GRAPHTEC CS2000 Service Manual page 119

Cause
The scanned drawing
has undesired black
lines.
The scanned drawing
has undesired white
lines.
Part of the scanned
drawing is missing
(the scanned drawing
is horizontally
compressed).
Part of the
scanned drawing is
overlapped.
The image quality is
poor.
The PC does not
detect the scanner.
CS2000-UM-251-9370
Checkpoint
Clean the scanning glass and replace if
necessary.
Confirm that shading (undesired line removal)
has been properly performed.
Check the document hold-down unit for
stains.
Check whether the problem persists after
cleaning and adjustments.
Check the scanning glass for dust and
damage.
Confirm that shading (undesired line removal)
has been properly performed.
Confirm that the sensor X overlaps and Y
offsets are appropriate.
Confirm that the sensor X overlaps and Y
offsets are appropriate.
Check whether the scanning glass is dirty.
Confirm that the image resolution is
appropriate.
Confirm that the scanner has been turned
on.
Confirm that the PC has detected the SCSI
card properly.
Check the cable for broken wires, shorting,
and bent connector pins.
Confirm that the cable is 3 m or shorter.
Confirm that the daisy-chain settings are
appropriate.
Confirm that the power supply for the
scanner unit functions properly.
Confirm that the recommended SCSI card is
used.
Use a PC that correctly detects other
scanners to determine whether the problem
is with the PC itself.
Remedy
Clean the scanning glass and replace if
necessary.
Clean the image sensors.
Perform shading (undesired line removal)
again. If the problem persists, repeat
calibration from the beginning (white
correction).
Clean the document hold-down unit.
Replace the image sensors.
Clean the scanning glass and replace if
necessary.
Perform shading (undesired line removal)
again.
Align the sensor joints.
Align the sensor joints.
Use purified water or alcohol to clean the
scanning glass. (Do not use chemical
solvents.)
Select an appropriate resolution.
Turn on the scanner.
Reattach the SCSI card, set it up, and
reinstall the SCSI driver.
Replace the cable.
Change the cable length.
Check whether the same SCSI ID has been
assigned twice.
Check the terminator settings.
Check the supply voltage and replace the
power supply as necessary.
Correct scanner function cannot be assured
unless the Adaptec SCSI card is used.
Ultra2 or Ultra2W cannot be connected.
Replace the SCSI card.
Replace the main control board.
(Reinstall the boot program.)
11-2
11. TROUBLESHOOTING