Elektra
Bally, 1981You're currently viewing posts by Pinsider bcg1976.
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Hi All,
Right flippers working, bottom playfield flippers working, left flippers not working on main playfield.
Power to coils, button works, new rottendog solenoid driver board, have reseated everything including repressing the wires on the connectors for the flippers at the driver board.
I'm still new to pinball repair so would appreciate any further tips.
Thanks,
Brad
Quoted from zacaj:Check the diodes for the upper/lower PF. not the ones on the coils, but there's some secondary larger ones mounted to the PF and wired to the flipper coils.
Thanks all!
What are the values for these ones? There are two there and one may be the culprit now you've mentioned it. The numbers on the diode seem to have disappeared with age.
Sorry for the slow reply.
Elektra and I have been in different states.
Well I clipped off and tested those diodes. Joy of joys, one was completely non conductive in both polarities and the other was conductive in both. Wonderful, replaced them and expected left flipper action. Still not working!
Have included pictures of the resoldered diodes in case I've still got the polarity wrong along with one of the flipper coils that refuses to work.
And pictures of dead diodes.
Any other suggestions?
Thanks for your help so far.
IMG_20181011_155007 (resized).jpgIMG_20181011_155253 (resized).jpgIMG_20181011_161732 (resized).jpgIMG_20181011_161744 (resized).jpgIMG_20181011_161810 (resized).jpgQuoted from zacaj:Looks like a bad EOS switch on that flipper.
Multiple things wrong with the same symptom... As that diode fell apart in my hands...
So the first one is low voltage and the second is EOS?
My thinking was that the first one changed to low voltage and then the second was EOS. So they should both be normally open.
Or am I wrong?
Quoted from bcg1976:Multiple things wrong with the same symptom... As that diode fell apart in my hands...
So the first one is low voltage and the second is EOS?
My thinking was that the first one changed to low voltage and then the second was EOS. So they should both be normally open.
Or am I wrong?
Looking at the picture again, the first one should be closed so the cam can open it on the way through to then closing what I gather is the low voltage coil switch.
Am I getting warmer?
Quoted from BigAl56:You cannot use ordinary diodes for the flipper series diodes. Those special diodes in series are there to prevent cross wiring when the lower playfield is in use. They need to handle high current. A normal 1n4004 will fry in an instant when flipper current is put through them.
Ok, thanks. What sort of current should it be rated at?
Quoted from wayout440:3A
[quoted image]
Thanks for everyone's help.
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Launceston
O'fallon, MO