**Toshiba e-STUDIO 2330C/2820C/2830C/3520C/3530C/4520C** **Professional Multifunction Color Printers for Demanding Business Environments**
**Advanced Imaging Technology** * **1200 x 1200 dpi resolution:** Produces sharp, precise prints and copies with exceptional detail and clarity. * **5-color toner system:** Expands the color spectrum, delivering vibrant, lifelike images with smooth tonal transitions and accurate color reproduction. * **Toshiba's proprietary toner formulation:** Ensures optimal image quality, longevity, and consistency across a wide range of paper types.
**Exceptional Performance** * **High print speeds:** Up to 45 pages per minute (ppm) in color and 65 ppm in black and white, maximizing productivity and efficiency. * **Fast first-copy-out time:** Less than 7 seconds in color and 5 seconds in black and white, minimizing wait times and enhancing workflow. * **Large paper capacity:** Standard 550-sheet paper tray, expandable to a maximum of 3,650 sheets, ensuring uninterrupted printing and copying sessions.
**Versatile Functionality** * **Multifunction capabilities:** Print, copy, scan, and fax in one compact device, streamlining workflow and reducing equipment footprint. * **Duplex printing:** Supports automatic double-sided printing, reducing paper consumption and saving costs. * **Scanning at 200 dpi (optional):** Allows for high-quality document scanning and electronic document management.
**Robust Construction and Reliability** * **Durable construction:** Engineered to withstand demanding work environments and heavy usage. * **Advanced cooling system:** Maintains optimal operating temperatures, ensuring extended life and reliability. * **Long-lasting components:** Toshiba's renowned build quality ensures durability and minimizes maintenance requirements.
**Intuitive Operation** * **Tiltable touch panel:** Provides easy access to all functions and settings, simplifying operation and reducing the learning curve. * **Customizable user interface:** Allows for tailored workflows and efficient task management. * **Mobile printing and scanning:** Supports printing and scanning from smartphones and tablets, enhancing mobility and accessibility.
**Environmental Consciousness** * **Energy Star certified:** Meets strict energy efficiency standards, reducing environmental impact and operating costs. * **ECO mode:** Conserves energy and toner without compromising image quality. * **Recyclable materials:** Constructed with significant amounts of recycled materials, promoting environmental sustainability.

Service Manual & Service Handbook TOSHIBA e-STUDIO 2330C, e-STUDIO 2820C, e-STUDIO 2830C, e-STUDIO 3520C, e-STUDIO 3530C, e-STUDIO 4520C;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your copier.
You can print, zoom or read any diagram, picture or page from this Service Manual. Every chapter on this manual is fully detailed and contain all the simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of e-STUDIO 2330C, e-STUDIO 2820C, e-STUDIO 2830C, e-STUDIO 3520C, e-STUDIO 3530C, e-STUDIO 4520C photocopier. You can find easily everything what do you need.
To see what contain, please read table of contents:

Content for SERVICE MANUAL:
1. FEATURE.
1.1 Main Feature of e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C

2. SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIES
2.1 Specifications
2.1.1 General
2.1.2 Copy
2.1.3 Print
2.1.4 Scan
2.1.5 e-Filing
2.1.6 Internet Fax
2.1.7 Network Fax
2.2 Accessories
2.3 Options
2.4 Supplies
2.5 System List

3. OUTLINE OF THE MACHINE
3.1 Sectional View
3.1.1 Front side-1
3.1.2 Front side-2
3.1.3 Rear side
3.2 Electric Parts Layout
3.3 Symbols and Functions of Various Components
3.4 System Block Diagram
3.5 Disassembly and Replacement of Covers
3.5.1 Front cover
3.5.2 Inner tray
3.5.3 Tray back cover
3.5.4 Front upper cover
3.5.5 Front right cover
3.5.6 Left upper cover
3.5.7 Left cover
3.5.8 Left lower cover
3.5.9 Left rear cover
3.5.10 Right upper cover
3.5.11 Right rear cover
3.5.12 Right rear hinge cover
3.5.13 Right lower cover
3.5.14 Right front hinge cover
3.5.15 Bypass rear cover
3.5.16 Right inner cover
3.5.17 Upper rear cover
3.5.18 Rear cover-1
3.5.19 Rear cover-2
3.5.20 Rear cover-3
3.5.21 Waste toner cover

4. COPY PROCESS
4.1 General Description
4.1.1 Expression of Colors
4.1.2 4-Step Copy Process
4.2 Description of Operation
4.3 Functions
4.4 Comparison with e-STUDIO2500C/3500C/3510C

5. GENERAL OPERATION
5.1 Overview of Operation
5.2 Description of Operation
5.2.1 Warming-up
5.2.2 Ready (ready for copying)
5.2.3 Drawer feed copying (1st drawer paper feeding)
5.2.4 Bypass feed copying
5.2.5 Interruption copying
5.3 Detection of Abnormality
5.3.1 Types of abnormality
5.3.2 Description of abnormality
5.4 Flow Chart
5.4.1 Power ON to ready
5.4.2 Automatic feed copying

6. CONTROL PANEL
6.1 General Description
6.2 Items Shown on the Display Panel
6.2.1 Display
6.2.2 Message
6.3 Relation between the Equipment State and Operator's Operation
6.4 Description of Operation
6.4.1 Dot matrix LCD circuit
6.4.2 LED display circuit
6.5 Disassembly and Replacement
6.5.1 Stopper
6.5.2 Control panel unit
6.5.3 Panel inverter board (P-INV)
6.5.4 DSP board
6.5.5 KEY board
6.5.6 LCD
6.5.7 Control panel cover

