problem in sun GDM 20E20 Monitor

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ankurjasani Contact options for registered users 's Avatar (by Gravatar) posted on
October 25, 2007, 7:48 pm
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i hv two Sun GDM 20E20 .  some time it got the problem when it was
 running. suddenly red color got off. now the only red and green color
 comes in screen . in second monitor there is only  red color .plz
 help me wht may be  the problem??


i hv checked for cold solder but i hvn' found any cold solder .
i gave my monitor for repairing in my city but he couldn't found exact
problem in it .
he told me there is problem  in color processing IC.  but i don't know
which IC   processes the color.

I think tube is ok bcoz i hv changed the board which connected to back
of tube.
when i interchange the board the problem is also interchanged.

Can any buddy tell me which IC may be faulty

thanx in advance every buddy


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JANA Contact options for registered users 's Avatar (by Gravatar) posted on
October 28, 2007, 2:39 am
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Re: problem in sun GDM 20E20 Monitor


It may not be the chip. You should use a scope and follow the video process
path to determine where the failure actually is.

In most of the Sony monitors, there is a main driver IC on the video board
that is on the CRT socket. There are also other devices that can cause this
type of fault.

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JANA
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