Konica Minolta Bizhub C250 Bizhub C252 Field Service Manual, Theory of Operation and Parts List Manual

Field Service, Theory of Operation Manual and Parts List Manual Konica Minolta Bizhub C250 Bizhub C252;
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Content FIELD SERVICE:
Bizhub C250/C252 Main Unit
GENERAL
1. System configuration
2. Product specifications
2.1 Type
2.2 Functions
2.3 Types of Paper
2.4 Maintenance
2.5 Machine Specifications
2.6 Operating Environment
2.7 Print Functions
2.8 Scan Functions

MAINTENANCE
3. Periodical check
3.1 Service schedule
3.2 Maintenance items
3.2.1 Parts to be replaced by users (CRU)
3.2.2 Maintenance call (per 60,000-print)
3.2.3 Periodical parts replacement 1 (per 120,000-print)
3.2.4 Periodical parts replacement 2 (per 200,000-print)
3.2.5 Periodical parts replacement 3 (per 300,000-print)
3.3 Maintenance parts
3.3.1 Replacement parts
3.3.2 Cleaning parts
3.4 Concept of parts life
3.5 Maintenance procedure (Periodical check parts)
3.5.1 Replacing the Tray 1 Feed Roller
3.5.2 Replacing the Tray 1 Separation Roller Assy
3.5.3 Replacing the Bypass Tray Feed Roller
3.5.4 Replacing the Bypass Tray Separation Roller Assy
3.5.5 Replacing the Tray 2 Separation Roller
3.5.6 Replacing the Tray 2 Feed Roller
3.5.7 Replacing the Tray 2 Pick-up Roller
3.5.8 Cleaning of the Registration Roller
3.5.9 Replacing the Waste Toner Box
3.5.10 Cleaning of the Area around the Waste Toner Collecting Port
3.5.11 Replacing the Ozone Filter
3.5.12 Replacing the Deodorant Filter
3.5.13 Replacing the Dust Filter/Vertical Conveyance
3.5.14 Replacing the Dust Filter/Cooling Fan
3.6 Replacing the unit
3.6.1 Replacing the 2nd Image Transfer Roller Unit
3.6.2 Replacing the Image Transfer Belt Unit
3.6.3 Cleaning of the Image Transfer Entrance Guide
3.6.4 Cleaning of the IDC/Registration Sensor 1, 2
3.6.5 Replacing the Toner Cartridge (C, M, Y, K)
3.6.6 Cleaning of the Comb Electrode
3.6.7 Replacing the Imaging Unit (C, M, Y, K)
3.6.8 Replacing the Fusing Unit
4. Service tool
4.1 CE Tool list
4.2 Copy materials
4.2.1 Imaging Unit Single Parts (IU)
4.2.2 Toner Cartridge Single Parts (T/C)
4.2.3 Waste Toner Box
4.2.4 Maintenance Kit
5. Firmware upgrade
5.1 Outline
5.2 Preparations for firmware rewriting by Cygwin
5.2.1 Outline
5.2.2 Service environment
5.2.3 Installing the Cygwin
5.2.4 Settings of the Windows Environmental Variable
5.2.5 Writing into the Compact flash
5.3 Preparations for firmware rewriting by Firmware Imaging Toolkit 2006
5.3.1 Correspond model
5.3.2 Function outline
5.3.3 System environment
5.3.4 Installation of software
5.3.5 Update of software
5.3.6 Screen
5.3.7 Details of each function
5.3.8 How to write firmware data
5.4 Firmware rewriting by compact flash
5.4.1 Updating method
5.4.2 Action When Data Transfer Fails
5.5 Updating the Firmware with the Internet ISW
5.5.1 Out line
5.5.2 Service environment
5.5.3 Preparations for Firmware rewriting
5.5.4 Firmware rewriting
5.5.5 Error Code List for the Internet ISW
6. Other
6.1 Disassembly/Adjustment prohibited items
6.2 Disassembly/Assembly/Cleaning list (Other parts)
6.2.1 Disassembly/Assembly parts list
6.2.2 Cleaning parts list
6.3 Disassembly/Assembly procedure
6.3.1 IR Upper Right Cover/IR Right Cover/IR Upper Rear Cover
6.3.2 Left Cover (bizhub C250) /Upper Front Cover/IR Left Cover/IR Upper Front Cover
