[sane-devel] Can't activate transparency unit on Epson Perfection 2450

[Karl Heinz Kremer]

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Is the TPU plugged in? When the scanner works for "normal" scanning,
it should also work in TPU mode. THat the scanner thinks that the
TPU is not active can have a number of reasons:
- TPU is not plugged in
- The TPU is covered by the white background that is required for
scanning off the glass
- The TPU is broken

The name that the scanner reports is OK. The GT-xxxx is an internal
name that is usually (that is with e.g. Windows drivers) not exposed.
Because I don't have two versions of the backend (Japanese, and
rest of the world), I don't distinguish between Perfection-xxxx and
GT-xxxx. GT-9700 is the internal name for Perfection 2540, you got
what you paid for.

Karl Heinz


On Tue, Oct 01, 2002 at 11:11:28PM -0700, Graham Hughes wrote:
> mostang.com seemed to imply this was the right place to ask.
>=20
> So I got my brand new 2450 today, and have been able to make it scan
> images pretty well.  But I bought it for scanning film negatives, which
> requires that the transparency unit get lit up, etc.  Every time I try
> to use --source 'Transparency Unit', say with the following command
> line, which basically worked for someone else on this list:
>=20
> $ scanimage --focus-position 'Focus 2.5mm above glass' --source
> 'Transparency Unit' --film-type 'Negative Film' --brightnexx 0 -x 26mm
> -y 38mm -l 7mm -t 40.5mm --resolution 300 --mode Color --depth 16
> --format tiff > bw.tiff
> scanimage: attempted to set inactive option source
>=20
> Winnowing reveals that --source and --film-type are both inactive and
> nothing I can do seems to make them active.
>=20
> scanimage -L claims that it's a GT-9700, which is a lie but there seems
> to have been some trouble reported earlier on this list with the
> Firewire interface in which this scanner will call itself a GT-9700.
>=20
> sane-backends 1.0.8 and 1.0.9-pre1 on Debian sid.  Kernel 2.4.19 if it
> matters, but since I can get some images out it seems like it shouldn't.
>=20
> I'm sure there's some command to tell sane to let me do this, but I
> haven't been able to find it myself through google.
>=20
> Oh, and the relevant line from my /etc/sane.d/epson.conf:
> usb /dev/usb/scanner0
>=20
> and I have
>=20
> options scanner vendor=3D0x04b8 product=3D0x0112
>=20
> in my /etc/modules.conf.
> --=20
> Graham Hughes <graham@sigwinch.org>
> (defun whee (n e) (subseq (let ((c (cons e e))) (nconc c c)) 0 n))
>=20
> _______________________________________________
> Sane-devel mailing list
> Sane-devel@www.mostang.com
> http://www.mostang.com/mailman/listinfo/sane-devel

--=20
Karl Heinz Kremer                                  khk@khk.net
PGP Key at                 http://www.khk.net/download/khk.asc
EPSON Sane Backend:                         http://www.khk.net

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