Pioneer gmx 644 service manual

Page 1

Pioneer

GM-X644/X1R/UC

Service
Manual

BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER

GM-X644

GM-X544 x1R/Uc.es

ORDER NO.

CRT2479

CONTENTS
I. SAFETY INFORMATION ............................................ 2 6. ADJUSTMENT ......................................................... 20
2. EXPLODED VIEWS AND PARTS LIST ...................... 2 7. GENERAL INFORMATION ....................................... 21
3. SCHEMATIC DIAGRAM ............. ..6 7.1 DISASSEMBLY ............................. .21
4. PCB CONNECTION DIAGRAM.. 12 8. OPERATIONS AND SPECIFICATIONS.
5. ELECTRICAL PARTS LIST ........................................ 16

PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro»ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 USA.
PIONEER EUROPE N.V. Haven 1087 Keetberglaan 1, 9120 MeIseIe, Belgium

PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04431, Singapore 159936

© PIONEER CORPORATION 2000 K-ZZA. FEB. 2000 Primed in Japan

Page 2

GM-X644.X544

1. SAFETY INFORMATION
. GM-X644/X1R/UC, GM-X544/X1R/UC

CAUTION

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.

WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of

California to cause cancer, birth defects or other reproductive harm.
Health 81 Safety Code Section 25249.6 - Proposition 65

2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING