Super Pang (Jamma) Repair

Received a dead Super Pang jamma board sometime ago along with a heap of other faulty boards. Had played the game on Mame a lot so was keen to try and get the board working again.

This board was one of Capcom's earlier attempts of a "Suicide board",  basically all or part of the ROM set was encrypted and the encryption keys stored on battery backed volatile memory so when the battery died you lost the encryption keys.
Thankfully much work has been done to bypass this, The Dead Battery Society has full details on the modifications needed to board as well as the decrypted ROMs needed.

Following their instructions I was able to get the board up and running again. However there were problems with the background colours, which got worse over time as the board heated up.

Not pretty but works

Background saturated with 'Red'

Was unable to find any schematics for this board but did find another repair log for a similar fault. Sure enough the same RAM at 8C was the problem as in the other repair. Swapped out the chip for another one resolved the problems with the colours.

New RAM at 8C fitted

Proper colour restored