Dirty Harry - no low-power hold voltage upper right side flipper

modessitt

Volunteer: Encyclopedia Submission Moderator
Joined
Mar 22, 2007
Messages
33,414
Reaction score
325
Location
Austin, Texas
Dirty Harry - no low-power hold voltage upper right side flipper

So, what causes this? Flipper fires over and over continuously when right flipper button is held in. Goes up, falls back down, goes back up, falls back down, repeat, etc.

So, obviously I have the high power voltage to fire the coil, and the EOS is working as it cuts out the high power and causes the flipper to fall back before it breaks the EOS and fires again. Obviously the low-power hold voltage isn't keeping the coil engaged.

I've already swapped in a known-working flipper control board with no change (and all fuses are good). Even tried swapping the optic board at the flipper button just in case. I've inspected the coil and the wiring and haven't seen any issues (unless it's internal to the coil or the insulation). Could this be a coil problem, or do I need to do continuity testing all the way through to see where my problem is?
 
If the EOS switch is wired correctly and properly adjusted then yes the coil is the problem.
Check the real small wires on that coil,The ones going from the coil to the coil lugs.They break
off sometimes and need to be resolder back together.Also check the opto on the flipper board
in the cabinet.Put the game in switch test and push the flipper button and see if that opto is
registering correctly on the screen.
 
Last edited:
If the EOS switch is wired correctly and properly adjusted then yes the coil is the problem.
Check the real small wires on that coil,The ones going from the coil to the coil lugs.They break
off sometimes and need to be resolder back together.Also check the opto on the flipper board
in the cabinet.Put the game in switch test and push the flipper button and see if that opto is
registering correctly on the screen.

I already checked the coil lug wires, as that usually causes fluttering, but this is not fluttering. The timing is similar to when Thing Flips on TAF, if you are familiar with that.

I've already tried swapping the optics at the flipper button with the opposite side with no change.

I guess I need to measure the voltage at the coil lug to see if the low-voltage is getting there. If so, I'll replace the coil. If not, I'll check the wiring...
 
Back
Top Bottom