Please Help : Hp Cq43 Charging percentage does not increase

[IamPritesh]

You all have helped me in the past many times. So thank you

I have this HP CQ43 motherboard which does not increase charge percentage at all. The status on windows it says"Plugged in charging" but the fact is it does not charge the battery. Upon investigation I found that the gate pin on the upper mostfect of the charging IC has only 6 Volt . I have changed the IC 0z8660ln with one from the donor board but the symptoms are still same. I believe the voltage should be around 12Volt for the battery to start charging the battery

Also checked the signal AC_OFF to be low on only battery_only_mode and also in Adapater+Battery mode..
I am having a hard time trying to figure out why I have only 6 volts on the gate of the charging mosfet [Q0901] .

Please advise as it is kind of urgent.

[piernov]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Tried known good battery?

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Tried known good battery?

Oh yes tried with multiple know batteries.

[ktmmotocross]

Re: Please Help : Hp Cq43 Charging percentage does not increase

did u check voltages by that table on charger page ?

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

did u check voltages by that table on charger page ?

Yes sir . Please see this attachment

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

what should be the ideal voltage at PIN 12 and 13 ?

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Also what should be the voltage on CHG_ACOFF_EN_10

[ktmmotocross]

Re: Please Help : Hp Cq43 Charging percentage does not increase

damn dude, u cannot read schematic?

it issame as ac_off and AC_OFF u see in that table

measure voltages on all pins of charger ic and wrote it to your image in battery+charger mode

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Here is the CHARGING IC DETAILS:

1. 19.42
2. 19.64
3. 19.68
4. 10.48
5. 10.39
6. 5.78
7. 0V
8. 5.71
9. 3.3
10. 3.3
11. 1.8
12. 10.75
13. 9.6
14. 9.2
15. 5.8
16. 0

OTHER Measurements :
AC_OFF = 0V
TRAVELADP = 2.8
ADAPT_OC_IINP = 0V

MEASUREMENT FOR u0902
1= 0V
2=0V
3= 8.8V
4=19.6
5=18.6
6=18.6

[Techtiger]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Pin 11 DATA line Voltage is low this line pull down by 2.2K R123 3.3V trace it back first

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Sorry PIN 11 is 3.3 . I must have typed it incorrectly.. Pin 7 is 0 volt .

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Its fixed now. It was a capacitor connected to the schotty Diode. THank you all of you

[Techtiger]

Re: Please Help : Hp Cq43 Charging percentage does not increase

Its fixed now. It was a capacitor connected to the schotty Diode. THank you all of you

Part number of the Diode?

[ktmmotocross]

Re: Please Help : Hp Cq43 Charging percentage does not increase

u mean C0905?

[IamPritesh]

Re: Please Help : Hp Cq43 Charging percentage does not increase

It was C0909