Konami Repairs

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channelmaniac:
Fixed: TMNT (Teenage Mutant Ninja Turtles):
Symptom: Garbled background and foreground graphics

Repaired 2 gouged traces to fix the foreground objects. Resoldered cold solder joints on the background ROMs to fix background images and score/health display.

channelmaniac:
Fixed: Crime Fighters:
Symptom: ROM error and garbled foreground graphics

Pulled the ROM and compared its checksum against the MAME database. ROM was good but the data line was held low. It connected to a Konami custom surface mount chip. Swapped out bad custom chip "051962" with one from a dead Konami parts board.

channelmaniac:
Fixed: Run and Gun
Symptom: Dead

A physical inspection turned up 2 gouged traces and bent pins / busted solder joints on 2 surface mount ICs. Fixed the traces, bent pins, and busted solder joints. Board would still not boot. Checked the ROMs on the board. Replaced one bad Mask ROM, one bad EPROM, and erased/reprogrammed a third EPROM to match the code used in replacing the bad program EPROM.

channelmaniac:
Fixed: Lethal Enforcers II
Symtom: No video

Replaced a broken 056820 hybrid IC with one from a parts board. Board works but the connectors between the top and bottom board are finicky. You have to push them together firmly to keep from getting graphic corruption on the foreground characters. Cannot fully test it since I don't have any guns to connect to it.

channelmaniac:
Fixed: Run and Gun
Symptom: Ressurect parts board

A physical inspection turned up patched JAMMA connections, 5 missing ROMs and a missing sound CPU. Fixed the JAMMA connector, burned new EPROMs, and replaced the missing sound CPU. Board would boot but give RAM errors for 27H and 29H and a bad EEPROM error.

RAMs had no address line activity. Noticed one desoldered hole next to the RAMs. Checked the MAME board pics and the board was missing a chip - 74LS244. Replaced the missing chip and the board would boot and pass the RAM diagnostics but still gave an EEPROM error.

Found the reset instructions for Konami boards: power it up with the test switch pressed. This caused the game to reset the EEPROM data which finished the game repair.

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