N7000 Problem after changing eMMC - GSM-Forum

meshkat_azizi · 11-07-2014, 22:23

Hello everyone,
I received a dead n7000. I changed it's emmc. Now it boots on and receive calls and everything but it has a black screen. I have changed it's LCD and checked everything on display way on the board and also tried different firmwares. Do anyone have an idea? i've heard that i should replace a resistor!
Please share if you have a solution...

mike_shinoda · 11-07-2014, 22:48

Write full dump via riffbox

KorAll · 11-08-2014, 01:16

Quote:

Originally Posted by meshkat_azizi

Hello everyone,
I received a dead n7000. I changed it's emmc. Now it boots on and receive calls and everything but it has a black screen. I have changed it's LCD and checked everything on display way on the board and also tried different firmwares. Do anyone have an idea? i've heard that i should replace a resistor!
Please share if you have a solution...

Check voltage at C502, C503 near LCD connector

Check Vbat at both ends of L505

meshkat_azizi · 11-08-2014, 21:46

hi...
no answer............??

KorAll · 11-08-2014, 21:53

Quote:

Originally Posted by meshkat_azizi

hi...
no answer............??

Check all elements near U509. They all must be good, except "cold solder".

Check R519.

116zar · 11-08-2014, 22:26

meshkat_azizi What is the current consumption of a smartphone?
You flashed the correct firmware ?

mike_shinoda · 11-08-2014, 23:12

Mr meshkat
before I have this problem then after write full dump with riff box and fix problem

116zar · 11-08-2014, 23:40

Do anyone have any ideas? I heard that I have to replace the resistor! <-writer meshkat_azizi.
Where did you get this information - share to properly identify your problemmy.

KorAll · 11-09-2014, 18:05

Hey, guys. It is the very simple to check this U509 ic with m/meter. Look:

1. Check Vbat at pin 1 and pin 10 of this ic. If absent, check R519. This R519 have direct way to (+Vbat) connector phone PCB. May do jumper from R519 to (+Vbat) if necessary.
2. Check ways from pin 3 to C502, from pin 8 to C503. If all OK, than next.

3. M/meter mode - diode check. Negative wire to phone ground, positive wire to pin 4 of U509 and see:

a) if lsd shine, it mean bad EL_ON signal. b) lcd not shine - it mean bad U509.

nuhsrok · 11-10-2014, 00:14

Thanks, KorAll. It is good idea to use m/meter as EL_ON signal.

meshkat_azizi · 11-11-2014, 07:09

As i mentioned in my first post i have already checked the lcd way and none of answers above helped. I changed eMMC and now its working properly. Thanks anyway

gulag · 11-14-2014, 13:33

Quote:

Originally Posted by KorAll

Hey, guys. It is the very simple to check this U509 ic with m/meter. Look:

1. Check Vbat at pin 1 and pin 10 of this ic. If absent, check R519. This R519 have direct way to (+Vbat) connector phone PCB. May do jumper from R519 to (+Vbat) if necessary.
2. Check ways from pin 3 to C502, from pin 8 to C503. If all OK, than next.

3. M/meter mode - diode check. Negative wire to phone ground, positive wire to pin 4 of U509 and see:

a) if lsd shine, it mean bad EL_ON signal. b) lcd not shine - it mean bad U509.

Hi, KorAll. I'm checked U509 quality, it is good (lcd shine). How is it possible to restore EL_ON signal way? Thank's.

KorAll · 11-15-2014, 00:07

Quote:

Originally Posted by gulag

Hi, KorAll. I'm checked U509 quality, it is good (lcd shine). How is it possible to restore EL_ON signal way? Thank's.

Check way from pin 4 of U509 to pin 37 of HDC501. If broken, than do jumper -

hoosain assani · 11-16-2014, 21:12

hello guys
i want to restore EL_ON line
my lcd had shined
but i want to know where the EL_ON command comes from????
i have searched the schematics but with no hope.
does any body know ???

waiting for reply

thanks.

KorAll · 11-17-2014, 17:57

Quote:

Originally Posted by hoosain assani

hello guys
i want to restore EL_ON line
my lcd had shined
but i want to know where the EL_ON command comes from????
i have searched the schematics but with no hope.
does any body know ???

waiting for reply

thanks.

