Broken PHY or ethernet jack?

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Broken PHY or ethernet jack?

Postby mattcallow » Wed Apr 06, 2011 8:05 am

Hi,

I've just started messing around with my web platform after a couple of months on other things.
Strange thing is, I don't seem to be able to get a network link. The link light on my router does not light up when I plug the web platform in.
It has been working fine previously. I went back to the original Microchip demo code, but still not luck.
The enc28j60 seems to be working, as I can read the REVID from it, but when I read the link status it always indicates that the link is down.

Anyone seen anything like this before?

Matt
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Re: Broken PHY or ethernet jack?

Postby mattcallow » Wed Apr 06, 2011 5:02 pm

I've tried several cables and ports on the router.
I'm actually using the cable I had used previously. So I'm pretty sure it's not the cable or the router port.

Matt
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Re: Broken PHY or ethernet jack?

Postby ian » Thu Apr 07, 2011 3:20 am

Hi Matt,

I'm sorry about the issue, I've been trying to think of anything to suggest.

How does the soldering look around the jack pins? Are the LINK and ACT LEDs soldered well and working (as much as possible), they set the duplex depending on source/sink current.

Maybe the ENC28J60 chip is damaged. I can send a replacement or swap it out for you.
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Re: Broken PHY or ethernet jack?

Postby mattcallow » Thu Apr 07, 2011 7:54 am

Hi Ian,

I tested the LEDs by changing the PHLCON register to make them flash. They are working OK.
I've also dumped the ENC28J60 registers, and I can see that it's set for half duplex, I just don't get a link!
It seems strange that everything else in the ENC28J60 works. Maybe the output drivers are faulty?
Is there any way I can test this?

Matt
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Re: Broken PHY or ethernet jack?

Postby ian » Thu Apr 07, 2011 9:02 am

Sounds like you did a complete check. If the contacts in the jack look ok, and the PCB/solder joints look ok, then I would also guess issues with the PHY driver. I don't know how they could be tested, but I'm happy to swap it for you.
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Re: Broken PHY or ethernet jack?

Postby mattcallow » Fri Apr 08, 2011 1:35 am

I also checked (and re-soldered) the ethernet jack. It all looks fine.
I guess it must be the ENC28J60.
If you could send a replacement, that would be fantastic. (I've ordered some chipquik to remove the existing IC)

Matt
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Re: Broken PHY or ethernet jack?

Postby ian » Fri Apr 08, 2011 2:00 am

Cool, please PM me an address and I'll send it out today.
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Re: Broken PHY or ethernet jack?

Postby mattcallow » Sun Apr 24, 2011 7:45 pm

ian wrote:Cool, please PM me an address and I'll send it out today.

Ian, thanks for the replacement (and the breakout board, which was an unexpected surprise)
After 2 attempts at replacing the chip (I've not down much SMD work before), the network on my Web Platform is working again - yay!
BTW, I'm currently working on a contiki port for the web platform.

Matt
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Re: Broken PHY or ethernet jack?

Postby ian » Mon Apr 25, 2011 12:48 am

Great job with the replacement, I'm glad everything got there ok.

I try to fill every envelope to the 20g limit of a stamp (or 50g for 2). Make the post office work for their money.
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Re: Broken PHY or ethernet jack?

Postby mattcallow » Mon Apr 25, 2011 5:20 am

ian wrote:I try to fill every envelope to the 20g limit of a stamp (or 50g for 2). Make the post office work for their money.

Good idea. May as well get your money's worth.
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Re: Broken PHY or ethernet jack?

Postby brainbug » Sat Oct 21, 2017 8:41 am

Hi,

i was having the same problem, not getting a link and the init code for the network stack hanging,
and fortunately found this post! Replacing the controller with a new part fixed things for me aswell!
It was my first time replacing and SMD part and this worked pretty well:
going over each side of the chip with some flux gel and desoldering braid, going over one of the sides again
and then carefully prying up the legs one by one. Then bending it over to the other side and applying some heat where
it was still attached, it came off easily.
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