Konami Games

[channelmaniac]

Model: Hyper Sports
Symptom: Graphic corruption - foreground and background

Replaced the 74LS20 at D3 as it had a floating output. Replaced the 74LS244 at D6 as half of its outputs were stuck high. Replaced 74LS153 at H5 that had pin 9, output for bank 2, stuck high. Replaced 2 bad 2114 RAMs at H9 and J8. Tested.

Board failed during extended burn-in. Replaced a bad 74LS153 at J7 that had both output pins 7 and 9 chattering. Tested.

[channelmaniac]

Model: Bucky O'Hare
Symptom: Color corruption

Fixed a dead trace to U83, Pin 11, and tested

[channelmaniac]

Model: TMNT TiT Conversion
Symptom: Dead, stuck in watchdog with flickering screen

Removed program ROM and fixed multiple bent pins not making contact with the socket. Tested.

[channelmaniac]

Model: Hyper Sports
Symptom: Missing sprites

Traced backwards through the circuit to the 6301 PROM and found it had dead outputs. Tapped the 083 custom that feeds it and sprites tried to come back. Replaced corroded socket on the 083 and cleaned the pins on the custom chip. Tested. Replaced hacked mounting hardware with proper replacements to keep the boards from shorting together. Tested.

[channelmaniac]

Model: Super Basketball
Symptom: Missing player sprites

Sprite RAM (4164) data output was bad. /RAS and /CAS signals were incorrect. A 7404 in the main clock divider circuit had bad outputs. Replaced and tested.

[channelmaniac]

Model: Jailbreak
Symptom: Dead.

Board had a HSS module installed that didn't work.

Removed the high score save module and installed a Konami-1 CPU into the CPU socket and successfully booted the PCB. Rearranged the board stack for the HSS module as the Konami-1 to 6809 adapter PCB in the middle was installed backwards. Tested the game.