Page 1
SCHEMATIC DIAGRAMS
CASSETTE RECEIVER
KS-FX281
CD-ROM No.SML200310
Area Suffix
UF ---------------------------- China
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
S.BASS
FM
SEL
DISP
78
10
11
9
12
AM
SSM
CD
CH
SCMMO/RND
2-1
2-2
2-5,6
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
No.49869SCH
2003/10
Page 2
KS-FX281
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
Page 3
Block diagram
5
4
DIRECTION BOARD
MAIN
MOTOR
MUTE SWITCH
TAPE/RADIO SW
CP722
RELAY
BOARD
CP721
CN721
TO
SPEAKER
CONNECTOR
LFO+
RFO+
LRO+
RRO+
CP981
LINE REAR OUT
LFORFOLRORRO-
CJ921
LRO
KS-FX281
HEAD
PROG-SW
CJ901
F/R
LCH
IC981
POWER AMP.
IC901
HEAD AMPLIFIER
LROLFO
3
CN901
TO
CD CHANGER
CD LCH
CP751
IC931
E.VOLUME
ANT
2
J1
AM
FM
TAPE IN
PROG
TUL
SDA
SCL
IC701
TU1
AM/FM TUNER PACK
SK/ST, MONO,
SD/ST, S METER,
FM OSC, EO, BAND
IFC/C
SYSTEM CONTROL MICON
TAPE L
F/R
CJ701
1
CP901
DATA
CLOCK
CE
CP701
KEY0 to 2
LCH
LCD1
SW4 to SW47
COM1 to COM3
IC651
LCD DRIVER
KEY
S601
to
S606
S608
to
S612
S614
to
S621
HEAD AMP SECTION
MAIN AMP SECTION
LCD & KEY CONTROL SECTION
AB CD E F G
2-1
Page 4
Standard schematic diagrams
Main amp section
5
4
KS-FX281
KS-FX281
Tuner signal
TAPE signal
Front signal
Rear signal
CD changer signal
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
3
To
LCD & key control section
CP701
2
To
Head amp section
CP721
To
Head amp section
CP901
1
2-2
HAB C DE FG
Page 5
KS-FX281
LCD & Key control section
5
To
Main amp section
4
CJ701
3
2
1
AB CD E F G
2-3
Page 6
KS-FX281
KS-FX281
Head amp section
5
CJ901
QGA2002C1-05
4
IC901
UPC1228HA
C203
R204
330k
C201
C202
820p
100p
0.47/50
R203
C204
C205
100
47/6.3
R201
0.01
15k
C901
100/10
100
R901
R101
3
CP722
QGA2002F1-06
2
R104
330k
15k
C105
C104
0.01
R103
47/6.3
C103
100p
100
C102
C101
0.47/50
820p
TAPE signal
CP721
QGB1214K1-06S
CP901
To
Main amp section CN721
To
Main amp section CN901
QGB1214K1-06S
1
2-4
HAB C DE FG
Page 7
Printed circuit board
Main board
5
KS-FX281
R163
D161
R789
Q784
C985
D715
R164
L781
R762
C931
Q972
R996
IC751
R994
Q987
Q988
R758
C996
R999
R751
C990
C932
R264
R998
R990
R755
CP981
R993
Q789
D781
D782
R790
R753
C991
R997
R795
R796
R788
C997
R992
C994
C972
R991
L783
R754
R764
D973
C785
C992
C784
Q782
R786
C975
C974
Q989
R783
C977
C976
R973
C995
R784
D990
R704
Q701
IC781
C993
C982
R787
C989
R705
C984
C988
D718
D785
CN721
R797
Q783
C986
D784
C981
R985
C987
C983
IC981
Q781
C783
C781
L981
CJ921
D981
R718
C14
R715
D708
C232
C13
R719
R709
C934
D709
C709
R702
R703
R792
CP751
C942
R710
CN901
C943
C231
R726
C705
C933
R61 R62
D716
C710
C131
C134
C233
R707
IC701
C704
C703
D786
C12
D771
C10
J1
C771
R771
Q771
R773
C773
R772
4
3
TU1
R3
R2
C11
R14
C2
C3
C5
C4
C6
C7
R10
C15
Q5
D705
C786
D711
D706
L1
D2
D1
D704
2
D792
R712
R15
C1
Q4
R1
D791
Q772
C8
R713
C133
C772
R774
R7
R52
R51
Q1
R6
R4
Q3
R5
Q2
R17
R9
R714
R725
L782
CJ701
R724
R708
C9
C706
D707
R720
C132
C135
C234
C701
C702
C136
C235
R232
X701
Q261
R971
C137
C707
C236
R131
R761
C940
C238
C237
D261
R265
IC931
R763
R132
C260
D974
C138
R231
Q971
R727
R757
C941
C150
C250
D701
R760
R722
Q161
C751
R721
R931
R972
R165
R752
R263
D961
D713
R759
C160
R941
R785
D714
R756
1
AB C
2-5
Page 8
KS-FX281
5
4
Front board
D601
S602
D620
S603
R603
R602
S601
D619
R639
R638
S604
S605
D618
IC652
D654
D616
S608
R652
C653
D617
LCD1
S606
D613
S609
D614
R608
S610
D615
S611
R609
Revevse side
Forward side
D610
S612
R610
D611
S615
D612
R613
S616
D607
S617
S620
D608
R601
D605
R616
R615
D604
S621
S619
R611
R618
R617
S614
D606
S618
D602
D603
R651
C651
R653
C652
D655
R643
R642
R636
R637
R614
3
R640 R641
CP701
D652
D653
PL603
R654
R656
R655
IC651
R644
R645
D657
PL601
R657
R605
R604
R607
IC652
C654
R649
R648
R647
R646
R658
R635
Mecha board
2
(Relay board) (Head amplifier board)
C203
R204
R201
C105
R101
R104
C103
IC901
C205
R103
R203
C104
R901
C901
CP901
C102
C204
C202
C101
CJ901
C201
CP722
CP721
2-6
1
AB CD
Page 9
< MEMO >
KS-FX281
2-7
Page 10
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.49869SCH)
Printed in Japan
WPC
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