Whenever the hologram lamp comes on (with the bright 1156 bulb fitted), the left flipper goes very weak or stops working. With a smaller bulb the flipper is fine.
Flipper goes weak when the hologram lamp lights: flipper opto board
Cause: A marginal flipper opto board, with cold solder joints around its resistors, drops out when the extra lamp load pulls the supply down slightly.
Checks
- Swap the left and right flipper opto boards: if the fault moves to the other side, the board is the problem.
- Inspect the opto boards for cracked joints around the resistors, and check the connector pins for voltage drop.
Fix
- Reflow the solder joints on the opto board, or replace the flipper opto boards.
Systems
Games
Related tips
- Right flipper weak only while the hologram lamp and mirror run: colour display load
- Games that came with Type 1 flipper opto boards
- Hologram lamp dead: its 12 V wire is loose at the flipper opto board
- A flasher lights up whenever other coils fire: try an incandescent bulb
- Upper flipper sometimes weak, then buttons dead after cleaning: replace the flipper optos
- Fliptronics flipper does not work: test the flipper opto board
- Flipper coil gets very hot: marginal flipper switch reading
- Weak or dead flippers from failing LM339s on the Fliptronics board
Source: Pinball Repair help group!! (Facebook group)