N2+ USB ports no longer working

[servili007]

I have a unit ordered in August of 2020 straight from HK. The USB power rail (VBUS) seems to have totally left the building, as I can't even get a USB powered LED light to respond.

5V rail at the GPIO is fine.

lsusb only contains the linux foundation root hubs, no genesys devices. A powered hub doesn't help the situation.

@odroid this seems like a dead USB hub controller IC?

Code: Select all

test@odroid:~$ sudo lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/2p, 480M
test@odroid:~$ sudo lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[odroid]

Right. The USB hub controller IC GL3523 on the board was dead.

Since our warranty period is 16 weeks, you need to pay two-way shipping cost to repair your near three years old board. Sorry about that.
viewtopic.php?f=53&t=661

Or, if your application can live with a single USB 2.0 port, consider using the micro-USB port with an OTG-to-Host cable something like this.
https://www.hardkernel.com/shop/usb2-0-otg-cable/

[servili007]

Right. The USB hub controller IC GL3523 on the board was dead.

Since our warranty period is 16 weeks, you need to pay two-way shipping cost to repair your near three years old board. Sorry about that.
viewtopic.php?f=53&t=661

Or, if your application can live with a single USB 2.0 port, consider using the micro-USB port with an OTG-to-Host cable something like this.
https://www.hardkernel.com/shop/usb2-0-otg-cable/

I was not making a comment on warranty length or board reliability, I just wanted to understand the issue I was surprised by the failure since this unit is a headless server with a single usb device connected and sits on a shelf where it isn't touched.

A few follow-up questions:

What is your engineer's opinion on the difficulty of replacing the GL3523 via hot air rework if I'd like to attempt it myself?

Is there an additional repair cost in addition to the two way shipping if I do send it back?

There were some N2 board revisions to address stress to the GL3523. Are any mods performed to repaired boards to approximate these changes?

Thank you

[mctom]

If you have some experience of replacing QFN package ICs, it must be easy.

Our labor cost of replacing the GL3523 IC is a few dollars including a new IC.
But if the USB root hub in the SoC(S922X) is damaged, it will be a totally different story.
Because the SoC is glued with epoxy, we can't replace it.
Therefore, in worst case, we can't repair your board.

The PCB revision of 3.3Volt power-rail isolation was applied from early '2021.
But the power-rail trace exists in inner layers, it seems to be almost impossible to implement a simple mod.
8-layer PCB modding is quite difficult and very expensive.

We've shipper over 200,000 N2 boards in the past few years.
There were about 0.1% of USB failure issues user reported before applying the PCB design change.
After changing, the failure rate seemed to dropped to 0.05%. But it is still existing.

BTW, what is your production date number of your board label showing?
https://wiki.odroid.com/odroid-n2/hardw ... lot_number

[servili007]

BTW, what is your production date number of your board label showing?
https://wiki.odroid.com/odroid-n2/hardw ... lot_number

Label shows 2006

[odroid]

It was made in June 2020.

[servili007]

It was not a beginner level job given the density of the pins, but the Genesys chip has been replaced, and I now have functional USB ports again.

Code: Select all

test@odroid:~$ lsusb
Bus 002 Device 002: ID 05e3:0620 Genesys Logic, Inc. USB3.1 Hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
test@odroid:~$ lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M

[zyssai]

...

Hi.
Is there a way to know what IC is damaged?
I can buy an N2 with dead USB ports for a few bucks, I just need to know if GL3523 is faulty.
To confirm, is it U26 ?

[zyssai]

If USB 3.0 host ports are not working, U26 or U12 might be damaged.
If U12 output voltage is steady 5Volt, U26 GL3523 is faulty very likely.

[zyssai]

If USB 3.0 host ports are not working, U26 or U12 might be damaged.
If U12 output voltage is steady 5Volt, U26 GL3523 is faulty very likely.

Hi odroid.
It seems U26 is damaged.
I found QFN76 GL3523-OTY10 and OTY30.
Cannot find difference between them.
Do you know which one is it?

[mctom]

OTY is their symbol of QFN76 package, and I'm just guessing that "30" is an updated version of "10". The latter is removed from the manufacturer's website, so you probably want "30". But I'm not completely sure, @odroid will know for sure.

[odroid]

We can check the suffix early next week since it is already Friday evening hear Korea.

[zyssai]

OTY is their symbol of QFN76 package, and I'm just guessing that "30" is an updated version of "10". The latter is removed from the manufacturer's website, so you probably want "30". But I'm not completely sure, @odroid will know for sure.

Thanks. I don't think this really matter but it's better to ask
It seems there is majority of OTY30 so you're probably right.

We can check the suffix early next week since it is already Friday evening hear Korea.

Thanks a lot. I scratched marking while removing it and forgot to take picture before.

[mctom]

Here is someone else's picture. Looks like there is "30" in the marking, but could mean anything.

viewtopic.php?p=339071#p339071

[zyssai]

Here is someone else's picture. Looks like there is "30" in the marking, but could mean anything.

viewtopic.php?p=339071#p339071

Thanks that's interesting, as I've seen that OTY10 have marking code ending with 10.
This N2 is rev 0.5 so I don't know if previous revisions used OTY10 or 30. I'll check my others N2 this weekend to compare.

[ruppi]

It's a minor chip revision change with some specifications related to USB 3.1, so I believe it's okay to use anything whether it's 10 or 30.

[zyssai]

Thanks. I managed to read marking code of the one I removed on rev 0.5, it seems to be OTY20.
I ordered OTY30. Fingers crossed.