A flipper coil gets very hot or burns when the button is held.

Pre-Fliptronics flipper coil smokes when held up

Cause: The normally closed EOS switch isn't opening at full stroke, so the power winding stays in circuit.

Checks

• Hold the flipper up and check the EOS contacts open.

Fix

• Adjust the EOS so it opens about 1/8 inch at the end of the stroke; replace the coil if damaged.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix

Related tips

• Pre-Fliptronics: flipper runs very hot or sticks up and burns
• Pre-Fliptronics flipper coil wiring
• Pre-Fliptronics: flipper flutters while the button is held
• Pre-Fliptronics: a flipper does nothing
• Measuring a pre-Fliptronics flipper coil and its EOS switch
• New flipper coil overheats and burns
• Pre-Fliptronics: flipper lane change does not work
• Flipper buttons not seen by the game (pre-Fliptronics)

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