Canon imageFORMULA ScanFront 400 Service Manual page 4

CHAPTER 1
GENERAL DESCRIPTION
I. PRODUCT OUTLINE .............................. 1-1
1. Features .............................................. 1-1
2. Main Specifications ............................. 1-2
3. Precautions ......................................... 1-5
II. NAME OF PARTS .................................... 1-6
1. Front/Side View ................................... 1-6
2. Rear View ........................................... 1-6
III. USER OPERATION ................................. 1-7
1. Preparation ......................................... 1-7
2. Flow of Scanner Operations ............... 1-9
CHAPTER 2
FUNCTIONS & OPERATION
I. OUTLINE ................................................. 2-1
1. System Configuration ......................... 2-1
2. Basic Software Configuration ............. 2-2
3. Main Body Structure ........................... 2-3
4. Motor Drive ......................................... 2-4
5. Electrical Circuits ................................ 2-5
6. Timing Chart........................................ 2-6
7. Basic Knowledge of Network .............. 2-7
II. READING SYSTEM................................. 2-8
1. Reading Unit ....................................... 2-8
2. Shading ............................................... 2-9
III. FEED SYSTEM ..................................... 2-10
1. Feeding Mechanism.......................... 2-10
2. Feed Error Detection......................... 2-14
IV. CONTROL SYSTEM ............................. 2-16
1. Motherboard ...................................... 2-16
2. Control PCB ...................................... 2-18
3. Image Processing Control ................ 2-19
V. POWER SUPPLY .................................. 2-21
1. Outline ............................................... 2-21
2. Lithium Battery .................................. 2-22
VI. ELECTRICAL PARTS LAYOUT ............. 2-23
CONTENTS
COPYRIGHT © CANON ELECTRONICS INC. 2016
1. Lower Base Unit ................................ 2-23
2. Upper Base Unit ................................ 2-24
3. Front Unit .......................................... 2-25
VII. PARTS LAYOUT ON EACH PCB .......... 2-26
1. Motherboard ...................................... 2-26
2. Control PCB ...................................... 2-27
3. Sub PCB ........................................... 2-28
4. Interface Circuit Board ...................... 2-39
5. Panel Relay PCB .............................. 2-30
6. Power Supply Switch Circuit Board .. 2-31
CHAPTER 3
DISASSEMBLY &
REASSEMBLY
I. EXTERNAL PARTS ................................. 3-1
1. Pickup Tray ......................................... 3-1
2. Eject Tray ............................................ 3-1
3. Lower Cover ........................................ 3-2
II. FRONT UNIT ........................................... 3-3
1. Front Panel Assembly ......................... 3-3
2. LCD Assembly .................................... 3-4
3. Sub PCB ............................................. 3-5
4. Stop Cam Drive Unit ........................... 3-7
5. Upper Drive Unit ................................. 3-7
6. Front Unit ............................................ 3-8
7. Upper Feed Guide Plate ..................... 3-9
8. Follower Roller (Regist Side) ............ 3-10
9. Follower Roller (Eject Side) .............. 3-10
III. BASE UNIT ............................................ 3-11
1. Motherboard ...................................... 3-11
2. Interface PCB .................................... 3-12
3. Lithium Battery .................................. 3-13
4. Memory ............................................. 3-13
5. Control PCB ...................................... 3-14
6. Damper Unit ...................................... 3-15
7. Feed Motor ........................................ 3-16
8. Main Motor ........................................ 3-17
9. Dust Cover ........................................ 3-18
10. Clutch ............................................... 3-19
CANON SF-400 FIRST EDITION