Agilent Technologies FieldFox MW N9913A, Service Manual

Page: 119 / 156

N9927-90003 7-25
FieldFox Analyzer Repair and Replacement Procedures
Removing and Replacing the Front Panel Group Assemblies
Replacing the A3 Front Panel Interface Board (FPIB)
IMPORTANT The A3 front panel interface board contains a Lithium-ion battery. Refer to “Battery
Disposal” on page 1-7 for important instructions on disposing of this 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 “Pre-replacement Procedure” on page 7-21 .
2. Refer to Figure 7-17 . 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 Repair and Re-assembly 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, W13, 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 Kit .
9. Re-connect theA2 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 Repair and Re-assembly Kit .
13. Perform the steps under “Post-replacement Procedure” on page 7-26 .