KS-FX742R
SCHEMATIC DIAGRAMS
CASSETTE RECEIVER
KS-FX742R
CD-ROM No.SML200303
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
2-1
2-2
2-5,6
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
Area Suffix
E ---- Continental Europe
EX -------- Central Europe
No.49816SCH
2003/03
KS-FX742R
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.
2-4
Block diagram
5
KS-FX742R
SUB
MOTOR
SWITCH
TAPE END.STANDBY
MAIN
MOTOR
HEAD
CN403
4
TO CD CHANGER
J801 CP901
SCK
SI/SO
3
IC801
JVC BUS
CH.L
CH.R
JBUSSI
JBUSSO
JBUSIO
2
J1
AM
FM
JBUSSCK
TU1
AM/FM TUNER PACK
Main amp section
SEEK/STOP
SD/ST
SM,FMEO
AMEO,FM/AM
MONO,FMOSC
AFCK,SK/ST
TO SPEAKER
CONNECTOR TO REAR LINE OUT
J321
L/R F
L/R R
LRO
RRO
IC301
POWER AMP.
OUTLR
OUTRR
OUTLF
OUTRF
IC161
E.VOLUME
TU.L
TU.R
TAPE.L
TAPE.R
IC701
MAIN SYSTEM CONTROL CPU
F/R
MODE
STANDBY
FF/REW
MOTOR
SUBMO
SUBMO
TAPEIN
DOLBY
MS
REEL
KEY 0 – 2
+
-
CN401
CP401
CJ601
CP701
MOTOR
TAPEIN
MODE
STANDBY
PHOTO
REEL
F/R
MSOUT
LCH
RCH
FF/REW
SUBMO+
SUBMO-
CLOCK
CN402
SUBMO+
SUBMO-
DC MOTOR DRIVER
COM0 – COM3
IC651
LCD DRIVER
KEY
– S619
S601
LCD & Key control section
FWD-L
FWD-R
REW-L
REW-R
IC401
PB EQ
IC402
Head amp section
LCD1
S3 – S52
1
AB CD E F G
2-1
Standard schematic diagrams
Main amp section
TU1
C32
0.12
Q32
Q701
2SC2412K/R/-X
R703
D705
UDZS6.2B-X
10V
10k
0
0
D707
D706
UDZS6.2B-X
UDZS6.2B-X
J801
QNZ0095-001
1k
R31
DETACH
0
REMOCON
QAU0292-001
QNB0100-002
2SC2412K/R/-X
2SC2412K/R/-X
STANDBY
TAPEIN
MODE
SUBMO+
SUBMO-
REEL
MS
DOLBY
F/R
FF/REW
MOTOR
KEY0
KEY1
KEY2
ACC5V
LCDCE
LCDCK
LCDDA
ENC1
ENC2
C710
0.1
J1
L1
4.7u
D5
D6
1SS355-X
1SS355-X
C33
C43
150P
1k
R34
R44
R43
10k
R42
1k
C41
0.001
Q42
Q41
SW5V
C717
0.047
0.47/50
1k
C34
C42
2.2/50
47u
L2
C802
120p
0.1
Q33
UN2211-X
2SA1037AK/RS/-X
R2
C77
C76
C75
47p
82p
QAX0263-001Z
47K
4.7k 47k
Q1
UN2211-X
C1
100/16
D1
R1
33
MTZJ9.1C-T2
10V
FM/AM
47/16
0.01
R73
2.2k
X71
R72
2.2k
R58
R59
470
2SC2412K/R/-X
C55
0.47/50
R750
R807
100k
R808
100k
R809
100
330k
R810
HD74HC126FP-X
47p
1.5k
R41
AMEO
9V FMEO
C74
C803
5
R33
1k
R32
3.3k
C31
2SC3661-X
R748
2SC3661-X
Q31
68k
R706
R701
R702
0.012
4
3
To
Head amp
section CN401
CP401
QGB1214J1-18S
To
LCD & Key control
section CP701
2
CJ601
VMC0334-001
D702
D701
UDZS6.2B-X
UDZS6.2B-X
D703
D704
UDZS6.2B-X
UDZS6.2B-X
1
C2
15k
Q52 C54
R806
