Ok, decided to go back and recheck all my voltages and document them here a little better.
With P100 disconnected, and everything else connected:
Pin |
Expected |
Actual |
1 |
+33V DC |
+33V DC |
2 |
Not Connected |
Not Connected |
3 |
~ +25V DC |
+26V DC |
4 |
~ +25V DC |
+26V DC |
5 |
~ -25V DC |
+8V DC |
6 |
~ -25V DC |
-26V DC |
7 |
-33V DC |
-33V DC |
As you can see Pin 5 is WAY wrong. What's even stranger is, that Pin 5 should be a NEGATIVE voltage, but it's Positive!
After disconnecting P700 and P600, here are the results I got:
Pin |
Expected |
Actual |
1 |
+33V DC |
+33V DC |
2 |
Not Connected |
Not Connected |
3 |
~ +25V DC |
+26V DC |
4 |
~ +25V DC |
+26V DC |
5 |
~ -25V DC |
+15V DC |
6 |
~ -25V DC |
-26V DC |
7 |
-33V DC |
-33V DC |
We're getting closer, so something else further down in that circuit appears to be pulling the voltage down.
Now I disconnected P101 and the voltage dropped to 0!
Pin |
Expected |
Actual |
1 |
+33V DC |
+33V DC |
2 |
Not Connected |
Not Connected |
3 |
~ +25V DC |
+26V DC |
4 |
~ +25V DC |
+26V DC |
5 |
~ -25V DC |
+0V DC |
6 |
~ -25V DC |
-26V DC |
7 |
-33V DC |
-33V DC |
Not what I would have expected to happen... but it could be related to the +/- Voltage issue too. Will have to look at the HV section and see what that is connected to.