Toshiba SA 520 Service Manual
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Extracted text from Toshiba SA 520 Service Manual (Ocr-read)
Page 1
TOSHI BA»
fAM/FM STEREO RECEIVER
SIX-520
M.
, a». .
SERVICE DATA
FILE NO. 170-027
Page 2
SA-520
TABLE OF CONTENTS
FEATURES .......................................................... 2
1 OPERATING CONTROLS ............................................ 3
1-1 FRONT VIEW ................................................ 3
1-2 REAR VIEW ................................................. 3
2 PARTS LOCATIONS ................ O ................................ 4
21 CHASSIS TOP VIEW ........................................... 4
2-2 CHASSIS BOTTOM VIEW ........................................ 4
3 DISASSEMBLY INSTRUCTIONS ....................................... 5
3-1 CABINET REMOVAL ........................................... 5
3-2 BOTTOM BOARD REMOVAL .................. . .................. 5
4 TECHNICAL POINTS ............................................... 6
5 CIRCUIT ADJUSTMENTS ........................................ 7 ~ 11
5-1 POWER AMP. ADJUSTMENT ..................................... 7
52 AM ADJUSTMENT ............................................. 8
53 FM ADJUSTMENT ............................................. 10
5-4 FM MPX ADJUSTMENT ......................................... 11
6 DIAL CORD STRINGING ............................................ 12
7 ELECTRICAL PARTS LOCATIONS ................................. 13 ~ 14
7-1 BOTTOM VIEW OF PROTECTOR P.C. BOARD (PRO-2A UNIT) ............ 13
7-2 BOTTOM VIEW OF SUPPLY P.C. BOARD (SPLY-26 UNIT) ................ 13
7-3 BOTTOM VIEW OF POWER AMP. P.C. BOARD (PA-423 UNIT) ............ 13
7-4 BOTTOM VIEW OF CONTROL P.C. BOARD (AF-121B UNIT) .............. 14
7-5 BOTTOM VIEW OF TUNER P.C. BOARD (STP~46 UNIT) ................. 14
7-6 BOTTOM VIEW OF EOUALIZER P.C. BOARD (AF-120 UNIT) ............. 14
8 BLOCK DIAGRAM ................................................. 15
9 SEMICONDUCTOR BASE DIAGRAMS .................................. 16
10 SCHEMATIC DIAGRAM ............................................. 17
11 CABINET 'EXPLODED VIEW ......................................... 18
12 PARTS LIST ................................................. 19 ~ 23
FEATURES
1. Automatic Reset Protective Circuit (Speaker Protection, Power Transistor Protection)
2. Totally Direct~connected Pure Complementary OCL Power Amplifier
3. FM Front-end using FET and Four-variable Capacitors
4. Wide Scale Dial (FM Frequency Linear Type)
5. FM De-emphasis Built-in Change-over Switch
6. 22-Step Detent Volume