Mobile Phones Repairing Tutorials

If usb connector is missing or damage  then change usb connector first. charger not connected check usb connector point on pcb in condition of missing any track make these jumper cearfully as picture shown below. black one is ground and black 2 is empty red and blue is usb in and purple  is for positive volts of charger in

Nokia X6 Mic Not Working Solution By Jumpering. Nokia X6 Mic Point Ways Jumper . Nokia X6 Mic Problem Diagram.

Nokia X3-02 Touch Problem Solution. At touch connector cheack marked point  polarity.if polarity is ok then replace touch digitizer with new . If problem not solved then mach the touch side  connector same as pcb side touch connector xr yt gnd xl yb. now check these green marked parts as picture shown below. Normal rehot or change touch controler ic of touch problem not solve but first 100%confurm that touch ic not working and problem ocured in touch ic. how to check touch on sunwa multi meter. prob one on xr and prob 2 on yt now touch on touch screen and check meter show you polarity when you touch the touch screen. same way to chek xl and yb in many touch like as chania and nokia note these mathed is for not digitizer touch this is for only non digitizer touch pad like as chaina n8 touch. if touch digitizer use ic on strip you cannot check her by multi meter. best way to change the touch understood the xr -yt -gnd-xl-yb point ways from connector and touch connector side. touch digiti

Nokia Asha 305 Signal Problem.No Service Problem Solution first conform that your Antena terminal is a  connected with pcb antena points. if problem not solved then replace the pa signal ic with new or confurm ok pa ic with old or dead  mother board of same number pa  ic like as nokia x2-02  pcb use this pa ic and many other board come with this pa ic. change this with cearfully and set it on pcb corect position as same of old pa ic location. remember old ic location on pcb and then  remove for changing with other pa ic. this is 100%tested by me you see in picture  pa removed to change for other pa ic.  

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