Jr. Pac-Man needing HELP!!!

Jr. Pac

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Donor 2012, 2015
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Today, I picked up a free Jr. Pac-Man conversion from a Galaxian cabinet (will be restored to a Jr. Pac-Man). After cleaning the fuseholders etc., this is all that appears on the monitor.
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It varies.
0E94E57A-BF8C-4AA6-9364-83B2397F3BD4-170-0000001234D71216.jpg

The inside:
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And PODIH.
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Crappy cell pic... the incorrect art is temporary until I have proper repros made.
 
Verify the roms and the voltages first and report back. Dump the roms and run them through romident and verify the voltages at the pcb. I think the roms are not the right ones or are mixed up.
 
Good job JrPac

Start by visually checking that harness carefully for broken leads, reseat all the socketed chips and any connections on and to the board

Then check your voltages

Its hard to tell from the picture, but is the garbage on screen in sync? Or is it scrolling vertically (which in this case would be left to right)
 
Thanks for the kind words!

According to my father, he was getting ~7.5v and around 16v in the power supply. No wiring seems to be frayed.

A ROM dumper is unfortunately something I have no access to so that's not an option.
I'll double check everything's in the right place and try reseating the chips.
 
The biggest culprit in many cases is what 30 years does to these components... surface corrosion, cold solder joints, busted wires or worn out connectors are more common than failed components or bad roms...

carefully pull each chip out partway, evenly end to end, and pushe them back in while supporting the back of the board where it is (ie dont flex the board)

check your edge connector for burned or corroded pads, sand or solder to ensure solid connections...

I highly doubt there would be a problem with the roms unless its related to the above case or a broken leg... the guy i got it from pulled it working (years ago) and i know he wouldnt have done something silly like that...
 
HOLY !!!!!!!!!!!!!!!!!!!!!!!!
One of the ROMS had a bent pin which was fixed, then it was playing blind. We figured out the fuseholder for the monitor's fuse was broken... reattched it and voila! The monitor needs to be reconverged bigtime (never done it before...) and the colors are off (orange Jr), but it works!!!! Aparently I screwed up the joystick wiring but oh well! Easy fix!

WIll post pix tomorrow.
 
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That's fantastic news. Great job on saving that classic. Keep it a Jr. Pac, way rarer than a Galaxian and more fun IMO.
 
I agree. Additionally, no need to have two Galaxians right next ot each other.

Jr. Pac-Man was my grail and now it's mine! So far all of my broken games have been repaired in a night!
 
Better pix.
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A video of it running (YAY!!!!). Click this picture to watch.





I'm currently working on vectoring the marquee and CPO so I can have them custom printed. Still WIP.
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Turns out it's some rare Zenith monitor according to Slackmoe with few parts available... may as well just replace it.

Never rejuvinated a tube before...
 
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Zenith monitor???

Post a pic of the chassis there pip-squeak.
 
Zenith monitor a friend of mine called me yesterday to ask advise and said the same thing. That is just the tube manufacture look on the chassis to help identify the make and model. Good luck
 
I think he's right, it was a monitor i'm not familiar with
Quick look i figured it was a wg4600 because it had a vertical daughter board, but it wasnt

Jr: if you can make it reach, unplug the signal connector from this game and plug it into another game's monitor to make sure you're not losing green from the board or harness
 
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