7. SCANNER
7.1 General Description
7.2 Construction
7.3 Functions
7.4 Description of Operation
7.4.1 Scanning operation
7.4.2 Initialization at power-ON
7.5 Electric Circuit Description
7.5.1 Scan motor control circuit
7.5.2 Exposure Lamp Control Circuit
7.5.3 General Description of CCD Control
7.5.4 Automatic Original Size Detection Circuit
7.6 Disassembly and Replacement
7.6.1 Original glass
7.6.2 Lens cover
7.6.3 Automatic original detection sensor (APS sensor)
7.6.4 Exposure lamp (EXP)
7.6.5 Lens unit
7.6.6 Scan motor (M1)
7.6.7 Carriage-1
7.6.8 Inverter board (INV)
7.6.9 Carriage wire / carriage-2
7.6.10 Carriage home position sensor (S6)
7.6.11 Platen sensor (S7)
7.6.12 SLG board (SLG)
7.6.13 Scanner unit cooling fan (M30)
7.6.14 Exposure lamp cooling fan (M32)
7.7 Adjustment of the Scanner Section
7.7.1 Adjustment carriages-1 and -2 positions
7.7.2 Belt tension adjustment of the Scan motor

8. IMAGE PROCESSING
8.1 General Description
8.2 Configuration
8.3 IMAGE PROCESSING PC BOARD (IMG)
8.3.1 Features
8.3.2 Functions of image processing circuit
8.4 SYSTEM CONTROL PC BOARD (SYS)
8.4.1 Features
8.4.2 Functions of image processing circuit
8.5 Image Related Adjustment
8.5.1 Adjustment Order
8.5.2 Adjustment of the Auto-Toner Sensor
8.5.3 Performing Image Quality Control
8.5.4 Adjustment of Color Registration Control
8.5.5 Adjustment of the transfer belt due to environmental factors
8.5.6 Image Dimensional Adjustment
8.5.7 Paper alignment at the registration roller
8.5.8 Image dimensional adjustment at the printing section
8.5.9 Image dimensional adjustment at the scanning section
8.6 Image Quality Adjustment (Copying Function)
8.6.1 Automatic gamma adjustment
8.6.2 Density adjustment
8.6.3 Color balance adjustment
8.6.4 Gamma balance adjustment
8.6.5 Background adjustment
8.6.6 Judgment threshold for ACS (common for copy and scan)
8.6.7 Sharpness adjustment
8.6.8 Setting range correction
8.6.9 Setting range correction (Adjustment of background peak)
8.6.10 Adjustment of smudged/faint text
8.6.11 Color Adjustment of Marker
8.6.12 Beam level conversion setting
8.6.13 Maximum toner density adjustment to paper type
8.6.14 Maximum text density adjustment
8.6.15 Text/Photo reproduction level adjustment
8.6.16 Black reproduction switching at the Twin color copy mode
8.6.17 Black header density level adjustment
8.6.18 Black area adjustment in twin color copy mode
8.6.19 Judgment threshold adjustment for blank originals
8.6.20 Background offsetting adjustment for ADF
8.7 Image Quality Adjustment (Printing Function)
8.7.1 Automatic gamma adjustment
8.7.2 Gamma balance adjustment (Black Mode)
8.7.3 Color balance adjustment (Color Mode)
8.7.4 Adjustment of faint text
8.7.5 Upper limit value at Toner Saving Mode
8.7.6 Maximum toner density adjustment
8.7.7 Fine line enhancement switchover
8.7.8 "PureBlack/PureGray" threshold adjustment (PCL)
8.7.9 "PureBlack/PureGray" threshold adjustment (Twin color mode)
8.7.10 "PureBlack/PureGray" threshold adjustment (PS)
8.7.11 "PureBlack/PureGray" threshold adjustment (XPS)
8.7.12 Toner limit threshold adjustment
8.7.13 Screen switchover
8.7.14 Sharpness adjustment
8.7.15 Offsetting adjustment for background processing
8.8 Image Quality Adjustment (Scanning Function)
8.8.1 Gamma balance adjustment
8.8.2 Density adjustment
8.8.3 Background adjustment (Color Mode)
8.8.4 Judgment threshold for ACS (common for copy and network scan)
8.8.5 Sharpness adjustment
8.8.6 Setting range correction
8.8.7 Setting range correction (Adjustment of background peak)
8.8.8 Fine adjustment of black density
8.8.9 RGB conversion method selection
8.8.10 Adjustment of saturation
8.8.11 Background processing offset adjustment
8.9 Image Quality Adjustment (FAX Function)
8.9.1 Density adjustment
8.9.2 Beam level conversion setting

9. LASER OPTICAL UNIT
9.1 General Description
9.2 Structure
9.3 Electric Circuit Description
9.3.1 Laser diode control circuit
9.3.2 Polygonal motor control circuit
9.3.3 Mirror motor control circuit
9.4 Disassembly and Replacement
9.4.1 Laser optical unit
9.4.2 Shutter unit
9.4.3 Shutter motor (M12)
9.4.4 Shutter status detection sensor (S20)
9.4.5 Slit glass cleaning pad
9.4.6 Polygonal motor
9.5 Image Adjustment in Laser Optical Unit