6.3.3 Original Glass/IR Front Cover
6.3.4 Exit Tray/Upper Rear Cover/Lower Rear Cover/Rear Left Cover
6.3.5 Multi Bypass Tray Left Cover/Multi Bypass Tray Right Cover/Multi Bypass Tray Upper Cover
6.3.6 Front Door
6.3.7 Rear Right Cover
6.3.8 Left cover (bizhub C252)
6.3.9 Control Panel (UN201)
6.3.10 Tray 1
6.3.11 Tray 2
6.3.12 Tray 2 Rear Right Cover/Tray 2 Rear Left Cover
6.3.13 Tray 2 Right Rear Cover
6.3.14 Front Cover
6.3.15 Mechanical Control Board (PWB-M)
6.3.16 DC Power Supply (PU1)
6.3.17 Scanner Motor Drive Board (PWB-IC)
6.3.18 CCD Unit
6.3.19 Image Processing Board (PWB-C)
6.3.20 Slide Interface Board (PWB-SIF)
6.3.21 MFP Control Board (PWB-MFP)
6.3.22 DIMM0 (Work0), DIMM1 (Work1)
6.3.23 Hard Disk Drive (HDD)
6.3.24 High Voltage Unit (HV1)
6.3.25 Tray 1 Paper Size Board (PWB-I)
6.3.26 Tray 2 Control Board (PWB-Z-PC)
6.3.27 Tray 2 Paper Size Board (PWB-I-PC)
6.3.28 Inverter Board (PU201)
6.3.29 PH Interface Board (PWB-D)
6.3.30 Multi Bypass Unit
6.3.31 PH Unit
6.3.32 Transport Drive Assy
6.3.33 Hopper Drive Assy
6.3.34 Right Door Assy
6.3.35 Scanner Motor (M201)
6.3.36 Scanner Assy
6.3.37 Scanner Drive Cables
6.3.38 PWB Box
6.3.39 Color Developing Motor (M3)
6.3.40 Color PC Drum Motor (M2)
6.3.41 Toner Supply Motor C/K (M7)
6.3.42 Toner Supply Motor Y/M (M6)
6.3.43 Main Motor (M1)
6.3.44 Fusing Drive Motor (M4)
6.3.45 Tray 2 Lift-Up Motor (M3-PC)
6.3.46 Tray 2 Paper Feed Motor (M1-PC)
6.3.47 Tray 2 Vertical Transport Motor (M2-PC)
6.3.48 IDC/Registration Sensor/1, IDC/Registration Sensor/2 (SE1/SE2)
6.4 Cleaning procedure
6.4.1 PH Window
6.4.2 Image Transfer Belt Unit
6.4.3 Tray 1 Feed Roller
6.4.4 Tray 1 Separation Roller
6.4.5 Bypass Tray Feed Roller
6.4.6 Bypass Tray Separation Roller
6.4.7 Tray 2 Feed Roller/Tray 2 Pick-up Roller
6.4.8 Tray 2 Separation Roller
6.4.9 Tray 2 Transport Roller
6.4.10 Scanner Rail
6.4.11 Mirrors (1st/2nd/3rd)
6.4.12 Lens
6.4.13 Original Glass
6.4.14 CCD Sensor
6.5 Mount the original size detecting sensor/2 (PC204)
6.6 Option counter
6.6.1 Installation method for the Key Counter

ADJUSTMENT/SETTING
7. How to use the adjustment section
8. Utility Mode
8.1 Touch Panel Adjustment
8.2 Utility Mode function tree
8.3 Utility Mode function setting procedure
8.3.1 Procedure
8.3.2 Exiting
8.3.3 Changing the setting value in Utility Mode functions
8.4 One-Touch Registration
8.4.1 Scan
8.4.2 Fax
8.4.3 User Box
8.5 User Setting
8.5.1 System Setting
8.5.2 Display Setting
8.5.3 Initial Setting
8.5.4 Copier Setting
8.5.5 Scanner Setting
8.5.6 Printer Setting
8.5.7 Change Password
8.5.8 Change E-Mail Address
8.6 Administrator Setting
8.6.1 System Setting
8.6.2 Administrator/Machine Setting
8.6.3 One-Touch Registration
8.6.4 User Authentication/Account Track
8.6.5 Network Setting
8.6.6 Copier Setting
8.6.7 Printer Setting
8.6.8 Fax Setting
8.6.9 System Connection
8.6.10 Security Setting
8.7 Banner Printing
9. Adjustment item list
10. Service Mode
10.1 Service Mode function setting procedure
10.2 Service Mode function tree
10.3 Date/Time Input mode
10.3.1 Date & Time Setting mode screen
10.4 Machine
10.4.1 Fusing Temperature
10.4.2 Fusing Transport Speed
10.4.3 Org. Size Detecting Sensor Adj
10.4.4 Printer Area
10.4.5 Scan Area
10.4.6 Printer Resist Loop
10.4.7 Color Registration Adjustment
10.4.8 Fusing Loop Size
10.4.9 Manual Bypass Tray Adjustment
10.4.10 Lead Edge Erase Adjustment
