Removing And Replacing The A1-A3 And Other Front Panel Subassemblies - Keysight Technologies N5221A 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
Pre-removal Procedure
1. Disconnect the power cord.
2. Remove the front panel assembly. Refer to
Removing the A2 USB Board
1. Remove the four retaining screws (item
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
3. Disconnect the following cables from the A1 front panel interface board:
4. Remove the nine screws (item
5. The keypad assembly can now be removed from the A1 front panel
Removing the Inverter Board
1. Disconnect the inverter board cable (item
2. Remove two screws (item
Removing the Touchscreen Controller Board
7-10
Figure 7-3, Figure
Front Panel Assembly" on page
unplug it from the A1 front panel interface board.
knob forward.
➁
display cable (item
controller board cable (item
and remove it from the front panel assembly.
interface board by gently pulling each of the rubber tabs through the PC
board.
from the inverter board.
7-4, and Figure 7-5
"Removing and Replacing the
7-8.
①
) from the USB board and
), inverter board cable (item
④
), and power switch cable (item
⑥
) from the A1 front panel interface board
③
⑧
) and remove the inverter board.
Keysight N5221A/22A Service Guide
for the following procedures.
③
), touchscreen
⑤
).
) and the LCD cable (item
⑦
)