Introduction.Sony Ericsson K300 is one of small simple Cellphone but full of usefully content. Besides for voice communication and sms, this phone also equipped with GPRS capability and can be used as internet modem via data cable or infra red connection. The specification of this gadged is allso more than enough with 65000 color screen, mp3 player, VGA camera and vidoe player that can play mp3 format music, take a picture or play 3gpp video.
Problem
One of common problem of this phone is keypad problem or joystick problem. It happen after long use, because of dust, sweath, or other liquids stuff. These are the solution to solve keypad problem.
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Solution
1. Open the antena cover using pinset look picture 4 (antena cover is the cover above batery cover that surround the camera look picture 1 above).
2. Unscrew all 4 screw using bit 6 screw driver (picture 3).
3. Open the front cover by sliding from side using thin can or your nail (look picture 2).
4. After you open the front cover you will fine the PCB below the keypad, open the white sticker that cover the PCB key (it calls key foil) and clean the PCB using soft pencil eraser. if necessary you can use 90% alcohol liquids to make easier to clean.
5. For joystick, just clean using 90% alcohol and make easier for lubrication.
6. After you finished, stick the key foil again to the PCB, and reasembled again all phone.
