A game with a history of previous repairs shows many unrelated faults: pop bumper boards burnt, scoring problems, and the ball release coil blowing its fuse.

Odd faults after an earlier repin: switch connector wires in the wrong slots

Cause: Someone had repinned the switch matrix connector with several wires in the wrong positions. That probably fed voltage where it did not belong and burnt the original pop bumper driver boards. A broken wire was also behind the ball release fuse blowing.

Checks

• Compare every wire position in previously repinned connectors with the manual's wire colours.
• If a coil's fuse blows instantly and the coil never moves, measure the coil for a short (clip the diode and measure again), then look for broken or shorting wires.

Fix

• Repin the switch matrix connector correctly, replace the damaged pop bumper boards, and repair the broken wires.

Systems

• Gottlieb System 80B

Games

• Spring Break

Related tips

• Pop bumper driver board 6-pin connector

Source: Pinball Repair help group!! (Facebook group)