HP (Hewlett-Packard) HP 85660B ユーザーズマニュアル

Figure 2. 

 Coaxial Switch and 

 300 MHz BPF Replacement

For location of hardware and cables referred to in this procedure, see Figure 3.

1. Remove front panel from RF Section. (See A5 Front Panel Section for front panel removal

procedure.)

2. Remove top and bottom covers from RF Section.

3. Disconnect attenuator cables 

4. Remove two screws 

 used to attach attenuator bracket to motherboard.

5. Remove two screws   used to attach attenuator bracket to “totem pole” assembly.

6. Remove RF Module PC board cover by removing six screws   and five cables   (three

from 

 and two from 

7. Remove 

 leaving remaining cables attached.

8. Disconnect attenuator ribbon cable connector 

 from motherboard.

9. Attenuator (attached to bracket) is now free. Remove from RF Module.

10. Remove attenuator bracket from attenuator by removing two screws 

4 A6