ASUS RT-AX88U router DEAD

[josweet]

Hi Can anyone help identify this component pls

The Asus RT-AX88U router is dead & fault finding brings it to a DC to DC convertor. 3.3v goes in, but nothing comes out. The IC is marked "3002 0ST1"

There is a 2nd working small IC marked "3001 0gt1" that converts 3.3v to 1.8v, both power separate CPu's on the board.

I have also searched for a schematic for it, to no avail.

[CapLeaker]

Re: ASUS RT-AX88U router DEAD

Check the if the output is shorted to gnd via the caps too.

[waveslinger]

Re: ASUS RT-AX88U router DEAD

I have the same model router with exactly the same fault, please let me know if you manage to fix it or find any info on the dc-dc chip, coil or caps.
It's a pain to work on, requiring lots of back heat to remove the SMD components, mine has about 92ohms to ground on the output of that circuit.
Thanks
Martin

[mikochem]

Re: ASUS RT-AX88U router DEAD

Hello,

I'm trying to repair the same model but in my case it appears to be a different fault...

https://www.badcaps.net/forum/showthread.php?t=113203

Would someone with the same router be so kind as to help me identifying U613 ? I'd like to confirm whether U613 is the same as U614 on the PCB or not.

If I can resurrect that thing I'll definitely keep you posted.

Cheers,

Michael

[waveslinger]

Re: ASUS RT-AX88U router DEAD

Hi Michael,
On my board, U613 and U614 are both 0Q=13V
Thanks,
Martin

[jiroy]

Re: ASUS RT-AX88U router DEAD

It might not be the same case as yours , but still , it occurred many times with me lately . The adapters , although measuring the right voltages , depending on models , but it seems at load they were failing , in amperage of course . On trying another ones , routers would work smoothly .

[mikochem]

Re: ASUS RT-AX88U router DEAD

Hi Michael,
On my board, U613 and U614 are both 0Q=13V
Thanks,
Martin

Thanks a lot Martin !

[matusalens]

Re: ASUS RT-AX88U router DEAD

Hi I have one RT-AX88U Dead, but in my case is caps of L1126 area, after remove 5 caps and test with energy power, my router come back to life.

Someone can please tell me caps specs??

[Lasermi]

Re: ASUS RT-AX88U router DEAD

Hi there to all,
In my case, a cap on the L1126 area was clearly cracked. Router was dead, apparently the power supply was shorted. I removed it and router came back to life. Unfortunately I don't have the specs but I'm planning to replace it with a 4.7uF 50V 1206 X7R. Since I could see many other caps in parallel and the router already works without it, I can only guess it's not that critical. I will post my results.

[RedDragon9]

Re: ASUS RT-AX88U router DEAD

I also have a ax88u with no power. I'm getting 19v coming in but seems like the DC convertors are no being enable as I get no output. I am getting a half volts on the LEDs and 1V on U24. Any help please

[poster1]

My ax88u has U24 chip burned. 8 pin SMD, markings are unreadeble. Can any1 help me indentify this chip? Or post a good quality photo of it?

[Yang Sail]

My ax88u has U24 chip burned. 8 pin SMD, markings are unreadeble. Can any1 help me indentify this chip? Or post a good quality photo of it?

My AX88U also failed, and I see that the model number for the U24 is 1L=12T for your reference.

I would also like to ask how many volts is the output of the IT76630M chip at U3 (I have a faulty R1 resistor) and I need to determine the value of the R1 resistor.