• "DVD Logo" is a trademark of DVD Format/Logo Licensing Corporation registered in the US, Japan and other countries.
• Microsoft and Windows Media are either registered trademarks or trademarks of Microsoft Corporation in the United States and/
or other countries.
• Manufactured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of Dolby Laboratories.
• "DTS" and "DTS 2.0 + Digital Out" are registered trademarks of Digital Theater Systems, Inc.
• iPod is a trademark of Apple Computer, inc., registered in the U.S. and other countries.
• "SIRIUS" and the SIRIUS dog logo are registered trademarks of SIRIUS Satellite Radio Inc.
• XM and its corresponding logos are registered trademarks of XM Satellite Radio Inc.
• "SAT Radio," the SAT Radio logo and all related marks are trademarks of SIRIUS Satellite Radio Inc., and XM Satellite Radio, Inc.
• Design and specifi cations are subject to change without notice.
1-6 (No.MA248)
1.1Safety Precautions
SECTION 1
PRECAUTIONS
!
!
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.
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
(No.MA248)1-7
1.2Preventing 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.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
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.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron plate
(3) Handling the optical pickup
• 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.)
• 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.
1.3Handling 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.
1.4Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the DVD pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the DVD pickup unit.
(If the flexible wire is disconnected without applying solder, the DVD pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.
Flexible wire
1-8 (No.MA248)
CN101
Short-circuit points
Mechanism control board
1.5Important for laser products
!
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
CAUTION : Visible and Invisible
CLASS 1
LASER PRODUCT
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MA248)1-9
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-10 (No.MA248)
SECTION 3
DISASSEMBLY
3.1Main body section
3.1.1 Removing the front panel assembly
(See Fig.1)
Push the detach button in the lower left part of the front panel assembly and remove the front panel assembly.
3.1.2 Removing the bottom cover
(See Fig.1)
Reference:
Remove the front panel assembly as required.
(1) Release the two joints a, two joints b and joint c.
(2) Remove the bottom cover from the main body.
Caution:
Do not damage the main board when releasing the joints using
a screwdriver or a similar tool.
Front panel assembly
Detach button
Fig.1
b
Bottom cover
a
3.1.3 Removing the front chassis assembly
(See Fig.3)
• Remove the front panel assembly and bottom cover.
(1) From the both sides of the main body, remove the two
screws A attaching the front chassis assembly.
(2) Release the two joints d and two joints e.
a
b
c
Fig.2
d
A
d
Front chassis assembly
Fig.3
A
e
e
(No.MA248)1-11
3.1.4 Removing the side heat sink
(See Fig.4)
Reference:
Remove the front panel and front chassis assemblies as re-
quired.
From the left side of the main body, remove the two screws B and
three screws C attaching the side heat sink.
B
3.1.5 Removing the rear bracket
(See Fig.5)
• Remove the bottom cover.
(1) From the back side of the main body, remove the screws
D, screw E, tow screws F, three screws G and screw H attaching the rear bracket.
(2) Remove the rear bracket.
Reference:
The quantity of screws D differs by each model.
D
G
G
C
Fig.4
Cable holder
G
E
(For KD-DV4201 and KD-DV4202)
F
G
Side heat sink
Rear bracket
D
Rear bracket
D
G
H
D
G
1-12 (No.MA248)
E
F
Fig.5
D
H
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