Canon NP6218 Manual De Usuario

I. PROCESSES .....................................4-1

A. Outline ...........................................4-1
B. Basic Sequence of Operations 

(image formation system)..............4-3

C. Controlling the Scanning Lamp .....4-4
D. Controlling the Primary Charging 

Roller Bias .....................................4-10

E. Controlling the Transfer Roller 

Bias................................................4-13

F. Controlling the Static Eliminator 

Bias................................................4-16

G. Controlling Blank Exposure ...........4-18
H. Controlling the Primary Corona 

Roller Cleaning Mechanism ..........4-20

I. Releasing the Transfer Roller ........4-21

II. 

DEVELOPING ASSEMBLY AND 
CLEANING ASSEMBLY .....................4-22
A. Outline ...........................................4-22
B. Controlling the Toner Level 

Detection .......................................4-23

C. Controlling the Development 

Bias................................................4-25

D. Automatic Control of Copy 

Density...........................................4-27

III.  DISASSEMBLY AND ASSEMBLY ......4-30

A. Illumination Assembly....................4-30
B. Drum Unit ......................................4-39
C. Primary Corona Assembly.............4-41
D. Transfer Charging Assembly .........4-44
E. Developing System........................4-47

This chapter discusses the principles of how images are formed. It also explains the timing at

which the various units involved in image formation are operated, and shows how they may be
disassembled/assembled and adjusted.