Olivetti d-Color 201MF User manual

d-Color 201MF
Color Printer
THEORY OF OPERATION
Code Y109670-2

PUBLICATION ISSUED BY:
Olivetti S.p.A.
77, Via Jervis - 10015 Ivrea (TO)
Italy
Copyright © 2008, Olivetti
All rights reserved

Revision history
After publication of this service manual, the parts and mechanism may be subject to change for
improvement of their performance.
Therefore, the descriptions given in this service manual may not coincide with the actual machine.
When any change has been made to the descriptions in the service manual, a revised version will be
issued with a revision mark added as required.
Revision mark:
• To indicate clearly a section revised, show to the left of the revised section.
A number within represents the number of times the revision has been made.
• To indicate clearly a section revised, show in the lower outside section of the correspond-
ing page.
A number within represents the number of times the revision has been made.
NOTE
Revision marks shown in a page are restricted only to the latest ones with the old ones deleted.
• When a page revised in Ver. 2.0 has been changed in Ver. 3.0:
The revision marks for Ver. 3.0 only are shown with those for Ver. 2.0 deleted.
• When a page revised in Ver. 2.0 has not been changed in Ver. 3.0:
The revision marks for Ver. 2.0 are left as they are.
1
1
1
1

bizhub C200
OutlineComposition/Operation
Theory of operation Ver. 1.0 Sep. 2008
i
CONTENTS
d-Color MF201 Main body
Outline
1. System configuration............................................................................................... 1
2. Product specifications ............................................................................................. 3
3. Section configuration............................................................................................... 8
4. Paper path............................................................................................................... 9
5. Image creation process......................................................................................... 10
Composition/Operation
6. Overall composition............................................................................................... 13
6.1 Control block diagram......................................................................................... 13
7. Scanner section (IR section) ................................................................................. 14
7.1 Composition........................................................................................................ 14
7.2 Drive ................................................................................................................... 15
7.3 Operation ............................................................................................................ 16
7.3.1 When the power is ON................................................................................ 16
7.3.2 When the Start key is pressed .................................................................... 17
7.3.3 Exposure unit .............................................................................................. 19
7.3.4 Original size detection control ..................................................................... 20
8. Write section (PH section)..................................................................................... 21
8.1 Composition........................................................................................................ 21
8.2 Operation ............................................................................................................ 22
8.2.1 Exposure path............................................................................................. 22
8.2.2 Write control................................................................................................ 23
8.2.3 Writing area................................................................................................. 24
8.2.4 Color registration control............................................................................. 25
8.2.5 Protection shutter mechanism .................................................................... 29
9. Imaging unit section (IU section)........................................................................... 30
9.1 Composition........................................................................................................ 30
9.2 Drive ................................................................................................................... 31
9.3 Operation ............................................................................................................ 32
9.3.1 IU life control ............................................................................................... 32
10. Photo conductor section........................................................................................ 34
10.1 Composition........................................................................................................ 34
10.2 Drive ................................................................................................................... 34
10.3 Operation ............................................................................................................ 35
d-Color MF201

