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SERVICE MANUAL
CD RECEIVER
No.49715
Jun. 2002
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
KD-LX333R
KD-LX333R
Area Suffix
E
EX
Continental Europe
Central Europe
Contents
Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
1-2
1-3
1-4
1-13
1-14
1-16
1-16
1-17~33
Flow of finctional operation intil opelation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of Major ICs
KD-LX333R
10
7
8
9
11
12
OFF
STD
M
ATT
SOURCE


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KD-LX333R
1-2
!
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
!
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.


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KD-LX333R
1-3
Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as mechanism unit.
Be careful to use proper grounding in the area where repairs are being performed.
1. Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.
2. Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.
3. Handle the flexible cable carefully as it may break when subjected to strong force.
4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Front bracket
CD mechanism
control board
Damper bracket
CD mechanism ass'y
FD screw
Feed motor ass'y
FD gear
Pickup unit
Soldering


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KD-LX333R
1-4
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)
<Main body>
Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
Bottom cover
A
A
B
Top chassis
Top chassis
Heat sink
C
B
E
F
Top chassis
G
G
D


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KD-LX333R
1-5
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 H 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 to 8)
Prior to performing the following procedure, remove
the top chassis assembly and the front panel
assembly.
Remove the four screws I attaching the front board
on the back of the front panel assembly and release
the eight joints a.
1.
Removing the Front Board (See Fig.9)
Fig.6
Fig.8
Fig.7
Fig.9
Front panel assembly
Front panel assembly
H
H
Front panel assembly
I
I
Joints a
Joints a
CN701
CN701