The flipper coil gets very hot, may smell and stick in the up position.

Pre-Fliptronics: flipper runs very hot or sticks up and burns

Cause: The EOS contacts are not opening at full stroke, or the EOS spark capacitor has shorted.

Checks

• Check the EOS opens 1/16" to 1/8" at full stroke and that its contacts are clean.
• Check the capacitor across the EOS.

Fix

• Adjust and file the EOS switch; replace a shorted capacitor.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix

Related tips

• Pre-Fliptronics flipper coil wiring
• Pre-Fliptronics flipper coil smokes when held up
• Measuring a pre-Fliptronics flipper coil and its EOS switch
• New flipper coil overheats and burns
• Pre-Fliptronics: weak flipper
• Pre-Fliptronics games need a driver board with the flipper relay
• Pre-Fliptronics: a flipper does nothing
• Flipper stuck up and stays up with the power off

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