iPad 2 Problem Blackilight - GSM-Forum

tchang86 · 01-30-2015, 16:19

hello,

i need help about a blacklight problem on ipad 2, i checked the motherboard and i seen that a capacitor was cracked, its the C2220 on the fisrt pic (i looked the reference on a Layer iPad 2), i removed this componment and i want to replace it by an other, so i found a capacitor on the web and i bought it and try to mount it on.
After that, i try to check if the blacklight is ok but it still dont work.

Can someone can say me if the capacitor that i bought is ok (reference on the second pic) and if not were can i buy this cap?

i Know that in a lot of case it the D8228 Blacklight IC Chip and the L2220 Blacklight Filter but i think they are ok.

Thanks

tchang86 · 01-31-2015, 10:22

Someone can help me????

cal_guy · 02-02-2015, 02:12

Check or change D8228 and L2200 one by one.
Make sure C2200 is not shorted to ground on both sides.

tchang86 · 02-02-2015, 10:15

Thanks for your reply, How can i test the c2220? And the componment that i bought with the référence on the 2nd pic, is its ok for replace?

Regards

cal_guy · 02-04-2015, 02:50

c2220 don't need to replace. iPad will work without it.

tchang86 · 02-04-2015, 09:35

sorry but im sûre that the c2220 is important for blacklight, if it not in place, the blacklight dont Work.
I need to Know if the componment that i bought ( pic 2) is the same as the last pic (pic 3)

Ionel · 02-04-2015, 09:50

What knowledge do u have in electronics , as i see u have no clue about them .
That cap is only an anti parasite capaciter , and his role is to filter .
If u have an multimeter u can try to start measuring voltages , but first of all i think is better for u to start learning about components in ur ipad , and u wil understand how they all work .

tchang86 · 02-04-2015, 10:41

Ok so can u say me where i can buy this cap?
You said i can measure the voltage but of what? I cant measure voltage on cap???

Ionel · 02-05-2015, 00:26

If u check schematics there must be aroud 20 v on that cap , if there are not 20 v then the prob is from inverter .
U need good skills to repair that kind of problem , u can try to change diode and coil from light boost ic .

cal_guy · 02-05-2015, 04:14

Check or change D8228 and L2200 one by one.

tchang86 · 02-09-2015, 19:20

Hello,
So i replace the diode and it dont solve my problem, i checked the filter and there is a continuity so its ok too...
Can someone have an other idea?
Is someone know where i can buy the C2220?
I will post a pic but all is clear

Regards

tchang86 · 02-10-2015, 09:31

This is the pic

Regards

tchang86 · 02-10-2015, 15:19

Its an ipad2 wifi and The c8232 and the l2200 are not on motherbord, only a componment on the right of the d8228, and i dont know what is it. (3rd pic Brown componment)

tchang86 · 02-10-2015, 18:46

So for i Think i found the problem, the grey cap that i put on the third pic is not the good componment, i removed it and i made a jumper and the blacklight is working!!!!!
So i Think its the place for L2200 is anyone can confirm???

Regards

riclau7 · 08-26-2015, 07:20

Hi tchang86, I have the same problem that you have the schematics that I have for the ipad 2 is different that the actual ipad 2 that I have its missing the L2200 and it doesnt have the L8229 its exactly as your ipad 2 on the last picture. I have change the d8228 diode and still I have a backlight problem, what fix your problem and did you figure out which was the L2200 ?

Thank you

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01-31-2015, 10:22	#2 (permalink)
tchang86 Crazy Poster Join Date: Jun 2013 Posts: 50 Member: 1962081 Status: Offline Thanks Meter: 6	Someone can help me????

02-02-2015, 02:12	#3 (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 or change D8228 and L2200 one by one. Make sure C2200 is not shorted to ground on both sides.

02-02-2015, 10:15	#4 (permalink)
tchang86 Crazy Poster Join Date: Jun 2013 Posts: 50 Member: 1962081 Status: Offline Thanks Meter: 6	Thanks for your reply, How can i test the c2220? And the componment that i bought with the référence on the 2nd pic, is its ok for replace? Regards

02-04-2015, 02:50	#5 (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	c2220 don't need to replace. iPad will work without it.

02-04-2015, 09:50	#7 (permalink)
Ionel No Life Poster Join Date: Sep 2004 Location: Romania Age: 42 Posts: 1,598 Member: 81232 Status: Offline Thanks Meter: 196	What knowledge do u have in electronics , as i see u have no clue about them . That cap is only an anti parasite capaciter , and his role is to filter . If u have an multimeter u can try to start measuring voltages , but first of all i think is better for u to start learning about components in ur ipad , and u wil understand how they all work .

02-04-2015, 10:41	#8 (permalink)
tchang86 Crazy Poster Join Date: Jun 2013 Posts: 50 Member: 1962081 Status: Offline Thanks Meter: 6	Ok so can u say me where i can buy this cap? You said i can measure the voltage but of what? I cant measure voltage on cap???

02-05-2015, 00:26	#9 (permalink)
Ionel No Life Poster Join Date: Sep 2004 Location: Romania Age: 42 Posts: 1,598 Member: 81232 Status: Offline Thanks Meter: 196	If u check schematics there must be aroud 20 v on that cap , if there are not 20 v then the prob is from inverter . U need good skills to repair that kind of problem , u can try to change diode and coil from light boost ic .

02-05-2015, 04:14	#10 (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 or change D8228 and L2200 one by one.

02-09-2015, 19:20	#11 (permalink)
tchang86 Crazy Poster Join Date: Jun 2013 Posts: 50 Member: 1962081 Status: Offline Thanks Meter: 6	Hello, So i replace the diode and it dont solve my problem, i checked the filter and there is a continuity so its ok too... Can someone have an other idea? Is someone know where i can buy the C2220? I will post a pic but all is clear Regards

02-10-2015, 15:19	#13 (permalink)
tchang86 Crazy Poster Join Date: Jun 2013 Posts: 50 Member: 1962081 Status: Offline Thanks Meter: 6	Its an ipad2 wifi and The c8232 and the l2200 are not on motherbord, only a componment on the right of the d8228, and i dont know what is it. (3rd pic Brown componment)

02-10-2015, 18:46	#14 (permalink)
tchang86 Crazy Poster Join Date: Jun 2013 Posts: 50 Member: 1962081 Status: Offline Thanks Meter: 6	So for i Think i found the problem, the grey cap that i put on the third pic is not the good componment, i removed it and i made a jumper and the blacklight is working!!!!! So i Think its the place for L2200 is anyone can confirm??? Regards

08-26-2015, 07:20	#15 (permalink)
riclau7 Junior Member Join Date: Feb 2013 Posts: 6 Member: 1888242 Status: Offline Thanks Meter: 1	Hi tchang86, I have the same problem that you have the schematics that I have for the ipad 2 is different that the actual ipad 2 that I have its missing the L2200 and it doesnt have the L8229 its exactly as your ipad 2 on the last picture. I have change the d8228 diode and still I have a backlight problem, what fix your problem and did you figure out which was the L2200 ? Thank you