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Need Help: Punch Out!!! glitch...what's making this happen?
kaneda:
--- Quote from: UFO on December 16, 2013, 05:53:42 am ---MGB is spot on the money to try the leg cleaning ...
Personally, I would be posting on KLOV - there are quite a few members I know that own Punch Out.
--- End quote ---
So I cleaned all of the legs on the chips circled in red. Should I go and do it for all of the socketed chips? There's a lot on this 3 board PCB...
UFO:
--- Quote from: kaneda on December 16, 2013, 08:48:02 am ---
--- Quote from: UFO on December 16, 2013, 05:53:42 am ---MGB is spot on the money to try the leg cleaning ...
Personally, I would be posting on KLOV - there are quite a few members I know that own Punch Out.
--- End quote ---
So I cleaned all of the legs on the chips circled in red. Should I go and do it for all of the socketed chips? There's a lot on this 3 board PCB...
--- End quote ---
Kaneda, I can't help you any further, and my advice would have been the same as MGB's initially.
If you go to http://forums.arcade-museum.com/ and ask there, I feel you may have a better response. They own original arcade games, and many of them have Punch Out. I know of a couple of guys who are restoring them there.
I'm not saying no-one here can help, but this is more of a MAME forum as opposed to dedicated.
Good luck.
mgb:
I would clean any chip that is socketed. Not just the ones circled in red. I just showed those as an example
Of a socketed chip and those are the chips associated with graphics.
Just be careful when removing and replacing chips.
Also re-seat all ribbon cables.
You should also try cleaning the chip sockets with contact cleaner spray.
There's also a chance that one of the graphic proms has a bad socket or possibly bad solder joint on
A socket.
MaximRecoil:
Check the +5 voltage at the board. I had similar graphical glitches in my Punch-Out, and found that the voltage was at +4.89 VDC. Adjusting it to +5 volts solved the problem. For the original PP-1000A power supply, the adjustment pot is inside at location VR2. Since the power supply's top housing has ventilation slots, you may be able to adjust the pot with a long thin screwdriver, but it is easier to just remove the top of the housing to adjust the voltage.
On the boardset's card edge, pins 15-18 are for +5 VDC, and pins 11-14 and 54-56 are ground.
mgb:
That's good to know.
I wasn't sure if that psu had a 5 volt adjustment.
But I've found many times on games with video glitches,
that the 5 volts is low.
Of course this also a common cause game board resets too.