Canon iR4570 Series Service Manual page 25

Chapter 14 Correcting Faulty Images
14.1 Making lnitial Checks ................................................................................................................................... 14- 1
14.1.1Site Environment ..................................................................................................................................... 14- 1
14.1.2Checking the Paper.................................................................................................................................. 14- 1
14.1.3Checking the Placement of Paper............................................................................................................ 14- 1
14.1.4Checking the Durables ............................................................................................................................ 14- 1
14.1.5Checking the Periodically Serviced Items............................................................................................... 14- 1
14.1.6Checking the Units and Functional Systems ........................................................................................... 14- 2
14.1.7Others ...................................................................................................................................................... 14- 3
14.2 Troubleshooting............................................................................................................................................. 14- 4
14.2.1 Image Faults............................................................................................................................................ 14- 4
14.2.1.1 Uneven Density ............................................................................................................................... 14- 4
14.2.1.2 Partially Blank/Streaked.................................................................................................................. 14- 6
14.2.1.3 Smudged/Streaked......................................................................................................................... 14- 11
14.2.1.4 Ghost/Memory............................................................................................................................... 14- 15
14.2.2 Malfunction........................................................................................................................................... 14- 16
14.2.2.1 No Power ....................................................................................................................................... 14- 16
14.2.2.2 Noise.............................................................................................................................................. 14- 17
14.2.3 Transmission/fax-related....................................................................................................................... 14- 17
14.2.3.1 Transmission Problem ................................................................................................................... 14- 17
14.2.4 Specifications-related FAQ................................................................................................................... 14- 18
14.2.4.1 FAQ on Main Unit Specifications................................................................................................. 14- 18
14.2.4.2 FAQ on Send Specifications ......................................................................................................... 14- 21
14.2.4.3 FAQ on G3FAX Specifications..................................................................................................... 14- 21
14.3 Outline of Electrical Components ............................................................................................................... 14- 23
14.3.1 Clutch/Solenoid..................................................................................................................................... 14- 23
14.3.1.1 Clutches and Solenoids.................................................................................................................. 14- 23
14.3.2 Motor..................................................................................................................................................... 14- 24
14.3.2.1 Motors............................................................................................................................................ 14- 24
14.3.3 Fan......................................................................................................................................................... 14- 27
14.3.3.1 Fans................................................................................................................................................ 14- 27
14.3.4 Sensor.................................................................................................................................................... 14- 28
14.3.4.1 Sensors........................................................................................................................................... 14- 28
14.3.5 Switch ................................................................................................................................................... 14- 33
14.3.5.1 Switches......................................................................................................................................... 14- 33
14.3.6 Lamps, Heaters, and Others .................................................................................................................. 14- 34
14.3.6.1 Lamps, Heaters, and Others........................................................................................................... 14- 34
14.3.6.2 Lamps, Heaters, and Others........................................................................................................... 14- 37
14.3.7 PCBs ..................................................................................................................................................... 14- 40
14.3.7.1 PCBs .............................................................................................................................................. 14- 40
14.3.7.2 PCBs .............................................................................................................................................. 14- 43
14.3.8 Variable Resistors(VR), Light-Emitting Diodes(LED),and Check Pins by PCB................................. 14- 46
14.3.8.1 Variable Resistors (VR), Light-Emitting Diodes, and Check Pins by PCB.................................. 14- 46
14.3.8.2 Points to Note About the Leakage Breaker ................................................................................... 14- 47
14.3.8.3 All-Night Power Supply PCB ....................................................................................................... 14- 47
Chapter 15 Self Diagnosis
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