To Check Probe Power Outputs - Keysight 9000 Series Service Manual

Chapter 4: Troubleshooting

To check probe power outputs

Probe power outputs are on the front panel, surrounding each BNC input.
Use the table and figure to the
right to check the power output
at the connectors.
The +12 V and –12 V supplies
come from ripple regulator
on the power board, and the
+3 V and –3 V supplies are
developed in three-terminal
regulators on the probe
power and 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.
Any failure may be a problem with the probe power and control assembly, the AutoProbe flex cable,
the probe power and control cable, or the power board.
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
To check probe power
outputs
79