Pioneer pl 990 service manual

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(U) PIONEER

WArtofEntertmhm

Service \
Manual :3? "' om N0.

Cw nnv 1 s o s

STEREO TURNTABLE

PL-990

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

T MOUGI P R i t The voltage can be converted by the
We .990 w I" me" following method.
KUCXCN1 O AC120V -
WYXCNI O AC220 - 240V -
WVXCNI O A0220 - 240V -
WPWXCNI O AC220 - 240V
RDXCNI 0 AC1 1 0 - 127W220 - 240V With the voItage selector
CONTENTS
I. SAFETY INFORMATION 2
2. PACKING. EXPLODED VIEWS AND PARTS LIST ........... 3
3. SCHEMATIC AND PCB CONNECTION DIAGRAMS 7
4. PCB PARTS LIST .............................................................. 10
5. ADJUSTMENTS 11
6. PANEL FACILITIES 12
7. SPECIFICATIONS ............................................................. 12
PIONEER ELECTRONIC CORPORATION 4-1A Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE, INC. R0.Box 1760, Long Beach, CA 90801-1760, USA.
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087. Keetberglaan 1, 9120 Melsale, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 501 Orchard Road. 310-00 Lane Crawford Place, 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 Calilornia Health and Welfare agency as a known reproductive toxicant which
may cause birth detects or other reproductive harm (Caliiornia 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 sh0u|d be performed lor the
continued protection of the customer and servrce
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 (inputioutput terminals.
screwheads. metal overlays. control shalt, etc). Plug
the AC line cord ol 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.

needing sumo
not be above
Leakage 0 5 TA
CUII'BHI
Demos tester
under
test
Test a I
0130906 metal
1 tonnes:
Also lest wrth H... a, g
plug reversed L.____ . ..
(Us-n»; M: adapter Ea m
Ding as requiredi 3 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
otten not evident from visual inspection nor the
protection afforded by them necessarily can be obtained
by using replacement components rated tor voltage,
wattage, etc. Replacement parts which have these
Special safety characteristics are identified in this
Service Manual.

Electrical components having such leatures are

identitied by marking wrth a i on the schematics and
on the parts list in this Service Manual.
The use ol 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 Satety IS continuously under revrew and new
instructions are issued tromtime to time. Forthe latest
information. always consult the current PIONEER
Service Manual. Asubscription to, or additional copies
of. PIONEER Servrce Manual may be obtained at a
nominal charge from PIONEER.