10.5 Firmware Version
10.6 Imaging Process Adjustment
10.6.1 Gradation Adjust
10.6.2 D Max Density
10.6.3 Background Voltage Margin
10.6.4 Transfer Output Fine Adjustment
10.6.5 Stabilizer
10.6.6 Thick Paper Density Adjustment
10.6.7 TCR Toner Supply
10.6.8 Monochrome Density Adjustment
10.6.9 Dev. Bias Choice
10.7 CS Remote Care
10.7.1 Outlines
10.7.2 Setting Up the CS Remote Care
10.7.3 Software SW setting for CS Remote Care
10.7.4 Setup confirmation
10.7.5 Calling the Maintenance
10.7.6 Calling the Center from the Administrator
10.7.7 Checking the transmission log
10.7.8 Detail on settings
10.7.9 List of the CS Remote Care error code
10.7.10 Troubleshooting for CS Remote Care
10.8 System 1
10.8.1 Marketing Area
10.8.2 Tel/Fax Number
10.8.3 Serial Number
10.8.4 No Sleep
10.8.5 Original Size Detection
10.8.6 Foolscap Size Setting
10.8.7 Initialization
10.8.8 Install Date
10.8.9 Communication System Setting
10.9 System 2
10.9.1 HDD
10.9.2 Image Controller Setting
10.9.3 Option Board Status
10.9.4 Consumable Life Reminder
10.9.5 Unit Change
10.9.6 Software Switch Setting
10.9.7 Scan Calibration
10.9.8 LCT Paper Size Setting
10.9.9 Line Mag Setting
10.9.10 Data Capture
10.9.11 Network Fax Settings
10.10 Counter
10.10.1 Procedure
10.10.2 Life
10.10.3 Jam
10.10.4 Service Call Counter
10.10.5 Warning
10.10.6 Maintenance
10.10.7 Service Total
10.10.8 Counter of Each Mode
10.10.9 Service Call History (Data)
10.10.10 ADF Paper Pages
10.10.11 Paper Jam History
10.10.12 Fax Connection Error
10.11 List Output
10.11.1 Machine Management List
10.11.2 Adjustment List
10.11.3 Parameter List
10.11.4 Service Parameter
10.11.5 Protocol Trace
10.11.6 Fax Setting List
10.12 State Confirmation
10.12.1 Sensor Check
10.12.2 Table Number
10.12.3 Level History1
10.12.4 Level History2
10.12.5 Temp. & Humidity
10.12.6 CCD Check
10.12.7 Memory/HDD Adj
10.12.8 Memory/HDD State
10.12.9 Color Regist
10.12.10 IU Lot No
10.12.11 Adjustment Data List
10.13 Test Mode
10.13.1 Procedure for Test Pattern Output
10.13.2 Gradation Pattern
10.13.3 Halftone Pattern
10.13.4 Lattice Pattern
10.13.5 Solid Pattern
10.13.6 Color Sample
10.13.7 8 Color Solid Pattern
10.13.8 Running Mode
10.13.9 Fax Test
10.14 ADF
10.15 FAX
10.16 Finisher
10.17 Internet ISW
10.17.1 Internet ISW Set
10.17.2 HTTP Setting
10.17.3 FTP Setting
10.17.4 Forwarding Access Setting
10.17.5 Download
11. Enhanced Security
11.1 Enhanced Security Function Setting Procedure
11.1.1 Procedure
11.1.2 Exiting
11.2 Enhanced Security Function Tree
11.3 Settings in the Enhanced Security
11.3.1 CE Password
11.3.2 Administrator Password
11.3.3 Administrator Feature Level
11.3.4 CE Authentication
11.3.5 IU Life Stop Setting
11.3.6 NVRAM Data Backup
12. Billing Setting
12.1 Billing Setting Function Setting Procedure
12.1.1 Procedure
12.1.2 Exiting
12.2 Billing Setting Function Tree
12.3 Settings in the Billing Setting
12.3.1 Counter Setting
12.3.2 Management Function Choice
12.3.3 Coverage Rate Clear
13. Procedure for Resetting
13.1 Trouble resetting
13.2 Contents to be cleared by Reset function
14. Mechanical adjustment
14.1 Mechanical adjustment of the scanner section
14.1.1 Adjustment of the Scanner Motor Belt
14.1.2 Focus Positioning of the Scanner and Mirrors Unit
14.2 Scanner Position Adjustment
14.3 Mechanical adjustment of the bypass tray section
14.3.1 Adjustment of the Bypass Paper Size Unit
