Removing And Replacing The A1-A3 And Other Front Panel Subassemblies - Keysight N5227A 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-8 TORX driver (torque to 6 in-lb or 0.68 N.m)
• 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
Refer to Figure 6-3., "Front Panel Assembly, Back Side, All
Pre-Removal Procedure
1. Disconnect the power cord.
2. Remove the front panel assembly. Refer to
7-7.
Removing the A1 Front Panel Interface Board and Keypad Assembly
1. Remove the round knob (RPG) from the front panel by gently pulling the knob forward.
2. Remove the four retaining screws (item
interface board.
3. Disconnect the following cables from the A1 front panel interface board: display cable (item
⑥
board cable (item ), touchscreen controller board cable (item
4. Remove the screws (item
5. Remove the screws (item
assembly.
6. 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
2. Remove two screws (item
7-8
"Removing and Replacing the Front Panel Assembly" on page
⑤
) from the USB board and unplug it from the A1 front panel
⑤
) from the A3 display assembly and remove it from the front panel assembly.
➁
) from the A1 front panel interface board and remove it from the front panel
⑥
) and the LCD cable (item
⑦
) and remove the inverter board.
PNA Series Microwave Network Analyzers
Options,", for the following procedures.
), and power switch cable (item
14
) from the inverter board.
19
Service Guide N5227-90001
N5227A
), inverter
23
).
15