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ASUS DSL-AC68 Short at DC input power socket

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elektor18

New Around Here
Hi,

I have this router but recently died :(
Probably I won't get schematic for it but worth ask :) Anyone have something? At least buck converters and regulators IC pinout description? I wanted to get an info about IT76930DF chip but I foung only 1 page and it is without pinout description...
Any way, router has shorted input so one of this fellas is suspicious.
 
Honestly I wouldn't waste time trying to make a PCB repair with a replacement power socket, a part that's probably hard if not impossible to find. Just move to a replacement unit -- the AC68U / AC68P are fairly cheap on eBay, or just upgrade to a different model altogether.
 
I wanted to get an info about IT76930DF chip

There are multiple power converter chips inside. Are you sure this the faulty one? I used to repair routers years ago and in most cases the problem was somewhere around passive components or tracks on the PCB. This chip is a 3A output DC/DC converter, something else around it may burn before it burns. Manufacturers use higher output chips in lower power requirement circuits in order to deal with heat generation. Unfortunately, there is very little information on router schematics these days, you basically have to reverse engineer it. As @Trip says, it may not worth the efforts.
 
There are multiple power converter chips inside. Are you sure this the faulty one? I used to repair routers years ago and in most cases the problem was somewhere around passive components or tracks on the PCB. This chip is a 3A output DC/DC converter, something else around it may burn before it burns. Manufacturers use higher output chips in lower power requirement circuits in order to deal with heat generation. Unfortunately, there is very little information on router schematics these days, you basically have to reverse engineer it. As @Trip says, it may not worth the efforts.

Hi Val D.

You were right, passive component failed (cap) but it fixed now. All ICs were ok.
Thank you.
 

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