<div dir="ltr">thanks for suggestions, on and off list. I'm still trying to troubleshoot this..<div><br></div><div>Does anybody know what level TXD0 (pin 50 on FPGA) pulses should be? I'm getting only 0.6 V and I wonder if there is a short somewhere. The pin next to it, TXD1, has 3.3 V pulses. I've removed the Micrel chip now and will try to solder a new one. I hope nothing is wrong with the FPGA output pin. That would be a real bummer.</div>
<div><br></div><div><br></div><div>73</div><div>Vasiliy</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jun 7, 2013 at 2:18 PM, Joe Martin K5SO <span dir="ltr"><<a href="mailto:k5so@valornet.com" target="_blank">k5so@valornet.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hi Vasiliy,<br>
<br>
Sometimes a reheating of the FPGA and PHY chip pins with a hot air rework tool cures such problems. As the board apparently did work successfully for a while before failing a reheat of the pin connections might prove successful in restoring proper operation for you.<br>
<br>
If a hot air tool is not available then judicious use of a fine tip soldering iron might work but hot air is better if you can manage it as a hot air tool is less likely to produce solder shorts between pins.<br>
<br>
73, Joe K5SO<br>
<br>
</blockquote></div><br></div>