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KD-A11A/B/C/E/J/U
|
Adjusting | Standard
point
value
Adjusting motor
Connect a speed meter to the LINE
Semi-fixed|
3000 Hz_ | If the speed meter functions as a wow
speed
OUT terminals. Play back the VTT-
resistor in
and flutter meter, also, connect the
656 test tape Adjust the semi-fixed
the motor
deck to the INPUT terminals of the
resistor in the motor until the read-
meter.
ing of the speed meter is 3000 Hz.
ass'y.
[111]
Repair of wow flutter
If wow and flutter increase, check the following points. If
tions.
there is defect in revolving parts, the wow and flutter gener-
Play a 3000 Hz test tape, and defective part can be detected
ated will increase in proportion to the number of revolu-
from the sound.
Replace flywheel.
Clean the capstan shaft in the flywheel.
Replace the capstan assembly.
Capstan shaft has excessive run-out.
Flywheel! turns heavily.
(shaft seisure, thrust play, etc.)
Pinch roller
Rough rotation (Deformation scratches, | Replace pinch roller, or pinch roller spring.
or dust)
Clean the pinch roller.
The angular position of the pinch roller
| Adjust the pinch roller so that it is parallel with the capstan shaft.
is not correct.
The pinch roller pressure is not correct.
Belt
Belt has undue run-out.
Check the belt.
Belt is dirty or slippery.
Replace the belt.
Back tension | Back tension is irregular, or back ten-
Replace back compression spring (under supply disc).
sion is too strong.
Motor
Motor shaft has undue run-out.
Replace motor.
Motor pulley is oily and dustry.
Clean motor pulley.
Capstan and
flywheel
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