Agilent Technologies FieldFox N9923AN Service Manual page 98

Repair and Replacement Procedures
Removing and Replacing the Front Panel Group Assemblies
Replacing the A2 LCD, the LCD Shield, and LCD Cables
1. Perform the steps under
2. To replace the LCD shield:
a. Remove the four screws (item 1) that attach the LCD shield and discard them. New
screws are provided in the
b. Lift the LCD shield off of the A2 LCD.
c. Install new gap pads on the new LCD shield in the locations shown. Refer to
7-15 and Figure 7-8 on page 7-12
d. Place the new LCD shield in position on the A2 LCD and secure it with four new
screws (item 1). These screws are provided in the
3. To replace the LCD cables and the A2 LCD:
a. Remove the LCD shield. Refer to steps
b. Disconnect the A2 LCD to A3 FPIB cable, W13, at the A2 LCD. If replacing only this
cable:
1. Disconnect the cable at both ends.
2. Remove the cable from beneath the RPG cable, W12.
3. Route the new cable beneath the RPG cable as shown and re-connect both ends.
4. Bend the RPG cable toward the right side as shown.
5. Skip to step 3.h.
c. Note the location of the adhesive tape over the connector on the A2 LCD to
A5 system board cable, W11. Remove the tape and disconnect the cable. If replacing
only this cable:
1. Connect the new cable.
2. Skip to step 3.h.
d. Remove the A2 LCD from the front case.
e. Place the new A2 LCD in position and re-connect the cables.
f. Place a strip of adhesive tape over the LCD connector end of the A2 LCD to
A5 system board cable W11, in the same location as the old strip and as shown. A
new strip of adhesive tape is provided in the
g. Connect cable W13 to the A2 LCD.
h. Reinstall the LCD shield with four new screws provided in the
Re-assembly Kit. Refer to step
4. Perform the steps under
7-20
"Pre-replacement Procedure" on page
Repair and Re-assembly
for placement of gap pads.
2.a
Step d on page 7-20
"Post-replacement Procedure" on page
7-18.
Kit.
Repair and Re-assembly
and 2.b of this procedure.
Repair and Re-assembly
Repair and
of this procedure.
7-24.
Service Guide N9923-90005
RF Vector Network Analyzer
N9923AN
Figure
Kit.
Kit.