Sony PVM 2054QM screen adjustments questions

Hello! It's my first time contact with PVM tube and service menu. Final results are from:


to:



Left side is almost perfect, right side... Well, I don't know if it is possible to make right edge straight with just service menu I bet this may be a capacitor fault (?).
So here are my questions that buggers me:
1) In standard menu, this model has V Hold setting that is separate from service menu Other/ V Hold adjustment. Should I touch only one of them?

2) Linearity pattern shows that outside circles are deformed. Which options in service menu can fix them? Or only recapping can help?


3) Why some outside circles has so messed color focus? On games I don't see such aberrations
(good)
(bad)

4) When I run any SNES NTSC game, always for a second I see on the top edge a blue line that immediately disappears. Anybody knows what it is and how to hide it?


Any hints will be appreciated!

 

Honestly it looks pretty good to me as it is right now. You won't get 100% perfect geometry on any CRT so better get used to slight imperfections. The bowing on the right edge is commonly said to be fixed by replacing caps in the deflection circuit area.

V HOLD is for fixing a picture that rolls through vertically, it is not relevant to any of your issues.

The convergence issues in the top right corner look noticeable with that test pattern but unless it's something you notice ingame and from a normal viewing distance, I wouldn't bother with it. This seems worse in general on the 20" PVMs compared to the 14". The process for convergence adjustment is described in the service manual. Alternatively it's sometimes possible to improve these issues by attaching magnets at the right place but I wouldn't recommend that unless the CRT is in an otherwise unusuable state.

The RGB lines at the top are normal, their position is altered with V SIZE and V CENTER. Just leave it alone if it doesn't interfere with any of your consoles. If they ever become visible during normal operation and can't be fixed with the aforementioned settings it could be due to one capacitor that prematurely fails in some PVMs, but this seemed to mainly affect the M-series.

 

Thank you for reply Xan01!
I'm wondering why convergence issue is noticeable only on top half of the screen. I thought that is a global misalignment (equal on whole screen).
The thing with the blue line is a weird stuff. I'm not sure if this blue line is part of retrace lines, it's has more vivid blue color and it's pops up only for second during turning on game and the disappears

 

I recently got a 1454QM PVM and I am also having some geometry issues, this is the best I can achieve:



and these are the default settings , the upper part of the screen is really distorted:



Vertical Linearity is really wrong and sure enough the right edge is distorted as well (might not show well but it is). So I did some research and indeed the v.linear issue is a capacitor issue - and I bet the right distortion is one as well. I have ordered replacement caps for the chassis - everything from 220uf and above (that's about ~45-50 caps, a complete one is ~200+ and smaller ones don't affect geometry afaik).
I will report back once I recap, it will take some time though since I have other projects to finish before I start this

These monitors should be near-perfect or have really really small issues - not have distortions worse than a consumer-grade TV set. But these monitors have been powered on for thousands of hours so maintenance after 20+ years is to be expected.

 

Thank you for sharing. You are right - those monitors have a long history of heavy usage. Please notify when you will apply new capacitors, cannot wait for result of this change. Good luck with that!

 

yep, I'll report back as soon as I can.

 

It's a common issue for trinitrons. The flat crt tubes are never quite perfect when it comes to convergence. Just leave it be.