124Maintenance7.3 Fuse replacementDANGERCertain electrical circuits within this equipment are protectedby fuses against over-current conditions. For continuedprotection against a risk of fire, replace fuses only with thesame type and rating specified.DANGERFailed fuses are generally an indication of a problem with theequipment. If fuse failure continues, contact a servicerepresentative for instructions on how to return the equipmentfor repair. Do not attempt to repair the equipment yourself.1. Switch the instrument off.2. Unplug the power cord to remove all power from theinstrument.Figure 8 Lamp compartment1 Tungsten lamp 5 Plug contacts for fan2 Spring 6 Plug contact for deuterium lamp3 Screws 7 Plug contact for tungsten lamp (with grip and cable)4 Deuterium lamp (lamp socket)