Keysight N9912A Service Guide 7-23
Repair and Replacement Procedures
Removing and Replacing the Front Panel Group Assemblies
c. Install new gap pads on the new LCD shield in the locations shown.
Refer to Figure 7-15 and Figure 7-8 on page 7-14 for placement of
gap pads.
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
Repair and Re-assembly Kit.
3. To replace the LCD cables and the A2 LCD:
a. Remove the LCD shield. Refer to step 2.a and step 2.b of this
procedure.
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
Repair and Re-assembly Kit.
g. Connect cable W13 to the A2 LCD.
h. There are two identical connectors, CN3 and CN4, near the
connector for cable W13. A strip of adhesive tape should cover each
connector as shown in Figure 7-15. If not, apply tape strips by
cutting a strip of adhesive tape (provided) in half and applying one
half to each connector as shown in Figure 7-15. Press down firmly
on the tape to conform it to the contours of the connectors and to
ensure proper adhesion. The strip of adhesive tape is part of the
N9912-60027 Repair and Re-assembly Kit.
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