A1 Mother Board Replacement; Tools Required; Removal Procedure; Replacement Procedure - Keysight E4980A Service Manual

Precision lcr meter
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Replacement Procedure

A1 Mother Board Replacement

A1 Mother Board Replacement

Tools Required

Removal Procedure

Refer to
Step 1. Remove the 3/4 rack module top as described in
Replacement" on page
Step 2. Remove the PPMC PCA as described in
page
Step 3. Disconnect the Mother-Analog cable (item 1) from A1 Mother Board.
Step 4. Disconnect the front USB cable (item 2) from A1 Mother Board.
Step 5. Disconnect the cable power control (item 3) from A1 Mother Board.
Step 6. Disconnect the power supply cables (item 4) from A1 Mother Board.
Pull out the power supply cables straight without touching the hook on the
cable connector.
Step 7. Disconnect the LCD cable (item 5) from Front Panel Assembly.
Step 8. Disconnect the fan cable (item 6) from FAN Assembly.
Step 9. Remove the 5/8 inch nut and washer (item 7) fastening the BNC connector.
Step 10. Remove the five TORX T10 screws (item 8) from the A1 Mother Board.
Step 11. Remove the A1 Mother Board toward front side.
Replacement Procedure
Step 1. Reverse the order of the removal procedure.
When you fasten the BNC connector with the 5/8 inch nut and washer, set
box torque wrench's torque to 17.4 in-lb.
When you fasten the A1 Mother Board with the five TORX T10 screws, set
screwdriver's torque to 8.7 in-lb for left-under screw of item 8 in the Figure
6-8, and set screwdriver's torque to 4.35 in-lb for other screws.
When you connect the LCD Cable to the A1 Mother Board, make sure the
LCD Cable is at the bottom of the Analog Source Cable.
86
Torque screwdriver, TORX T20
Torque screwdriver, TORX T8
Torque screwdriver, TORX T10
Box torque wrench, 5/8 inch
Figure 6-8
for this procedure.
73.
84.
"3/4 Rack Module Top
"PPMC PCA Replacement" on
Keysight E4980A/E4980AL Precision LCR Meter

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