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CDX-FM657/X1N/UC
Service
Manual ORDER NO.
CRT2316
UNIVERSAL MULTI-CD SYSTEM
CDX-FM657 X1N/UC
CDX-FM657 X1N/EW
CDX-FM657 X1N/ES
- See the separate manual CX-892(CRT2356) for the CD mechanism description, disassembly and circuit
description.
- The CD mechanism employed in this model is one of C7 series.
CONTENTS
1. SAFETY INFORMATION ............................................3 7. GENERAL INFORMATION .......................................45
2. EXPLODED VIEWS AND PARTS LIST .......................4 7.1 PARTS .................................................................45
3. SCHEMATIC DIAGRAM ...........................................14 7.1.1 IC................................................................45
4. PCB CONNECTION DIAGRAM ................................26 7.1.2 DISPLAY ....................................................51
5. ELECTRICAL PARTS LIST ........................................34 7.2 DIAGNOSIS ........................................................52
6. ADJUSTMENT..........................................................38 7.2.1 DISASSEMBLY .........................................52
7.2.2 TEST MODE ..............................................54
7.3 BLOCK DIAGRAM ..............................................60
8. OPERATIONS AND SPECIFICATIONS.....................62
PIONEER ELECTRONIC 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 U.S.A.
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1999 K-ZZY. FEB. 1999 Printed in Japan
CDX-FM657
- CD Player Service Precautions
1. For pickup unit(CXX1285) handling, please refer 3. Please checking the grating after changing the pick-
to"Disassembly"(See page 52). During replacement, up unit (See page 39).
handling precautions shall be taken to prevent an 4. Since these screws protects the mechanism during
electrostatic discharge(protection by a short pin). transport, be sure to affix it when it is transported for
2. During disassembly, be sure to turn the power off repair, etc.
since an internal IC might be destroyed when a con-
nector is plugged or unplugged.
Seal
After removing the trans-
port screw, cover the hole
with the supplied seal.
Transport screw
Attach to the original position before
transporting the set.
A transport screw has been attached to the
set in order to protect it during transporta-
tion. After removing the transport screw,
cover the hole with the supplied seal.
Be sure to remove the transport screw
before mounting the set. The removed
transport screw should be retained in the
accessory bag for use the next time the set
is transported.
2
CDX-FM657
1. SAFETY INFORMATION
1.1 CDX-FM657/X1N/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 & Safety Code Section 25249.6 - Proposition 65
1.2 CDX-FM657/X1N/EW
1. Safety Precautions for those who Service this Unit.