10. DRIVE SYSTEM
10.1 General Description

11. PAPER FEEDING SYSTEM
11.1 General Descriptions
11.2 Composition
11.3 Functions
11.4 Description of Operation
11.4.1 Drive of rollers
11.4.2 Operation of bypass pickup roller
11.4.3 Operation of drawer pickup roller
11.4.4 Separation of paper
11.4.5 General operation
11.5 Electric Circuit Description
11.5.1 Tray-up motor control circuit
11.5.2 Registration motor control circuit
11.5.3 Feed/Transport motor control circuit
11.6 Disassembly and Replacement
11.6.1 Bypass unit
11.6.2 Hinge assembly
11.6.3 SFB board (SFB)
11.6.4 Bypass feed upper cover
11.6.5 Bypass upper guide
11.6.6 Bypass pickup solenoid (SOL1)
11.6.7 Bypass paper sensor (S40)
11.6.8 Bypass pickup roller
11.6.9 Bypass feed roller
11.6.10 Bypass transport roller
11.6.11 Bypass feed clutch (CLT8)
11.6.12 Bypass separation roller
11.6.13 Bypass feed sensor (S41)
11.6.14 Drawer feeding unit
11.6.15 Tray-up sensor (S31/S35) / Empty sensor (S32/S36)
11.6.16 Paper stock sensor (S33/S37)
11.6.17 Separation roller
11.6.18 Feed roller
11.6.19 Pickup roller
11.6.20 Drawer feed clutch (CLT3/CLT6)
11.6.21 Tray-up motor (M21)
11.6.22 Tray drive unit
11.6.23 2nd drawer transport clutch (Low speed) (CLT4)
11.6.24 2nd drawer transport clutch (High speed) (CLT5)
11.6.25 1st drawer detection switch (SW5) / 2nd drawer detection switch (SW6)
11.6.26 Paper feed guide assembly
11.6.27 2nd drawer feed sensor (S34)
11.6.28 Side cover switch (SW4)
11.6.29 Registration guide
11.6.30 Registration sensor (S28)
11.6.31 1st drawer feed sensor (S30)
11.6.32 Registration roller (Rubber)
11.6.33 Registration motor unit
11.6.34 Registration motor (M19)
11.6.35 Registration roller (Metal)
11.6.36 Paper dust holder
11.6.37 1st drawer transport clutch (Low speed) (CLT2)
11.6.38 Feed/transport motor (M20)
11.6.39 Feed/transport gear unit
11.6.40 1st drawer transport clutch (High speed) (CLT1)
11.6.41 1st drawer transport roller
11.6.42 2nd drawer transport roller
11.7 Adjustment of the Paper Feeding System
11.7.1 Sheet sideways deviation caused by paper feeding

12. PROCESS UNIT RELATED SECTION
12.1 General description
12.2 Composition
12.3 Functions
12.4 Description of Operation
12.4.1 Drum phase registration mechanism
12.5 Electric Circuit Description
12.5.1 High-voltage transformer control circuit
12.5.2 Drum Temperature Detection Circuit
12.5.3 Drum motor control circuit
12.5.4 Drum switching motor control circuit
12.6 Disassembly and Replacement
12.6.1 Process unit (EPU)
12.6.2 Process cover
12.6.3 Cleaning unit/ Developer unit
12.6.4 Main charger assembly
12.6.5 Main charger cleaner
12.6.6 Main charger grid
12.6.7 Needle electrode
12.6.8 Drum
12.6.9 Drum cleaning blade
12.6.10 Drum thermistor (THM1, THM2)
12.6.11 Discharge LED (ERS-Y, ERS-M, ERS-C, ERS-K)
12.6.12 Needle electrode cleaner detection sensor (S21)
12.6.13 Drum drive unit
12.6.14 Drum motor (M10)
12.6.15 Drum switching motor (M11)
12.6.16 Drum switching detection sensor (S19)
12.6.17 K drum phase sensor (S44)
12.6.18 Color drum phase sensor (S43)
12.7 Adjustment of the Process unit Related Section
12.7.1 High-Voltage Transformer Setting

13. DEVELOPER UNIT
13.1 General Description
13.2 Composition
13.3 Functions
13.4 Electrical Circuit Description
13.4.1 Temperature/humidity detection circuit
13.4.2 Toner motor control circuit
13.4.3 Waste toner transport motor control circuit
13.4.4 Waste toner paddle motor control circuit
13.4.5 Auto-toner Circuit
13.5 Disassembly and Replacement
13.5.1 Waste toner box
13.5.2 Developer filter
13.5.3 Developer material
13.5.4 Doctor blade
13.5.5 Auto-toner sensor (S22, S23, S24, S25)
13.5.6 Developer sleeve
13.5.7 Mixer
13.5.8 Waste toner transport motor (M31)
13.5.9 Temperature / humidity sensor (S12)
13.5.10 Waste toner box full detection sensor (S13)
13.5.11 Waste toner paddle motor lock detection sensor (S14)
13.5.12 Waste toner paddle motor (M6)
13.5.13 Waste toner transport unit
13.5.14 Waste toner cover open/close detection switch (SW8)
13.5.15 Auger lock detection sensor (S42)
13.5.16 Developer unit motor (M9)
13.5.17 Developer drive unit
13.5.18 Toner motor assembly
13.5.19 Toner motor (M2, M3, M4, M5)
13.5.20 Toner cartridge detection sensor (S8, S9, S10, S11)
13.5.21 Ozone filter-1
13.5.22 EPU cooling fan (M33)
13.5.23 Ozone exhaust duct
13.5.24 Ozone exhaust fan (M24)
13.5.25 Internal cooling fan (M23)
13.5.26 Ozone filter-2
13.6 Adjustment of the developer unit
13.6.1 Adjustment of the Auto-Toner Sensor
13.6.2 Adjustment of the doctor-to-sleeve gap

