Chapter 11 317
Assembly Replacement Procedures
RF Section E4440A, E4443A, E4445A
RF Section
E4440A, E4443A, E4445A
All of the individual components of the RF section can be removed with
the RF section in place in the instrument. If necessary for some service
situations, the RF section can be removed as a unit to make it easier to
replace an individual device.
In either case, you must first remove the instrument outer case and top
brace to gain access to the RF section. Refer to the “Instrument Outer
Case” and the “Top Brace” removal procedures.
CAUTION Use ESD precautions when performing this replacement procedure.
Complete RF Section
Removal
1. Refer to Figure 11-35 on page 358. Loosen, but don’t remove the
semi-rigid W9 cable at the attenuator.
2. Refer to Figure 11-6. Remove the cable hold-down (3) by removing
the one screw.
3. Remove the cables from the locations indicated (1).
4. Remove the ribbon cables from the A13 Front End Driver assembly.
5. Using the T-10 driver, remove the 4 screws (2).
6. The RF section can now be removed from the deck by sliding it up.
Take care to avoid catching any cables on the assembly as you
remove it.
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