La-501P does not charge the battery

[Varon23]

Hey!. The La-501P motherboard does not charge the battery.
It shows, for example, 30% and stands still. on different batteries. I changed and reprogrammed the BIOS and KBC. I replaced isl88739a. Further the same. I noticed that on "Amon" (6 PIN of the ISL system) there is a voltage of 4V and it should not.

No voltage at Comp_ChG (10 PIN)
and therefore there is no PQB1, PQB2 control
Someone can help me? Why does ISL generate an Amon signal?

[mon2]

What is the voltage to ground of the following pins on the charger IC?

ACIN
DCIN
ACOK
CSIP
CSIN

[Varon23]

ACIN-2V
DCIN- 19v

(Sometimes after connecting the power supply, the voltage jumps and the ticking is heard in the power supply):
ACOK-3V
CSiP-19V
CSIN-19V

[mon2]

ACIN is too low if truly at 2v with the adapter. This voltage should be 2v4 or higher to be able to announce that a suitable power adapter is attached.

Be sure the power adapter is the original and suitable power rated unit. If yes, check the resistors that are on this ACIN pin.

[Varon23]

I have a second efficient motherboard for comparison. There is an identical voltage on Acin. 2.2v. Official resistors.
The voltage is identical on the tilted batteries, but the damaged is accompanied by AMON.

What is this signal caused? Why did he appear?

In addition, I forgot to write that after starting the processor works on 0.78 GHz. Regardless of whether the power supply is connected or not.

[mon2]

See attached.

Measure the voltage to ground on each leg of resistor @ PRB12. The high side pin of PRB12 should be @ 5v.

Based on this voltage, the ACIN voltage should be @ ~3v. If the voltage is too low, the logic board is assuming that the power adapter is not suitable and then charging of the battery will halt. The CPU will also be throttled to save power.

[Varon23]

Acin- 3.2v
vdd_chg 5.2v

It is identical on an efficient motherboard.

[mon2]

Acin- 3.2v

??

Review post # 3.

[Varon23]

I see. In the Acin diagram he is as 1 pin in Boardview 1 pin to acin_chg a 2 pin is acin.

Acin- 3.2v
Acin_chg- 2v.

Sorry for oversight.