Re: UMAX Astra 1200S lamp question

Warren Early (earlyw@sphinx-group.com)
Thu, 25 Feb 1999 15:58:31 -0800 (PST)

> > > When I connected power (and nothing else) to the scanner, the imaging
> > > lamp came on. When I connected the SCSI cable, the lamp stayed on.
> > > I've tried SCSI bus resets, scanning images, setting every available
> > > option in xscanimage and scanimage, and never has the lamp been off.
> > > The lamp is still shining under the scanner cover to this day.
> >
> > Yep, for me too.
>
> I have a Tamarack 1200C, and according to the docs (I wrote the
> driver), the lamp cannot be turned off.
>
> My guess is that they tried stuff like "turn the lamp off after 10
> minutes of inactivity" and either decided that it would prolong the
> life of the lamp, and that it would cost them business in lost sales
> for replacement lamps, but more likely the extra power-cycles for the
> lamp would wear it down faster than just leaving it on.
>

I know that Microtek leaves the lamp on so that the scans remain
consistent for calibration purposes. A cold tube emits less light and of a
different color than one that's fully warmed up.

> > > Is this normal? Are the Windows drivers able to turn the lamp off?
> > > Is the hardware incapable of turning the lamp off? Is it some kind of
> > > funky solid-state lamp with a 100K-hour lifetime?
> >
> > We can hope. I generally leave the power off except: during
> > boot time, when the BIOS and OS are looking for the scanner,
> > and when I'm using it.
>
> If you're using Linux, just leave it off, until you need it.
>
> #!/bin/sh
> echo "scsi add-single-device 0 0 $1 0" > /proc/scsi/scsi
>
> use this script with the SCSI ID of your scanner as the argument to
> have it detected when you want to use it....
>
> > Well, I can't say it's "normal" or "intended", but I can say
> > that mine and yours are acting the same way.
> >
> > Now, if I could only get SANE to FIND the darn thing. (I have
> > been less lucky than you in getting SANE to work)
>
> Tip: Edit dll.conf, and remove all other backends.
>
> Roger.
>
> --
> ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
> *-- BitWizard writes Linux device drivers for any device you may have! --*
> * Never blow in a cat's ear because if you do, usually after three or *
> * four times, they will bite your lips! And they don't let go for at *
> * least a minute. -- Lisa Coburn, age 9
>
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