JVC KSFX-230 Service manual
SERVICE MANUAL
CASSETTE RECEIVER
KS-FX230
KS-FX230
KS-FX230
Area Suffix
/I
40WX4
ATT
SEL
Multi
Music
Scan
SSM
78 9101112
123456
CD CHANGER CONTROL
MO/RND SCAN/RPT
KS
-FX230
CD-CHTUNER TAPE
PROGBAND
SOUND
LOUD
DISP
UF ------------------ China
Contents
Safety precaution 1-2
Disassembly method 1-3
This service manual is printed on 100% recycled paper.
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
Adjustment method 1-9
Description of major ICs 1-12
No.49565
1-1
Jul. 2000
Block diagram
6
5
KS-FX230
4
3
2
1
BC
DE
F
G
HA
I
2-1
Standard schematic diagrams
Main amp. section
6
5
4
3
2
J1
CJ701
CP702
R774
1.5K
C772
R773
2.2/50
1K
C773
0.001
Q772
Q771
D712
D718
R719
3.3K
3.3K
R718
3.3K
R720
100
R717
100
R716
100
R715
D711
D704
MTZ6.2JCT-77
MTZ6.2JCT-77
LCD.SCK
C708
D705
D706
D707
D708
D709
0.015
MTZ6.2JCT-77
MTZ6.2JCT-77
MTZ6.2JCT-77
MTZ6.2JCT-77
MTZ6.2JCT-77
TAPE.14V
TAPEEND
LCD.SO
LCD.CE
KEY2
KEY1
KEY0
DETACH
TAPE.L
TAPE.R
MS.OUT
DOLBY
FF/REW
MOTOR
MODE
STDBY
TAPEIN
SUBMOSUBMO+
KICK
R771
R772
10K
C771
220/10
5V
10V
14V
R5V
F/R
9V
1K
1K
10K
47K
R764
C702
22P
C701
27P
VCX5026-001
EO
FM.OSC
AM.OSC
47K
R726
IF.C
KEY0
KEY1
C703
100/6.3
C704
0.22
KS-FX230
D990
Q972
C972
220/16
R756
100
10K
R759
R760
HD74HC126P
IC751
100330K
R751
R755
1K
47K
R753
R754
CD.RCH
TAPE.L
TAPE.R
C705
10/16
TAPE.14V
MEM.DET
R5V
5V
TUNER_9V
9V
Q783
14V
Q784
R786
R785
1K
ACC
Q989
C988
47/16
R757
47K
R758
47K
100
14V
CD.LCH
TU.LCH
TU.RCH
L782
47K
C132
C232
1/50
R63
20K
R541
D541
R545
C543
56K
0.47/50
47uH
C785
33/10
Q785
R790
2.7K
Q786
1/50
47/16
C934
ACC
MUTE
SCK
C150
1/50
C250
R164
100
R264
100
14V
1/50
1/50
C260
10
Q782
IC781
BA3918-V1
CJ921
C709
0.047
IC981
R151
RRO
LRO
SDA
SCL
1/50
3.3K
R721
C160
R722
3.3K
C932
0.01
C931
100/10
47K
R783
1K
R784
Q781
0.01
D785
C985
L981
C707
0.01
27K
470P
C162
R161
27K
R261
27K
470P
R251
27K
R988
10K
R989
100
R987
C981
2200/16
D981
1N5401TM
QQR0528-001
2.4K
C984
10/16
R152
82K
C152
470P
R162
82K
R262
82K
C262
C252
470P
R252
82K
LRO+
C986
10/16
C983
0.01
C971
4.7/25
C982
0.01
C951
4.7/25
RRO-
ACC
RFO+
RRO+
LRO+
LFO+
RFORROLROLFO-
HA13158
LRO-
LFO-
LFO+
MUTE
CD SIGNAL
FM/TUNER SIGNAL
AM SIGNAL
TAPE PB/MAIN SIGNAL (Front)
TAPE PB/MAIN SIGNAL (Rear)
D974
4.7K
R951
47K
R971
R972
Q971
470
RFO+
RRO+
RFO-
QNZ0002-001
CP981
R163
LRO
R131
22K
C134
TEA6320T
C234
R231
22K
C541
1/50
R542
22K
R795
R796
RRO
0.0082
0.0082
R543
R546
R133
47K
820
R165
2.2K
Q161
R265
2.2K
Q261
R263
820
SI/SO
CD.RCH
CD.LCH
R132
C138
0.0056
C137
0.15
C135
0.22
0.033
C136
C236
0.033
0.22
C237
0.15
C235
R232
R233
150K
10K
C783
2.2k 2.2k
12K
180K
150K
2200/6.3
C238
0.0056
R931
C784
220/10
D781
C781
C987
D784
10/16
10/16
D710
D161
D261
SCK
SI/SO
R54
20K
R53
7.5K
C133
1/50
IC931
1/50
C233
C933
100/10
R64
7.5K
C542
0.047
Q541
D542
