The right flipper does nothing when the button is pressed, yet if the bat is lifted by hand with the button held it stays up. The left flipper works and the coil reads normal on both windings.
Flipper won't kick but holds if lifted by hand: dirty or worn EOS switch
Cause: The end-of-stroke switch on this game carries the power winding's current; its contacts were too worn and dirty to pass it, so only the hold winding worked.
Checks
- Measure both coil windings with the diode lifted to rule out an open winding.
- With the button held, bridge the EOS contacts with an insulated screwdriver or jumper: if the flipper kicks, the EOS is at fault.
- Check that the flipper's TIP102 driver is fine; both flippers share it, so a working left flipper rules it out.
Fix
- Dress the EOS contacts so they meet squarely, and replace the EOS switch (and the flipper rebuild parts) when parts arrive.
Systems
Games
Related tips
- Upper flipper weak and won't hold: second leaf switch on the lower flipper not touching
- GI dims whenever the left flipper button is held: upper left flipper EOS not opening
- Both right flippers dead with power present: dirty cabinet button contacts
- Solenoid fuse blows when a flipper is used: worn spacer in the EOS switch stack
- Flipper sometimes ignores the first button press: replace the EOS switch
- Upper flipper flutters, then dies: pitted EOS contacts
- Flipper machine-guns when the button is held
- Both right flippers dead, left works: wire at a coil lug not making contact
Source: Pinball Repair help group!! (Facebook group)