Section 8: Troubleshooting guide Series 2280 Precision Measurement DC Power Supplies Reference Manual8-2 077085501 / February 2015What to do if the power supply does not turn onTo solve problems you might encounter when turning on the instrument, follow these steps:1. Verify that there is AC power to the power supply.First, check that the AC power cord is firmly plugged into the power connector on the rear panelof the power supply. You should also make sure that the AC power source you plugged thepower supply into is energized. Then, check that the power supply is turned on.2. Verify the power-line voltage settings.Check that the line voltage selector switch on the rear panel is set to the proper value for yourcountry (100 V AC/120 V AC or 220 V AC/ 240 V AC). Change the voltage setting if it is notcorrect.Under certain circumstances, powering the instrument from a mains voltage for which it is notconfigured can cause the mains fuse to be damaged.3. Verify that the correct power-line fuse is installed.If the fuse is damaged, replace the fuse for your power supply.If you set the line selection to 100 V and 120 V, use a 5 A, time delay 250 V fuse.If you set the line selection to 220 V and 240 V, use a 2.5 A, time delay 250 V fuse.4. If you need more help, see Additional Series 2280 information (on page 9-1).LAN troubleshooting suggestionsIf you are unable to connect to the instrument's web interface, check the following items: Verify that the network cable is in the LAN port on the rear panel of the instrument, not one of theTSP-Link® ports (see the description in Rear-panel overview (on page 2-3)). Verify that the network cable is in the correct port on the computer. The LAN port of a laptop maybe disabled when the laptop is in a docking station. Verify that the configuration information for the correct ethernet card was used during the setupprocedure. Verify that the network card of the computer is enabled. Verify that the IP address of the instrument is compatible with the IP address on the computer. Verify that the subnet mask address of the instrument is the same as the subnet mask address ofthe computer. Restart your computer. Turn the instrument's power off, and then on. Wait at least 60 seconds for the networkconfiguration to be completed. Verify that the correct settings are assigned to the instrument:1. Press the MENU key.2. Under System, select Communication.3. Select the LAN interface.4. Verify the settings.If the above actions do not correct the problem, contact your system administrator.
