Pioneer deh 4250 sd service manual

Page 1

Pioneer

Service
Manual

CD RECEIVER

DEH-42503 Dms

DEH-42508D/xues1
DEH-42908D/xmo
DEH-3200UB/xuuc

ORDER NO.

CRT4505

DEH-42508D/XNES

This service manual should be used together with the following manual(s):

Model No. Order No. Mech. Module Remarks

CX-3269 CRT4488 S1 tsTD-DOUT CD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly

9:, V?

For details, refer to "Important Check Points for Good Servicing".

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS (USA) INC. PO. Box 1760, Long Beach, CA 90801-1760, USA.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
©PIONEER CORPORATION 2009
K-ZZZ NOV. 2009 Printed in Japan

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SAFETY INFORMATION

CAUTION

This sen/ice manual is intended for qualified sen/ice technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.

Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.

If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so

and refer the repair to a qualified sen/ice technician.

WARNING
This product may contain a chemical known to the State of California to cause cancer, or birth defects or

other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65

Where in a manufacturers service documentation, for example in circuit diagrams or lists

of components, a symbol is used to indicate that a specific component shall be replaced only
by the component specified in that documentation for safety reasons, the following symbol shall
be used:

&

0 Safety Precautions for those who Service this Unit.

When checking or adiusting the emitting power of the laser diode exercise caution in order to get safe, reliable
results.

Caution:
1. During repair or tests, minimum distance of 13 cm from the focus lens must be kept.
2. During repair or tests, do not view laser beam for 10 seconds or longer.

CAUTION:
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHERTHAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

CAUTION
CLASS 1M INVISIBLE LASER RADIATION WHEN OPEN. DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS

WARNING!

The AEL (accessible emission level )of the laser power output is less than CLASS 1
but the laser component is capable of emitting radiation exceeding the limit for
CLASS 1.

A specially instructed person should do servicing operation of the apparatus.

Laser diode characteristics
Wave length : 785 nm to 814 nm
Maximum output : 1 190 pW(Emitting period : unlimited)

Additional Laser Caution

Transistors 0101 in PCB drive the laser diodes.

When 0101 is shorted between their terminals, the laser diodes will radiate beam.
If the top cover is removed with no disc loaded while such short-circuit is continued,
the naked eyes may be exposed to the laser beam.

DEH-42508D/XNES
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