5
TROUBLESHOOTING
IMAGE QUALITY
MECHANICAL PROBLEM
Spots in field of view
Uneven illumination of field
Eyepiece dirty
Specimen slide dirty
Condenser lens dirty
Nosepiece not properly indexed
Diaphragm not properly indexed
Problem
Reason for Problem
Solution
Does not stay in focus
Stage drops down
Adjust tension adjustment knob
Problem
Reason for Problem
Solution
No Image
Poor Resolution (Image not sharp)
Nosepiece not indexed properly
Light too bright
Objective lens dirty
Eyepiece lens dirty
Slide upside down
Cover slip on specimen slide too
thick
Too much light
Condenser lens dirty
Rack stop not set at a proper
position
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.
Clean condenser lens
Adjust rack stop
Clean eyepiece lens
Clean slide
Clean lens of condenser
Revolve nosepiece into positive
index stop
Adjust diaphragm to proper level
