JVC KD-LX10 User manual

SERVICE MANUAL
CD RECEIVER
No.49537
Feb. 2000
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
This service manual is made from 100% recycled paper.
Printed in Japan
200002(O)
VICTOR COMPANY OF JAPAN, LIMITED
MOBILE ELECTRONICS DIVISION,10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan
KD-LX10
KD-LX30
(No.49537)
KD-LX10/KD-LX30
KD-LX10/KD-LX30
Area Suffix
J ---- Nortern America
Contents
Safety precaution 1-2
Instructions 1-3~
Disassembly method 2-1
Adjustment method 2-4
Maintenance of laser pickup 2-14
Replacement of lase pickup 2-14
Extention code connecting method 2-15
Functions of the mechanism under
the servise mode 2-18
Flow of functional until TOC read 2-20
Description of major ICs 2-23
Block diagrams 2-39
Standard schematic diagrams 2-41
Printed circuit board 2-45,46
Parts list 3-1~7

!CAUTION 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
!CAUTION Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

KD-LX10/KD-LX30
2-1
Remove the two screws A attaching the bottom
cover to the top chassis on the bottom of the body.
Remove the two screws B attaching the top chassis
on both sides of the body.
Remove the two screws C and the two screw D
attaching the heat sink on the left side of the body.
Remove the two screws E and the screw F on the
back of the body.
Remove the two screws G on the upper side of the
body.
Move the top chassis upward and disconnect the CD
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.4-1 (KD-LX30)
Fig.4-2 (KD-LX10)
Fig.5
Bottom cover
A
A
B
Top chassis
Top chassis
Heat sink
C
DB
EF
EFTop chassis
G
G

KD-LX10/KD-LX30
2-2
Prior to performing the following procedure, remove
the top chassis.
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 H attaching the main
board assembly to the bottom cover on the upper
side of the body.
Remove the screw I attaching 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 J and the two screws K
attaching the rear heat sink on the back of the body.
Remove the two screws L and the screw M
attaching the rear panel. Now, the main board
assembly will be removed.
1.
2.
3.
4.
5.
Removing the main board assembly
(See Fig.6 and 7)
when reassembling, correctly engage
the switch S561 and S562 on the main
board with the part e of the operation
assembly (Refer to Fig.6-3).
ATTENTION:
Fig.6-1 (KD-LX30)
Fig.6-2 (KD-LX10)
Fig.7-1 (KD-LX30)
Fig.7-2 (KD-LX10) Fig.6-3
H
CN504
CN701
Front panel assembly
CN702
CN503
H
H
CN504
CN701
Front panel assembly
CN702
S652
CN503
H
Main board S651
J
I
K
L
M
Rear panel
Rear heat sink
L
J
I
K
L
M
Rear panel
Rear heat sink
L
Joint a Joint a
Joint a Joint a
e

KD-LX10/KD-LX30
2-3
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 N attaching 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.6,8 and 9)
Prior to performing the following procedure, remove
the top chassis assembly and the front panel
assembly.
Remove the four screws O attaching the front board
on the back of the front panel assembly and release
the eight joints b.
1.
Removing the Front Board (See Fig.10)
Fig.6-1 (KD-LX30)
Fig.6-2 (KD-LX10)
Fig.8
Fig.9
Fig.10
H
CN504
CN701
Front panel assembly
CN702
CN503
H
H
CN504
CN701
Front panel assembly
CN702
CN503
H
CN701
Front panel assembly
N
N
Front panel assembly
O
O
Joints b
Joints b
Joint a Joint a
Joint a Joint a

KD-LX10/KD-LX30
2-4
Prior to performing the following procedure, remove
the top chassis assembly and the front panel
assembly.
Disconnect the harness from connector CN503and
CN504 on the main board.
Remove the four screws P and detach the lifter unit
from the bottom cover.
1.
2.
Removing the lifter unit (See Fig.11)
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 Q attaching the feed motor
(L).
1.
2.
Removing the feed motor (L) (See Fig.12)
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 R attaching the feed motor
(R).
1.
2.
Removing the feed motor (R) (See Fig.13)
Clutch assembly
Fig.11-1 (KD-LX30)
P
Lifter unit assembly
CN504
CN503
P
Fig.11-2 (KD-LX10)
Fig.12Fig.13
P
Lifter unit assembly
CN504
CN503
P
Lifter unit assembly
Feed motor (L) assembly
Washer Q
R
Clutch assembly
Washer
Feed motor (R) assembly
Lifter unit assembly

