E330 very strange keys problem - check this out

[scorpion13]

Hi all,

I have E300 with keys not working. It was water damaged, I cleaned it and reflowed it - no joy, replaced the mic - keys working fine. BUT one day later the customer is bringing the phone back with the same problem - keys not working, only power on.

I am working on it at the moment and very strange thing happened. Suddenly the phone beeped and the keys started working again.....after 2 min while I was pressing/testing the keys they stopped working again.

What could be the solution. Any advice please

Best regards
Scorpion_13

[GSMDUNYASI.COM]

Hi all,

I have E300 with keys not working. It was water damaged, I cleaned it and reflowed it - no joy, replaced the mic - keys working fine. BUT one day later the customer is bringing the phone back with the same problem - keys not working, only power on.

I am working on it at the moment and very strange thing happened. Suddenly the phone beeped and the keys started working again.....after 2 min while I was pressing/testing the keys they stopped working again.

What could be the solution. Any advice please

Best regards
Scorpion_13

microfhono +flex change %100

[MBtech]

This isn't strange if the phone is water dammaged..
Use the circuit diagram and remove v700, v702, v704, v705, v706, v707, D700 and D701 and all will be OK (I.S.L) ;)
Good luck.

[bossko]

E300 havent this components. Have anyone solved this problem or not? KEY_COL and KEY_ROW are going direct to U601 ...

[bossko]

my solutions, it was help me 100%: