
C186
TP1
C317
C507
R511
C901
C902
C308
C361
C320
C362
IC302
B301
C309
C319
C363
C364
R506
R501
R502
R504
R503
R505
C501
C503
C502
R514
R512
C505
C510
R516
TP2
C508
C523
R539
C527
C525
C526
C530
C528
BZ841
R524
C524
C504
R841
Q501
R509
R508
R507
R842
C912
C841
Q841
2
Front board(Reverse side)
R658
C603
R614
R653
1
R612
R611
R615
D643
D642
D641
D644
C602
R613
R648
R660
R649
R659
R657
R637
R636
R654
D645
R656
CJ601
1
15
1
T1C
C601
R651
R652
R661
R641
R640
D646
R607
R647
IC602
AB C
R646
C611
C612
R606
R662
C681
R631
R681
C682
R642
R643
2-6
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