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Old 2nd Oct 2022, 4:57 pm   #20
murphyv310
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Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,420
Default Re: Sony KV-A2942U very soft focus in middle of screen

Hi.
Where are you getting stuck with the instructions?
It's important to basically start from scratch, remove the ferroxcube magnets and any little round magnets stuck to the cone in corners etc. Follow the instructions, use a dot pattern at low brightness and make sure centre focus is spot on. Think of it you are fitting a new CRT. Trying to correct existing convergence isn't easy so basically start from scratch.
Come back if you have problems. Remember if you cannot get this correct then is possible the CRT is at fault, doming can occur, this is caused by heat in the aperture grille due to high beam current and is more of an issue with large screen Triniton CRTs this can eventually cause permanent damage that effects purity and convergence.
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Trevor.
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Last edited by murphyv310; 2nd Oct 2022 at 5:06 pm.
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