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Old 30th Sep 2022, 6:49 pm   #1
Retrorepair
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Join Date: Apr 2019
Location: Denbigh, Wales
Posts: 149
Default Sony KV-A2942U very soft focus in middle of screen

Hi all,

I've gone back to consumer Trinitrons, the PVMs were nice but too small for me

The issue I have with this one is the focus. The edges are nice and sharp, but the middle of the screen is very soft, like the very center top to bottom, getting sharper towards the left and right.

Adjusting the focus doesn't help, though making the screen very dark does (but it's basically unusable at this point).

I see there's a service bulletin to replace an LM393 if this is the case, but I believe this is only for AE2 sets with dynamic focus which I don't think this one has.

Is there a known fault with these that can cause this? Maybe a cap in the PSU section or something?
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