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Fast Forward & Rewind Torque
1. Fast Forward Torque
In the fast forward mode, check that the F.F. torque is
within 60 to 130 g-cm by applying the torque gauge to
the take-up reel.
2. Rewind Torque
In the
rewind
mode,
check
that the rewind
torque
is
within 60 to 130 g-cm by applying the torque gauge to
the supply reel.
Thrust of Flywheel
The clearance
between
the top of flywheel
spindle and the
flywheel bracket should be within 0.1 to 0.3 mm.
If the clearance
is out of limits, adjust the adjusting screw
for normal value.
Note:
After adjustment, fix the screw with lock adhesive.
Adjusting Screw
0.1 ~0.3 mm
Fig. 9
Location of Heads
The
play/record
and
erase
heads should
be positioned
as
shown below in the playback mode.
Rec/Play Head
Erase Head
Guide Pin
Fig. 10
RC-250L/LB
Pressure of Pinch Roller
1. Setting the mechanism
vertically
in the playback
mode,
the pinch
roller should
stop turning
at the pressure of
380~450
g when
the pinch
rcller arm
has been pulled
upwards by tension gauge as shown in Fig. 11.
2. If the pressure
is out of limit, change
the pinch roller
spring.
Note: If the
pressure
is excessively
high, it may
cause
the noise from the pinch roller bearing and defec-
tive in wow and flutter. If the pressure is defective-
ly low, it may cause defective in auto stop motion
and in wow and flutter.
Tension Gauge
Pinch Roller Arm
Capstan
Pinch
Roller
Fig. 11
TAPE
SPEED
1. The
tape
speed
should
be within
2940
Hz
(—2%)
to
3090 Hz (+3%) by reference tape.
2. If the
speed
is out
of limit, adjust
it by inserting the
small screw-driver
into the adjusting hole of motor.
a.
If the speed
is less than
--2%
turn the driver clock-
wise.
b. If the
speed
is over
+3%,
turn
the driver
counter-
clockwise.
©)
O
Adjusting Hole
Fig. 12
No. 1409
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