Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Laptops, Portable, and Mobile Devices
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 01-12-2019, 11:09 AM   #1
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default pls help help hp dv6-3357sf no light no power .

the problem cause is a laptop charger
the charger id pin gives 18.5 v
when the client plugs in the charger in the laptop the laptop dead .
hp dv6-3357sf quanta LX6
no power , no light .




PU5
1=18.5v
9=3.2v
CN15
brown wire =2.2v
red wires=18.5v
other wires =0v
Attached Files
File Type: pdf hp_quanta_lx6__lx7_r1a_schematics_121.pdf (2.94 MB, 14 views)

Last edited by mo000; 01-12-2019 at 11:17 AM..
mo000 is offline   Reply With Quote
Old 01-12-2019, 11:18 AM   #2
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

is there any why to make a laptop run without charger circuit .
mo000 is offline   Reply With Quote
Old 01-12-2019, 12:23 PM   #3
techtiger
Badcaps Veteran
 
Join Date: Oct 2014
City & State: paris
My Country: france
I'm a: Knowledge Seeker
Posts: 346
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by mo000 View Post
is there any why to make a laptop run without charger circuit .
No but from the Battery it might work
Test continuity with the help of a multimeter PQ42 Drain to Source & Gate Short

Last edited by techtiger; 01-12-2019 at 12:28 PM..
techtiger is offline   Reply With Quote
Old 01-12-2019, 01:24 PM   #4
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

resistor PR226 burns each time i plug in the charger .
mo000 is offline   Reply With Quote
Old 01-12-2019, 01:26 PM   #5
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by techtiger View Post
No but from the Battery it might work
Test continuity with the help of a multimeter PQ42 Drain to Source & Gate Short
PQ42 work fine i replace it before but the same problem .
mo000 is offline   Reply With Quote
Old 01-12-2019, 01:41 PM   #6
techtiger
Badcaps Veteran
 
Join Date: Oct 2014
City & State: paris
My Country: france
I'm a: Knowledge Seeker
Posts: 346
Default Re: pls help help hp dv6-3357sf no light no power .

Ok Remove PR226 and test the resistance both sides of the line
Test this point’s after to Resistance with Multimètre
+VAD

Last edited by techtiger; 01-12-2019 at 02:35 PM..
techtiger is offline   Reply With Quote
Old 01-12-2019, 02:41 PM   #7
jasko_jacker
Badcaps Veteran
 
Join Date: Oct 2014
City & State: roma
My Country: italy
Line Voltage: 220 V
I'm a: Knowledge Seeker
Posts: 508
Default Re: pls help help hp dv6-3357sf no light no power .

Normally this motherboard requires (page 42 CN15) the AD_ID signal so you only use original or compatible adapters for this model. We should check if there is a short circuit + VA or + VAD or + VIN, check the ohms on those points with the multimeter.
Report the results
jasko_jacker is offline   Reply With Quote
Old 01-16-2019, 06:32 PM   #8
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by techtiger View Post
Ok Remove PR226 and test the resistance both sides of the line
Test this point’s after to Resistance with Multimètre
+VAD
i test the resistance both sides but no short circuit ; side gives 18.5v and other sides gives me a high ohms value because it's connected with capacitos .

i can't find pr139 for test VAD_1


but the pin 14 gives me 2.15v


and here

Last edited by mo000; 01-16-2019 at 06:35 PM..
mo000 is offline   Reply With Quote
Old 01-16-2019, 06:54 PM   #9
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

the motherboard and schematic are different
this is PU8


and this in blue circle suppose to be PU8


but a lot of components are missing like PD17 and pr124 pr141 ...

Last edited by mo000; 01-16-2019 at 06:56 PM..
mo000 is offline   Reply With Quote
Old 01-16-2019, 11:38 PM   #10
on/off
Badcaps Veteran
 
on/off's Avatar
 
Join Date: Oct 2016
City & State: Forbidden
My Country: Indonesia
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 217
Default Re: pls help help hp dv6-3357sf no light no power .

