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FAX 880 (MV74) Manual de Servicio
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November 28th, 1995
TROUBLESHOOTING COPY QUALITY TROUBLESHOOTING
6.1.2. Black Copies Possible Cause (Scanner) � The contact image sensor is defective. Action: 1. Check the connection between the IJC (CN10) and the contact image sensor. 2. Replace the contact image sensor. 6.1.3. Dirty Background Possible Cause (Scanner) � Scanner shading correction error or wrong threshold. Action: 1. Clean the shading plate.
6.1.4. Uneven Image Density Possible Cause (Scanner) � Dirty exposure glass � Dirty white plate on the ADF � Partial LED array defect � The contact image sensor is defective Action � Clean the exposure glass of the image sensor and the shading plate. � Replace the image sensor.