After a lamp socket touched a playfield switch, a third of the switches stopped working, then no coils fired and F112 blew at power-up. With connectors isolated, F103 blew when the supercharger board was connected.

F112 then F103 blow after a socket shorted a switch: isolate to the supercharger board

Cause: The short damaged parts on the supercharger (ball accelerator) board and a capacitor on the power driver board.

Checks

• Move any lamp socket or wire touching a switch, then check every fuse against the fuse chart inside the backbox (the manual can be wrong).
• Unplug the driver board's connectors and reconnect them one at a time, powering up between each, to find the circuit that blows the fuse; then do the same at the far end of that harness.
• With the supercharger board disconnected the rest of the game should play, which confirms the fault lies there.

Fix

• Repair the supercharger board (replace its damaged chips) and replace the failed capacitor on the power driver board, then fit correct fuses.

Do not keep fitting larger fuses to stop one blowing; find the short first.

Systems

• WPC Fliptronics

Games

• The Getaway: High Speed II

Related tips

• F111, F112 or the line fuse keeps blowing
• A coil keeps firing at power-on and the DMD is blank
• Isolate which part blows F114 or F115
• Switch matrix fuse F115 (F101 on WPC-95) blows as soon as it is replaced
• "Check Fuse F114/F115" (F106/F101 on WPC-95): step-by-step
• WPC: fuse holder snaps off the power driver board: replace the clips properly
• Auto-launch fires weakly but full power when the transistor is grounded
• WPC power driver board fuses and what they feed

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