Akai GX-77 Service Manual

een
ne
reer
Sh
SSSGSesnettnene?
1. TIMING
CHART
OF
EACH
MODE
1) Loading, Unloading Mode (Refer to Fig. 7)
LOADING and UNLOADING do not work during
FWD,
FWD/REC,
REV,
REV/REC,
FF
and
RWD
and during loading or unloading.
The
loader
PLG
can
be
pulled
many
times
by
turning
the
operation
“loader”
ON
while
SW905
(loader)
is
ON
(IC1
@8
will
be
“H”).
If
the
loader
SW
is
pressed,
G8
will
be
“H”
for
about
0.2
sec.
and
then,
TR35,
36
ON
and
the
loader
PLG,
SW905
ON
and
the
gear
of
the
capstan
flywheel
will
be
engaged
with
the
loading
gear,
and
the
loading
arm
is
lifted
by
the
rotating
1C-1 LOADER OUT
nee ae ee
ABOUT_!.5sec are
power
of
the
loading
gear,
i.e.,
the
rotating
move-
ment
is
changed
into
the
linear
movement.
After
loading, the
loading
gear
makes
one
turn
to
return
to
the
original
position
and
the
link-up
with
the
flywheel
will
be
off.
2) Timer Start Off (no tape) SW904 (tension off)
(Refer to Fig. 8)
If the operation loader key or FWD, REV, FF or
RWD is turned ON, IC1 @§ becomes “H” to
pull the loader PLG and then, the loader gear is
rotated, SW903 (motor SW) ON, and the right and
left reel motors are rotated.
18:5¥, 1 hin !
\ O.2sect
UNLOADED
MODE
fos
(+
|
1
a
A
Sw-9
05
LOADING (LOADER)
OPERATION ON"
LOADER SW "
Fig. 7
iFWOD LED,ON" SW904 (LOADER)
yon" SW904 OFF"
| FWO LED FLASH i lLoapinel |
|
I !
| 4TIMES (UNLOADED MODE) , LOADING y | FINISH | UNLOADING UNLOADED ,
POWER,,ON"
| \
l
!
COUNTER | 00:00
|
|
REEL MOTER F@! ALL L
|
REEL MOTER L((3)| ALL L
12
I
I
|
|
| i
|
|
|
I
TR2
|
|
1 |
( AUTO-STOP) I
ALL ON (olso 012)
FWD,,ON"
|
|
|
|
|
!
|
|
!
|
|
|
| 1
I |
| wl O.2sec we
|
J
|
H
I
|
|
|
|
|
|
|

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