Help me 19V is missing on mosfet on LA-G07JP rev 2.0 - Badcaps

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kotar

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Join Date: Feb 2017

Posts: 19

Country: MYANMAR
#1

Help me 19V is missing on mosfet on LA-G07JP rev 2.0

09-26-2023, 12:33 PM

I change the same N ch mosfet nothing happen and i also change Charger ic nothing happen when i jumper Pin 5 to pin 1 19v Comes out and also 3V and 5V comes out power switch can on but 0.044 amp on DC Supply where can i check please
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Techtiger

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Join Date: Oct 2014

Posts: 1602

Country: france
#2

09-26-2023, 01:03 PM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Your ACDRV is missing GATE voltage must be high 22-28V+
Check resistance ACDRV CHARGING IC
Check resistance Diode mode
Source-Gate
Source-Drain
Gate-Drain
of both the dc-in fets
Voltage on PDB1 3 pins
Uploaded the schematic in Schematic section

Last edited by Techtiger; 09-26-2023, 01:25 PM.
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mcplslg123

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Join Date: Jun 2015

Posts: 7262

Country: india
#3

09-26-2023, 10:57 PM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Besides following the suggestions by @techtiger, report back on status of ACOK/ACDET
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ktmmotocross

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Join Date: Feb 2014

Posts: 3627

Country: slovakia
#4

09-27-2023, 03:30 PM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

replace both mosfets. if one is bad power will not pass first mosfet

and as it is HP u will need to check function of PS ID circuit

as u r using PSU that way it will not work if u dont have right resitance custom power cable

Last edited by ktmmotocross; 09-27-2023, 03:33 PM.
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kotar

Member

Join Date: Feb 2017

Posts: 19

Country: MYANMAR
#5

09-29-2023, 10:34 AM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Hello sir, PDB1 Pin no.1 has 19v Pin2 has 1.2v ?? Pin 3has 19v Sir
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kotar

Member

Join Date: Feb 2017

Posts: 19

Country: MYANMAR
#6

09-29-2023, 10:38 AM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Originally posted by Techtiger

Your ACDRV is missing GATE voltage must be high 22-28V+
Check resistance ACDRV CHARGING IC
Check resistance Diode mode
Source-Gate
Source-Drain
Gate-Drain
of both the dc-in fets
Voltage on PDB1 3 pins
Uploaded the schematic in Schematic section

Thanks Sir now i check as you say sir, PDB1 Pin1 has 19v pin2 has 1.2v pin3 has 19v sir ( the coil PLZ3 has shock to ground sir )
ACDRV resistor (PRB9) has 4.1K sir
DC IN Fets PQB11 and PQB12 were good
Where do i check sir

Last edited by kotar; 09-29-2023, 10:42 AM.
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kotar

Member

Join Date: Feb 2017

Posts: 19

Country: MYANMAR
#7

09-29-2023, 10:56 AM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Originally posted by mcplslg123

Besides following the suggestions by @techtiger, report back on status of ACOK/ACDET

ACOK=0V
ACDET=2.6V sir
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kotar

Member

Join Date: Feb 2017

Posts: 19

Country: MYANMAR
#8

09-29-2023, 10:58 AM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Originally posted by ktmmotocross

replace both mosfets. if one is bad power will not pass first mosfet

and as it is HP u will need to check function of PS ID circuit

as u r using PSU that way it will not work if u dont have right resitance custom power cable

Yes, sir! I also check with the right powercable sir. also check and also change both mosfets sir
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Techtiger

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Join Date: Oct 2014

Posts: 1602

Country: france
#9

09-29-2023, 01:50 PM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Originally posted by Techtiger

Your ACDRV is missing GATE voltage must be high 22-28V+
Check resistance ACDRV CHARGING IC
Check resistance Diode mode
Source-Gate
Source-Drain
Gate-Drain
of both the dc-in fets
Voltage on PDB1 3 pins
Uploaded the schematic in Schematic section

test the PQB13 SDG diode modes and PRB1 diode mode, and upload the measurements. Also, check the voltage of PUB1 pin 16
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kotar

Member

Join Date: Feb 2017

Posts: 19

Country: MYANMAR
#10

09-29-2023, 11:42 PM

Re: Help me 19V is missing on mosfet on LA-G07JP rev 2.0

Originally posted by Techtiger

test the PQB13 SDG diode modes and PRB1 diode mode, and upload the measurements. Also, check the voltage of PUB1 pin 16

pqb13 S to D = open, S to G = open, S to D = open
when remove fet and test S to D = open , S to G = open , S to D = short with 0 (Buzzing sound)
PRB1 with diode mode = 0.00 and (buzzing sound)
PUB1 pin 16 = 5.92 V
what should i do sir
Thanks for helping me sir
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