Crazy 8210 - GSM-Forum

SPUnlock_SK · 11-30-2003, 19:15

I have crazy problem with 8210. When I strart phone signal is full but aproximatelly after 7sec. signal drop down . I try falsh phone.
/ I change PA, ant.sw,HAGAR, COBBA,filters, oscilator,crystal/
Could be broken CPU?

Any solutions. If someone know solution please help me.

Thanks

Medz · 11-30-2003, 19:47

Check +ve mean continuety across L751, L752 To power-Ampl.
Also check if the phone emmites GSM signal, by the use of a
light antenna sticker or something like that.

malisko · 12-02-2003, 22:48

It can by antena switch, and try to look L553, it can by problem.

Teraz nieèo po slovenky. Si slovák nie??? Odkial si? chcem len vedie, že èo všetko robíš a za ko¾ko, ja som z okolia ZH. Daj vedie, najlepšie cez [email protected]

willy · 12-03-2003, 04:05

Quote:

Originally posted by malisko
It can by antena switch, and try to look L553, it can by problem.

Teraz nieèo po slovenky. Si slovák nie??? Odkial si? chcem len vedie? že èo všetko rob? a za ko¾ko, ja som z okolia ZH. Daj vedie? najlepšie cez [email protected]

HI,

English only

Regards

Willy

Renda · 12-03-2003, 13:17

it will be for 90% RF power problem, so check the area near PA for any damage (missing resistors), check PA power, broken diplex

celtec · 12-04-2003, 09:44

Have U tried to Update FAID or rewrite IMEI and then update FAID ?
BR
Alex

celtec · 12-04-2003, 09:51

Must pay attention when is changed PA, because from plastic case for exsample Philips to metal case Fairchild, phone must be upgraded.
With metal case must be used Murata Biplexer and also u must change or delete some resistor near Processor to allow phone to recognize new PA.
BR
Alex

SPUnlock_SK · 12-04-2003, 17:54

i changed metal PA, updated FAID, ï thing this is not my problem

I will try change IMEI, but i dont now, and do some measuremet around PA...

I will post result. Thanks guys

12-11-2003, 01:07

Just activate NET Monitor, and see resuts of test 01.
You can use Wintesla to put phone in test mode, to see if there is TX working or not.
It can be caused by many thins, you just need to folow right procedure to find fault. Mail me for Service manual and schematic diagrams.

@Celtec
I never saw any other PA in 8210 than PF03103B. Metal case, of course. Some people use PF08105, it can work, but it's designed for 4.8V, not 3.6.
All PCB revisions which i can remember use SAME RX and TX parts.
(C720 is placed in diferent points, but it's connected to same parts on board)
This is not 3310 board we talking about, man.

DEVILvn · 12-11-2003, 06:44

ha ha ha !!!!!!!!
Pls change Power IC!!!!!!!!

apadana · 12-11-2003, 12:07

Hi!
try by change z671

blue1 · 04-06-2004, 20:28

of course maybe is bga damage

world · 03-22-2006, 07:46

try to chang L752 maybe work on u

ekel · 03-22-2006, 17:43

clasic problem. if u alredy change ccount & full fact but still same problem. it must be from cobba, broken ball under it. try to reball or replace cobba

CME · 03-22-2006, 20:46

Guys i think this is a clone 8210 there is no solution i have also got 37 phones of that type waiting

11-30-2003, 19:15	#1 (permalink)
SPUnlock_SK No Life Poster Join Date: Jul 2002 Location: Slovakia Age: 43 Posts: 1,535 Member: 13922 Status: Offline Thanks Meter: 334	Crazy 8210 I have crazy problem with 8210. When I strart phone signal is full but aproximatelly after 7sec. signal drop down . I try falsh phone. / I change PA, ant.sw,HAGAR, COBBA,filters, oscilator,crystal/ Could be broken CPU? Any solutions. If someone know solution please help me. Thanks

12-11-2003, 01:07	#9 (permalink)
legija Guest Posts: n/a Member:	Just activate NET Monitor, and see resuts of test 01. You can use Wintesla to put phone in test mode, to see if there is TX working or not. It can be caused by many thins, you just need to folow right procedure to find fault. Mail me for Service manual and schematic diagrams. @Celtec I never saw any other PA in 8210 than PF03103B. Metal case, of course. Some people use PF08105, it can work, but it's designed for 4.8V, not 3.6. All PCB revisions which i can remember use SAME RX and TX parts. (C720 is placed in diferent points, but it's connected to same parts on board) This is not 3310 board we talking about, man. Last edited by legija; 12-11-2003 at 01:13.