14. TRANSFER UNIT
14.1 General Descriptions
14.2 Composition
14.3 Functions
14.4 General description of operation
14.4.1 Printing in the color modes
14.4.2 Printing in the black mode
14.4.3 Color registration control
14.5 Electric Circuit Description
14.5.1 Transfer belt motor control circuit
14.5.2 1st transfer roller cam motor control circuit
14.6 Disassembly and Replacement
14.6.1 Transfer belt cleaning unit
14.6.2 Transfer belt cleaning blade / Blade seal
14.6.3 Transfer belt unit (TBU)
14.6.4 Transfer belt
14.6.5 Drive roller
14.6.6 1st transfer roller
14.6.7 2nd transfer facing roller / 2nd transfer facing roller cleaning mylar
14.6.8 Tension roller
14.6.9 1st transfer roller cam motor (M8)
14.6.10 1st transfer roller status detection sensor (S15)
14.6.11 2nd transfer unit (TRU)
14.6.12 2nd transfer roller
14.6.13 TRU cover
14.6.14 Paper clinging detection sensor (S27)
14.6.15 2nd transfer roller position detection sensor (S29)
14.6.16 Transfer belt motor (M7)
14.6.17 Transfer cover switch (SW3)
14.7 Adjustment of the Transfer Unit
14.7.1 Adjustment of the transfer belt due to environmental factors
14.7.2 Adjustment of Gap between Transfer Belt Unit (TBU) Drive Gears

15. IMAGE QUALITY CONTROL
15.1 General Description
15.2 Composition
15.3 Principle of the Sensor
15.4 Flow Chart of Control Procedure
15.5 Disassembly and Replacement
15.5.1 Image quality control unit
15.5.2 Image position aligning sensor (front) (S16)
15.5.3 Image position aligning sensor (rear) (S17)
15.5.4 Image quality sensor (S18)
15.5.5 Sensor shutter solenoid (SOL2)
15.6 Adjustment of the Image Quality Control
15.6.1 Parforming Image Quality Control

16. FUSER UNIT / PAPER EXIT SECTION
16.1 General Description
16.2 Composition
16.3 Functions
16.4 Description of Operation
16.5 Electric Circuit Description
16.5.1 Fuser unit control circuit
16.5.2 Fuser motor control circuit
16.5.3 Exit motor control circuit
16.6 Disassembly and Replacement
16.6.1 Fuser unit
16.6.2 Front side cover
16.6.3 Rear side cover
16.6.4 Heat roller cover
16.6.5 Pressure roller cover
16.6.6 Transport guide
16.6.7 Separation finger unit / Separation finger
16.6.8 Pressure roller / Pressure roller lamp (LAMP3)
16.6.9 Separation plate / Fuser belt unit / Heater lamp (center / side / sub)
16.6.10 Fuser belt / Heat roller / Fuser belt guide / Fuser roller
16.6.11 Pressure roller thermostat (THMO3)
16.6.12 Pressure roller center thermistor (THM4) /Pressure roller rear thermistor (THM5)
16.6.13 Fuser belt center thermostat (THMO1)
16.6.14 Fuser belt rear thermostat (THMO2)
16.6.15 Fuser belt front thermistor (THM3)
16.6.16 Exit sensor (S26)
16.6.17 Exit unit
16.6.18 Upper exit roller / Lower exit roller
16.6.19 Fuser belt center thermopile(THMP1) / Fuser belt rear thermopile (THMP2)
16.6.20 Fuser motor (M17)
16.6.21 Exit section drive unit
16.6.22 Fuser drive unit
16.6.23 Fuser/exit section cooling fan (M25) / Exit motor (M18)
16.7 Adjustment of the Separation Plate Gap

17. AUTOMATIC DUPLEXING UNIT (ADU)
17.1 General Description
17.2 Composition
17.3 Functions
17.4 Drive of ADU
17.5 Description of Operations
17.6 Flow Chart
17.7 Disassembly and Replacement
17.7.1 ADU maintenance position
17.7.2 Automatic Duplexing Unit (ADU)
17.7.3 ADU inside rear cover
17.7.4 ADU opening/closing switch (SW7)
17.7.5 ADU board (ADU)
17.7.6 ADU cover
17.7.7 Paper guide
17.7.8 ADU clutch (CLT7)
17.7.9 ADU drive unit / ADU motor (M22)
17.7.10 Upper transport roller
17.7.11 Middle transport roller
17.7.12 Lower transport roller
17.7.13 ADU entrance sensor (S38)
17.7.14 ADU exit sensor (S39)
17.7.15 ADU lower cover
17.7.16 ADU upper cover assembly
17.7.17 Cover interlock switch (SW2)

18. POWER SUPPLY UNIT
18.1 General description
18.2 Construction
18.3 Operation of DC Output Circuits
18.4 Output Channel
18.5 Fuse
18.6 Configuration of Power Supply Unit
18.7 Sequence of Power Supply
18.8 AC Wire Harness

