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10.5
PLAY TORQUE ADJUSTMENT
@ Connection Diagram
OOCO000000090
Gain
To Adjust
1. Playback
a regular
cassette
tape (such as C-60), and
41
adjust VR4
(forward)
and VR3
(reverse) to obtain a
reading of 4.0V + 0.2V in the DC voltmeter.
. Using a cassette
type torque
meter
(120g-cm),
check
that the forward
and reverse torque
lies between
35
and 44g-cm.
vRIQ Qvr3
tt
Servo
VR4
aa,
(Reverse Side) |
VR3
VRI
DC V Meter
PLAY
Torque '
etait
e
CONTROL UNIT
Fig. 45
10.6
SERVO GAIN ADJUSTMENT
@ Connection Diagram
(Shown in Fig. 45)
® To Adjust
_
3. Rewind the table back to the beginning of the recorded
signal
section,
and
then
take the tape out and
reload
it in reverse.
4. Play the tape
in reverse
at the MS
speed and
adjust
VR1
to again obtain a reading of 2,200Hz + 30OHZz in
the frequency counter.
reverse directions.
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