Agilent Technologies XX3625 Service Manual page 94

Chapter 5: Troubleshooting
To check probe power outputs
Use the table and figure to the right
to check the power output at the
connectors.
The +12 V and –12 V supplies
come directly from the power
supply, and the +3 V and –3 V
supplies are developed in
three-terminal regulators on
the probe power & control
assembly.
Measure the voltages with respect
to the ground terminal on the front
panel, located near the Aux Out
BNC.
Do not attempt to measure voltages
at pins 3 through 7.
Pin Supply
1 +3V
2 –3V
3 Offset
4 Data
5 & Probe ID
ring
6 Clk
7 R
p
8 –12 V
9 +12 V