Freshly fitted #89 flasher bulbs flash once and burn out.
New #89 flashers flash once and blow: replace every dead bulb in the group
Cause: Several flashers share one 32 V circuit with a power resistor (about 3 ohms). When some bulbs in the group are dead, the remaining ones get more than their share of voltage and blow.
Checks
- Find which flashers share the circuit (the manual's lamp/flasher chart shows the groups).
- Check every bulb in that group, not just the one you replaced.
Fix
- Replace all burnt-out bulbs in the shared group at the same time, then test.
Systems
Games
Related tips
- WWF Royal Rumble and later: no coils work with the coin door open
- Several bank-switched coils or flashers dead, or firing the wrong device
- Flash lamp resistors on the PPB drop solenoid voltage for 12 V bulbs
- All L or all R bank coils/flashers dead: PPB relay K1
- L/R relay burnt or intermittent
- A coil or flasher comes on and stays on at power-up
- Flasher fuse blows the moment a game starts: flasher socket touching a GI socket
Source: Pinball Repair help group!! (Facebook group)