IRB20 Inverted Microscope Bulb & Fuse Replacement
12
Fein
TROUBLE
POSSIBLE CAUSE
SOLUTION
Coarse focusing knob
is too tight.
Tension knob is too loose.
Tighten it a little.
Stage declines itself,
cannot stay on the
focal plane when
observing.
Tension knob is too loose.
Tighten it a little.
Coarse focusing knob
can’t rise.
The limit stop knob is locked.
Loosen the knob.
Coarse focusing knob
can’t decline.
The base of the condenser is too low.
Raise the base.
Cannot move the
slide smoothly.
The slide is not fixed correctly.
Adjust it
The movable specimen holder is not fixed
properly.
Adjust it
The image moves
obviously when
touching the stage.
The stage is fastened incorrectly.
Fasten the stage correctly.
The LED light does
not work.
No power supply.
Check the connection of the
power cable.
The LED bulb is not installed correctly.
Install it correctly.
The LED bulb is burnt out.
Replace it.
The bulb burns out
frequently.
The wrong bulb is being used.
Replace it with the correct bulb.
The illumination is
not bright enough.
The wrong bulb is being used.
Replace it with the correct bulb.
The illumination adjustment is not set in a
bright position.
Adjust the illumination knob to
intensify the light.
Troubleshooting
