After repairs the three backbox slot reels spin, but they do not sync up and they stop from right to left instead of in the normal order.
Slot reels run but don't sync or stop in the wrong order: reel boards and plugs swapped
Cause: The reel connectors had been mixed up between reels during the repair. The original faults were a transistor broken off one reel controller board, bad chips on the other two boards and a worn reel motor.
Checks
- Look under the backbox and cabinet for any part that has fallen off a reel board.
- Run the reels in test and note which reel stops first; compare with a known good game or video.
- Ohm out each reel motor before replacing it.
Fix
- Repair or replace the faulty reel board and chips, then swap the reel plugs until each reel is on its correct board and they stop in the right order.
Systems
Games
Related tips
Source: Pinball Repair help group!! (Facebook group)