Hi Guys - so,I am having a battle royale with my Royal Rumble....
I now have coil problems:
Flippers don't work. When I press the button, they buzz - if I manually move them up they stay up - I believe the 8v is working but the 50v is doing nothing.
The flipper board leds are not even flickering.
Now in parallel, when I enter diagnostics - no flashers work. and when I test coils and flashers, some coils fire when flashers should fire - Mainly the corresponding L/R Coil fires when I select the flasher.
Apart from the VUK that only fires when a flasher should fire...
I changed the Q28,29,30 transistors and pre-transistors - no change
I also own a maverick and I swapped the CPU & PPB board - no change.
So I don't think this this is a problem with the boards or with the L/R coil
anybody got any other ideas?
Next step, I am going to replace all the coil diodes - could it be a bad coil?
Thanks a lot in advance