Pioneer pdm 407 service manual

Page 1

Pioneer

Service
Manual

MULTI COMPACT DISC PLAYER

PD-M427
PD-M407

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

CZ:
Ellfl ORDER NO.
' I - RRV2122

T e Model Power Re uirement The voltage can be converted by
yp pD.M427 pD_M407 q the following method.
WPWXJ O O A0220-240V -
RDXJ O O AC110-127V/220-240V With the voltage selector
CONTENTS

1. SAFETY INFORMATION .................................... 2 7. GENERAL INFORMATION .............................. 29
2. EXPLODED VIEWS AND PARTS LIST ............. 4 7.1 DISPLAY .................. 29
3. SCHEMATIC DIAGRAM ................................... 10 7.2 BLOCK DIAGRAM .30

4. PCB CONNECTION DIAGRAM
5. PCB PARTS LIST
6. ADJUSTMENT ........

8. PANEL FACILITIES AND SPECIFICATIONS
................................................................... 31

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. PO. Box 1760, Long Beach, CA 90801-1760, USA.
PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
©PIONEER ELECTRONIC CORPORATION 1999 _ _
T-ZZR APR. 1999 Printed In Japan

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PD-M427, PD-M407

1. SAFETY INFORMATION

This service 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 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 service technician.

IMPORTANT
THIS PIONEER APPARATUS CONTAINS
LASER OF CLASS 1.
SERVICING OPERATION OF THE APPARATUS
SHOULD BE DONE BY A SPECIALLY
INSTRUCTED PERSON.

LASER DIODE CHARACTERISTICS 7
MAXIMUM OUTPUT POWER: 5 mw
WAVELENGTH1780 , 785 nm

LABEL CHECK

Additional Laser Caution

1. Laser Interlock Mechanism

The ON/OFF (ON: low level, OFF: high level)
status of $601 (LPSt) and $602 (LPSZ)
switches for detecting the loading state is
detected by the system microprocessor, and
the design prevents laser diode oscillation
except when both switches 8601 and 8602
are ON (low level or clamped state).

Thus, interlock will no longer function if
switches 8601 (LPSI) and $602 (LPSZ) are
deliberatery shorted (low level). The interlock
also does not function in the test mode*.

Laser diode oscillation will continue, if pin 33
CAUTION of CXA178ZCQ 00151) on the MOTHER

INVISIBLE LASER
RADIATION WHEN OPEN,
AVOID EXPOSURE
TO BEAM PRW1018

WPWXJ type Only

BOARD ASSY is connected to GND, or pin
50 of ICSSI (LDON) is connected to low level
(ON), or else the terminals of 0151 are shorted
to each other (fault condition).

2. When the cover is opened with the servo
mechanism block removed to be turned over,
close viewing of the objective lens with the
naked eye will cause exposure to a Class 1
laser beam.

* Refer to page 22.