iphone 6 light - GSM-Forum

LIKE_ · 03-24-2017, 07:53

hello , i have an iphone 6 that have backlight issue so i've changed the backlight circuit and jumped filter 2024 and change chestnut ic and checked all filters and still no backlight just apple logo without backlight

any ideas???

Pallle · 03-24-2017, 08:54

Hello

Measure the voltages on the TP2518, TP2519, TP2520 with LCD and post it please.

LIKE_ · 03-24-2017, 23:32

Voltages are 3.90 with lcd

Pallle · 03-25-2017, 07:31

3.9V on all three testpoints? Than short under backlight ic.

LIKE_ · 03-25-2017, 10:13

not all of them just bl anode

vinse · 03-25-2017, 10:22

is this the first time you do backlight on the iphone 6 ??
can you post a photo of the mother board zoom on the backlight circuit

test on test point TP2520 how voltage you have when you press the power button (be carrefull )

LIKE_ · 03-26-2017, 16:20

worked by changing the coil the first coil i've changed was bad

Pallle · 03-26-2017, 17:17

Replace D1501 backlight diode.

Shaheed sabu · 03-26-2017, 19:14

friend first check anode path if there is chance for short.then change one by one after checking change back light ic +boosting coil+diode3
it will be fine

LIKE_ · 03-27-2017, 03:10

I have solved the problem by changing the coil

03-24-2017, 07:53	#1 (permalink)
LIKE_ Crazy Poster Join Date: Jan 2017 Posts: 58 Member: 2670415 Status: Offline Thanks Meter: 8	iphone 6 light hello , i have an iphone 6 that have backlight issue so i've changed the backlight circuit and jumped filter 2024 and change chestnut ic and checked all filters and still no backlight just apple logo without backlight any ideas???

03-25-2017, 10:22	#6 (permalink)
vinse Freak Poster Join Date: Jan 2014 Posts: 258 Member: 2106911 Status: Offline Thanks Meter: 67	is this the first time you do backlight on the iphone 6 ?? can you post a photo of the mother board zoom on the backlight circuit test on test point TP2520 how voltage you have when you press the power button (be carrefull ) Last edited by vinse; 03-25-2017 at 10:28.

03-24-2017, 08:54	#2 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	Hello Measure the voltages on the TP2518, TP2519, TP2520 with LCD and post it please.

03-24-2017, 23:32	#3 (permalink)
LIKE_ Crazy Poster Join Date: Jan 2017 Posts: 58 Member: 2670415 Status: Offline Thanks Meter: 8	Voltages are 3.90 with lcd

03-25-2017, 07:31	#4 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	3.9V on all three testpoints? Than short under backlight ic.

03-25-2017, 10:13	#5 (permalink)
LIKE_ Crazy Poster Join Date: Jan 2017 Posts: 58 Member: 2670415 Status: Offline Thanks Meter: 8	not all of them just bl anode

03-26-2017, 16:20	#7 (permalink)
LIKE_ Crazy Poster Join Date: Jan 2017 Posts: 58 Member: 2670415 Status: Offline Thanks Meter: 8	worked by changing the coil the first coil i've changed was bad

03-26-2017, 17:17	#8 (permalink)
Pallle Freak Poster Join Date: Jan 2016 Location: Hungary Posts: 362 Member: 2515187 Status: Offline Thanks Meter: 114	Replace D1501 backlight diode.

03-26-2017, 19:14	#9 (permalink)
Shaheed sabu Freak Poster Join Date: Sep 2014 Location: delhi Posts: 121 Member: 2250798 Status: Offline Thanks Meter: 19	friend first check anode path if there is chance for short.then change one by one after checking change back light ic +boosting coil+diode3 it will be fine

03-27-2017, 03:10	#10 (permalink)
LIKE_ Crazy Poster Join Date: Jan 2017 Posts: 58 Member: 2670415 Status: Offline Thanks Meter: 8	I have solved the problem by changing the coil