Sansui AU 7700 Service Manual
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Extracted text from Sansui AU 7700 Service Manual (Ocr-read)
Page 1
SERVICE MANUAL
STEREO AMPLIFIER
SANSUI All-7700
SANSUI ELECTRIC CO., LTD. ,
Page 2
AU-77OO
This service manual is designed for service engineers to repair, adjust,
maintain and order the replacement parts of the AU-77OO correctly.
When ordering the parts, use the stock numder and parts name speci-
fically referring to the Parts Locations & Parts Lists.
For general usage and maintenance of the unit, please refer to the
Operating Instructions attached with the unit.
TABLE OF CONTENTS
Sec
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SPECIFICATIONS ...................................
BLOCK DIAGRAM AND VALUE OF EACH LEVEL.
ADJUSTMENT
3-1, Driver Circuit Board Adjustment ...
TROUBLESHOOTING CHART .............
4-1. Troubleshooting on Power Supply Section.
4-2. Troubleshooting on Audio Section .......
5. PARTS LOCATIONS AND PARTS LISTS ........................
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5-1. F1092 Equalizer & Power Supply Circuit Board ..............
5~Z. F-2095 Tone Control Circuit Board
5-3. F2096 Accessory Switch Circuit Board .............
5-4. F-2097 Driver & Power Supply Circuit Board ..............
5-5. F2093 Volume Circuit Board
5-6. F-2094 Accessory Switch Circuit Board ..............
5-7. Other Parts (Front Side) .................................. 13, 14
5-8. Other Parts (Top Side) .
5-9. Other Parts (Bottom Side) ................................. 16
REPLACEMENT OF POWER TRANSISTORS .................... 17
PACKING LIST 17
ACCESSORY PARTS LIST . 17
SCHEMATICDIAGRAM 18