n 72 network problem

[irfan1994shaikh]

i have one nokia n72 network problem ,

please give the solution

[amiralmahy]

try this

[IMG]http://1.bp.********.com/_haRAPmO1Seg/TT8GCKX05VI/AAAAAAAABBI/Os0mLeTUJf0/s320/Nokia+E73+no+network+signal+solution.png[/IMG]

In troubleshooting RF signal problem you may need to have a frequency counter to make it easy to repair, but you may also fix it by doing it manually.
First, check the all supply voltages that feeds to each of the RF circuit chips like the RF power amplifier and RF IC.

There is an RF power supply controller that also feeds the secondary supply other than the battery supply voltage of 3.7 volts.
You can check it trough the filter coils., If these supply voltages are missing it means that the RF power management IC is faulty. Rework or replace it if necessary.

If all the supply voltage is okay, check the RF clock oscillator or try to replace it.

If the clock oscillator is okay, rework the RF Power Amplifier (PA) replace if necessary.

The RF IC will be the last chips needs to rework or replace for further troubleshooting.


thanks to gsmangel

[guddu ahmad]

Originally Posted by irfan1994shaikh

i have one nokia n72 network problem ,

please give the solution

bro.change rx tx condencer 100% problem solved.tested by me.