Agilent Technologies FieldFox N9923AN Service Manual page 100

Repair and Replacement Procedures
Removing and Replacing the Front Panel Group Assemblies
Replacing the A3 Front Panel Interface Board (FPIB)
The A3 front panel interface board contains a Lithium-ion battery. Refer to
IMPORTANT
"Battery Disposal" on page 1-7
printed circuit board with the battery attached. If necessary, the battery can
be removed from the printed circuit board and disposed of separately.
1. Perform the steps under
2. Remove the four screws (item 2) that secure the LCD shield and remove the LCD
shield. Discard the four screws, new ones are provided in the
Kit. Be careful. The A2 LCD display is now loose and will fall out of the front
case if the case is tipped.
3. Disconnect the RPG cable, W12, at the A3 FPIB connector as indicated.
4. Disconnect the A2 LCD to FPIB cable, W113, at the A3 FPIB connector as indicated.
5. Remove the nine screws (item 3) that secure the A3 FPIB to the front case.
6. Push the nine rubber "nubs" through the A3 FPIB to release the A1 keypad. The
A1 keypad is permanently attached to the front case and must remain.
7. Position the new A3 FPIB in the front case over the A1 keypad and, using needle-nose
pliers, pull the nine rubber "nubs" on the A1 keypad through the holes in the A3 FPIB.
Make sure that all nine of the rubber "nubs" are fully extended on the back side of the
A3 FPIB.
8. Secure the A3 FPIB to the front case with nine new screws (item 3) provided in the
Repair and Re-assembly
9. Re-connect the A2 LCD to FPIB cable, W13, to the A3 FPIB connector as indicated.
Route the cable as shown.
10. Re-connect the RPG cable, W12, to the A3 FPIB connector as indicated, with the
A2 LCD to A3 FPIB cable, W13, passing beneath it as shown. Bend the RPG cable
toward the right side as shown.
11. Place the LCD shield back in position on the A2 LCD. Make sure that the A2 LCD to
A3 FPIB cable, W13, is routed between, not under, the shield gaskets.
12. Secure the shield with four new screws (item 2) provided in the
Re-assembly Kit.
13. Perform the steps under
7-22
for important instructions on disposing of this
"Pre-replacement Procedure" on page
Kit.
"Post-replacement Procedure" on page
RF Vector Network Analyzer
N9923AN
7-18.
Repair and Re-assembly
Repair and
7-24.
Service Guide N9923-90005