14.4 PH Unit Mechanical Adjustment
14.4.1 Skew Adjustment

TROUBLESHOOTING
15. Jam Display
15.1 Misfeed Display
15.1.1 bizhub C250
15.1.2 bizhub C252
15.1.3 Misfeed Display Resetting Procedure
15.2 Sensor layout
15.3 Solution
15.3.1 Initial Check Items
15.3.2 Misfeed at Tray 1 feed section
15.3.3 Misfeed at 2nd Image Transfer section
15.3.4 Misfeed at Tray 2 feed, Tray 2 vertical transport section
15.3.5 Misfeed at Manual Bypass feed section
15.3.6 Misfeed at LCT feed and LCT vertical transport section (PC-403)
15.3.7 Misfeed at Tray 3 Feed and Tray 3 vertical transport section (PC-103/PC203)
15.3.8 Misfeed at Tray 4 Feed and Tray 4 vertical transport section (PC203)
15.3.9 Misfeed at Duplex transport section (AD-503)
15.3.10 Misfeed at Duplex Unit pre-registration section (AD-503)
15.3.11 Misfeed at Fusing/Exit section
16. Malfunction code
16.1 Alert code
16.1.1 Alert list
16.2 Solution
16.2.1 S-1: CCD clamp/gain adjustment failure
16.2.2 P-5: IDC Sensor (Front) failure
16.2.3 P-28 IDC Sensor (Back) failure
16.2.4 P-6: Cyan Imaging Unit failure
16.2.5 P-7: Magenta Imaging Unit failure
16.2.6 P-8: Yellow Imaging Unit failure
16.2.7 P-9: Black Imaging Unit failure
16.2.8 P-21: Color Shift Test Pattern failure
16.2.9 P-22: Color Shift Adjust failure
16.2.10 P-26: 1st image transfer ATVC (Black) failure
16.2.11 P-27: 2nd image transfer ATVC failure
16.2.12 P-29: 1st image transfer ATVC (Color) failure
16.2.13 P-30: Color PC Drum Sensor malfunction
16.2.14 P-31: Black PC Drum Sensor malfunction
16.3 Trouble code
16.3.1 Trouble code list
16.4 How to reset
16.5 Solution
16.5.1 C0204: Tray 2 Elevator failure
16.5.2 C0211: Manual Tray Rise Descent Error
16.5.3 C0301: Suction Fan Motor’s failure to turn
16.5.4 C2151: 2nd Image Transfer Roller Separation
16.5.5 C2152: Transfer Belt Separation
16.5.6 C2253: Color PC Drum Motor’s failure to turn
16.5.7 C2254: Color PC Drum Motor’s turning at abnormal timing
16.5.8 C2255: Color Developing Motor’s failure to turn
16.5.9 C2256: Color Developing Motor’s turning at abnormal timing
16.5.10 C2451: Transfer Cleaner Unit New Article Release
16.5.11 C2551: Abnormally low toner density detected Cyan TCR Sensor
16.5.12 C2553: Abnormally low toner density detected Magenta TCR Sensor
16.5.13 C2555: Abnormally low toner density detected Yellow TCR Sensor
16.5.14 C2552: Abnormally high toner density detected Cyan TCR Sensor
16.5.15 C2554: Abnormally high toner density detected Magenta TCR Sensor
16.5.16 C2556: Abnormally high toner density detected Yellow TCR Sensor
16.5.17 C2557: Abnormally low toner density detected Black TCR Sensor
16.5.18 C2558: Abnormally high toner density detected Black TCR Sensor
16.5.19 C2559: Cyan TCR Sensor adjustment failure
16.5.20 C255A: Magenta TCR Sensor adjustment failure
16.5.21 C255B: Yellow TCR Sensor adjustment failure
16.5.22 C255C: Black TCR Sensor adjustment failure
16.5.23 C2651: Cyan Imaging Unit EEPROM access error
16.5.24 C2652: Magenta Imaging Unit EEPROM access error
16.5.25 C2653: Yellow Imaging Unit EEPROM access error
16.5.26 C2654: Black Imaging Unit EEPROM access error
16.5.27 C2A01: Cyan Toner Cartridge EEPROM access error
16.5.28 C2A02: Yellow Toner Cartridge EEPROM access error
16.5.29 C2A03: Magenta Toner Cartridge EEPROM access error
16.5.30 C2A04: Black Toner Cartridge EEPROM access error
