V36xx power-off when connect net

[sjakie]

Hi,

Had this problem before, but never got into it.
Now i want to try it
Could someone tell me what to check first ?

Maybe PA, problem is i dont know name off this.
I have pictures but no code for PA.

Could be PA ?

Thanks
Sjakie

[Bert]

yes, mostly is 1800 p.a faulty , it's marking code is ap119

[Pandemonio100]

Or probably there is one little resistor bad on the RF area. first to change Pa control all resistors.;)

[sjakie]

Thanks for reply.
I discoverd removing U300, makes phone work on 1800mhz without power off.
replaced it with otherone, but again phone switches off wenn connecting to network.
Maybe i destroyed it by soldering ?

Thanks
Sjakie

[sjakie]

Problem found :)

With closer look i saw C485 was sticking to another resistor.
Resoldered, all now ok.

thanks for the help

Regards
Sjakie;)

[sjakie]

Hi, sorry for reopening but have again same problem :((

I desolder 900Mhz PA, phone worked good on 1800mhz.
Second i replaced PA 900, same problem.
Removed 1800 PA, same problem.
Put again another PA 900Mhz, phone seems Ok.
So i closed it up.
After 10 minutes 900 Mhz band getting no RX.
Power off and on phone, 3 seconds 900Mhz RX than Zero RX.
After that sometimes 2 seconds RX on 900Mhz.
Manual search gives all providers including 900Mhz.
When trying to get manual login 900Mhz its say registering than nothing.
Could it be FL470-460 problem ?

Thanks
Sjakie

[xmobile]

Try to Flash phone with Full FLash.
Maybe help