COPYRIGHT © 1997 CANON INC. CANON NP6218 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)viI. PROCESSES .....................................4-1A. Outline ...........................................4-1B. Basic Sequence of Operations(image formation system)..............4-3C. Controlling the Scanning Lamp .....4-41. Outline ......................................4-42. Turning On and Off theScanning Lamp ........................4-53. Pre-Heating Control(scanning lamp)........................4-54. Sequence of Operations(scanning lamp pre-heatingcontrol; AE, A4, continuous,2 copies)...................................4-55. Controlling the Intensity of theScanning Lamp (FL1)...............4-76. Controlling the FluorescentLamp Heater.............................4-87. Fluorescent Lamp Automatic ...4-98. Fluorescent Lamp ProtectionMechanism ...............................4-9D. Controlling the Primary ChargingRoller Bias .....................................4-101. Outline ......................................4-102. Turning On and Off the PrimaryCharging Roller Bias ................4-113. Controlling the PrimaryCharging Roller Bias to aConstant Voltage ......................4-114. Switching the Primary ChargingRoller Bias Application VoltageLevel .........................................4-115. Application Voltage Level(APVC) for the PrimaryCharging Roller and ScanningLamp On Voltage LevelAutomatic Correction ................4-12E. Controlling the Transfer Roller Bias...4-131. Outline ......................................4-132. Turning On and Off theTransfer Roller Bias ..................4-153. Controlling the Transfer Biasto a Constant Voltage ...............4-154. Controlling the Transfer BiasVoltage Level Correction(ATVC control) ..........................4-155. Current Limiter Circuit(transfer bias) ...........................4-156. Current Limiter Circuit(cleaning bias) ..........................4-15F. Controlling the Static EliminatorBias................................................4-16CHAPTER 4 IMAGE FORMATION SYSTEMCHAPTER 3 EXPOSURE SYSTEMI. BASIC OPERATION ...........................3-1A. Varying the Reproduction Ratio ....3-1II. LENS DRIVE SYSTEM ......................3-1A. Outline ...........................................3-1B. Lens Motor Drive Circuit................3-31. Keeping the Lens MotorStationary .................................3-32. Driving the Lens Motor .............3-3C. Basic Sequence of Operations(lens drive system; non-Direct) ......3-4III. SCANNING DRIVE SYSTEM.............3-5A. Driving the Scanner.......................3-51. Outline ......................................3-52. Relationship between theScanner Sensor and Signals....3-63. Basic Sequence ofOperations (scanner)................3-64. Driving the Scanner Motor .......3-75. Scanner Operations in PageSeparation Mode (non-AE,page separation, A4, 2 copies)..3-8IV. DISASSEMBLY AND ASSEMBLY ......3-9A. Scanner Drive Assembly ...............3-91. Detaching the Scanner DriveMotor ........................................3-92. Detaching the Scanner Cable ..3-103. Assembling the MirrorPosition Tool .............................3-124. Routing the Scanner Cable ......3-135. Adjusting the Position of theMirrors (optical length of No.1, 2, and 3 mirrors)...................3-166. Cleaning the Scanner No. 6Mirror ........................................3-17B. Lens Drive Assembly.....................3-181. Detaching the Lens DriveMotor ........................................3-182. Routing the Lens Cable............3-203. Adjusting the Position of theChange Solenoid......................3-21
