Trough 1, trough 2 and the left ramp made optos don't work. After replacing the opto board, some return, but hitting certain standup targets also triggers the ramp made or trough opto.
Trough and ramp optos dead or cross-triggering: switch and lamp plugs swapped
Cause: Under the playfield, a switch line had been plugged into a lamp connector and a lamp plug into a spare switch connector (left over from an early version of the game with an extra drop target). The lamp voltage on the switch line had damaged the original opto board and the trough 1 opto.
Checks
- Compare every under-playfield plug with the manual's wiring and connector charts; look for matching-size plugs that have been swapped.
- Check for switch-line plugs that are unused on your version of the game.
Fix
- Put the plugs back on their correct connectors, then replace the damaged opto board and any failed optos.
Systems
Games
Related tips
Source: Pinball Repair help group!! (Facebook group)