Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: More Cowbell on November 12, 2007, 10:30:39 am

Title: Three Nintendo monitors, three Nintendo problems
Post by: More Cowbell on November 12, 2007, 10:30:39 am

I have a Popeye that I'm trying to restore and I have three monitors with which to do it.

Monitor 1) Came in the cabinet, dull colors, blotchy. Took it out, adjusted colors and brightness, all of a sudden it looks crisp and beautiful (not necessarily due to my adjustements). I put it back in, dull colors, blotchy. Looks like it needs to be degaussed. Do the degaussers go bad and sometimes correct themselves? Would a cap kit help?

Monitor 2) Nice colors, top 3" smear to the right (horizonatally). Did a cap kit, no change. Any ideas? Any other caps I didn't replace perhaps causing this?

Monitor 3) Beautiful colors, slight burn in from Dr. Mario but looks fine behind smoked plexi and when running game. Top 1/2" smeared (scores). Tried adjustments. Will a cap kit fix this?

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: grantspain on November 12, 2007, 12:28:02 pm

the ptc components can go open circuit thus not operating the degauss coil
as for your others it does sound like caps or adjustments.

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: More Cowbell on November 12, 2007, 12:35:28 pm

Is there a way to fix the degaussing coil?

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: grantspain on November 12, 2007, 12:43:21 pm

you can try replacing the ptc component,may do the trick otherwise buy a degaussing wand as they are always helpful

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: ncflagg on November 12, 2007, 12:43:51 pm

I have spent hours working on a few monitors that ended up being video connector problems. The monitor looked great one minute and then was missing colors/dark/hazy the next time I turned it on. Sometimes the punch-downs to the connector work loose or the pins get pushed back.

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: cw on November 12, 2007, 02:54:54 pm

thats one good reason to reflow the input pins and to double check your harness for damage or corrosion on the pins....

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: SavannahLion on November 12, 2007, 08:48:02 pm

Quote from: grantspain on November 12, 2007, 12:28:02 pm

the ptc components can go open circuit thus not operating the degauss coil
as for your others it does sound like caps or adjustments.

PTC?

Title: Re: Three Nintendo monitors, three Nintendo problems
Post by: Kevin Mullins on November 12, 2007, 09:58:35 pm

PTC (http://en.wikipedia.org/wiki/Positive_temperature_coefficient)

Generally the round disc looking component you will find near the plug in on the main chassis for the degauss coil. They can also be found contained in a small square box. Without getting technical about this, it acts as a switch based on the current flow and tewmperature change due to that current flow.
It is ON when cold, OFF when hot.