Olympus PT PT-017, Инструкция по эксплуатации

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E-26
6. Maintaining the Waterproof Function
Remove the O-ring.
Open the Case and remove the O-ring from the Case.
Removal of the O-ring
①Insert the O-ring removal pick between the O-ring and the wall of the O-
ring groove.
②Move the tip of the inserted pick under the O-ring. (Take care not to
damage the O-ring groove with the tip of the pick.)
③Hold the O-ring with your fingertips after it has come out of the groove and
remove it from the Case.
Remove any sand, dirt, etc.
After visually checking that dirt has been removed from the O-ring, checking
for attached sand and other foreign matter, as well as for damage and cracks
can be done by squeezing the entire circumference of the O-ring lightly with
your fingertips.