Canon iR3570 Series, Service Manual

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Contents
Contents
14.1 Making lnitial Checks ................................................................................................................................................14-1
14.1.1 Site Environment ..................................................................................................................................................................... 14-1
14.1.2 Checking the Paper .................................................................................................................................................................. 14-1
14.1.3 Checking the Placement of Paper ............................................................................................................................................ 14-1
14.1.4 Checking the Durables............................................................................................................................................................. 14-1
14.1.5 Checking the Periodically Serviced Items ............................................................................................................................... 14-1
14.1.6 Checking the Units and Functional Systems ........................................................................................................................... 14-1
14.1.7 Others....................................................................................................................................................................................... 14-2
14.2 Troubleshooting .........................................................................................................................................................14-2
14.2.1 Image Faults............................................................................................................................................................................. 14-2
14.2.1.1 Blank Image ................................................................................................................................................................................................14-2
14.2.1.1.1 Blank image/Toner is not supplied: Because pin of toner sensor connector for developing assembly is bent...................................14-2
14.2.1.2 Foggy Image................................................................................................................................................................................................14-2
14.2.1.2.1 When copying book original, fogging/shadow occurs on output image.............................................................................................14-2
14.2.1.2.2 Faulty image (fully fogged image) occurs in copyboard-glass scanning, stream reading, and FAX transmission ............................14-3
14.2.1.2.3 Fogging caused by original-to-copyboard glass gap/ lines caused by original with creases (especially book) .................................14-4
14.2.1.3 Uneven Density...........................................................................................................................................................................................14-4
14.2.1.3.1 Uneven/coarse image occurs at 59mm intervals in sub scanning direction: iR3570/iR4570 .............................................................14-4
14.2.1.3.2 Distorted image/skewed image occurs around 45mm from trailing edge after attaching new type compression spring to rear side of
registration roller .............................................................................................................................................................................................14-5
14.2.1.3.3 White dots on black solid image/sandy image: Occurs even after executing "D-GAMMA" at time of replacement of drum unit...14-5
14.2.1.3.4 Uneven Density in Sub Scanning Direction........................................................................................................................................14-5
14.2.1.3.5 Uneven Density Caused by Irregular Rotation of the Main Motor.....................................................................................................14-6
14.2.1.4 Partially Blank/Streaked..............................................................................................................................................................................14-7
14.2.1.4.1 White lines appear in sub scanning direction on solid black and halftone images: Dust on top cover of Developing Assembly .....14-7
14.2.1.4.2 White lines appear in sub scanning direction on solid black and halftone images: Foreign substances adhere to edge of Feeder Guide
14-7
14.2.1.4.3 Void/uneven image/toner is not supplied: Because connector of toner feedscrew motor is unplugged.............................................14-8
14.2.1.4.4 Faulty image/void (in sub scanning direction) appears approx. 10mm away from front side of paper: Because contact image sensor is
faulty................................................................................................................................................................................................................14-8
14.2.1.4.5 Void at about 43mm intervals/uneven density (in main scanning direction): Because developing assembly is faulty......................14-8
14.2.1.4.6 Horizontal Line/Blurring at Intervals of 94 to 95 mm ......................................................................................................................14-12
14.2.1.4.7 White Lines in Sub Scanning Direction............................................................................................................................................14-12
14.2.1.5 Smudged/Streaked.....................................................................................................................................................................................14-13
14.2.1.5.1 Stray Toner Along Fine Lines...........................................................................................................................................................14-13
14.2.1.5.2 Soiled Image Leading Edge ..............................................................................................................................................................14-14
14.2.1.5.3 Black Dots .........................................................................................................................................................................................14-15
14.2.1.6 Ghost/Memory ..........................................................................................................................................................................................14-16
14.2.1.6.1 Ghost .................................................................................................................................................................................................14-16
14.2.1.7 Stretching/Shrinking .................................................................................................................................................................................14-17
14.2.1.7.1 Distorted line or jagged line occurs when copying drawing or document including ruled line: Because of defective laser scanner
assembly ........................................................................................................................................................................................................14-17
14.2.1.7.2 DADF-N1: Image stretch or shrinkage (in sub scanning direction) occurs in stream reading upon installation .............................14-18
14.2.1.7.3 Output image is scaled down in original feed direction because CIS read position is shifted: After replacing paper pick-up assembly
for DADF-N1 ................................................................................................................................................................................................14-18
14.2.2 Malfunction............................................................................................................................................................................ 14-19
14.2.2.1 No Power...................................................................................................................................................................................................14-19
14.2.2.1.1 Upon installation, machine does not start up / LCD does not come on although main power indicator on control panel lights up: Poor
connection of ROM/RAM.............................................................................................................................................................................14-19
14.2.2.1.2 Progress bar stops at midpoint and machine fails to start/Unable to power-on: Because J1016 connector is broken......................14-19
14.2.2.1.3 LCD on control panel does not display anything upon installation: Because Main Controller PCB is faulty .................................14-19
14.2.2.1.4 No power/machine does not start up/LCD displays nothing: Because Main controller PCB is faulty.............................................14-19
14.2.2.1.5 LCD displays nothing/progress bar on LCD stops at one-fifth point and machine repeats restart: Because main controller PCB is faulty
14-20
14.2.2.2 Control Panel-Related ...............................................................................................................................................................................14-20