Sansui SC 3003 Service Manual

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SERVICE MANUAL

STEREO CASSETTE TAPE DECK

8All8lll 80-2000
80-2002
80-3000
80-3003

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This service manual is designed for service engineers to repair, adjust,
maintain and order the replacement parts of the 502000, SC-2002,
SC-3000, SC-3003 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,

TABLE OF CONTENTS

Section Title Page
1. SPECIFICATIONS .................................................. 2
2. BLOCK DIAGRAM. ................. 2

3. ADJUSTMENTS ........................................
3-1. Tape Speed Adjustment ,,,,,,,,
3-2, Playback Adjustment ...........
3-3. Recording Adjustment ........

4. TROUBLESHOOTING CHART .........

5. PARTS LOCATIONS AND PARTS LIST
S-T (3-1197 Main Circuit Board ..........
5-2. (3-1198 Power Circuit Board .,

5-3, (1-1199 Shut-off Circuit Board ...........................
5-4. (3-1200 LED. Circuit Board ............................. 9
5-5. 6-1201 Switch Circuit Board ........................... 9
5-6. (3-1211 LED» Circuit Board ...................................... 9
5-7. 6-1212 Switch Circuit Board .................................... 9
5-8. Figures ........................................................ 9
6. DISASSEMBLY WITH EXPLODED VIEWS AND PARTS LIST ...... 10
6-1. Hardware Nomenclature ...................................... 10
6-2. Disassembly of the Chassis Section .................. .. 11, 12
6-3. Disassembly of the Mechanism Assy ........................ 13, 14

<> Faking List .......................
OAccessory Parts List .................

7. OPERATION OF MECHANISM .............
7-1. Driving Mechanism .....................
7-2, Forward Mode .......................

7-3. REC Mode .. ........................
7-4. Fast Forward and Rewind Operation .
7-5. Pause Mode .......................

8. SCHEMATIC DIAGRAM ..........................................
8-1. 502000, SC-2002 Schematic Diagram ............................ 17
8-2. SC-3000, SC-3003 Schematic Diagram . 18

9. REPLACEMENT OF MAIN PARTS ..... 19
9-1. Replacement of Mechanism Assy ..... 19

9-2, Replacement of Cassette Assy ................................. 19
9~3. Rep|acement of Cassette well and Cassette lid .................... 19

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Parts List

Parts No. Stock No. Description Parts No. Stock No, Description
1 5101152 13 Type Screw, M4><8 55 5110241 Hex. N111, M3
2 5000010 Meial Bonnel 56 5109911 0 Type Screw, M3 x 5
3 5109122 ET Type Screw, M3 x s 57 7590200 G-1 199 Shulcofl Circuir Board
4 7105130 c Type l 5 5318410 TY (S.47) Type Knob, level conirol 59 5101042 11 Type Screw, M3 x 5
6 2420440 51 Conneclor 50 {5430070 Tape Counler ,,,,,, 503000, 3003
7 5103521 BT Type screw, M25 x 5 5430080 Tape caunrer ...... 502000, 2002
7590230 (3-1200 LED Circuir Board 51 Mechanism Assy
8 I ...... 503000, 3003 52 0400530 Rilor lamp (14v eomA)
17590240 341211 LED Circuii Board 63 5440040 Lamp Tube
...... 502000, 2002 64 4300930 v0 Merer
9 7105140 Push 5011011 (A), power swirch 55 5040470 Swirch Mask
10 5905032 Spring, power swilch 66 5107811 PSA Type Screw, M25 x 4
7000090 From Panel Assy ...... 503000 7590240 G420! Swirch Circuir Board
1 1 [7000110 From Panel Ass'yx. . . 503003 67 J ...... 503000, 3003
17000100 From Panel Ass'v. .. SC-2000 17590250 c.1212 Swirch Circuii Board
7000120 From Panel Ass'y ...... SC.2002 ...... 502000, 2002
12 5109122 BT Type Screw, M3 x s 68 5040480 Jack Mask
13 5109915 B Type Screw, M3 x 12 59 Hex. N01, M12
14 5510120 Rubber Feel 70 1 Type Washer, 1211
15 5050200 Bollom Riare 71 1000340 Serni Variable Resislor
16 5109122 BT Type Screw, M3 X8 72 1011090 Semi Variable Resisror
17 5440050 Lamp Filter 73 5107353 PSA Type Screw, M3 x 5
13 {0420070 Pilo1 Lamp (81 100mA) 74 2410970 Vol1age Selecror
5440050 Lump Tube 75 5109915 F Type Screw, M4 x 5
19 7590220 6-1202 Lamp Circull Board 76 5120151 F Type Washer. 41,1
20 5107853 PSA Tvpe Screw, M3 X 6 77 4002370 Power Translorrner
2] {0659801 Ceramic Capacilor 0.01/4F 150V 78 5109913 PT Type Screw, ~13 X 5
5515220 Tube (For Capaciror) 79 7501400 (3-1198 Power Circuir Board
22 1131200 Power Swilch 80 5109910 PT Type Screw, M3 x 8
23 5040480 Jack Mask 7590190 01197 Main Circuil Board
24 Hex. Nur, M12 I ...... 503000, 3003
25 P Type Washen 121/1 8] 7590270 G-1l97 Main Circuil Board
26 2430190 Headphone Jack 1 ...... 502000, 2002
27 5151002 E Yype Washer, 21,3 32 3910490 Cord Clip
28 Shah, plunger solenoid 33 3800261 Power Cord
29 Shut-0H Lever 84 5100344 13 Type Screw, M3><8
30 5150310 Screw, M25 85 5110241 Hex. Nul, M3
31 5107512 PSA Type Screwi M246 X 6 86 0107474 Carbon Resislor 470m law
32 5103323 P Type Screw; M16 X6 87 0107474 carbon Resis1or470kfl MW
33 5120120 P Type Washerr 2459" 88 0107823 Carbon Resisior 8219 MW
34 6030140 Tension Bell 89 0107823 Carbon Resislor 82) MW
35 5105502 5C Type Screw W X 3 90 7710090 inpul.Ourpur Terminal Ass'y
36 7060220 Melor Pulley 91 2430170 Microphone Jack
37 4320360 M9101 92 5100221 13 Type screw, M25 x 4
33 5101042 5 Type Screw: M3 X 5 93 1190330 Lepl swilch (H.7159), PLAY
39 4340150 Plunger Solenoid 94 5,0022, 11 Type Suew, M2.6 X 4
40 5107811 PSA Type Screw: M16 X 4 J 1190320 Leal.swilch(H-715s),REw1ND
41 1190340 Leal Swirch (H-7150). PAUSE 95 ...... 5030ng 3003
42 Bracket P'Unger SO'enOid 1 N51 Included in 502000, 2002
43 Reminer. wheel 95 Brucke1, leal swimh
44 5040450 Bulion MaeR
45 5107853 PSA Type Screw, M3><5
46 5107812 PSA Type Screw, M2,6>< 5
A7 Bracken mechanism uss'y
48 5030150 Counier Bell
49 5107853 PSA Type Screw, M3 x 5
50 5500570 Rubber Holder, reed swirch
{1 190350 Reed swirch
51 Blocke1, reed swilch
52 E Type Washes, 1.04)
53 7050210 Caunier idler Ass'y
54 5107853 PSA Type Screw. M3 x 5

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