My F-14 Tomcat pin shows "Adjust Failure" whenever the power switch is turned on. A Google search pointed to this being a System 11 way of telling you that the game is not getting power to the U25 RAM chip when the game is off and, thus, not able to retain settings, high scores, etc.
I replaced all three batteries and the battery holder doesn't show any signs of leakage or damage but this didn't fix the problem. I'm able to clear this using the black advance button inside the coin door but once it's powered off and back on the adjust failure comes back.
From a Pinside Member;
The power runs from the batteries to 1N4148 diode at D2 and then on to the U25 RAM on System 11 Williams games. Sometimes the “Adjustment Failure” reading can be as easy as just replacing the batteries, sometimes a bad diode at D2, or a bad U25 RAM chip. Sometimes, however, it’s loss of continuity between components or a bad battery holder. For this F-14, the battery holder was the culprit. It was pretty brittle and beginning to actually fall apart.
Assuming my holder and batteries are good what's the fix for this? I'm not an electronics repair kind of guy so I'm kind of useless in this area.
Thanks
Dennis