Odd flipper tomfoolery with Elektra.

[HomerRamone]

Started seeing this a couple of days ago. When the game switches to the lower PF pressing the left flipper makes the lower flipper fire. But it also makes the right lower PF one and the left bottom main flipper fire too.
Just to keep it interesting the main p/f flipper only pulses - doesn't stay flipped but the lower one does.
Thought maybe someone is up with the solenoid expander - since this is what switches to the lower flippers.
Just guessing though.
Anyone any thoughts ?

 

[TonySchwager]

Hi Homer,
Hope you got this fixed, if you have not seen this it may help
This guy knows what he is talking about (unlike me) see about 35 mins in for the expander
Total guess but has is the bulb there blown

 

[Pick Holder]

EOS switches?
Bad coil?

 

[Pick Holder]

Also the guy on that video - has not checked for cold solder joints (or did I miss that) on the relay.....

 

[HomerRamone]

Meant to reply to this.. But didnt. I grabbed an expander from flea bay anyway.
The coils are only a couple months old - and I replaced the EOS switches too. So I was fairly sure it wasn't those.
Turns out it wasn't - it was one of the 2 large diodes on the underside of the playfield. Replaced the dead one and flippers are now behaving as expected.
Well almost - the right lower (main flipper) seems to be "pulsing" - which I suspect is the EOS switch.. needs adjusting I think.

 

[AlanJ]

what do you mean by "pulsing"?

 

[HomerRamone]

Press the flipper button, flipper pulls up, drops as soon as it reaches fully flipper, pulls up again, drops again etc. Only really fast
Doesnt do it all the time - which is why im assuming its the EOS switch. (Just not had a proper look yet)

 

[AlanJ]

Sounds like one half of the flipper coil is open circuit - i.e. its flipping ok so the first part of the coil is working, then it hits to EOS that opens the short circuit of the 2nd part of the coil, but if that is open circuit, then the first coil loses power and the flipper drops. Until the eos closes again restoring power to the first part of the coil.

Test it out with a DMM - if its open circuit you wont get a reading one way (there is a diode across the coil, so test both ways - if get readings both ways the coil is ok, if only one way then it is open)

 

[BigIan]

not familiar with this machine, but it sounds like the hold circuit is missing (if it has one) look for breaks in the winding on the coil

Sounds like the eos is doing its job, ie cutting out the high power when the flipper gets up but the hold circuit (much lower power) isnt cutting in. made more difficult by the expander board cutting between upper and lower flippers. can you swap the connections so the right flipper controls the left and see if the problem moves or stays.