192 Chapter3
Assembly Replacement
Procedure 8. A7 through A13 Assemblies
4. Remove the gate bias wire, color code 97, and W12 from the A7
assembly.
5. Remove the assembly and disconnect W34.
Replacement
1. Use a 5/16-inch wrench to attach W34 to A7J4 and W42 (W43 on
Option 002) to A7J3.
2. Connect gate bias wire, color code 97, to the A7 gate bias connection
next to A7J2.
3. Connect cable W12 to the A7 assembly.
4. Place gate bias wire, color code 97, beneath W38 and connect W38 to
A7J1. Connect W42 (W43 on Option 002) to the front panel 1ST LO
OUTPUT connector. Connect W39 to A7J2.
5. Use two panhead screws to secure A7 to the center deck. Be sure to
attach the ground lug on the screw next to A7J4.
6. Torque all SMA RF cable connectors to 113 Ncm (10 in-lb).
A8 Low Band Mixer
Removal
1. Use a 5/16-inch wrench to remove W45 from FL1 and A8J1.
2. Loosen the semi-rigid coax cable connections at A8J2 and A8J3.
3. Remove the two screws securing A8 to the center deck.
4. Remove all semi-rigid coax cables from the A8 assembly.
Replacement
1. Place A8 on the center deck and attach all semi-rigid cables, starting
with A8J3. Use caution to avoid damaging any of the cables' center
conductor pins.
2. Use two panhead screws to secure A8 to the center deck. Reconnect
W45 to FL1 and A8.
3. Torque all semi-rigid coax connections on A8 to 113 Ncm (10 in-lb).
Ensure that all cable connections are tight.
A9 Input Attenuator
Removal
1. Place the spectrum analyzer upside-down on the workbench.
2. Remove W41 and disconnect W44 from the attenuator.
To Next Page
Loading...
Need help?
General
