Samsung Np-R510 no charge.

[pocgoc]

Hello,
I've got a this Samsung R510,
I press the power button it comes on but maybe in a minute time it powers off (with the charger and battery plugged in).
If i leave it by itself with the charger plugged in (to build up a charge) and come back in 15 minutes it powers up no problem ,no random power offs.
It doesn't charge the battery always 40% as if i plug out the charger the laptop turns off and fails to use the battery as a power source.
I'm trying to to use this diagram.
I've trying to follow the Schematics of the R510 on the Power and charge Mangement page this board has an ISL6256ahrz IC controller not the ISL6256AHRZ-T like here
http://www.scribd.com/doc/135554184/Schematic-Diagram

Can i get help diagnosing which resistors and Gateways and Pins please.

I've replaced the DC Port
I've replaced the Charger
I've replaced the Battery.

And i think i might have to replace ISL6256AHrz

[pocgoc]

Re: Samsung Np-R510 no charge.

Mesaured the voltage of each pin:

[Tuomo]

Re: Samsung Np-R510 no charge.

Hello,
I've got a this Samsung R510,
I press the power button it comes on but maybe in a minute time it powers off (with the charger and battery plugged in).
If i leave it by itself with the charger plugged in (to build up a charge) and come back in 15 minutes it powers up no problem ,no random power offs.
It doesn't charge the battery always 40% as if i plug out the charger the laptop turns off and fails to use the battery as a power source.
I'm trying to to use this diagram.
I've trying to follow the Schematics of the R510 on the Power and charge Mangement page this board has an ISL6256ahrz IC controller not the ISL6256AHRZ-T like here
http://www.scribd.com/doc/135554184/Schematic-Diagram

Can i get help diagnosing which resistors and Gateways and Pins please.

I've replaced the DC Port
I've replaced the Charger
I've replaced the Battery.

And i think i might have to replace ISL6256AHrz

Check chips Q5, U3, U4, D7.

Then you can measure voltages on those chips.

[spidey]

Re: Samsung Np-R510 no charge.

EN = 00.2, vdd=0.8 find out why ? it looks like your problem is EC, not giving enable command to charger ic. Dcin is 18.89 is ok. But vdd is also not ok. vref =2.4 ok. btw did you measure this values with battery or without ?

[Tuomo]

Re: Samsung Np-R510 no charge.

EN = 00.2, vdd=0.8 find out why ? it looks like your problem is EC, not giving enable command to charger ic. Dcin is 18.89 is ok. But vdd is also not ok. vref =2.4 ok. btw did you measure this values with battery or without ?

What do you think ACPRN and DCPRN?

When AC Adapter is inserted ACSET, DCSET are > 1.26V so ACPRN and DCPRN should be LOW.

[pocgoc]

Re: Samsung Np-R510 no charge.

EN = 00.2, vdd=0.8 find out why ? it looks like your problem is EC, not giving enable command to charger ic. Dcin is 18.89 is ok. But vdd is also not ok. vref =2.4 ok. btw did you measure this values with battery or without ?

With battery in the values were measured.

[pocgoc]

Re: Samsung Np-R510 no charge.

without battery just charger
Q5 :
d= 19.03 g=9.50
d= 19.03 s=19.04
d= 19.03 s=19.04
d= 19.03 s=19.04

U3 :
d= 19.03 g=18.03
d= 19.03 s=18.53
d= 19.03 s=18.53
d= 19.03 s=18.53

U4 :
d= 0.438 g=18.52
d= 0.438 s=18.54
d= 0.438 s=18.53
d= 0.438 s=18.53

D7 has no chip soldered on to it its missing.

[pocgoc]

Re: Samsung Np-R510 no charge.

Check chips Q5, U3, U4, D7.

Then you can measure voltages on those chips.

with charger and battery plugged in.
Q5 :
d= 18.89 g=9.41
d= 18.89 s=18.92
d= 18.89 s=18.92
d= 18.89 s=18.92

U3 :
d= 18.89 g=17.72
d= 18.89 s=18.25
d= 18.89 s=18.25
d= 18.89 s=18.25

U4 :
d= 11.30 g=18.24
d= 11.30 s=18.23
d= 11.30 s=18.23
d= 11.30 s=18.23

D7 has no chip soldered on to it its missing.

