Sansui 880 DB Service Manual

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SERVICE MANUAL

AM/ F M STEREO RECEIVER

SANSUI BOBBIE/909008
MODE/99008

SANSUI ELECTRIC CO., LTD.

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TABLE OF CONTENTS

a

BOBODB/QOQODB

5 ansui. 890DB/99008

This service manual is designed for service engineers to repair, adjust,
maintain and order the replacement parts of the BOBODB/9OQODB, 890DB/

99ODB correctly.

When ordering the parts, use the stock number and parts name speci-
fically referring to the Parts Location and Parts Lists.

For general usage and maintenance of the unit, please refer to the
Operating Instructions attached with the unit.

Section LIL]? Page
1. SPECIFICATIONS .............................. 2
2. BLOCK DIAGRAM .............................. 3

2- 1. Audio Section ............................ 3
2- 2. Tuner Section ............................ 3
2- 3. Dolby Mode Section .................... 4, 5
3. OPERATION OF DOLBY FM SYSTEM .......... 6
4. ADJUSTMENTS ................................ 6
4- 1. Dolby Circuit Adjustment .............. 6, 7
4- 2. Adjustment of Audio Section ............ 7, 8
4- 3. Adjustment of Tuner Section ............ 8, 9
5. PARTS LOCATION AND PARTS LIST ........ 10
5- 1. F-2549 AM, FM Tuner Circuit Board ...... 10
5- 2. F-2627 Illumination Circuit Board ........ 10
S- 3. F-1519 Front-end Pack .................... 11
5- 4. F-2653 Equalizer Circuit Board ............ 11
S- 5. F-2624 Driver Circuit Board .............. 12
5- 6. F-2544 Tone Control Circuit Board ........ 12
5- 7. F-2617 Mic AMP. Circuit Board ............ 13
5- 8. F-2619 Power Supply Circuit Board of
RF Section .............................. 13
5- 9. F-2657 Power Relay Circuit Board ........ 13
5-10. F-2656 Power Supply Circuit Board ........ 14
5-11. F-2684 Connector Circuit Board (C) ........ 14
5-12. F-2682 Connector Circuit Board (A) ........ 14

Secsion Title [Egg
5-13. F-2683 Connector Circnit Board (B) ........ 14
5-14. F-2692 Connector Circuit Board .......... 14
5-15. F-2695 LED Assy Circuit Board ............ 14
5-16. F-2654 Push Switch Circuit Board .......... 15
5-17. F-2655 Dolby NR Circuit Board ............ 15
5-18. E-2623 Filter Circuit Board ................ 16
5-19. F-2693 Push Switch Circuit Board .......... 16
5-20. F-2694 Dolby Volume Circuit Board ...... 16
5-21. F-269O DIN Terminal Circuit Board ........ 16
5-22. Figures .................................. 16
OTHER PARTS .............................. 17
6- 1. Top Side ................................ 17
6- 2. Bottom Side ............................ 17
6- 3. Exploded View .......................... 18
SCHEMATIC DIAGRAM ...................... 19
7- 1. Tuner Section

(8080DB/909OBD, 890DB/990DB) ............ 19

7- 2. Audio Section (BOBODB/BQODB) ............ 20

7- 3. Audio Section (909ODB/99ODB) ............ 21
THREADING OF DIAL CORD .................. 22

8- 1. Threading of Dial Cord .................. 22

8- 2. Attachment of Dial Pointer .............. 22

9. PACKING LIST ........................ back cover

10. ACCESSORY PARTS LIST ............ back cover