COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4IMAGE FORMATION SYSTEMI. PROCESSES ...............................4-1A. Outline ...................................4-1B. Basic Operation of ImageFormation System(black developing assembly,2 copies) ................................4-2II. CONTROLLING THE SCANNINGLAMP ..........................................4-3A. Outline ...................................4-3B. Mechanism ............................4-4III. PRIMARY/TRANSFERCORONA CURRENT AND GRIDBIAS VOLTAGE CONTROLSYSTEM ......................................4-5A. Outline ...................................4-5B. Switching Primary/TransferCorona Current ON/OFF .......4-5C. Maintaining Primary/TransferCorona Current Constant ......4-6D. Controlling Grid BiasVoltage ..................................4-7IV. CONTROLLING DEVELOPINGBIAS .............................................4-8A. Outline ...................................4-8B. Operation ..............................4-9V. DOCUMENT DENSITYMEASUREMENT SYSTEM ...... 4-11A. Outline ................................ 4-11B. Operation ........................... 4-11C. Reading the Output of the AESensor ................................ 4-12D. Adjustment ......................... 4-13VI. DEVELOPING ASSEMBLY/DRUM CLAENER ..................... 4-14A. Outlines .............................. 4-14B. Remaining Toner Sensor .... 4-14C. Torque Limiter..................... 4-15VII. BLANKING ................................ 4-16A. Outline ................................ 4-16B. Movement of the BlankExposure Mechanism ........ 4-17VIII. DISASSEMBLY ANDASSEMBLY ............................... 4-19A. Main Motor Assembly ......... 4-19B. Corona System .................. 4-20C. Primary/Transfer CoronaAssembly ............................ 4-22D. Development System ......... 4-25
