Troubleshooting - GRAPHTEC CS2000 Service Manual

11. TROUBLESHOOTING

Cause
Lamps on the control
panel remain unlit.
The document is not
scanned, although
it is moved to the
scanning position.
The document is not
transported properly.
The document is
not automatically
returned when the
scan is complete.
The scanned data is
completely black.
CS2000-UM-251-9370
Checkpoint
Confirm that the power switch has been
switched on.
Confirm that the power cable is properly
connected.
Confirm that the cable is properly connected
to the control device.
Confirm that the power outputs (+24 V, +5 V,
+3.3 V) are appropriate.
Other
Confirm that the PAPER LED is lit.
Confirm that the SCSI cable is properly
connected.
Confirm that the appropriate SCSI-ID has
been specified.
Confirm that the parameters on the SCSI
host side are set properly.
Confirm that the SCSI cable is properly
connected within the scanner.
Confirm that the appropriate model has been
specified.
Other
Check for foreign objects in the document
scanning section.
Confirm that the roller rotates when you
press a control key.
Confirm that the feed motor is running.
Confirm that +24 V is output.
Other
Confirm that "Front" is selected for "Paper
Control" in Scanning Master 21+.
Confirm that the document is properly fed
back.
Confirm that an appropriate white correction
value has been specified.
Confirm that the image sensor cables are
properly connected.
Confirm that the image sensor LEDs are lit.
Confirm that an appropriate value is specified
for "Intensity (Brightness)" in Scanning
Master 21+.
Remedy
Switch on the power switch.
Connect the cable properly.
Connect the cable properly.
Check the power supplies and replace if
necessary.
Replace the control boards.
Replace the main control board.
Check the document detection photosensor.
Connect the cable properly.
Set SCSI ID switches properly.
Specify the appropriate parameters.
Connect the cable properly.
Use Scanning Master 21+ to specify the
correct scanner model.
Replace the main control board.
Detach the document hold-down unit and
remove foreign objects.
Check for anomalies around the control
boards.
Check for anomalies around the motor.
Check the power supply and replace if
necessary.
Replace the control boards.
Replace the main control board.
Select "Front" for "Auto Eject."
Check for anomalies around the paper feed
section and the motor.
Perform shading (white correction).
Confirm that the image sensor cables are
properly connected, with no broken wires.
Check the +5 V power supply and replace it
if it is faulty.
Replace the main control board.
Replace the image sensors.
Adjust "Intensity (Brightness)" in Scanning
Master 21+.
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11. TROUBLESHOOTING