Akai AT S55 AT S55 L Service Manual

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AT-SSS/L

AM-USS/J

FM/ AM QUARTZ SYNTHESIZER TUNER

MODELAT-S55/ L

STEREO INTEGRATED AMPLIFIER

MODELAM-USS/J

THIS MANUAL IS ALSO APPLICABLE TO BLACK PANEL MODELS

SECTION 1 MODEL AT-SSS/L SERVICE MANUAL ..... 3
SECTION 2 MODEL AM-US 5 / J SERVICE MANUAL ..... 25
SECTION 3 PARTS LIST .......................... 49

SECTION 4 SCHEMATIC DIAGRAM ................. 61

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SECTION 1

SERVICE MANUAL

MODEL AT-555/L

TABLE OF CONTENTS

I. SPECIFICATIONS . . ....................................................... 4
II. DISMANTLING 0F UNIT .................................................... 5
III. CONTROLS ............................................................. 6
IV. PRINCIPAL PARTS LOCATION ............................................... 7
v. VOLTAGE CONVERSION ................................................... 8
VI. ADJUSTMENTS .......................................................... 9
1. AM (AT-SSSL: MW) SECTION ADJUSTMENTS ................................... 12
2. Lw SECTION ADJUSTMENTS ............................................... 13
3. FM SECTION ADJUSTMENTS ................................ - ............... 14
VII. CLASSIFICATION OF VARIOUS P.C BOARDS ..................................... l6
1. P.C BOARD TITLES AND IDENTIFICATION NUMBERS ............................ 16
2. MODEL AT-SSS ; COMPOSITION OF VARIOUS P.C BOARDS ......................... l7
3. MODEL AT-sssL; COMPOSITION OF VARIOUS RC BOARDS ........................ 21

For basic adjustments, measuring methods, and Operating principles, refer to GENERAL TECHNICAL
MANUAL.