Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old June 13th 21, 01:28 PM posted to sci.electronics.repair
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First recorded activity by DIYBanter: Sep 2009
Posts: 172
Default Panasonic PV-4800 VCR Timer Recording Issue

This VCR is plugged in when the record timer was set. There was NO loss
of power. Therefore, there was NO need for a battery (does NOT have one).

After the VCR failed to record at the appointed time, the time and date
was checked and was correct.


Doesn't matter.

If it does have some kind of power backup device, either battery or
supercap, after 35+ years it's probably chemically broken down and is likley
holding one of the lines to the cpu low.

You might think you are programming a record event but the cpu is ignoring
it.

If you are absolutely sure there is no such device, take my other
suggestion and go visit the nearest Salvation Army or Goodwill outlet store.

There are two of those on ebay now, one for $12.50 and the other for $20 (or
best offer) but of course there is $20 in shipping charges on either.

Overpriced.

Assuming everything else is working correctly and it is just a timer
problem, it's so unlikely to find a replacement clock/timer board these days
and probably priced at 10x what the machine is worth, there really is no
other solution except to replace the whole machine.

Hi Bruce,

Since I do not have the SM for this, and I have other VCRs that I can
use for Timer Recording, I will only use this VCR without the Timer
Recoding function.

Regards, John


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Old June 14th 21, 02:22 PM posted to sci.electronics.repair
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First recorded activity by DIYBanter: Nov 2018
Posts: 81
Default Panasonic PV-4800 VCR Timer Recording Issue

On Sat, 12 Jun 2021 17:16:58 -0000 (UTC), wrote:

wrote:

This VCR is plugged in when the record timer was set. There was NO loss
of power. Therefore, there was NO need for a battery (does NOT have one).

After the VCR failed to record at the appointed time, the time and date
was checked and was correct.


Doesn't matter.

If it does have some kind of power backup device, either battery or
supercap, after 35+ years it's probably chemically broken down and is likley
holding one of the lines to the cpu low.

You might think you are programming a record event but the cpu is ignoring
it.

If you are absolutely sure there is no such device, take my other
suggestion and go visit the nearest Salvation Army or Goodwill outlet store.

There are two of those on ebay now, one for $12.50 and the other for $20 (or
best offer) but of course there is $20 in shipping charges on either.

Overpriced.

Assuming everything else is working correctly and it is just a timer
problem, it's so unlikely to find a replacement clock/timer board these days
and probably priced at 10x what the machine is worth, there really is no
other solution except to replace the whole machine.


I still have a working VHS VCR. It has a stereo sound decoder,
Hi-Fi sound, half speed record and playback, NTSC playback
on PAL TV, G-Code programming, and on screen programming.

However, if I play a five hour tape it folds the top of the tape
over!(?) Three hour or less works OK.

-bruce



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