100
R547
1K
R544
22/16
C544
Q987
10K
Q988
R990
6.8
R787
L781
47uH
Q789
R788
100K470K
R789
KS-FX230
QAU0058-001
TU1
L1
4.7uH
R1
10
1K
R2
1K
R3
D1
D2
R6
2.2K
FF/REW
PCNT5V
KICK
Q1Q3
R4
10K
D791
10K
1K
R5
R787
IFREQ
MONO
ACC
BAND
D701
D714
D715
6.8
TUNER_9V
EO
Q2
4.7K
D792
D771
R17
0.1/50
C6
*
0.01
C11
TAPEIN
C7
*
R14
R15
STDBY
1.5M
3.3M
TAPEEND
MODE
8.2K
0.1/50
100K
C8
R10
R11
R61
R51
*
*
1/50
1/50
Q5
S.METER
MONO
IC701
MS.OUT
F/R
SD/ST
C231
C131
R52
*
TU.RCH
TU.LCH
SDA
SCL
LCD.SO
LCD.CE
LCD.SCK
4.7K
47K
R724
R711
BUS.INT
BAND
DETACH
MUTE
0.01
C751
C706
5V
4.7K
3.3K
4.7K
IC790
C793 C792
0.1 0.33
R761
R763
R752
R762
1K
X701
D716
3.3K
3.3K
R714
R713
BUS.INT
BUS.SCK
R62
*
BUS.I/O
BUS.SO
BUS.SI
BUS.SO
BUS.SI
BUS.SCK
MUTE
MEM.DET
10V
S.METER
0.01
R710
R712
R709
KEY2
KIA7810PI
BUS.I/O
100
10/16
0.1/50
10/16
0.022
C1
C3
C2
14V
R727
47K
R725
R708
R702
R703
R704
R705
R706
R707
10K
C5
C4
R8
R9
IFREQ
FM.OSC
SD/ST
47K
47K
47K
47K
47K
47K
47K
47K
SUBMO+
SUBMO-
MOTOR
1
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
BC
DE
F
G
HA
I
2-2
KS-FX230
LCD & key switch section
6
D654
MA152WK-TX
MA152WA-TX
D653
LCD1
R653
150k
MA152WA-TX
D652
S10
S11
S12
S13
S14
S15
S16
S17
C651
R651
1.5k
R652
0.01
4.7/6.3
C653
680p
C652
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
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
S37
S33
S34
S35
S49
S50
S51
S52
COM1
COM2
COM3
47k
IC651
LC75823E
S36
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S10
S11
S12
S13
S14
S15
S16
COM3
COM1
S51
S52
COM2
5
CP701
VMC0335-001
4
D623
R628
R631
820
10K
10K
10K
D602
D603
820
D601
R655
R656
R654
MA152WK-TX
D655
3
820
D618
D619
D620
R636
820
R635
D614
D615
D616
R637
510 510
R640 R638
2
D621
D622
560
820
R634
D612 D611D613
D608
D609D610
D624
R633
R639
510
510
D605 D604
PL601
PL603
R601
270 820
S601 S602
R608 R609 R610
270 330 390
R615 R616 R617
270 330 390
S617 S618 S619 S620
R602
330
S610 S611 S612
S604 S605
R605R603 R604
560390 470
R611
470
R618 R619
470 560
R612 R613
560 820
S613S609
R606
S606
S614
R614 R600
820 1K
S622
S607
S615
R607
R620
1K
1K
S608
S616
S603
1
BC
DE
F
G
HA
I
2-3
Mecha control section
KS-FX230
KS-FX230
D501
DSK10C
C203
IC901
1/50
Q501
2SB1322( RS)
3.3K
R502
0.1
C204
18K
R907
47K
R501
Q502
DTC114EKA
R903
22K
C905
R904
1.2M
0.1
IC501
LB1641
CP502
6
C202
0.01
VR201
R203
33K
12K
R105 R205
R204
300K
180 180
5
CJ503
4
470P
C101
C201
100K
R201
470P
R101
100K
C205
C906
22/16
C105
100P
100P
5.1K
C103
R901
1/50
100
C902
R108
R109
100P
1.5K
C104
3.3K
C503
10/16
C501
0.01
C502
0.1
R505
33
12
R504
C904
0.01
R208
5.1K
3.9K
R902
0.1
C903
0.47/50
1.5K
R209
Q503
DTC114EKA
D503
MA3075( M)
D502
MA3036( L)
R503
2.2K
R506
3
C102
0.01
R104
300K
R103
VR101
12K
33K
C901
22/16
2
CJ501
TAPE PB/MAIN SIGNAL
1
BC
DE
2-4
F
G
HA
I
Printed circuit boards
