Keysight Technologies U3022AE10 User's And Service Manual page 79

U3022AE10
Troubleshooting the Test Set
5. Front Panel R and S indicator LED Check.
6. Control Lines are not working.
Keysight U3022AE10 User's and Service Guide
a. Verify the test set Controller board Controller Status LEDs, shown in
on page 78.
b. If none are ON, remove the Switch Driver board and recheck. If still no
indication, replace the Controller board.
c. If the Controller Status LEDs are ON and the front panel Active LED is ON,
suspect the front panel LED boards or the ribbon cables. Replace as needed.
a. Verify that the control voltage pin connections to the DUT control lines are
connected properly. Refer to
b. Verify that the rear panel DC voltage control adjustment can be set to 5 Vdc.
Refer to Figure 5 on page
"Control Lines" on page
19.
Figure 63
54.
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