Akai GX-630D Service Manual

SECTION 1
SERVIGE MANUAL
TABLE OF CONTENTS
L
SPECIFICATIONS
…
eee
II.
DISMANTLING
OF
UNIT
0e
eneen
ee
III.
ARRANGEMENT
OF
PRINCIPAL
PARTS
…….…..……….
oee
eee
eee
IV.
MECHANISM
ADJUSTMENT
eneen
_
POSITION
ADJUSTMENT
OF
BRAKE
SOLENOID
SL-2
.........
.
BRAKE
TENSION
ADJUSTMENT
.…....
oee
_
POSITION
ADJUSTMENT
OF
PINCH
ROLLER
SOLENOID
SL-l
.…...
‚
PINCH
ROLLER
PRESSURE
ADJUSTMENT
.….........
en
‚
CAPSTAN
SHAFT
LOOSE
PLAY
ADJUSTMENT
nn
.
IMPEDANCE
ROLLER
LOOSE
PLAY
ADJUSTMENT
.…............
.
TAPE
GUIDE
HEIGHT
ADJUSTMENT
neee
.
REEL
TABLE
HEIGHT
ADJUSTMENT
…….…......
eee
_
INSTALLATION
POSITION
ADJUSTMENT
OF
JOINT
B
...........
V.
HEAD
ADJUSTMENT
.........--n
eee
eee
eeen
VI.
AMPLIFIER
SYSTEM
ADJUSTMENT
...........e
ee
eee
1.
D.C
POWER
SUPPLY
VOLTAGE
ADJUSTMENT
enn
2.
TAPE
SPEED
ADJUSTMENT
…......
neee
3.
RECORDING
AND
PLAYBACK
AMPLIFIER
ADJUSTMENT
(GX-630D)
4.
RECORDING
AND
PLAYBACK
AMPLIFIER
ADJUSTMENT
(GX-630DB)
5.
DOLBY
NOISE
REDUCTION
ADJUSTMENT
(GX-630DB)
....………
…
…
VIJL.
D.C
RESISTANCE
OF
VARIOUS
COILS
...
oee
VIII.
CLASSIFICATIONS
OF
VARIOUS
P.C
BOARDS
.…...............…
1.
P.C
BOARD
INTERCHANGEABILITY
CHART
...….
………
oe
2.
COMPOSITE
VIEWS
OF
VARIOUS
P.C
BOARD
.......….
senen
\D Oo ANWB W ND
vee eee eee ee ee ee
eee eee ee ee eee ee
For
basic
adjustments,
measuring
methods,
and
operating
principles,
refer
to
GENERAL
OPERAT-
ING PRINCIPLES AND ADJUSTMENTS.

Akai GX-630D Specifications

General

Track System	4-track, 2-channel, stereo/monaural system
Reel Size	up to 10.5 inch reel
Wow and Flutter	0.06% (7 1⁄2 ips)
Signal to Noise Ratio	58dB
Output	0.775V
Type	Reel-to-reel tape deck
Heads	3 (erase, record, playback)
Motor	2 x reel, 1 x capstan
Tape Speeds	3 3⁄4 ips, 7 1⁄2 ips