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1-4. V3 Mechanism Check Method
If the abnormal condition is caused by the mechanism
itself, analyze the cause according to the following
procedures.
1-4-1. External Appearance Check
(1) Check whether there are foreign matters or not inside
the VTR.
(2) Check whether the cylinder and the guides for tape
transport system are contaminated.
1-4-2, Motor Sensor System Check
Check whether some abnormalities are found in the motor
or the sensor system (including control circuits) according
to the flow chart.
The clearance of Ais allowable if it is within 3mm.
Does the loading motor
rotate without a cassette after
turning the power ON?
NO
———
Loading motor
abnormality
:
YES
NO
Cam SW: phase shift
Or
Gam SW abnormality
Does the cam gear angle
is made at standby position?
(Refer to Fig.4-1-1)
YES
Tape sensor abnor-
mality when loading the
cassette: holder.or
cassette holder loading
abnormality
After releasing
the lock lever, EJECT ope-
ration is performed soon after
pushing the cassette
holder?
NO
YES
Does the capstan rotate
during the above operation ?
YES
During the
above operation,does
the T reel table rotate when
the cassette holder goes down and
does the S reel table rotate
when the cassette
holder goes up?,
NO
Capstan belt and
Reel system. abnormality
YES
Reel sensor system is.
abnormnal: when the
cassette iS ejected with-
out revindiing tape'or
stopped ir the way of
unloatingg Operation... -
When inserting the
cassette with a safery tab,
is the cassette stopped at the
playback position after
detectingthe tape
remain.?
NO
YES
Sensors are normal.
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