Moving the spare opto on a flipper opto board (two-flipper games)
Steps
- Mark the bad opto and its position.
- As a rule the opto furthest from the board's two resistors serves the lower flipper.
- Desolder the pair and fit the working one in the marked lower-flipper spot.
- Expect the game to report the unused opto as a bad switch at power-on; some games also use that switch to scroll high-score initials. Replacing the bad opto is the better fix.
Systems
Related tips
- Type 1 and Type 2 flipper opto boards
- Games that came with Type 1 flipper opto boards
- Games that came with Type 2 flipper opto boards
- Coil sleeves and flipper rebuild spares
- Two LM339s on the Fliptronics board read the flipper optos
- How Fliptronics flippers work
- How Fliptronic flipper drive works
- Flipper coils have two windings
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)