14 June, 2002
SYSTEM FEATURES
6-53
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Settings for Vertical Black Line Detection
User Parameter settings performed by the customer or customer engineer
determine whether 1) vertical black lines are corrected, and whether 2) a warning is
issued every time a vertical black line (abnormal pixel in the scan line) is detected
before scanning an original.
The machine defaults are set to 1) correct vertical black lines and 2) issue a
warning when a vertical black line (abnormal pixel in the scan line) is detected.
These settings depend on User Parameter Switch 20 bit 4 to enable or disable the
detection, and User Parameter Switch 20 bit 7 to enable or disable the warning
message. The default settings for both vertical line correction and the issue of the
warning are both “1” (On).
For details about how to change this setting, refer to the “Key Operator Settings -
User Parameters” section in the
Operating Instructions - Advanced Features
manual for the machine.
Vertical Black Line Warning Message
When a vertical black line occurs, a message appears on the operation panel and
warns you to clean the scanner when:
•
Pixels of abnormal width that cannot be corrected are detected three times
consecutively.
•
Pixels of abnormal width that can be corrected are detected 10 times
consecutively.
The scanning job is not interrupted when this message is displayed. If paper dust is
the cause of the problem, for example, the following sheets of the original could
remove it from the scanning area.
To release the error, just press the OK button.
The exposure glass and area around the scanning line should be inspected and
cleaned as soon as possible after the “Scanner Needs Cleaning” warning appears.
In regard to the operation of vertical black line correction:
•
Scanning originals is slightly slower with vertical black line detection switched on.
•
Vertical line detection is executed only once, immediately before scanning the
first page of the stack.
•
The vertical line correction warning is displayed in the LCD only. No lamp
indicator or sound warning is issued.
•
After the original is set, vertical line detection is done by the CIS reading the
surface of the white plate above the scan line. The white plate is not read
immediately due to the slight delay required for the CIS to illuminate fully.
