Hi
As I am long retired from the TV repair business I am having trouble
diagnosing the following problem on my Thomson VCR mod R7000.
When a cassette in inserted and without any functions activated the
unit turns itself off.I emphasise no play or FF/RWD/Search or any
other command is entered,merely the inserting of the cassette trips
it off after a few seconds.If no cassette is inserted the unit stays
on.
I have the service manual and will strip it down on Monday but would
appreciate any tips re.this fault before I do.
Needless to say since I sold up ten years ago all my fault database
went with it and I really can't remember this fault.Thanks for any
input.Harry

Harry:
More than likely there is a problem with a jammed loading mechanism....
gear?, cam?, slipping belt?, foreign debri in the VCR such as: a paper
tape label that has fallen off of a cassette and gotten inside the VCR?
paper clip? pencil? pen? ... or could be a faulty mode switch?.... or
even a bad cassette, try another.
What you described in your post is predictable and expected:

" When a cassette in inserted and
without any functions activated the
unit turns itself off.I emphasise
no play or FF/RWD/Search or any
other command is entered,merely
the inserting of the cassette trips
it off after a few seconds.If no
cassette is inserted the unit
stays on."

The reasons this is so is if the record protect tab is broken out of
the cassette shell (i.e.: a commercially recorded tape) the VCR will
automatically TURN ON POWER and go into PLAY mode when the cassette is
inserted without pushing any buttons. If the record protect tab is not
broken out (i.e.: a blank tape) then when the cassette is inserted the
VCR will automatically TURN ON POWER and load the tape around the heads
and wait in STOP mode.
Either way, if the loading mechanism is jammed or has some other
related fault, the VCR will automatically turn itself off moments after
the cassette is inserted and the loading mechanism fails to complete
it's cycle.
electricitym
- - - - -

On 13 Aug 2005 14:01:03 -0700, wrote:

Harry:
More than likely there is a problem with a jammed loading mechanism....
gear?, cam?, slipping belt?, foreign debri in the VCR such as: a paper
tape label that has fallen off of a cassette and gotten inside the VCR?
paper clip? pencil? pen? ... or could be a faulty mode switch?.... or
even a bad cassette, try another.
What you described in your post is predictable and expected:
[snip]
Thanks for the info,it's been tried with a couple of cassettes,still
the same.Funny thing is if I use the remote it trips off,sometimes if
I use the main panel switches it stays on. An Infra Red sensor may be
causing it but from memory it's not likely.
As said I have the service manual so it means dragging the scope out
of the loft ang getting to work.Never could stand these intermittent
faults when in the business!Thanks again for the info,I'll check those
out.Regards

Harry Collingwood:
You don't need your scope or the service manual for this.... just yet.
Open'er up and check the things I told you about in my previous reply
posting.
If the IR sensor was bad as you postulated then the tape would probably
not be accepted and start going in when inserted... although you should
probably check the emitter and sensors while you are in there if all
else checks out.
electricitym
- - - - - - -


Harry Collingwood wrote:

Thanks for the info,it's been tried with a couple of cassettes,still
the same.Funny thing is if I use the remote it trips off,sometimes if
I use the main panel switches it stays on. An Infra Red sensor may be
causing it but from memory it's not likely.
As said I have the service manual so it means dragging the scope out
of the loft ang getting to work.Never could stand these intermittent
faults when in the business!Thanks again for the info,I'll check those
out.Regards

On Sat, 13 Aug 2005 19:53:29 GMT, (Harry
Collingwood) wrote:

Hi
As I am long retired from the TV repair business I am having trouble
diagnosing the following problem on my Thomson VCR mod R7000.
When a cassette in inserted and without any functions activated the
unit turns itself off.I emphasise no play or FF/RWD/Search or any
other command is entered,merely the inserting of the cassette trips
it off after a few seconds.If no cassette is inserted the unit stays
on.
I have the service manual and will strip it down on Monday but would
appreciate any tips re.this fault before I do.
Needless to say since I sold up ten years ago all my fault database
went with it and I really can't remember this fault.Thanks for any
input.Harry

Isn't there a familiar Thomson VCR problem like this that requires 5
or 6 electrolytics, including one bipolar, to be replaced? No,
sorry...a diode kit of some sort?

Tom

On Sun, 14 Aug 2005 14:20:56 GMT, Tom MacIntyre
wrote:

On Sat, 13 Aug 2005 19:53:29 GMT, (Harry
Collingwood) wrote:

Hi
As I am long retired from the TV repair business I am having trouble
diagnosing the following problem on my Thomson VCR mod R7000.
When a cassette in inserted and without any functions activated the
unit turns itself off.I emphasise no play or FF/RWD/Search or any
other command is entered,merely the inserting of the cassette trips
it off after a few seconds.If no cassette is inserted the unit stays
on.
I have the service manual and will strip it down on Monday but would
appreciate any tips re.this fault before I do.
Needless to say since I sold up ten years ago all my fault database
went with it and I really can't remember this fault.Thanks for any
input.Harry

Isn't there a familiar Thomson VCR problem like this that requires 5
or 6 electrolytics, including one bipolar, to be replaced? No,
sorry...a diode kit of some sort?

Tom
Thanks for that and the previous posters contribution.
I am not aware of any mod kit being out of the business for a good
while but going by previous repairs there were not many units that did
not require a mod kit, even now, as with Sat receivers.
I'll do a Google search and see what fires up.Thanks again.