Thin wire on J120 adds to burning on WPC-S
On WPC-S games the wire on GI output J120 is much thinner than on J121, so J120 is a frequent burn point. Inspect it closely.
Systems
Related tips
- Two wires on one GI pin
- J115 wire colors on games before Twilight Zone
- J115 wire colors from Twilight Zone on (Corvette example)
- Backbox GI out while flashers work: burnt connectors at J120 and J121
- Trough eject and left sling dead together: reseat the CPU to driver ribbon
- Slingshot also fires an outlane magnet: ribbon cable not fully seated
- Kicker dead in coil test plus a lamp row and column out: reseat the CPU to driver ribbon
- GI string dead with a scorched connector
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part One, Clay Harrell (pinrepair.com)