Main board (Forward side) Main board (Reverse side)
KS-FX230
IC790
C983
C987
C982
C783
C972
IC981
B46
B104
B262
C792
R951
C986
B48
D784
C781
C981
B78
B131
R784
D981
C707
B108
R231R232
D713
D541
C260
R132
R131
C234
B94
C751
R727
R759
Q541
R757
C138
D701
R752
L981
B143
D931
Q931
C137
C135
R133
C136
C134
S04
C237
C238
R542
C542
C544
B25
B93
R761
B98
B41
B42
B43
R763
R233
C235
C236
C231
C933
C541
B186
B142
B141
B185
B135
B101
B111
R707
C701
C702
B44
X701
B54
B89
B49
R987
C984
B80
B109
B189
R971
D785
C985
Q781
B261
B251
B241
B232
B218
B217
B216
B215
B187
C152
B188
B144
C971
C951
B36
D990
B39
R989
C988
Q989
Q972
D710
Q783
D973
R786
Q784
Q782
B45
R783
D781
B252
R988
B235
B236
B234
CP981
C262
R251
R262
R252
R261
C162
B2
B33
Q161
R264
Q261
R163
Q971
R165
D974
D161
D261
D789
R788
B37
R785
B145
B35
R795
R796
R755
B40
R754
R764
B52
D718
IC781
C784
B102
B47
C793
R972
Q789
B27
C931
C150
C160
C252
B28
B146
B90B7B91
R931
C932
R263
C543
R762
C250
R546
R543
R541
B56
][
B95
B51
B53
L781
IC751
R756
D714
R545
D715
R547
D542
R751
R721
R722
R544
B100
R760
B30
R162
R152
R151
B31
R161
R164
R265
R789
B96
B97
Q987
R990
Q988
B38
R753
R758
R710
B55
CP751
B88
B147
CP702
B26
B86
B34
C232
B22
B82
B85
C934
B83
B184
C703
R706
R703
R705
B84
C704
C705
C133
R704
C131
B177
C132
C233
B23
R62
R61
B182
B137
B32
B219
B242
B110
B50
B176
B175
B174
B173
R51
R52
R54
R53
R63
R64
B214
R708
B21
R701
B16
R702
B231
B132
B15
R711
R726
D716
B183
B77
C708
D709
R719
B81
R787
B1
B172
B171
B212
B213
B71
B233
B179
B180
B19
B20
B17
R709
B181
B74
B73
B76
B140
B9
B99
B136
B139
C706
D708
R718
D707
R720
Q786
C264
CJ921
C772
R774
B3
B4
Q772
B10
Q1
C1
R4
R6
Q2
R5
D791
R17
B178
B138
B75
B14
C8
B134
B133
B6
B8
B18
R714
R725
Q785
R724
R716
R717
R790
L782
Q771
C709
R713
R715
D792
C164
D771
B13
C771
R771
R772
R773
C773
R2
R3
C2
C3
R1
B5
C4
Q3
C5
R8
R9
C6
C7
C11
R14
Q5
R15
R11
D704
R712
D705
D711
D706
B72
D712
CJ701
J1
B12
L1
D1 D2
R10
TU1
B11
B24
C785
FSMW1044
T04
J1
L1
D1 D2
R10
4
6
R4
R790
CJ701
CE
R5
B
L782
CLOCK
DATA
Q785
C706
R720
Q786
E
78
13
D707
R718
5V
10V[LAMP]
14V[LED]
CP751
1
CP702
TP201
TP101
R63
D709
C132
R54
R53
R64
R62
R701
R702
R703
R711
R726
D716
C708
R787
C705
R51
R52
R708
R709
D708
R719
151
GND
D981
C704
9
R544
R756
R541
IC751
R931
R546
C160
R721
R543
D542
D714
R722
R547
R545
R751
1
C931
C252
R262
R261
R162
R263
R164
R265
C543
Q987
E
L781
B
Q988
R754
R762
R753
R758
L981
C707
D931
18
C135
C136
16
R133
C131
C133
17
C233
C235
R233
C232
R61
R704
R705
C703
C231
R706
C236
C934
C541
R710
R707
C701
C702
X701
Q931
C933
C544
C237
R542
R132
R131
R759
R757
IC931
C542
C260
R231
C150
C138
1
C250
32
R232
C932
B
Q541
E
D541
R727
D713
D701
D715
1
C751
R752
14
R760
BE
C137
C134
C238
C234
R761
R763
CP981
C262
R251
C162
C152
R152
R151
R161
EB
R264
BE
Q261
R972
R163
E
Q971
D161
D974
R789
