In this appendix:Introduction...............................................................................A-1Line fuse replacement ..............................................................A-1Lithium battery ..........................................................................A-2Front-panel display ...................................................................A-2Upgrading the firmware ............................................................A-3IntroductionThe information in this section describes routine maintenance of the instrument that can be performedby the operator.Line fuse replacementA fuse located on the Model 2461 rear panel protects the power line input of the instrument.Disconnect the line cord at the rear panel and remove all test leads connected to theinstrument before replacing the line fuse. Failure to do so could expose the operator tohazardous voltages that could result in personal injury or death.Use only the correct fuse type. Failure to do so could result in injury, death, or instrumentdamage.Use a 5 x 20 mm slow-blow fuse rated at 250 V at 4 A.To replace the fuse, you will need a small flat-bladed screwdriver.Perform the following steps to replace the line fuse:1. Power off the instrument.2. Remove all test leads connected to the instrument.3. Remove the line cord.4. Locate the fuse drawer, which is above the AC receptacle, as shown in the figure below.Figure 182: Model 2461 line fuseAppendix AMaintenance
