Agilent Technologies E8362B Service Manual page 96

Troubleshooting
Power Up Troubleshooting
6. Connect the display ribbon cable and display lamp cable from A2 to A3. Connect the
front panel interface ribbon cable coming from the analyzer to the A3 board.
7. Turn the analyzer on and refer to
"Verifying the A3 Front Panel Interface Board" on page 4-16
the boards.
Verifying the Inverter Board
WARNING High voltage is present on the inverter board and the A3 front panel
interface board. Be careful when measuring signals and voltages on
these boards.
1. To access the front panel boards for measurements, it is necessary to remove the front
panel assembly. Refer to
page 7-10.
Using Figure 4-5 as a reference, measure the signals and voltages indicated in
page 4-14. If the signals and voltages measure good, the inverter board is functioning
correctly.
Figure 4-5 Inverter Board Test Point Locations
Table 4-3 Inverter Board, Voltages and Signals
Test Point
CN1 pin 1
CN1 pin 2
CN1 pin 3
CN1 pin 4
After measuring the points CN1 and CN2, match the results and perform the rework as
indicated in the action column in
4-14
"Verifying the Inverter Board" on page 4-14
"Removing and Replacing the Front Panel Assembly" on
Signal or Voltage
+5.1 Vdc
+5.1 Vdc
39 mV
0 V (ground)
Table 4-4.
PNA Series Microwave Network Analyzers
to test and troubleshoot
Test Point Signal or Voltage
CN1 pin 5
CN1 pin 6
+400 V peak sinewave
CN2 pin 1
CN2 pin 5
(referenced to pin 1)
Service Guide E8364-90026
E8362B, E8363B, E8364B
and
Table 4-3 on
0 V (ground)
+2.54 V
@ 38 kHz
ac neutral