The game reports a row 1 short and fuse F114 blows straight away; the switch matrix and insert lamps are dead. A different CPU board and checks of the row 1 switches change nothing.
Row 1 short error and F114 blows at once: fault in the 18 V lamp supply
Cause: F114 protects the 18 V lamp matrix supply, and the switch matrix's 12 V is derived from it, so a fault there kills switches too. Here the fault was in the 18 V section of the power driver board (where BR1 had recently been replaced).
Checks
- Unplug the lamp connectors: if F114 still blows, the fault is on the board, not in the playfield.
- Swap in a known-good power driver board from another game of the same generation.
Fix
- Repair the 18 V section of the power driver board: recheck the soldering on BR1 and the parts around it.
The power driver board carries high voltages; work with the game unplugged.
Systems
Games
Related tips
- Driver board LED6 off (+18 V lamp matrix)
- Trace the 12 V switch supply with the playfield disconnected
- Live voltage checks for the F114/F115 message
- Pre-WPC-95 bridges, filter caps and fuses by supply
- Driver board LED1 off: switch matrix 12 V missing (WPC-S and earlier)
- Driver board LED6 off: lamp matrix 18 V missing (WPC-S and earlier)
- Shorted or open bridge rectifiers
- +20 V filter capacitor C11 (C10 on WPC-95) blows apart
Source: Pinball Repair help group!! (Facebook group)