15
OSE-42-BA-e-1810
8
Trouble shooting
Electrical system
Problem
Possible causes
The lighting unit cannot be switched
on
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 bulb has blown
The wrong bulb has been used
The input voltage was too high
The bulb flickers
The bulb is not correctly fitted
The lamp is worn out
The bulb brightness is not sufficient
The wrong bulb has been used
The input voltage is too low
Optical unit
Problem
Possible causes
You can see two images
The gap between the eyes is not set
correctly
The magnifications of the eyepieces do not
match
There is dirt in the visual field
There is dirt on the object being observed
There is dirt on the eyepiece surface
The image is unclear
There is dirt on the objective surface
The focus wheels are jammed
The torque of the focus wheels is set too
high
The microscope head slips down
while you are viewing the object
The torque of the focus wheels is set too low
Eyes get tired easily
The dioptre adjustment is not correct
The brightness adjustment is not correct
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Te
mp
era
tur
°C
Summary of Contents for OSE 421
Page 2: ......
Page 7: ...OSE 42 BA e 1810 6 2 Nomenclature...
Page 10: ...9 OSE 42 BA e 1810 Assembled stereo microscope...