IC801
Q2
R3
R57
47p
UN2211-X
10k
KS-FX742R
C5
1/50
10k
1/50
SD/ST
RDSDA
JBUSSCK
UN2211-X
RDSCK
47p
C8
UN2111-X
SM
FMOSC
C6
0.1/50
Q8
0.015
0.015
C81
C82
2SC2412K/R/-X
Q4
UN2111-X
Q5
D4
1SS355-X
AFCK
LCDCK
LCDDA
LCDCE
DETACH
R754
ENC1
ENC2
GND
C718
C704
KEY0
KEY1
KEY2
ACC5V
R12
68
220/10
C9
0.047
2SA1037AK/RS/-X
C3
D7
1SS355-X
R4
3.3k
R14
10k
Q12
C72
560P
R71
IC71
SAA6579T-X
R55
10k
0.1
C53
10k
0.0047
R56
2.2k
R803
100
C801
10p
C85
Q3
D3
D2
C73
2.2/50
2.2k
Q51
2SC2412K/R/-X
0.047
R53
1SS355-X
1SS355-X
0.022
C71
47k
R54
R805
22k
R11
Q9
R5
47k
SM
SEEK/STOP
9V
MONO
0.01
C78
REMOCON
TAPE.L
TAPE.R
47k
C52
0.01
330P
R60
47k
C51
UN2211-X
Q53
CH.L
CH.R
JBUSSI
JBUSSO
JBUSIO
100k
22k
R804R802
330k
100k
R801
R81
10k
R82
C7
Q7
Q6
2SC2412K/R/-X
2SC2412K/R/-X
15k
R83
R8
4.7k
4.7k
R9
UN2111-X
Q10
C4
0.1
390P
C87
SK/ST
MUTE
47k
R740
R741
47k
47k
47k
R753
47k
R755
R764
4.7k
R763
4.7k
47k
R756
VDD
4.7k
330p
R728
100/6.3
4.7k
R727
4.7k
R726
0.0012
4.7k
C83
R10
15k
R84
C84
0.0012
R15
0
TU.R
TU.L
R162
1/50
0
TAPE.L
TAPE.R
TU.R
CH.R
TELMUTE
R718
R719
R722
R721
C164
0
R164
0
R163
R161
C163
0
1/50
1/50
C162
C161
2.2/50
0
R709
ANT
10k
10k
R720
10k
10k
10k
10k
C709
R731
0.1
TAPEIN
STANDBY
C165
1/50
TU.L
CH.L
C167
47k
22k
47k
R761
R762
R765
47k
R732
TX
RX
IC701
uPD178078GF-596
4.7k
4.7k
4.7k
4.7k
R716
R715
R714
R717
JBUSIO
JBUSSI
JBUSSO
JBUSSCK
MODE
SUBMO+
R168
2.2k
22k
R167
C166
2.2/50
C172
C173
0.0082
C171
0.22
C169
C170
0.0082
C168
47/16
100/16
4.7k
R724
R725
4.7k
4.7k
R723
MS
DOLBY
SUBMO-
REEL
0.18
22k
R165
R166
2.2k
AFCK
FM/AM
47k
R733
47k
R737
47k
R736
56k
R742
47k
R735
47k
R745
47k
R743
47k
R746
47k
R734
R747
47k
47k
R738
FF/REW
F/R
MOTOR
0.18
C176
C174
0.033
0.22
C175
0.033
R169
220k
220k
R170
MONO
RDSCK
RDSDA
KS-FX742R
C181
C179
0.082
1SS355-X
1SS355-X
R713
3.3k
0.22
C244
UDZS5.1B-X
R711
R729
R760
10k
0.1
3.3k
47k
47k
VPP
C701
0.001
C705
0.1
C708
R758
C180
100/16
SD/ST
C719
0.01
10k
R749
FMEO
AMEO
R759
47k
FMOSC
SEEK/STOP
C707
QAX0406-002Z
C706
PCNT
POWER
R757
D242
RB160M-30-X
68k
R247
C183
270
R173
R172
C184
C182
10
R171
9V
POWER
R976
47k
SK/ST
22p
X701
33p
R707
SCL
SDA
4.7k
LMETER
C243
0.047
D241
1SS355-X
22/16
C178
0.0056
C177
0.0056
D161
D162
RESET
R248
220
D243
2.2/50
2.2/50
IC161
TEA6320T-X
Q976
UN2211-X
100k
ACC5V
ANT
9V
10V
PCNT
SW5V
0.001
