Pinball Troubleshooting/obsolete parts

Ohmerone

Well-known member
Joined
Oct 3, 2009
Messages
3,364
Reaction score
296
Location
North Miami, Florida
Sticky Worthy?
You Vote!!

Got any Pinball trouble shooting Technique's
and Parts NLA

Soprano's Black Hair Doll..

Tip's: if a mechanical circuit doesn't work
then the electrical circuit can't make it work either
so checking the coils move freely and springs, EOS switches and levers work
would be a good idea first..so lifting the playfeild and check
all the mechcanical parts first would save from burning up mosfet's,coils
blowing fuse's over and over and damaging trace's.

Mosfets Transistor on the I/o power board
don't usally go bad by themselfs, something cause's
them to fail from my experience.

Is tapping the tab of the mosfet transistor with
a jumper to ground hurt the mosfet or is it a good way
to check a analog circuit without involving the digital circuit?



Using a circuit breaker first, in place of a fuse would save
from wasteing fuse's and the money to replace them.

Using a incondesent bulb in place of a coil would
help in deciding if the mosfet is leaky or shorted or being turned on
by either the shorted ic on logic board or a stuck playfeild switch..
A barely lit bulb inplace of a coil means the coil is being energised
when it shouldn't be..
What to check?

Are {pinball machines} like CD players,8 track tapes etc, Obsolete NOW
in arcades?

Are pinball machines so easy to fix that we don't need a Sticky
with tips and tricks?
 
How Many seconds do i have before my Solenoid Burnsup?

Elvis Pinball repair LOG
Upper
Right flipper stuck on!!
At turn on..sometimes.


During solnoid test the flipper test good pulsing good
Action taken: did a continuity test across the outside switch
for upper right flipper switch was to close i adjusted it by bending the
outer part of sw and tested Good, solenoid was warm but still working..
Luckly the coil is still OK..

Hotel Lock release was working ok after i replace the coil/bracket
the whole bracket was missing the stop part of bracket..
play a few games then smelt burning and solenoid was burning up
seconds going by,
DO I HAVE TIME TO Test the voltages at the transistor
I only have a few seconds before the coil is gone..
The playfield sw tests good!!
My coil is burning up right now!!!

Action taken: Turned off game, I hookup a light bulb where the coil was
by removing the 50v side wire then hooking up to one side of bulb
and the other side i hooked to the other side of coil.
now when i turn on game my bulb is lit
i went to the related mosfet for it,turn game off, didn't have a short
at the tab of trans,turn game on, had 1.5v dc there,i remove the transistor
installed a new one, solenoid is working ok now,must have been a leaky
Mosfet..
 

Attachments

  • IMG_20120601_085430.jpg
    IMG_20120601_085430.jpg
    86.9 KB · Views: 6
Back
Top Bottom