HP Pavilion DV6 - 3017TU battery/charging issue

[IamPritesh]

HP Pavilion DV6 - 3017TU battery does not work properly. Laptop does not start without AC adapter. Inside windows , it says battery not detected although if you remove the AC adapter while Laptop is running, it still works fine.

I upgraded the Bios to F.29 but still problem exist.

Can anyone tell me where to start as far as checking voltages is concerned.. .

Thank you

[piernov]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Tried known good battery?
Give motherboard model number.

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Sorry for the late response.Was waiting for a good working battery to rule out battery issue. As expected tested with a known good battery but still same issue.
Board number A0LX6MB6F2 REV:F Quanta LX67
Unable to find the exact schematic. The one shared here, does not match.

Additional info : Laptop often boots into black screen and then I have remove and re-attach the battery for it to boot normally.

[piernov]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

I've seen bad batteries cause no POST issues too… but if you tried with a known good battery it must be something else. I guess something happening on the SMBUS.

So measure voltage and diode mode to ground on SMD and SMC on the battery connector (pins 3 and 4).

The schematics I have is for "PROJECT : LX6_LX7", is it the wrong one?

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Can you please share the schematic ..

So the measurements are as follow when connected with battery only:

Battery Voltage is 10.5 Volt
SMD - 1.5 Volt
SMC -3.3 Volt
Pin 6 : 1.5 Volt

Under Diode mode ( Red Probe to ground ) :
Pin 3 : 1.229
Pin 4 : 1.133

[piernov]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

This should be the correct one:
https://www.badcaps.net/forum/showpo...60&postcount=1

Make sure you got the pinout correct, otherwise there is probably an issue on SMD as it should be around 3.3V too. Check on AC only too.
Diode mode measurement is a bit weird, you should unplug the battery, but let's ignore that for now.

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

With AC only :

SMD - 1.2 volt
SMC - 3.3 volt

Checked with adapter and battery both attached :

SMD - 1.2 volt
SMC - 1.4 volt

Please suggest , thanks.

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Could this be a BIOS issue ? What is the source of SMD voltage when no battery is installed ? Is t directly coming from IO, if so why is IO generating 1.2 volt instead of 3volt?

[mcplslg123]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

yes it does connect to kbc chip. might be faulty.

[piernov]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

The lines are pulled up by R337 and R336. Check voltage on both sides of those, and check resistance across them. They may also be connected to the charger IC through PR80 and PR82 if they're present or jumped on the board.

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

The lines are pulled up by R337 and R336. Check voltage on both sides of those, and check resistance across them. They may also be connected to the charger IC through PR80 and PR82 if they're present or jumped on the board.

R336 is 3volt on one side and only 1.2 volt on the other. Please suggest

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Please advise. Should i just put a jumper on both end of the resistor r336

[mcplslg123]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Please advise. Should i just put a jumper on both end of the resistor r336

Is the resistor rating ok as per schematics(measurement should be done by taking it out of circuit)?? Resistance to ground on the side of 1.2V is ok?? If so, then try jumpering it.

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Is the resistor rating ok as per schematics(measurement should be done by taking it out of circuit)?? Resistance to ground on the side of 1.2V is ok?? If so, then try jumpering it.

Thanks I will check resistance to ground.

[mcplslg123]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

I beleive you are getting 3v on the resistor on the kbc side. Do make it sure.

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

I beleive you are getting 3v on the resistor on the kbc side. Do make it sure.

I am getting 3 volt on the 3VCPU side and 1.2 on the MBDATA side.

[mcplslg123]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

KBC seems faulty but check voltage on pin11 of pu5 & voltage on both sides of PR17

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

PU5 Pin 11 voltage is 1.2
PR17 voltage on both sides is also 1.2

[IamPritesh]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

PU5 Pin 11 voltage is 1.2
PR17 voltage on both sides is also 1.2

Is the Charging IC faulty or the KBC ?

[mcplslg123]

Re: HP Pavilion DV6 - 3017TU battery/charging issue

Is the Charging IC faulty or the KBC ?

I still beleive kbc is faulty but no harm in replacing charging ic first.