On Fri, Dec 25, 2009 at 8:13 PM, Steven Roberts <> wrote:
> First, just to make a key piece of information Googlable and help
> others, the OP-SWITCHREG that we received is, incredibly, NOT labeled
> for polarity on the input connector. It is diode-protected from
> being hooked up backwards, but this is a one-shot protection method
> that destroys diodes, so it's good to get it right. We spent at
> least an hour examining the board, Googling, and sleuthing about...
> finally finding confirmation in an obscure forum post in which
> someone with the same problem guessed and got it wrong... making lots
> of smoke.
I had a similar problem with the 7260 - I had to look up the PCB
schematics to fins the polarity. In actual fact it is printed on the
PCB, but hidden under the connector itself; at least for the 7260.
> Now for a question. We were surprised to find no sudo utility, and
> while figuring out what to do about that, discovered that it can be
> installed with apt-get. Except... the version of apt-get that came
> on the SD card does not know the current archive structure and will
> not correctly update itself to get that info. Apparently our SD card
> has Debian sarge (obsolete stable) installed, though the current
> version is lenny, with etch in between.
Yes - the Sarge image was created before it was archived, so you need
to update the sources list before updating. Although with a 7800 you
should be able to run a 2.6 kernel such as lenny without issue. I
recommend doing this because its far more up to date.
Look for the lenny image in the mailing list archive; I don't have it off hand.
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