Sony 1953MD capacitor question C518 and C627

[HermanMunster]

I am doing a complete recap on my sony 1953md pvm and have a couple of questions regarding two specific capacitors, C518 and C627.

Per the service manual, C627 on the power supply board is supposed to be a 1000uf, 50v capacitor. However, when I opened the power supply board, I noted that an Elna 1000uf, 100v capacitor with an 85 degree temp rating was installed. I have some good quality Panasonic FR series, 1000uf 50v caps that I was going to use to replace C627. Should I get a 100v rating cap instead? Was there a revision on the spec of this capacitor? C627 is a smoothing power supply capacitor that is placed on a 15v dc rectified line right out of the transformer.

My second question is about C518. The manual states that this capacitor should be 100uf with a 160v rating. On the board it looks like a very large capacitor for its low capacitance and voltage rating, which was kind of surprising to see (I guess that larger caps dissipate heat better than smaller ones, specially in high-heat areas).
I do not have a 100uf, 160v capacitor, instead I have a 220uf, 200v capacitor that I mistakenly purchased. Could I use the 220uf capacitor instead? C518 is on the 115v line of the A board, which is feeding the vertical and horizontal deflection circuits, with its negative leg on ground. This capacitor is just there smoothing the 115v power supply. However, I do not know if increasing capacitance to 220 would decrease the life of the transformer.

[jd213]

Doesn't seem like the first cap would need to be 100V from your description, but being increased to 100V might've been a fix from one of the service bulletins, I know my 20L5 has some factory fixes like that where an Elna cap is used along with some epoxy to hold it down. Not sure if the bulletins for that particular model are available, but I know some are being passed around Discord.

AFAIK there's limited situations where you can put in a cap with a different capacitance, and I think you'd need to have engineer-level knowledge to figure it out, so I your 2nd cap should probably be replaced with a similar one unless it was specifically recommended somewhere official-ish.

[HermanMunster]

Thanks! I guess I'll go ahead and purchase both caps on Digikey. They are cheap, so money is not the problem. I just wanted to use all the caps that I had; did not want to be wasteful.