OKIDATA DOC-IT3000, Руководство по обслуживанию

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Page: 208
Service Guide DOC-IT3000/4000
Chapter 4 Failure & Repair Analysis
RAP#10 - Scanned Image (Dark Backgrond Density)
RAP 10: Scanned Images with Dark Background Density
START.
The reproduced scanned image is in dark background density.
Check the quality of the original document.
Does the quality of the original document match the quality of the output image?
YES Original is not suitable for scanning. Obtain better quality original.
End of procedure.
NO Check the surface of the hand scanner.
Is the glass surface of the hand scanner dirty?
YES Clean the glass.
End of procedure.
NO Visually inspect the quality of the scanned image as displayed on the PC
monitor.
Is the displayed image also in dark background density?
NO Contact Technical Support.
YES Perform scanner shading adjustment. Refer to Section 3.3 of this Service Handbook.
Has the problem been resolved? YES End of procedure.
NO Replace hand scanner.
Has the problem been resolved?
Continued on the next page.
YES End of procedure.
NO The possible defective assemblies are listed below. Replace in the order listed. 1. Image drum
cartridge
2. High voltage power supply
3. Engine control board
4. Main control board Has the problem been resolved? YES End of procedure.
NO Contact Technical Support.
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