[sane-devel] How to reset an HP ScanJet 3200C ?

[Francesco Poli]

Hi all!

I have an HP ScanJet 3200C parallel port scanner, which seems to
work with the umax_pp backend.
I am using Debian GNU/Linux (testing branch), which includes
SANE version 1.0.19.

During a scan with

  $ scanimage -d umax_pp --format tiff --mode Color --resolution 300 > out.tiff

I accidentally issued the following command:

  # scanimage --help --device-name umax_pp

on another terminal and got the following errors:

  [umax_pp_low] PS2registerRead: found 0x20 expected 0x0 (umax_pp_low.c:7554)
  [umax_pp_low] sendData failed  got 0xE8 instead of 0xC0 or 0xD0 (umax_pp_low.c:5564)
  [umax_pp_low] Blindly going on .....
  [umax_pp_low] sendWord failed  got 0xE8 instead of 0xC0 or 0xD0 (umax_pp_low.c:4711)
  [umax_pp_low] Blindly going on .....
  [umax_pp_low] Unexpected reg19: 0xE8 instead of 0xC0 or 0xD0 (umax_pp_low.c:5611)
  [umax_pp_low] cmdSetDataBuffer(initbuf) failed ! (umax_pp_low.c:7812) 
  scanimage: open of device umax_pp failed: Invalid argument

Meanwhile, the terminal where the scan was going on spat out many other
(more or less) similar errors, so I thought
"oh no! I screwed my scan up! oh well, let's restart from scratch..."
and killed the scanimage process with [Ctrl+C].
Worse!  I got a great number of errors identical to

  [umax_pp_low] ppdev ioctl returned <Invalid argument>  (umax_pp_low.c:4377)

and pressed [Ctrl+C] again to stop them.

At that point, the lamp was about halfway in the bed and there it
stayed.  I thought it would be brought back to the ready position
at the next scan, so I restarted from scratch:

  $ scanimage -d umax_pp --format tiff --mode Color --resolution 300 > out.tiff

The lamp was *not* reset to the ready position: it went on and, after
some time, the scanner started to make a scary clicking noise.
Ahhh! I unplugged the scanner.
OK, after replugging the scanner, the lamp was not reset to the ready
position; if I start another scan, I get the noise again and have
to unplug the scanner.

I searched the web, the SANE documentation, the SANE mailing lists,
but failed to find a command to force the lamp to go back to the
ready position!
This scanner has no hardware power button.
I already tried the procedure described at
http://umax1220p.sourceforge.net/tips.html
but unsuccessfully (the only difference is that I didn't use any printer).

Can someone please help?
How can I recover my currently unusable scanner?


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..................................................... Francesco Poli .
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