Akai GX-77 Service Manual

2. PLAY PLUNGER POSITION
ADJUSTMENT (Refer to Fig. 33)
{
With
FWD
PLAY
mode,
adjust
the
FWD
plunger
MOEA
position
with
the
screw
(a)
so
that
the
clearance
(A)
of
the
slide
play
will
be 0.1
+
0.3
mm.
Also
adjust
the
REV
plunger
position
in
the
same
way
in
REV
mode.
3. PINCH ROLLER PRESSURE ADJUSTMENT
With FWD PLAY mode, connect a 1 kg spring gauge
to the right pinch roller cap. Pull down the pinch
roller and then let it slowly move back.
Check that the spring gauge reads 850g + 100g at
the moment the pinch roller touches the capstan and
starts rolling.
If it reads otherwise, replace the P spring (See Fig. 33)
Also make the same adjustment about the left pinch
roller in REV mode.
Fig. 32
REEL PULLY
A: 01 to G3mm SPRING
PLAY SLIDE
PINCH ROLLER
(RIGHT)
FWD PLUNGER

Akai GX-77 Specifications

General

Track System	4-track, 2-channel stereo
Tape Speed	3 3/4 ips, 7 1/2 ips
Wow and Flutter	0.03% (19 cm/s)
Heads	3
Motors	3
Dimensions	440 x 244 x 358mm
Inputs	Line input (RCA)
Outputs	Line, Headphones