Akai VS-2EGN

SECTION 1
SERVICE MANUAL
TABLE OF CONTENTS
I. SPECIFICATIONS
Ul. OPERATING PROCEDURE
1, RECORDING
9° PLAVYBAGR asic ees ah aici
Ill. DISMANTLING OF UNIT .......
IV. CONTROLS ............-.5-
V. PRINCIPAL PARTS LOCATION
VI. VOLTAGE CONVERSION ...........
VII, CIRCUIT DESCRIPTION
1, GENERAL
2, VS-2EGN VIDEO CIRCUIT OPERATION
3, SERVO CIRCUIT OPERATION
4, MECHANISM DRIVE OPERATION
5, OPERATION CIRCUIT
6.
7
8
9
. THE POWER/SYSCON CIRCUIT
. AUDIO/VIDEO PRE-AMP CIRCUIT
. BOOSTER CIRCUIT
. RF CONVERTER FUNCTIONS AND CIRCUITS
10. TV TUNER (FRONT END) FUNCTIONS AND CIRCUITS . .
11, DEMODULATOR FUNCTIONS AND CIRCUITS
VIII. MECHANICAL ADJUSTMENTS ...........-..--
1. TENSION LEVER POSITION ADJUSTME
2. BACK TENSION ADJUSTMENT ... Lara pant
3. CHECK THE VARIOUS TORQUES ............-
IX. REPLACEMENT OF VIDEO HEAD ASSEMBLY
X. TAPE TRANSPORT ADJUSTMENT
1. TAPE GUIDE HEIGHT ADJUSTMENT
2. GUIDE ROLLER HEIGHT ADJUSTMENT
3. AUDIO/CONTROL HEAD HEIGHT, TILT AND AZIMUTH ADJUSTMENT .........-...-- 103
4, CONTROL HEAD POSITION ADJUSTMENT . .. 2... 6-6 eee ee eee
5, ADJUSTMENT OF QUICK FINDER (REVIEW) RUN ...
XI. ELECTRICAL ADJUSTMENT
1, SERVO P.C BOARD ADJUSTMENT
2. VIDEO (EGN) P.C BOARD ADJUSTMENT
3. EGN P.C BOARD ADJUSTMENT
4, AUDIO/PRE P.C BOARD ADJUSTMENT
5. DEMODULATOR P.C BOARD ADJUSTMENT
XII. VARIOUS WAVEFORMS AT EACH TEST POINT ..
1. SERVO P.C BOARD . .
2. VIDEO P.C BOARD
3. EGNP.C BOARD ....
XII. P.C BOARD TITLES AND IDENTIFICATION NUMBERS
XIV. COMPOSITION.OF VARIOUS P.C BOARDS
For
basic
adjustments,
measuring
methods,
and
operating
principles,
refer
to
GENERAL
TECHNICAL
MANUAL.
Service Manual VS-2EGN