CANON gp405-10 free download

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Service Bulletin COPIER Issued by Canon Europa N.V. Model : GP405/335 No.: GP405-010 (FF-T01-J7-000028-01) DATE: 10.09.99 Location : SERVICE MANUAL (FY8-13FV-000) Subject : UPDATING IMAGE BASIC ADJUSTMENT PROCEDURE Reason : The descriptions for the "Image Basic Adjustment Procedure" found on p. 14-3 of the Service Manual (FY8-13FV-000) are not adequate, requiring modification. Reference: In the case of a digital copier, the following mechanisms are employed to enhance the reproduction of images: 1. edge emphasis processing 2. density processing As a result, the overall density of images tends to appear higher (darker) when compared with the density of images produced by an analog copier. Details : For specific changes, see the pages that follow. -1/7- GP405-010 1 Making Initial Checks Conditions for Making Image Adjustments Output Condition Using the NA3 Test Chart, make 2 copies in the following Execute `roller cleaning', which is under 1. Be sure to use copy paper fresh out of package. `ADJUSTMENT/CLEANING' of user mode. F value = 5 mode: (Moist paper will make evaluation of image quality 1. text mode Reference: difficult.) Reference: At the optimum density, the copy should barely Execute cleaning for the following: 2. Be sure to use copy paper with a high degree of show gray scale No. 10. 1. Primary charging roller whiteness. 2. Transfer charging roller 3. If possible, be sure to use A3 paper.