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Symptom
Black line when using DADF stream reading (Duplex Color Image Reader Unit-C1/Color Image
Reader Unit-C1)
[ Manual-related ]
Description
A black line may occur due to dust on the original when using DADF stream reading.
Cause
Image processing has been improved with this equipment, which applies optimal image processing to the
text part and the photo part respectively. Improvement in image processing, however, highlights
imperceptible dusts at the original scanning position, which may appear as a line on the image. (The
frequency is about 3 out of 10000 originals scanned.)
[Reference] The dusts causing a black line are delivered together with the scanning original; therefore,
there will be no black line with the next original.
Field Remedy
-Text density adjustment when adjusting image density
Service Mode > COPIER > Adjust > AE > AE-TBL, and select [3].
Setting range: 1 to 9 (default: 5)
-Setting of the sharpness level on the image
Service Mode > COPIER > Option > IMG-MCON > SHARP, and select [1].
Setting range: 1 to 5 (default: 1)
-Setting of the halftone processing in text/photo mode
Service Mode > COPIER > Option > USER > PH-D-SL2, and select [2].
Setting range: 0 to 2 (default: 0)
[Note] When performing a field remedy, remind that the scan result changes as follows:
- Scanning of light halftone base is skipped. (It is scanned as white color.)
- Blur text outline due to reduced edge emphasis level with the text
- Photo part appears coarsely