iPad 3 Model A1430 fake charging - Page 2 - GSM-Forum

LetItFlowTech · 07-04-2016, 18:03

Double checked my jumper and it's good. Remembered Q8104 and I am getting the same results - 4.94v

I ran resistance test on the caps. C8165 starts at 12Mohms but immediately starts draining and goes down to 233kOhms and continues to deplete. Now for Q8101, there is no component in that location and according to the schematic is it labeled NOSTUFF. I did however test the two caps next to it since they are together. C8170 started at 9.04Mohm then starts to drain down to 233Kohms and continues to drain more and the same results for C8171.

So how do these values look to you?

This is post number 9. So in about 10 minutes I will post number and hopefully I can include a photo on this one.

LetItFlowTech · 07-04-2016, 18:27

Picture of my jumper setup.

LetItFlowTech · 07-04-2016, 18:44

jimchu316 · 07-06-2016, 01:10

Quote:

Originally Posted by phonescreen

I think it might be bad, it is recommended to handle the sale of Apple to get it.

This is our job which to repair the faulty apple drvices, no apple's job .....

jimchu316 · 07-06-2016, 01:11

Quote:

Originally Posted by LetItFlowTech

Perfect...............

LetItFlowTech · 07-06-2016, 03:01

Double checked my jumper and it's good. Re-measured Q8104 and I am getting the same results - 4.94v while the two points are jumped.

I ran resistance test on the caps. C8165 starts at 12Mohms but immediately starts draining and goes down to 233kOhms and continues to deplete. Now for Q8101, there is no component in that location and according to the schematic is it labeled NOSTUFF. I did however test the two caps next to it since they are together. C8170 started at 9.04Mohm then starts to drain down to 233Kohms and continues to drain more and the same results for C8171.

So how do these cap values look to you?

Now seeing how after jumping those two points and re-measuring Q8104 and getting voltage readings on pins 5, 6 7 and 8 while those two points were jumped, are we coming to the conclusion that Q8104 is faulty here and needs to be replaced JimChu316?

jimchu316 · 07-06-2016, 06:06

Q8104 only 5 pin, pin 1-2-3 is Vcc_MAN (4.2V / Vbat) pin 5 is VBAT (3.7-4.2V)

IF Q8104 FAULTY, SHORT PIN 1-2-3 TO 5.

SO EARY JOB.

LetItFlowTech · 07-06-2016, 06:21

before shorting pins 1,2 and 3 to pin 5, do I remove the jumpers from previous test? How do you SHORT pin 1, 2, and 3 to pin 5, am I soldering 3 individual small wires from Q8104 pin 1, 2 and 3 and solder them to pin 5? or do I solder wire on pin 1 to pin 2, then solder wire from pin 2 to pin 3, then solder wire from pin 3 to pin 5? After I short the pins correctly, do I take voltage reading across pin 5 on the Q8104 chip ?

jimchu316 · 07-06-2016, 13:26

Quote:

Originally Posted by LetItFlowTech

before shorting pins 1,2 and 3 to pin 5, do I remove the jumpers from previous test? How do you SHORT pin 1, 2, and 3 to pin 5, am I soldering 3 individual small wires from Q8104 pin 1, 2 and 3 and solder them to pin 5? or do I solder wire on pin 1 to pin 2, then solder wire from pin 2 to pin 3, then solder wire from pin 3 to pin 5? After I short the pins correctly, do I take voltage reading across pin 5 on the Q8104 chip ?

only need soldering pin 1 to pin 5

They are connected pin 1-2-3 on PCB

LetItFlowTech · 07-07-2016, 03:16

What is the secret to soldering jumper wires to Q8104 from pin 1 to Pin 5. I can't get my wires to stay. They keep falling off. I have my soldering iron set at 780 degrees.

LetItFlowTech · 07-07-2016, 03:17

What is the secret to soldering jumper wires to Q8104 from pin 1 to Pin 5. I can't get my wires to stay. They keep falling off. I have my soldering iron set at 780 degrees.

