7-56 Keysight N5227B Service Guide
Repair and Replacement Procedures
Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board
7-
Removing and Replacing the A70 or A75 Low Frequency Extension
(LFE) Board
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
— 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— ESD grounding wrist strap
Removal Procedure
for this procedure.
1.
Disconnect the power cord.
2.
Remove the outer cover. Refer to
“Removing the Covers” on page 7-6
3.
Position the analyzer bottom side up.
4.
Remove the A19 test set motherboard. Refer to
the A23 Test Set Motherboard” on page 7-30
– Four port PNAs use the A70 LFE board.
– Two port PNAs use the A75 LFE board.
The A70 LFE board RF flexible cable’s connector labels on port 3 and port 4
connectors on the A70 LFE board are similar to the A75 LFE board’s port 1
and port 2 connector labels.
