Chapter 1414-4F-14-2Field RemedyWhen the symptom occurs, re-insert all connectors on the main controller PCB. If the symptom still occurs, replace the main controller PCB with a new one.FM2-4550 Main Controller Board14.2.1.2.3 Fogging caused by original-to-copyboard glass gap/ lines caused by original with creases (especially book)0010-6729iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 / / / / /[ Case in the field ]DescriptionIn the field, when a book or an original with creases was copied, the shadow caused by the gap between the book and the copyboard glass or the creases ofthe original was recognized as fogging, and as a result, the contact image sensor was replaced with a new type one to improve the symptom. When thesymptom is pointed out, follow the procedure below.Field Remedy1. Take notes of the CIS label value (MTF-MG) affixed on the side of the new type contact image sensor unit (FL2-3000).Note: Regarding the new type contact image sensor unit, its CIS label describes the parts number "FL2-3000-xxx", too.2. Replace the contact image sensor unit with a new type one.3. In service mode [COPIER > ADJUST >CCD > MTF-MG], input the CIS label value that was taken note of in Step1.4. In service mode (Level 2) [COPIER > OPTION > BODY > CCD-TYPE], input "1".5. Place more than 10 sheets of white paper (that has the highest level of whiteness among all types of paper the user uses) on the copyboard glass, and thenperform the CIS white level adjustment in service mode [COPIER > FUNCTION > CCD-ADJ].6. When the DADF-M1 is used, place the paper the user often uses on the copyboard glass, and then perform the ADF white level adjustment in service mode[COPIER > FUNCTION > CCD > DF-WLVL1/2].7. Hold down the control panel switch for more than 3 sec. > press [Start] on the LCD > turn the main power switch OFF following the instruction on theLCD > wait 10 sec. or more > turn the main power switch ON again.FL2-3000 Contact Image Sensor Unit14.2.1.3 Uneven Density14.2.1.3.1 Uneven/coarse image occurs at 59mm intervals in sub scanning direction: iR3570/iR45700010-4141iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 / / / / /[ Inspected by Canon Inc. ]Description
