Hello,
I have a problem with my mobile phone Nokia 6234: The on/off switch got loose and it was impossible to switch the phone on. I managed to fix the switch, but obviously a small chip disappeared also (see image). I found chips nearby other switches, which seem to be identical to the missing chip. These chips are labelled "55" and in the second row "DD9D". They have 6 contacts in form of balls below the chip.
My question: Who knows, what these chips are? What is the manufacturer and the complete name of the chip? Is it easy to buy this chip? How can this chip be soldered to the board?

Thanks for any comments,
Juergen

 

hello m8

http://imageshack.us/photo/my-images/18/6233onoff.jpg/

 

Hello!

I will replace these two parts. Actually my board really looks, as if only these four pads were used before.

Thanks,
Juergen

 

... and works!
Thank you!
Juergen