power management ic - GSM-Forum

simi240 · 06-19-2013, 20:28

Hi people im new on here and new to fixing phones really. iv got a iphone 4 has no life at all, put a working battery in and charger still nothing the power ic gets warm too. iv tried to disconnected everything to see if it was the screen ect but made no difference. just looking for advise really what i should check.

cheers simon.

cal_guy · 06-20-2013, 02:39

Check + and - terminal for short. If not then change PMIC.

simi240 · 06-22-2013, 14:28

just checked the voltage and it come back with 1.19v on the usb charger what should i check next.

thanks simon.

simi240 · 06-22-2013, 17:52

is there anything else i should check before changing the ic, also is there anything to remove the glue

Mobile Fix Simple · 06-23-2013, 05:32

Quote:

Originally Posted by simi240

is there anything else i should check before changing the ic, also is there anything to remove the glue

Preheat the board, heat the glue and use cutter to clear the glue slowly. After the glue is clear, heat the chip and use a tiny tip or cutter to lift up the chip, give the chip with a GENTLE LIFT SLOWLY, otherwise the pins under the chips will be broken.

simi240 · 06-24-2013, 13:20

ok thanks i will give it ago tonight

chocob0y · 07-09-2013, 07:45

i am also facing same problem can anyone help

kostelectronics · 07-09-2013, 09:54

Before changing any IC: Check if one of the Outputs are shorted! The PMIC get's hot in this case! Also check if the PP1V35 and PP1V8_SDRAM going up and go back to 0V after pressing the power button for 0.5sec and release it after. If the voltages stay, check for Shorts at the Output first. I've had only 5 times that the PMIC on a 4 was bad after more than 700 repairs!

chocob0y · 07-10-2013, 14:57

i have iphone 4 .... it has no life ...but when i connect it on charging the red charging logo comes on screen but the iphone is not charging at all and pmic is getting very hot and hot ...i tried to replace the battery but then also same problem continuess.....what might be the problem

kostelectronics · 07-10-2013, 15:10

water damaged?

did you use a CCC ( cheap china-charger? )

chocob0y · 09-17-2013, 10:39

Quote:

Originally Posted by kostelectronics

water damaged?

did you use a CCC ( cheap china-charger? )

yes

now what should i do ?

chocob0y · 07-12-2013, 14:29

i have iphone 4 .... it has no life ...but when i connect it on charging the red charging logo comes on screen but the iphone is not charging at all and pmic is getting very hot and hot ...i tried to replace the battery but then also same problem continuess.....what might be the problem

dog68 · 09-17-2013, 23:24

Change the pmic!!

Don't worry, the pmic on the iphone 4 is EASY , easiest ic on board.

06-19-2013, 20:28	#1 (permalink)
simi240 Junior Member Join Date: Jun 2013 Posts: 12 Member: 1963115 Status: Offline Thanks Meter: 1	power management ic Hi people im new on here and new to fixing phones really. iv got a iphone 4 has no life at all, put a working battery in and charger still nothing the power ic gets warm too. iv tried to disconnected everything to see if it was the screen ect but made no difference. just looking for advise really what i should check. cheers simon.

06-20-2013, 02:39	#2 (permalink)
cal_guy No Life Poster Join Date: Oct 2010 Location: Toronto, Canada Posts: 948 Member: 1430995 Status: Offline Sonork: 100.1613203 Thanks Meter: 312	Check + and - terminal for short. If not then change PMIC.

06-22-2013, 14:28	#3 (permalink)
simi240 Junior Member Join Date: Jun 2013 Posts: 12 Member: 1963115 Status: Offline Thanks Meter: 1	just checked the voltage and it come back with 1.19v on the usb charger what should i check next. thanks simon.

06-22-2013, 17:52	#4 (permalink)
simi240 Junior Member Join Date: Jun 2013 Posts: 12 Member: 1963115 Status: Offline Thanks Meter: 1	is there anything else i should check before changing the ic, also is there anything to remove the glue

06-24-2013, 13:20	#6 (permalink)
simi240 Junior Member Join Date: Jun 2013 Posts: 12 Member: 1963115 Status: Offline Thanks Meter: 1	ok thanks i will give it ago tonight

07-09-2013, 07:45	#7 (permalink)
chocob0y Junior Member Join Date: May 2013 Posts: 11 Member: 1930818 Status: Offline Thanks Meter: 0	i am also facing same problem can anyone help

07-09-2013, 09:54	#8 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	Before changing any IC: Check if one of the Outputs are shorted! The PMIC get's hot in this case! Also check if the PP1V35 and PP1V8_SDRAM going up and go back to 0V after pressing the power button for 0.5sec and release it after. If the voltages stay, check for Shorts at the Output first. I've had only 5 times that the PMIC on a 4 was bad after more than 700 repairs!

07-10-2013, 14:57	#9 (permalink)
chocob0y Junior Member Join Date: May 2013 Posts: 11 Member: 1930818 Status: Offline Thanks Meter: 0	i have iphone 4 .... it has no life ...but when i connect it on charging the red charging logo comes on screen but the iphone is not charging at all and pmic is getting very hot and hot ...i tried to replace the battery but then also same problem continuess.....what might be the problem

07-10-2013, 15:10	#10 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	water damaged? did you use a CCC ( cheap china-charger? )

07-12-2013, 14:29	#12 (permalink)
chocob0y Junior Member Join Date: May 2013 Posts: 11 Member: 1930818 Status: Offline Thanks Meter: 0	i have iphone 4 .... it has no life ...but when i connect it on charging the red charging logo comes on screen but the iphone is not charging at all and pmic is getting very hot and hot ...i tried to replace the battery but then also same problem continuess.....what might be the problem

09-17-2013, 23:24	#13 (permalink)
dog68 No Life Poster Join Date: Mar 2012 Location: cambridgeshire, England Age: 55 Posts: 760 Member: 1728699 Status: Offline Thanks Meter: 212	Change the pmic!! Don't worry, the pmic on the iphone 4 is EASY , easiest ic on board.