16.5.31 C3301: Fusing Cooling Fan Motor /1’s failure to turn
16.5.32 C3302: Fusing Cooling Fan Motor /2’s failure to turn
16.5.33 C3451: Heat. Heater Trouble
16.5.34 C3452: Press. Heater Trouble
16.5.35 C3751: Abnormal High Temp. (Heater)
16.5.36 C3752: Abnormal High Temp. (Press)
16.5.37 C3851: Abnormal Low Temp. (Heater)
16.5.38 C3852: Abnormal Low Temp. (Press)
16.5.39 C3461: Fusing Unit New Article Release
16.5.40 C3A01: Paper Stuck to Fuser Heater Roller
16.5.41 C3A02: Paper Stuck to Fuser Pressure Roller
16.5.42 C4151: Polygon Motor/C failure to turn
16.5.43 C4152: Polygon Motor/M failure to turn
16.5.44 C4153: Polygon Motor/Y failure to turn
16.5.45 C4154: Polygon Motor/K failure to turn
16.5.46 C4551: Laser malfunction (Cyan)
16.5.47 C4552: Laser malfunction (Magenta)
16.5.48 C4553: Laser malfunction (Yellow)
16.5.49 C4554: Laser malfunction (Black)
16.5.50 C4705: Image Output Time Out
16.5.51 C4761: Compression hardware timeout
16.5.52 C4765: Extraction hardware timeout
16.5.53 C4770: JBIG0 Error
16.5.54 C4771: JBIG1 Error
16.5.55 C4772: JBIG2 Error
16.5.56 C4773: JBIG3 Error
16.5.57 C4780: Compressor 0 command buffer stop failure
16.5.58 C4781: Compressor 1 command buffer stop failure
16.5.59 C4782: Compressor 2 command buffer stop failure
16.5.60 C4783: Compressor 3 command buffer stop failure
16.5.61 C5102: Main Motor’s failure to turn
16.5.62 C5103: Main Motor Turning at abnormal timing
16.5.63 C5351: Power Supply Cooling Fan Motor/1’s failure to turn
16.5.64 C5353: Cooling Fan Motor 2’s failure to turn
16.5.65 C5354: Ozone Ventilation Fan Motor’s failure to turn
16.5.66 C5357: Cooling Fan Motor/1’s failure to turn
16.5.67 C5358: Power Supply Cooling Fan Motor/2’s failure to turn
16.5.68 C6102: Drive Home Sensor malfunction
16.5.69 C6103: Slider Over Run
16.5.70 C6301: Scanner Cooling Fan Motor’s failure to turn
16.5.71 C6704: Image Input Time Out
16.5.72 C6751: CCD clamp/gain adjustment failure
16.5.73 C9401: Exposure Lamp’s failure to turn ON
16.5.74 C9402: Exposure Lamp turning ON at abnormal timing
16.5.75 CA051: Standard Controller configuration failure
16.5.76 CA052:Controller hardware error
16.5.77 CA053: Controller start failure
16.5.78 CC001: Vendor connection failure
16.5.79 CC151: ROM contents error upon startup (MSC)
16.5.80 CC152: ROM contents error upon startup (Scanner)
16.5.81 CC153: ROM contents error upon startup (PRT)
16.5.82 CC154: ROM contents error upon startup (PH)
16.5.83 CC163: ROM contents error (PRT)
16.5.84 CD001: Hard disk initialization abnormality
16.5.85 CD002: JOB RAM save error
16.5.86 CD004: Hard disk access error
16.5.87 CD005: Hard Disk Error 1
16.5.88 CD006: Hard Disk Error 2
16.5.89 CD007: Hard Disk Error 3
16.5.90 CD008: Hard Disk Error 4
16.5.91 CD009: Hard Disk Error 5
16.5.92 CD00A: Hard Disk Error 6
16.5.93 CD00B: Hard Disk Error 7
16.5.94 CD00C: Hard Disk Error 8
16.5.95 CD00D: Hard Disk Error 9
16.5.96 CD00E: Hard Disk Error A
16.5.97 CD00F: Hard disk data transfer error
16.5.98 CD020: Hard disk verify error
16.5.99 CD010: Hard disk unformat
16.5.100 CD011: Hard disk specifications error
16.5.101 CD201: File memory mounting error
16.5.102 CD202: Memory capacity discrepancy
16.5.103 CD203: Memory capacity discrepancy 2
16.5.104 CD211: PCI-SDRAM DMA operation failure
16.5.105 CD212: Compression/extraction timeout detection
16.5.106 CD231: No Fax memory at FAX board mounting
