Canon PC400 Service Manual - Page 6

Image Formation System, Pick-up/feeding System, Fixing System

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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 poweron 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 iv COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

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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