Capcom CPS1 / CPS2 Games

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channelmaniac:
Fixed: CPS1: Magic Sword:
Symptom: Dead/music & sound on power up

CPS1 boards play music or sounds immediately upon power up if there is a problem with the main CPU or ROMs. Checked the ROMs - Replaced 2 bad EPROMs. Board would now boot but display no picture and would NOT play blind. This is usually a C board issue. A closer inspection of the C board revealed a gouged trace. Repaired the gouged trace on the C board to fix the game.

channelmaniac:
Fixed: CPS1: SFII (Street Fighter II):
Symptom: Dead

The Audio subsystem ROMs, main CPU ROMs, and the graphics ROMs showed normal signals on their pins. Pulling one of the program ROMs did not result in any music playing. Swapped the A board for a known good one and received the audio that was missing. The C board was bad (The custom Capcom chip was resoldered to rule out broken surface mount solder connections) and the A board had audio problems. Swapped the C board out from another SFII that had a bad ROM board. Game would now play but had no audio. Repaired 2 cut traces and replaced 8 caps in the audio section to fix the missing audio problem.

channelmaniac:
Fixed: Strider:
Symptom: Dead

Missing program ROM. Dead and no audio output to signify missing program ROM. Replaced 1 missing program ROM. Still dead. No video clock was getting to the C board. Replaced broken ferrite bead jumper at FB1 to fix the power issue. Had corrupt graphics and no sound. Resoldered custom IC on C board to fix the corrupt graphics. Replaced 2 incorrect 1Mb EPROMs. (Had JEDEC and needed non-JEDEC) to fix the sound issue. Replaced 2 missing 16 Bit graphics EPROMs to finish the game.

channelmaniac:
Fixed: Saturday Night Slam Masters
Symptom: Dead

This is one of the games that has a special C board with a battery backed encryption key on it. Battery was dead. "Phoenixed" the C board. This means it was resurrected from the dead by programming 2 new unencrypted program ROMs, removing the battery from the C board, cutting a ground trace to 2 pins on the custom Capcom C board chip, and tying those 2 pins to +5v.

Game was still dead. This one also has the special QSound board and it had a similar battery as the C board that was also dead. Phoenixed the Q-Sound board by burning a 27C040 EPROM with both the encrypted and unencrypted code and adding in a 4002 IC to bank switch the ROMs back & forth to pass the CPU encryption checks. Attempted to play the game but it worked fine - I really stink at this one. ;)

channelmaniac:
Fixed: Knights of the Round
Symptom: Dead

This is another Capcom game with a suicide battery on the C board. Removed the dead battery. Traces on the custom IC were already cut so I just needed to jumper 2 pins of the encryption chip to +5v then replace 1 EPROM with a new one that had suicide free code to finish out the repair / phoenix of this board.

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