Asus X415EA not charging battery

[mon2]

Replace the 2 mosfets linked to the battery charging - high side and low side.

[johnbeton]

hi, I already changed them but no result, I started measuring all over, and noticed I have 5.87V at PT8901, but only 0.9V at the gate of PQH8902 and pin 1 of PR8969.
The resistance between PT8901 and the mosfet and resistor is 17,5KOhm.
If i'm not mistaken in reading the schematic and boardview this should be a direct trace with very low resistance.
Is it safe to make a bridge between PT8901 and pin 1 of the resistor or to the gate of PQH8902 ?

[Sephir0th]

Between PQH8902 GATE and PU8900 Pin 26, the resistance should be zero, if this was the question.

PR8969 is a 10 KOhms resistor between HIDRV (Pin 26) and PHASE (Pin 27) and has nothing to do with the connection between the Mosfets GATE and the Charging Controller.

[johnbeton]

Indeed the resistance of the circuit should be zero, but it is 17.5KOhm.
I understand the 10k resistor has nothing to do with the connection between mosfet gate and charging controller. But it is easier for me to solder a jumper wire to pin 1 of the resistor than on the gate of the mosfet. (since these pins are in the same circuit).

Anyway I'm going to jump this with a wire and test

[johnbeton]

Fixed !
The jumperwire did the trick.
Thanks for everyone who guided me.

[KANSRVERO]

Good morning, I have an Adus X413E laptop that won't charge. 19V reaches pad 3 of the BAT54CW SCHOTTKY diode, and 18V should be output on pad 1, which is the BAT line, but only 0.6V is output.
I measured the diode scales, and the SCHOTTKY, pad 1 anode to pad 3 cathode, reads 0.2V; pad 2 anode to pad 3 cathode, reads 0.2V. When I reverse the leads of the OL multimeter, this tells me the Schottky is good, but no voltage is output.
I would appreciate some guidance on a possible solution.

[mon2]

Can you confirm how you are measuring the voltage to ground on this dual diode?

Voltage should enter either pins #1 or #2 and will output to pin #3 to power the charger IC.

See below.

[KANSRVERO]

According to the boardview, the voltage exits the PU8900 IC through pad 28, which connects to pad 1 of diode D8908, which in turn connects to pad 1 of PC8941 and pad 2 of PR8916; pad 1 of PR8916 connects to pad 3 (this pad receives 19V) of PD8900; Looking back, pad 2 of PD8900 has 19V, and pad 2 should output 18V because this pad connects to other components that go to the battery connector. I'll attach images and upload the boardview.

[mon2]

See attached. This is the schematic for the X421.

[KANSRVERO]

See attached. This is the schematic for the X421.

I misspelled the 19V voltage coming from pad 28 of the PU8900 IC; it passes through the diode, the capacitor, and a resistor, then reaches pad 3 (P_CHG_VCC_R_30) of the PD8900 dual diode (19V).
Pad 2 (A/D_DOCK_IN) has 18V, and pad 1 (BAT) has no voltage output.
To measure, I use a multimeter, negative to ground and positive to pad3 (19V), and the same goes for pad2 (18V) and pad1 has no voltage.

[mon2]

Ok. Measure the voltage to ground of:

ACDET ; pin 6
ACOK ; pin 5
ACDRV ; pin 4

on the charger IC. Post each measurement.

[virusjez]

whsta can i check if the P_SMB0_DATA is only .8v when the batt is pressent...1v if not pressent...

[mon2]

Remove all power. Meter in resistance mode.

Measure the resistance to ground of P_SMB0_DATA. Post the measurement.

[virusjez]

16K ohms sir mon2.. itried to jumper the r3020 3va_ec pin2 and P_SMB0_DATA. it charge now and the voltage of data is now 1.8v

[mon2]

R3020 may be defective. Measure its resistance across this resistor to confirm without power to the board. Good find!