Re: Asus UX330CA Rev2.0 1Short1long1Short 19V No Power

Cannot remove the RAM.(D9TDZ) The SuperIO (ithink) is ITE IT8995VG-128.
i attach a pic of the board with the Measured Voltages and resistance to the ground.
Next to the 2 coils (the 57 ohm and 100 ohm) is APW6002 which i didnt find datasheet.
Also i cannot find the Datasheet for SuperIO ITE IT8995VG-128 so i cant measure any voltage or signals!
Thanks Again !...

Re: Asus UX330CA Rev2.0 1Short1long1Short 19V No Power

Unfortunately no.I search the "whole internet " for Schematics and boardview but nothing !Sorry for the time taking from you ! I am happy for the quick response ! When you have the time ! no worries ! its already amazing that i have someone to explain and help me with this ! Any ideas? its not the BQ24780S ?

Re: Asus UX330CA Rev2.0 1Short1long1Short 19V No Power

I measuring now It start from 1.5 Mohm and i am at 5.1 Mohm and still climbing (slower than in the beginning ) i put my lead after the 2nd mosfet just before 10mohm current resistor !
Thank you for helping me !Learning a lot just by reading cases here and from you guys !

Re: Asus UX330CA Rev2.0 1Short1long1Short 19V No Power

Thanks for the quick Response !
It's not the original charger ! A dc jack that i hook on to my lab power supply
The Board needs 19V 2.37A !
I will do that
.....................
So i measure the 2 DC-in Mosfets
E180AJ (1st mosfet)
Diode measure 0.4V Source (+) Drain (-)
In reverse OL

D-S 1.8 Mohm
G-D 1.08 Mohm
G-S 1.72 Mohm
A5GNB (2nd mosfet)
Diode measure 0.5 Source (+) Drain (-)
In reverse OL
D-S 5.7 Mohm
G-S 2.08 Mohm...

I have a UX330CA Rev 2.0 motherboard (Asus)
NOTE: Led Flashes White for 1 Short (Gives V+) , 1Long , 1 Short (Give V+)
then Nothhing !
DC–in MOSFETS measure ok ! no shorts ! 3.3V and 5V coil show for the duration of Led Flashing.
3.3V Coil to ground -> 14 K ohm
5V Coil to ground -> 16K ohm
BQ24780S
VCC -> 19V stays
RGEN -> 6V stays
ACOK -> 5V for the duration of Led Flashing
ACDRV -> 24V for the duration of Led Flashing
ACN -> 19v fluctuates to 3.7V for the duration of Led Flashing , Then drops...

Re: Laptop battery charging circuit

Thank you for the Information and starting guide for Charger IC !

The problem of the motherboard is doing ... 2 white led flashes! I check starter MOSFETS also i measure 19V at the time it flashes the white led it checks ok in Current Res. And also in 3.3V Coil and 5V coil .After it turns off , the voltage drops until it reach 0V.Check for shorts on PwR sections on Caps.Checked the Starter MOSFETS for short all good ! Also the MSOFETS of the Power Section of 3.3v and 5v High and low and trace from TPS51285A to the sourounding area ! Checked the BQ24780S in Vcc it has 19V and i am still checking that Charger Chip.
Anyone has ever encounter this Board before...

Anyone has the Boardview and Schematics for UX330CA Rev 2.0 ?
Thanks !

Re: New Members - please post your introductions here

Hello All My Name Is Athinodoros
and i am starting learning electronics !!!
Need the knowledge for repairing computer boards
And this place is so full of people who are willing to help a lot !!

Thanks!!!