ACER D270 3V and 5V ALW Missing

[ch3nzu]

Hi guys, I need help here
I have Acer D270 with no 3V and 5V ALW output.
When I plug the power adaptor, no Current was drawn.
There is no 3.3V in power button.

I'm focusing at RT8223M, already check voltage in each input/output pin
Pin 16- VIN = 18.88V
Pin 13 - EN =6.15V
Pin 18 -ENC = 3.3V
Pin 3 - REF = 2V
Pin 8 -VREG3 = 3.3V
Pin 17 - VREG5 = 5V
Pin 1 = ENTRIP1 = 0.99V
Pin 6 = ENTRIP2 = 0.5V
Pin 19 =LGATE1 = 5V
Pin 12 = LGATE2 = 0V
Pin 21 = UGATE1 = 0V
Pin 10 = UGATE2 = 0V


Any suggesion where to check?
already replace the ic RT8223M, but no result

Mayb ENTRIP2 is to low?

Link to schematic - https://www.badcaps.net/forum/showthread.php?p=1263291
.

[Techtiger]

Re: ACER D270 3V and 5V ALW Missing

PQ 38 voltage on SDG ? What is the resistance to ground PL 3 /4?

[ch3nzu]

Re: ACER D270 3V and 5V ALW Missing

PQ 38 voltage on SDG ? What is the resistance to ground PL 3 /4?

PQ38
S = 18.88V
D = 18.88V
G = 9.31V

Resistance to ground :
PL4 = 1.69K ohm
PL3 = 2K ohm

[Techtiger]

Re: ACER D270 3V and 5V ALW Missing

Pin 4 tonsel 2V missing
Pin14 skipsel 3.3v missing
Pin18 main enable missing 3.3v
Pin 1 1.1V entrip1 ok
Pin 6 0.79xx - 1.26 V entrip2 try to measure the voltage again ?

[Techtiger]

Re: ACER D270 3V and 5V ALW Missing

Resistance to ground :in diode mood for continuity again
PL4 =
PL3 =

[ch3nzu]

Re: ACER D270 3V and 5V ALW Missing

Pin 4 tonsel 2V missing
Pin14 skipsel 3.3v missing
Pin18 main enable missing 3.3v
Pin 1 1.1V entrip1 ok
Pin 6 0.79xx - 1.26 V entrip2 try to measure the voltage again ?

Pin 4 = 0V
Pin 14 = 0V
Pin 18 = 3.3V
Pin 1 = 0.98V
Pin 6 = 0.49V

On Diode mode
PL3 = 0.254V
PL4 = 0.231V

[Techtiger]

Re: ACER D270 3V and 5V ALW Missing

Pin 4 = 0V
Pin 14 = 0V
Pin 18 = 3.3V
Pin 1 = 0.98V
Pin 6 = 0.49V

On Diode mode
PL3 = 0.254V
PL4 = 0.231V

PQ14 PQ13 check the drain for +19

[ch3nzu]

Re: ACER D270 3V and 5V ALW Missing

PQ14 PQ13 check the drain for +19

Already checked, there was 19V there, both in PQ13 and PQ14.

Looks like I've bought a defective chip here, I'm so confused.
Maybe I will buy another chip, and try again.

[ch3nzu]

Re: ACER D270 3V and 5V ALW Missing

For anyone who still searching the answer,
I already found the problem, I replaced both capasitors (PC46 and PC58).
Now I have the 3.3V and 5V, and my netbook can turn on normally.