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d6xkr d6xkr is offline
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Default Viewsonic E653 Monitor. Squashed picture II

hi


my monitor has pin cushion effect problem, and the picture edges are out of
the view. the monitor controls don't solve it as the (horizontal size)/
(pincushion\trapezoid) controls don't have effect anymore. this problem is
the same as this one posted here
http://www.electronicskb.com/Uwe/For...uashed-picture

but no body offers a solution. i already opened the monitor case, i found
four chips;

1. LSC506429P 2. TDA4858 3. ATMEL008 4.
KA3842B
JD157V2 67974 24C08
E009C
IJ35BCTBW0025 YTD0021

only two of these i could know what they do, no. 2 and 3.

the first one is motorola and is discontinued, i couldn't find it's datasheet
so to decide whether was it a culprit or not, i couldn't bring the datasheet
of the fourth chip either.

the image is normal except for this problem, and all the controls work fine
except for those i mentioned.

the caps seem to have leaked, but i'm not sure as the monitor was never
opened until the problem showed up which was last thursday. these caps look
as if they have black heavy dust stuck to thier metal top, and there is
plenty of it everywhere inside but only very few caps have it like this and
they happen to be arround the four ics i mentioned. but also that indicates
the leak is old, and the problem appeared three days earlier which adds to
the confusion. anyway the first thing to do morning is to get new
replacements, but i need also to know if someone else had this problem and if
it was/or not related to the capacitors? did he manage to solve it or not and
how?

thanx