All China Mobiles RDA(6231) Pa Jumper

Rda 6231 pa signal ic  use in many Chaina mobile

phones and its use direct batry volts so this part

falted many times in mobile phones.

if problem in this pa signal ic set go on litle shorted only one 

point at external digital power supply or searching mode and

again searching.set cannot register on cell phone opreator services.

some chaina mobile cell phone in setting use gsm switching mode 

setting like as nokia x2-02 in network option setting option for exemple

gsm900/1800 if your phones setting not set at auto network seraching 

mobile phone network problem created.

first set auto slect these setting and try to power of an power on 

cell phone.

at last problem not solved then check antena connected with pcb antena point 

perfectly .

full and final if problem same and your phone can not searching mobile phone 

opreator network try to remove pa and make these jumper cearfull as picture 

shown below.

RDA 6231 PA IC Jumper Diagram