Pioneer plz 990 service manual

Page 1

Service
Manual

STEREO TURNTABLE

PL-990

GD PIONEER"

TheAfiofElmnment

ORDER NO.
RRV 1 6 0 8

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

Model The voltage can be converted by the
Type PL-990 PM" "equi'emem following method.
KUCXCN1 0 A01 20V
WYXCN1 O AC220 - 240V -
WVXCN1 0 A0220 - 240V -
WPWXCNI O AC220 - 240V
RDXCNl O A0110 - 127V/220 - 240V With the voltage selector

CONTENTS

Vacuum»,-

.SAFETY INFORMATION .........................
. PACKING, EXPLODED VIEWS AND PARTS LIST ........... 3
. SCHEMATIC AND PCB CONNECTION DIAGRAMS
PCB PARTS LIST ...................................
. ADJUSTMENTS ......
. PANEL FACILITIES.
. SPECIFICATIONS ..

.......................... 2

........................... 1O

PIONEER ELECTRONIC CORPORATION
PIONEER ELECTRONICS SERVICE, INC,

4-1, Meguro 17Chome, Meguroiku, Tokyo 153, Japan
EQBox 1760, Long Beach, CA 90801-1760. U.S,A.
PIONEER ELECTRONIC [EUROPEI N.V. Haven 1087, Keetbarglaan 1, 9120 Melsale, Belgium

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

© PIONEER ELECTRONIC CORPORATION 1996

T-FFB JUNE 1996 Printed in Japan

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PL-990

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.

_ (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
(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. elc.). 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 0.5 mA.

¥

0

Heading should
not be above
0.5 fflA

Leakage

current
Device tester
under
test
Test all
enticed metal
surfaces
0
M50 I681 wltl'l
plug reversed
[Using AC solider Eanh
plug as required) T ground

AC Leakage Test

ANY MEASUREMENTS NOT WITHIN THE
LIMITS OUTLINED ABOVE ARE INDICATIVE
OF A POTENTIAL SHOCK HAZARD AND
MUST BE CORRECTED BEFORE RETURN-
ING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance
have special safety related characteristics. These are
often not evident from visual inspection nor the
protection afforded by them necessarily can be obtained
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. Forthe latest
information. always consult the current PIONEER
Service Manual. A subscription to, or additional copies
of, PIONEER Service Manual may be obtained at a
nominal charge from PIONEER.