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Penanenes
11. ADJUSTMENTS
11.1
MECHANICAL
ADJUSTMENTS
Prior to Adjustment
Clean
the both
reel base, the capstan and the
pinch
roller
with
an
alcohol
moistened
swab.
Pinch Roller Pressure Adjustment
1.
Put
the
tape deck
into
the playback
mode.
2.
Gently push against the pinch roller arm with
the tension gauge and separate the pinch roller
slightly from the capstan.
38.
Then the pinch roller back onto the capstan,
and read the value when the pinch roller starts
to rotate.
If the reading
fails to lie within
300g~ 500g, replace the pinch pressure spring.
Tension gauge
Pinch roller
Fig. 11-1
Pinch roller pressure adjustment
Reel Base Torque Adjustment
Measure
the
torque
with
the
torque
meter
during playback,
fast forward
(FF) and rewind
(REW) modes. The measured values should normal-
ly lie within
the allowable
ranges listed in the
table 1.
If the measured values lie outside the relevant
ranges, replace the TU (take-up) reel base assembly
and/or supply reel base assembly, TU idler, or drive
arm full assembly.
Table 1
REW mode
75 — 1359.cm
* Denotes back tension torque.
CT-501,450,405 >
Tape Speed Adjustment
1.
Connect
the frequency
counter
to the LINE
OUTPUT
terminals.
"2. Play back the 3kHz portion of the STD-301
test
tape.
At
the
beginning,
the
frequency
should
be
lie within
the
3000Hz~3010Hz
range,
and
may
be
adjusted
by turning
the
semi-fixed resistor located in the capstan motor
adjustment hole as shown in Fig. 11-2.
NOTE:
Tape speed is increased by turning the semi-fixed resistor
clock-wise,
and
decreased
by turning counter-clockwise.
REC Switch Adjustment
1.
Depress REC
button. REC action lever moves
to
A
direction.
At
this
time,
check
that
REC switch is ON.
2.
Depress
STOP
button.
The REC action lever
moves
slightly to
B
direction.
At this time,
bend and adjust the REC action lever so that
a contact
distance
of REC
switch
is 0.2~
0.5mm.
Decrease
@:- 9
Increase
he
;
\\ 0.2—0.5mm
\
REC action plate
© screwdriver |
Fig. 11-2
Tape speed and REC switch adjustmen
25
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