Pioneer drm 624 x service manual

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PIONEEIT

TheAnofEnIemlnment

Manual

I
I
Serv1ce

ORDER NO.
RRV1 289
CD-ROM CHANGER
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODELISI AND TYPEISI.
Model
Type Power Requirement Remarks
DEM-324x
TUCGM O AC100 - 240V
CONTENTS
I. SAFETY INFORMATION ------------------ 2 5. ADJUSTMENTS ------------------------------ 29
2. EXPLODED VIEWS, PACKING AND 6. IC INFORMATION H -- 40
PARTS LIST ------------------------------------ 4 7. BLOCK DIAGRAM ----- ~- 41
3. SCHEMATIC AND PCB CONNECTION 8. PANEL FACILITIES --------- 42
DIAGRAMS ....................................... 11 9- SPECIFICAT.ONS ............................ 44
4' PCB PARTS LIST ................................. 27

PIONEER ELECTRONIC CORPORATION 4-1. Meguro 1»Chome. Meguro-ku. Tokyo 153, Japan

PIONEER ELECTRONICS SERVISE INC. PO, Box 1760. Long Beach. California 50801 . U.S.A,

PIONEER ELECTRONICS OF CANADA. INC. 300 Allstate Parkway Markham, OnIariO LaFl 0P2, Canada

PIONEER ELECTRONIC [EUROPE] N.V . Haven 1087 Keelberglaan 1. 9120 Melsele, Belgium

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, VicIoria 3195. Australia. TEL: [03] 550-991 I

© PIONEER ELECTRONIC CORPORATION 1995 Tim APR. 1995 Printed in Japan

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DRM-624X

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.

WARNING

Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which
may cause birth defects or other reproductive harm (California Health & 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.

NOTICE

(FOR CANADIAN MODEL ONLY)

Fuse symbols IEE- (fast operating fuse) and/or a (slow operating fuse) on PCB indicate that replacement parts
must be of identical designation.

REMAROUE

(POUR MODELE CANADIEN SEULEMENT)

Les symboies de fusibleEr (fusible de type rapide) et/ou EE (fusible de type lent) sur CCl indiquent que les
pieces de remplacement doivent avoir la meme designation.

- (FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS

The following check should be performed for the
continued protection of the customer and service
technician.
LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground

ANV MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A PO-
TENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.

(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads. metal overlays. control shaft. etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 3.5 mA.

Reading should
not be above
Leakage 3_5 mA

current
tester

Devlce
under
test

Test Ill exposed
metal surlaces

Also test with plug
reversed (Using
AC adapter plug
as required)

etc

Eallh ground

AC Leakage Test

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appli-
ance have special safety related characteristics. These
are often not evident from visual inspection nor the
protection afforded by them necessarily can be ob-
tained by using replacement components rated for
voltage, wattage , etc. Replacement parts which have
these special safety characteristics are identified in
this Service Manual.

Electrical components having such features are

identified by marking with a A on the schematics and
on the parts list in this Service Manual.
The use of a substitute replacement component which
dose not have the same safety characteristics as the
PIONEER recommended replacement one. shown in
the parts list in this Service Manual, may create shock,
fire, or other hazards.

Product Safety is continuously under review and
new instructions are issued from time to time. For
the latest information, always consult the current
PIONEER Service Manual. Asubscription to. or ad-
ditional copies of, PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.