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-   -   National Panasonic TR-565G Component television (https://www.vintage-radio.net/forum/showthread.php?t=139669)

Freya 9th Sep 2017 5:48 pm

National Panasonic TR-565G Component television
 
4 Attachment(s)
Friend bought this around for me to look at for him, it has reduced width leaving about 10mm either side. Other than that it works fine.
I have not been able to find a manual for it online, are there any stock faults for these before I strip it down which looks to be quite involved.

Thanks

John123 9th Sep 2017 6:18 pm

Re: National Panasonic TR-565G Component television
 
Leave it running for a while. If the width increases, most likely a slow electrolytic in the horizontal. You could simply replace all within the vicinity if unsure.

Freya 9th Sep 2017 6:22 pm

Re: National Panasonic TR-565G Component television
 
It was on for 4 hours today with no change, the capacitors would normaly be my first call though.

kevinaston1 11th Sep 2017 1:29 pm

Re: National Panasonic TR-565G Component television
 
1 Attachment(s)
Found this on the Radiomuseum website, any help to you?

Kevin

Freya 11th Sep 2017 1:36 pm

Re: National Panasonic TR-565G Component television
 
So far changed all electrolytic power supply capacitors along with the ones in the horizontal section C417 C418
No change so far but still investigating.

Welsh Anorak 11th Sep 2017 2:19 pm

Re: National Panasonic TR-565G Component television
 
Hi
Can't see in the pictures, but many small-screen sets used a high value capacitor to couple the line scan coils. That could be a suspect if there is one.
Glyn
PS Should engage brain first - looking at the excellent diagram I'd look at C412 and C410.

Freya 11th Sep 2017 2:30 pm

Re: National Panasonic TR-565G Component television
 
Thanks Glyn,
I have C412 out at the moment so we are one the same track at least. Now to test it.

Freya 11th Sep 2017 3:38 pm

Re: National Panasonic TR-565G Component television
 
Those capacitors check out fine, so went back to the power supply again.
Found D75 which I believe to be a 5.1volt zenner diode with no voltage across it, testing shows an almost identical short both ways.

Freya 13th Sep 2017 9:16 pm

Re: National Panasonic TR-565G Component television
 
The 5.1volt Zener diode D75 restored normal operation.
Think this can be closed now


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