[SOLVED]820-3115 - 15V on PPBUS_G3H

[pws6074]

Guys,

Before the computer is pretty dead.
So, right now works fine, however, the PPBUS (just the charger plugged) i get 15V ( 60W original charge)
If i plug the battery with the charger, the green light start blinking.
If i plug just the battery without the charger, i get 11.89V on PPBUS.

So, did you guys any clue what happen?
Thank you

 

[dukefawks]

Probably shit Chinese charger. Check R7005, R7021/22/51/52. Probably a dead ISL6259 and Q7030/35 too.

 

[pws6074]

R7005, R7021/22/51/52- All ok
The charger is a 100% original.

Q7035:
Pin 5 = 16V
Pin 4 = 0V

Q7030
Both Sides 16V

ISL6259 - I don't replace yet.
CHGR_PHASE - 16V ( but is 12V on the schematic )

 

[smiba]

Dead ISL then with possible dead Q7030/35 like duke said. Lets us know how it works after replacing the ISL

 

[pws6074]

I will replace right now.

 

[pws6074]

Replaced and still CHGR_PHASE - 16V
And my PPBUS still 16V is crazy!

 

[smiba]

Resistance of PPDCIN_G3H_CHGR to CHGR_PHASE in Ohms?
Voltage of CHGR_UGATE?

You probably have a dead Q7030 and this may have killed the new ISL again as well

 

[dukefawks]

You must replace the ISL and Q7030/35 all at the same time. Also check the feedback resistors and traces, R7021/22/51/52.

 

[pws6074]

I just replaced the Q7030/35 and ISL and works!

Thank you for all the help!!!