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Old 11th Dec 2018, 1:44 pm   #1
Snarf81
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Default Philips VR6860 restoration.

Hi everyone.
I have a problem with my vcr and wondered if anyone has some advice on it please?

There is power getting to it and the main display lights up, it does all the tape transport functions, but, there is no picture or sound output from it by either scart or rf out. The audio level meters don't come on, and pre-recorded hifi tapes don't light up the hifi light on the main display whilst playing.

I'm thinking that it's missing some voltages somewhere?

Does anyone know where I can test for voltages with my multimeter please?

I don't want to dump the unit as it's rather nice looking. Haha.
Any help would be greatly appreciated.

Thanks,
Richard.
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Old 11th Dec 2018, 3:03 pm   #2
dazzlevision
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Default Re: Philips VR6860 restoration.

Take a look at post 15 in this thread.

https://www.vintage-radio.net/forum/...ad.php?t=98964

In the right hand picture, bottom right hand corner, The radial leaded “Philips” blue cased electrolytic with this case style were/are prone to go short circuit. I have had this in Philips VCRs of your machine’s generation.

If that has happened, it may have either blown a fuse or open circuited a fusible resistor.

To check, you’d need a circuit diagram of your VCR, to see which dc supplies have this type of capacitor connected across them.

Of course, it might be some other fault causing your symptoms.
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Old 11th Dec 2018, 3:21 pm   #3
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Default Re: Philips VR6860 restoration.

Hi,
Thank you for this info.
I'll have a good look on the power board to see if I can spot it.

I've been looking online for the service manual, but can't find a download for it yet.

Thanks again
Richard.
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Old 11th Dec 2018, 7:32 pm   #4
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Default Re: Philips VR6860 restoration.

There will be more than one of these suspect electrolytic capacitors in your VCR and they won’t just be on the power supply board.
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Old 11th Dec 2018, 8:33 pm   #5
Maarten
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Default Re: Philips VR6860 restoration.

The light blue ones bottom right in post 15 in said thread indeed tend to short out. I''ve had to replace ones like that on multiple occasions.

A service manual can be found at http://freeservicemanuals.info/nl/se...e/DUTCHGERMAN/
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Old 11th Dec 2018, 8:38 pm   #6
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Default Re: Philips VR6860 restoration.

I agree Dazzle, This is the earlier "Echo deck" which preceded the much maligned "Charlie deck", however shared the same caps.
These blue caps always seemed to fail S/C when they did fail and could literally fail anywhere, I have had countless failures over the years in the most unlikely of places necessitating some serious fault tracing sessions in times past.
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Old 11th Dec 2018, 9:02 pm   #7
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Default Re: Philips VR6860 restoration.

Thanks for the reply everyone.

It seems that I'll have to replace them all then? Damn.
Are replacement caps of that type easy to get hold of?

Thanks again,
Richard.

PS,
Might be a silly question, but can these be replaced by the easily available electrolytic caps?
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Old 11th Dec 2018, 9:23 pm   #8
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Default Re: Philips VR6860 restoration.

No!, Don't attempt to replace them all, these machines used hundreds of them !
Trace the fault and replace the offending one with a "normal" Electrolytic.
These caps were not particularly unreliable, just they tended to fail S/C when they did fail, plus they could fail in parts of the circuit that was not particularly stressed, ie. it could be in the small signal stages.
If you attempt to replace all of these in your VCR you will probably never be able to set it back up and will almost certainly write it off in the process.
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Old 11th Dec 2018, 9:35 pm   #9
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Default Re: Philips VR6860 restoration.

Hi Richard, as R to B says replacing them all is not the way to do it. We now have a diagram available so it should be hopefully be possible to track the fault by voltage checks. The capacitors are nothing special and modern electrolytics can be used to replace any that are faulty.

I've not seen this model before but with other Echo based machines pressing play without a tape inserted should produce some form of test signal via the RF out, is this present?

John.
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Old 11th Dec 2018, 9:47 pm   #10
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Default Re: Philips VR6860 restoration.

Hi there. Can't really help you on this machine. But here's the manual:
https://freeservicemanuals.info/en/s...e/DUTCHGERMAN/

Hope this helps.

Fivos
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Old 12th Dec 2018, 2:02 am   #11
Maarten
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Default Re: Philips VR6860 restoration.

Quote:
Originally Posted by Snarf81 View Post
Thanks for the reply everyone.

It seems that I'll have to replace them all then? Damn.
Are replacement caps of that type easy to get hold of?

Thanks again,
Richard.
They fail quite randomly, not obviously depending on age or usage. When repairing somewhat newer sets, I always got away with replacing just the shorted one. No guarantee that it's the same after 30 years of course.

Their total failure rate might not even be much higher than that of other electrolytics, but where a circuit often functions almost to spec (close enough) with a higher ESR or lower capacity, it will almost certainly not function to spec with a shorted capacitor.
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Old 14th Dec 2018, 1:39 pm   #12
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Default Re: Philips VR6860 restoration.

Hi John,

I put the VCR into play mode with no cassette and there's no test signal coming from the rf out to my TV.

Thank you all for the replies, my testing is still ongoing.

Cheers,
Richard.
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