Canon NP6621 Service Manual

Also see for NP6621: Service manual Service handbook

Contents

Canon NP6621 Service Manual Manual pdf 5 page image

iiiCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)CONTENTSCHAPTER 1 GENERAL DESCRIPTIONI. FEATURES ................................................ 1-1II. SPECIFICATIONS ..................................... 1-2A. Copier .................................................. 1-2B. Cassette Feeding Module-B2/Cassette Feeding Module-A2/CassetteFeeding Unit-K1 .................................. 1-5C. Paper Deck Pedestal-K1 ..................... 1-6III. NAMES OF PARTS ................................... 1-7A. Exterior ................................................ 1-7B. Cross Section ...................................... 1-8IV. BASIC OPERATION ................................ 1-13A. Control Panel ..................................... 1-13B. Making Copies ................................... 1-16C. Using the Stack Bypass .................... 1-17D. User Mode ......................................... 1-19V. WARNINGS AND ACTIONS ................... 1-26A. Jam Indicator ..................................... 1-26B. Cleaning the Static ChargeEliminator ........................................... 1-33VI. ROUTINE CLEANING ............................. 1-34I. IMAGE FORMATION ................................ 2-1A. Outline ................................................. 2-1B. Latent Static Image Formation Block .... 2-2C. Step 1 (pre-exposure) ......................... 2-3D. Step 2 (primary charging) .................... 2-3E. Step 3 (image exposure) ..................... 2-4F. Step 4 (development) .......................... 2-4G. Step 5 (transfer) .................................. 2-5H. Step 6 (separation) .............................. 2-6I. Step 7 (fixing) ...................................... 2-7J. Step 8 (drum cleaning) ........................ 2-7II. AUXILIARY PROCESS ............................. 2-8A. Blank Exposure ................................... 2-8CHAPTER 2 COPYING PROCESSCHAPTER 3 OPERATIONS AND TIMINGI. BASIC OPERATIONS ............................... 3-1A. Functional Construction ....................... 3-1B. Outline of Electrical Circuitry ............... 3-2C. Inputs to the DC Controller .................. 3-3D. Outputs from the DC Controller ........... 3-8E. Inputs to and Outputs from the CassetteFeeding Module-B2 Driver PCB ........ 3-13F. Inputs to and Outputs from the CassetteFeeding Module-A2 Driver PCB ........ 3-14G. Inputs to and Outputs from the CassetteFeeding Unit-K1 Driver PCB ............. 3-16H. Main Motor Control Circuit ................. 3-21I. Basic Sequence of Operations(2 copies, continuous, AE) ................ 3-22J. Original Size Detecton Control .......... 3-23II. EXPOSURE SYSTEM ............................. 3-27A. Varying the Reproduction Ratio ........ 3-27B. Lens Drive System ............................ 3-27C. Scanner Drive System ....................... 3-31D. Operations of the Scanner in PageSeparation Mode ............................... 3-34III. IMAGE FORMATION SYSTEM .............. 3-35A. Outline ............................................... 3-35B. Sequence of Operations(image formation system) .................. 3-36C. Controlling the Scanning Lamp ......... 3-37D. Controlling the Primary ChargingRoller ................................................. 3-38E. Controlling the Transfer Roller Bias .... 3-41F. Controlling the Static EliminatorBias .................................................... 3-44G. Controlling the Developing Bias ........ 3-46H. Copy Density Automatic Control ....... 3-48I. Developing/Cleaning Assembly ........ 3-50J. Blank Exposure Control ..................... 3-53K. Primary Charging Roller CleaningControl ............................................... 3-55L. Transfer Roller Locking/ReleasingControl ............................................... 3-56IV. PICK-UP/FEEDING SYSTEM ................. 3-57A. Pick-Up from the Machine ................. 3-57B. Making Two-Sided Copies (1copy) ... 3-61