7
TROUBLESHOOTING PROCEDURES
PROBLEM
REASON FOR PROBLEM
SOLUTION
No Illumination
(All Models)
Disc diaphragm has not “clicked” into
proper position and is blocking light
source beneath stage
Turn disc diaphragm until it “clicks” into
position
(Non illuminated models)
Mirror not properly positioned to
direct light through microscope
Reposition mirror
(115 Volt Electric Models)
Outlet inoperative
AC power cord not connected
Lamp burned out
Have qualified service technician repair
outlet
Plug into outlet
Replace lamp
(Rechargeable LED Models)
Batteries fully discharged
Batteries will not hold a charge
On/Off rheostat control not turned far
enough
LED bulb burned out
Recharge batteries
Replace batteries
Turn rheostat to On position and rotate to
increase light intensity
Have qualified technical service company
change bulb
Image does not remain in focus
Eyepiece tube drops under its own
weight.
Adjust tension of coarse focus knob (see
maintenance)
Image does not focus
Cover slip on specimen slide too
thick.
Use 0.17mm thick cover slip.
(No. 1 cover slip)
Slide upside down.
Place slide on stage with cover slip facing
up.
Poor resolution
(image not sharp)
Objective lenses dirty.
Clean objective lenses.
Eyepiece lens dirty.
Clean eyepiece lenses.
Too much light.
Adjust disc diaphragm
Spots in field of view.
Eyepiece lens dirty.
Clean eyepiece lenses.
Specimen slide dirty.
Clean slide.