KD-LX10/KD-LX30
2-5
Prior to performing the following procedure, remove
the top chassis assembly, the front panel assembly
and the lifer unit.
Remove the screws S attaching 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.14 to 17)
when reassembling, correctly engage
the switch S561 and S562 on the main
board and the right gear with the part e
of the operation assembly.
ATTENTION: Fig.14
Fig.15
Fig.16Fig.17
S
Spring 6
CN702
Operation assembly
Spring 5
S
Operation assembly e
S652
S651
Operation assembly
e
Operation assembly e
S652 S651
Bracket (R) Bracket (L)
Bracket (R)

KD-LX10/KD-LX30
2-6
Prior to performing the following procedure, remove
the operation assembly.
Remove the six screws T attaching 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.18 and 19)
Prior to performing the following procedure, remove
the top chassis.
Remove the three screws U and the CD mechanism
assembly from the top chassis.
1.
Removing the CD mechanism assembly
(See Fig.20)
Button panel
Operation switch board
Button panel
CD mechanism assembly
Fig.18
Fig.19
Fig.20
TT
U
UU

KD-LX10/KD-LX30
2-7
Fig.1
Fig.2
Fig.3
Fig.4
Front bracket
CD mechanism
control board
Shift the lock
Flexible wire
Pickup unit
FD gear
CD mechanism control board
Loading motor Front bracket
Front bracket Pull outward
Pull outward
Flame
Damper bracket
i
f
II
I
F
j
k
G
k
G
Double-sided tape
Pickup cover N
1.
2.
3.
4.
5.
6.
Remove the screw N and the pickup cover attached
to the front bracket with the two double-sided tapes.
Unsolder the part f and g on the CD mechanism
control board.
Remove the stator fixing the CD mechanism control
board and the damper bracket (To remove the stator
smoothly, pick up the center part).
Remove the screw F attaching the CD mechanism
control board.
Remove the CD mechanism control board in the
direction of the arrow while releasing it from the two
damper bracket slots i and the front bracket slot j.
Disconnect the flexible wire from connector on the
pickup unit.
Removing the CD mechanism control
board (See Fig.1 and 2)
Turn the FD gear in the direction of the
arrow to move the entire pickup unit to
the appropriate position where the
flexible wire of the CD mechanism unit
can be disconnected easily (Refer to
Fig.2).
ATTENTION:
Prior to performing the following procedure, remove
the CD mechanism control board and the pickup
cover.
Remove the two springs k attaching the CD mechanism
ass’y and the front bracket.
Remove the two screws G and the front bracket
while pulling the flame outward.
Remove the belt and the screw H from the loading
motor.
1.
2.
3.
Removing the loading motor
(See Fig.3 to 5)

KD-LX10/KD-LX30
2-8
Fig.5
Fig.6
Fig.7
Fig.8
Fig.9
Rear damper bracket
Fix arm (R)
Damper
II
Damper bracket
CD mechanism ass’y
Flame m
m
I
I
Fix plate (L)
ll
Rear damper bracket
Fix arm (L)
Damper
J
Fix plate(R)
J
l
l
H
Loading motor
Belt
Prior to performing the following procedure, remove
the CD mechanism control board and the front
bracket (loading motor).
Remove the three screws I and the damper bracket.
Raise the both sides fix arms and move the fix plates
in the direction of the arrow to place the four shafts l
as shown in Fig.8 and 9.
Remove the CD mechanism ass’y and the two
springs m attaching the flame.
Remove the two screws J and both sides rear
damper brackets from the dampers. Detach the CD
mechanism ass’y from the left side to the right side.
1.
2.
3.
4.
Removing the CD mechanism ass’y
(See Fig.1, 6 to 9)
The CD mechanism ass’y can be
removed if only the rear damper
bracket on the left side is removed.
ATTENTION: