Difference between revisions of "Scanner Testing"

From FreekiWiki
Jump to navigation Jump to search
 
(8 intermediate revisions by 3 users not shown)
Line 1: Line 1:
−
'''Scanner testing''' is done at the scanner testing station in printerland.  This is the desk at the extreme NE corner of the warehouse (next to the windows that are covered with black carboard).
+
<graphviz>
 +
digraph{
  
−
The test computer set up there has both standard and development scanner backends.
+
start [label="Start", shape="box"]
 +
usb [label="Does it have a usb port?"]
 +
other [label="Does it require an\nexternal power supply?"]
 +
recycle [label="Follow Recycling Prep flowchart.", shape="box"]
 +
testing [label="Follow instructions for testing.", shape="box"]
  
−
Most of the scanners we keep are USB, but a few are SCSI. 
+
start -> usb
 +
usb -> other [label="YES"]
 +
usb -> recycle [label="NO"]
 +
other -> recycle [label="YES"]
 +
other -> testing [label="NO"]
  
−
===USB===
+
}
−
#Select a scanner
+
</graphviz>
−
#Locate a suitable power supply
+
 
−
#*Locate the output voltage and amps specifications on the bottom or side of the scanner.
+
'''Scanner testing''' is done at the testing computer in [[Printerland]].
−
#*Locate a power supply that matches the scanner for both its voltage and its amps.
+
 
−
#**Most scanners use a 12V 1.25mA (1,250 A) positive center power supply, but there are many exceptions.
+
#Grab a scanner.
−
#**It can be helpful to mark a 12V 1.25mA power supply as a functioning power supply with which to initially test scanners since this is a common power supply.  After a scanner with 12V 1.25mA specs has been tested and proves to be functioning, test another 12V 1.24mA power supply to keep with the functioning scanner.
+
#Plug the USB cord from the computer into the USB port of the scanner.
−
#Make sure the scanner is unlocked (not all scanner have locks).  If the scanner has a lock, it functions to block the power outlet and must be slid to the side in order to allow a power supply to be plugged in.
+
#Click on Applications > Graphics > Xsane.
−
#Plug the USB cord from the computer into the USB port of the scanner and plug in the power supply.
 
−
#Click on the "K" on the menu bar and scroll up to Xsane.
 
−
#Start xsane.
 
 
#Xsane will either find the scanner and open up a preview pane or it will tell you that a device has not been found.
 
#Xsane will either find the scanner and open up a preview pane or it will tell you that a device has not been found.
 
#If xsane does not find any devices, wait a minute and try again (sometimes the scanner needs to warm up first) .
 
#If xsane does not find any devices, wait a minute and try again (sometimes the scanner needs to warm up first) .
 
#*Close Xsane, unplug the USB and plug it back in and open Xsane again.
 
#*Close Xsane, unplug the USB and plug it back in and open Xsane again.
 
#*If Xsane still finds no device, the scanner is not functioning or Linux does not support the scanner.
 
#*If Xsane still finds no device, the scanner is not functioning or Linux does not support the scanner.
−
#**To make sure that Linux supports the scanner.  Look on sane-project.org in a web-browser.
+
#*To make sure that Linux supports the scanner.  Look on sane-project.org in a web-browser.
−
#***Click on "Supported devices."  Then under "Sane Development (CVS) Version," click on "Ordered by Manufacturer."  Browse the listed devices to ensure that the scanner which is being tested is supported.
+
#*Click on "Supported devices."  Then under "Sane Development (CVS) Version," click on "Ordered by Manufacturer."  Browse the listed devices to ensure that the scanner which is being tested is supported.
−
#***If the scanner is supported, this probably means that the scanner is not functioning.  Mark an "X" over the scanner's ID # and write the number on the Tally sheet under Recycle.  Take the scanner to the Gaylords to recycle it.
+
#*If the scanner is supported, this probably means that the scanner is not functioning.   
−
#***If the scanner is not supported, set scanner aside so that it may be tested on another system.
+
#If Xsane finds a device, it will open a preview pane.  Put in an image to scan. (a magazine cover with both text and pictures is good.)
−
#If xsane find a device, it will open a preview pane.  Put in an image to scan. (a magazine cover with both text and pictures is good.)
+
#*Click preview to scan the image.
−
#Preview and then scan the image.  
+
#*Look for color variations, wavy lines, empty scan lines.  The most frequent problem is blotchy, weird color.  Some scanners miss lines, which will show up as black streaks on the resulting image (best seen at high resolution).
−
#Look for color variations, wavy lines, empty scan lines.  The most frequent problem is blotchy weird color.  Some scanners miss lines, which will show up as black streaks on the resulting image (best seen at high resolution).
 
−
 
 
−
If the scanner fails at any point, record the number and put the scanner in the [[CBM]] bin.
 
−
 
 
−
If the scanner passes the tests, then write "OK" and the highest dpi tested on the label. 
 
−
 
 
−
Tested OK scanners can be sent to the [[Thrift Store]] or used for [[Hardware Grants]].
 
−
 
 
−
===SCSI===
 
−
The following are preliminary notes
 
−
* a scsi card is now installed which will work with scanners
 
−
* use "scsiadd -s" to look for the scanner
 
−
* use "scsiadd -a <id>" to add the device
 
−
* there is probably a way of deleting devices no longer being used
 
−
* check for the device being used (e.g. /dev/sg0)
 
−
* make sure the device is usable by members of the scsi group
 
−
** "chgrp scanner <device>"
 
−
** "chmod 660 <device>"
 
−
** this has already been done for /dev/sg0
 
−
* run xsane and follow similar criteria to USB
 
−
 
 
−
===Parallel===
 
−
These are not being tested at the moment
 
−
 
 
−
 
 
  
 +
If the scanner fails at any point, process as if it had failed the first step of [[Scanner Evaluation]].
  
 +
If the scanner produces a good image, then write "OK" on the ID # sticker and the highest dpi (dots per square inch - resolution) tested on the label. If you don't know the dpi, google the model number and "dpi" to find it. Place the scanner on the outgoing cart.
 +
 
[[Category:Scanners]]
 
[[Category:Scanners]]
 
[[Category:Hardware Testing]]
 
[[Category:Hardware Testing]]
 +
[[Category:Howto]]

Latest revision as of 12:30, 26 June 2008

This is a graph with borders and nodes. Maybe there is an Imagemap used so the nodes may be linking to some Pages.

Scanner testing is done at the testing computer in Printerland.

  1. Grab a scanner.
  2. Plug the USB cord from the computer into the USB port of the scanner.
  3. Click on Applications > Graphics > Xsane.
  4. Xsane will either find the scanner and open up a preview pane or it will tell you that a device has not been found.
  5. If xsane does not find any devices, wait a minute and try again (sometimes the scanner needs to warm up first) .
    • Close Xsane, unplug the USB and plug it back in and open Xsane again.
    • If Xsane still finds no device, the scanner is not functioning or Linux does not support the scanner.
    • To make sure that Linux supports the scanner. Look on sane-project.org in a web-browser.
    • Click on "Supported devices." Then under "Sane Development (CVS) Version," click on "Ordered by Manufacturer." Browse the listed devices to ensure that the scanner which is being tested is supported.
    • If the scanner is supported, this probably means that the scanner is not functioning.
  6. If Xsane finds a device, it will open a preview pane. Put in an image to scan. (a magazine cover with both text and pictures is good.)
    • Click preview to scan the image.
    • Look for color variations, wavy lines, empty scan lines. The most frequent problem is blotchy, weird color. Some scanners miss lines, which will show up as black streaks on the resulting image (best seen at high resolution).

If the scanner fails at any point, process as if it had failed the first step of Scanner Evaluation.

If the scanner produces a good image, then write "OK" on the ID # sticker and the highest dpi (dots per square inch - resolution) tested on the label. If you don't know the dpi, google the model number and "dpi" to find it. Place the scanner on the outgoing cart.

Retrieved from "http://wiki.freegeek.org/index.php?title=Scanner_Testing&oldid=33033"