Dell 9550 LA-C361P AAM00 Schematics needed

[reddemonic]

board can power up fine, the board has a minor liquid damaged.
some of these components is slightly corroded. i want to replace these parts
i can see the silkscreen of the chips but i need to know the value of these resistors and caps.

does anyone have this schematic.


cheers

[aspenpup]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Did you ever have any luck on finding schematics? I have a Dell 9550 that is out of warranty by just a couple of month. System will briefly turn on but then turn off. Can not get past POST, no logo splash. Unable to get into Bios (F2) or diagnostics (F12). Could just be bios issue but already replaced battery. I would like to check voltages and see if there is any physical problems. I actually suspect a bios issue, visual inspection looks good. Would really like to see some schematics

[Cipher]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Hi,

I have the schematics see attached file. I'm issues with this board too really looking to get some insight what you guys are getting in readings around.

Im getting not getting any voltage at all from source, gate and drain I am thinking about replacing them as it just doesnt make any sense why dont get voltage see attachment.

Would love to hear your thoughts.

[Duranitron]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Hi,

I have the schematics see attached file. I'm issues with this board too really looking to get some insight what you guys are getting in readings around.

Im getting not getting any voltage at all from source, gate and drain I am thinking about replacing them as it just doesnt make any sense why dont get voltage see attachment.

Would love to hear your thoughts.

probably the mosfets are shorted to ground. place one prod of your multimeter to ground and poke the mosfets to see if it is shorted be sure to disconnect the battery and power adaptor first. hope this helps..

[Duranitron]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

board can power up fine, the board has a minor liquid damaged.
some of these components is slightly corroded. i want to replace these parts
i can see the silkscreen of the chips but i need to know the value of these resistors and caps.

does anyone have this schematic.


cheers

I'm just suggesting if the mobo is working fine just clean it. don't try to keep it nice looking. this is one of many techs and hobbyist motto "if its not broken don't fix it". hope this helps..

[Duranitron]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Did you ever have any luck on finding schematics? I have a Dell 9550 that is out of warranty by just a couple of month. System will briefly turn on but then turn off. Can not get past POST, no logo splash. Unable to get into Bios (F2) or diagnostics (F12). Could just be bios issue but already replaced battery. I would like to check voltages and see if there is any physical problems. I actually suspect a bios issue, visual inspection looks good. Would really like to see some schematics

try a known power adapter first that works, have you done the short circuit test? probably there is a short in the board.. most likely mosfets in the powersupply section. try to visual check first some mosfets and fuse burns or burst try to check the IC that is connected to the mosfet. try this place one of your multimeter prods to ground and poke the other one to the suspected parts. hope you find the fault.. hope this helps..

[alas3376]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

board can power up fine, the board has a minor liquid damaged.
some of these components is slightly corroded. i want to replace these parts
i can see the silkscreen of the chips but i need to know the value of these resistors and caps.

does anyone have this schematic.


cheers

these are probably 12uF 25V capacitors. but firstly, you need to clean them to make sure the contacts are ok

[Cipher]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

I checked those mosfets I mentioned their not faulty its just that the gate voltage of pq213 is 20v so it cant saturate source-drain.

The issue I now looking at is that B+ voltage is 13.5v all across the board does anyone know where B+ gets generated off.

I really appreciate anyone helping me out on this.

[SMDFlea]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

PU300 - BQ24777RUYR ,pin 27 .

[Comrad_SU]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Hi,

I have the schematics see attached file. I'm issues with this board too really looking to get some insight what you guys are getting in readings around.

Im getting not getting any voltage at all from source, gate and drain I am thinking about replacing them as it just doesnt make any sense why dont get voltage see attachment.

Would love to hear your thoughts.

Thank You Bro!

[mitchw]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Hey, I need boardview for this board, trying to repair liquid damaged board with some components missing

[mitchw]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Hey, found a .BRD file online, but it is 68 MB size (extracted). My boardview software won't open it.

Anyone knows what program I should use?

[Rezistor]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Hey, found a .BRD file online, but it is 68 MB size (extracted). My boardview software won't open it.

Anyone knows what program I should use?

Allegro Free Viewer 17.2

[AL._.EX]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Boardview

[its service]

Re: Dell 9550 LA-C361P AAM00 Schematics needed

Thx bro