LetItFlowTech · 07-07-2016, 03:20

What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

LetItFlowTech · 07-07-2016, 03:21

What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

LetItFlowTech · 07-07-2016, 03:21

What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

LetItFlowTech · 07-07-2016, 03:22

What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

07-04-2016, 18:27	#17 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	Picture of my jumper setup. Last edited by LetItFlowTech; 07-04-2016 at 18:35.

07-04-2016, 18:03	#16 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	Double checked my jumper and it's good. Remembered Q8104 and I am getting the same results - 4.94v I ran resistance test on the caps. C8165 starts at 12Mohms but immediately starts draining and goes down to 233kOhms and continues to deplete. Now for Q8101, there is no component in that location and according to the schematic is it labeled NOSTUFF. I did however test the two caps next to it since they are together. C8170 started at 9.04Mohm then starts to drain down to 233Kohms and continues to drain more and the same results for C8171. So how do these values look to you? This is post number 9. So in about 10 minutes I will post number and hopefully I can include a photo on this one.

07-04-2016, 18:44	#18 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2

07-06-2016, 03:01	#21 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	Double checked my jumper and it's good. Re-measured Q8104 and I am getting the same results - 4.94v while the two points are jumped. I ran resistance test on the caps. C8165 starts at 12Mohms but immediately starts draining and goes down to 233kOhms and continues to deplete. Now for Q8101, there is no component in that location and according to the schematic is it labeled NOSTUFF. I did however test the two caps next to it since they are together. C8170 started at 9.04Mohm then starts to drain down to 233Kohms and continues to drain more and the same results for C8171. So how do these cap values look to you? Now seeing how after jumping those two points and re-measuring Q8104 and getting voltage readings on pins 5, 6 7 and 8 while those two points were jumped, are we coming to the conclusion that Q8104 is faulty here and needs to be replaced JimChu316?

07-06-2016, 06:06	#22 (permalink)
jimchu316 Freak Poster Join Date: Sep 2014 Location: CN & NZ Posts: 388 Member: 2252373 Status: Offline Thanks Meter: 400	Q8104 only 5 pin, pin 1-2-3 is Vcc_MAN (4.2V / Vbat) pin 5 is VBAT (3.7-4.2V) IF Q8104 FAULTY, SHORT PIN 1-2-3 TO 5. SO EARY JOB.

07-06-2016, 06:21	#23 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	before shorting pins 1,2 and 3 to pin 5, do I remove the jumpers from previous test? How do you SHORT pin 1, 2, and 3 to pin 5, am I soldering 3 individual small wires from Q8104 pin 1, 2 and 3 and solder them to pin 5? or do I solder wire on pin 1 to pin 2, then solder wire from pin 2 to pin 3, then solder wire from pin 3 to pin 5? After I short the pins correctly, do I take voltage reading across pin 5 on the Q8104 chip ?

07-07-2016, 03:16	#25 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	What is the secret to soldering jumper wires to Q8104 from pin 1 to Pin 5. I can't get my wires to stay. They keep falling off. I have my soldering iron set at 780 degrees.

07-07-2016, 03:17	#26 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	What is the secret to soldering jumper wires to Q8104 from pin 1 to Pin 5. I can't get my wires to stay. They keep falling off. I have my soldering iron set at 780 degrees.

07-07-2016, 03:20	#27 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

07-07-2016, 03:21	#28 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

07-07-2016, 03:21	#29 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?

07-07-2016, 03:22	#30 (permalink)
LetItFlowTech Junior Member Join Date: Jun 2016 Location: Illinois Posts: 37 Member: 2591312 Status: Offline Thanks Meter: 2	What is the secret to adding jumper wires from pin 1 to Pin 5 on Q8104. I can not get my wires to stick. They keep falling off the pads. I have my soldering iron set at 780 degrees. What am I doing wrong?