Olympus PT-036 Mode D'emploi page 67

7. Maintaining the Waterproof Function
Whenever you open the rear lid of the Case, always be sure to perform
the O-ring maintenance operation as described below.
Remove the O-ring.
Open the Case and remove the O-ring from the Case.
Removal of the O-ring
1 Insert the O-ring remover between the O-ring and the O-ring groove.
2 Slip the tip of the inserted O-ring remover below the O-ring.
(Be careful not to scratch the O-ring groove with the tip of the O-ring
remover.)
3 Hold the O-ring with your fingertips after it has come out of the groove
and remove it from the Case.
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