Keysight E4980A Service Guide

Keysight E4980A/E4980AL Precision LCR Meter 77
Replacement Procedure
A3 Analog Daughter Board Replacement
A3 Analog Daughter Board Replacement
Tools Required
• Torque screwdriver, TORX T10
• Torque screwdriver, TORX T20
Removal Procedure
Refer to Figure 6-4 and 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. Disconnect the front USB cable (item 1) from the front panel assembly.
Step 3. Disconnect the LCD cable (item 2) from the A1 Mother Board.
Step 4. Disconnect the power supply cable (item 3) from the A3 Analog Daughter
Board.
Step 5. Disconnect the two SMB cables (item 4) from the A3 Analog Daughter Board.
Step 6. Disconnect the Analog Source Cable (item 5) from the A3 Analog Daughter
Board.
Step 7. Remove the four TORX T10 screws (item 6) fastening the A3 Analog Daughter
Board.
Step 8. Remove the A3 Analog Daughter Board.
Replacement Procedure
Step 1. Reverse the order of the removal procedure.
Pull out the power supply cable straight without touching the hook on the
cable connector.
When you replace the A3 Analog Daughter Board, stick the Foot Bumper
(item 7) to the backside of the board as location of sub-figure in Figure 6-4.
When you fasten the A3 Analog Daughter Board with the four TORX T10
screws, set screwdriver's torque to 8.7 in-lb.
When you connect the LCD Cable to the A1 Mother Board, make sure the
LCD Cable lies beneath the Analog Source Cable.

Keysight E4980A Specifications

General

Frequency Range	20 Hz to 2 MHz
Basic Accuracy	0.05%
DC Bias Voltage	0 V to ±40 V
Measurement Functions	L, C, R, Z, D, Q
DC Bias Current	0 A to 20 mA (using external DC bias source)
Display	LCD
Interface	LAN, USB, GPIB
Dimensions	426 mm (W) x 177 mm (H)
Weight	13.5 kg