Lenovo Y700 NM-A541 Advanced Engineering

[Olles4]

Re: Lenovo Y700 NM-A541 Advanced Engineering

Why not answer completely? I asked for voltage reading on same pin as well.

Hello again. Im realy sorry for the misunderstanding I was busy and not at home.
The voltage reading is 0V

But there is still no voltage on mosfet PQ101 and 102
Meanwhile I got an other board same make and it's also a dead board when I plug it in I hear pulsing current and PU802 is getting hot/ pulsing hot (I have thermal camera)

[mcplslg123]

Re: Lenovo Y700 NM-A541 Advanced Engineering

No voltage is expected on pin5 of PU201 when 19V is not reaching CLR-so thats fine. Now focus on PU102 aka charging IC.

measure voltage on
pin1/2/3/4/5//6/24/28

[Olles4]

Re: Lenovo Y700 NM-A541 Advanced Engineering

No voltage is expected on pin5 of PU201 when 19V is not reaching CLR-so thats fine. Now focus on PU102 aka charging IC.

measure voltage on
pin1/2/3/4/5//6/24/28

Hello. I was measuring and PQ101 and PC646 was getting hot so i cant was afraid and didnt measured all the pins. is it ok if its getting hot?

[Olles4]

Re: Lenovo Y700 NM-A541 Advanced Engineering

No voltage is expected on pin5 of PU201 when 19V is not reaching CLR-so thats fine. Now focus on PU102 aka charging IC.

measure voltage on
pin1/2/3/4/5//6/24/28

ok so i measured it fast as i can ( but the current is pulsing and also i hear the the adapter is pulsing keep it in mind )

pin1- 150-330mv
pin2- 150-330mv
pin3- 150-300mv
pin4- 700mv-1,5V
pin5- 1,5mv
pin6- 100-150mv
pin24- 19mv
pin28- 600mv-1,3V

[mcplslg123]

Re: Lenovo Y700 NM-A541 Advanced Engineering

Its not ok for PQ101 to get hot. There is some short which you need to find out. Else, take help from a professional repair shop.

[Olles4]

Re: Lenovo Y700 NM-A541 Advanced Engineering

Its not ok for PQ101 to get hot. There is some short which you need to find out. Else, take help from a professional repair shop.

I got a spare board and PU201 is getting hot, what should i measure? 19V is ok

[mcplslg123]

Re: Lenovo Y700 NM-A541 Advanced Engineering

pu201,PIN5-is there any voltage there? Remove all power source, wait for 2-3 mins and then measure resistance to GND on pin5.What is the resistance value?