Reel Lockoperation; Cylinderlock - Panasonic REV-1 Service Manual

8-10. Reel lock operation
When the Suuply or Take-up reel mechanism locks during the tape running, the following operation
is performed in order to protect the tape and the capstan driver.
In case of Take-up reel mechanism lock, the detecting time is defined depending on the mechanism
position and capstan speed to minimize the tape supplying from supply side.
FF/REW
: Unloading and loading. The unit goes to CUE/REV
mode.
PLAY/CUE/REV : Unloading till
the cassette down position and loading. The unit goes to STOP3
position.
In play and CUE/REV mode, the reel pulse cycle is started to count after the mechanism mode is
fixed.
In case the counted pulse cycle exceeds the defined value, the unit goes to
STOP mode
due to judge
that lock of reel mechanism is detected.
cThe value of reel lock detection time>
NTSC/SP mode PAUSP mode
-n
In FF/REW mode, the unit goes to CUE/REV mode and continues the tape running in the following
case.
1. (1) Take-up reel pulse can not be detected within 5 seconds after the unit shifted to REW mode.
(2) Supply reel pulse can not be detected within 5 seconds after the unit shifted to FF mode.
2.
The reel pulse can not be detected more than 2 seconds sequentially within 5 seconds after
completing the mechanism mode shift.
3. The reel pulse can not be detected more than 800 msec. past 5 seconds after completing the
mechanism mode shift,
8-11. Cylinder lock
<Start rotation>
When the cylinder neither start rotating nor go to the stability rotation within 5 seconds, it is unloading
under keeping the mode. In case the cylinder starts rotating and goes to the stability rotation, the
mechanism loads again and continues the holding mode.
If it is not possible, Power is turned off and cylinder trouble "HOI" is displayed.
<During rotation>
The head switching pulse is supplied to the cylinder when the cylinder starts the stable revolution. In
case the head switching pulse does not come to the cylinder within 0.5 seconds, the cylinder lock is
judged and the following operation is activated.
Timer REC mode: Power off
PLAY, REC mode: STOP (Mechanism shifts to MID. position and the unit goes to stand-by mode.)
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