Akai GX-77

SECTION 1
SERVICE MANUAL
TABLE OF CONTENTS
SPECIFICATIONS 5.3 f0:3h 0 site ives fota no AM EA, ei teca a Na Se sei
DISMANTLING OF UNIT... 2.0.0.0... ee ee ee ens
CONTROLS © i532, 505 tiny eSieeals BS eters era BALE Gene ote Ges BE a
PRINCIPAL PARTS LOCATION ............ 0... 0c cee ee eee eee
VOLTAGE AND CYCLE CONVERSION. ............. 0.000220 ee
1. VOLTAGE CONVERSION ........... 0.0.0 cece eee eee
2. CYCLE CONVERSION }j oo sscis a ceed i ee wens Me Ewe ae
VI. OPERATING PRINCIPLES ............ 2.0.0 cece eee eee
1. TIMING CHART OF EACH MODE ............. 2.200000 e eens
2. EXPLANATION OF EACH MODE............... 000000 e ee eee
3. EXPLANATION OF EACH CIRCUIT ................0 0.00005,
VII. MECHANISM ADJUSTMENT ......... 0.00. ccc cece ee eee eee
1. BRAKE BAND POSITION ADJUSTMENT AND
BRAKE TENSION ADJUSTMENT ...........
2. PLAY PLUNGER POSITION ADJUSTMENT .................45.
3. PINCH ROLLER PRESSURE ADJUSTMENT ...............--..
4. TENSION SERVO ADJUSTMENT ............ 0... eee eens
5
6
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. LOADER PLUNGER POSITION ADJUSTMENT .................
. TAPE SPEED ADJUSTMENT .... 2... 0... cece ees
. HEAD ADJUSTMENT ... 10... 0... cc ec ee eens
AMPLIFIER ADJUSTMENT .... 2.0.2... cc ccc ee eens
DC RESISTANCE OF VARIOUS COILS ........... 0.0.2. ee eens
CLASSIFICATION OF VARIOUS P.C BOARDS ................06.
1. P.C BOARD TITLES AND IDENTIFICATION NUMBERS...........
2. COMPOSITION OF VARIOUS P.C BOARDS ............-....---
HeR
For basic adjustments, measuring methods, and operating principles, refer to GENERAL TECHNICAL
MANUAL.