Lenovo y50-70 boardview

[DeniS182]

Hi all,
I have this laptop with burned out pcb near DC in connector. Have someone boardview for this laptop?
Thanks.

[DeniS182]

Re: Lenovo y50-70 boardview

I replaced PQ301 and PQ302 and connect burned out traces, but I don't have voltage on drain PQ302. On gate and source is 20V. Someone to help me? Thanks.

[mielta]

Re: Lenovo y50-70 boardview

Hi
check Pacin the voltage on Gate must be lower on pq302 to work

[DeniS182]

Re: Lenovo y50-70 boardview

Pacin - pr311 - 0v

[mielta]

Re: Lenovo y50-70 boardview

messure Pu301 pin6

[smali]

Re: Lenovo y50-70 boardview

check pq307(A&B)dual fet and pin6 connectivity with pr301&pq305 base.

[DeniS182]

Re: Lenovo y50-70 boardview

PU301 - pin 6 - 0V
pq307 - pin 6 connectivity with pr301&pq305 base is ok
but pr301 to VIN is not connected, I connected it with wire.
pq307 seems to be ok, I test it with continuity.

[mielta]

Re: Lenovo y50-70 boardview

check PR309-vin

[DeniS182]

Re: Lenovo y50-70 boardview

PR309- ok and 0V
U have boardview ?

[smali]

Re: Lenovo y50-70 boardview

Check pc301 short circuit ..

[DeniS182]

Re: Lenovo y50-70 boardview

pc301 is not shorted

[DeniS182]

Re: Lenovo y50-70 boardview

Fixed, problem was in PR309 - wasn't connected to VIN.
Thanks all for answers.