Keysight E4980A/E4980AL Precision LCR Meter 107
Replacement Procedure
Front Panel, Key Pad, and Key Flex Circuit Replacement
Front Panel, Key Pad, and Key Flex Circuit Replacement
Tools Required
• Torque screwdriver, TORX T10
• Torque screwdriver, TORX T20
• Box torque wrench, 7 mm
• Box torque wrench, 5/8 inch
Removal Procedure
Refer to Figure 6-18 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 PCA E4980 USB as described in “PCA E4980 USB Replacement”
on page 102.
Step 3. Remove the A3 Analog Daughter Board as described in “A3 Analog Daughter
Board Replacement” on page 77.
Step 4. Remove the A2 Analog Board as described in “A2 Analog Board Replacement”
on page 79.
Step 5. Remove the Front Panel Assembly as described in “Front Panel Assembly
Removal” on page 81.
Step 6. Disconnect the Display Cable (item 1) from the Key Flex Circuit.
Step 7. Carefully remove the Display Support with the LCD display (item 2) from the
Front Panel.
Step 8. Remove the Front Panel (item 3) from the Key Pad (item 4), the Window EMI
Shield (item 5), the Key Flex Circuit (item 6), and the EMI Shield (item 7).
Replacement Procedure
Step 1. Reverse the order of the removal procedure.
When removing the Display Support, release the hook (flat cable side) of
the Display Support first, and then carefully release the other hooks of the
Display Support.
Be careful not to break the hooks.
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