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- rg26ce1991
November 7, 2006, 11:59 pm

NEC FS-6391.
Greetings group.
When first turned on the picture fills the screen, but as the set warms
up,
the picture can shrink to a couple of cm in the middle of the screen if
it gets warm enough.
The nearest schematic I have is for a 6390 but I should the a 6391
schematic soon.
Supply voltages seem o.k. and appear to stay the same as the set warms.
Capacitors should improve when they warm up, but I replaced a few
anyway.
Using a hairdrier, the most sensitive area seems to be near IC201
(M52778SP A).
I have tried freeze spray, but nothing I freeze seems to change the
size of the pic.
If the set cools on its own, the picture returns to normal.
Russell Griffiths.
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