C713
4.7k
Q241
270
2.2/50
2.2/50
C702
0.1
220/10
R708
R243
2SD601A/R/-X
C242
C703
330P
C714
12k
R245
R246
47
1k
2SA1037AK/RS/-X
L902
TELMUTE
R242
R244
IC301
LA4743K
22/16
RB160M-30-X
RB160M-30-X
47/16
C302
C327
0.1
4.7/50
C307
C305
L901
D904
QQR0703-001
0.22
2.2
C913
10k
R912
C910
0.047
C904
2200/16
C903
1N5401-F64
D901
150P
0.1
C306
0.047
C902
F1
QMFZ047-150-T
RLOUT+
C911
C901
10/16
R901
47
FLOUT+
FROUT+
RROUT+
C323
0.1
C324
0.1
C325
0.1
C326
0.1
FLOUT-
RLOUT-
FROUT-
RROUT-
TELMUTE
GND
ACC
MEMORY
REMOTE
CP901
QNZ0112-001
QAM0175-002
TUNER SIGNAL
J321
QNN0519-001
R301
27k
RR
RL
R351
R331
R352
R342
100
100
1k
FR
FL
FL
RL
R307R6R308
SDA
47k1247k
PCNT
SCL
9V
RR
FR
MUTE
LMETER
27k
R977
12k
R978
Q977
2SA1855/RST/-T
47u
47u
L903
X1
Q891
UN2211-X
D353
1SS355-X
R353
2.2k
1SS355-X
R306
R309
47k
47k
C783
0.1
IC901
HA13164A
Q902
UN2211-X
R891
R892
47k
D891
C891
1SS355-X
R333
D333
2.2k
2SD1781K/QR/-X
R782
47k
D902
1SS355-X
47k
R907
1k
R906
Q901
1k
1SS355-X
D892
0.1
R905
10k
C909
2200/6.3
1k
1k
R332
Q351
2SD1781K/QR/-X
Q331
R781
2.7k
UN2211-X
Q784
D782
1SS355-X
D783
1SS355-X
0.1/50
18k
4.7k
1/50
220/10
C908
R903
C905
R904
C907
C308
0.22
0.22
R302
C309
27k
27k
R311
C318
0.22
0.22
R312
1k
R322
4.7k
1SS355-X
1SS355-X
27k
D343
D323
D781
MTZJ11C-T1
R910
2SD1781K/QR/-X
100/16
C906
C319
R343
2.2k
R323
2.2k
100/16
C781
220/10
C982
10/16
390p
390p
C303
C304
390p
390p
C313
C314
Q781
UN2111-X
UN2111-X
C782
RB160M-30-X
D982
C321
0.01
C322
150p
100
100
1k
C301
4.7/16
R305
R341
R321
Q341
2SD1781K/QR/-X
Q321
D903
Q782
C912
100/10
10k
R902
R981
R982
RB160M-30-X
0.1
C981
D981
TAPE SIGNAL
FRONT SIGNAL
REAR SIGNAL
180k
C241
1/50
47k
R241
22k
CD CHANGER SIGNAL
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
2-2
HAB C DE FG
KS-FX742R
LCD & Key control section
5
To
Main amp section
CJ601
LCDCE
ACC5V
KEY2
KEY1
KEY0
VMC0335-001
CP701
4
LCDDA
LCDCK
10V
REMOCON
LCD1
QLD0251-001
S3S4S5S6S7S8S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
S39
S40
S41
S42
S43
S44
S45
S46
S47
S48
S49
S50
S51
S52
COM1
COM2
COM3
S39
S43
S42
S41
S40
3
R659
2.2k
10k
R655
10k
R656
10k
R654
2.2k
R660
D655
MA152WK-X
D654
MA152WK-X
MA152WA-X
D653
R653
180K
D652
MA152WA-X
UDZS5.6B-X
C651
R652
10/6.3
C653
680p
0.022
D651
C652
10k
R661
47k
S49
S50
S51
S52
COM1
COM2
COM3
OSC
CLOCK
