N5292A Test Controller Troubleshooting; Power Supplies And Fans - Keysight Technologies N5290/1A PNA Series Service Manual

N5290/91A Troubleshooting

N5292A Test Controller Troubleshooting

N5292A Test Controller Troubleshooting
STOP! This chapter assumes you have performed the N5290/1A system
checks in
the N5292A test set as the problem instrument. If you have not isolated
the N5292A test set as the problem, then go back and perform the checks
in
N5292A test set controller troubleshooting can only be done by
Keysight-trained personal for procedures such as S-Parameters and
voltage checks and are not intended for N5290/1A system
troubleshooting.
If the Test Set is not operating properly, use the following procedures to aid in
isolating the problem. Refer to the
Procedure" on page

Power Supplies and Fans

1. Verify the front panel switch is operational:
2. AC Line voltage checks:
3. Internal DC Power checks.
4-6
Chapter 3, "System Tests and Adjustments,"
Chapter 3.
3-16.
a. When the front panel switch is off, the LED should be amber.
b. When on the front panel DC Power LED should be on (white) when
the front panel switch is in the on position.
a. Ensure the proper AC line voltage is present at the instrument line
cord.
b. Remove the AC power cord from the instrument.
a. Set the front panel power switch to OFF (LED is amber).
b. Remove the cover and connect the AC power cord. No fans should
be on. Some DC LEDs should be on the test set mother-board
(TSMB).
c. Set the power switch to the on position (LED is white). Both internal
power supply fans should be operational; the front panel DC Power
LED should be on. If the DC Power LEDs are off, measure the
+3.35Ds VDC pin on F6 and the+3.35Ds VDC pin on J11. Refer to
"Verifying the A5 Test Set Motherboard (TSMB)" on page 4-9
"Verifying the A1 power supply" on page
"N5292A Functional Verification
4-17.
Keysight N5290/1A Service Guide
and have isolated
and to