Canon NP6320 Service Manual page 61

IMAGE FORMATION SYSTEM
I. IMAGE FORMATION SYSTEM ... 4-1
A. Outline ................................... 4-1
B. Basic Operation of Image
Formation System ................. 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 THE
DEVELOPING BIAS .................... 4-8
A. Outline ...................................4-8
B. Operation ..............................4-9
C. Developing Bias
Operation ........................... 4-11
COPYRIGHT © 1999 CANON INC.
CHAPTER 4
V.
VI. DEVELOPING ASSEMBLY/
VII. BLANKING ................................ 4-15
VIII. DISASSEMBLY AND
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
DOCUMENT DENSITY
MEASUREMENT SYSTEM ...... 4-12
A. Outline ................................ 4-12
B. Operation ........................... 4-12
C. Reading the Output of the AE
Sensor ................................ 4-13
DRUM CLAENER ..................... 4-14
A. Outlines .............................. 4-14
B. Remaining Toner Sensor.... 4-14
C. Torque Limiter .................... 4-14
A. Outline ................................ 4-15
B. Movement of the Blank
Exposure Mechanism ........ 4-16
ASSEMBLY ............................... 4-18
A. Exposure Assembly ........... 4-18
B. Blank Assembly .................. 4-20
C. CORONA SYSTEM............ 4-21
D. Development System ......... 4-24