Pioneer A-503R Service Manual

Y) PIONEER'
The Art of Entertainment
Service
Manual
STEREO AMPLIFIER
-003R
A-503R-G
A-403R
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
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* : Alter the wiring of the Power-supply block at the primary winding of Power-transformer referring to the "Line Voltage
Selection" described in Service Manual.
ORDER NO.
ARP2853
The illustraton shows model A-503R.
¢ For the following: A-503R/HB and HEWZ; A-503R-G/HEZ; A-403R/HEWZ, refer to page 26.
CONTENTS
1. EXPLODED VIEWS, PACKING AND PARTS LIST --- 2
2. SCHEMATIC AND PCB CONNECTION DIAGRAMS::: 6
3. PCB PARTS LIST cccccceccecetecteceteeseeeseseneeeteseneenees 20
4. IC INFORMATION coccceccteceecescesteteeeteeeeeeeeeseneees 24
5. FOR A-S03R/HB, HEWZ, A-503R-G/HEZ AND
A-4O03R/HEWZ cccceccccececceeterecsecseteteeeseessesecerccaeeees 26
6. PANEL FACILITIES -eceeereeeee ec ecreeeeeeeteteeereccceneeeees 28
7. SPECIFICATIONS cocceccecececeesceseteeeeeseesssseusseeeeeees 31
PIONEER ELECTRONIC CORPORATION = 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham, Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1994 O-FFO APR, 1994 Printed in Japan