As soon as the game is switched on, the right hole on the mini playfield keeps firing, and a ball dropped in the left hole is kicked straight out.
Mini-playfield hole keeps kicking from power-up: opto wire cut by the elevator
Cause: A broken wire between the left and right optos of that hole, most likely cut by the moving elevator (mini playfield) mechanism.
Checks
- Check the opto in switch test: an opto reads closed when the beam is clear, so a broken wire looks like a ball is always present.
- Inspect the opto wiring where it passes near the moving mechanism.
Fix
- Repair the broken wire and route it clear of the mechanism.
Systems
Games
Related tips
- Egg target optos dead after fitting replacement opto boards: refit original receiver
- Optos all read closed at power-on: blown opto supply fuse
- Check opto power supply message with good fuses: reseat the opto board plug
- Checking an under-playfield opto board for bad LM339s
- Fitting a replacement U slot opto the right way round
- Eddy sensors: electronic ball switches under the playfield
Source: Pinball Repair help group!! (Facebook group)