19. PREVENTIVE MAINTENANCE (PM)
19.1 General Description
19.2 General Descriptions for PM Procedure
19.3 PM Support Mode
19.3.1 General Description
19.3.2 Operational flow
19.3.3 Operational screen
19.3.4 Access tree
19.4 Work flow of parts replacement
19.5 Preventive Maintenance Checklist
19.5.1 Scanner
19.5.2 Laser unit
19.5.3 Feed unit
19.5.4 Automatic duplexing unit
19.5.5 Bypass feed unit
19.5.6 Main charger
19.5.7 Drum/Cleaner unit, Cleaner related section
19.5.8 Developer unit (K, Y, M, and C)
19.5.9 Waste Toner Box
19.5.10 Transfer belt unit / Transfer belt cleaning unit
19.5.11 Image quality control unit
19.5.12 2nd transfer roller unit
19.5.13 Fuser unit
19.5.14 Exit unit
19.5.15 RADF (MR-3018)
19.5.16 PFP (KD-1023)
19.5.17 LCF (KD-1024)
19.6 Storage of Supplies and Replacement Parts
19.7 PM KIT
19.8 Maintenance Part List
19.9 Grease List
19.10Operational Items in Overhauling

20. FIRMWARE UPDATING
20.1 Firmware Updating with USB Media
20.1.1 Master data/System ROM/Engine ROM/Scanner ROM
20.2 Firmware Updating with PWA-DWNLD-350-JIG2
20.2.1 Writing the data to the download jig (PWA-DWNLD-350-JIG2)
20.2.2 System ROM
20.2.3 Engine ROM
20.3 Firmware Updating with K-PWA-DLM-320
20.3.1 Scanner ROM
20.3.2 RADF firmware (MR-3018)
20.3.3 Finisher firmware (MJ-1101)
20.3.4 Converter Firmware (MJ-1101)
20.3.5 Hole punch unit firmware (MJ-6101)
20.3.6 Finisher firmware/Saddle stitcher firmware (MJ-1030)
20.3.7 Finisher firmware (MJ-1031)
20.3.8 Fax unit firmware (GD-1250)
20.4 Confirmation of the updated data
20.5 When Firmware Updating Fails
20.5.1 Procedure
20.5.2 Flow chart for correcting USB update failure

21. REPLACEMENT OF PC BOARDS/HDD
21.1 Removal and Installation of PC Boards/HDD
21.1.1 Hard disk (HDD)
21.1.2 Board cover
21.1.3 FAX cover
21.1.4 SYS/HDD cooling fan
21.1.5 SYS board
21.1.6 IMG board
21.1.7 LGC board
21.1.8 Switching regulator
21.1.9 Hign-voltage tranformer (HVT)
21.1.10 FIL board
21.1.11 Board case
21.1.12 SRAM board
21.1.13 SRAM board
21.2 Precautions, Procedures and Settings for Replacing PC Boards and HDD
21.2.1 Precautions when replacing PC boards
21.2.2 HDD fault diagnosis
21.2.3 Precautions and procedures when replacing the HDD
21.2.4 Precautions and Procedures when replacing the SYS board
21.2.5 Procedures and settings when replacing the SLG board
21.2.6 Precautions and procedure when replacing the SRAM board(for the SYS board)
21.2.7 Procedures and settings when replacing SRAM board (for LGC board)
21.3 Precautions for Disposal of the HDD and PC boards
21.3.1 Precautions when disposing of the HDD
21.3.2 Precautions when disposing of the SYS board
21.3.3 Precautions when disposing of the SRAM board

22. BACKUP FUNCTION
22.1 Data Cloning
22.1.1 General description
22.1.2 Precautions
22.1.3 Backup files
22.1.4 Cloning procedure
22.2 AES Data Encryption Function Setting
22.2.1 General description
22.2.2 Precautions
22.2.3 Setting procedure
22.2.4 Procedure for disabling data encryption function
22.2.5 Procedure for discarding HDD when data encryption function is enabled
22.3 Assist Mode
22.3.1 Assist Mode
22.3.2 Operating Procedure of Assist Mode

23. SELF-DIAGNOSTIC MODE
23.1 Input check (Test mode 03)
23.2 Output check (test mode 03)
23.3 Test print mode (test mode 04)
23.4 List Printing

24. ADJUSTMENT MODE (05)
24.1 Classification List of Adjustment Mode (05)
24.2 Operating Procedure
24.3 Test print pattern in Adjustment Mode (05)
24.4 Process
24.5 Image Processing
24.6 System
24.7 Scanner
24.8 Printer

25. SETTING MODE (08)
25.1 Classification List of Setting Mode (08)
25.2 Operating Procedure
25.3 Process
25.4 Scanner
25.5 Printer
25.6 Counter
25.7 Image Processing
25.8 System
25.9 Pixel counter
25.9.1 Outline
25.9.2 Pixel counter related code
25.10PM support mode related code
25.11Default setting / restore setting of the EFI Printer Board
25.12S-ACS setting (08-9934)
25.12.1 Outline
25.12.2 Switching operation and performance
25.12.3 Printing status
25.12.4 Setting
25.12.5 Precautions for setting

