ct470 nm-a931
rev 2.0
2016-10-28
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this schematic for t470 ? because can't find it on motherboardRemove all power. Remove the battery. Meter in resistance mode.
Measure the resistance across the mosfet pins to check if they are leaking.
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)
Post each measurement. Start with checking the battery mosfet @ PQ103. If the resistance is low, then the mosfet may be defective.
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Remove all power. Remove the battery. Meter in resistance mode.
Measure the resistance across the mosfet pins to check if they are leaking.
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)
Post each measurement. Start with checking the battery mosfet @ PQ103. If the resistance is low, then the mosfet may be defective.
Leave a comment:
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Can you test with another battery if available? Does Windows report the battery gauge and the battery gauge climbs over time?Leave a comment:
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t470 have fake charging
i have t470 have fake charging
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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 an RC radio handset(Taranis QX7) which doesn't have internal battery charger which means I had to remove the battery every time I needed to charge it.
So to improve it, I added a 15W USB-C charger board(link) inside and soldered it to the same connector on the PCB where the battery plugs into, great, now I can simply charge it with a USB-C cable.
but the problem I found is that after the radio sat for two weeks without being used the 2S 18650 battery that I'm using was at 4.2V!
So the battery is backfeeding the charger and being drained.
How can I prevent... -
I have a macboook air a1466 that stopped charging the battery.
BAT PINS: with or without ADAPTER IN
1- GND
2- GND
3- GND
4-0V sense pin
5-3.42V
6-3.42V
7- 8.4V
8- 8.4V
9- 8.4V
AC Adapter plugged in: after a lot of of hours some times start charging
No BAT Connected- Green to Orange
AC Adapter plugged in: BAT Connected- no light
The strange thing, when I tried a mac charger usb-c with usb-c to macsafe 2 adapter works normally and charging.
Any ideas what’s wrong please?...08-05-2025, 03:43 AM -
Hy guys, i have this lenovo TB-X605F with charging problem, the tablet is fake charging, i have replaced the charging connector twice, it only draws 0.40 Amps when pluging the cable for the first time then it stops drawing any Amps but the tablet keeps showing the charging image at 0% as long as i keep it connected. I have no voltage at the battery connector with the cable pluged, but i have 5 volts after usb connector on some testing points on the board.
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Hi guys.I bought Macbook Pro mid 2014 15 inch model which did not came with charger.
I got new charger but judging by the specs seems it is fake one.Sadly I live in Bosnia and genuine charger is rare to find.
what to do?Should I use the fake one?
Will it damage the macbook?...
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