Clevo N850HK and P2808

[jasko_jacker]

This clevo came with a pch in short and a PQ25 very hot (this mosfet is ok and I have 3.5 Ohm PL10 VCORE ??? see pag. 97), after removed it I'm waiting to order a new one because I'd want to check for other issue.
1) No VDD5 , caused by missing signal DD_ON, reading the power sequence pag. 112 this signal should be present, it is generated by U26 pag. 93 (P2808 http://www.datasheetcafe.com/p2808-d...controller-ic/) , on it I read:
1-19V 2-19V 3-19V 4-0V 5-0V 6-3.3V 7-0V (DD_ON) 8-19V
if I remove Q49 (A-B) I exclude DD_ON and VDD5 increases to 5V.
2) 3.5 Ohm on VCORE is too low ?
thanks

[jasko_jacker]

Re: Clevo N850HK and P2808

I'm not sure if p2808 generates DD_ON because if this diagramm (https://ascnb1.ru/forma1/viewtopic.p...=P2808#p474062) is correct pin 7 of p2808 is a gate....

[caspian]

Re: Clevo N850HK and P2808

DD_ON is not generated by p2808 . It is generated by IT8587 in Page 91.

[jasko_jacker]

Re: Clevo N850HK and P2808

DD_ON is not generated by p2808 . It is generated by IT8587 in Page 91.

Thanks

[jasko_jacker]

Re: Clevo N850HK and P2808

I substitute EC, reprogrammed without problems,
no pch in place
but when:

1-> connect adapter -> POWER LED D55 is orange
2-> push power button
2a-> LED D52 (HDD) is green
2b-> LED D55 (POWER L.) is green
VDD5 is 5V
but after 2sec all return point 1

If I connect battery and adapter without push power button:
1-> POWER LED IS ORANGE
2-> BATT LED IS ORANGE
on battery connector there is 12V
but after 1-2 min
BATT LED IS OFF
POWER LED IS ORANGE

but the battery should be charged even without pch ???