Indianapolis, IN
So I recently acquired this game, and discovered an erratic problem: the game would cut out during play and reset to zero. (Sometimes you could play 3 or 4 complete games first, sometimes would happen during first game) I cleaned all the fuse and CB side connections, did not help.
I thought it may be a ground issue so I tightened all the ground wire lugs on the chassis. I also removed the A2 power supply and reinstalled it after cleaning tabs/connectors as it looked rough.
Now when I turn game on it appears that solonoids are sticking and instantly it blows the 25 volt 5 amp fuse.
I read through the Pinrepair guide (GREAT INFO!) and Im NOT getting -12 volts on the CPU. After looking at the schematic I saw the Knocker sol. behind the BR. I then checked the knocker coil resistance (11) which was good, and the diode which was good. My next step was to check the 25 volt Bridge Rectifier (BR) which checked out OK, HOWEVER, the 6 volt one did not check out OK. The driver board transistors checked out ok.
QUE 1:
Would the 25 volt fuse blow due to the 6 volt BR being bad?
I would think it would blow the 6 volt fuse?
I have never changed a BR but looks like i will have to.
QUE 2:
See pic, what type of battery has been installed on the CPU? It does not appear to be original.
I plan on re capping and doing ground mods per Pinrepair guide but want to get machine back online first.
Oh and the sound is still broke...(My different post from earlier this month) Im gonna order a new sound board but am focused on this bigger issue now!
