[help]ASUS K40C REV 2.1 DEAD

[mon2]

Re: [help]ASUS K40C REV 2.1 DEAD

1) Post the voltages on Q8815 & Q8814 mosfets with the adapter only.

2) Voltage of AC_IN_OC# ?

3) Voltage of AC_BAT_SYS ?

[phantomEVO]

Re: [help]ASUS K40C REV 2.1 DEAD

if i open boardview, there is no q8815 and 8814...i think the schematic it's sligthly different from the board view (board view is ok)

AC_IN_OC# 0v
AC_BAT_SYS 19v

[phantomEVO]

Re: [help]ASUS K40C REV 2.1 DEAD

should i give up?

[mon2]

Re: [help]ASUS K40C REV 2.1 DEAD

The charger IC should have 2 mosfets connected to the adapter connector.

Interested in the part numbers and voltages of each mosfet. Often the fault is with this area of the circuit.

[phantomEVO]

Re: [help]ASUS K40C REV 2.1 DEAD

could you help me to find those two mosfet? i'm a newbie...

i've attacched the board view some post ago

p.s i have 3,3 on the battery connector howevere

[phantomEVO]

Re: [help]ASUS K40C REV 2.1 DEAD

i hope those are the right mosfets...

on q8803 i have

19v on ac_bat_sys
1,8v on chg_lx that goes down to 0,6-0,5
0,8 on chg_hg that goes down

on q8813 i have

0,6 in chg_lx
0,3 on chg_lg

but it's very strange, like voltages are not stable at all...