The right flipper is fine at first but gets weaker after a few games until it is unplayable. Swapping the flipper opto boards and replacing the LM339 chips on the Fliptronic board made no difference, and the coil runs slightly warmer than the left one.
Right flipper turns weak after a few games: the coil, even though it measures fine
Cause: The flipper coil itself, although its resistance and diode tested within spec.
Checks
- Swap the opto boards side to side to rule them out.
- Swap the suspect coil with a matching coil on another flipper and see if the weakness moves.
Fix
- Replace the flipper coil with the correct type (FL-11629 on this game).
Systems
Games
Related tips
- Williams flipper coils from weakest to strongest
- WPC flipper coils from weakest to strongest
- Williams 50 V fat flipper coils ranked by strength
- WPC flipper coils, weakest to strongest, with resistances
- Flipper coil strength order (WPC flipper coil strengths file)
- WPC flipper coils, weakest to strongest
- Pinball Magic can be converted to Williams flipper mechanisms
- Games that came with Type 2 flipper opto boards
Source: Pinball Repair help group!! (Facebook group)