Procedure 2; Self-Test Indicators - Agilent Technologies 8511B Operating And Service Manual

Test Set Troubleshooting
Troubleshooting Procedures
Replacement of the Line Module Fuse
1. Pry open line module cover door.
2. Pull out fuse carrier.
3. Insert fuse of proper rating.
4. Place carrier back into line module.
Selection of Operating Voltage
1. Pry open line module cover door.
2. Remove the CAM from the line module.
3. Rotate the cam to the desired voltage. (When the line module cover is
closed, the selected voltage will be visible through a small window.)
4. Insert the cam back into the line module.
5. Close the line module cover door.

Procedure 2

Self-Test Indicators

If the ACTIVE LED on the front panel of the instrument fails to light within
five seconds of power on or lights immediately, the instrument has not
passed its self-test. To determine what part of the self-test has failed, note
which LEDs on the A4 board are lit, see Figure 6-5.
Agilent 8511B Test Set Operating and Service Manual 6-7