got me another pin.. Bally Eight Ball

cueball

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I must say that this game is my arch nemesis.. I play it occasionally during my pinball league and I suck at it.. But I found a good deal and am determined to get better at it..

the problem is, right now only the playfield lights up.. i havent had time to check it (heck its still in my Buick Rendezvous).. but i will check it out this weekend. I did notice a wire or two was no longer soldered here and there.

i will put up pics when i get it in the house..
 
Here are some pics.. there was a disconnected wire on a coil in the back box.. dont know what it is for, but i soldered it back on.. may be bad, as now i am blowing fuse F4.. time to look at the part#s and start figuring out the issue..

here are some pics
8ball4.jpg

8ball3.jpg

8ball2.jpg

8ball1.jpg
 
The knocker coil is in the backbox. Probably that coil is bad (shorted or burnt up) and that's why a wire was unhooked from it. That way the game will run without the knocker and not blow a fuse.

There was a service bulletin about the schematics having an error in the coil schematic. A fuse was left out of the diagram.
 
thanks for that tip Ken.. i desoldered the wire for now.. will add that coil to the parts order.. i checked out the power supply and the following were the readings:
TP1 (feature lamps) 6.4 vdc.. (range 4.6 to 6.2, so it is a bit high)
TP2 (score displays) 182.6 vdc (range 203-257, so it's low)
TP3 (logic circuits) 12.7 vdc (within range)
TP4 (general lighting) -2.3 vdc (range 6.3-8.3, so it is way low)
TP5 (coils) 46.7 vdc (within range)

now the question is, would it be of any value to test the solenoid board/voltage regulator board and/or the mpu? or would it be better to rebuld the power supply first and get readings within range? I am just trying to be able to order the parts that I need all at once so I can fix all issues at once.
 
well, all is good so far.. a wonderful order received from Bob Roberts (with moon pies), and with one 5101 ram chip, the game is running. it looks like i need to order a couple of coils (knocker and kickout coil), but I will place that order this week when i order the rubber rings as well.
 
thanks for that tip Ken.. i desoldered the wire for now.. will add that coil to the parts order.. i checked out the power supply and the following were the readings:
TP1 (feature lamps) 6.4 vdc.. (range 4.6 to 6.2, so it is a bit high)
TP2 (score displays) 182.6 vdc (range 203-257, so it's low)
TP3 (logic circuits) 12.7 vdc (within range)
TP4 (general lighting) -2.3 vdc (range 6.3-8.3, so it is way low)
TP5 (coils) 46.7 vdc (within range)

now the question is, would it be of any value to test the solenoid board/voltage regulator board and/or the mpu? or would it be better to rebuld the power supply first and get readings within range? I am just trying to be able to order the parts that I need all at once so I can fix all issues at once.

TP4 is 6-8 VAC, not VDC, so maybe you measured it without setting your DMM to read AC? Everything else is close enough that I wouldn't rebuild the power supply just yet. Check the high voltage test points on the solenoid driver board and see what you get there.
 
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