Pentax EG-2990i Instructions For Use Manual page 20

c) Engage fully the angulation locks to be certain that the position of the angulated
tip can be stabilized.
Figure 2.9
WARNING:
Prior to use ensure that the angulation controls can rotate smoothly,
that there is no grinding or excess friction within the angulation system
and that the bending section bends freely and smoothly. NEVER APPLY
EXCESSIVE FORCE TO THE ANGULATION CONTROLS!
ANY lack of smooth operation of the angulation controls may be an
early indication of internal damage to and/or part(s) failure within
the endoscope's angulation system. To avoid the possibility of further
endoscope damage or the potential for malfunction of the angulation
system, do NOT use the endoscope if the angulation mechanism does not
operate properly. Use of endoscope with suspect angulation mechanism
could lead to angulated distal tip to not being able to be released and end
up damaging patient tissue/membrane or perforation.
CAUTION:
When an endoscope exhibits excessive "knob play" or if angulation is lost
in any direction, do NOT use the instrument.
Excessive "knob play" can be defined as rotating of the angulation control
knob(s) in any one direction for more than 30 degrees without any
corresponding distal tip angulation. The examples above are indications
that service is required to avoid more serious problems with the angulation
control system.
4) Inspection of Air/Water Feeding System
a) Prior to use, the air/water feeding valve (OF-B188) should be inspected. Remove
the air/water valve from the control body and ensure that O-rings in good
condition are properly attached.
Figure 2.10
(1)
(2)
(1)
(2)
(3)
(4)
– 15 –
(1) Right-Left
(2) Up-Down
(1) OF-B188
(2) Cap
(3) O-Ring
(4) Check Valve