iPhone X not charging

[Nash99]

Hi everyone

I replaced a battery fpc connector on an iPhone X. The process went well and the connector is connected securely. However, the iPhone is not charging. It powers on, however it does not show the lightning bolt when plugged in and the battery percentage is at a constant 0%. It was charging fine before the replacement. It still, however, makes the charging sound when it is plugged in and connects to a computer fine. What should I do? What can be causing this?

Also, I have attached a picture, please can some help identity what these two components are and what purpose they serve. I have circled the two components in red.

Thank you!

[mon2]

Re: iPhone X not charging

hi These are 01005 sized parts.

See attached.

[Nash99]

Re: iPhone X not charging

Thank you so much. What do they do? How important are they?

Also, do you know why my iPhone will not charge? Can this parts play a part in that?

[mon2]

Re: iPhone X not charging

Are these parts missing from your logic board now ?

Do not have direct experience with this but they appear to be the thermal sensor for the battery to gauge the temp. Respectively, not sure if you can just solder in standard resistors or if special NTC resistors are required.

Would you know if the battery sits ontop of these parts ? That is the only way I can see the temp being measured of the battery is through contact by the NTC resistor.

If you can use standard SMD resistor, then Arrow has these and we may be able to ship them to you for free - itching to test our Arrow account that has free international shipping.

I think the 10k 01005 part is here (it is 5% but should be fine):

https://www.arrow.com/en/products/rk...er-electronics



The capacitor is here:

https://www.arrow.com/en/products/em...-w/taiyo-yuden

[Nash99]

Re: iPhone X not charging

Yes, they are missing. I think it blew out when I was replacing the connector.

No, the battery sits next to it. This parts are on the logic board. I have attached a picture with arrows.

I think I will need both but I hope it works.

Thank you Mon2

[mon2]

Re: iPhone X not charging

Send me a PM with your shipping address and will see if the webcart works on shipping to your region.

[mon2]

Re: iPhone X not charging

See here:

https://www.mobile1tech.info/2018/11...ntc-r3370.html

https://www.youtube.com/watch?v=54V_L2L2Dg0

Can you check if you see a temp sensor reading on your phone settings somewhere ?

What does it report with these parts missing ?

Also watch this video to see if it is the same issue as yours:

https://www.youtube.com/watch?v=ec7pjTLfFoA

[mon2]

Re: iPhone X not charging

Ok. A bit confused on the PHYSICAL SIZE of the R3370 & C3370 parts.

Are these truly the extremely tiny 01005 or are they 0402 EIC = 01005 EIA size ?

IEC 0402 case size (EIA 01005). I always get these confused but knowing Apple, they are using the ultra small 01005 EIC size. Will Google for some answers...

If they are rather common 0402 size then Arrow.com should have these.

Can anyone confirm ?

I will see if we have an IPHONE X logic board that is open. I know one of the guys here has one but he uses it all the time so cannot take it apart.

[Nash99]

Re: iPhone X not charging

I am not sure on the specific size but they are really really small. Smaller than an ant.

We just need to know what they are and try source the exact same one

[Nash99]

Re: iPhone X not charging

Can we not take those parts from the guy's board?

I also cannot find any temperature readings.

[Nash99]

Re: iPhone X not charging

Clean image of pads. Ignore the resistors as they are incorrect. This is my actual iPhone X after the connector replacement.

[mon2]

Re: iPhone X not charging

Check the diode readings against the attached.

Meter in diode mode.

RED lead to GROUND (shield is ok).

BLACK lead to each of the attached connector contacts.

Do your readings match ?

[Nash99]

Re: iPhone X not charging

Hi mon2

Where exactly do I put the black lead?

On what connector and pin?

If I did it correctly then I am getting 671 on the top connector and 0.01 on the bottom connector (battery connector)

[mon2]

Re: iPhone X not charging

hi. see attached.

1) RED probe on the metal shield (my red arrow). The screw post may also work if it is GROUND.

2) BLACK probe to each of the battery contacts as shown in the drawing (Picasso art). Remove the battery and check each contact with the meter in DIODE mode.

Each check should return a reading. Document and post here in the forum.

[Nash99]

Re: iPhone X not charging

Hi Mon2

Starting from the top left and then moving down:

Pin 1: 0

Pin 2: 0

Pin 3: 544

Pin 4: I cannot seem to get a reading

Pin 5: 279

Pin 6: 279

[mon2]

Re: iPhone X not charging

Hi. Sorry, does not follow the original map.

Let us apply the following # system:

1
2 3
4 5
6 7
8

J3200 is of interest.

Please post again.

[Nash99]

Re: iPhone X not charging

Hi Mon2, sorry about that.

The map is as follows:

0
0 549
0 281
(3) 281
0


(3) = I cannot seem to get a reading

[mon2]

Re: iPhone X not charging

Hi.

1) see attached. From the boardview file - believe that the pin that you are unable to measure in DIODE mode is pin # 3 ? This is pin # 2 in the schematic. This pin is very vital to the battery detection.

If this is correct, this is the I2C_SDA communication pin.

The host CPU will use what is called an I2C bus master to ping this I2C bus slave (battery) to interrogate the parameters of the battery. In the absence of this required communication channel, the host thinks there is no battery attached.

Summary - check the soldering again of the pin # 3 (as it is labelled on the Apple boardview file).

2) Aside from the above, there a few other issues that may cause the same symptom. I can send you a PM on the subject but you will have to access a paid service that details the issues and repairs that may be the root cause. For sure, confirm that the I2C_SDA line is reaching the mosfet Q3200 for the level translator.

Confirm if it is the I2C_SDA pin that is unable to show a reading with the DIODE mode. This pin MUST return a value about 500-650 otherwise it is not connected to the MOSFET (Drain) @ Q3200.

[Nash99]

Re: iPhone X not charging

Hi Mon2

Thank you so much.

That makes sense. I think this pin may not be connected. I will need to check the connection.

I will ask my friend to maybe desolder and then resolder the connector.

I will keep you updated.

[Nash99]

Re: iPhone X not charging

Hi Mon2

Apologies for the delay.

I removed the battery connector and tested pin that was the problem. I still do not get any reading on that pin. What could be causing this?