Nintendo Super System washed out colors

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Hello, I recently had the monitor capped and it looked good for a day and now the colors are washed out like they were before the cap job. When the monitor first went bad I started noticing the light blue sky and the shading on the mountains in the background of Super Mario Bros. would be missing yet other colors seemed strong? The monitor slowly got worse to where it just became pretty much a white screen. I have adjusted every pot and they all seem to work fine but the picture is just all washed out now. Anyone else encountered this problem? Thanks in advance. Helllllp. Mike : )
 
Thanks, I was thinking it had to be something other than the monitor. I will have my buddy look at it. I am just good at playing & breaking machines. I will try leaving it on for over 30 minutes tomorrow and see what happens. Mike : )
 
Left it on for over an hour. My problem actually seems to be the opposite. Mine gets washed out as it warms up and does not get better. Do you think it can still be the same problem. Mike : )
 
I'm sure that's the same thing... the voltage to the IR3P32A is probably low. IIRC pins 1 and 15 are GND and power... you can check it with a multimeter. Mine had problems being washed out and having the gray screen problem when < 8V, and looked really good at about 9V. They regulated the voltage with a series resistor from the 12V line, which is just stupid.

You could properly regulate it, or the easiest thing is to add a resistor in parallel with the existing 100 ohm to bring the voltage up a little bit. There's a pair of through-holes right by C10. Here's a pic of the mod I did to mine. IIRC I used a 220 or 330 ohm resistor. You don't want to go too low or you'll send too much voltage to the chip (I don't know what they're rated, but IIRC a similar chip was 8V-12V w/ 9V nominal). If you add too high of a resistor, it just won't fix the problem, so it's better to start high and go down in resistance. And definitely check the voltage when you start and as you change resistance... it may look really good at 14V, but probably not for long :p .

And I don't think there's anything else on that line that you'll hurt by bumping that voltage up (I haven't had any problem w/ mine since).

DogP
 

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