High (no) Res Image LX6:



Edit: Look like someone whom was degrade the image resolution, original link at rusfolder was dead.
Note: if you got issue when extract it, try use 7zip.
Attached Files
File Type: zip LX6.zip (13.58 MB, 4 views)
on/off is offline   Reply With Quote
Old 01-17-2019, 12:39 AM   #11
on/off
Badcaps Veteran
 
on/off's Avatar
 
Join Date: Oct 2016
City & State: Forbidden
My Country: Indonesia
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 217
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by mo000 View Post
the motherboard and schematic are different
this is PU8
Seem All matched

Hope this helps
Attached Images
File Type: jpg LX6 REV mo000.jpg (1.71 MB, 10 views)
on/off is offline   Reply With Quote
Old 01-17-2019, 03:20 AM   #12
techtiger
Badcaps Veteran
 
Join Date: Oct 2014
City & State: paris
My Country: france
I'm a: Knowledge Seeker
Posts: 346
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by mo000 View Post
the motherboard and schematic are different
this is PU8


and this in blue circle suppose to be PU8


but a lot of components are missing like PD17 and pr124 pr141 ...
yes this Schematic is Different mesure Voltage in this area , did you resistor PR226 ?
Attached Images
File Type: jpg hp dv6.jpg (415.8 KB, 8 views)

Last edited by techtiger; 01-17-2019 at 03:27 AM..
techtiger is offline   Reply With Quote
Old 01-17-2019, 04:14 AM   #13
on/off
Badcaps Veteran
 
on/off's Avatar
 
Join Date: Oct 2016
City & State: Forbidden
My Country: Indonesia
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 217
Default Re: pls help help hp dv6-3357sf no light no power .

  • VH28 is output voltage from PU8 as voltage pump to activate PQ42 (need gate higher than source or drain).
  • if PR226 blown then there is something in circuits, maybe PU8 (maybe other IC too) was broken.
  • Need to check many net those point as per post7#
  • Also make sure the charger known as good original adapter ( i think client charger has modify).


Note:
  • I didn't see schematic different with real board....so confuse??
  • * mark on schematic mean not installed.
  • but if * then /S mean is short or pad jumper like PR131.

Boardview attached and datasheet
Attached Files
File Type: rar HP Pavillion DV6 DV7 DA0LX6MB6H1 Quanta LX67-MB-F.rar (335.6 KB, 8 views)
File Type: pdf EDS-5934.pdf (67.8 KB, 4 views)
on/off is offline   Reply With Quote
Old 01-19-2019, 07:34 AM   #14
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by on/off View Post
  • VH28 is output voltage from PU8 as voltage pump to activate PQ42 (need gate higher than source or drain).
  • if PR226 blown then there is something in circuits, maybe PU8 (maybe other IC too) was broken.
  • Need to check many net those point as per post7#
  • Also make sure the charger known as good original adapter ( i think client charger has modify).


Note:
  • I didn't see schematic different with real board....so confuse??
  • * mark on schematic mean not installed.
  • but if * then /S mean is short or pad jumper like PR131.

Boardview attached and datasheet
thank you very much for your help
pu8 activate pq42 gate
PU8 Vout VH28=0v
because no vin

pr226 attached directly to pu8 i think the problem in pu8 .
is there any way to make the motherboard powered from the power ic directly without charge circuit .

Last edited by mo000; 01-19-2019 at 08:55 AM..
mo000 is offline   Reply With Quote
Old 01-19-2019, 07:56 AM   #15
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by on/off View Post
  • VH28 is output voltage from PU8 as voltage pump to activate PQ42 (need gate higher than source or drain).
  • if PR226 blown then there is something in circuits, maybe PU8 (maybe other IC too) was broken.
  • Need to check many net those point as per post7#
  • Also make sure the charger known as good original adapter ( i think client charger has modify).


Note:
  • I didn't see schematic different with real board....so confuse??
  • * mark on schematic mean not installed.
  • but if * then /S mean is short or pad jumper like PR131.

Boardview attached and datasheet
pr226 pass the vin to pu8 but pr226 burns
i make a jumber from pr226 point to pu8 vin pin but pu8 began to heat so much .
mo000 is offline   Reply With Quote
Old 01-19-2019, 10:01 AM   #16
on/off
Badcaps Veteran
 
on/off's Avatar
 
Join Date: Oct 2016
City & State: Forbidden
My Country: Indonesia
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 217
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by mo000 View Post
thank you very much for your help
pu8 activate pq42 gate
PU8 Vout VH28=0v
because no vin

pr226 attached directly to pu8 i think the problem in pu8 .
is there any way to make the motherboard powered from the power ic directly without charge circuit .
I assume you have original adapter.
+PRWSRC and +VIN weren't short to ground.
  • There is "good word" on this forum which tell us that The important is you know "How its work". Then you know why its failed.

AFAIK Rules mosfet on block charger:
  • ACFET N-channel MOS required High on gate.(usually from pump ic charger or need external pump from other ICs-depend on circuit schematic).
  • ACFET P-channel MOS required LOW ( usually have voltage from source/drain-depend on circuit schematic)

Required to laptop can turn on:
  • +PRWSRC and +VIN have ~19V. as supply for LDO and other circuit regulator e.g 3V/5V and LED panel.
  • PQ42 active/ON, gate required High than drain.
  • VH28 approx ~25V-28V present via PR15 (check both side of PR15, present or not).

