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TROUBLESHOOTING
PROBLEM
Light fails to operate
Light burns out too soon
Light bulb burns out
immediately
Light flickers
PROBLEM
No image.
Poor resolution.
(Image not sharp)
Spots in field of view.
Uneven illumination of
field.
PROBLEM
Does not stay in focus.
ELECTRICAL
REASON FOR PROBLEM
Outlet inoperative.
AC power cord not connected.
Lamp burned out.
Fuse burned out.
Fuse burns out too soon.
Fuse blows instantly when replaced.
Incorrect lamp used improper voltage
or base.
The voltage is too high.
Incorrect lamp used.
Lamp not properly inserted into socket.
Lamp about to burn out.
Fuse holder not locked into proper
position.
Loose connection at AC outlet.
IMAGE QUALITY
REASON FOR PROBLEM
Nosepiece not indexed properly.
Light too bright
Objective lens dirty.
Eyepiece lens dirty.
Slide upside down.
Cover slip on specimen slides too
thick.
Too much light.
Condenser lens dirty.
Rack stop not set a proper position.
Eyepiece dirty.
Specimen slide dirty.
Condenser lens dirty.
Nosepiece not properly indexed.
Diaphragm not properly indexed.
MECHANICAL PROBLEM
REASON FOR PROBLEM
Stage drops down
Have qualified service technician repair outlet
Plug into outlet.
Replace lamp.
Replace fuse.
Replace with proper fuse (Time delay).
Unit has short, have qualified technician repair
electrical short.
Replace with specified lamp.
Adjust intensity control to the minimum
position before turning the power switch on.
Use proper lamp (12 volt 20 watt).
Plug unit into proper outlet 120v or 220v
Properly insert lamp.
Replace lamp.
Properly install fuse holder.
Have qualified service technician repair outlet.
Move revolving nosepiece until objective lens
clicks into position.
Adjust light intensity control to a lower
position.
Clean objective lens.
Clean eyepiece lens.
Turn specimen slide over (cover slip facing
up).
Use 0.17mm thick cover slip.
Adjust light intensity control to a lower
position.
Iris diaphragm not properly adjusted.
Clean condenser lens.
Adjust rack stop.
Clean eyepiece lenses.
Clean slide.
Clean lens of condenser.
Revolve nosepiece into positive index stop.
Adjust iris diaphragm to proper level.
Adjust tension adjustment knob.
10
SOLUTION
SOLUTION
SOLUTION
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