Power Switch

The power switch turns the microscope lamp off and on.

Troubleshooting -- No Light
1.	Is the cord plugged in & is the outlet 'live'?
2.	Is switch in the 'on' position?
3.	Is the dimmer switch turned up high enough?
4.	Is the bulb burnt out?
5.	Does the fuse need to be replaced?
6.	If all of the above have been checked, then the microscope may have a wiring problem and will need to be referred to a qualified service technician. Do not attempt to repair a microscope yourself.

A typical fuse (left) and halogen bulb (right). Not all microscopes take halogen bulbs and there are variations in bulbs. Always refer to an instruction manual when replacing the bulb.

Typical halogen bulb. Halogen bulbs are extremely hot when they are on. Any oil on their surface will cause them to burn even hotter and burn out faster. For this reason, NEVER handle a halogen bulb with your bare fingers. Always use a piece of lens tissue to remove them from their package and install them in the microscope.

Always unplug the microscope BEFORE attempting to replace a fuse! Even with the power switch off, the fuse may have current running to it.

Fuse insertion site on the back of a microscope. Check the instruction manual to locate the fuse on your microscope. Never use the wrong fuse. A fuse rated for too few amps will burn out quickly and a fuse rated for too high an amperage will not burn out in time to protect the wiring inside the microscope in case of a power surge or other problem.. Check the manual to find out which fuse to use or take a sample fuse to an electronics store to make a match. Never rely on memory.

A typical fuse. See instructions at left for replacing blown fuses.