Testing a 1488 line driver...

Roy J. Tellason rtellason at verizon.net
Thu Jan 3 09:49:52 CST 2008


On Thursday 03 January 2008 00:48, Gene Buckle wrote:
> > I didn't check for -12V. I'll do that before I go to the effort of
> > pulling the chip and replacing it.
>
> Checked it.  -0.60v  There's a Elpac/TDC CB-3811 DC-DC converter on the
> board that may have died.  I'll pull the board tomorrow and test right at
> the legs of the device.  Thanks for questioning whether or not I'd checked
> the -12v supply!
>
> Finding a replacement is gonna be a stone b*tch I think. :(
> I may have to go to another DC-DC converter that is near the same size
> that I can wire in.

Something might be loading it down, too.  I'd check for that before assuming 
it's bad.

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin




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