7. White lines every 1mm pitch in halftone areas
Possible causes:
• CIS defective
Case 8: Dark image density at CIS1, CIS3, and CIS5.
Possible cause:
• The machine is near a window and sunlight is hitting the CIS unit
• The light shield have been removed or is tucked inside the machine.
• This light shield prevents light from entering the scanner unit.
6. Troubleshooting
736
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