Xerox Phaser 3635MFP Service Manual

Also see for 3635MFP - Phaser B/W Laser: Features Brochure & specs User guide User guide Quick use guide

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Xerox Phaser 3635MFP Service Manual Manual pdf 99 page image

3-3Phaser 3635MFP IQ1Image QualityDraft 4IQ1 Image Quality Entry RAPUse this RAP to determine the source of an image quality problem.Initial Actions• Check the condition of the paper. Do not use incorrectly cut paper, damp paper, paperwith rough edges, badly drilled paper, paper with wrapper wax or glue. Paper and mediashould be stored flat, enclosed in wrappers, in a cool dry environment.• Check that the paper is within specifications. Refer to GP 9 Paper and Media Specifica-tions.• Check that paper tray guides are set to the correct paper size.• Check the document guides on the DADF.• Check the original documents for defects.• Ensure that the image adjustment mode selections are those used by the customer.• Check that the machine fans are working, go to the OF3 Air Systems RAP.ProcedureIf necessary, refer to IQ1 Internal Test Patterns for:• A description of image quality defects.• The optimum test pattern to be used to diagnose the defect.• An example of all internal test patterns.If possible, use the customer job to recreate the image quality problem.Enter dC606. Select a suitable test pattern. Select the Features, 1 or 2 sided and paper size.Press Start Test. Go to the relevant RAP:• IQ2 Blank Copies RAP• IQ3 Black Copies or Prints RAP.• IQ4 Blurred Image From the Scanner RAP• IQ5 Vertical Black Lines or Bands RAP• IQ6 Vertical White Lines RAP• IQ7 Light Image RAP• IQ8 Dark Image RAP• IQ9 Background RAP• IQ10 Ghost Images RAP• IQ11 Stains on Back of Paper RAP• IQ12 Poor Fusing RAP• IQ13 Partial Blank Image (Not Periodic) RAP• IQ14 Partial Blank Image (Periodic) RAP• IQ15 Different Image Density (Left and Right) RAP• IQ16 Horizontal Bands RAP• IQ17 Periodic Printing Defects Check RAP• IQ18 DADF Lead Edge Offset RAP• IQ19 Poor Registration RAP.IQ1 Internal Test PatternsTable 1 defines the image defect, gives a description of the defect and identifies the optimumtest pattern to be used.NOTE: There are 19 internal test patterns, but only 7 are unique. Each test pattern is availablemore than one time. Only the first occurrence of a test pattern is shown in Table 1.Table 2 describes the test patterns and the purpose for which they should be used to identifyimage quality defects.Table 1 Image quality defectsImage qualitydefect Description of defectOptimuminternal testpatternBackground Uniform darkening across all the non print areas 1Bands Grey to dark in the light or non-image areas of the print in theprocess direction or across the process direction. See alsonarrow bands.1Beads on print Developer beads in the light or non-image areas of the print. 1, 7, 8Black image A print that is black or grey all over, but has no visible imageof the original document.1, 7, 8Blank image No visible image. 1, 7, 8Blurred image Part or whole of the image has the appearance of being outof focus.1, 7, 8Dark prints Very dark background with a visible image. 1, 7, 8Deletions Areas of the image missing from the print. Deletions may bein the form of white spots, marks, lines, or whole areas oftoner missing from the print.1, 6Displaced andfragmentedimageDistorted images, part images and missing images (scram-bled images). Displaced images.1Light image The image is visible on the print, but with insufficient solidarea density.1Lines Black or white lines across the process direction or in the pro-cess direction. See also the description, displaced and frag-mented image.1, 7Magnification At 100% magnification the printed image differs from the sizeof the image on the original document.7Marks Dark marks in the non-image areas of the print. 1, 7Misregistration The image on the paper is misregistered. 7Narrow Bands Bands across the process direction visible in halftone areas. 1, 4, 5Non uniformity Variation in image quality and density across the print. Seealso uneven density.4, 5Offsetting A previous image that was not removed from the fuser rollduring the cleaning cycle. The image is repeated at regularintervals.1, 5