Sony Xpreia acro S Working Instructions page 54

Replacement: Water Indicator
Use an air gun to clean the Cap Micro SD and its hole!
Do not touch the sealing rubber of the Cap Micro SD!
Make sure that the Cap Micro SD is clean and no dirt,
particles and fiber attached on it! Otherwise replace a
new one.
Turn it over.
Press to snap the Cap Micro SD.
Do the same to the other Water Indicator.
1267-1071 Rev 2
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Sony Mobile Communications AB – Company Internal
Working Instructions (mech)
54(76)