JVC KS-LX200R User manual

1-1
KS-LX200R
SERVICE MANUAL
No.49573
Oct. 2000
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
KS-LX200R
This service manual is printed on 100% recycled paper.
CASSETTE RECEIVER
KS-LX200R
Area Suffix
E
EX Continental Europe Central Europe
KS-LX200R
10 78 911 12
OFFSEL
Contents
Safety precaution 1-2
Disassembly method 1-3
Adjustment method 1-13
Description of major ICs 1-17

1-2
KS-LX200R
!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.
Safety precaution

1-3
KS-LX200R
Remove the two screws Aattaching the bottom
cover to the top chassis on the bottom of the body.
Remove the two screws Battaching the top chassis
on both sides of the body.
Remove the screw Cand the three screws D
attaching the heat sink on the left side of the body.
Remove the two screws Eand the screw Fon the
back of the body.
Remove the two screws Gon the upper side of the
body.
Move the top chassis upward and disconnect the
cassette mechanism connector from the main board
connector by pulling it. Remove the top chassis from
the body.
1.
2.
3.
4.
5.
6.
Disassembly method
Removing the top chassis(See Fig.1 to 5)
Fig.1
Fig.2
Fig.3
Fig.4Fig.5
Bottom cover
A
A
B
Top chassis
Top chassis
Heat sink
C
DB
EF
Top chassis
G
G

1-4
KS-LX200R
Prior to performing the following procedure, remove
the top chassis.
Remove the screw Sattaching the bracket (L).
Disconnect the flexible harness from connector
CN701, the card wire from CN702 on the main board
and the harness from CN503 and CN504
respectively.
Remove the three screws Hattaching the main
board assembly to the bottom cover on the upper
side of the body.
Remove the screw Iattaching the rear panel and the
bottom cover on the back of the body. Move the
main board in the direction of the arrow and release
the two joints a. (At this point, the main board can be
removed with the rear panel and the rear heat sink.)
Remove the screw Jand the two screws Kattaching
the rear heat sink on the back of the body.
Remove the two screws Land the screw Mattaching
the rear panel. Now, the main board assembly will be
removed.
1.
2.
3.
4.
5.
6.
Removing the main board assembly
(See Fig.6 to 8)
When reassembling, correctly engage the
switch S561 and S562 on the main board
with the part eof the operation assembly
(Refer to Fig.7, 18 and 19).
ATTENTION:
Fig.6
Fig.8
Fig.7
H
H
CN504
S
CN701
Front panel assembly
Main board assembly
CN702
CN503
H
S652
Main board S651
J
I
K
L
M
Rear panel
Rear heat sink
L
Joint aJoint a
e
Bracket (L)

1-5
KS-LX200R
Prior to performing the following procedure, remove
the top chassis assembly.
Disconnect the flexible harness from connector
CN701 on the main board assembly.
Remove the four screws Nattaching the front panel
assembly on both sides of the body. Remove the
front panel toward the front.
1.
2.
Removing the front panel assembly
(See Fig.9 to 11)
Prior to performing the following procedure, remove
the top chassis assembly and the front panel
assembly.
Remove the four screws Oattaching the front board
on the back of the front panel assembly and release
the eight joints b.
1.
Removing the Front Board (See Fig.12)
Fig.9
Fig.10Fig.11
Fig.12
CN701
Front panel assembly
Main board assembly
CN701
Front panel assembly
N
N
Front panel assembly
O
O
Joints b
Joints b

1-6
KS-LX200R
Prior to performing the following procedure, remove
the top chassis assembly and the front panel
assembly.
Disconnect the harness from connector CN503 and
CN504 on the main board.
Remove the four screws Pand detach the lifter unit
from the bottom cover.
1.
2.
Removing the lifter unit (See Fig.13)
Prior to performing the following procedure, remove
the lifter unit.
Remove the washer attaching the clutch assembly
and detach the clutch assembly from the shaft of the
lifter unit.
Remove the two screws Qattaching the feed motor
(L).
1.
2.
Removing the feed motor (L) (See Fig.14)
Prior to performing the following procedure, remove
the lifter unit.
Remove the washer attaching the clutch assembly
and detach the clutch assembly from the shaft of the
lifter unit.
Remove the two screws Rattaching the feed motor
(R).
1.
2.
Removing the feed motor (R) (See Fig.15)
Clutch assembly
Fig.13
P
Lifter unit assembly
CN504
CN503
P
Fig.14
Fig.15
Lifter unit assembly
Feed motor (L) assembly
Washer Q
R
Clutch assembly
Washer
Feed motor (R) assembly
Lifter unit assembly

