25K7501 HELP with collapse

THEDJ

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I have a wells 25K7501 med res 25" monitor.


The screen only shows a FLAT HORIZOTAL LINE. (IN MIDDLE OF SCREEN)

HORIZONTAL COLLAPSE - Would that be a cap kit? or something else?

I do not have much experience with 25 med res monitors

I need to fix that monitor or replace - it will go in a hydro thunder game.

Or I was thinking about a trade.

working 25 monitor for a working splatter house conversion game. or a daytona usa project game

pm me.

thanks
chris
 
Last edited:
piuct of the daytona project

trade for a working 25 med res.

thanks
chris
 

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AFTER you do a full cap kit and still have the same issue:

1) Check D302 for a short.

2) Check R303 for an open.

3) Check U601 for any shorts between any two legs.

Replace any that are bad. That should take care of your vertical collapse.

Make sure you do the cap kit first, as it will eliminate bad caps from being the cause...
 
AFTER you do a full cap kit and still have the same issue:

1) Check D302 for a short.

2) Check R303 for an open.

3) Check U601 for any shorts between any two legs.

Replace any that are bad. That should take care of your vertical collapse.

Make sure you do the cap kit first, as it will eliminate bad caps from being the cause...

thanks. i think its time i try a cap kit.

thanks again.
 
output ic bad
replaced cap by the ic also
also burnt resistor

changed the value of the resistor
to drop the voltage going to ic form 30v to 28v to help with any future problems.

thanks
again
chris
 
I'm pretty sure that was actually a vertical collapse, I'm not aware of any med-res games which run in vertical orientation. Congratulations on getting it going again.
 
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