S46
S5
S4
S3
S6
S45
S48
S44
S47
S38
S37
S35
S34
S33
S36
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S8
S7
S13
S12
S11
S10
S9
S16
S15
S14
IC651
LC75823W
2
D613
R649
S601
S615
S608
R607
R613
820
R601
820
820
D657
10K
R657
MA3062
IC652
RPM6938-SV4
C654
4.7/6.3
47
R658
330
R630
D640
NSPW310BS/B2RS/
330
R631
D641
NSPW310BS/B2RS/
R637
D602
D603
D601
2.2k
R636
820
2.2k
R635
D619
D620
1k
1k
R648
R647
680
R646
D616
D617
D618
D614
D615
D610
680
390
390
R645
R644
R643
D607 D611
D609 D612
1.2k
390
390
R641
R642
R640
D608
D604D605
D606
1.2k
1k
1k
R638
R639
S616
S609
R608
R602
820
820
R614
820
S617
R603
1.2k
S603S602
R609
1.2k
S610
R615
1.2k
R604 R605
1.8k
S604
R610 R612R611
1.8k 3.9k2.7k
S611
R616
1.8k 2.7k
S618
S605
S612
S619
R617
2.7k
S613
S620
S606
S614
R618
3.9k
S621
1
AB CD E F G
2-3
Head amp section
KS-FX742R
KS-FX742R
5
680
CN403
QGF1219F1-10S
R410
Q403
2SB1322/RS/-T
1A3G-T1
D402
3.3k
R422
47k
R423
Q402
UN2211-x
4
100k
680p
680p
C401
C411
100k
R401
R412
100k
R402
680p
C412
680p
C402
R415
4.7k
R405
4.7k
R414
5.6k
R404
5.6k
C414
0.1
C404
0.1
C406
0.01
R406
47k
C403
0.18
R403
1M
IC401
HA12231FP-X
C416
1/50
R416
2.4k
Q406
UN2211-x
R408
680
C407
2.2/50
R407
10k
C405C408
1/50100/16
IC402
LB1641
C425
10/16
C423
0.01
0.1
C424
33
R425
C417
2.2/50
R417
10k
C415
0.01
D401
MA3047/H/-X
3.3k
R424
100k
R411
3
CN402
QGA2001C1-06
2
CN401
QGB1214K1-18S
To
Main amp section CP401
1
2-4
TAPE SIGNAL
HAB C DE FG
Printed circuit boards
Main board
5
J321
Q341
Q331
R341
R351
Q351
R353
R343
L1
R352
D353
C87
C1
D1
C3
Q31
Q32
Q53
Q52
R56
C53
R12
R713
C52
C86
C55
R33
D2
R3
C2
C9
C8
C85
C43
R82
B7
C6
C5
R60
Q8
C7
R57
Q51
R722
L2
R718
R727
R728
R719
R701
R750
R702
CJ601
D5
D6
4
3
Q33
Q3
C34
D3
R5
R34
C33
B4
Q12
C82
C81
B8
R14
B9
R11
C51
Q9
B10
2
R331
B322
D343
R322
C906
R1
R43
C31
Q41
Q42
C42
R4
D7
R41
Q2
R2
Q1
R6
Q5
R83
B720
B6
R8
Q4
C54
R53
R54
R58
R59
R55
D701
D702
D703
D704
C701
R703
R32
D4
B5
R333
R342
R31
Q321
D333
R332
C32
R84
R81
C321
B2
R42
R44
R711
R321
R323
D323
R726
C83
C322
B321
C41
R9
Q6
C84
R720
D705
Q7
C705
R746
R15
D706
B721
Q10
R10
C802
R734
D707
C706
GND
VDD
R709
C4
B722
X701
R743
R745
C702
J801
R735
B716
C708
R757
R758
C710
CP401
R714
R721
C707
R760
Q701
R742
B706
B714
R737
B705
R717
R715
R716
B710
R736
B701
B704
R749
R748
B703
B711
C718
