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Chapter 3 Preparation and inspection before observation
3.4 Inspecting the insertion tube
WARNING
• Always turn off the illumination with the [LIGHT] button before inspecting the insertion tube.
The light may enter directly into your eye and cause an injury.
CAUTION
• Be sure to hold the insertion tube by a position on the rear of the angulation section.
Otherwise, the angulation section may be damaged.
Inspecting the external appearance of the insertion tube
1 Check visually that the outside of the complete length of the
insertion tube is free of irregularities such as deformation.
2 Check that the external covering material of the insertion tube,
other than the angulation section, is not loose.
CAUTION
• If the insertion tube is deformed, you may not be able to withdraw it from the observation
object.
• If the external material of the insertion tube is cut, take care against injury during inspection.
Inspecting the insertion tube's distal end
WARNING
• The distal end of the insertion tube may become hot due to the illumination light or the
internal heating caused by electrical parts. Do not forget to turn off the light source before
attaching or detaching the optical adapter. Touching the distal end immediately after having
turned off light source may burn your skin.
1 Make sure that power is turned off.
2 Remove the tip cap from the insertion tube's distal end. Make sure
that the O-ring on the insertion tube's distal end did not detach
after removing the tip cap (see "Inspecting the O-ring" (page 30)).
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