COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
iv
CHAPTER 4 IMAGE FORMATION SYSTEM
I.
PROCESS DESCRIPTION..........4-1
A.
Outline ....................................4-1
B.
Sequence of Image Formation
Operations (A4, 2 copies) .......4-2
C. Primary Charging Control Circuit
................................................4-3
1.
Outline ...............................4-3
2.
Operations .........................4-4
D. Controlling Developing Bias....4-6
1.
Outline ...............................4-6
2.
Operations .........................4-8
E.
Transfer Charging Control Circuit
..............................................4-10
1.
Outline .............................4-10
2.
Operations .......................4-11
F.
Document Density Measurement
(AE; PC420/430/FC220) .......4-14
1.
Outline .............................4-14
2.
Operations .......................4-14
3.
Adjusting the AE Mechanism
(VR602, VR603) ..............4-15
II.
CHARGING, DEVELOPING, AND
CLEANING SYSTEMS ..............4-17
A.
Cartridge ...............................4-17
1.
Outline .............................4-17
III. MECHANICAL SYSTEM............4-18
A.
Photosensitive Drum.............4-19
1.
Cleaning the Drum...........4-19
B.
Transfer Charging Roller.......4-20
1.
Cleaning the Transfer
Charging Roller................4-20
2.
Detaching the Transfer
Charging Roller................4-20
CHAPTER 5 PICK-UP/FEEDING SYSTEM
I.
OUTLINE .....................................5-1
II.
CONTROLLING THE PICK-UP
ROLLER.......................................5-2
A.
PC420/430/FC220 ..................5-2
B.
PC400/FC200 .........................5-3
III. CONTROLLING THE
REGISTRATION ROLLER...........5-4
A.
Outline ....................................5-4
B.
Pick-Up/Feeding Timing Chart
(A4, 2 copies)..........................5-5
IV. CHECKING FOR JAMS...............5-6
A.
Delivery Delay Jam .................5-6
1.
PC420/430/FC220 .............5-6
2.
PC400/FC200 ....................5-6
B.
Delivery Stationary Jam ..........5-7
1.
PC420/430/FC220 .............5-7
2.
PC400/FC200 ....................5-7
C. Pick-Up Delay Jam
(PC420/430/FC220)................5-8
D. Pick-Up Stationary Jam ..........5-9
1.
PC420/430/FC220 .............5-9
2.
PC400/FC200 ....................5-9
E.
Paper is present at the pick-up or
delivery sensor at time of power-
on or when the Copy Start key is
pressed. ..................................5-9
V.
MECHANICAL SYSTEM............5-10
A.
Pick-Up Roller Assembly.......5-11
1.
Detaching the Pick-Up Roller
.........................................5-11
B.
Registration Roller Assembly
..............................................5-14
1.
Detaching the Registration
Roller Assembly...............5-14
C. Removing the Separation Pad
..............................................5-15
CHAPTER 6 FIXING SYSTEM
I.
OUTLINE OF OPERATIONS .......6-1
A.
Outline ....................................6-1
B.
Controlling the Fixing Heater
Temperature............................6-3
C. Controlling the Supply Power to
the Fixing Heater ....................6-3
D. Protection Mechanisms ..........6-5
II.
MECHANICAL SYSTEM..............6-6
A.
Fixing Assembly......................6-7
