iPhone 6 water damage dead

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iPhone 6

Repair information and guides for the iPhone 6 that was released on September 19, 2014. Model Numbers: A1549, A1586, and A1589

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man_fry @manfrysurf

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Posted: Mar 18, 2017

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iPhone 6 water damage dead

Hello to all !!

My iphone is dropped into fresh water and now no longer lights.

I removed all the shield of the motherboard and made cleaning with isopropyl alcohol.

Looking under the microscope, I found this component oxide (resistance) L1503 which is part of the VCC MAIN.

Could this be the problem?

Before removing it I would be sure

thank you

MINHO hello, thanks for the quick response .perhaps now everything is clear, I believe the 80% that the short circuit is located in backlight line. I noticed that the tooth of the LCD connector and the filter (exactly the first on the right, connected to the FL2024 filter are burned). After the diode D1501 seems broken, also it burned this .Spero think that's why it does not turn and is not detected by iTunes My iPhone

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Could this be the problem, Che does not turn on the backlight ???

thanks

Mar 19, 2017 by man_fry

I measured with test 200 kilohom, is that the capacitor C1505 -C1530 -C1531 and give me 0.00 (so I think in the short-circuit line Backlight)

Could this be the problem, Che does not turn on the backlight????

To switch it on what should I do?

Mar 19, 2017 by man_fry

You should comment on the answer, it is easier to follow...see below.

Mar 19, 2017 by Minho

I lifted the D1501, but still is the Short Circuit ..

I misurate the voltage of C1552-C1597 capacitors and 3.7 Volts, then exclude both the Coil L1503.

Right?[image|1055536]

Mar 21, 2017 by man_fry

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Minho @refectio

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Posted: Mar 18, 2017

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That is the backlight coil. It is pretty hard to damage because it is just a wire, coiled up. Backlight issues are usually more in the ferrite bead FL2024 (filter) area and the diode D1501 (right next to coil). You need to carefully probe the entire backlight circuit to see what is causing the problem.

Of course, you could just shotgun it and change everything but that doesn't help you understand what causes what.

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Could this be the problem, Che does not turn on the backlight

Mar 19, 2017 by man_fry

If you are measuring 0 Ohms on those caps, then that line is shorted and your backlight circuit will not work.

There are 5 caps on that line (C1505/C1513/C1530/C1531/C2017). One (or more) of those could be pulling the line down. You will need to remove them one at a time until the short disappears and then replace the defective cap.

It could also be a bad backlight on the display (damaged by the water) that caused the line to short so you will want to take that into account as well.

Mar 19, 2017 by Minho

MINHO hello, thanks for the quick response .perhaps now everything is clear, I believe the 80% that the short circuit is located in backlight line. I noticed that the tooth of the LCD connector and the filter (exactly the first on the right, connected to the FL2024 filter are burned). After the diode D1501 seems broken, also it burned this .Spero think that's why it does not turn and is not detected by iTunes My iPhone

Mar 20, 2017 by man_fry

Yes, the shorted backlight circuit is pulling down VCC_MAIN. You will need to change all of the defective components (filter, diode, connector) and possibly the coil as the damage to the circuit seems extensive.

You will also want to probe around the PMIC to see if there is any other damage to voltage rails before investing too much time on this. At a certain point, it may not be possible nor cost effective to fix the phone (unless you are doing a data recovery). Before doing a backlight repair, you need to understand if that is the only issue with the phone.

Mar 20, 2017 by Minho

I lifted the D1501, but still is the Short Circuit ..

I misurate the voltage of C1552-C1597 capacitors and 3.7 Volts, then exclude both the Coil L1503.

Right?

Mar 21, 2017 by man_fry

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Could this be the problem, Che does not turn on the backlight ???

thanks — man_fry
I measured with test 200 kilohom, is that the capacitor C1505 -C1530 -C1531 and give me 0.00 (so I think in the short-circuit line Backlight)

Could this be the problem, Che does not turn on the backlight????

To switch it on what should I do? — man_fry
You should comment on the answer, it is easier to follow...see below. — Minho
I lifted the D1501, but still is the Short Circuit ..

I misurate the voltage of C1552-C1597 capacitors and 3.7 Volts, then exclude both the Coil L1503.

Right?[image|1055536] — man_fry
Could this be the problem, Che does not turn on the backlight — man_fry
If you are measuring 0 Ohms on those caps, then that line is shorted and your backlight circuit will not work.

There are 5 caps on that line (C1505/C1513/C1530/C1531/C2017). One (or more) of those could be pulling the line down. You will need to remove them one at a time until the short disappears and then replace the defective cap.

It could also be a bad backlight on the display (damaged by the water) that caused the line to short so you will want to take that into account as well. — Minho
MINHO hello, thanks for the quick response .perhaps now everything is clear, I believe the 80% that the short circuit is located in backlight line. I noticed that the tooth of the LCD connector and the filter (exactly the first on the right, connected to the FL2024 filter are burned). After the diode D1501 seems broken, also it burned this .Spero think that's why it does not turn and is not detected by iTunes My iPhone — man_fry
Yes, the shorted backlight circuit is pulling down VCC_MAIN. You will need to change all of the defective components (filter, diode, connector) and possibly the coil as the damage to the circuit seems extensive.

You will also want to probe around the PMIC to see if there is any other damage to voltage rails before investing too much time on this. At a certain point, it may not be possible nor cost effective to fix the phone (unless you are doing a data recovery). Before doing a backlight repair, you need to understand if that is the only issue with the phone. — Minho
I lifted the D1501, but still is the Short Circuit ..

I misurate the voltage of C1552-C1597 capacitors and 3.7 Volts, then exclude both the Coil L1503.

Right? — man_fry

iPhone 6

iPhone 6 water damage dead

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