Sony KV-5100 Add pincushion circuit

[Devicemodder]

Originally Posted by ARC Tech-109

Looks very similar to the Sony BVM-5300 triple monitor deflection board, these were used in the early to mid 80's and notorious for deflection issues. I'd strongly recommend replacing ALL of the electrolytics before chasing a pincushion error, I have two of the triple monitors and they all have some degree of pin error that will not go away no matter how it's adjusted. The RV506 pot is 10K and cap is 1uf @50v in my 5300 and I believe it adds a parabolas to the vertical amp. When you recap replace C506 with an electrolytic not tantalum.

Recapped the rest of the electrolytics the other day, picture looks brighter, but still having pincusion issues. i'll put the pot and cap in place. are there any other parts i need?

[Alex KL-1]

Probably miss some parts. When several parts are needed for a factory recall mod they will tend to respond like Sony did.

[Devicemodder]

Originally Posted by Alex KL-1

Probably miss some parts. When several parts are needed for a factory recall mod they will tend to respond like Sony did.

So... how do I go about finding what these parts are? They aren't listed in the service manual.

[Electronic M]

Originally Posted by Devicemodder

So... how do I go about finding what these parts are? They aren't listed in the service manual.

Find the Sam's or Sony service manual for the other model number mentioned above that uses the same board but has the pin cushion circuit populated and give it a read. It should have the info you seek.

[jhalphen]

Hi to all,
Hi @Device modder,

I scanned the Sony KV-5000 service manual from a paper copy about 20 years ago.
20 pages, separate jpg images, color on schematic foldouts, did not scan parts list.
Looking at the setup instructions there is no data about pincushion correction nor can i find a sub-circuit dedicated to this function on the schematic.

If you do want the SM data to compare with the KV-5100 circuitry, please give me an E-Mail address via PM.

Cannot post anything here because of ridiculous file size restrictions.

Best Regards
jhalphen
Paris/France

[Devicemodder]

Originally Posted by jhalphen

Hi to all,
Hi @Device modder,

I scanned the Sony KV-5000 service manual from a paper copy about 20 years ago.
20 pages, separate jpg images, color on schematic foldouts, did not scan parts list.
Looking at the setup instructions there is no data about pincushion correction nor can i find a sub-circuit dedicated to this function on the schematic.

If you do want the SM data to compare with the KV-5100 circuitry, please give me an E-Mail address via PM.

Cannot post anything here because of ridiculous file size restrictions.

Best Regards
jhalphen
Paris/France

PM sent

Thanks!