This isn't a help request but just a repair logged for future reference in case anybody has the same issue.
My Bally Vector had a permanently enabled flipper relay. This meant that the flippers worked even in attract mode and also when the game was tilted.
I first checked the driver transistors on the Solenoid Driver Board. Q15 was locked on so I changed that. That didn't fix the problem (but obviously needed replacing).
I then tracked the problem further back and found that the transistor array chip at U4 (a CA3081) was causing the transistor to be permanently on. Fortunately the chips were socket on my machine so I tried swapping two chips over (there are three) and sure enough the problem switched to a different coil bring permanently energised.
I fitted a new CA3081 and now everything is tickety boo.
My Bally Vector had a permanently enabled flipper relay. This meant that the flippers worked even in attract mode and also when the game was tilted.
I first checked the driver transistors on the Solenoid Driver Board. Q15 was locked on so I changed that. That didn't fix the problem (but obviously needed replacing).
I then tracked the problem further back and found that the transistor array chip at U4 (a CA3081) was causing the transistor to be permanently on. Fortunately the chips were socket on my machine so I tried swapping two chips over (there are three) and sure enough the problem switched to a different coil bring permanently energised.
I fitted a new CA3081 and now everything is tickety boo.
Last edited:
