Pioneer dvh 3190 service manual

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Pioneer

Service
Manual

DVD RECEIVER

DVH-31 5OU BM

DVH-31 50U B/XN/RD
DVH-31 50U B/xwm
DVH-31 50U B/XN/CNs
DVH-31 90U B/XN/ID

ORDER NO.

CRT4283

DVH-3150UB/XN/FIC

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

Model No. Order No. Mech.Module Remarks

CX-3250 CRT4300 LS1 DVD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly

DTS and DTS Digital Out are registered trademartks and the DTS logos and Symbol are
trademarks of DTS, Inc.

Manufactured under license from Dolby Laboratories. Dolby, Pro Logic, and the double-D
symbol are trademarks of Dolby Laboratories.

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. P.O.Box1760, 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. JAN. 2009 Printed in Japan

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SAFETY INFORMATION

This sen/ice manual is intended for qualified service 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 safety repair
complex products such as those covered by this manual.

lmproperly 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 safety, you should not risk trying to do so

and refer the repair to a qualified service technician.

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 OTHERTHANTHOSE
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 sen/icing operation of the apparatus.

Laser diode characteristics
Wave length:
DVD2660 nm to 670 nm
CD780 nm to 800 nm
Focus lens on Maximum output:
CD:6.26 mW(Emitting period :9 sec.)
DVD:1.27 mW (Emitting period : unlimited)

Additional Laser Caution

Transistors Q1103 and Q1104 in PCB drive the laser diodes for DVD and CD
respectively. When Q1103 or Q1104 is shorted between their terminals,

the laser diodes for DVD or CD 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.

CAUTION

Danger of explosion if battery is incorrectly replaced.

Replaced only with the same or equivalent type recommended by the manufacture.
Discord used batteries according to the manufacture's instructions.

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