Chapter 11 351
Assembly Replacement Procedures
RF Section E4446A, E4447A, E4448A
Figure 11-30 Preamplifier Wires
6. Replace the front frame.
SW4 Millimeter Switch
Removal
1. Drop the front frame. See page 314 for instructions.
2. Refer to Figure 11-28. Remove cables W101, W102, W103, W104, and
ribbon cable W91.
3. Remove the three screws (2) that attach the switch to the bracket.
Lift the switch from the bracket.
Replacement
1. Attach the switch to the bracket using the three screws (2) removed
earlier. Torque to 6 inch-pounds.
2. Replace cables W101, W102, W103, and W104. Torque to
9 inch-pounds.
3. Replace ribbon cable W91.
4. Replace the front frame.
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