The flipper coil gets very hot and may stay up.

Fliptronics: flipper burns and smells, often stuck up

Cause: The hold TIP102 for that flipper is shorted on.

Checks

• Test the hold TIP102.

Fix

• Replace the hold TIP102, and its pre-driver and diode.

Systems

• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Fliptronics flipper coil wired wrongly
• Fliptronics: flipper will not hold up (flutters)
• Fliptronics II board components
• Flipper energizes and stays up at power-on or game start
• How Fliptronic flipper drive works
• A coil or flasher comes on and stays on at power-up
• Lock diverter locks on at power-up and gets hot: shorted driver transistor Q22
• STNG: diverter coils lock on during play

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)