A31 Digital Board Assembly Replacement; Tools Required; Removal Procedure; Replacement Procedure - Keysight Technologies E4981A Service Manual

Replacement Procedure

A31 Digital Board Assembly Replacement

A31 Digital Board Assembly Replacement

Tools Required

• Torque screwdriver, TORX T8
• Torque screwdriver, TORX T10
• Torque screwdriver, TORX T20
• Box torque wrench, 5/8 inch

Removal Procedure

Refer to Figure 6-12
Step 1. Remove the 3/4 rack module top as described in
page 92.
Step 2. Remove the PSU Deck Assembly as described in
page 95.
Step 3. Remove the Interface Board Assembly as described in
Replacement" on page
Step 4. Remove the PPMC PCA as described in
Step 5. Remove a 5/8 inch nut (item 1) fastening the Rear Chassis Assembly.
Step 6. Disconnect the Fan cable from the A31 Digital Board Assembly (item 2).
Step 7. Remove the six TORX T10 screws (item 3) fastening the Rear Chassis Assembly.
Step 8. Remove the Digital Borad Assembly.
Replacement Procedure
Step 1. Reverse the order of the removal procedure.
108
and for this procedure.
105.
"PPMC PCA Replacement" on page
"3/4 Rack Module Top Replacement" on
"PSU Deck Assembly Removale" on
"Interface Board Assembly
107.
Chapter 6