Re: JVC Mini DV camera Tape problem
- From: "Ulrik Smed" <ulsm@xxxxxxxxxxxxx>
- Date: Sat, 9 Aug 2008 01:14:30 +0200
Ulrik Smed wrote:
I'm really puzzled now, I just tried to fool the drive to think a
tape was inserted by covering the tape end sensors with my fingers
while closing the tape compartment. It spins the drum, loads the (not
present) tape and makes its initial short reverse running as if there
was a tape inserted. But now the break on the right tape wheel IS
activated... :-S If it would just do that with a tape inserted too,
I'm sure it would work. Trying back and forth with tape and no tape
gives the same result every time, when a tape is present the break is
deactiveted and the tape trashes.
How can it tell the difference between a real tape and me cheating
the tape end sensors? Of course only one of the tape wheels rotate
when there is no tape (this stops the drive with a warning on the
monitor after a short while), but the break is activated even before
the capstan moves.
Heh, replying to my own post once again. :-)
I found the problem! There is a pin that sticks up and releases the breaks
inside the tape cassette when it loads. This is controlled by the same plate
that controls the right wheel break. When the pin was loaded by the spring
inside the cassette, it made the plate hang in a slightly wrong position and
thereby did not activate the right wheel break. This is why it all worked OK
without tape.
I fixed it by milling about a half millimeter off the little pin that moves
the wheel break away from the wheel, so the break came closer to the wheel.
This was enough to ensure the break was activated, even with the controlling
plate in the wrong position. It still deactivates OK, the clearance is just
a bit smaller than before, no problem here. So now it runs the tape nice and
tight backwards. :-)
--
Ulrik Smed
Aarhus, Denmark
.
- References:
- JVC Mini DV camera Tape problem
- From: Ulrik Smed
- Re: JVC Mini DV camera Tape problem
- From: Ulrik Smed
- JVC Mini DV camera Tape problem
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