Hi, Arno.
On Nov 8, 7:50, Arno Kletzander wrote:
> at first: Is it okay to continue our mailing this way (directly mailing
the
> messages, only CCing to Classiccmp.org? It's because I'm on the Digest
and it
> has been arriving at about 4 P.M. local time the last few days, which is
too
> late for me to stay in school and pick it up the same day (alas, don't
have
> Internet at home yet).
Yes, that's OK. I don;t know if you'll necessarily get a faster response,
but it's worth a try :-)
> No, nothing on that board. There are only two 2pin jumpers, one for
printing
> out the adapter's status page and one for resetting the NOVRAM contents
to
> the factory defaults. I think I've already seen what you mean on other
network
> devices (six or so 3-pin jumpers, the movable parts sometimes joined in a
> blue plastic tray).
OK. It's probably a little more modern than I thought, then. I guess it
senses that it is receiving link pulse on the 10baseT interface and uses
that, otherwise it uses the AUI.
> >>But no signs of overheating etc. on the PCB...
>
> OK, I admit that was only for VISIBLE SIGNS. The LM2577-T12 (switching
> voltage regulator in TO-220 package) next to the AUI port becomes
TERRIBLY hot
> even after < 10 minutes of running the printer.
> I assume it's used to generate the voltage the Transceiver uses? But the
> power light (on the transceiver) is on as long as the printer is...
That may not be a problem. The external transceiver (and the internal one)
use an isolated supply to drive the electronics on the cable side. Those
little converters sometimes get warm. I'm not familiar with that specific
chip, though. It probably shouldn't get very hot.
> And even worse...the DATA LED does no longer blink when there's traffic
on
> the Ethernet...
Oh dear, a bad sign, I fear.
--
Pete Peter Turnbull
Network Manager
University of York
Received on Thu Nov 08 2001 - 16:54:46 GMT