Sharp 14VT10X1, Service Manual

Page: 17 / 138

CHECKING AND ADJUSTMENT OF TAKE-UP
CHECKING AND ADJUSTMENT OF TAKE-UP
TORQUE IN PLAYBACK MODE
TORQUE IN VIDEO SEARCH REWIND MODE
1.
2.
Remove the cassette housing control assembly.
Open the lid of the cassette torque meter, and
hold it with a pair of vinyl tapes.
Load a cassette torque meter the unit
Set value 95
Figure
Checking
The toraue fluctuates due to the rotational
Check that the torque is in the range of 95 30
deviation of the reel drive unit. Use the center of
the fluctuation as the value.
3. Place the unit in the SP record mode, and check
that the take-up torque is within the range.
l
Remove the cassette housing control assembly.
Push the play button to place Push the video
search
the playback mode. button to place the unit in the
video search rewind mode.
Torque gauge
Place the torque gauge on the supply reel
disk, and turn it
very slowly
lone every 2 to 3 seconds) and check
that the torque the set value
Supply reel disk
Figure l-32.
Note:
Set the torque gauge securely on the supply reel
disk. If it is not secure, the measurement will be
incorrect.
l
Adjustment
If the take-up torque in video search rewind mode
is outside the range, replace the supply reel disk.
Note
T h e t o r q u e f l u c t u a t e s d u e t o t h e r o t a t i o n a l
deviation of the supply reel disk. Use the center of
the fluctuation at the value.
l
Adjustment
If the take-up torque in the playback mode is
outside the range, replace the take-up reel disk.
N o t e : W e i g h t t h e c a s s e t t e t o r q u e m e t e r t o
prevent float.
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