ISSUE

CAUSE

SOLUTION

No illumination

The cable isn't connected correctly with

the power socket

Connect the power cable correctly

The main power switch is on "O"

position

Place the switch on "I" position

The plug on the power box is loosen

Insert the plug firmly

The plug on the lamp cap is loosen

The bulb has burnt out

Change the bulb

The fuse has blown

Change the fuse

The bulb is not assembled properly

Assemble the bulb properly

The filter lever is in the middle position

or in the position of gray filter

Set the filter lever to the correct

position

The brightness adjustment knob is at

minimum

Set the brightness adjustment knob

Slit is too dark

Voltage selector is wrongly set

Set the voltage selector correctly

The coat of the reflecting mirror is

oxidized

Too much dust on the reflecting

surface

Change the reflecting mirror

Clean the surface with the brush

Fuse has blown

Voltage selector is wrongly set

Set the voltage selector properly

The fuse doesn't comply with the

specification

Replace it with a suitable fuse

Slit width closes automatically

The slit width control knob is too loose

Adjust the tightness of the control

knob

Fixation bulb is off

The output plug is loose

Insert the output plug firmly