Pioneer cdxp 620 s service manual

Page 1

GD PIONEER

The Art of Entertainment

Service
Manual

MULTI-COMPACT DISC PLAYER

CDX-PSESS uc
CDX-PSEDS UEESEW

Eflfigfi

DIGITAL AUDIO

CDX-PGZSS/UC

ORDER NO.

CRT 1 854

I See the separate manual CX-SSZICRT1857) for the CD mechanism description, disassembly and circuit
description.

O The CD mechanism employed in this model is one of CX-652 series.

CONTENTS
1. SAFETY INFORMATION ............................................ 2 7. IC INFORMATION ..................................................... 17
2. SPECIFICATIONS ........................... ...3 8. ELECTRICAL PARTS LIST
3. OPERATION AND CONNECTION. ...4 9. BLOCK DIAGRAM ............... ..
4. DISASSEMBLY 6 10. CIRCUIT DIAGRAM AND PATTERN .. ..26
5. ADJUSTMENT. 7 11. EXPLODED VIEW AND PARTS LIST ...42

6. TEST MODE. .14 12. PACKING METHOD ..

PIONEER ELECTRONIC CORPORATION 4-1. Meguro 1»Chome. MegurO-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. ROIBox 1760, Long Beach, CA 90801-1760 USA.

PIONEER ELECTRONIC [EUROPE] N.V. Haven 1037 Keetberglaan 1, 9120 Melsele. Belgium

PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 501 Orchard Road, #10-00, Lane Crawford Place, Singapore 0923

© PIONEER ELECTRONIC CORPORATION 1995 FM JUNE 1995 Primed in Japan

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CDX-PBEES.PBEOS

C CD Player Service Precautions

1. For pickup unit(Service)(CXX1235) handling, please 2. During disassembly. be sure to turn the power off
refer to'Disassembly'lCX-GSZ Service Manual since an internal lC might be destroyed when a con-
CRT1857). nector is plugged or unplugged.

During replacement, handling precautions shall be 3. Please checking the grating after changing the pickup
taken to prevent an electrostatic discharge(protection unitisee page 8) since these screws protects the
by a short pin). mechanism during transport, be sure to affix it when

it is transported for repair, etc.

%

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 trans-

portation. 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 Fig. 1
accessory bag for use the next time the

set is transported.

1. SAFETY INFORMATION
1.1 CDX-PGZBS/UC. PGZOS/UC
W

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.
lf 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

Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxi-
cant which may cause birth defects or other reproductive harm (California Health 8t Safety Code, Section 25249.5).
When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin
contact with the solder. Also, when soldering do not inhale any smoke or fumes produced.