U-UCD8
18
Under certain conditions, performance of the unit may be adversely affected by factors other than defects.
If problems occur, please review the following list and take remedial action as needed. If you cannot solve
the problem after checking the entire list, please contact your local Olympus representative for assis-
tance.
33
TROUBLESHOOTING GUIDE
Problem Cause Remedy Page
a. Field iris diaphragm image does
not appear when 10X to 100X
objectives are in use.
Slide glass is too thick.
Use side glasses measuring 1.4 mm or less.
When using immersion type top lens, however,
thickness should be 1.2 mm or less.
Top lens is swung out. Swing top lens in.
b. Image glare and resolution is low
under brightfield observation.
Aperture iris diaphragm s stopped down ex-
cessively.
Open diaphragm to proper diameter.
Swing top lens into light path when 10X to
100X objectives are in use.
c. Ring slit does not align with
phase plate of objective.
Incorrect optical element is inserted in light
path.
Engage optical element that matches objec-
tive in use by rotating turret.
Incorrect objective is inserted in light path. Engage correct objective into light path.
d. Darkfield contrast performance is
inadequate.
Top lens is swung out. Swing in top lens.
Aperture iris diaphragm is stopped down. Open aperture iris diaphragm.
Incorrect optical element is inserted in light
path.
Engage darkfield ring in light path.
Incorrect objective is used. See “Optical Elements and Compatible Ob-
jectives”.
Darkfield ring is not centered correctly. Center darkfield ring correctly.
7
3
7
6
22/23
23
15
15
22/23
23
15
Top lens is swung out.
ax7353_inst.pmd 20.04.2005, 12:2718
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