iphone 3gs no light solution to all - Page 2 - GSM-Forum

Vinace-tech · 05-07-2010, 02:58

thank you sir...........................................

iamisraeli · 05-12-2010, 21:05

how you replace it?

it to small! i cant get to it...

can someone help me please?

SHAUNV · 05-14-2010, 18:34

I replaced coil (6R8) worked 100%, good job brother!

shoggot · 05-14-2010, 23:18

Is it ok to use a 3r3 from a k850i?

ultratrickster · 06-04-2010, 06:40

Can anyone post the coil for the 3g model??? And can i use the coil from a ds lite?

sergius · 06-05-2010, 10:59

nice information very thanks

neven1992 · 06-05-2010, 15:18

3G model, please! 3G model, please!

dave62530 · 06-08-2010, 00:41

does anybody know how the specs on the iphone coil and how to check the coils of other devices to see if they are in spec? I know that most devices have a coil of some kind in them.

fifty-4 · 08-31-2010, 10:31

Quote:

Originally Posted by : ronfreek :

here is how i solved it
whel the problem is the coil
this one and the coil i used is from k800i
and its called r220
br
ron

thanks verry verry much nice work, (i used coil from se k500,

fifii69 · 08-31-2010, 18:01

hello I have not backlight in my iphone 3GS. I changed coil but still not work. Probably DC/DC converter is faulty but I dont know where can I buy it. Does anyone have any idea for this?

tayfix · 09-29-2010, 12:32

I also replaced the coil with a new original 6R8 and the backlight still doesn't work. Does anyone have a suggestion? I found a fix with a bypass but I don't really know if I whant to do that.

Can someone suggest where on the mainboard I should check for continuity or how to check if the problem is not with the LCD screen or 6R8 coil.

tayfix · 09-29-2010, 15:49

I did a test...

Pin 1 (A) on 6 pin chip (to left of 6r8 inductor) is continuous with pin 3 (B) of LCD connector. This is also continuous with the lower gold contact point 2 (C) of the left-most pair of contact points along the top left edge on bottom of the board.

Pin 6 (A) on 6 pin chip is continuous with coil.

The coil is continuous, cca. 0.7 ohm.

Pin1 of the LCD connector is continuous with the inboard solder pad of the two LED connections on the LCD unit. It is also continuous with the upper gold contact point 1 (C) in the leftmost pair of contacts along the top left edge on the bottom of the board.

Help me out please.

fifii69 · 09-29-2010, 18:17

@tayfix
there is broken DC/DC converter (on 1th picture on the left side coil)

sekimm · 09-29-2010, 18:30

n70 coil work fine for me !!
Thank you very much
Riparazione iphone - Ripara il tuo iphone - Torino

tayfix · 09-30-2010, 09:01

Can someone tell if this is correct, pin 3 (B) powers the backlight on the LCD, where is the returning point, does the current from backlight LEDs return through pin 2 (B) or through some other pin??? Please help, need to do some tests.

05-12-2010, 21:05	#17 (permalink)
iamisraeli Junior Member Join Date: May 2010 Posts: 1 Member: 1302265 Status: Offline Thanks Meter: 1	Hi. how you replace it? it to small! i cant get to it... can someone help me please?

06-05-2010, 15:18	#22 (permalink)
neven1992 Junior Member Join Date: Mar 2010 Posts: 16 Member: 1266409 Status: Offline Thanks Meter: 4	3g! 3G model, please! 3G model, please!

09-29-2010, 18:30	#29 (permalink)
sekimm Major Poster Join Date: Feb 2002 Location: italy Posts: 43 Member: 9648 Status: Offline Thanks Meter: 0	iphone 3gs no light solution to all n70 coil work fine for me !! Thank you very much Riparazione iphone - Ripara il tuo iphone - Torino

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05-07-2010, 02:58	#16 (permalink)
Vinace-tech Freak Poster Join Date: Mar 2006 Posts: 112 Member: 247639 Status: Offline Thanks Meter: 29	thank you sir...........................................

05-14-2010, 18:34	#18 (permalink)
SHAUNV Junior Member Join Date: Jun 2008 Posts: 29 Member: 784372 Status: Offline Sonork: SHAUNV Thanks Meter: 4	I replaced coil (6R8) worked 100%, good job brother!

05-14-2010, 23:18	#19 (permalink)
shoggot Junior Member Join Date: May 2010 Posts: 1 Member: 1298154 Status: Offline Thanks Meter: 0	Is it ok to use a 3r3 from a k850i?

06-04-2010, 06:40	#20 (permalink)
ultratrickster Junior Member Join Date: Jun 2010 Posts: 1 Member: 1317552 Status: Offline Thanks Meter: 0	Can anyone post the coil for the 3g model??? And can i use the coil from a ds lite?

06-05-2010, 10:59	#21 (permalink)
sergius Freak Poster Join Date: May 2004 Age: 43 Posts: 261 Member: 64591 Status: Offline Thanks Meter: 11	nice information very thanks

06-08-2010, 00:41	#23 (permalink)
dave62530 Junior Member Join Date: Jun 2010 Posts: 1 Member: 1317399 Status: Offline Thanks Meter: 0	does anybody know how the specs on the iphone coil and how to check the coils of other devices to see if they are in spec? I know that most devices have a coil of some kind in them.

08-31-2010, 18:01	#25 (permalink)
fifii69 Junior Member Join Date: Jan 2004 Location: Poland Posts: 14 Member: 49250 Status: Offline Thanks Meter: 3	hello I have not backlight in my iphone 3GS. I changed coil but still not work. Probably DC/DC converter is faulty but I dont know where can I buy it. Does anyone have any idea for this?

09-29-2010, 12:32	#26 (permalink)
tayfix Major Poster Join Date: Sep 2010 Posts: 43 Member: 1405991 Status: Offline Thanks Meter: 11	I also replaced the coil with a new original 6R8 and the backlight still doesn't work. Does anyone have a suggestion? I found a fix with a bypass but I don't really know if I whant to do that. Can someone suggest where on the mainboard I should check for continuity or how to check if the problem is not with the LCD screen or 6R8 coil.

09-29-2010, 15:49	#27 (permalink)
tayfix Major Poster Join Date: Sep 2010 Posts: 43 Member: 1405991 Status: Offline Thanks Meter: 11	I did a test... Pin 1 (A) on 6 pin chip (to left of 6r8 inductor) is continuous with pin 3 (B) of LCD connector. This is also continuous with the lower gold contact point 2 (C) of the left-most pair of contact points along the top left edge on bottom of the board. Pin 6 (A) on 6 pin chip is continuous with coil. The coil is continuous, cca. 0.7 ohm. Pin1 of the LCD connector is continuous with the inboard solder pad of the two LED connections on the LCD unit. It is also continuous with the upper gold contact point 1 (C) in the leftmost pair of contacts along the top left edge on the bottom of the board. Help me out please.

09-29-2010, 18:17	#28 (permalink)
fifii69 Junior Member Join Date: Jan 2004 Location: Poland Posts: 14 Member: 49250 Status: Offline Thanks Meter: 3	@tayfix there is broken DC/DC converter (on 1th picture on the left side coil)

09-30-2010, 09:01	#30 (permalink)
tayfix Major Poster Join Date: Sep 2010 Posts: 43 Member: 1405991 Status: Offline Thanks Meter: 11	Can someone tell if this is correct, pin 3 (B) powers the backlight on the LCD, where is the returning point, does the current from backlight LEDs return through pin 2 (B) or through some other pin??? Please help, need to do some tests.