Konica Minolta bizhub 200 Service Manual page 28

Theory of Operation Ver. 2.5 Jul. 2006
bizhub 200/250/350 Main Unit
Outline
1. System configuration............................................................................................... 1
2. Product specifications ............................................................................................. 3
3. Center cross section ............................................................................................... 6
4. Paper path............................................................................................................... 7
5. Image creation process ........................................................................................... 8
Composition/Operation
6. Overall composition................................................................................................. 9
6.1 Timing chart at machine power up ....................................................................... 9
6.2 Control block diagram ......................................................................................... 10
7. Scanner section (IR section) ................................................................................. 11
7.1 Composition........................................................................................................ 11
7.2 Drive ................................................................................................................... 12
7.3 Operation ............................................................................................................ 13
7.3.1 Scan and Exposure Lamp control ............................................................... 13
7.3.2 Original Size Detection control.................................................................... 14
8. Write section (PH section)..................................................................................... 16
8.1 Composition........................................................................................................ 16
8.2 Operation ............................................................................................................ 17
8.2.1 Laser exposure process.............................................................................. 17
8.2.2 Laser emission timing ................................................................................. 17
8.2.3 Advance Polygon Rotation .......................................................................... 17
8.2.4 Laser Shutter Mechanism ........................................................................... 18
8.2.5 Laser emission area.................................................................................... 18
9. Imaging Unit section (IU section) .......................................................................... 20
9.1 Composition........................................................................................................ 20
9.2 Drive ................................................................................................................... 21
9.3 Operation ............................................................................................................ 22
9.3.1 Outline......................................................................................................... 22
9.3.2 IU Life control .............................................................................................. 22
10. Photo Conductor section ....................................................................................... 24
10.1 Composition........................................................................................................ 24
10.2 Drive ................................................................................................................... 25
10.3 Operation ............................................................................................................ 26
CONTENTS
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