16.5.107 CD241: Encryption board setting error
16.5.108 CD242: Encryption board mounting error
16.5.109 CD251: No JPEG board mounting at JPEG board mount setting
16.5.110 CD3##: NVRAM Data error
16.5.111 CE001: Abnormal message queue
16.5.112 CE003: Task error
16.5.113 CE004: Event error
16.5.114 CE005: Memory access error
16.5.115 CE006: Header access error
16.5.116 CE007: DIMM initialize error
16.5.117 CE002: Message and Method parameter failure
16.5.118 CEEE1: MSC undefined malfunction occurring
16.5.119 CEEE2: Scanner Section undefined malfunction
16.5.120 CEEE3: Engine Section undefined malfunction
17. Power supply trouble
17.1 Machine is not energized at all (PU1 operation check)
17.2 Control panel indicators do not light
17.3 Fusing heaters do not operate
17.4 Power is not supplied to option
17.4.1 Power is not supplied to ADF
17.4.2 Optional paper feed cabinet
17.4.3 Power is not supplied to automatic duplex unit
17.4.4 Finisher
18. Image quality problem
18.1 How to read element date
18.1.1 Table Number
18.1.2 Level History 1
18.1.3 Level History 2
18.2 How to identify problematic part
18.2.1 Initial Check Items
18.3 Solution
18.3.1 IR System: white lines in Sub Scan Direction, white bands in Sub Scan Direction, colored lines in Sub Scan Direction, and colored bands in Sub Scan Direction
18.3.2 Scanner System: white lines in Main Scan Direction, white bands in Main Scan Direction, colored lines in Main Scan Direction, and colored bands in Main Scan Direction
18.3.3 Scanner System: color spots
18.3.4 Scanner System: fog
18.3.5 Scanner System: blurred image, blotchy image
18.3.6 Scanner System: incorrect color image registration, sync shift (lines in main scan direction)
18.3.7 Scanner System: moire
18.3.8 Scanner System: skewed image
18.3.9 Scanner System: distorted image
18.3.10 Scanner System: low image density, rough image
18.3.11 Scanner System: defective ACS
18.3.12 Scanner System: blank copy, black copy
18.3.13 Scanner System: abnormal image
18.3.14 Printer Monocolor: white lines in Sub Scan Direction, white bands in Sub Scan Direction, colored lines colored bands in Sub Scan Direction
18.3.15 Printer Monocolor: white lines in Main Scan Direction, white bands in Main Scan Direction, colored lines in Main Scan Direction, colored bands in Main Scan Direction
18.3.16 Printer Monocolor: uneven density in sub scan direction
18.3.17 Printer Monocolor: uneven density in main scan direction
18.3.18 Printer Monocolor: low image density
18.3.19 Printer Monocolor: gradation reproduction failure
18.3.20 Printer Monocolor: foggy background
18.3.21 Printer Monocolor: void areas, white spots
18.3.22 Printer Monocolor: colored spots
18.3.23 Printer Monocolor: blurred image
18.3.24 Printer Monocolor: blank copy, black copy
18.3.25 Printer Monocolor: uneven image
18.3.26 Printer 4-Color: white lines in sub scan direction, white bands in sub scan direction, colored lines in sub scan direction, and colored bands in sub scan direction
18.3.27 Printer 4-Color: white lines in main scan direction, white bands in main scan direction, colored lines in main scan direction, and colored bands in main scan direction
18.3.28 Printer 4-Color: uneven density in sub scan direction
18.3.29 Printer 4-Color: uneven density in main scan direction
18.3.30 Printer 4-Color: low image density
18.3.31 Printer 4-Color: poor color reproduction