1-7
KS-LX200R
Prior to performing the following procedure, remove
the top chassis assembly, the front panel assembly
and the lifer unit.
Remove the three screws Sattaching the right and
left brackets which fix gears on both sides of the
operation assembly.
Remove the springs 5 and 6 from the operation
assembly.
Disconnect the card wire from connector CN702 on
the main board and remove the operation assembly.
1.
2.
3.
Removing the operation assembly
(See Fig.16 to 19)
When reassembling, correctly engage the
switch S561 and S562 on the main board
and the right gear with the part cof the
operation assembly.
ATTENTION: Fig.16
Fig.17
Fig.18Fig.19
S
Spring 6
CN702
Operation assembly
Spring 5
S
Operation assembly c
S652
S651
Operation assembly
c
Operation assembly c
S652 S651
Bracket (R) Bracket (L)
Bracket (R)

1-8
KS-LX200R
Prior to performing the following procedure, remove
the operation assembly.
Remove the six screws Tattaching the button panel
on the operation assembly.
Pull out the operation switch board from inside of the
button panel.
1.
2.
Removing the operation switch board
(See Fig.20 and 21)
Prior to performing the following procedure, remove
the top chassis.
Remove the four screws Uand the cassette
mechanism assembly from the top chassis.
1.
Removing the cassette mechanism
assembly (See Fig.22)
Button panel
Operation switch board
Button panel
CD mechanism assembly
Fig.20
Fig.21
Fig.22
TT
U U
UU

1-9
KS-LX200R
Disconnect the wire from connector CP401 on the
head amplifier board.
Remove the screw A.
Remove the head amplifier board in the direction of
the arrow to unhook two joints a.
Disconnect connector CP402 on the head amplifier
board from the connector board.
1.
2.
3.
4.
Disassembly method
<Cassette mechanism assembly>
Removing the head amplifier board
(See Fig.1)
Unsolder soldering band con the connector board.
Remove the three screws C.
Remove the connector board in the direction of the
arrow to unhook joint d.
1.
2.
3.
Removing the connector board
(See Fig.3)
Prior to performing the following procedure, remove
the head amplifier board and the mechanism
bracket.
<Cassette mechanism>
Prior to performing the following procedure, remove
the head amplifier board.
Remove the four screws Bon the underside of the
cassette mechanism assembly.
1.
Removing the mechanism bracket
(See Fig.2)
Connector board Head amplifier board
Joints
a
A
Fig.1
Fig.2
Fig.3
B
B
B
Mechanism bracket
C
Soldering b
Soldering c
C
C
Joint d
Connector board

1-10
KS-LX200R
Prior to performing the following procedure, remove
the connector board.
Remove the slit washer eretaining the load arm
assembly.
Remove the spring gin the load arm assembly
marked joint f.
Draw out the load arm assembly from the shaft and
rotate in the direction of the arrow to remove it from
the cach.
1.
2.
3.
Removing the load arm assembly
(See Fig.4)
Prior to performing the following procedure, remove
the connector board and the load arm assembly.
Remove the two screws Dattaching the sub
chassis.
Draw out the sub chassis from the holder arm shaft
in the direction of the arrow (marked joint h).
Remove the sub chassis from the main chassis
upwards.
1.
2.
Removing the sub chassis (See Fig.4)
Prior to performing the following procedure, remove
the connector board and the load arm assembly.
Remove the screw Eattaching the cassette holder /
holder arm.
Draw out the holder arm shaft from the sub chassis
in the direction of the arrow (marked joint h).
Disengage two joints iand remove the cassette
holder / holder arm.
1.
2.
3.
Removing the cassette holder / holder
arm (See Fig.5)
The spring gcomes off as the load
arm assembly is drawn out from the
shaft.
ATTENTION:
Load arm assembly
Holder arm Load arm assembly
Joint h
Joint f
Slit washer e
Load arm
assembly
Spring g
Sub chassis
Cassette holder
Main chassis
Worm gear
Fig.4
Fig.5
D
D
EJoint h
Sub chassis
Cassette holder
Main chassis
Joints i
Holder arm
Cach