Indiana Jones: finding which optos make the Path of Adventure stutter
Steps
- Wipe the U optos on both flipper opto boards, and the pair on the POA switch board (inside the playfield's back panel), with a glass-cleaner swab.
- Run the POA test in diagnostics; it uses the coin door buttons, not the flipper optos.
- If it stutters in the test, the POA switch board optos are failing; replace them.
- If it runs smoothly in the test but stutters in play, replace the flipper button U optos. A stutter to the left points to the left flipper opto board.
- To confirm, exchange the flipper opto boards side for side; the stutter should follow the faulty board.
Systems
Games
Related tips
- Indiana Jones: exposed switches at the Path of Adventure get bent together
- Indiana Jones: Path of Adventure stutters when moved with the flipper buttons
- Indiana Jones: no optos work, check J905 on the Fliptronics II board
- Indiana Jones: left slingshot switch touching a GI socket
- Indiana Jones: balls keep ejecting from a crushed mini-playfield switch
- Indiana Jones: flippers die, one display line lit, balls keep launching
- Indiana Jones to Demolition Man games have two LM339 opto boards
- Indiana Jones ninth switch column
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)