Removing And Replacing The Front Panel Group Assemblies - Keysight N9912A Service Manual

Repair and Replacement Procedures

Removing and Replacing the Front Panel Group Assemblies

Removing and Replacing the Front Panel Group Assemblies
Tools Required
— T-8 TORX driver (set to 6 in-lb)
— T-10 TORX driver (set to 9 in-lb)
— 7/16-inch hex nut wrench or "nut driver" (set to 9 in-lb)
—
— Soldering tool (Required only for RTC battery replacement.)
Before beginning any repair, disconnect the power cord.
Pre-replacement Procedure
1. Separate the front and rear cases. Refer to
2. Remove the measurement group assemblies (RF top panel, A4 RF board,
Replacing the RPG and RPG Knob
1. Perform the steps under
2. Remove the two hole plugs from the back side of the front case, next to
3. To replace the RPG knob:
4. To replace the RPG:
Keysight N9912A Service Guide
Repair and Re-assembly
Cases" on page 7-9.
A5 system board, and A6 SOM board) as one unit with the I/O panel
attached. Refer to "Removing and Replacing the Measurement Group
Assemblies" on page 7-29.
the RPG.
a. Insert a round shaft, such as a screwdriver shaft, into the exposed
holes and push the RPG knob off of the RPG shaft to the front side of
the front case.
b. Install a new knob by aligning the D-shaped detent in the knob with
the D-shape on the shaft and push the knob into position.
a. Remove the RPG knob. Refer to
b. Disconnect the RPG cable, W12, from the A3 front panel interface
board.
c. Using a 7/16-inch hex nut wrench, remove the hex nut from the RPG
shaft.
d. Pull the RPG out the back side of the front case and retrieve the lock
washer from the front side.
Kit. Refer to "Miscellaneous Parts" on page
"Separating the Front and Rear
"Pre-replacement Procedure" on page
step 3a of this procedure.
6-12.
7-21.
7-21