Konica Minolta Bizhub C650, C550, C451 – Theory of Operation

Theory of Operation Manual Konica Minolta Bizhub C650, C550, C451;
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OUTLINE
1. System configuration
1.1 C650
1.2 C550
1.3 C451
2. Product specifications
3. Section configuration
4. Paper path
4.1 C650/C550
4.2 C451
5. Image creation process
Composition/Operation
6. Overall composition
6.1 Control block diagram
7. Scanner section (IR section)
7.1 Composition
7.1.1 CCD unit
7.2 Drive
7.3 Operation
7.3.1 Scan and exposure lamp control
7.3.2 Preventing stain on the DF original glass
7.3.3 Original size detection control
8. Write section (PH section)
8.1 Composition
8.2 Operation
8.2.1 Outline
8.2.2 Laser exposure process
8.2.3 Laser emission timing
8.2.4 Laser emission area
8.2.5 Color registration control (color shift correction) system
8.2.6 Color skew correction control
8.2.7 PH unit temperature detection control
9. Imaging unit
9.1 Composition
9.2 Drive
9.3 Operation
9.3.1 IU life control
10. Photo conductor section
10.1 Composition
10.2 Drive
10.3 Operation
10.3.1 PC drum drive mechanism
10.3.2 K PC drum phase control
10.3.3 PC drum small amount rotation control
11. Charge Corona section
11.1 Operation
11.1.1 PC drum charge corona ON/OFF control
11.1.2 Charge corona cleaning control
11.1.3 Cleaning/main erase mechanism
12. Developing section
12.1 Composition
12.2 Drive
12.3 Operation
12.3.1 Developing drive control
12.3.2 Developer flow
12.3.3 Developing bias
12.3.4 HMT (high grade micro toning) development
12.3.5 Developer Scattering Preventive Mechanism
12.3.6 TCR sensor control
13. Toner supply section
13.1 Composition
13.2 Drive
13.3 Operation
13.3.1 Toner replenishing mechanism/control
13.3.2 Toner cartridge life control
13.3.3 Toner cartridge life control
13.3.4 Shutter mechanism
14. Transfer Corona section
14.1 Composition
14.1.1 1st Image Transfer section
14.1.2 2nd Image Transfer section
14.2 Drive
14.2.1 1st Image Transfer Section
14.2.2 2st Image Transfer Section
14.3 Operation
14.3.1 Transfer belt speed control
14.3.2 1st Image Transfer Roller mechanism
14.3.3 2nd image transfer roller pressure mechanism
14.3.4 IDC sensor shutter mechanism
14.3.5 ATVC (Auto transfer voltage control)
14.3.6 Transfer belt cleaning
14.3.7 2nd image transfer roller cleaning
14.3.8 Charge neutralization and separation of paper
14.3.9 Detection of new transfer belt unit
14.3.10 Pressure/retraction control during ACS mode
14.3.11 Electric discharge control before the 2nd image transfer
15. Toner collecting section
15.1 Composition
15.2 Drive
15.3 Operation
15.3.1 Toner collecting mechanism
15.3.2 Waste toner agitation control
15.3.3 Waste Toner Box-in-position detection
15.3.4 Waste Toner Near-Full/Full detection control
16. Paper feed section
16.1 Composition
16.1.1 Tray1, 2
16.1.2 Tray3
16.1.3 Tray4
16.2 Drive
16.2.1 Tray1, 2
16.2.2 Tray3
16.2.3 Tray3 horizontal transport
16.2.4 Tray4
16.3 Operation
16.3.1 Tray1, 2
16.3.2 Tray3, 4
17. Bypass section
17.1 Composition
17.2 Drive
17.3 Operation
17.3.1 Bypass paper take-up control
17.3.2 Paper empty detection
17.3.3 Bypass paper lifting motion control
17.3.4 Paper size detection
17.3.5 Bypass unit open/close mechanism
17.3.6 Bypass sub tray open/close detection
18. Timing roller section
18.1 Composition
18.2 Operation
18.2.1 Timing roller control
18.2.2 OHP detection
18.2.3 Speed control
19. Fusing section
19.1 Composition
19.2 Drive
19.3 Operation
19.3.1 Heating roller structure
19.3.2 Whole area heating/Center heating switch control
19.3.3 Fusing roller drive control
19.3.4 Fusing loop control
19.3.5 Fusing pressure roller pressure/retraction mechanism
19.3.6 Fusing temperature control
19.3.7 Protection from abnormally high temperature
19.3.8 Sensor disconnection detection control
19.3.9 Heating roller rotate detection
19.3.10 Detection of a new fusing unit
19.3.11 PPM control
20. Paper exit section
20.1 Composition
20.2 Drive
20.3 Operation
20.3.1 Switchback control
21. Duplex section
21.1 Composition
21.2 Drive
21.2.1 Duplex unit drive
21.3 Operation
21.3.1 Duplex unit transport control
21.3.2 Duplex print
22. Image stabilization control
22.1 Overview
22.2 Operation
22.2.1 IDC registration sensor adjustment control
22.2.2 Max. density adjustment control
22.2.3 LD (laser diode) intensity adjustment control
22.2.4 Gamma correction control
22.3 Operation sequence
22.4 Operation timing
23. Image processing
23.1 Scanner section image processing block diagram
23.2 Write section image processing block diagram
24. Other control
24.1 Fan control
24.1.1 Construction
24.1.2 Operation
24.2 Counter control
24.2.1 Construction
24.3 Power supply unit
24.4 Parts operated when the main power switch and sub power switch are turned ON
24.4.1 Parts operated when the main power switch and sub power switch are turned ON
24.5 Authentication unit (Biometric type) (AU-101)
24.6 Authentication unit (IC card type: AU-201)

Numbers of pages: 442.