So If no new idea, I will solder back the component and maybe check for capacitor issue.
I have changed the ic chip, tested the mosfet separatly.
The remaining is may-be to swap the capacitor with another one....
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PQ312 removed:
4MOhms between drain and source
OL between Gate and drain
OL between Gate and source
On the motherboard
Gate drain 4Mohms
Gate source 4.47Mohms
Drain source 5.27Mohms
So motherboard good and mosfet also
I have well cleaned with IPA both before measurement and short my probe each time to read the zero
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so I did it, checking the values everything unplugged and cold:
PQ305
LX_CHG -> UG_CHG => 19.59kOhms
LX_CHG -> +19VB_CHG => 1.6MOhms
UG_CHG -> +19VB_CHG => 2.7MOhms
PQ306
LX_CHG -> GND => 2.8MOhms
LG_CHG -> GND => 100kOhms
LG_CHG -> LX_CHG => 2MOhms
Still 0.000V on LG_CHG... when I plug the battery and adapter.
Still blinking amber right away... 🤔
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Battery is AC14B8K genuine acer model 4cells 15.2V (max charging is 17.4V 4×4.2V = 16.8V so to my point of view it is OK).
Yes, I change the PQ306, but maybe I did not solder it properly. I should check that next evening.
I don't remember to have checked any brigde between gate and drain nor betwen drain and source. (not good).
On picture solder not seems to be so bad but sometime the mess is hidden under....
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Really challenging, I was hoping to be Shiva.
So in diode mode on pin #2 of the IC (ACIN) and pin [NODE="110"]What to test with???[/NODE] of the EC chip I read 0.9Ohms (and it bip).
on pin #3 of the IC (N16860647) and pin [NODE="78"]Abit BP6 recapping & stability tips [UPDATED][/NODE] of the EC chip I read 1Ohm (and it bip also).
So the trace seems to be OK.
Regarding the +RTCVCC the value is strange, I have 2.77V when I check on the coin cell I have 3.08V and it drop after DC1 (3.08V on pin #2 and only 2.77V on pin #1). I found the voltage...
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Yes of course, all measurement where done without any power on the board, (no battery and no adapter).
So I have checked but in front of pin#3 en pin #4 there is no resistance (PR316 and PR314 not polated (circuit is continuous).
On pin #4 PR316 is linked to the PR202 (100K according to pdf and I read 100.2kOhms with the multimeter)
On pin #3 PR314 is linked to the PR201 (100K according to pdf and I read 100.5kOhms with the multimeter)
I have also check R1577 and R1574 both are close to the 2.2kOhms presented => if I read between R1577 and R1577 I found 4.38kOhms...
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Hi, Unfortunately i don't know any friendly priest (and I shoul ask for what type of action (1a exorcism or 1b funeral)).
So I tried the option 2 (Computer was OFF during the measurement and with batterie and adapter plugged in).
I'm confuse by the reading of NXXXXXX and PROG_CHG and COMP_CHG reading at 0.000V (I may try to do it on computer running).
01 ACIN_CHG 2.216V
02 ACIN 3.144V
03 N16860647 3.286V
04 N16860655 3.288V
05 N16860695 0.000V
06 AMON_ISL95520 0.000V
07 N46981745 ...
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PU301 replaced by a brand new one tested on another motherboard PQ201 replaced by a new one => start with battery, start with adapter but still no charging.
Change both of the mosfet => No change, not charging.
I have to circle back to the intial measurment to check if I did not miss something somewhere....
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Small update, I use a shnt between pin #3 and pin #1
It works perfectly on my AN515-52 which have the same issue as the A315-41G => power on battery, on Adapter and charging properly.
It works not perfectly on my A315-41G => power on battery, on adapter but still no charging.
Battery used is the same for both motherboard.
I have tried to downgrade BIOS now the battery is recognized properly, v1.18 to v1.17 then back again to v1.18 (touchpad works again, keyboard is strange (but I assume that formating is different as when I look to the touch they are not at...
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Thank you again mon2, Indeed much more easy to find on local reseller. Just for my understanding, I understood that PQ201 is somehow an heritage from the board including a switch preventing battery usage when the bottom cover is removed (not populated on my boards).
So If I solder a jumping wire between the pin #3 and pin #1, I should have the same behavior than for an activated mosfet (is there any risk do you think ?).
Of course I have to ckeck if the rest of the circuit is all right.
Without PQ201 the boards works but of course battery is not activated (detected but not working)....
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Hi Jayanta, I just finished a repair on AN515-52, and HDMI was unresponsive until I install the Nvidia graphic driver, without that no picture at all.
Just to check, have you any yellow mark under device manager for the 1650ti nvidia graphic part ?
We need to check that all software is working as it should. And try to reinstall the driver just in case that some update may have triggered the issue before touching the hardware more.
I saw that between intel and amd platform the way hdmi is managed are quite different!...
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Based on my experience with a AN515-52, the hdmi did not work until a proper LVDS is connected, and picture is working on HDMI only when windows is reached.
Did you remove the battery and adapter first prior to any working (like on LVDS connector ?
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I'm sorry the laptop in which I can charge the battery is quite different. Only think I can notice is when I plug only the battery.
It is the same battery i use for both, withou adapter:
When I plug the battery in the laptop that can charge, right away the battery is activated (I have 15.2V).
When I plug the battery in the laptop that cannot charge, the battery is not activated (I have 150mV).
Once the adapter is plugged in.
In the laptop that can charge, I have 1.35A immediately (and voltage increase while charging current slowly decrease).
In the laptop tha...
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Ok I think I understand your point, I have measured before the Vin at 19.3V and checked the PR306 resistor which is 0.510MOhms (normally it should be a 499kOhms at 1% so the resistor is slightly Off tolerances).
I will try to make the measurement on the laptop working (but it is not the same board I have to check if the battery management is similar or not).
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3292285}[/ATTACH]Ok I think I understand your point, I have measured...
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