The top right kickout coil cooked and melted its sleeve, though it gets the same 25 V as the other coils.

Kickout coil melts its sleeve: shorted transistor on the transistor board

Cause: Transistor Q2 on the transistor board, which drives that kickout, had shorted and held the coil on.

Checks

• Test the drive transistors for that coil on the transistor board.

Fix

• Replace the shorted transistor and the damaged coil and sleeve.

Systems

• Gottlieb System 80B

Games

• Diamond Lady

Related tips

• Driver transistor keeps failing on the same coil
• Coil sleeves by mechanism
• Replace a shorted coil before firing a repaired driver
• Test an under-playfield 2N5875/2N5879 coil transistor

Source: Pinball Repair help group!! (Facebook group)