Table Of Contents - Canon NP6251 Service Manual

CHAPTER 1 GENERAL DESCRIPTION
I. FEATURES.........................................1-1
II. SPECIFICATIONS ..............................1-2
A. Copier ............................................1-2
1. Type..........................................1-2
2. Mechanisms .............................1-2
3. Performance .............................1-3
4. Others.......................................1-6
B. Paper Deck-A1 ..............................1-9
III. NAMES OF PARTS ............................1-10
A. External View.................................1-10
B. Cross Section ................................1-12
CHAPTER 2 BASIC OPERATION
I. BASIC MECHANISMS .......................2-1
A. Functional Construction.................2-1
B. Outline of the Electrical Circuitry ...2-2
C. Basic Sequence of Operations......2-4
1. Basic Sequence of Operations
at Power-On (1/2).....................2-4
2. Basic Sequence of Operations
at Power-On (2/2).....................2-5
3. Basic Sequence of
Operations ................................2-7
CHAPTER 3 EXPOSURE SYSTEM
I. OUTLINE OF OPERATION ................3-1
A. Varying the Reproduction Ratio.....3-1
II. LENS DRIVE SYSTEM ......................3-2
A. Moving of the Lens ........................3-2
1. Outline of the Movement ..........3-2
2. Moving the Lens .......................3-3
3. Lens Motor Control Circuit .......3-3
4. Moving the Lens .......................3-4
III. SCANNER DRIVE SYSTEM ..............3-6
A. Scanner Movement .......................3-6
1. Outline of Movement ................3-6
2. Relationship between the
Scanner Sensors and the
Signals......................................3-7
3. Basic Sequence of Operations..3-8
4. Movement of the Scanner in
Page Separation Mode ............3-9
COPYRIGHT © 1997 CANON INC.
CONTENTS
CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)
1. Copier .......................................1-12
IV. OPERATING THE MACHINE.............1-13
A. Control Panel.................................1-13
B. Extended Modes ...........................1-14
C. User Mode .....................................1-15
1. Types of User Modes ...............1-15
V. ROUTINE MAINTENANCE BY THE
USER..................................................1-19
VI. POINTS TO NOTE (BY THE USER) .1-19
VII. IMAGE FORMATION..........................1-20
A. Outline ...........................................1-20
4. Basic Sequence of Operations
in Page Separation Mode.........2-9
D. Main Motor (M1) Control Circuitry..2-11
1. Outline ......................................2-11
2. Operation..................................2-12
3. Detecting an Error ....................2-12
E. Inputs to the DC Controller............2-13
F. Outputs from the DC Controller.....2-21
G. Inputs to and Outputs from
Accessories ...................................2-32
5. Movement of the Scanner with
the RDF in Use (A4, 2 originals,
1 copy)......................................3-11
6. Movement of the Scanner with
the RDF in Use (A4, 2 copies)..3-13
7. Scanner Motor (M3) Control
Circuit .......................................3-17
IV. OTHERS.............................................3-20
A. Original Size Detection..................3-20
1. Outline of Detection..................3-20
2. Operation..................................3-21
3. Sizes of Originals .....................3-22
V. DISASSEMBLY AND ASSEMBLY......3-23
A. Scanner Drive Assembly ...............3-24
1. Removing the Scanner Drive
Motor ........................................3-24
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