Asus X553MA - What channels is first two mosfets?

[ktmmotocross]

Hello.
Have this Asus X553MA that dumbass custommer desolder first two mosfets and now he want to repair it, but dont know what channel was them. As schematic is not available i cannot check it.


Can somebody check it for me? Or upload a HIRES photo?

[ktmmotocross]

Re: Asus X553MA - What channels is first two mosfets?

sory for bothering u guys. i allready found a boardview here on forum so now i know they a N-channel

[SMDFlea]

Re: Asus X553MA - What channels is first two mosfets?

ODD number MOSFETs are considered to be P-Channel
EVEN numbered MOSFETS are usually N-Channel.

(Always better to double check with the datasheet .)

http://mayohardware.blogspot.com/201...g-mosfets.html

[ktmmotocross]

Re: Asus X553MA - What channels is first two mosfets?

dont have schematic, but on boardview in its description is print n-channel and they are the same
charging ic is BQ24735 and in its datasheet example diagram shows two n-channel mosfets

I found that on resistor divider is resistor badly soldered. I have ACDET 3,25V and must be max 3,15. so i think custommer changed one of the resistor but with bad walue. must check it

[ktmmotocross]

Re: Asus X553MA - What channels is first two mosfets?

desolder that badly soldered resistor and shows 100k. in boardview is 115k. found 120k on some board, replace it and have2.75V on ACDETand 19V after first two mosfets.

start it, but no picture on screen, only on external. on screen have 19V and two 3,3V so must replace lcd to check it. but not now. i was driving for 4 hours and deserve a hot bath :-)