R759
R910
B901
B702
R763
IC901
VPP
R733
B709
B707
R738
B719
R724
R747
R723
R762
B903
B906
B907
R707
R163
RX
R764
B708
R706
R904
TX
R732
B718
B717
C907
R708
C905
C982
C163
B712
R756
R755
RESET
R905
R906
B909
B715
IC701
R740
R741
B904
R164
C164
R754
R725
R729
B806
B905
R161
B713
R765
R903
R761
B805
R731
R902
Q901
R753
R806
R162
C166
IC161
C709
R907
C244
R247
C902
D902
D241
R808
C904
C908
B161
C161
C171
C169
R807
C165
R165
R809
B163
D242
D243
C162
R169
R248
B164
Q241
B910
Q902
C167
R803
C901
C704
D901
B912
IC801
R810
R167
C172
L901
R901
B162
D982
C173
D161
C913
B913
C174
R804
R168
R170
B802
R307
C176
B242
D981
C181
C183
C175
R802
R306
C178
C168
C242
C801
R981
R912
C912
C177
R982
C319
R245
C803
R805
C981
D903
R312
C72
R71
R801
D904
C303
R173
R302
R301
C179
C327
R166
R246
C71
C184
IC71
C910
B911
R172
C180
C170
C241
R243
C243
B243
B782
C182
B781
R242
R244
B801
R309
R241
R976
C76
C314
C309
C78
R308
C781
Q781
R171
D162
Q891
R311
Q976
C782
R782
C75
L902
CP901
R891
C318
R977
X71
C324
R892
B171
C307
KS-FX742R
C308
C313
C302
C326
R305
C783
B792
D781
D783
Q784
R781
L903
D892
B891
C909
C891
R978
C903
C73
R72
C77
C74
R73
C304
Q782
C703
C323
IC301
C301
D782
D891
Q977
C305
C325
C306
1
AB C
2-5
KS-FX742R
Front board
5
D601
S605
R605
S608
D618
D616
IC652
S604
R601
R604
D617
LCD1
S606
R607
D613
S609
D614 D615
R608
S601
D619
R603
S603
R602
S602
D620
4
Forward side
S610
R609
S611
D610
R610
S612
D611
S615
D612
R613
R614
R611
D609
S616
S613
D607
S617
R612
C653
R652
D608
D641
D604
S620
D605
S621
D606
R615
R617
R618
R616
S618
S619
S614
D602
D603
3
Reverse side
R642
D654
D653
R655
C652
D655
D652
C651
R656
D640
D641
R654
R631
R661
R643
R630
CP701
IC651
R657
D657
IC652
R635
R645
R644
R658
C654
R646
R648
R649
R647
D651
R638
R639
R660
R659
R653
R637
R636
2
R641
R640
1
2-6
AB CD
KS-FX742R
Mecha board
5
C415
C403
R403
B403
B414
B404
IC401
CN403
C417
R417
B412
B405
R423
R407
C404
C407
CN401
R404
R405
R402
R401
C401
C402
B411
R412
C412
R414 R415
C414
B402
C411
B401
R411
CN402
R422
Q402
C405
C424
B415
D402
Q406
R410
C408
R416
R406
C406
R408
Q403
B413
C416
B406
B416
R425
R424
IC402
C425
C423
4
D401
3
2
1
AB C
2-7
KS-FX742R
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.49816SCH)
Printed in Japan
2003/03
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