26. ERROR CODE AND TROUBLESHOOTING
26.1 General Descriptions
26.2 Error Code List
26.2.1 Jam
26.2.2 Service call
26.2.3 Error in Internet FAX / Scanning Function
26.2.4 Printer function error
26.3 Diagnosis and Prescription for Each Error Code
26.3.1 Paper transport jam (paper exit section)
26.3.2 Paper misfeeding
26.3.3 Paper transport jam
26.3.4 Other paper jam
26.3.5 Cover open jam
26.3.6 RADF jam
26.3.7 Jam in bridge unit
26.3.8 Paper jam in finisher section
26.3.9 Paper jam in saddle stitcher section
26.3.10 Paper jam in puncher unit
26.3.11 Other paper jam
26.3.12 Paper feeding system related service call
26.3.13 Scanning system related service call
26.3.14 Fuser unit related service call
26.3.15 Communication related service call
26.3.16 RADF related service call
26.3.17 Circuit related service call
26.3.18 Laser optical unit related service call
26.3.19 Finisher related service call
26.3.20 Image control related service call
26.3.21 Copy process related service call
26.3.22 Other service call
26.3.23 Error in Internet FAX / Scanning Function
26.3.24 Printer function error
26.4 Other errors
26.4.1 Operation cannot be performed (operation from the control panel is not successful) after installing the option(s) such as Wireless LAN module and/or Parallel board
26.4.2 The connection to the Wireless LAN cannot be made even though it is setto "Enabled"
26.4.3 "Start page" cannot be printed when the firmware of the equipment or the
system software of the EFI printer board (GA-1211) is updated after the
EFI printer board (GA-1211) is installed in the equipment
26.5 Troubleshooting for the Image
26.5.1 Color deviation
26.5.2 Uneven pitch and jitter image
26.5.3 Poor image density, color reproduction and gray balance
26.5.4 Background fogging
26.5.5 Moire /lack of sharpness
26.5.6 Toner offset
26.5.7 Blurred image
26.5.8 Poor fusing
26.5.9 Blank print
26.5.10 Solid print
26.5.11 White banding (in feeding direction)
26.5.12 White banding (at right angles to feeding direction)
26.5.13 Skew (slantwise copying)
26.5.14 Color banding (in feeding direction)
26.5.15 Color banding (at right angles to feeding direction)
26.5.16 White spots
26.5.17 Poor transfer
26.5.18 Uneven image density (in feeding direction)
26.5.19 Uneven image density (at right angles to feeding direction)
26.5.20 Faded image (low density)
26.5.21 Image dislocation in feeding direction
26.5.22 Image jittering
26.5.23 Poor cleaning
26.5.24 Uneven light distribution
26.5.25 Blotched image
26.5.26 Stain on the paper back side
26.5.27 White void in the halftone
26.5.28 Paper wrinkle
26.5.29 White void in the halftone
26.5.30 Faint image (immediately after equipment installation)

27. REMOTE SERVICE
27.1 Auto Supply Order
27.1.1 Outline
27.1.2 Setting Item
27.1.3 Setting procedure
27.1.4 Order Sheet Format
27.2 Service Notification
27.2.1 Outline
27.2.2 Setting
27.2.3 Items to be notified

28. SETTING / ADJUSTMENT OF OPTION
28.1 Removal and Installation of Options
28.1.1 MR-3018 (Reversing Automatic Document Feeder (RADF))
28.1.2 KD-1023 (Paper Feed Pedestal (PFP))
28.1.3 KD-1024 (Large Capacity Feeder (LCF))
28.1.4 MJ-1101 (Finisher)
28.1.5 MJ-1030 (Saddle Stitch Finisher)
28.1.6 MJ-1031 (Hanging Finisher)
28.1.7 MJ-6004 (Hole punch unit)
28.1.8 MJ-6101 (Hole punch unit)
28.1.9 KN-4520 (Bridge unit)
28.2 Adjustment of the Finisher (MJ-1101)
28.2.1 Adjusting the alignment position
28.2.2 Adjusting the stapling position
28.2.3 B4-size recycled paper mode settings
28.3 Adjustment of the Saddle Stitch Finisher (MJ-1030)
28.3.1 Adjusting the alignment position
28.3.2 Adjusting the stapling position
28.3.3 B4-size recycled paper mode settings
28.4 Adjustment of the Hanging Finisher (MJ-1031)
28.4.1 Adjustment of the offset solenoid
28.4.2 Position adjustment of the stapler unit
28.5 Adjustment of the RADF (MR-3018)
28.5.1 Adjustment of RADF position
28.5.2 Adjustment of RADF height
28.5.3 Adjustment of skew
28.5.4 Adjustment of the leading edge position
28.5.5 Adjustment of horizontal position
28.5.6 Adjustment of copy ratio
28.5.7 Adjustment of RADF opening/closing sensor

29. EXTERNAL COUNTERS
29.1 Outline
29.2 Signal
29.3 Notices

30. PC BOARDS

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Content for SERVICE HANDBOOK:
1. SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIES
1.1 Specifications
1.1.1 General
1.1.2 Copy
1.1.3 Print
1.1.4 Scan
1.1.5 e-Filing
1.1.6 Internet Fax
1.1.7 Network Fax
1.2 Accessories
1.3 Options
1.4 Supplies
1.5 System List

