Anyone local to Washington do Nintendo PCB work?

Mindl3ss

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I've got a Playchoice 10 dual monitor board that's giving me trouble. I know there are a few guys around that do work on these things, and I just wanted to know if anyone does the dual monitor playchoice boards.

I'm really interested in learning myself, so if possible, I'd pay whoever and help them test/work on it. If not, I'll just pay someone.

If anyone local can help out, please let me know. I've got a few days off, and would like to get this thing done ASAP.
 
i hope some one does i need some work done also vs and playchoice single and duel monitor hope someone relpies also.:)
 
He just responded to my PM and said he doesen't work on them

I had asked Dick several months back about the playchoice stuff and he said no.

He does service the majority of Nintendo stuff as well as lots of others.

Just don't ask him to work on Taito boards.....

I have no idea who else may work on the playchoice boards, what is the problem you're having???? - Barry
 
I had asked Dick several months back about the playchoice stuff and he said no.

He does service the majority of Nintendo stuff as well as lots of others.

Just don't ask him to work on Taito boards.....

I have no idea who else may work on the playchoice boards, what is the problem you're having???? - Barry

Plug it in, the top monitor shows nothing, the bottom flashes as if turning on and off, but at a steady pace.
 
You ARE kidding, right?.

I guess I don't know what you're saying...

Have you tested the power supply for proper voltage?

Going to try that tomorrow... Guess since the power supply I just got was sold to me as tested and working, I just assumed it is... I'll post an update as soon as I can in the morning
 
Start with the voltages. I have dual monitor playchoice and would be happy to test your board and/or power supply for you. It's quite the drive though. - Barry
 
Here's what I got from the power supply... all the 5V were reading 5.19, and the 24v was reading 22 (that's as accurate as I can get on my cheesy little meter for 24v)...
 
The 24V is for the Coin Counter and doesn't matter.
Check the 12V coming from the DC/DC converter, although I don't think this is the problem.

Verify and reseat the EPROMs on the Main PCB.
Reseat or Swap the Z80.
 
Well, I don't have a filter board, so that's already done.

When you say DC/DC converter? I'm not sure I know what you mean.

I will reseat the all the chips here today some time. I have to either find my chip puller (probably don't have it any more) or go get one...

once I do that, I'll post back if there's anything new
 
Well, I don't have a filter board, so that's already done.

When you say DC/DC converter? I'm not sure I know what you mean.

I will reseat the all the chips here today some time. I have to either find my chip puller (probably don't have it any more) or go get one...

once I do that, I'll post back if there's anything new

It depends on the revision of the PCB. Most have a big black DC/DC converter near the edge connector that generates 12v from the 5v on the edge connector. The 12v is used on the transistors that drive the monitor signals although that may only be for the NES side which isn't your problem right now. If you have an EPROM burner you should verify the Eproms as well as I have seen those get bit rot before.
 
Ah, that must be the large TDK block on the board.

I do have a total newbie questions. I tried asking in my class at college where we're supposed to learn about these things... but I didn't get a straight answer. Why do those chips have a window in them, I've seen a lot of them with tape or something over them. Is it bad to leave them uncovered? Could that be leading to the issue I'm having?

also... the PPU is supposed to have a heatsink on it, isn't it? That chip doesen't look well... I've heard some say it can be replaced with an NES one, and some say it can't.
 
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Yes the TDK part is the DC/DC converter.

The window is used to erase the EPROMs. The EPROMs are erased after a certain amount of exposure to UV light. The lack of a covering on them could lead to bit rot, but so could age.

The PPUs used on the Playchoice and Vs can not be replaced by a NES PPU. The NES outputs composite video and the rest output RGB and Sync. The Heatsink missing isn't a major concern right now. The NES section doesn't have a game in it so it isn't doing anything useful.
 
The windows are used for erasing the chips prior to reprogramming. They get erased by ultraviolet light concentrated into the window. Covering them with tape is a good idea.

The PPU should have a heat sink, I don't know if the NES uses the same chip.
 
Thanks, both about the answers on the Eproms... that IS what I figured... but, just needed confirmation, I guess...

I need to go to Fry's...
 
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