Re: Charging Issue on Dell G3 3579 (LA-F611P)
Or could the problem be with the PUB02 I replaced at first to get the unit switching on again?
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
Could it be possible that the ISL95522 chip is the problem? Should I order a replacement?Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
My apologies, that is a typo. PRB07 tested 149k ohm on and off the board.
I had a look at the schematic again now and I can see according to the schematic PRB07 should be 150k ohm on the ISL95522. The schematic also only shows PRB05 on ISL9538 and there is no indication that PRB05 is populated on ISL95522.
Here is a snip of schematic, I marked my findings in red:...Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
I don't think any SMDs were mixed, my soldering skills is fairly good. I also found it strange that PRB07 tested wrong and that PRB05 was missing. I am not so good with understanding schematics yet tho, so at this point I am assuming its some configuration thing with the board model?
Here is a photo of ISL95522 (PUB01)...Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
Hi Sephir0th, thanks for asking. The charging IC used on this board is the ISL95522Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
Value for PRB07 on schematic is 100k ohm, tested it out of circuit and still got 149k ohm. There is no resistor on PRB05, but pin 1 tested 20v and pin 2 tested 0vLeave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
So I checked pin19 voltage again - still 0 volts even with battery plugged in.
Pin 16 also still showing 2.2 volts, PRB07 is populated and tested 149ohm.Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
No battery is unplugged.Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
Hi guys, sorry for only replying now, have been busy.
I tested PRB02, PRB03, PRB32 and PRB36 and found this:
PRB02: 0 ohm
PRB03: 2.2 ohm
PRB32: 2.2 ohm
PRB36: 0 ohm
I then replaced PRB02 with a 2.2 ohm resistor as per the schematic, I hoped it would solve the problem - but unit is still discharging even when plugged in.
Here is the measurements of PUB01 in voltage with charger plugged in:
1. 0
2. 0
3. 0
4. 5
5. 0,6
6. -0,2...Leave a comment:
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Re: Charging Issue on Dell G3 3579 (LA-F611P)
Hi Vesko356, Thanks for the assistance.
Hi Rookieme, I have checked those mosfets for shorts - all tested fine. This model does not have a docking port no.Leave a comment:
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Charging Issue on Dell G3 3579 (LA-F611P)
Hi guys,
I am working on a Dell G3 3579, with motherboard LA-F611P that is not charging.
Unit was dead with blown PU01 and I replaced PU01 along with PUB02 to get the unit going. After testing I found the unit is not charging.
I have seen this on the Dell G3 3579 on about 5 different units, but I have never been able to fix it
So I can see in the bios its not a charger detection issue, as it is detecting my 130w charger fine, but even when plugged in the battery will show its discharging. Unit works fine from battery and from...Last edited by Vesko356; 08-02-2023, 04:01 AM. Reason: Attached schematic and BV removed and replaced with link. -
Re: New Members - please post your introductions here
Hi all,
I am a laptop repair technician from Cape Town, South Africa. Here to learn more about motherboard repairs =]
My name is KoosLeave a comment:
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