PU8
  • PU8 should work and there aren't pinout have shorted (except pin21)
  • input present and have output VH28.
  • P2805PG present (3.3V), VSENSE( approx 2.2V) REG (12V)

PU5
  • PU5 have input (pin1 VAC generated from +VA via PD8>PD6>PR67).
  • Voltage on both VDDA/VDDP approx 5V
  • ACAV present 3.3V and generate as ACIN signal via PR84.
  • Also ACIN signal require for generate PQ19 (PNP-NPN on SC-74 package) so when pin 5 be ON, pin 2 be OFF, then +VAD cross to pin 6 PQ19.
  • When +VAD present, PQ4 be ON via resistor divider PR192-PR228, Though VH28 present if this fet ON make PQ42 be OFF.
  • ACIN signal require to make PQ3 be ON and PQ4 be OFF, then PQ42 be ON and generate +PRWSRC/+VIN

Quote:
Originally Posted by mo000 View Post
pr226 pass the vin to pu8 but pr226 burns
i make a jumber from pr226 point to pu8 vin pin but pu8 began to heat so much .
Pull out the PU8 and check all pin out of pad PU8 for shorted, if shorted gone replace PU8.

Note:
  • Need check carefull, also double check for shorted.
  • Don't apply power till short gone.

Hope you understand with my poor grammar

Last edited by on/off; 01-19-2019 at 10:09 AM..
on/off is offline   Reply With Quote
Old 01-19-2019, 01:25 PM   #17
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

Quote:
Originally Posted by on/off View Post
I assume you have original adapter.
+PRWSRC and +VIN weren't short to ground.
  • There is "good word" on this forum which tell us that The important is you know "How its work". Then you know why its failed.

AFAIK Rules mosfet on block charger:
  • ACFET N-channel MOS required High on gate.(usually from pump ic charger or need external pump from other ICs-depend on circuit schematic).
  • ACFET P-channel MOS required LOW ( usually have voltage from source/drain-depend on circuit schematic)

Required to laptop can turn on:
  • +PRWSRC and +VIN have ~19V. as supply for LDO and other circuit regulator e.g 3V/5V and LED panel.
  • PQ42 active/ON, gate required High than drain.
  • VH28 approx ~25V-28V present via PR15 (check both side of PR15, present or not).

PU8
  • PU8 should work and there aren't pinout have shorted (except pin21)
  • input present and have output VH28.
  • P2805PG present (3.3V), VSENSE( approx 2.2V) REG (12V)

PU5
  • PU5 have input (pin1 VAC generated from +VA via PD8>PD6>PR67).
  • Voltage on both VDDA/VDDP approx 5V
  • ACAV present 3.3V and generate as ACIN signal via PR84.
  • Also ACIN signal require for generate PQ19 (PNP-NPN on SC-74 package) so when pin 5 be ON, pin 2 be OFF, then +VAD cross to pin 6 PQ19.
  • When +VAD present, PQ4 be ON via resistor divider PR192-PR228, Though VH28 present if this fet ON make PQ42 be OFF.
  • ACIN signal require to make PQ3 be ON and PQ4 be OFF, then PQ42 be ON and generate +PRWSRC/+VIN



Pull out the PU8 and check all pin out of pad PU8 for shorted, if shorted gone replace PU8.

Note:
  • Need check carefull, also double check for shorted.
  • Don't apply power till short gone.

Hope you understand with my poor grammar
first i found pin17 vh28 shorted with ground i take off the pc151 but the short still exist
i pull out the pu8 and the short gone .

Last edited by mo000; 01-19-2019 at 01:55 PM..
mo000 is offline   Reply With Quote
Old 01-19-2019, 02:11 PM   #18
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

where i can find P2806 ic .
is there any replacement .
mo000 is offline   Reply With Quote
Old 01-20-2019, 12:42 AM   #19
on/off
Badcaps Veteran
 
on/off's Avatar
 
Join Date: Oct 2016
City & State: Forbidden
My Country: Indonesia
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 217
Default Re: pls help help hp dv6-3357sf no light no power .

First find in your local store, or try ebay / aliexpress
on/off is offline   Reply With Quote
Old 01-24-2019, 04:05 AM   #20
mo000
New Member
 
Join Date: Nov 2017
City & State: batna
My Country: algeria
I'm a: Knowledge Seeker
Posts: 19
Default Re: pls help help hp dv6-3357sf no light no power .

finally after 6 days of pain i repair the laptop by change the ic p2806
and the laptop work fine
thanks for everyone helps me specially the member on/off
thank you very much .
mo000 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums © 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 09:06 PM.
Did you find this forum helpful?