Sansui 890 990 Service Manual

Page 2

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NOTE:

This service manual includes two model numbers, #990 and #890
together as indicated Model @and (Q in parts lists, schematic diagram
and others.

MODEL ® .................... fi 990

MODEL (13» .................... $890
When ordering parts, use the parts name and stock No. after confirming
either Model ® or (B).

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TABLE OF CONTENTS

Section Lie Page
1. SPECIFICATIONS ................................................ 2
2. THREADiNG OF DIAL CORD. . 3

2-1. Threading of Dial Cord ...... Mr 3
2-2. Attachment of Dial Pointer ..... ... 3
3. ALIGNMENTS AND ADJUSTMENT ............................. 3
3-1. Driver Circuit Board Adjustment ................................ 4
3-2. FM Adjustment & Alignment ....................... 4, 5, 6
3-3 AM lF Adjustmet & Tracking. . .......................... 6
4. OPERATION BLOCK DIAGRAM 7
4-1. Tuner Section ................................................ 7
4-2. Audio Section ................................................ 7
5. TROUBLE SHOOTING CHART .................................... 8

5-1. Audio Section ...
5»2. Tuner Section
6. PARTS LOCATION AND PARTS LIST .....................
6-1. F-2546 Power Supply Circuit Board ............... 2 ..... ..
6-2. F-2547 Protector Circuit Board ................................
6-3. F2543 Tone Control Circuit Board ............................
6-4. F-2436 Driver Circuit Board ............
6-5. F-2545 Filter 8 Muting Circuit Board ..........

6-6. F-2541 Equalizer Circuit Board ............... ..
6-7 F-2431 Power Supply Circuit Board ............................ 13
68. F-2544 Tone Control Circuit Board ............................ 14
6-9. F-2542 Accessory Switch Circuit Board. . . . . r 14
6-10. F-2549 FM, AM Tuner Circuit Board .... 15, 16
6-11 F-2550 Multi-Path Circuit Board. . .. H . 16
6-12 F-1470 Lamp Circuit Board .................................... 16
6-13 F-2597 Connector Circuit Board ................................ 16
6-14. F-2548 Protector Connector Circuit Board H ., 16
6-15. F4519 FM Pack .... . t. 17
6-16, Figures .............. ., 17
7. SCHEMATIC DIAGRAM .................................. 18, 19, 20
8. OTHER PARTS .............................................. o.
8-1. Other Parts (Top Side). .............

8-2. Other Parts (Front Side) . .......
9. PACKING LIST ...................
10. ACCESSORY PARTS LIST ........................................ 22