Learn Here How To Service Network Problems

[sree krishna]

there is two sections in network 1, Rx section. 2, Tx section. all technicians need to use manual searching in mobile phone, testing for Rx section and Tx section.

HOW TO FIND WHICH SECTION IS FAULT Tx (or) Rx?

Testing Rx section

use manual search for Testing Rx section, after searching Rx section good condition means it shows network list like Airtel, hutch, (or) any other network list in your area,

If Rx section bad condition after searching it shows NO NETWORK FOUND

1, after searching it shows network list means Rx section is ok.
2, after searching it shows NO NETWORK FOUND means Rx section is fault.

Testing Tx section

Use manual search for testing Tx section, after searching it shows network list, then you can choose your simcard network, if Tx section is good condition it shows HOME NETWORK SELECTED, if Tx section is fault it shows NO ACCESS.

1, after selecting network it shows HOME NETWORK SELECTED means Tx section is ok.
2, after selected network it shows NO ACCESS means Tx section is fault.


Information of Rx section components and ics nokia dct-3 tech

1, antenna switch

2, RF IC ( Hagar ic )

3, AUDIO IC ( cobba ic)

4, crystal oscillator

5, filters

6, VCO (voltage control oscillator)



Information of Tx section components and ics nokia dct-3 tech

1, PF IC (PA IC)


Information of Rx section components and ics nokia dct-4 tech

1, antenna switch

2, filters

3, RF IC

4, crystal oscillator

5, VCO (voltage control oscillator)

6, UEM IC


Information of Tx section components and ics nokia dct-4 tech


1, PF IC (PA IC)


HOW TO SERVICE Rx SECTION FAULT ?

Solution for Rx section no network found fault nokia dct-3 technolagy

1,clean the pcb well and Rehot (if not ok follow one by one solutions)

1, give antenna switch jumper

2, Rehot the RF IC

3, Rehot the AUDIO IC

4, Reball the RF IC

5, change the RF IC

6, change the AUDIO IC

7, change the crystal oscillator


Solution for Rx section NO NETWORK FOUND fault nokia dct-4 technology

1, clean the pcb well and Rehot (if not ok follow one by one solutions)

2, give antenna switch jumper

3, Reheat the RF IC

4, change the crystal oscillator

5, Reball the RF IC

6, change the RF IC

7, Change filters


HOW TO SERVICE Tx SECTION FAULT ?


Solution for Tx section NO ACCESS fault nokia dct-3 technolagy

1, Change the PF IC


Solution for Tx section NO ACCESS fault nokia dct-4 technolagy


1, Change the PF IC


SOLUTION FOR OTHER NETWORK FUALT


Solution for low network coverage, all models


1, give jumper from antenna contact to cabinet antenna

2, change the antenna switch


Solution for dct-3 technology
When switch on the mobile it shows full network after few seconds its goas down


1, flash - Rebuild ime - UI settings (if not ok follow 2nd solution)

2, check the track from battery +ve point to PA IC, if track is ok then change the good PF IC.



Solution for dct-4 technology
When switch on the mobile it shows full network after few seconds its goas down


1, write good pm file (if not ok follow 2nd solution)

2, change the PF IC, if still the problem same check the PF power track to battery +ve point

[r a nadeem]

dear sree krishna
you are going wel , keep share and give more and more solution
i wish you are my friend .
rashid

[sree krishna]

thank you my friend rashid,

[Pulax]

even though we are very far geographicaly....its nice knowing mates that share thier knowledge to the world....

Thanks mate very helpful hint....

PULAX

[r a nadeem]

Originally Posted by sree krishna

thank you my friend rashid,

Dear br sree krishna, thanks for acceptance for friend ship its my pleasure . you are doing creative and genius work , I inspire with u , and working style .
Regards
Rashid

[sharaz191]

What abt this network fault...Tdy customer bought Ngage phone when i search manually its showing only one operator (Other 3 operators are missing)why is that? All network work under 900/1800..What will be the problem?

[ahhongchai]

Originally Posted by sharaz191

What abt this network fault...Tdy customer bought Ngage phone when i search manually its showing only one operator (Other 3 operators are missing)why is that? All network work under 900/1800..What will be the problem?

bro , they must be the anttena swicht problem...

[adrian_1_]

i have a 6101 with the same problem, can you help me??

[neokia]

your problem solution like at this site...

http://forum.gsmhosting.com/vbb/show...380227&page=21

how you can do that??

[sree krishna]

This Is 100% Antenna Switch Problem First Change

Or Try This Tracks then post reply

[kamee]

this is best doc. I have ever seen on this forum .keep it up and also give me ur cel# so that I can thank u vocally.kamee

[dallas1]

thanks u keep on my pal u are engr

[Begato2002]

thx gr8 work

B.R

Begato2002

[amit123]

Hi Sree Krishna,

What may be the solution of NOKIA 3310 of DCT-3 as NO NETWORK COVERAGE after manual search?

Is there any difference between NO NETWORK FOUND and NO NETWORK COVERAGE?

Your early and thoughtful solution will be appretiated.

Thanks in advance,

amit123

[Lhick]

Thats the same Mate.