System 11B flippers and Solenoid getting weaker the longer you play.

[beaky]

I had a problem with my Bk2000, as the pin warmed up all the solenoids and flippers seemed to get weaker, I cleaned all plungers and replaced all sleaves and no change.
I then put a fan behind the pin so it blew air into the vents, they seemed a bit stronger but not as strong when the pin was first turned on.
Next step was to replace all the capacitors and bridge rectifiers on the aux driver board, after i refitted the board into the pin not only do the solenoids and flippers stay strong they are stronger than what they where before the repairs.

I checked all the old components with a multimeter and they checked out fine. so i heated the bridges up with a hair drier and found both bridges increased there forward voltage drop across  one of the internal diodes

problem solved.

[Strangeways]

Interesting - So it was simply a case of replacing the BRs ?

[beaky]

Interesting - So it was simply a case of replacing the BRs ?

yep sure was. I had a pair of 40 Amp bridges so i used them for the job. The originals where only 35 amp but i have had the 40 amp ones sitting around for about 6 years but they had never been used and they where brand new when i bought them