18.3.32 Printer 4-Color: incorrect color image registration
18.3.33 Printer 4-Color: void areas, white spots
18.3.34 Printer 4-Color: colored spots
18.3.35 Printer 4-Color: poor fusing performance, offset
18.3.36 Printer 4-Color: brush effect, blurred image
18.3.37 Printer 4-Color: back marking

APPENDIX
19. Parts layout drawing
19.1 Main unit
19.1.1 IR section
19.1.2 Engine section
19.1.3 Tray 1
19.1.4 Tray 2/Multiple bypass tray
19.2 DF-601 (Option)
19.3 PC103/PC203 (Option)
19.4 PC-403 (Option)
19.5 AD-503 (Option)
19.6 FS-501 (Option)
19.7 JS-601 (Option)
19.8 FS-603 (Option)
19.9 PK-501 (Option)
19.10 Horizontal Transport Unit
19.11 FS-514 (option)
19.12 PK-510 (option)
19.13 MT-501 (option)
19.14 SD-503 (option)
20. Connector layout drawing
21. Timing chart
21.1 Main unit
21.2 Automatic Document Feeder

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Content THEORY OF OPERATION:
Bizhub C250/C252 main unit
GENERAL
1. System configuration
2. Product specifications
2.1 Type
2.2 Functions
2.3 Types of paper
2.4 Maintenance
2.5 Machine specifications
2.6 Operating environment
2.7 Print functions
2.8 Scan functions
3. Center cross section
4. Paper path
4.1 C250 paper path
4.2 C250 paper path
5. Image creation process

COMPOSITION/OPERATION
6. Overall composition
6.1 Timing chart at machine power up
6.2 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 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 shutter mechanism
8.2.5 Laser emission area
8.2.6 Registration control (color shift correction) system
8.2.7 Skew control mechanism
9. Imaging unit section (IU section)
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 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 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 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 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 2nd image transfer section
14.3 Operation
14.3.1 Transfer belt drive mechanism
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 Reversing control of the transfer belt
14.3.8 2nd image transfer roller cleaning
14.3.9 Charge neutralization and separation of paper
14.3.10 Detection of new transfer belt unit
14.3.11 Pressure/retraction control during ACS mode
15. Toner collecting section
15.1 Composition
15.2 Drive
15.3 Operation
15.3.1 Toner collecting mechanism
15.3.2 Waste toner box set detection
15.3.3 Waste toner near-full/full detection control
16. Paper feed section
16.1 Composition
16.1.1 Tray1
16.1.2 Tray2
16.2 Drive
16.2.1 Tray1
16.2.2 Tray2
16.3 Operation
16.3.1 Paper take-up control (tray1)
16.3.2 Paper supply level detection control (tray2)
16.3.3 Paper near-empty/paper empty detection
16.3.4 Paper type setting
16.3.5 Paper size detection control
16.3.6 Paper Interval control (PPM control)
16.3.7 Tray2 paper lifting motion control
17. Bypass section (bizhub C250)
17.1 Drive
17.2 Operation
17.2.1 Bypass paper take-up control
17.2.2 Paper empty detection
17.2.3 Paper width detection
17.2.4 Bypass paper lifting motion control
18. Bypass section (bizhub C252)
18.1 Composition
18.2 Drive
18.3 Operation
18.3.1 Bypass paper take-up control
18.3.2 Paper empty detection
18.3.3 Bypass paper lifting motion control
18.3.4 Paper size detection
19. Registration roller section
19.1 Composition
19.2 Drive
19.3 Operation
19.3.1 Registration roller control
