After LED bulbs were put in the flash lamp sockets, the flashers stay on all the time.
Flash lamps stay lit after fitting LED flashers: System 11 warming resistors
Cause: System 11 games feed a small warming current through resistors to keep incandescent flasher filaments warm. That current is enough to light an LED.
Checks
- Put an incandescent flasher bulb back in; if it behaves, the LEDs are the cause.
Fix
- Go back to incandescent flasher bulbs, or remove the warming resistors for the LED flashers following a System 11 LED flasher guide.
Systems
Games
Related tips
- Special solenoids dead after fitting an early System 11 CPU in a later game
- Center eject dead and solenoid fuse blows at power-up: shorted coil and drive transistor
- Flashers out on any System 11 game: R2 desoldered itself
- How the System 11 flash lamp circuit works
- Flashers dead on early games: resistors broken on under-playfield flasher boards
- Where the flash lamp resistors are by era
- C-bank coil or flasher not working
- #89 flasher very bright or keeps burning out: it is a 50 V circuit
Source: Pinball Repair help group!! (Facebook group)