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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 18th Apr 2024, 7:37 pm   #1
IanNVJ35
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Default Panasonic FJ760 white dots on image

I have on the bench one of these VCR's from around 2000 - Z mechanism.

It has a fault that also plagued the FJ710 and 765 models, namely white dots on playback over tge image.

Now I remember years ago some bulletin about this, something to do with grounding two parts together, but I cannot find it now.

If anyone remembers it would be much appreciated as it's an otherwise excellent machine in good order. Just the 'sparks' going across in twos at an angle do spoil it.

Cheers.
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Old 18th Apr 2024, 8:48 pm   #2
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Default Re: Panasonic FJ760 white dots on image

Panasonic NVFJ610

Quote:
We've had several of these and similar models with the
complaint of static 'blips' on the playback picture. In some
cases the cure has been to clean the PCB land that earths the
metal bottom panel. Some however can be dealt with properly
only by replacing the earthing brush that's buried under the
upper drum. Panasonic has available a rather expensive
conductive oil with which to anoint the shaft. E.T.
C/O TV Magazine
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Old 18th Apr 2024, 8:50 pm   #3
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Default Re: Panasonic FJ760 white dots on image

Brilliant. That was it. Now to have a go!
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Old 18th Apr 2024, 10:28 pm   #4
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Default Re: Panasonic FJ760 white dots on image

You can see the dirt and failed connection. Cleaned and re-flowed.
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Old 20th Apr 2024, 9:26 am   #5
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Default Re: Panasonic FJ760 white dots on image

Just to add one more point. I sourced some conductive oil at a local hobby shop (its rail lubricant Peco PL-64 - £10 for around 7ml) and cleaned and lubricated the head shaft. The anti static brush was perfect condition. The image quality is now perfect without a single dot. So this is worth doing if you have the dots.
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Old 20th Apr 2024, 11:03 am   #6
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Default Re: Panasonic FJ760 white dots on image

Glad you got it sorted
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