Keysight Technologies N5290/1A PNA Series Service Manual page 106

N5290/91A Troubleshooting
N5292A Test Controller Troubleshooting
6. Verify the test set is powered down: On the A1 power supply, verify the
wires are correctly seated. Refer to
If the wires were not connected correctly, reconnect, power up the TSMB,
and recheck the power supply test fixture voltages shown in
page
7. If the power supply cables are seated correctly: Power down the test set
and connect the power supply fixture (ET57265, N5292-60130). Power up
the test set and perform the voltage checks in
Operation."
Power Supplies Check (Heater Dac/Voltage)" on page
8. If the power supply voltages are OK, but the power supply fixture test
points are incorrect, proceed to
Connectors, Cables, and Voltages" on page 4-16
Else, if the A1 power supply is determined to be faulty replace it. Refer to
Chapter 7
4-20
4-18.
And, then refer to,
and "Removing the Cover" on page
Figure 6-18 on page
Chapter 5, "Theory of
"Millimeter (mm) Head Heater DAC and
"Verifying A5 Test Set Motherboard
7-8.
Keysight N5290/1A Service Guide
6-35.
Figure 4-8 on
3-26.