SOLO4K dead....

[rziri]

hi friends,





I have a problem with solo4k... he's dead

only the blue LED is on the front panel..
the IC U114, capacitors C265, C267, C270 and transistor U142 have been damaged


I desoldered the damaged IC because I do not have a new one

my solo does not start after soldering new ones C265,C267,c270


there is no voltage on usb and I don't know why

there is no voltage at the output of the IC U101 .MPEP 8762.

MPEP 8672 it is similar to MPS MP8762

in a typical application of MP8762 works when Enable pin EN is connected to IN through a pull-up resistor

In My solo4k is not connected to anything


I don't have a schematic or photos of the motherboard and I do not know if it should be like that



anyone help? )))))


//I'm sorry for my English...

 

[Matrix10]

http://www.monolithicpower.com/DesktopModules/DocumentManage/API/Document/GetDocument?id=748

you have QFN-16 package 16 pins

The output voltage of this IC is below the IC itself.
Is it well connected?

That's pin 15 and 16
under the IC body.

Of course you must first check if you have the input voltage.
I have no diagram,and I do not believe someone has a receiver diagram.
but this pdf file shows enough how this STEP-DOWN CONVERTER works.