bizhub C200
OutlineComposition/Operation
Theory of operation Ver. 1.0 Sep. 2008
ii
10.3.1 PC drum drive mechanism ......................................................................... 35
10.3.2 PC drum phase control ............................................................................... 37
10.3.3 PC drum small amount rotation control ...................................................... 38
11. Charge corona section.......................................................................................... 39
11.1 Operation............................................................................................................ 40
11.1.1 PC drum charge corona ON/OFF control ................................................... 40
11.1.2 Cleaning/main erase mechanism ............................................................... 40
12. Developing section................................................................................................ 41
12.1 Composition ....................................................................................................... 41
12.2 Drive ................................................................................................................... 42
12.3 Transfer belt pressure retraction clutch .............................................................. 46
12.3.1 Developing drive control ............................................................................. 46
12.3.2 Developer flow ............................................................................................ 47
12.3.3 Developing bias .......................................................................................... 48
12.3.4 TCR sensor control..................................................................................... 49
13. Toner supply section ............................................................................................. 50
13.1 Composition ....................................................................................................... 50
13.2 Drive ................................................................................................................... 51
13.3 Operation............................................................................................................ 52
13.3.1 Toner replenishing mechanism/control ....................................................... 52
13.3.2 Toner cartridge detection ............................................................................ 53
13.3.3 Toner remainder amount detection ............................................................. 54
13.3.4 Shutter mechanism..................................................................................... 55
14. Transfer corona section......................................................................................... 56
14.1 Composition ....................................................................................................... 56
14.1.1 1st image transfer section........................................................................... 56
14.1.2 2nd image transfer section.......................................................................... 57
14.2 Transfer belt pressure retraction clutch .............................................................. 58
14.2.1 1st image transfer section........................................................................... 58
14.2.2 2nd image transfer section.......................................................................... 59
14.3 Operation............................................................................................................ 60
14.3.1 Transfer belt drive mechanism .................................................................... 60
14.3.2 1st image transfer roller mechanism........................................................... 60
14.3.3 2nd image transfer roller pressure mechanism........................................... 63
14.3.4 IDC sensor shutter mechanism .................................................................. 64
14.3.5 ATVC (Auto transfer voltage control)........................................................... 65
14.3.6 Transfer belt cleaning.................................................................................. 66
14.3.7 Reversing control of the transfer belt .......................................................... 66
d-Color MF201

bizhub C200
OutlineComposition/Operation
Theory of operation Ver. 1.0 Sep. 2008
iii
14.3.8 2nd image transfer roller cleaning............................................................... 67
14.3.9 Charge neutralization and separation of paper ........................................... 68
14.3.10 Detection of new transfer belt unit............................................................... 68
14.3.11 New unit detection timing/operation ............................................................ 68
14.3.12 Pressure/retraction control during ACS mode............................................. 69
14.3.13 ASC mode control change with the software SW ....................................... 71
15. Toner collecting section ......................................................................................... 72
15.1 Composition........................................................................................................ 72
15.2 Drive ................................................................................................................... 73
15.3 Operation ............................................................................................................ 74
15.3.1 Toner collecting mechanism........................................................................ 74
15.3.2 Waste toner box-in-position detection......................................................... 74
15.3.3 Waste toner near-full/full detection control.................................................. 75
16. Paper feed section................................................................................................. 79
16.1 Tray1 ................................................................................................................... 79
16.1.1 Composition ................................................................................................ 79
16.1.2 Drive............................................................................................................ 80
16.1.3 Paper Take-up control ................................................................................. 80
16.1.4 Paper Near-Empty/Paper Empty detection ................................................. 81
16.1.5 Paper Interval Control (PPM Control) ......................................................... 81
16.1.6 Paper size detection control........................................................................ 82
17. Timing roller section .............................................................................................. 84
17.1 Composition........................................................................................................ 84
17.2 Drive ................................................................................................................... 84
17.3 Operation ............................................................................................................ 85
17.3.1 Timing roller control .................................................................................... 85
18. Fusing section ....................................................................................................... 86
18.1 Composition........................................................................................................ 86
18.2 Drive ................................................................................................................... 87
18.3 Operation ............................................................................................................ 88
18.3.1 Fusing roller drive control............................................................................ 88
18.3.2 Fusing loop control...................................................................................... 88
18.3.3 Fusing pressure roller pressure/retraction mechanism............................... 90
18.3.4 Fusing temperature control ......................................................................... 91
18.3.5 Fusing temperature control during a print job ............................................. 92
18.3.6 Temperature control during stand-by .......................................................... 92
18.3.7 Temperature control during low power mode .............................................. 92
18.3.8 Protection from abnormally high temperature............................................. 93
d-Color MF201

