Removing And Replacing The A1-A3 And Other Front Panel Subassemblies - Agilent Technologies N5242A Service Manual

Repair and Replacement Procedures
Removing and Replacing the A1–A3 and Other Front Panel Subassemblies
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
Pre-removal Procedure
1. Disconnect the power cord.
2. Remove the front panel assembly. Refer to
Assembly" on page
Removing the A2 USB Board
1. Remove the four retaining screws (item
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
②
(item ), inverter board cable (item
power switch cable (item
4. Remove the nine screws (item
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
inverter board.
2. Remove two screws (item
7-10
7-4, and Figure 7-5
7-8.
③
), USB controller board cable (item
⑤
).
⑥
) from the A1 front panel interface board and remove it
⑧
) and remove the inverter board.
PNA Series Microwave Network Analyzers
for the following procedures.
"Removing and Replacing the Front Panel
①
) from the USB board and unplug it from the
③
) and the LCD cable (item
N5241A/42A
④
), and
⑦
) from the
Service Guide N5242-90001