Trouble Shooting - KERN Optics OZL 46 Series User Instructions

8 Trouble shooting

Electrical system
Problem
The lighting unit (if fitted) cannot be
switched on
The bulb has blown
The bulb flickers
The bulb brightness is not sufficient
Optical unit
Problem
You can see two images
There is dirt in the visual field
The image is unclear
The focus wheels are jammed
The microscope head slips down
while you are viewing the object
Eyes get tired easily
17
Possible causes
The power cable is either not connected or
not connected correctly
The bulb is not fitted
The bulb has blown
The fuse has blown
The brightness control is set to the lowest
level
The wrong bulb has been used
The input voltage was too high
The bulb is not correctly fitted
The lamp is worn out
The wrong bulb has been used
The input voltage is too low
Possible causes
The gap between the eyes is not set
correctly
The magnifications of the eyepieces do not
match
There is dirt on the object being observed
There is dirt on the eyepiece surface
There is dirt on the objective surface
The torque of the focus wheels is set too
high
The torque of the focus wheels is set too low
The dioptre adjustment is not correct
The brightness adjustment is not correct
OZL-46-BA-e-1610