Revolving nosepiece not in click stop
position
Revolve to click-stop position
Image tinged yellow
Blue filter not used
Use blue filter
Insufficient illumination brightness Condenser aperture too small
Readjust aperture
Condenser position too low
Correct position
Dirt or dust on the lens (condenser,
objective, eyepiece, collector)
Cleaning
2. Mechanical
Trouble
Cause
Remedy
Image not focusable with high
power objective
Slide upside-down
Turn slide cover
Cover glass too thick
Use cover glass of specified thickness
(0.17mm)
High power objective contacts slide
when changed-over from low
power
Side upside down
Turn slide over
Cover glass to thick
Use cover glass of specified thickness
(0.17mm)
Specimen movement unsmooth
Mechanical stage not securely
fastened
Tighten all fastener
Binocular images not integrated
Interpupillary distance not correctly
adjusted
Adjustment
Excessive eye fatigue
Incorrect diopter adjustment
Correct adjustment
Inadequate brightness or illumination Adjust brightness with control dial
3. Electrical
Trouble
Cause
Remedy
Lamp dose not light when switched
ON
No electrical power
Check power cord connection
Lamp bulb not inserted
Insert correctly
Lamp failure
Replacement
Sudden lamp failure
Unspecified lamp bulb used or input
voltage too high
Replace with specified lamp bulb. If
the same symptom occurs after
replacing the lamp, contact your
dealer
Insufficient illumination brightness Unspecified lamp bulb used
Replace with specified lamp bulb
Voltage too low
Increase brightness with control dial
Flickering
or
unstable
lamp
brightness
Lamp bulb about to fail
Replacement
Lamp bulb not correctly inserted into
socket
Check for positive connection
7. Maintenance
1. Cleaning Lenses
Dust is best removed with a soft brush or gauze.
More persistent dirt, such as fingerprints, grease and oil, may be removed with soft cotton, lens tissue, or
gauze lightly moistened with absolute alcohol (ethyl or methyl alcohol).
To clean immersion oil off the oil-immersion type objective, use lens tissue, soft cotton or gauze lighty
moistened with petroleum benzine only.
