Troubleshooting - scope LSU VL-7EX II User Manual

Handheld Microscope Users Guide

Troubleshooting

A. No picture appears on the TV or projector.
1) Check that all cords are plugged in, especially the power cord, and that the TV or
projector is on.
2) Check that the power switch on the base of the scope is set on AUTO.
3) Check that the light switch is set to position "A" and that light is coming out of the lens.
4) Check that the correct channel or input is selected in your display. Refer to the
Troubleshooting table in the New SOAR section of this guide for additional tips.
B. Image is too dark and/or details of the object aren't seen.
1) For any lens except the 1X, make sure the lens lights are on by putting the light switch in
the "A" position. If using the 30X lens, try changing the light setting to the "B" position.
2) If using the 1X lens or looking at a water sample with any lens, try adding the lamp or
changing the background on which the specimen is placed.
salt on a white background
C. Image appears fuzzy.
1) 1X lens – rotate the gray, grooved ring to adjust the focus.
2) 30X/50X lens – be sure you are touching the object and that the lens tip is flat against
the object. Then check that the lens tip is not depressed (twist the conical tip to the
tallest position). If that doesn't help, try using the stand and depressing the contact tip.
3) 100X/200X/400X lens – make sure you are touching the object with the clear dome–
holding it flat against the object–and rotate the gray, grooved ring to adjust the focus.
For other problems, contact your vendor, go to www.ScopeCurriculum.com, or consult the LSU
Scope-On-A-Rope Program: http://www.scopeonarope.lsu.edu.
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salt on a dark background