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11-30-2003, 19:47	#2 (permalink)
Medz No Life Poster Join Date: Sep 2003 Age: 66 Posts: 807 Member: 39601 Status: Offline Thanks Meter: 13	Check +ve mean continuety across L751, L752 To power-Ampl. Also check if the phone emmites GSM signal, by the use of a light antenna sticker or something like that.

12-02-2003, 22:48	#3 (permalink)
malisko Junior Member Join Date: Nov 2003 Location: Slovakia Age: 38 Posts: 25 Member: 43164 Status: Offline Thanks Meter: 1	It can by antena switch, and try to look L553, it can by problem. Teraz nieèo po slovenky. Si slovák nie??? Odkial si? chcem len vedie, že èo všetko robíš a za ko¾ko, ja som z okolia ZH. Daj vedie, najlepšie cez [email protected]

12-03-2003, 13:17	#5 (permalink)
Renda Major Poster Join Date: Dec 1999 Location: Prague Posts: 44 Member: 764 Status: Offline Thanks Meter: 0	it will be for 90% RF power problem, so check the area near PA for any damage (missing resistors), check PA power, broken diplex

12-04-2003, 09:44	#6 (permalink)
celtec Freak Poster Join Date: Mar 2003 Location: Rome Italy Posts: 188 Member: 25504 Status: Offline Thanks Meter: 0	Have U tried to Update FAID or rewrite IMEI and then update FAID ? BR Alex

12-04-2003, 09:51	#7 (permalink)
celtec Freak Poster Join Date: Mar 2003 Location: Rome Italy Posts: 188 Member: 25504 Status: Offline Thanks Meter: 0	Must pay attention when is changed PA, because from plastic case for exsample Philips to metal case Fairchild, phone must be upgraded. With metal case must be used Murata Biplexer and also u must change or delete some resistor near Processor to allow phone to recognize new PA. BR Alex

12-04-2003, 17:54	#8 (permalink)
SPUnlock_SK No Life Poster Join Date: Jul 2002 Location: Slovakia Age: 43 Posts: 1,535 Member: 13922 Status: Offline Thanks Meter: 334	i changed metal PA, updated FAID, ï thing this is not my problem I will try change IMEI, but i dont now, and do some measuremet around PA... I will post result. Thanks guys

12-11-2003, 06:44	#10 (permalink)
DEVILvn Freak Poster Join Date: Aug 2003 Location: VietNam Age: 46 Posts: 159 Member: 37678 Status: Offline Thanks Meter: 0	ha ha ha !!!!!!!! Pls change Power IC!!!!!!!!

12-11-2003, 12:07	#11 (permalink)
apadana Freak Poster Join Date: Oct 2003 Location: Tehran - IRAN Age: 50 Posts: 274 Member: 40792 Status: Offline Sonork: APADANA USER Thanks Meter: 24	Hi! try by change z671

04-06-2004, 20:28	#12 (permalink)
blue1 Freak Poster Join Date: Mar 2004 Location: mediteranean Age: 45 Posts: 171 Member: 60613 Status: Offline Thanks Meter: 0	of course maybe is bga damage

03-22-2006, 07:46	#13 (permalink)
world Crazy Poster Join Date: Dec 2005 Posts: 51 Member: 206394 Status: Offline Thanks Meter: 1	try to chang L752 maybe work on u

03-22-2006, 17:43	#14 (permalink)
ekel No Life Poster Join Date: Nov 2004 Location: Indonesia Posts: 688 Member: 90761 Status: Offline Sonork: 1617079 Thanks Meter: 95	clasic problem. if u alredy change ccount & full fact but still same problem. it must be from cobba, broken ball under it. try to reball or replace cobba

03-22-2006, 20:46	#15 (permalink)
CME Freak Poster Join Date: Mar 2006 Location: Kewempe Bombo rd Posts: 227 Member: 245586 Status: Offline Thanks Meter: 18	Guys i think this is a clone 8210 there is no solution i have also got 37 phones of that type waiting