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7 Maintenance and inspection
Objective lens
(Perform the following after in-
specting the observation illumina-
tion lamp.)
Turn the observation light intensity
control knob to maximum, and
visually verify the objective lens
from oblique angle.
Return the observation light inten-
sity control knob to the 10 o'clock
position after the conrmation.
No dust, debris, teardrop must be
found.
Internal circuit
(Perform the following after in-
specting the objective lens.)
Make the instrument ready for
photography according to the sys-
tem conguration.
Place a hand in front of the objec-
tive lens, and push the shutter but-
ton to verify that the ash light is
emitted and the image is saved.
Flash light is emitted.
The image is saved.
7.3 Daily cleaning
7.3.1 Cleaning the objective lens
Images may show white shadow spots at the same places if the objective lens is contaminated with n-
gerprints, etc. Clean the objective lens according to the procedure below.
1) Turn on the power.
2) Set the photography mode to “mydriatic color” after the instrument has started up.
3) Set the observation illumination light intensity to maximum.
4) Blow off debris or dust using the attached blower.
5) When it is not cleaned by the procedure 4), moisten soft cloth or cleaning paper with cleaning solution
made from ethyl alcohol and ether (1:1) and lightly wipe the lens starting from its center in a circular
motion. Repeat this step several times.
6) If any soil is left out after cleaning according to the step 5), gently wipe off the soiled area with a cot-
ton swab soaked with a little amount of water. If you have done this procedure, repeat the step 4).
7) Should you have any soil that cannot be removed by the steps above, contact Kowa or your Kowa
dealer.
;
Change the cleaning paper or the soft cloth to new one every time you wipe.
Important
◇ Cleaning the lens without removing dusts and debris when wiping may scratch the lens surface.
◇ Do not use chamois leather, silicon cloth etc.
◇ Carefully store and handle the ammable and combustible cleaning solution.