Agilent Technologies PSA Series Service Manual page 334

Assembly Replacement Procedures
RF Section E4440A, E4443A, E4445A
Bottom Switch Removal
1. Drop the front frame. See
2. Refer to
3. Remove cable W81 at port 2 of the bottom switch.
4. Refer to
Figure 11-20 Bottom Switch Cables
5. Refer to
6. Loosen the switch mounting screw located closest to the fan. Loosen
7. Loosen the other switch mounting screw just enough to rotate both
8. Make note of the black jumper wire position on the bottom switch
334
Figure 11-17. Remove cables W84, W86, and W87 from the
top switch. Note that two of the cables have identification bands that
correspond to the connector designator 1, or 2, printed on the switch.
Figure 11-20. Remove W80 from the attenuator and from
port C of the bottom switch and set the cable aside.
Figure 11-16
dual mixer and port 1 of the bottom switch. In order to completely
remove the cable, you will need to position the flat sides of the SMA
connector nut so it will fit between the two switches.
the screw just enough so the threads are clear of the mounting
bracket but do not remove the screw.
switches towards the front of the instrument. This allows room to
unsolder the black jumper wires on the bottom switch.
page 314 for instructions.
and Figure 11-20. Remove cable W82 from the
Chapter 11