Re: asus gl703gs detecting short
Resistance of PR8913 ? 62 kohm
Resistance of PR8914 ? 44 kohm
PR8913, pin # 1. - 0 vol
prow
Member
Last Activity: 07-08-2021, 12:03 AM
Joined: 07-15-2020
Location: zagreb
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Re: asus gl703gs detecting short
1. a/c dock in 19,6 v
2. Ilim 0,1 v. sometimes 0,3v dropping to 0,2v
3. acdet 2,68 v
4. acok 5,92 vLeave a comment:
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Re: asus gl703gs detecting short
Hi,
I did remove battery before.
I will try with lab power supply, but as i mentioned when i plug the adapter on first mosfet on drain i have 19,3V. Source is a problem...its dropping 9v, 6v, 3v, 0v....on both power mosfets. To my understanding that means that power main controller is closing source by cutting gate....?
I did replace both mosfets but its the same.Last edited by prow; 07-07-2021, 05:07 AM.Leave a comment:
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asus gl703gs detecting short
I have this motherboard from the title, there is no schematic or boardview.
When i apply the adapter nothing happens, no lights, only little buzzing noise but adapter is not going to protection mode. Later i check and on first power mosfet there is 19,3 v but later nothing (it is not opening)....Then i check again and every time i apply the adapter it will open the second power mosfet but voltage is just droping...9v...6v...3v...0v
So, i believe the power main controller is closing power mosfets and going to protection mode because ther is a short somewhere in lower power lines?...Last edited by prow; 07-07-2021, 02:08 AM. -
signal measure points, yellow numbers?
Hi to all, maybe a stupid question but i am new here and tried to learn regarding motherboard repars..
So, the question is regarding repair guides for laptops. For instance i attached pdf regarding asus g752vl repair. I did understand most of the guide but what puzzles me is section Signal Measure Points (last two pages). I understand that those are signals that needs to be checked..and with red number it is described what is a sequence in time.... what singal comes first and what last. But what are those yellow numbers? for instance AC_BAT_SYS number is 436? is that resistence in ohm?... -
Re: Noob ohm low question
Update.... so i checked on the motherboard and i have 0.01 ohm (10m Ohm) current sense resistor and i have drop in voltage across ressistor by 0.01 V. So if i use ohm calculator the current is 1 A. Is this correct?Leave a comment:
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Re: Noob ohm low question
All is clear now
thank you all very much!
Leave a comment:
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Re: Noob ohm low question
I think i understand...if i check voltage on "current sense resistor" of lets say 0.05 ohm before and after...i can calculate the current?
hmm but how? lets say the difference is 0.2 V?Leave a comment:
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Re: Noob ohm low question
I understand. Is there any way i can measure resistance while laptop is on? without risking destroying equipment...Leave a comment:
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Re: Noob ohm low question
Thank you...one more question...is it safe to measure resistence with multimeter while power adapter connected?Leave a comment:
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Re: Noob ohm low question
So, you are saying when checking with multimeter (no power adapter) the resistence is 143 kOhm, but when i apply 19V adapter and because there are many active devices that resistence will not be 143 kOhm but much lower?Leave a comment:
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Re: Noob ohm low question
thx for answer...but probably i was not clear...What i was saying is if i have 19.2 V and 143 Kohm resistence i should have somewhere near 0,13 mAmps according to the ohm low? A=V/R = 19,2 V/143 kOhm ? But that doesnt seem right?
Or i am figured something wrong?Leave a comment:
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Noob ohm low question
Hi,
I have a very basic question...regarding ohm low on motherboards. So, lets say i have laptop and 19,2v power adapter and on AC main net on the board i have 143 Kohm resistence to the ground. When i plug adapter i can check with multimeter and i have 19,2 V on ac main net. If i am not calculating something wrong i should have 0,13 mAmps ? But that doesnt seem right? Or?
ThxLast edited by prow; 07-15-2020, 03:03 AM. -
Re: New Members - please post your introductions here
hi to ali, i am from Croatia..and wont to learn greetings!
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