Any KLOV'ers in or around Richmond, VA? Need Help With Monitor

JMAN81

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Any KLOV'ers in or around Richmond, VA? Need Help With Monitor

I just got my first arcade cab and it's pretty cool .. however the monitor does not show the color red. I wanted to know if any fellow KLOV members in or around Richmond, VA might be willing to take a look at the monitor and see if it can be fixed.

The monitor itself has a sticker that says it's Panasonic S178JUA29X

I've taken a few pics of the inside, you can view them at this link (my website)

http://www.vibelicious.com/arcade/

(they were too large to post inside this thread)

Thanks in advance for your help.
 
bad news on the monitor ... I had a repair guy come out and he said the red is totally dead and I would need a new monitor. this sucks, since I really can't afford a 27" monitor. I guess owning my first arcade machine isn't all it's cracked up to be.
 
That is bad news but all is not lost. 27" tv sets are plentiful and cheap and one may be a direct drop in replacement. Do you know how to use a multimeter? If so then you can check the resistance across the two circuits in the yoke and then compare the readings with those found on any 27" tv sets you find. If the neck pinout matches and these readings are close you can just swap in the new tube.
 
Disregard my last post.

What did he say was dead? If it is a problem with the red drive circuit then it can almost certainly be repaired, though the repair may be beyond the ability of the guy who came over.
 
I have no tech knowledge / skills in this area, so im just at the mercy of whom ever.
He brought in equipment and tested the monitor (I believe the tube is what he said he was testing) said he got green & blue but no red. he just said the red was dead and there was nothing he could do for it and I would need a new monitor.
there is a sticker on the back I guess from someone previous that say red driver bad.
 
OK, if he said it was a dead red gun on the tube then my post about TV sets is the way to go. I was suggesting finding a tube/yoke combo that matches because many of these larger sets have a molded yoke (it is an integral component of the vacuum and can't be removed). it will also make the swap much simpler.
 
he didn't say red gun, just said that the red was dead *shrugs*

well for the TV thing I'd have to find someone local who knows how to work on monitors and no one has connected me in my previous posts, so looks like im SOL.
 
((((Just a quick safety warning - monitors have LETHAL voltages inside, so you definitely want to be careful working with them. That big red wire going to the pic tube can knock you into next month if you're not careful!))))

Wow I'm wondering if the problem is RIGHT there very obvious - look at the top pic, one transistor on the neck board is bent over! With it turned off, clip the top wiretie off the plastic piece on the back of the neck board (the board on the picture tube), and carefully flip it down (don't touch anything when you do!).

Look at the solder dots for the 3 legs of that bent transistor, if you see a hole where a leg should be, you probably just have to solder that transistor back in properly.

Be careful handling the neck board - the picture tube is fragile where its attached. If that transistor needs to be resoldered, let us know and we can walk you through fixing it if you have a soldering iron (not a GUN, an iron).
 
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I appreciate the reply Orion, but as I mention above I have no knowledge or skills in this area. Everything you said is like speaking chinese to me lol I've never touched a soldering iron in my life, so I'd have find someone local who has the knowledge and skill to try this. FREE BEER! for anyone who is willing to help lol
 
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2 years ago I didn't know how to do any of this stuff. anything is possible, and anything can be learned. most of the usual repairs that you do on video games are really not all that complicated.

but basically, the CRT tube has 3 guns, one for each primary color (for a CRT anyway) of red, green, and blue. on the neckboard that plugs into the tube there are 3 color drive transistors for the red, green, and blue. those are what control the signal of what appears on the screen. if any one of those transistors is bad or not soldered in right, you will lose whole colors like you have now.

whenever diagnosing these, the easiest approach is to desolder one of the known good transistors (the green or the blue in this case) and swap it with the "bad" red one. if your problem carries (meaning the red is functional again, and the green or blue that you took the good transistor from have gone bad) then it's an issue with the transistor. they're easy to find online and to replace once you get handy with a soldering iron, something that takes practice.

EDIT: I forgot scenario 3: perhaps the red wasn't even soldered in right (as outlined above), and then you'll have all 3 colors working again. :)

however, if there's no change after doing the transistor swap, then your problem is inside the tube, after which you'll have to either replace the whole monitor with a new one or have someone assist you with swapping the tube with a good one.

I know this doesn't make it better for you or grant you sudden magic powers with a soldering iron, but I learned a fair share of what I know now based on other people's experiences on here, and it gives you a better sense at how to troubleshoot.
 
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