There isn't full info about EL_ON way, i'm suppose that there are many additional conditions for them. Look:

And next info from service manual -

Component placement -

Post your additional questions if necessary. Don't forget about thank button

11-07-2014, 22:23	#1 (permalink)
meshkat_azizi Banned Join Date: Jul 2011 Location: IRAN-KARAJ Posts: 106 Member: 1616463 Status: Offline Sonork: 100.1660594 Thanks Meter: 247	N7000 Problem after changing eMMC Hello everyone, I received a dead n7000. I changed it's emmc. Now it boots on and receive calls and everything but it has a black screen. I have changed it's LCD and checked everything on display way on the board and also tried different firmwares. Do anyone have an idea? i've heard that i should replace a resistor! Please share if you have a solution...

11-16-2014, 21:12	#14 (permalink)
hoosain assani Junior Member Join Date: Nov 2014 Posts: 2 Member: 2294116 Status: Offline Thanks Meter: 1	EL_ON restore hello guys i want to restore EL_ON line my lcd had shined but i want to know where the EL_ON command comes from???? i have searched the schematics but with no hope. does any body know ??? waiting for reply thanks.

11-07-2014, 22:48	#2 (permalink)
mike_shinoda No Life Poster Join Date: Feb 2014 Posts: 514 Member: 2136780 Status: Offline Thanks Meter: 68	Write full dump via riffbox

11-08-2014, 21:46	#4 (permalink)
meshkat_azizi Banned Join Date: Jul 2011 Location: IRAN-KARAJ Posts: 106 Member: 1616463 Status: Offline Sonork: 100.1660594 Thanks Meter: 247	hi... no answer............??

11-08-2014, 22:26	#6 (permalink)
116zar Junior Member Join Date: Sep 2010 Posts: 2 Member: 1392221 Status: Offline Thanks Meter: 0	meshkat_azizi What is the current consumption of a smartphone? You flashed the correct firmware ?

11-08-2014, 23:12	#7 (permalink)
mike_shinoda No Life Poster Join Date: Feb 2014 Posts: 514 Member: 2136780 Status: Offline Thanks Meter: 68	Mr meshkat before I have this problem then after write full dump with riff box and fix problem

11-08-2014, 23:40	#8 (permalink)
116zar Junior Member Join Date: Sep 2010 Posts: 2 Member: 1392221 Status: Offline Thanks Meter: 0	Do anyone have any ideas? I heard that I have to replace the resistor! <-writer meshkat_azizi. Where did you get this information - share to properly identify your problemmy.

11-09-2014, 18:05	#9 (permalink)
KorAll Freak Poster Join Date: Dec 2011 Location: Russia, North Ural Age: 68 Posts: 263 Member: 1702061 Status: Offline Sonork: 100.1651562 Thanks Meter: 306	Hey, guys. It is the very simple to check this U509 ic with m/meter. Look: 1. Check Vbat at pin 1 and pin 10 of this ic. If absent, check R519. This R519 have direct way to (+Vbat) connector phone PCB. May do jumper from R519 to (+Vbat) if necessary. 2. Check ways from pin 3 to C502, from pin 8 to C503. If all OK, than next. 3. M/meter mode - diode check. Negative wire to phone ground, positive wire to pin 4 of U509 and see: a) if lsd shine, it mean bad EL_ON signal. b) lcd not shine - it mean bad U509.

11-10-2014, 00:14	#10 (permalink)
nuhsrok Junior Member Join Date: Nov 2014 Posts: 3 Member: 2288132 Status: Offline Thanks Meter: 3	Thanks, KorAll. It is good idea to use m/meter as EL_ON signal.

11-11-2014, 07:09	#11 (permalink)
meshkat_azizi Banned Join Date: Jul 2011 Location: IRAN-KARAJ Posts: 106 Member: 1616463 Status: Offline Sonork: 100.1660594 Thanks Meter: 247	As i mentioned in my first post i have already checked the lcd way and none of answers above helped. I changed eMMC and now its working properly. Thanks anyway