Pioneer A-77X Service Manual

VU) PIONEER'
Service
PALETUET
CIRCUIT DESCRIPTIONS
REPAIR & ADJUSTMENTS
ORDER NO.
ARP-691-0
STEREO AMPLIFIER
MODEL A-77X COMES IN SEVEN VERSIONS DISTINGUISHED AS FOLLOWS:
ae
[sme
a
T= [ria 200.20) | oomenwimes [Of
a ee
S AC110V, 120V, 220V, 240V (switchable) U.S. Military model
e This service manual is applicable to the KU type.
For servicing of the KC, HE, HB and S, S/G, HEZ types, please refer to the additional service manual.
CONTENTS
1, SPEGIFIGATIONS «2.4400 52%anneuseeus 2 6. EXPLODED VIEW AND PARTS LIST....... 9
2. FRONT PANEL FACILITIES ............. 3 7. P.C. BOARDS CONNECTION DIAGRAM..... 14
3. BLOCK DIAGRAM ..............00008. 5 8. SCHEMATIC DIAGRAM ................ 20
a: PACKING ; :492200 4444 Hee 022 oe FE BRAS 6 9. ELECTRICAL PARTS LIST .............. 23
3: PARTS LOCATION «i246 4¢0necm 224405 dees 7 10. SAFETY INFORMATION................ 27
PIONEER ELECTRONIC CORPORATION 4-1. Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS [USA] INC. P.O. Box 1760, Long Beach, California 80801 U.S.A.
TEL: [800) 421-1404, (800) 237-0424
PIONEER ELECTRONIC [EUROPE] N.V. Keetbergiaan 1, 2740 Beveren, Belgium TEL: 03/775-28:08
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
TEL: (OS) asBO-S31"
YA © FEB. 1985 Printed in Japan