iphone 4 no service -> searching....... water? - GSM-Forum

bash0r · 11-30-2012, 18:41

I must clean the logicboard, OK! But what is with C251? It looks burned? Can some help me?

mr. wites

Quote:

Originally Posted by Wites OM Tesla

Check FL3_RF,R500_RF resolder XW24_RF replace L92_RF if voltage still not appear during boot for some seconds unsolder U11_RF and i will guide further.

hm?

Levani_Pmic · 11-30-2012, 18:48

bro date and time in your phone is correct?

bash0r · 11-30-2012, 19:03

Quote:

Originally Posted by mkleli55

bro date and time in your phone is correct?

yes

i check allready all here in the forum ;D

i know since ios 6 the bug with the date, after battery connector

but thxxx

bash0r · 11-30-2012, 19:18

Quote:

Originally Posted by Wites OM Tesla

No it is short but not complete because of skyworks and a filter to gnd,better check if appear on C343_RF 3V during boot,do like this don't connect dock flex power on put one probe to cap with other to gnd and wait if it appear it is very good if no then we see further.
What you mean in the title "but special"?

i have 2.7V on C343_RF on boot in the first 5-8 sec........

kostelectronics · 11-30-2012, 20:11

First: Do you have the IMEI in the menu? I can help you i think

bash0r · 11-30-2012, 20:23

YES, imei is there !

bash0r · 11-30-2012, 20:33

ok, i have clean the logicboard a littlebit...

but no service ->searching->no service..

dragosgsm · 12-03-2012, 13:30

Quote:

Originally Posted by bash0r

ok, i have clean the logicboard a littlebit...

but no service ->searching->no service..

I need to find how to jumper the glass ic from this picture!!!
It was shorted and the phone was not turning on ,and after I have remove it the phone turns on and it has no network.

kostelectronics · 12-01-2012, 01:09

Check for Battery voltage here! It must be on both sides!

bash0r · 12-01-2012, 01:18

yes on both sides, 3,7V~

good or not good? :|

bash0r · 12-01-2012, 11:17

Hmmm, Need help

(((

cylir08 · 12-01-2012, 16:10

just replace FL3_RF bro..even if there is voltage just replace that,if it is not ok check U11_RF if neccesary reball it and also check R500_RF there is 2.8 volts there and it has a connection in the power amp (skyworks)

bash0r · 12-01-2012, 16:27

iphone is on!

R500_RF = 1.5-2.5V~ but not always .... only when the iphone search the network :/

FL3_RF = 3V~

FL3_RF replace, or can i make a jumper? where can i get FL3_RF ?

bash0r · 12-01-2012, 16:27

iphone is on!

R500_RF = 1.5-2.5V~ but not always .... only when the iphone search the network :/

FL3_RF = 3V~

FL3_RF replace, or can i make a jumper? where can i get FL3_RF ?

cylir08 · 12-01-2012, 17:28

Quote:

Originally Posted by bash0r

iphone is on!

R500_RF = 1.5-2.5V~ but not always .... only when the iphone search the network :/

FL3_RF = 3V~

FL3_RF replace, or can i make a jumper? where can i get FL3_RF ?

if you dont have another board to get that FL3 make a jumper on it..and check if it is working..if its not then u will have to find from another board,that cap is important in signal part

i repaired 4 no signal problem just by replacing that cap,,hope it helps for you too

11-30-2012, 18:48	#2 (permalink)
Levani_Pmic No Life Poster Join Date: Oct 2011 Location: tbilisi, georgia Age: 33 Posts: 858 Member: 1679251 Status: Offline Thanks Meter: 385	bro date and time in your phone is correct?

11-30-2012, 20:11	#5 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	First: Do you have the IMEI in the menu? I can help you i think

11-30-2012, 20:23	#6 (permalink)
bash0r Insane Poster Join Date: Dec 2008 Posts: 79 Member: 935953 Status: Offline Thanks Meter: 17	YES, imei is there !

11-30-2012, 20:33	#7 (permalink)
bash0r Insane Poster Join Date: Dec 2008 Posts: 79 Member: 935953 Status: Offline Thanks Meter: 17	ok, i have clean the logicboard a littlebit... but no service ->searching->no service..

12-01-2012, 01:09	#9 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	Check for Battery voltage here! It must be on both sides!

12-01-2012, 01:18	#10 (permalink)
bash0r Insane Poster Join Date: Dec 2008 Posts: 79 Member: 935953 Status: Offline Thanks Meter: 17	yes on both sides, 3,7V~ good or not good? :\|

12-01-2012, 11:17	#11 (permalink)
bash0r Insane Poster Join Date: Dec 2008 Posts: 79 Member: 935953 Status: Offline Thanks Meter: 17	Hmmm, Need help (((

12-01-2012, 16:10	#12 (permalink)
cylir08 Major Poster Join Date: Jul 2009 Location: deira,dubai Posts: 47 Member: 1070846 Status: Offline Thanks Meter: 4	just replace FL3_RF bro..even if there is voltage just replace that,if it is not ok check U11_RF if neccesary reball it and also check R500_RF there is 2.8 volts there and it has a connection in the power amp (skyworks)

12-01-2012, 16:27	#13 (permalink)
bash0r Insane Poster Join Date: Dec 2008 Posts: 79 Member: 935953 Status: Offline Thanks Meter: 17	iphone is on! R500_RF = 1.5-2.5V~ but not always .... only when the iphone search the network :/ FL3_RF = 3V~ FL3_RF replace, or can i make a jumper? where can i get FL3_RF ?

12-01-2012, 16:27	#14 (permalink)
bash0r Insane Poster Join Date: Dec 2008 Posts: 79 Member: 935953 Status: Offline Thanks Meter: 17	iphone is on! R500_RF = 1.5-2.5V~ but not always .... only when the iphone search the network :/ FL3_RF = 3V~ FL3_RF replace, or can i make a jumper? where can i get FL3_RF ?