Image Formation System - Canon NP6317 Service Manual

IMAGE FORMATION SYSTEM

I. PROCESSES ...............................4-1
A. Outline ...................................4-1
B. Basic Operation of Image
Formation System
(black developing assembly,
2 copies) ................................4-2
II. CONTROLLING THE SCANNING
LAMP ..........................................4-3
A. Outline ...................................4-3
B. Mechanism ............................4-4
III. PRIMARY/TRANSFER
CORONA CURRENT AND GRID
BIAS VOLTAGE CONTROL
SYSTEM ......................................4-5
A. Outline ...................................4-5
B. Switching Primary/Transfer
Corona Current ON/OFF .......4-5
C. Maintaining Primary/Transfer
Corona Current Constant ......4-6
D. Controlling Grid Bias
Voltage ..................................4-7
IV. CONTROLLING DEVELOPING
BIAS .............................................4-8
A. Outline ...................................4-8
COPYRIGHT © 1999 CANON INC.
CHAPTER 4
CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
B. Operation ..............................4-9
V. DOCUMENT DENSITY
MEASUREMENT SYSTEM ...... 4-11
A. Outline ................................ 4-11
B. Operation ........................... 4-11
C. Reading the Output of the AE
Sensor ................................ 4-12
D. Adjustment ......................... 4-13
VI. DEVELOPING ASSEMBLY/
DRUM CLAENER ..................... 4-14
A. Outlines .............................. 4-14
B. Remaining Toner Sensor .... 4-14
C. Torque Limiter..................... 4-15
VII. BLANKING ................................ 4-16
A. Outline ................................ 4-16
B. Movement of the Blank
Exposure Mechanism ........ 4-17
VIII. DISASSEMBLY AND
ASSEMBLY ............................... 4-19
A. Main Motor Assembly ......... 4-19
B. Corona System .................. 4-20
C. Primary/Transfer Corona
Assembly ............................ 4-22
D. Development System ......... 4-25