CARE, MAINTENANCE, TROUBLESHOOTING AND SERVICEAxio Examiner Equipment maintenance Carl ZeissM60-2-0003 e 05/2012 83• Shut down and secure the equipment whenever a damage is found. Have damage repaired byqualified specialist personnel.• Check that the maximum operating time is observed for halogen or mercury vapor short arc lamps.5.2.2 Replacing fusesMake certain to pull out the power plugbefore replacing any fuse.The fuse box is located at the rear side of thecorresponding power supply or examiner controlunit. It is combined with the appliance inlet, andcontains two fuses of the following types:T 5.0 A/H 5x20mm(Examiner control and 12 V DC 100 W externalpower supply unit)orT 2.0/H A (HBO 100 transformer).orT 4 A (mbq52ac-z 100 V, 127 V transformer)T 2.5 A (mbq52ac-z 220 - 240 V transformer)• Pull out the power plug.• Pull out the fuse holder (Figure 5-1/2) towardsthe front side, and take it completely out of thefuse box (Figure 5-1/1).• Pull defective fuses out of the fuse holder, andreplace them by new fuses. Make certain thatthe fuse has the proper fuse designation.• Insert the fuse holder into the fuse box again,and push it in up to the stop.• Plug in the power plug.Figure 5-1 Replacing fuses, e.g., at the 12 VDC 100 W external power supplyunitFigure 5-2 Replacing fuses at the examinercontrol