After replacing an intermittent opto (start mission), none of the optos on the 16-opto board work, along with the spinner, although the board's LED is lit and 12 V is present. New LM339 chips on the board don't help. Trough optos and other switches still work.
All playfield optos dead after replacing one opto: failed 16-opto board
Cause: A fault on the 16-opto board itself, which also damaged the newly fitted opto.
Checks
- Check for 12 V at the opto board and at each opto receiver.
- Briefly short the two receiver wires: if the switch then registers, the wiring and board input are working.
Fix
- Replace the 16-opto board and fit another new opto at the position that was originally faulty.
Systems
Games
Related tips
- Turn ends while a ball is still in play in Final Frontier: flaky trough opto
- Indiana Jones to Demolition Man games have two LM339 opto boards
- Eddy sensors: electronic ball switches under the playfield
- Cannon won't turn on the third multiball shot though it tests fine: flaky opto wire
- Adjusting an STNG, Theatre of Magic or Roadshow eddy sensor
- Eddy sensor board R1 values by game
- Every opto dead and opto board LED off: check the J118 ground
- Opto switches dead or intermittent: check the 12 volt supplies
Source: Pinball Repair help group!! (Facebook group)