Sony MPK-TRV3, Руководство по эксплуатации

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The O-ring assures the waterproof function of the marine pack. To maintain waterproof
integrity, use it correctly. Incorrect handling may cause water to leak in.
Check that there are no scratches or cracks
Scratches or cracks on the O-ring may cause water to leak in. If the O-ring is damaged
in this way, replace it with a new one. Do not remove the O-ring from the groove with a
metal tool or a tool with a sharp point.
Remove any dust, sand or hair from the O-ring
Make sure there is no dust, sand or hair on the O-ring, in the groove, or on the surface
of the marine pack where the O-ring touches. If there is, clean them completely, or the
O-ring and the surface of the marine pack may be damaged and water may leak in.
Grease the O-ring
The grease protects the O-ring from wear.
Check that there are no cracks or dust on the O-ring, then grease it using your finger.
While greasing, double check that there are no cracks or dust.
Never use cloth or paper to apply grease because the fibers may cling.
Do not use any type of grease other then the supplied one, or it may damage the O-ring.
If you run out of silicone grease (2-115-921-01) you can purchase it from your nearest
Sony Service Center.
Note on the O-ring
Scratches
Crack
O-ring