U3022AH10
Troubleshooting the Test Set
Figure
60
DC Power Status LEDs
d. If there is still no AC power, suspect the Power Supply Module. The actual power supply
terminal connections should also be checked with a DVM by removing the bottom cover
and using the power supply label to identify the terminal voltage values.
e. If all DC voltage input LEDs are ON, but the fan is not, replace the fan.
4.
Front Panel R and S Indicator LED check.
a.
If these indicators are not operating, you should perform the first steps of the RF troubleshooting
checklist.
5.
Control Lines of DUT Control Board are not working.
a.
Verify that the control voltage pin connections to the DUT control lines are connected properly.
b.
Verify that the rear panel DC voltage control adjustment can be set to 5 Vdc. Refer to
RF Switching Malfunctions
If the Test Set RF signal functionality is not operating properly, use the following checklist to aid in
isolating the source of the malfunction. Typical malfunctions may be a loss of RF switch control failure
and/or a non-RF failure as outlined in the previous section. The internal RF switches used in this
instrument are controlled by the +21 Vdc voltage from the switch driver board.
1.
The PNA and the Test Set need to be connected together with the Test Set I/O cable
(
N4011-21002
).
2.
Verify the Test Set I/O cable is installed correctly. See
78
U3022AH10 User's and Service Guide
