Pioneer vsx 456 service manual

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Service
Manual

AUDIO/VIDEO STEREO RECEIVER

ORDER No.
RRV1 71 3

VSX-DSOGS

VSX-456

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODELISI AND TYPEISI.

Model
Type Power Requiremem Remarks

VSX-DSOSS VSX-456
KUXJ | O O AC120V
KCXJ I O O AC120V

CONTENTS
1. SAFETY INFORMATION ..........................
EXPLODED VIEWS AND PARTS LIST
SCHEMATIC DIAGRAM ................
PCBCONNECWONDMGRAM.
PCBPARTSLBT
ADJUSTMENT .........

@NSQN

. 2 7. GENERAL INFORMATION..
3 7.1 PARTS
8 7.1.1 IC .....
28 7.1.2 DISPLAY.

.. 50 7.3 REMOTE CONTROL UNIT ..........

41 7.2 BLOCK DIAGRAM .....

8. PANEL FACILITIES AND SPECIFICATI

PIONEER ELECTRONIC CORPORATION

4-1, Meguro 1-Chorne. Meguro-kU, Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE. INC. PO. Box 1760, Long Beach. CA 93801-1760, U. S. A.
PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087 Keetberglaan I, 9120 Melsele, Belgium
PIONEER ELECTRONES ASIACENTRE PTE. LTD. 501 Orchard Road, #1000 Lane Crawford Place, Singapore 0923

O PIONEER ELECTRONIC CORPORATION

1997 T-SZE JAN. 1997 Prima In Japan

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VSX-DSO6S, VSX-456

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 oi 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 Calliofnia Health and Welfare agency as a Known reproductive toxicant which

may cause birth defects or other reproductive harm [Caliiomia Health a 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 EB- (fast operating fuse) and/or 3 (slow operating fuse) on PCB indicate that replacement

parts must be cl identical designation.

REMARQUE
(POUR MODELE CANADIEN SEULEMENT)

Les symboles de fusible IEB- (fusible de type rapids) et/ou a (fusible de type lent) sur CCI indiquent que
les pieces de remplacement dolvent avcir Ia meme designation.

F (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. etc.). Plug
the AC Ilne cord of the appliance directly into a 120V
Ac so Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.

Reading should

not be above
Leak-ea 0.5 mA

_ current
Dovrca tester
under

test =-}_+] _

Tut all exposed
metal surface-

Alao ml with plug
morlod

(u-ing ac adapter
plug as required)

so

1 Earth ground

AC Leakage Test

ANY 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.

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 identlfled 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. A subscription to, or ad-
ditional copies of, PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.