Sharp GF-9090H User Manual

= TORQUE MEASUREMENT AT PLAY, FF AND REWIND MODES
(Refer to Figure 18)
1.
Mount
a
torque
measuring
reel
on
the
reel
support
(that
is,
it
is
placed
on
the
take-up
turntable
support
at
PLAY/
REWIND
mode
while
on
the
supply
turntable
support
at
REWIND
mode).
2.
Then
gradually
release
the
tension
gauge
and
read
it
when
the
rotational
speed
of
the
reel
support
becomes
almost
constant.
3.
Measured
torques
at
each
mode
should
be
as
tabulated
below.
Note:When the take-up turntable support is stopped at
PLAY mode, there should be no slip between the
take-up turntable support and take-up slip roller
and/or between the drive belt and take-up slip roller.
TURN TABLE
MEASURING —__20(25/32")
REEL
TENSION
GAUGE
MEASURED TORQUE
35~ 60 gr.cm
70 ~ 100 gr.cm
70 ~ 100 gr.cm
REWIND
Figure 18
= GAP ADJUSTMENT BETWEEN MOTOR SWITCH AND BRAKE LEVER
(Refer to Figure 19)
1. Under each of PLAY, FF, and REWIND modes, make
ascertain that the motor switch (SW504) is turned “ON”
without fail.
2. When the motor is in a stop, check that the gap (A) between
the brake lever and the motor switch (SW504) is 2 mm to
3 mm.
3. If the steps 1 and 2 above are still insufficient for the
adjustment, the gap can be adjusted by positionally
changing the two soldered terminals of motor switch
(SW504) located at the motor PWB with use of a soldering
iron.
MOTOR SWITCH (SW504) __
BRAKE LEVER
OPERATION CHECK OF PAUSE MECHANISM
(Refer to Figure 42, Page 29)
Set the unit in PLAY mode by pushing the key given a mark
( <q ). Then slowly push the PAUSE key and make ascertain
that the take-up idler (028) and the pinch roller (090) come
off respectively from the take-up turntable support (081) and
the flywheel shaft almost at the same time and check that
each of the two gaps thus produced is about 0.5 mm.
TURNTABLE
Figure 19
@ ADJUSTMENT OF PLUNGER SETTING POSITION
(Refer to Figure 20)
1. Under FF mode, loosen the plunger retaining screw,
hold up the part @) of the plunger by hand and while
keeping the plunger in contact with the lock shaft,
retighten the plunger retaining screw.
2. After the step 1, make sure of the following.
«Check that each of the PLAY, FF (CUE), REWIND
(REVIEW) keys can be locked smoothly.
- Check that the FWD-APSS key and REV-APSS key
can be locked smoothly and they further be released
when the plunger operates.
- Check that the plunger can start to operate smoothly
when the STOP key is pushed to release the APSS
keys.
3. After the step 2, the adjustments are not yet sufficient,
again carry out the step 1.
PLUNGER ADJUST SCREW
LOCK SHAFT
PLUNGER _
Figure 20
10

Sharp GF-9090H Specifications

General

Brand	Sharp
Model	GF-9090H
Category	Stereo System
Language	English