7-22 Keysight N9912A Service Guide
Repair and Replacement Procedures
Removing and Replacing the Front Panel Group Assemblies
7-
e. To install a new RPG, reverse the above steps. A new cable, nut, and
washer are included with the new RPG. When reinstalling the RPG
cable, W12, bend the cable toward the right side on top of the
display to front panel interface board cable.
5. Reinstall the hole plugs in the front case. Apply one drop of isopropyl
alcohol on each hole plug to lubricate it, making it easier to install. Use
alcohol only in a well ventilated area. View the hole plugs from the front to
ensure that they are fully seated. These hole plugs must be installed to
maintain water-tight integrity.
6. Reinstall the RPG knob. Refer to step 3.b of this procedure.
7. Perform the steps under “Post-replacement Procedure” on page 7-28.
Figure 7-14 Replacing the RPG and RPG Knob
Replacing the A2 LCD, the LCD Shield, and LCD Cables
1. Perform the steps under “Pre-replacement Procedure” on page 7-21.
2. To replace the LCD shield:
a. Remove the four screws (item 1) that attach the LCD shield and
discard them. New screws are provided in the Repair and
Re-assembly Kit.
b. Lift the LCD shield off of the A2 LCD.
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