Eight Ball
Bally, 1977I have a Bally 8 ball machine I am working on. The lost ball back solenoid kicker that pushes the ball back to the plunger. I cannot figure out where the wire is supposed to go. The wire on the solenoid is brown and yellow I have no idea where it goes. Hopefully that is the issue. Any assistance to where on what board that goes would be helpful.
Awesome Forum
Joe
Quoted from jrp758:The lost ball back solenoid kicker that pushes the ball back to the plunger. I cannot figure out where the wire is supposed to go. The wire on the solenoid is brown and yellow I have no idea where it goes
I'm confused. There should be 2 wires attached to the solenoid. The yellow wire is usually the power wire. It should show +/- 43VDC and be attached to the banded side of the diode. The diode connects the two lugs and the banded side has a white ring on it. Looking at schematics, a solid green wire should be on the other solenoid lug. It connects to the SDB J5 pin 10. It grounds the solenoid when commanded by MPU and causes it to fire.
I neglected in a past post to mention where I got the schematic & manual
from the linked game Eight Ball ... click the IPDB link .... you can scroll down to get them.
the schematic isn't(?) paginated ( or it is I'm confused 
) so it makes it a bit more difficult to read.
I screen caped a bunch of stuff to try & take the mystery out of reading them
Bally Eight ball (resized).jpgIt appears that you have the brown/yellow on the correct pin.
... you are talking about the "outhole solonoid" that kicks the ball into the "shooter-lane" correct?
There is an "side return kicker" that kicks the ball back into the playfeild on a left lane drain when lit ( a kickback)
Also could you verify the color wires on your "side return kicker" and your "bottom bumper" (pop bumper)
sigh: there is a service bulletin https://www.ipdb.org/files/760/Bally_1977_Eight_Ball_Service_Bulletin_Schematic_Errors_October_1_1977.pdf
There is a fuse between the flippers & the outhole kicker: Do you have an ohm meter to check that fuse? You will want to replace it with the correct value !!!! a 1 amp slow-blo
Quoted from jrp758:I currently have the fuse bypassed just connecting the two wires together while trying to get this to work. That wouldn’t be the culprit would it?
Just keep the fire extinguisher handy
do a solenoid test, check voltage across the lugs of the solonoid, ( probably under the apron ) if you get a voltage but the solonoid doesn't fire then you may have an open winding. (replace the solenoid)
if no voltage do a resistance check on the solenoid to see if it is shorted. .... if it did short I probably first blew the fuse then subsequently blew a transistor on the SDB
Think it's "Q4" on the SDB
Bally Eight Ball outhole SDB (resized).jpgWanna join the discussion? Please sign in to reply to this topic.
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Providence, RI