Help needed for a new reapirer

[raja3333]

Hello friends,

I have been reading this forum for maybe about a year now, and have learned a lot from here.

I have just started repairing handsets, and am facing some problems....

Is this the right place to ask them?

[Fre3 Crack3r]

Hi

Yes . . this is rigth place for nokia repaire section . U can ask what U want

If U need ask in outher modele only check in man page and U will see

Regards . .

[raja3333]

Thanks friend

I have 2 Nokia 3310 which register to network, both 900 and 1800 mhz, but leave the network after 10 seconds.

What should be the solution?

regards.

[rajumobile]

@ Mr.raja3333

Use of jumper trick on antenna switch may create problem in your PA. Check vbatt line near PA. The phone leaves network after few seconds means your Rx part is OK but you've got problem in Tx path. Try to check or replace PA and antenna switch. Netmonitor is good measurement.

Good luck.....

regards.

[raja3333]

Thanks friends for your replies....

I have already changed the PA, the antenna switch, re heated the entire network section, but the problem remains...

As regards Netmonitor, I know how to activate it, but do not know how to understand it sorry am a newbie here

Also by check vbatt near PA how do I do it?

Sorry for all my questions..

Regrads...
Raja3333

Ps I have got my ICQ number. It is 310313946

[maciekmm]

You must flash your phone with new software 5.57 or new. You can write virgin eprom too. And update FAID and IMEI with nokia tool or other soft. If your phone have no network after about 10 sec, try to change all GSM and DCS filters. Not once, you must change all filters from good phone.(complete)

[Yoda_Brno]

Please, before changing anything and heating PCB always do following>

1. Make SW update to last possible version, include recalculating FAID, IMEI, and FFS init.
2. When signal falling after 10 secs. check VBATT lines,
3. If made point 1. and 2. then start with changing and reheating.

[goldenboy]

ill go if u gone give me free milk?
no im only joking!
i have two member here who loved to go to other country,
i can asure you they r best of the best,
colord phone is their experties

email me at my mail
[email protected]

any offer to america il go

[raja3333]

Oh my ***!!!

I am surprised at the response my question has generated.

Yoda Brno has even uploaded a picture! Thanks man! I really appreciate the help I am getting here.

You know what, now I am getting the feeling that I will go a long way in this field, if I have so many well wishing friends to help me out!

This is my World now :>

PS: What should I check at the points in the picture? continuity at them with a multimeter, or voltage in battery connected position? and if so, how much voltage should be there?

[Yoda_Brno]

Check continuity. (beep it) voltage should be 3.6V

[raja3333]

Thanks!

I will report after checking tomorrow

Regards!

[raja3333]

Hello Friends!

I checked for continuity...
It was not present, so I made a jumper connection.
Now there is continuity, but the problem still remains.
Now, there is loss of network after 5 to 6 seconds!

Help me! I have many pieces that I have to return because I cannot solve this problem :{

[kokos]

Today I repaired one phone with exactly the same problem as you are discribing...Tried everything flashing changing the antenna switch and the pa from working phones BUT the problem was not solved Until I changed L515 from the above schematic...
Hope I helped somebody...
Phone symptoms.

[daanish]

Dear Raja i have solved many problems like the one you are faceing by reflowing or changing the hagar ic,try that .
wbr Daanish

[sumeda]

also me too solved same problem like you discribe now reating cobba ic.in my case phone model was 8210.try to heat cobba also apply enough flux to do that.

BR,