Sony ST 88 Service Manual

Page 2

Section

TABLE OF CONTENTS

Title Page

TECHNICAL DESCRIPTION
1-1. BlockDiagram ............................. 1

DISASSEMBLY AND REPLACEMENT

2-1. Wooden Case Removal ......................... 2
2-2. Front Panel Removal ........ 2
2-3. Front Subchassis Removal ....................... 2
2-4. Fm (A-m) Front-End/I-f Amp/MPX and

Preamplifier Board Removal ...................... 3
2-5. Power Supply Board Removal . . . . 3
2-6. Dial Cord Restringing ......................... 3
2-7. Dial Lamp Replacement ...... . .................. 4
2-8. Tuner Input Meter Replacement .................... 4
2-9. Band, Mode, Afc and Power Switch Replacement ........... 4
2-10. Chassis Layout ............................. 5
ALIGNMENT AND ADJUSTMENT
3-1, Fm l-f and Discriminator Alignment .................. 6
3-2. Fm Frequency Coverage and Tracking Alignment ........... 7
3-3. Fm Stereo Separation Adjustment ................... 8
3-4. A-m 1-! Strip Alignment ........................ 9
3-5. A-m Frequency Coverage and Tracking Alignment .......... 9
REPACKING ............... . .................. ll
DIAGRAMS
5-1. Mounting Diagram - Power Supply and Attenuator Boards ...... 13
5-2. Mounting Diagram - Fm (A-m) Front-End/I-f Amp/MPX

and Preamplifier Board ........................ 14
5-3. Schematic Diagram ........................... 15
EXPLODED VIEWS ............................. 17
ELECTRICAL PARTS LIST ........................ 19

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