I have a Cleopatra SS that I am working on and I am running into a display problem which seems to be power related.
Following the steps on the pinrepair site (http://www.pinrepair.com/sys1/index.htm) I have checked the power levels on the power supply board and discovered that my 60 and 42 volt connections are low. The 60 is reading at 43.8 and the 42 is reading at 25. The top power connector, to the CPU (5 and 12), is good and reading right where they need to be. The issue is limited to the 60 and 42 volts on the side connection.
I tested the power cable (A2J1 I believe) that feeds the power supply board and the problem exists at that point, which takes the power supply board itself out of the equation as the source of the problem. I don’t think there is anything else between the small transformer and the power supply board that can cause a problem.
If that is true then it means that my small transformer (B-17921) is no good. I have looked for a replacement and I cannot find one available anywhere. Does anyone know if a system 80 transformer will work in a system 1? I saw a small transformer from a Counterforce machine (#B19548) for sale but I don’t know if it will work as a replacement for the small transformer that originally came with Cleopatra (B-17921) as I cannot find a schematic for Counterforce to see how the power pins out.
Is there another suitable replacement transformer that I can put in its place to try and correct the power issue?