Voltage divider calculation at VR9 and VR12 will give 2.79v, However, this voltage will only come if +VA_AIR signal comes to voltage divider at PR14 and PR13. This signal goes to the base of the NPN transitor which switches on to shift the ground to the gate of PO4. This will pull the 10v from the voltage divider at PR 23 AND PR21 to ground and prevent the transistor PQ4 from switching on and pulling the 2.79v from the voltage divider VR9 and VR12 to ground.
hi sir good morning , here i want to talk about to get ACDETrequired voltage . the required voltage of ACDET is 2.6v case (1) if we get the PWRSRC (19v) only without having +VA_AIR (0v) then PQ4 will turn on and ground will go up . and the ACDET circuit will work different NOW R1 is pr9 and (pr12+pr8) will become parallel circuit and it is R2 here the ACDET voltage will be lower(1.5v) than required voltage ..so charging ic doesn't meet its requirement and it is not going to work . case (2) if we get +VA_AIR (18 to 19v) then PQ2 will turn on and also the PWRSRC will be grounded and PQ4 will not turn on .... now the circuit of ACDET will work fine and we get required voltage (2.6v) of ACDDET and circuit will fine . sorry sir for any mistake...🙏
Sir I asked how much the price for a video that you put on youtube (how to solve DRAMRST Missing ....) they answered me that I have to buy the whole course. I think that it has become a business and no question of spreading knowledge. it's ridiculous.
It's not ridiculous... of course it's business we are doing business apart from spreading free knowledge. And proudly doing that because that's our bread and butter.
I am facing same problem in haier laptop looking like this board. I have found "HWMONITOR" and HWMONITOR1 on I.O thermal protect it was 2.7V on both pins whearas it should be 1.2 and 1.8V but unfortunatey after much struggle not able to find I.O thermal protect area.
pleass sir i would like to inquire from you,can MISSING OF SMBUS (SCL&SDA) COMMINICATION CAUSE BOTH AC FET MOSFETS AND BATTERY MOSFETS TO DONOT SWITCH ESPECIALLY IN NVDC BUCK-BOOST CHARGER WHERE N-CHANNEL MOSFETS ARE DRIVEN BY CHARGER IC. SINCE THERE IS NO PROPER COMMUNICATION BETWEEN SIO CHIP AND CHARGER IC INORDER TO CONTROL CURRENT
@@laptex1377 these voltages will be present in ideal scenario and I think that u asked for. All us know the cases are not same everytime. So I answered as per ideal situation.
I am always happy with your important and significant lesson specially when it is with English language . Thank you Sir!!
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great knowledge sir,we realy appreciate your effort in this repairing field
Thanks bro ☺️. Keep supporting and sharing our videos.
Laptex is the great then others. Thanks for all lapext team.
Always welcome dear 💞. Really appreciate your unconditional support 🤗
thank you so much sir.. what a beautiful explanation ..
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Voltage divider calculation at VR9 and VR12 will give 2.79v, However, this voltage will only come if +VA_AIR signal comes to voltage divider at PR14 and PR13. This signal goes to the base of the NPN transitor which switches on to shift the ground to the gate of PO4. This will pull the 10v from the voltage divider at PR 23 AND PR21 to ground and prevent the transistor PQ4 from switching on and pulling the 2.79v from the voltage divider VR9 and VR12 to ground.
Not exactly....it's not completely correct.
@@laptex1377 Please let me know where I went wrong
Okay
Thank you sir...need more videos like these
Always welcome dear 💞. Keep supporting and sharing our videos.
@@laptex1377 Definitely Sir ❤❤
😘😘💞
hi sir good morning ,
here i want to talk about to get ACDETrequired voltage .
the required voltage of ACDET is 2.6v
case (1)
if we get the PWRSRC (19v) only without having +VA_AIR (0v) then PQ4 will turn on and ground will go up .
and the ACDET circuit will work different
NOW R1 is pr9 and (pr12+pr8) will become parallel circuit and it is R2
here the ACDET voltage will be lower(1.5v) than required voltage ..so charging ic doesn't meet its requirement and it is not going to work .
case (2)
if we get +VA_AIR (18 to 19v) then PQ2 will turn on and also the PWRSRC will be grounded and PQ4 will not turn on ....
now the circuit of ACDET will work fine and we get required voltage (2.6v) of ACDDET and circuit will fine .
sorry sir for any mistake...🙏
Good
ACOK is generated by the internal LDO (REGN)of charging IC, which goes to the voltage divider at PR11 and PR10, which should be around 3v
Yeah good... Absolutely correct 💯
Sir I asked how much the price for a video that you put on youtube (how to solve DRAMRST Missing ....) they answered me that I have to buy the whole course. I think that it has become a business and no question of spreading knowledge. it's ridiculous.
It's not ridiculous... of course it's business we are doing business apart from spreading free knowledge. And proudly doing that because that's our bread and butter.
@@laptex1377 I understand that you are selling the solutions by video, but why all the videos, i just need one for this issue
Very good video👈
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Good
Thanks bro. Keep supporting and sharing our videos.
Sir MY VA+Air voltage missing what should i do ? ...ac detect voltage not proper comming
Check voltage divider circuit
I am facing same problem in haier laptop looking like this board.
I have found "HWMONITOR" and HWMONITOR1 on I.O thermal protect it was 2.7V on both pins whearas it should be 1.2 and 1.8V but unfortunatey after much struggle not able to find I.O thermal protect area.
Try to get reference from a similar board.
pleass sir i would like to inquire from you,can MISSING OF SMBUS (SCL&SDA) COMMINICATION CAUSE BOTH AC FET MOSFETS AND BATTERY MOSFETS TO DONOT SWITCH ESPECIALLY IN NVDC BUCK-BOOST CHARGER WHERE N-CHANNEL MOSFETS ARE DRIVEN BY CHARGER IC. SINCE THERE IS NO PROPER COMMUNICATION BETWEEN SIO CHIP AND CHARGER IC INORDER TO CONTROL CURRENT
Could be possible but depends on the programming
How much the cost of seminar sir?
Online video course available.
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Gate voltage generated by ACDRV has to be at least 6v above CMSRC, so if voltage is 20v then gate will be 26v
It means if CMSRC not coming then ACDRV should be 6V ???
When +VA_AIR is present -
ACDET=2.79V
When +VA_AIR is not present
ACDET=1.66V approx
Not exactly...it depends on the type of fault.
@@laptex1377 these voltages will be present in ideal scenario and I think that u asked for.
All us know the cases are not same everytime.
So I answered as per ideal situation.
Hi im getting same problem I'm getting 19v but i think I'm missing 3.3v
Check SIO requirements
Bro How can we join your class but we dont have paypal Can we pay in another way to Join Thanks to Replay Us
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can i buy case study videos??
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SIR GPU BGA chip replace KRDO MERE 1050 ti GRAPHIC CARD ki...
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