19.3.2 OHP detection
19.3.3 Deceleration control
20. Fusing section
20.1 Composition
20.2 Drive
20.3 Operation
20.3.1 Fusing roller drive control
20.3.2 Heater lamp construction
20.3.3 Thermistor construction
20.3.4 Thermostat construction
20.3.5 Fusing roller pressure/retraction mechanism
20.3.6 Fusing roller small amount rotation control
20.3.7 Paper winding detection control
20.3.8 Fusing temperature control chart
20.3.9 Warm-up control
20.3.10 Temperature control during low power mode
20.3.11 Protecting from the abnormally high temperature
20.3.12 Abnormally high temperature detection (software protection)
20.3.13 Abnormally high temperature detection (hardware protection)
20.3.14 High temperature error detection (thermostat protection)
20.3.15 Detection of a new fusing unit
21. Paper exit section
21.1 Composition
21.2 Drive
22. Image stabilization control
22.1 Overview
22.2 Operation
22.2.1 IDC intensity control
22.2.2 Max. density control
22.2.3 LD (laser diode) intensity adjustment control
22.2.4 Gamma correction control
22.3 Operation timing
22.4 Operation flow
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 Parts operated when the power switch and sub power switch are turned ON
24.2.1 Parts operated when the power switch and sub power switch are turned ON
24.3 Counter control
24.3.1 Construction

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Content Parts List Manual Konica Minolta Bizhub C250:
1. EXTERNAL PARTS
2. CONTROL PANEL
3. IR COVER
4. SCANNER DRIVE SECTION
5. OPTICAL SECTION
6. IR FRAME
7. MAIN FRAME
8. INNER COVER SECTION
9. MPT PAPER TAKE-UP SECTION
10. MANUAL FEED SECTION
11. P/H FRAME SECTION
12. T/C RAIL SECTION
13. HOPPER DRIVE SECTION
14. CONTACT SECTION
15. ERASER SECTION
16. DEVELOPMENT DRIVE SECTION
17. TRANSFER BELT SECTION
18. PAPER TRANSPORT SECTION
19. TRANSFER SECTION
20. RIGHT DOOR SECTION
21. TRANSPORT DRIVE SECTION
22. WASTE TONER TRANSPORT SECTION
23. WASTE TONER BOX SECTION
24. FUSING SECTION
25. FUSING DRIVE SECTION
26. PAPER EXIT SECTION
27. PAPER EXIT DRIVE SECTION
28. REAR DUCT SECTION
29. POWER UNIT
30. ELECTRICAL COMPONENTS
31. MPT CASSETTE TRAY SECTION
32. MPT CASSETTE PAPER TAKE-UP SECTION
33. 2ND CASSETTE PAPER TAKE-UP SECTION
34. 2ND CASSETTE FRAME
35. 2ND CASSETTE DRIVE SECTION
36. 2ND CASSETTE
37. WIRING
38. WIRING ACCESSORIES AND JIGS
39. ACCESSORY PARTS

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Content Parts List Manual Konica Minolta Bizhub C252:
1. EXTERNAL PARTS
2. CONTROL PANEL
3. IR COVER
4. SCANNER DRIVE SECTION
5. OPTICAL SECTION
6. IRFRAME
7. MAIN FRAME
8. INNER COVER SECTION
9. MPT PAPER TAKE-UP SECTION
10. MANUAL FEED SECTION
11. P/H FRAME SECTION
12. T/C RAIL SECTION
13. CONTACT SECTION
14. ERASER SECTION
15. DEVELOPMENT DRIVE SECTION
16. TRANSFER BELT SECTION
17. PAPER TRANSPORT SECTION
18. RIGHT DOOR SECTION
19. TRANSPORT DRIVE SECTION
20. WASTE TONER TRANSPORT SECTION
21. WASTE TONER BOX SECTION
22. FUSING SECTION
23. FUSING DRIVE SECTION
24. PAPER EXIT SECTION
25. PAPER EXIT DRIVE SECTION
26. REAR DUCT SECTION
27. POWER UNIT
28. ELECTRICAL COMPONENTS
29. MPT CASSETTE TRAY SECTION
30. MPT CASSETTE PAPER TAKE-UP SECTION
31. 2ND CASSETTE PAPER TAKE-UP SECTION
32. 2ND CASSETTE FRAME
33. 2ND CASSETTE DRIVE SECTION
34. 2ND CASSETTE
35. WIRING
36. WIRING ACCESSORIES AND JIGS
37. ACCESSORY PARTS

Number of pages: 1611.