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Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section. |
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02-20-2004, 19:54 | #1 (permalink) |
Freak Poster Join Date: Feb 2004 Age: 55
Posts: 491
Member: 52884 Status: Offline Thanks Meter: 13 | 3310 power/no network |
02-20-2004, 22:47 | #3 (permalink) |
Freak Poster Join Date: Dec 2003 Location: E G Y P T Age: 47
Posts: 336
Member: 45635 Status: Offline Thanks Meter: 20 | 3310 no network check external ant. and its connection to pcb , change ant. sw. , rehot hagar and cobba , if not change them , change ccont ........ |
02-20-2004, 23:55 | #4 (permalink) |
Freak Poster Join Date: Aug 2003
Posts: 193
Member: 37787 Status: Offline Thanks Meter: 0 | hi there.. if you have changed the ccont and you are getting the correc voltages eg 2.6 or 2.8v on the 26meg then it could be the flash chips the haggar. most prob the flash chips though. if your phone has no signal and none when doing a manual search the i would reflow the haggar and cobba. then if you still get nothing change the cobba first but then you need to do a faid update. as the imei data is in the cobba. energy managment can only be done when the phone is working and i dont know if there is any generic hardware that can do it. hope this helps. |
02-21-2004, 13:48 | #5 (permalink) |
Freak Poster Join Date: Feb 2004 Age: 55
Posts: 491
Member: 52884 Status: Offline Thanks Meter: 13 | 3310 power/no network thanks 4 tips.i think my problem is a little bit education.u see i have gone through techincal trainging but all of d trainging school we have in nigeria dont actualy teach hardware.when tell them about power/no-network in phone they tell it can not be repair,that is why i have taking time in do reasch/reading alot of repair book including practical training me self.i hav tried removing hagar and replacing it back,but to my surprise d phone did not power-on.likewise with d power ic too.i think what i need now is visual aid (cd)where practical demostration is been carried out.(reoving/replacing ic/reballing).pls if u have such/can produce such 4 a fee,i dont mind.because i do repairs and it be of a great advantage to me.thanks. |
02-21-2004, 16:08 | #6 (permalink) | |
Insane Poster Join Date: Jan 2001 Location: Latvia Age: 52
Posts: 88
Member: 3022 Status: Offline Thanks Meter: 1 | Quote:
For first , you must make rules for yourself step by step in diagnostic of phone ,why phone not work, if you replace ICs one by one this is long and not good way for repairing In the most common cases the problem with phones is his customer! Yes man! They wash with phones in bath, play ******** with phones,throw in to wall.... then go to workshop and tell to you bla bla bla.... yesterday my phone was worked, today this bu....it not work.... Try to speak with customer why phone not working If phone was water damaged,clean PSB than to check holes between layers especially power lines, check data in flash memory(try reprogramm phone), check system clock(main oscillator 13MHz,26MHz,19.5MHz depend on phone model) if system oscillator broken you phone will never power up in all modes ,check visually under microscope the most component on PCB, try find seriously damaged than replace if find. If phone is knocked, you must try find broken soldering of component, especially solder balls under BGA(only one way - remove the component and check visually), try find mechanically damaged components, for example Nokia8210 drop network: in most cases reason is broken soldering under COBBA, try to check all ceramic component like filters, PA, antenna switch, there can be cracks. But the first step on phones with no power always must be - Check Power! Check resistance on battery contacts, check power lines from battery to power IC, try to check voltage on secondary power lines from power IC, check soldering of this IC, for me the 80 % of all failures is bad soldering and mechanically damaged components. Good Luck! WBR Max | |
The Following User Says Thank You to Madxim For This Useful Post: |
02-21-2004, 20:58 | #7 (permalink) |
Freak Poster Join Date: Feb 2004 Age: 55
Posts: 491
Member: 52884 Status: Offline Thanks Meter: 13 | thanks anyway,most of what u say are correct.i work on some and they do work at lesat60%.4 example removing ic and checking 4 broken ball,afer doing that,d problem of reballing,and after putting d ic back to make it work again is my most problem.i can read chart properly.i will be happy if you have visual aid. |
02-22-2004, 00:35 | #9 (permalink) | |
Insane Poster Join Date: Jan 2001 Location: Latvia Age: 52
Posts: 88
Member: 3022 Status: Offline Thanks Meter: 1 | Quote:
1. You should choose temperature correctly ~250-300C 2. Before you start heat up the chip first preheat hot air tool 2-3 minutes 3. You should choose time correctly (otherwise you can overheat IC), you must heat up chip not so long,the best way to define that chip can be removed or it was already soldered is a easy movement of the chip under influence of a air flow (you can see it under microscope), it means that solder completely has fused, time about 1-2 minutes from a start of heating(depend on size of chip and PCB configuration) 4. For soldering back time about 0.5-1 minutes 5. For reballing i choose temp. ~200-250C, for first, study on old or damaged ICs, and i sure after some quantity you will do it fast and with good quality WBR Max | |
02-22-2004, 20:23 | #11 (permalink) | |
Freak Poster Join Date: Feb 2004 Age: 55
Posts: 491
Member: 52884 Status: Offline Thanks Meter: 13 | Quote:
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07-15-2011, 09:30 | #12 (permalink) |
Junior Member Join Date: Jul 2011
Posts: 1
Member: 1615013 Status: Offline Thanks Meter: 0 | Интересные ос Интересные особенности читаем прямо здесь. |
07-19-2011, 05:27 | #13 (permalink) |
Junior Member Join Date: Jul 2011
Posts: 1
Member: 1617436 Status: Offline Thanks Meter: 0 | Интересные ва Интересные важности смотрим прямо здесь. |
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