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6—4. Mechanism Adjustment
1. Pinch roller pressure
(Fig. 15)
Standard pressure:
350 ~ 450 g
If the pressure is not as specified, adjustment should
be made by replacing the spring
or by changing
the spring position.
2. Take-up torque
(Figs. 15 and 16)
Standard torque:
40 ~ 70 gr.cm
If not as specified,
1) Replace the take-up idler arm (6).
2) Replace the take-up idler arm pressure spring.
3) Clean or replace the take-up belt @.
4) Clean the right-side reel rubber outer surface, or
replace the reel rubber.
3. Fast forward torque
(Fig. 15)
Standard torque:
75 gr.cm or more
If not as specified,
1) Clean theright-side reel rubber outer surface, or
replace the reel disc ass'y @1) .
2) Clean the fast forward
tire and idler, or replace
the fast forward idler ass'y @2.
3) Clean the flywheel outer surface and belt.
4. Rewinding torque
(Fig. 15)
Standard torque:
75 gr.cm or more
If not as specified,
1) Clean
the left-side reel rubber
outer surface, or
replace the reel disc ass'y @3).
2) Clean the rewind tire @4.
3) Clean the flywheel outer surface and belt.
7. Auto-Ejector
7—1.
Theory of Detecting the Stop of Tape
As illustrated in Fig. 17, the turning force of the disc
on
the
take-up
side is carried to the counter,
by
which the toothed plate integrated with the counter
pulley is turned.
The plate is provided with the CdS
detector element on the upper side and the lamp on
the lower side.
As the plate turns, the CdS detector
element radiation is shut by the teeth of the rotating
plate.
Thus the radiation goes on and off quickly and
transmits an AC signal to the subsequent circuit as a
detecting signal.
Counter belt
Gear plate
CdS element
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