here is an other diagram and source is gsm srilanka in this diagram we see scratched area and a link from the batter terminal to this point is indicated
Category: Sony Ericsson K310i
in this post i am posting a diagram that will indicate the accurate location of ringer buzzer ic in sony ericsson k310i.so check this area if ringer buzzer is not working in sony ericsson...
if you are facing joy stick problem in sony ericsson K310i and joy stick prints are also damage then it is a serious condition what to do
here is a diagram to solve mic problem in Sony ericsson K310i.so this diagram will help for Sony Ericsson K310i Mic Not Working Problem Solution Ways Track.