The outhole kicker, a drop target reset, both slingshots and the pop bumpers all fire weakly, even after the mechanisms were serviced; about 45 V is present, dropping to about 38 V when a coil fires.
Several coils weak at once: a fuse that tests good but limits current
Cause: The 1 A fuse that feeds solenoid power on past the flippers tested good with a meter but was not passing full current.
Checks
- When many coils on one feed are weak together, suspect the shared fuse, fuse clips and daisy-chain joints rather than each coil.
- Temporarily bypass the suspect fuse with a correctly rated breaker or fuse clipped across it to see if full power returns.
Fix
- Replace the fuse with a new 1 A slow-blow fuse and clean the fuse clips.
Systems
Games
Related tips
- Playfield coil fuse blows at power-up: shorted outhole kicker coil
- Maze lights flicker or go dark when flippers fire: loose fuse holder
- Pop bumpers and slings die minutes after a driver board swap: playfield fuse
Source: Pinball Repair help group!! (Facebook group)