D261
E
D789
Q789
EB
R788
R785
R990
R795
R796
EB
R988
R755
R764
7
D718
8
C784
C793
R987
R252
Q161
C971
C951
R165
D990
Q989
EB
B
Q972
Q783
D973
B
BE
Q784
E
R783
Q782
IC781
112
C264
RRRL
C709
C771
C772
R771
EB
R3
C2
C1
C3
R1
C4
BE
C5
R8
D792
R9
C6
C7
R15
BE
Q5
R712
R713
D711
R715
DET
CJ921
Q771
D791
C8
R714
Q3
R725
R716
KEY0
R774
EB
Q772
EB
Q1
R6
BE
Q2
R17
R724
BE
R717
R5V
KEY2
KEY1
C164
D771
261
C773
R772
R773
R2
C11
TU1
R14
R11
D704
D705
C785
D706
D712
R786
D781
C984
8
C985
12
D710
R784
R989
R971
Q781
C781
C792
D785
C986
C981
BE
C972
R951
IC981
C987
C982
23
22
2
1
C983
D784
IC790
C783
6
5
4
3
2
1
BC
DE
F
G
HA
I
2-5
KS-FX230
KS-FX230
Swich board
Head amplifier board
Forward side
UP
DOWN
D604
PL601
PL602
S614
D605
D608
EJECT
D619
D601
S622
D602
R616
S619
S607
D616
LCD1
D615
S613
1
2
R612
R611
3
D613
D612
D614
S611
S612
R610
S610
R609
4
R608
5
D611
6
CD-CH
S609
D618
S620
MO
SCAN
PL603
TUNER
R615
S618
D603
S617
TAPE
SOUND
D620
S606
D621
LOUD
S605
PL604
D622
S603
DISP
6
D623
I/O
S601
S604
D624
S615
S602
SEL
S608
D609
S01
D610
S616
FSMW1043
5
4
Reverse side
3
2
1
BC
DE
2-6
F
G
HA
I
KS-FX230
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.
1-2
Disassembly method
Removing the front chassis (see Fig.1)
1. Disengage the four tabs in the right and left side of
unit and pull the front chassis forward to remove it.
Removing the bottom cover and heat
sink (see Fig.2,3)
1.
Remove one screw A retaining the IC to the heat sink.
2.
Remove two screws B to remove the heat sink.
3.
Turn the upside down, the insert and turn the screwdriver
to remove the bottom cover and protect sheet.
Removing the main board (see Fig.4)
1.
Remove two screws C retaining the rear panel to the
chassis.
2.
Remove two screws D retaining the main board.
KS-FX230
Front chassis
Fig. 1
Bottom cover
Fig. 2
3.
Lift up the main board to remove it. At this time,
remove the connector CP702 connecting the main
board and mechanism assembly.
Removing the rear panel (see Fig.4)
1.
Remove six screws retaining the jacks or the like.
2.
Remove two screws E to the 16-pin jack.
3.
Remove one screw F to remove the line-out jack.
4.
Remove one screw G to remove the antenna jack.
Remove one screw H to remove the changer
controller jack.
Removing the mechanism ass'y (see Fig.5)
1.
Remove four mechanism mounting screws I retaining
the mechanism assembly.
2.
Remove four screws J retaining the cover.
3.
Remove one screw which is the fixation of top cover
and the substrate.
Removing the front panel unit (see Fig.6)
1. Remove four screws K retaining the rear cover.
A
Left side view
BB
Fig. 3
Connection to the mechanism
connector position
C
E
H
F
G
Fig. 4
Mechanism ass'y
JJ
Heat sink
D
Main board
CP702
C
KK
KK
Fig. 6
JJ
Fig. 5
1-3
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