Infinix Inbook Y2 Plus no Charge

[Dises]

Hello
Notebook Infinix Inbook Y2 Plus, MB EM_TG325_200B_V1.0. Power on but no charge.
The laptop starts and runs. When connect AC, it shows that it is charging, but the consumption is 0W.

Charger BQ24715:

no Batt / plug AC			with Batt / no AC			with Batt / plug AC
ACN	22.7		ACN	14.2		ACN	22.8
ACP	22.7		ACP	14.2		ACP	22.8
CMSRC	21.2		CMSRC	0		CMSRC	21.4
ACDRV	23.7		ACDRV	0		ACDRV	23.8
ACOK	2.5		ACOK	0		ACOK	3.7
ACDET	5.8		ACDET	0		ACDET	5.8
IOUT	0		IOUT	0		IOUT	0
SDA	3.5		SDA	0		SDA	3.8
SCL	3.5		SCL	0		SCL	3.8
CELL	3.3		CELL	0		CELL	3.6
BATDRV	1.5		BATDRV	6.1		BATDRV	6.3
SRN	1.5		SRN	14.6		SRN	14.5
SRP	1.5		SRP	14.6		SRP	14.5
GND	0		GND	0		GND	0
LODRV	0		LODRV	0		LODRV	0
REGEN	7.0		REGEN	0.1		REGEN	7.1
BTST	6.8		BTST	14.3		BTST	14.3
HIDRV	1.5		HIDRV	14.6		HIDRV	14.5
PHASE	1.5		PHASE	14.6		PHASE	14.5
VCC	23.5		VCC	0		VCC	23.5

Please, help, what need it take for the battery to start charging?

[mon2]

Can you link a schematic (if available)?

The measurements are better but there are still some issues.

Review the VCC pin on the charger IC. There should be a SOT-23 packaged (3 pins) dual diode (common cathode). When you apply only the adapter, VCC is powered OK.

When you apply only the charged battery, VCC = 0 volts. There is something wrong here. Most likely the dual diode is defective and needs to be replaced.

Remove all power. Meter in resistance mode.

Locate the 2 x DCin mosfets that mate with the charger IC and will be before the ACP / ACN pins.

Measure their resistance as follows:

source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)

Post each measurement. Each measurement must be hundreds of k ohms or higher else could be a defective mosfet.

Concerned about the ACDRV voltage which is about the same as the power adapter voltage. Often this means the DCin mosfets are defective. Most likely it will be the first mosfet but do measure the resistance of both mosfets. If the mosfets are NOT defective then ACDRV voltage = adapter voltage + REGN voltage = 20v + 5v = ~25 volts on the gate pin of the DCin mosfets.

[Stevedb]

Acdrive is too low and acn is too high.acdrive should be ,+-5v more then vcc

[mon2]

Confirm your meter battery is ok. Most of these measurements are too high. The power adapter should be ~19v.

The dual diode on the vcc pin of the charger IC appears to be defective. On battery only, vcc pin is at 0v.

[Dises]

Confirm your meter battery is ok. Most of these measurements are too high. The power adapter should be ~19v.

The dual diode on the vcc pin of the charger IC appears to be defective. On battery only, vcc pin is at 0v.

I'm sorry for my English, I'm writing through a translator. The laptop is charged via TYPE-C, there is no native adapter. I'm checking with a 65W adapter from Huawei. Now I'm going to try changing the battery on the tester and measure the voltage again.
The laptop starts and runs. When connect AC, it shows that it is charging, but the consumption is 0W.

[Dises]

Thanks, really, the battery on the tester is dead. Here are the correct readings.

no Batt / plug AC			with Batt / no AC			with Batt / plug AC
ACN	19.5		ACN	11.8		ACN	19.5
ACP	19.5		ACP	11.8		ACP	19.5
CMSRC	18.1		CMSRC	0.0		CMSRC	18.1
ACDRV	20.3		ACDRV	0,0		ACDRV	20.3
ACOK	2.1		ACOK	0,0		ACOK	3.1
ACDET	4.9		ACDET	0,0		ACDET	4.9
IOUT	0,0		IOUT	0,0		IOUT	0,0
SDA	3,0		SDA	0,0		SDA	3.2
SCL	3,0		SCL	0,0		SCL	3.2
CELL	2.8		CELL	0,0		CELL	3.1
BATDRV	1.2		BATDRV	5,0		BATDRV	5.2
SRN	1.3		SRN	12.2		SRN	12.1
SRP	1.3		SRP	12.2		SRP	12.1
GND	0,0		GND	0,0		GND	0,0
LODRV	0,0		LODRV	0,0		LODRV	0,0
REGEN	6,0		REGEN	0,0		REGEN	6,0
BTST	5.8		BTST	11.9		BTST	11.9
HIDRV	1.3		HIDRV	12.2		HIDRV	12.1
PHASE	1.3		PHASE	12.2		PHASE	12.1
VCC	19.9		VCC	0,0		VCC	19.9

[mon2]

Can you link a schematic (if available)?

The measurements are better but there are still some issues.

Review the VCC pin on the charger IC. There should be a SOT-23 packaged (3 pins) dual diode (common cathode). When you apply only the adapter, VCC is powered OK.

When you apply only the charged battery, VCC = 0 volts. There is something wrong here. Most likely the dual diode is defective and needs to be replaced.

Remove all power. Meter in resistance mode.

Locate the 2 x DCin mosfets that mate with the charger IC and will be before the ACP / ACN pins.

Measure their resistance as follows:

source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)

Post each measurement. Each measurement must be hundreds of k ohms or higher else could be a defective mosfet.

Concerned about the ACDRV voltage which is about the same as the power adapter voltage. Often this means the DCin mosfets are defective. Most likely it will be the first mosfet but do measure the resistance of both mosfets. If the mosfets are NOT defective then ACDRV voltage = adapter voltage + REGN voltage = 20v + 5v = ~25 volts on the gate pin of the DCin mosfets.

[Dises]

Can you link a schematic (if available)?
Concerned about the ACDRV voltage which is about the same as the power adapter voltage. Often this means the DCin mosfets are defective. Most likely it will be the first mosfet but do measure the resistance of both mosfets. If the mosfets are NOT defective then ACDRV voltage = adapter voltage + REGN voltage = 20v + 5v = ~25 volts on the gate pin of the DCin mosfets.

You're right, the first mosfet was breached. I replaced the mosfet, everything worked! Thank you very much!!!

[mon2]

Well done!!