328 Chapter 11
Assembly Replacement Procedures
RF Section E4440A, E4443A, E4445A
A36 Preamplifier and SW6
To remove either the A36 Preamplifier or SW6 switch, it will be
necessary to drop the front frame. To drop the front frame with Option
110 installed, follow these steps:
1. Refer to Figure 11-12. Remove cables W109 and W110.
2. Refer to Figure 11-13. Remove ribbon cable W114 and wire harness
W106 from the Option driver board.
3. Drop the front frame. See page 314 for instructions.
Figure 11-14 Option 110 A36 Preamplifier and Switch SW6
Option 110 SW6 Switch
Removal and Replacement
1. Refer to Figure 11-14. To remove SW6, remove cables W112 and W113.
2. Remove the two screws (2).
3. To replace SW6, install it onto the bracket and secure it with the two screws
(2) removed earlier. Torque to 9 inch-pounds.
4. Replace W112 and W113. Torque to 10 inch-pounds.
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