2. SELF-DIAGNOSTIC MODE
2.1 Input check (Test mode 03)
2.2 Output check (test mode 03)
2.3 Test print mode (test mode 04)
2.4 List Printing
2.5 ADJUSTMENT MODE (05)
2.5.1 Classification List of Adjustment Mode (05)
2.5.2 Operating Procedure
2.5.3 Test print pattern in Adjustment Mode (05)
2.5.4 Process
2.5.5 Image Processing
2.5.6 System
2.5.7 Scanner
2.5.8 Printer
2.6 SETTING MODE (08)
2.6.1 Classification List of Setting Mode (08)
2.6.2 Operating Procedure
2.6.3 Process
2.6.4 Printer
2.6.5 Counter
2.6.6 System
2.6.7 Pixel counter
2.6.8 PM support mode related code
2.6.9 Default setting / restore setting of the EFI Printer Board
2.6.10 S-ACS setting (08-9934)

3. ADJUSTMENT
3.1 Image Related Adjustment
3.1.1 Adjustment Order
3.1.2 Adjustment of the Auto-Toner Sensor
3.1.3 Performing Image Quality Control
3.1.4 Adjustment of Color Registration Control
3.1.5 Adjustment of the transfer belt due to environmental factors
3.1.6 Image Dimensional Adjustment
3.1.7 Paper alignment at the registration roller
3.1.8 Image dimensional adjustment at the printing section
3.1.9 Image dimensional adjustment at the scanning section
3.2 Image Quality Adjustment (Copying Function)
3.2.1 Automatic gamma adjustment
3.2.2 Density adjustment
3.2.3 Color balance adjustment
3.2.4 Gamma balance adjustment
3.2.5 Background adjustment
3.2.6 Judgment threshold for ACS (common for copy and scan)
3.2.7 Sharpness adjustment
3.2.8 Setting range correction
3.2.9 Adjustment of smudged/faint text
3.2.10 Color Adjustment of Marker
3.2.11 Beam level conversion setting
3.2.12 Maximum toner density adjustment to paper type
3.2.13 Maximum text density adjustment
3.2.14 Text/Photo reproduction level adjustment
3.2.15 Black reproduction switching at the Twin color copy mode
3.2.16 Black header density level adjustment
3.2.17 Black area adjustment in twin color copy mode
3.2.18 Judgment threshold adjustment for blank originals
3.2.19 Background offsetting adjustment for ADF
3.3 Image Quality Adjustment (Printing Function)
3.3.1 Automatic gamma adjustment
3.3.2 Gamma balance adjustment (Black Mode)
3.3.3 Color balance adjustment
3.3.4 Adjustment of faint text
3.3.5 Upper limit value at Toner Saving Mode
3.3.6 Maximum toner density adjustment
3.3.7 Fine line enhancement switchover
3.3.8 "PureBlack/PureGray" threshold adjustment (PCL)
3.3.9 "PureBlack/PureGray" threshold adjustment (Twin color mode)
3.3.10 "PureBlack/PureGray" threshold adjustment (PS)
3.3.11 "PureBlack/PureGray" threshold adjustment (XPS)
3.3.12 Toner limit threshold adjustment
3.3.13 Screen switchover
3.3.14 Sharpness adjustment
3.3.15 Thin line width lower limit adjustment
3.3.16 Offsetting adjustment for background processing
3.4 Image Quality Adjustment (Scanning Function)
3.4.1 Gamma balance adjustment
3.4.2 Density adjustment
3.4.3 Background adjustment (Color Mode)
3.4.4 Judgment threshold for ACS (common for copy and network scan)
3.4.5 Sharpness adjustment
3.4.6 Setting range correction
3.4.7 Fine adjustment of black density
3.4.8 RGB conversion method selection
3.4.9 Adjustment of saturation
3.4.10 Background processing offset adjustment
3.5 Image Quality Adjustment (FAX Function)
3.5.1 Density adjustment
3.5.2 Beam level conversion setting
3.6 Adjustment of the Process unit Related Section
3.6.1 High-Voltage Transformer Setting
3.7 Adjustment of the Scanner Section
3.7.1 Adjustment carriages-1 and -2 positions
3.7.2 Belt tension adjustment of the Scan motor
3.8 Adjustment of the Paper Feeding System
3.8.1 Sheet sideways deviation caused by paper feeding
3.9 Adjustment of the developer unit
3.9.1 Adjustment of the Auto-Toner Sensor
3.9.2 Adjustment of the doctor-to-sleeve gap
3.10 Adjustment of the Transfer Unit
3.10.1 Adjustment of the transfer belt due to environmental factors
3.10.2 Adjustment of Gap between Transfer Belt Unit (TBU) Drive Gears
3.11 Adjustment of the Separation Plate Gap

4. BACKUP FUNCTION
4.1 Data Cloning
4.1.1 General description
4.1.2 Precautions
4.1.3 Backup files
4.1.4 Cloning procedure
4.2 AES Data Encryption Function Setting
4.2.1 General description
4.2.2 Precautions
4.2.3 Setting procedure
4.2.4 Procedure for disabling data encryption function
4.2.5 Procedure for discarding HDD when data encryption function is enabled
4.3 Assist Mode
4.3.1 Assist Mode
4.3.2 Operating Procedure of Assist Mode

