100 Keysight E4980A/E4980AL Precision LCR Meter
Replacement Procedure
Power Inlet Assembly Replacement
6-
Power Inlet Assembly Replacement
Tools Required
• Torque screwdriver, TORX T20
• Torque screwdriver, TORX T8
• Torque screwdriver, TORX T10
• Box torque wrench, 5/8 inch
Removal Procedure
Refer to Figure 6-14 for this procedure.
Step 1. Remove the 3/4 Rack Module Top as described in “3/4 Rack Module Top
Replacement” on page 73.
Step 2. Remove the PPMC PCA as described in “PPMC PCA Replacement” on
page 84.
Step 3. Remove the A1 Mother Board as described in “A1 Mother Board
Replacement” on page 86.
Step 4. Disconnect the power cable connector (item 1) from the Power Supply
Assembly.
Step 5. Remove the TORX T20 screw (item 2) fastening the ground cable.
Step 6. Remove the two TORX T10 screws (item 3) fastening the Inlet Assembly.
Step 7. Remove the Inlet Assembly (item 4) from the Rear Panel.
Step 8. Detach the fuse box (item 5) from the original Inlet Assembly and remove the
fuse (item 6).
Replacement Procedure
Step 1. Reverse the order of the removal procedure.
When you fasten the ground cable with the TORX T20 screw, set
screwdriver's torque to 21.1 in-lb.
When you fasten the Inlet Assembly with the two TORX T10 screws, set
screwdriver's torque to 8.7 in-lb.
Do not forget to insert the fuse in the new Inlet Assembly.
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