ME45 shuts down when transmiting

[covex]

I have ME45 - it shuts down immediately (no "logout") when transmiting. This does not happen every time when transmiting, but very often. For sure, this depends on a voltage. I tried to use new battery, but no succes - with new battery this happens less but still it happens. When connected to charger then it never happens. I do not think its due to bad sensor values, this should not lead to immediate switch off.

I looked trough whole PCB, but did not find any damage so common for x35 PA.

As the last solution I see to heat whole PCB in some oven. But I am not sure with temperature (probably 250C) and time.. Can anybody help?

Thanx

[genocite]

have u change the pa ?

[covex]

It does not seem to me like PA problem. Phone is not loosing network and has no other signal related problems.

I think there is too many possibilities - most probable is something related to power supply or voltage regulation.
(VBATT capacitor, power IC...?). Changeing more ICs is too expensive solution for this kind of phone and I do not think its easy to get powerIC - it's some siemens ASIC.

Thefore as last possible thing, I'd like to heat whole pcb to avoid bad contacts if any. Then I am giving up...

[genocite]

just try change the pa first

[Denis-hunter]

Change PA!
If not OK - see battery.

[covex]

The strange behaviour was caused by the fact that only 900MHz part of PA was damaged. Therefore phone shuts down only when transimiting in 900MHz network.