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Check
ing the torque and operating force
Item to be measured
Standard value
Remarks
Driving torgue
35 ~ 60g-cm
Fast farward torque
65 ~ 90g-cm
Rewind torque
60 ~ 90g-cm
Less than 6g-cm
Counter belt provided
| Take-up side bock tention
Take-up side bock tention
Take-up side bock tention
125 ~ 4g-cm
Counter belt not provided
1.5 ~ 3.5g-cm
Pinch roller compression force
350 ~ 500g
Note (1)
Drive roller compression force
130 ~ 250g
Note (2)
Playback opelation force
Less than 2kg
Fast forward operation force
Less than 2kg
Rewind operation force
Less than 2kg
Cur force
Less than 2kg
Less than 2kg
Less than 1.5kg
Stop operation force
Note 1:
Note 2:
Recording operation force
Pinch-roller compression force (350 ~ 500g)
The sector tension-gauge under the playback con-
dition is shown
in Fig. 22. Apply a force in the
direction of the arrow and take the reading of the
tension gauge when the rotation of the pinch-roller
has stopped.
Pinch-roiler arm
Copstan
300~500g
Fig. 22
ye
Fig. 23
—10-—
Less than 1.5kg
Less than 0.5kg
Note 3:
Note 4:
Note 5:
Pause operating force (less than 800g)
Apply the bar type tension-gauge to the end of the
rec/playback plate as shown in Fig. 24 under the
playback condition. Apply a force to the tension-
gauge and press the rec/playback plate as far as it
will go and return it gradually, then when the end
of the rec/playback
plate comes
to a position
3.5mm
from
the
end
of the chassis take
the
reading of the tension gauge.
Pause
slider
3.5mm
4—
Rec/playback plate
Less than 800g
Fig. 24
Place the chassis vertically and apply a force at the
normal
speed for use, using the bar type tension-
gauge, and take the reading at that time.
Place the chassis vertically and take the reading of
the tension-gauge when a force is applied at the
normal
speed for use (it should be in the normal
cueing or reviewing condition with the knocking
sound being generatied).
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