Hi guys,
I currently trying to figure out why the laptop of my friend did not charge.
It is a Acer AN515-42 (Ryzen 5 2500U), I manage to make it works on AC and battery but no charging.
At first it was not working on Battery, I discovered that PQ201 was knocked off and replace it => work on battery precharged on another computer.
I also checked the small resistors between PQ312 and PQ201 and even if they are ugly values are OK.
My issue, when I plug the charger computer off, it drains 0.25A during few seconds with amber light on (charging) then amber light blinks and 0.00A drain.
I measured the mosfet PQ305, PQ306 and PQ312 and did not find any short (from my perspective).
On infrared camera during the 0.25A consumption I can see PQ305 getting hot, PU301 and PD301 also.
Voltage of the battery was 15.79V and when it "charges" voltage between PQ305 and PQ306 is 15.90V (once charging stops the battery voltage remain at 15.79V).
I checked the 100 Resistor and read 10Ohms => OK
I checked the 0 Resistor and read 0.1 Ohms => OK
I' am a bit confused to determine if the intersil chip 88739A is good (seems to).
What can I check, I already tried to replace the PU301 but the one from the doner board was out of order (to reaction at all, so I swapped back with the old one (and computer works but did not charge).
The battery works (drain and charge on another acer computer and yes it is the same part number AC14B8K.
Any help or advice will be highly appreciated.
Thanks guys for any help you may provide to me.
I currently trying to figure out why the laptop of my friend did not charge.
It is a Acer AN515-42 (Ryzen 5 2500U), I manage to make it works on AC and battery but no charging.
At first it was not working on Battery, I discovered that PQ201 was knocked off and replace it => work on battery precharged on another computer.
I also checked the small resistors between PQ312 and PQ201 and even if they are ugly values are OK.
My issue, when I plug the charger computer off, it drains 0.25A during few seconds with amber light on (charging) then amber light blinks and 0.00A drain.
I measured the mosfet PQ305, PQ306 and PQ312 and did not find any short (from my perspective).
On infrared camera during the 0.25A consumption I can see PQ305 getting hot, PU301 and PD301 also.
Voltage of the battery was 15.79V and when it "charges" voltage between PQ305 and PQ306 is 15.90V (once charging stops the battery voltage remain at 15.79V).
I checked the 100 Resistor and read 10Ohms => OK
I checked the 0 Resistor and read 0.1 Ohms => OK
I' am a bit confused to determine if the intersil chip 88739A is good (seems to).
What can I check, I already tried to replace the PU301 but the one from the doner board was out of order (to reaction at all, so I swapped back with the old one (and computer works but did not charge).
The battery works (drain and charge on another acer computer and yes it is the same part number AC14B8K.
Any help or advice will be highly appreciated.
Thanks guys for any help you may provide to me.
Attached Files