[Tuomo]

Re: Samsung Np-R510 no charge.

with charger and battery plugged in.
Q5 :
d= 18.89 g=9.41
d= 18.89 s=18.92
d= 18.89 s=18.92
d= 18.89 s=18.92

U3 :
d= 18.89 g=17.72
d= 18.89 s=18.25
d= 18.89 s=18.25
d= 18.89 s=18.25

U4 :
d= 11.30 g=18.24
d= 11.30 s=18.23
d= 11.30 s=18.23
d= 11.30 s=18.23

D7 has no chip soldered on to it its missing.

U3 Gate voltage is 17V, it should not be OPEN if it same type as Q5.

Can you measure U3 chip.

Is there D522 chip?

Can you measure just Battery ON.

When AC Adapter is inserted ACPRN and DCPRN should go LOW.

This means at AC Adapter not detected, that is reason why not charging.

U3 control is also ACPRN so that is reason why Gate 17V.

I think ISL6256AHrz is failed.

[pocgoc]

Re: Samsung Np-R510 no charge.

U3 Gate voltage is 17V, it should not be OPEN if it same type as Q5.

Can you measure U3 chip.

Is there D522 chip?

Can you measure just Battery ON.

When AC Adapter is inserted ACPRN and DCPRN should go LOW.

This means at AC Adapter not detected, that is reason why not charging.

U3 control is also ACPRN so that is reason why Gate 17V.

I think ISL6256AHrz is failed.

Thanks mate , I've ordered a ISL6256 IC .

There is no D522 chip either.

[Francisco.s]

Re: Samsung Np-R510 no charge.

Could anyone post a link to the Samsung Np-R510 in pdf format?
Thanks.

[pocgoc]

Re: Samsung Np-R510 no charge.

Could anyone post a link to the Samsung Np-R510 in pdf format?
Thanks.

http://www.scribd.com/doc/135554184/Schematic-Diagram

[Tuomo]

Re: Samsung Np-R510 no charge.

Thanks mate , I've ordered a ISL6256 IC .

There is no D522 chip either.

No problem, check U3 too it may broken also.

Use resistance mode and measure D to S and S to D.

It should show high resistance other side and low resistance other way.

[pocgoc]

Re: Samsung Np-R510 no charge.

No problem, check U3 too it may broken also.

Use resistance mode and measure D to S and S to D.

It should show high resistance other side and low resistance other way.

Thanks .
D->S =OL (very high)
S->D =2.716
S->D =2.716
S->D =2.716

Again Thanks

[Francisco.s]

Re: Samsung Np-R510 no charge.

Hi pocgoc, ACSET, (pin 27) detects the presence of AC Adapter, so you should check the value of R532, R573, and R794. They sets the voltage to detect the AC adapter. (should be > 1.26 volts, when AC Adapter is present)
Regards.

[pocgoc]

Re: Samsung Np-R510 no charge.

Hi pocgoc, ACSET, (pin 27) detects the presence of AC Adapter, so you should check the value of R532, R573, and R794. They sets the voltage to detect the AC adapter. (should be > 1.26 volts, when AC Adapter is present)
Regards.

couldn't find R573 on schematic page.
But r532 was constantly rising in Mega ohms (damaged).
R533 = 26.5K
R794 = 300K

[Francisco.s]

Re: Samsung Np-R510 no charge.

couldn't find R573 on schematic page.
But r532 was constantly rising in Mega ohms (damaged).
R533 = 26.5K
R794 = 300K

I think you have encountered the component that causes the problem.
If value of R532 is not what schematic says, (300K) then the voltage at pin 27 will be wrong, and AC adaptor won´t be detected.
You should replace it. I have mistaken R573, I wanted to say R533.
Regards.

[pocgoc]

Re: Samsung Np-R510 no charge.

I think you have encountered the component that causes the problem.
If value of R532 is not what schematic says, (300K) then the voltage at pin 27 will be wrong, and AC adaptor won´t be detected.
You should replace it. I have mistaken R573, I wanted to say R533.
Regards.

Thank you Fanncisco.s for extremely helpful knowledge and time.

[Francisco.s]

Re: Samsung Np-R510 no charge.

Some pint of Guinness!!