Build a replacement keypad
Steps
- Get the keypad schematic and the row and column table for each key (an enhanced schematic and board layout for a remake exist).
- Wire one push button per key between the matrix row and column it uses.
- Wire the buttons to a 15-pin .156" housing, matching the pin colors of the game's keypad plug and keying pin 4.
- Plug it in and check each key echoes on the match/credit display.
Systems
Games
- Beat the Clock
- Black Belt
- City Slicker
- Dungeons & Dragons
- Eight Ball Champ
- Hardbody
- Heavy Metal Meltdown
- Lady Luck
- Motordome
- Party Animal
- Special Force
- Strange Science
Related tips
- A missing keypad locks you out of the menus
- Keypad keys are switch matrix crossings
- No ball served and flippers dead after start: tilt switch closed, tilt lamp out
- Centre pop bumper does nothing and doesn't score: spoon switch gap too wide
- Hitting the jukebox targets triggers several switches: blade touching its mount
- One target triggers several switches: switch blade shorting to its mount
- NTE replacement emitters fit the opposite way round
Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)