bizhub C200
OutlineComposition/Operation
Theory of operation Ver. 1.0 Sep. 2008
iv
18.3.9 Detection of a new fusing unit..................................................................... 93
18.3.10 PPM control ................................................................................................ 93
18.3.11 Delay control............................................................................................... 93
19. Paper exit/switchback section ............................................................................... 94
19.1 Composition ....................................................................................................... 94
19.2 Drive ................................................................................................................... 95
19.3 Operation............................................................................................................ 96
19.3.1 Paper exit control ........................................................................................ 96
20. Image stabilization control .................................................................................... 97
20.1 Overview ............................................................................................................ 97
20.2 Operation............................................................................................................ 98
20.2.1 IDC registration sensor adjustment control................................................. 98
20.2.2 Max. density adjustment control ................................................................. 98
20.2.3 LD (laser diode) intensity adjustment control.............................................. 98
20.2.4 Gamma correction control .......................................................................... 98
20.3 Operation sequence ........................................................................................... 99
20.4 Operation timing ............................................................................................... 100
21. Image processing................................................................................................ 103
21.1 Scanner section image processing block diagram ........................................... 103
21.2 Write section image processing block diagram ................................................ 104
22. Other control ....................................................................................................... 106
22.1 Fan control........................................................................................................ 106
22.1.1 Construction.............................................................................................. 106
22.1.2 Operation .................................................................................................. 107
22.2 Counter control................................................................................................. 110
22.2.1 Construction.............................................................................................. 110
22.3 Parts operated when the main power switch and sub power switch are
turned ON......................................................................................................... 111
22.3.1 Parts operated when the main power switch and sub power switch are
turned ON ................................................................................................. 111
d-Color MF201

Theory of operation Ver. 1.0 Sep. 2008 1. System configuration
1
bizhub C200
Outline
Outline
1. System configuration
1/2 System front view
*1: Option of OC-508
[1] Main body [8] Desk DK-504
[2] Original cover OC-508 [9] Paper feed cabinet PC-104
[3] Automatic document feeder
DF-612
[10] Paper feed cabinet PC-204
[4] Working table WT-503 [11] Paper feed cabinet PC-405
[5] Automatic duplex unit AD-505 [12] Job separator JS-505
[6] Multi bypass tray MB-502 [13] Assist handle AH-101 *1
[7] Paper feed cabinet (2nd) PC-105
[2]
[6]
[8][10]
[11]
[12] [1]
[3]
[13]
A02FT1E007AA
[4]
[7]
[5]
[9]
Y109670-2 Theory of Operation
d-Color MF201

1. System configuration Theory of operation Ver. 1.0 Sep. 2008
2
bizhub C200
Outline
2/2 System rear view
[1] Main body [4] Fax multi line ML-504
[2] Stamp unit SP-503 [5] Fax kit FK-507
[3] Expanded memory unit EM-310
[2]
[1]
[4]
[5]
A02FT1E008AA
[3]
Theory of Operation Y109670-2
d-Color MF201

Theory of operation Ver. 1.0 Sep. 2008 2. Product specifications
3
bizhub C200
Outline
2. Product specifications
A. Type
*1: Only when the optional paper feed cabinet/desk is installed.
Type Desktop/console *1 scanner/printer
Printing process Laser electrostatic printing system
PC drum type OPC drum: KM-12 (OPC with high mold releasability)
Scanning resolution 600 dpi
File memory 64 MB + 512 MB (Option)
Exposure lamp White rare-gas fluorescent lamp
Platen Stationary (Unit scan)
Original scanning Unit scanning CCD optical system
* Sheet through system when DF-612 is used
Registration Rear left edge
Paper feeding
separation system Tray 1 : Small roller separation system with torque limiter
Exposure system • Four-multi array PH unit system
• Polygon mirror scan system
Exposure resolution 600 dpi u600 dpi
Developing system Dry 2 components developing method, HMT developing system
Charging system DC comb electrode scorotron system
Neutralizing system Red LED system
Image transfer system Belt image transfer system (1st)/roller image transfer system (2nd)
Paper separating
system Combination of curvature, separating claws, and bias system
Fusing system Belt fusing
Heating system Halogen lamp
Y109670-2 Theory of Operation
d-Color MF201