Processor Upgrade Procedures - Keysight N9912A Service Manual

Repair and Replacement Procedures

Processor Upgrade Procedures

Processor Upgrade Procedures
N9910HU-500 Processor Upgrade Procedures
1. Separate the front and rear cases. See
2. Remove all measurement group assemblies as one unit. Refer to
3. Remove the I/O side panel. Refer to
4. Remove the A6 SOM board and flexible RF cables. Refer to
5. Disconnect cable W3 from the A5 system board.
6. Remove four screws (item 4) from the system board shield and remove the
7. Remove six screws (item 5) from the A5 system board, lift it up from the RF
8. Remove the waffle gasket from the RF bottom shield and discard it. A new
9. Manipulate the new waffle gasket by hand to eliminate curling and install
10.Plug in the new A5 system board to the A4 RF board, over the new gasket,
11.Position a new waffle gasket, from the
12.Reinstall the system board top shield over the gasket and aligned with the
13.Hand-tighten four new screws (item 4) to secure the system board top
14.Torque these ten screws in the sequence shown by the circled numbers
7-46
Cases" on page 7-9.
"Removing All Measurement Group Assemblies as One Unit" on
page 7-29.
and Gasket" on page 7-14.
A6 SOM Board and Flexible RF Cables" on page
Enlarged Side View in illustration. Note which cable is connected to which
pc board connector to aid in reinstallation.
shield. Discard the screws, new ones are provided in the
Re-assembly Kit.
bottom shield, and unplug it from the A4 RF board connector. Discard the
screws, new ones are provided in the
gasket is provided in the
it on the RF bottom shield using the three dowel pins for alignment. It is
not necessary that the gasket be completely flat, just enough to remain in
position while installing the new A5 system board.
and aligned with the three dowel pins in the RF bottom shield.
system board top shield, on the A5 system board using the two dowel pins
for alignment. Manipulate this gasket by hand to flatten it if necessary.
dowel pins.
shield and six new screws (item 5) to secure the A5 system board to the RF
bottom shield.
➊➐➓
( ). Repeat this torque sequence one additional time.
"Separating the Front and Rear
"Replacing the I/O Side Panel, Doors,
Repair and Re-assembly
Repair and Re-assembly
Repair and Re-assembly
Keysight N9912A Service Guide
"Replacing the
7-33. Refer also to
Repair and
Kit.
Kit.
Kit, for the