Kowa VX-10a, Instruction Manual, Page: 48 / 64

7. Maintenance and inspection
Maintenance and inspection
7
P7-2
7-3 Inspecting/cleaning the objective lens
If objective lens should be fouled with fingerprints and the like, white spots will appear on identical locations of any
picture taken. Clean the lens following the steps below:
1) Turn ON the power switch.
2) Darken the room so that dirt on the objective lens can be discerned. Then set to “mydriatic color mode” and
maximize observation lamp intensity.
3) Blow off dirt and dust from the objective lens by the accessory blower.
4) If the dust blower is inefficient, wipe the surface with lens cleaning paper or gauze moistened with a mixture of
pure alcohol and ether ( in a 1 to 1 ratio). Be sure to wipe carefully and mildly without applying force. Rotate
the wipe little by little in a circular motion from in the center of the lens toward the edge.
5) Dirt, which cannot be cleaned off with the mixture, will be removed by lightly wiping the lens with cotton swab
moistened with a small amount of water.
After this step, fully wipe the lens with the solution all over again.
If dirt should still resist cleaning, contact your Kowa dealer where you purchased the instrument.
3) Blow off by the accessory blower 4) Wipe the surface of the lens
n
For cleaning all over again, discard the used lens cleaning paper (or gauze) and use the fresh one
moistened with the mixture, for complete cleaning.
• If it should be wiped with dust staying still on it or with force being applied on it, the lens may get scars on its
surface.
• Never use chamois skin or silicone-treated cloth.
• Because the suggested cleaning solution is highly volatile and flammable, special attention must be paid to
when handling and storing.
7-4 Disinfect
Wipe the forehead rest, head fixation band and the grip(option) with rubbing alcohol as soon as a patient completes
the examination. Also wipe the chin rest with rubbing alcohol when no chin rest paper is used.