CARE, FUSE REPLACEMENT AND SERVICEZEISS Instrument maintenance Axioscope 5/7/Vario126 430035-7344-001 03/20185.2 Instrument maintenance5.2.1 Checking the instrument• Be sure to comply with the required voltage (e.g. on the power supply unit for HBO 100).• Check the power cable and the power plug for damage.• As soon as you become aware of any damage, turn off the instrument and secure. Call in a qualifiedprofessional to fix the problem.• Check to make sure that the maximum operational hours of the mercury vapor short arc lamp are notexceeded.5.2.2 Replacing the fuses in the standCAUTIONAlways disconnect the instrument fromthe power supply before changing anyfuses.If fuses blow, the cause must be identified and anytechnical defect must be properly eliminated.The fuse compartment is on the back of themicroscope. It is combined with the plug andcontains two fuses type T 3.15 A/H /250 V.• Disconnect the plug.• Pull the fuse retainer (726HFig. 5-1/2) out to thefront with the aid of a small screwdriver, ifnecessary.• Remove the fuses from their container andreplace them with new fuses.• Push the fuse retainer back into thecompartment (727HFig. 5-1/1) to the stop.• Reconnect the instrument to the power supply.Fig. 5-1 Replacing the fuses in the stand
