Agilent Technologies N5242A - Removing and Replacing the A1-A3 and Other Front Panel Subassemblies

7-10 Service Guide N5242-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A1–A3 and Other Front Panel Subassemblies N5242A
Removing and Replacing the A1–A3 and Other Front Panel
Subassemblies
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 5/16 inch open-end torque wrench (set to 10 in-lb)
• ESD grounding wrist strap
Refer to Figure 7-3, Figure 7-4, and Figure 7-5 for the following procedures.
Pre-removal Procedure
1. Disconnect the power cord.
2. Remove the front panel assembly. Refer to “Removing and Replacing the Front Panel
Assembly” on page 7-8.
Removing the A2 USB Board
1. Remove the four retaining screws (item
①
) from the USB board and unplug it from the
A1 front panel interface board.
Removing the A1 Front Panel Interface Board and Keypad Assembly
1. Remove the A2 USB board as outlined above.
2. Remove the round knob (RPG) from the front panel by gently pulling the knob forward.
3. Disconnect the following cables from the A1 front panel interface board: display cable
(item
②
), inverter board cable (item
③
), USB controller board cable (item
④
), and
power switch cable (item
⑤
).
4. Remove the nine screws (item
⑥
) from the A1 front panel interface board and remove it
from the front panel assembly.
5. The keypad assembly can now be removed from the A1 front panel interface board by
gently pulling each of the rubber tabs through the PC board.
Removing the Inverter Board
1. Disconnect the inverter board cable (item
③
) and the LCD cable (item
⑦
) from the
inverter board.
2. Remove two screws (item
⑧
) and remove the inverter board.