Onkyo A 8047 Service Manual

Page 1

A-8047V

SERIAL NO. 3217

DNKYOGM SERVICE MANUAL

Integrated Stereo Amplifier
MODEL A-8047V

UD 120V AC, 60H'z

SAFETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A ON THE
SCHFMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGEJCURRENT OR RESISTANCE MEA-
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.

TABLE OF CONTENTS

Item

Page

Specifications

Block diagram
Precautions

Exploded View

Exploded View parts list
Front panel facilities
Printed circuit board parts list
System connections
Packing procedures

IC block diagram

Printed circuit board View
Schematic diagram

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ON KYO®
AIIIIIII BIIMPIINIIIIS

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CHASSIS-EXPLODED VIEW-PARTS LIST

REF. N01 PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION

A1 27110255A Front bracket A806 28322346 Knob, Speaker, right

A3 27190397 Holder Q501(Q601) 222051 STK-4044V, IC

A4 28133142 Back plate AT9OI 2300016 NPl-887D, Power transformer

A5 28191317 Clear plate A F901 252052 7A(ST-6), Primary {use

A8 27115193 Side bracket AS901 25035201 NPS-111-L165P, Power switch
A10 27160175 Radiator 135902 25065123 NPS-1258P, Slide switch

All 27141020 Bracket HE A\C901 3500065A 0.011.113, AC400V/125V, Capacitor
A12 800509 Spring C901 a 27300601 $131925, Cover capacitor

A14 27130404 Bracket PT AP901 253112 AS-UC-4 #18, Power suPply cable
A17 27120747 Back panel 1BP902 25050139 NSCT-6P38, AC outlet

A18 27300750 #2271, Strainrelief P805 25 060044 3 X 14, Ground terminal

A301 28184295 Top cover U1 17858588 NAMA2388, Equalizer and Power
A500 17858121 Front panel assy amplifier pc board assy

A510 834430068 3TTS+GB(BC), Tapping screw U2 17858589 NAAF-2389, Tone/Muting/Volume
A601 27170208 Bottom board pc board assy

A602 27175028 Bottom leg U3 178585 90 NAFU-2390, Fuse pc board assy
A603 834430068 3TTS+6B(BC), Tapping screw U4 17858591 NASW-2391 , Speaker switch pc
A801 28322058A Knob, VOLUME board nssy

A802 28322059 Knob, TONE U5 17858592 NASJ-2392, Headphonejnck pc
A803 2832190513 Knob, POWER hoard assy

A804 28322345 Knob, SPEAKER, Iell U6 17858510 NASW-2410, Mode switch pc board
A805 28322213 Knob, PUSH ass'y

NOTIC THE COMPONENTS IDENTIFIED BY MARK
ARE CRITICAL I-OR RISK OI FIRE AND .

1", ICCTRIC SHOCK. REPLACF ONLY WITII ;
PARTS NUMBER SPECIFIED.

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FRONT PANELFACILITIES

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1 1, M 1751
. Power switch (POWER)

. Speaker Selector (SPEAKERS)
Headphone jack (PHONES)

. Bass Control (BASS)

. Treble Control (TREBLE)

. Balance Control (BALANCE)

. Level Meters

. Volume Control (VOLUME)

1 Input Selector Switches and Indicators (INPUT SELECTOR)
. Tape Monitor Switch and Indicator (MONITOR)

1 Simulated Stereo (SIMULATED STEREO)

. Loudness Control (LOUDNESS)

. Audio Muting (MUTING)

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