anyway I will change the chip. Next update in about 2 weeks.
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How was this current draw measured? Are you using a lab power supply for the battery function? What voltage did you apply if using a power supply?Current draw is 0,5A@5V when battery is connected
Remove all power -> measure the resistance (not diode mode) to ground of the battery contacts. Someone is consuming this immediate current of 500mA since it is a spike. Respectively, is your power supply being current limited to the max of 500mA (0.5A) ?Comment
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I changed the chip without any result. But I found this. The 0,5A current goes to U0702. And here is the strange thing. On the C1819 is a short. You can measure it, but when voltage inject short is gone. Found out that every time I plug in the charger there is a short and after a time the short is gone. So I found out that the short is produced by Q7772. Unsoldered Q7772 short is gone and current draw and charging is much better but when plug in charger iPad freeze and goes black. Return to life unplug and plug in battery. Found that this mosfet can be found on iPhone X mainboard, actually not have. Will buy a donor and give a try. Maybe U7700 is also faulty What do you think?Comment
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You have first change the PMIC, it's U8100?
I don't think it is the right way to troubleshoot this board, may be you're wasting your time.Comment
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I tried searching the forum for whether this has been uploaded already, but couldn't find them (as a collection).
Here's a dump of a bunch of iPads, I've split into 2 archives to get under file limit
IPAD COLLECTION 1
+---iPad mini1 820-3400(A1432) 820-3243(A1454?A1455)
+---iPad mini2 820-3683(A1489) 820-3684(A1490?A1491)
+---iPad mini3 820-00008(A1599) 820-00002(A1600)
+---iPad mini4 820-00180(A1538) 820-00177(A1550)
+---iPad mini5 820-01591(A2133) 820-01495(A2124?A2125?A2126)
+---iPad Pro 12.9-4-820-01797(A2229) 820-01798(A2069?A2232?A2233)... -
The charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.
Windows also shows ''Plugged in'' when charger is not connected.
This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
If I let battery run out and say it has 3% Windows will... -
I have a strange problem with my iPad Pro 12.9 4Gen / A2229. When I start the device, it stays on the Apple logo, but when I heat the back of the device with a hair dryer, the device boots, but this time there is an interesting problem. The iPad is charging, but there is no USB data on the computer. The USB charging port has been changed and the chips seem normal, but I have given it to 2 different Apple services in Latvia, but the repair could not be done. Is there anyone who can help with this? Can someone support the repair by sending only the motherboard within Europe? Thank you. -
Hello everyone.
This is my development machine. I've been using it since two years and half without any problem except sometimes it wouldn't wake up from sleep.
Lately the issue became more frequent and powering it up would take few seconds to show the POST screen.
Then the computer refuses to power on at all. Now only the caps lock button flashes 7 times then stops. The charging light is always on whenever a power source is connected (battery or charger).
I tried long pressing on the power button, after several seconds it would go off then when the button is released... -
Hey folks, I have this iPad Pro 12,9" 4Gen A2232 here with no charging issue. The main fault was a crossed pins / faulty USB charging port due a bad cable.
So I started to replace this parts:
- replaced usb-c port -> no result
- replaced battery -> no result
- replaced usb-c chip CD3217B12A -> no result
- replaced 343S00326 -> no result
- replaced 343S00327 -> no result
- replaced 343S00328 -> no result
I have no more ideas for this issue. There is no short on the whole board, and the iPad is working fine...
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