HP 8517B Fuse Location, Self-Test, Indicators, Figure 5-5Fuse and Voltage Cam Location, Figure 5-4Instrument HP-IBSwitch Setting

Troubleshooting the Test Set

Troubleshooting Procedures

Fuse Location

Figure 5-4 Instrument HP-IB Switch Setting

The fuse is located inside the line module at the rear panel of the test set. The value rating and part number of the fuse is listed in Chapter 7, “Replaceable Parts” of this manual. Review the information in Figure 5-5to replace the line fuse or to set the voltage selector cam.

Figure 5-5 Fuse and Voltage Cam Location

Self-Test Indicators If the front-panel ACTIVE LED (shown in Figure 5-6)fails to light within five seconds after turning the power on, or if it lights immediately, the instrument has failed self-test.

To determine the portion of the self-test that failed, note which LEDs on A4 board assembly are turned on. Figure 5-7shows the location of the LEDs. See Table 5-4for the condition description of the LED status indicators.

HP 8517B S-Parameter Test Set Manual 5-9