Chapter 11 329
Assembly Replacement Procedures
RF Section E4440A, E4443A, E4445A
Option 110 A36 Preamplifier
Removal and Replacement
1. Refer to Figure 11-14. To remove A36, remove cables W112 and W113.
2. Remove the bracket from the front panel by removing the four screws (1)
and lifting the assembly from the front frame.
3. Remove all the wires from the preamplifier. The A36 Preamplifier can now
be removed from the bracket by removing the four screws from the back of
the bracket that attach the preamplifier.
4. To replace the preamplifier, install it on the bracket and attach it using the
four screws removed earlier. Torque to 3 inch-pounds.
5. Refer to Figure 11-15. Reattach the wires and ground wire to the
preamplifier.
Figure 11-15 Preamplifier Wires
6. Replace W112 and W113. Torque to 10 inch-pounds.
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