Akai GXC-750

1. KICK MECHANISM
1) Keyboard Block release from FWD playback mode
(Refer to Figs. 29, 30)
(REV. SELECTOR at NON —)
a) When FWD playback ends and the tape stops,
the system control circuit (Refer to SYSTEM
CONTROL CIRCUIT OPERATION, Section
IX) is activated and Stop Plunger Solenoid
SL1 operates.
b) When Stop Plunger Solenoid SLI operates,
drive lever (1) which is interlocked with the
stop plunger solenoid and the drive slide are
momentarily pulled downward. (Refer to
BASIC FUNCTION OF KICK MECHANISM,
Fig. 29)
At this time, the flywheel kick pin kicks the
pulled down drive slide and the drive slide
moves in left direction.
c) When this happens, drive levers (2) and (3)
which are interlocked with the drive slide
works as shown in Fig. 30, the drive lever (3)
selector pin kicks the stop slide, and the kicked
stop slide depresses the stop lever, causing the
Keyboard Block to release and the machine to
“enter STOP mode from FWD mode.
NOTE: At recording mode, keyboard Block
release function works in the same way
as described above.
2) Keyboard Block release from REV playback mode
(Refer to Figs. 31 and 37)
(REV. SELECTOR at NON—+)
a) When REV playback ends and the tape stops,
the system control circuit (Refer to SYSTEM
CONTROL CIRCUIT OPERATION, Section
IX) is activated and Stop Plunger Solenoid
SL1 operates.
b) At this time, as shown in Fig. 31 drive lever (3)
must move further to the right than in the
case of FWD playback. (This is because as
shown by the reverse side, Fig. 31, the head
plate slide and mode slector operation by
menas of the switch is the result of this move-
ment to the right). This operation is for the
purpose of not allowing drive lever (3) selector
pin to depress the reverse slide.
c) When Stop Plunger Solenoid SL1 operates,
drive lever (1) interlocked with the plunger
plate and the drive slide, are momentarily
pulled downward. (Refer to Fig. 29) At
this time, the flywheel kick pin kicks the
pulled down drive slide and drive slide moves
in right direction.
d) When this happens, drive levers (2) and (3)
which are interlocked with the drive slide
work as shown in Fig. 31 and drive lever (3)
selector pin kicks the stop slide and the kicked
stop slide depresses the stop lever, causing the
Keyboard Block to release and the machine to
release and the machine to enter STOP mode
from REV mode.
3) Keyboard Block release from FWD —REV mode.
(Refer to Fig. 32)
(REV. SELECTOR at SINGLE >)
a) When FWD recording or playback ends and
the tape stops, because the REV Selector
is set to SINGLE => and drive lever (3) is
right above the reverse slide as shown in
Fig. 32, drive lever (3) selector pin depresses
the reverse slide by means of the basic function
of the kick mechanism (Refer to Fig. 29).
b) The reverse slide operates switch slides (1),
(2), and (3), the switch operates the head
plate slide, and the head is raised, (Refer to
Fig. 38) thus effecting REV mode.
c) When set to REV recording or playback mode,
drive lever (3) selector pin is brought to and
stabilized directly above the stop slide by
means of the Mode Selector (Refer to Fig. 31).
d) When REV tape travel ends, drive lever (3)
selector pin depresses the stop slide and the
Keyboard Block is released.
e) At this time, the right hand take up friction
roller separates from the FWD flywheel, the
left hand take up friction roller contacts the
REV flywheel shaft, and revolutions begin in
REV direction.
4) REV—>FWD-—>REV (Refer to Fig. 33)
(REV SELECTOR at CONTG 3)
* For mechanism change from FWD to REV,
refer to Item 3) and Fig. 32.
a) When REV mode was effected from FWD
mode as shown in Fig. 33, drive lever (3)
selector pin moved to directly above the reverse
slide. At the end of REV mode, when con-
tinuous kick operation begins the selector pin
depresses the reverse slide and switch slides
and switch slides (1), (2), and (3) change to
FWD position.
Movement of slide switches (1), (2), and (3)
is indicated by the -—~line in Fig. 33.
b) Switch slides (1), (2) and (3) operate the head
plate slide and the head is lowered, thus
effecting FWD mode.
c) At this time, the left hand take up friction
roller sepearates from the REV flywheel, the
right hand take up friction roller contacts the
FWD flywheel shaft and revolutions begin in
FWD direction.
NOTE: For Reverse Selector operation in Item
1) through.4), refer to Fig. 37 and
for head raising and lowering mechanism
function, refer to Fig. 38.
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