5. PREVENTIVE MAINTENANCE (PM).
5.1 General Description
5.2 PM Display
5.2.1 General Description
5.2.2 PM Display Conditions
5.2.3 PM Display Contents
5.2.4 Counter Clearing
5.3 General Descriptions for PM Procedure
5.4 PM Support Mode
5.4.1 General Description
5.4.2 Operational flow
5.4.3 Operational screen
5.4.4 Access tree
5.5 Work flow of parts replacement
5.6 Preventive Maintenance Checklist
5.6.1 Scanner
5.6.2 Laser unit
5.6.3 Feed unit
5.6.4 Automatic duplexing unit
5.6.5 Bypass feed unit
5.6.6 Main charger
5.6.7 Drum/Cleaner unit, Cleaner related section
5.6.8 Developer unit (K, Y, M, and C)
5.6.9 Waste Toner Box
5.6.10 Transfer belt unit / Transfer belt cleaning unit
5.6.11 Image quality control unit
5.6.12 2nd transfer roller unit
5.6.13 Fuser unit
5.6.14 Exit unit
5.6.15 RADF (MR-3018)
5.6.16 PFP (KD-1023)
5.6.17 LCF (KD-1024)
5.7 Storage of Supplies and Replacement Parts
5.8 PM KIT
5.9 Maintenance Part List
5.10 Grease List
5.11 Operational Items in Overhauling

6. ERROR CODE AND TROUBLESHOOTING
6.1 Error Code List
6.1.1 Jam
6.1.2 Service call
6.1.3 Error in Internet FAX / Scanning Function
6.1.4 Printer function error
6.1.5 TopAccess related error
6.2 Diagnosis and Prescription for Each Error Code
6.2.1 Paper transport jam (paper exit section)
6.2.2 Paper misfeeding
6.2.3 Paper transport jam
6.2.4 Other paper jam
6.2.5 Cover open jam
6.2.6 RADF jam
6.2.7 Jam in bridge unit
6.2.8 Paper jam in finisher section
6.2.9 Paper jam in saddle stitcher section
6.2.10 Paper jam in puncher unit
6.2.11 Other paper jam
6.2.12 Paper feeding system related service call
6.2.13 Scanning system related service call
6.2.14 Fuser unit related service call
6.2.15 Communication related service call
6.2.16 RADF related service call
6.2.17 Circuit related service call
6.2.18 Laser optical unit related service call
6.2.19 Finisher related service call
6.2.20 Image control related service call
6.2.21 Copy process related service call
6.2.22 Other service call
6.2.23 Error in Internet FAX / Scanning Function
6.2.24 Printer function error
6.2.25 TopAccess related error

7 REPLACEMENT OF PC BOARDS/HDD
7.1 Removal and Installation of PC Boards/HDD
7.1.1 Hard disk (HDD)
7.1.2 Board cover
7.1.3 FAX cover
7.1.4 SYS/HDD cooling fan
7.1.5 SYS board
7.1.6 IMG board
7.1.7 LGC board
7.1.8 Switching regulator
7.1.9 High-voltage transformer (HVT)
7.1.10 FIL board
7.1.11 Board case
7.1.12 SRAM board
7.1.13 SRAM board
7.2 Precautions, Procedures and Settings for Replacing PC Boards and HDD
7.2.1 Precautions when replacing PC boards
7.2.2 HDD fault diagnosis
7.2.3 Precautions and procedures when replacing the HDD
7.2.4 Precautions and Procedures when replacing the SYS board
7.2.5 Procedures and settings when replacing the SLG board
7.2.6 Precautions and procedure when replacing the SRAM board (for the SYS board) 7-25
7.2.7 Procedures and settings when replacing SRAM board (for LGC board)
7.2.8 Firmware confirmation after the PC board/HDD replacement
7.2.9 Electronic key re-registration using the one-time dongle
7.3 Precautions for Installation of GP-1070 and Disposal of HDD/Board
7.3.1 Precautions for Installation of GP-1070 and Disposal of HDD/Board
7.3.2 Precautions when disposing of the SYS board
7.3.3 Precautions when disposing of the SRAM board

8 FIRMWARE UPDATING
8.1 Firmware Updating with USB Media
8.1.1 Master data/System ROM/Engine ROM/Scanner ROM
8.1.2 Imaging Acceleration Board ROM (GE-1170)
8.2 Firmware Updating with PWA-DWNLD-350-JIG2
8.2.1 Writing the data to the download jig (PWA-DWNLD-350-JIG2)
8.2.2 System ROM
8.2.3 Engine ROM
8.3 Firmware Updating with K-PWA-DLM-320
8.3.1 Scanner ROM
8.3.2 RADF firmware (MR-3018)
8.3.3 Finisher firmware (MJ-1101)
8.3.4 Converter Firmware (MJ-1101)
8.3.5 Hole punch unit firmware (MJ-6101)
8.3.6 Finisher firmware/Saddle stitcher firmware (MJ-1030)
8.3.7 Finisher firmware (MJ-1031)
8.3.8 Fax unit firmware (GD-1250)
8.4 Confirmation of the updated data
8.5 When Firmware Updating Fails
8.5.1 Procedure
8.5.2 Flow chart for correcting USB update failure

9 POWER SUPPLY UNIT
9.1 General description
9.2 Construction
9.3 Operation of DC Output Circuits
9.4 Output Channel
9.5 Fuse
9.6 Configuration of Power Supply Unit
9.7 Sequence of Power Supply
9.8 AC Wire Harness

10 DC WIRE HARNESS / ELECTRIC PARTS LAYOUT
10.1 DC Wire Harness
10.2 Electric Parts Layout

Numbers of pages: 1800.