Oki C7400n Service Manual
Also see for C7000: Limited warrantyInstallation instructionsBrochure & specsSetup guideService manual
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Contents
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41316401TH Rev.4 4 /CONTENTS1. CONFIGURATIONS ......................................................................................... 71.1 System Configuration ....................................................................................................... 71.2 Printer Configuration ........................................................................................................ 81.3 Option Configuration ........................................................................................................ 91.4 Specifications ................................................................................................................. 102. OPERATION DESCRIPTION ......................................................................... 122.1 Main Board (CRM PWB) ................................................................................................ 13132.2 Engine Controller Board (K71 PWB) .............................................................................. 152.3 Power Units .................................................................................................................... 162.4 Mechanical Processes .................................................................................................. 172.4.1 Electrophotographic process ............................................................................ 182.4.2 Paper running process ..................................................................................... 232.5 Sensor ............................................................................................................................ 312.5.1 Paper related sensors ...................................................................................... 312.5.2 Other sensors ................................................................................................... 322.6 Color Misalignment Correction ....................................................................................... 332.7 Transfer Control Responds to Environmental Changes(Room Temperatures and Relative Humidities) ............................................................. 332.8 Paper Jam Detection ..................................................................................................... 342.9 Cover-Open ................................................................................................................... 352.10 Toner Low Detection ...................................................................................................... 362.11 Page Size Detection ...................................................................................................... 372.12 Operation at Power-on ................................................................................................... 382.12.1 Self-diagnostic test ........................................................................................... 382.13 Color Misalignment Detection ........................................................................................ 392.14 Version Read of Units Replaced Periodically ................................................................ 402.15 Life Count for Units Replaced Periodically ..................................................................... 402.16 Toner Consumption Detection ...................................................................................... 403. PARTS REPLACEMENT ................................................................................ 413.1 Precautions in Replacing Parts ...................................................................................... 413.2 Parts layout .................................................................................................................... 433.3 Replacing Parts .............................................................................................................. 493.3.1 Top Cover ......................................................................................................... 513.3.2 LED Assy/ LED Assy Spring ............................................................................. 523.3.3 Top Cover Unit ................................................................................................. 533.3.4 Control Panel Assy/ Control Panel Bezel/ LED Control PWB/ Toner Sensors/Stacker Full Sensor/ Control Panel/ Control Panel Tape Harness/ Eject Rollers . 543.3.5 Top Cover Handle/ Top Cover Latch/ Top Cover Latch Spring ........................ 553.3.6 Eject Guide Assy .............................................................................................. 563.3.7 Cassette Assy/ Front Cover Assy/ Front Cover Inner Baffle ........................... 573.3.8 Retard Pad Assy/ Retard Pad Assy Spring ...................................................... 583.3.9 Feed Roller and Nudger Roller ......................................................................... 593.3.10 Rear Cover ....................................................................................................... 603.3.11 Face-Up Tray .................................................................................................... 613.3.12 Left Side Cover ................................................................................................. 623.3.13 Right Side Cover .............................................................................................. 633.3.14 Multipurpose Tray Assy/ Multipurpose Tray Cover Assy/ Links/Multipurpose Tray Top Cover/ Multipurpose Tray Drive Gear .......................... 643.3.15 Drum Contact Assys .......................................................................................... 653.3.16 Registration Roller Assy (A)/ Registration Drive Gear (A) ................................ 663.3.17 Registration Roller Assy (B) ............................................................................. 673.3.18 Registration Clutch and Registration Motor Assy ............................................. 683.3.19 Main Cooling Fan ............................................................................................. 69 |
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