When a ball is fed to the shooter lane, the front opto of the coin toss registers and awards the skill shot before the ball is plunged. Tapping the area in switch test does nothing, but pushing up very slightly on the playfield or trough makes the switch register.
Coin toss skill shot opto triggers before the plunge: reseat the coin toss connectors
Cause: An intermittent contact at the coin toss assembly's Molex connectors, disturbed by the small flex of the playfield.
Checks
- In switch test, press gently on different parts of the playfield and trough to find what makes the opto register.
- Check the coin toss opto wiring for anything touching metal, and check the optos are lined up.
Fix
- Reseat the coin toss assembly's connectors (repin them if the pins are loose or tarnished).
- If it returns, strip down and clean the skill shot assembly and check its optos and alignment.
Systems
Games
Related tips
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- All playfield optos dead after replacing one opto: failed 16-opto board
Source: Pinball Repair help group!! (Facebook group)