lenovo 330s-15ikb

[riki_22]

hi, in this laptop i found a mosfet in short, the serigraphy name is J8 GUC, in the position mainboard Q8902, can anyone help me identify this mosfet?
i can't find schematic.

[Techtiger]

Re: lenovo 330s-15ikb

Search the schematic EG521 EG522 EZ511 EG721 NM-B451
If it’s a MOSFET it’s either N or P channel

[Draconian]

Re: lenovo 330s-15ikb

Could you provide more information on how you've tested that the mosfet is short.

Also what type of mosfet are we talking about as your post suggests there is little information available online however with a little extra info like what the mosfet is doing and what channel type it is you can likely make a substitution for something else that'll do the job.

[riki_22]

Re: lenovo 330s-15ikb

removing the mosfet from the mainboard source and drain is in short, it is the second mosfet in series after dcin for power.
and I thought to change it with P0903BEA, because in some asus models they do the same job.

[Techtiger]

Re: lenovo 330s-15ikb

removing the mosfet from the mainboard source and drain is in short, it is the second mosfet in series after dcin for power.
and I thought to change it with P0903BEA, because in some asus models they do the same job.

check the voltage on the 1st fet Gate with out the second Fet less than 10V its P channel above 22V its N channel

[riki_22]

Re: lenovo 330s-15ikb

check the voltage on the 1st fet Gate with out the second Fet less than 10V its P channel above 22V its N channel

Thanks a lot, in this case the gate is 25v, which mosfet N equivalent do you recommend?

[Techtiger]

Re: lenovo 330s-15ikb

Thanks a lot, in this case the gate is 25v, which mosfet N equivalent do you recommend?

Any Fet with 30V N channel