Toshiba e-studio2330c User manual

SERVICEMANUAL
MULTIFUNCTIONAL DIGITAL COLOR SYSTEMS
e-STUDIO2330C/2820C/2830C
e-STUDIO3520C/3530C/4520C
Model:FC-2330C/2820C/2830C/3520C/3530C/4520C
Publish Date: March, 2008
File No. SME070008E0
R070921E3500-TTEC
Ver05_2009-01

Trademarks
• The official name of Windows 95 is Microsoft Windows 95 Operating System.
• The official name of Windows 98 is Microsoft Windows 98 Operating System.
• The official name of Windows Me is Microsoft Windows Millennium Edition Operating System.
• The official name of Windows 2000 is Microsoft Windows 2000 Operating System.
• The official name of Windows XP is Microsoft Windows XP Operating System.
• Microsoft, Windows, Windows NT, Windows Vista and the brand names and product names of other
Microsoft products are trademarks or registered trademarks of Microsoft Corporation in the U.S.
and/or other countries.
• Apple, AppleTalk, Macintosh, and Mac are trademarks of Apple Computer, Inc. in the U.S. and other
countries.
• PostScript is a trademark of Adobe Systems Incorporated.
• NOVELL, NetWare, and NDS are trademarks or registered trademarks of Novell, Inc.
• FLOIL is a registrated trademark of Kanto Kasei Ltd. CORPORATION
• Mylar is a registered trademark of DuPont Teijin Films U.S. Limited Partnership.
• Molykote is a registered trademark of Dow Corning Corporation.
• Other company names and product names in this manual are the trademarks of their respective
companies.
© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
Under the copyright laws, this manual cannot be reproduced in any form without prior written permission
of TOSHIBA TEC CORPORATION. No patent liability is assumed, however, with respect to the use of the
information contained herein.

GENERAL PRECAUTIONS REGARDING THE SERVICE FOR
e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
The installation and service should be done by a qualified service
technician.
1. Transportation/Installation
- When transporting/installing the equipment, employ four persons and be sure to hold the
positions as shown in the figure.
The equipment is quite heavy and weighs approximately 121 kg (266.75 lb.) or 123 kg (271.16
lb.), therefore pay full attention when handling it.
- Be sure not to hold the movable parts or units (e.g. the control panel, ADU or RADF) when
transporting the equipment.
- Be sure to use a dedicated outlet with AC 110 V / 13.2 A, 115 V or 127 V / 12 A, 220-240 V / 8 A
for its power source.
- The equipment must be grounded for safety.
- Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration and
direct sunlight.
- Provide proper ventilation since the equipment emits a slight amount of ozone.
- To insure adequate working space for the copying operation, keep a minimum clearance of 80
cm (32”) on the left, 80 cm (32”) on the right and 10 cm (4”) on the rear.
- The equipment shall be installed near the socket outlet and shall be accessible.
- Be sure to fix and plug in the power cable securely after the installation so that no one trips over
it.
- If the unpacking place and where the equipment is to be installed differ, perform image quality
adjustment (automatic gamma adjustment) according to the temperature and humidity of the
place of installation and the paper to be used.

2. General Precautions at Service
- Be sure to turn the power OFF and unplug the power cable during service (except for the service
should be done with the power turned ON).
- Unplug the power cable and clean the area around the prongs of the plug and socket outlet once
a year or more. A fire may occur when dust lies on this area.
- When the parts are disassembled, reassembly is the reverse of disassembly unless otherwise
noted in this manual or other related documents. Be careful not to install small parts such as
screws, washers, pins, E-rings, star washers, harnesses in the wrong places.
- Basically, the equipment should not be operated with any parts removed or disassembled.
- The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband
since the ICs on it may be damaged due to static electricity.
- Avoid expose to laser beam during service. This equipment uses a laser diode. Be sure not to
expose your eyes to the laser beam. Do not insert reflecting parts or tools such as a screwdriver
on the laser beam path. Remove all reflecting metals such as watches, rings, etc. before starting
service.
- Be sure not to touch high-temperature sections such as the exposure lamp, fuser unit, damp
heater and areas around them.
- Be sure not to touch high-voltage sections such as the chargers, transfer belt, 2nd transfer roller,
developer, high-voltage transformer, exposure lamp control inverter, inverter for the LCD
backlight and power supply unit. Especially, the board of these components should not be
touched since the electric charge may remain in the capacitors, etc. on them even after the
power is turned OFF.
- Make sure that the equipment will not operate before touching potentially dangerous places (e.g.
rotating/operating sections such as gears, belts pulleys, fans and laser beam exit of the laser
optical unit).
- Be careful when removing the covers since there might be the parts with very sharp edges
underneath.
- When servicing the equipment with the power turned ON, be sure not to touch live sections and
rotating/operating sections. Avoid exposing your eyes to laser beam.
- Use designated jigs and tools.
- Use recommended measuring instruments or equivalents.
- Return the equipment to the original state and check the operation when the service is finished.
- Be very careful to treat the touch panel gently and never hit it. Breaking the surface could cause
malfunctions.
3. Important Service Parts for Safety
- The breaker, door switch, fuse, thermostat, thermofuse, thermistor, IC-RAMs including lithium
batteries, etc. are particularly important for safety. Be sure to handle/install them properly. If
these parts are short-circuited and their functions become ineffective, they may result in fatal
accidents such as burnout. Do not allow a short-circuit or do not use the parts not recommended
by Toshiba TEC Corporation.
Caution: Before using the wristband, unplug the power cable of the equipment and
make sure that there are no charged objects which are not insulated in the
vicinity.

4. Cautionary Labels
- During servicing, be sure to check the rating plate and cautionary labels such as “Unplug the
power cable during service”, “CAUTION. HOT”, “CAUTION. HIGH VOLTAGE”, “CAUTION.
LASER BEAM”, etc. to see if there is any dirt on their surface and if they are properly stuck to the
equipment.
5. Disposal of the Equipment, Supplies, Packing Materials, Used Batteries and IC-RAMs
- Regarding the recovery and disposal of the equipment, supplies, packing materials, used
batteries and IC-RAMs including lithium batteries, follow the relevant local regulations or rules.
6. When the option has been installed:
When the EFI printer board has been installed, be sure to unplug the power cable before performing
maintenance and inspection, otherwise troubles such as a communication error may occur.
Caution:
Dispose of used batteries and IC-RAMs including lithium batteries according to this manual.
Attention:
Se débarrasser de batteries et IC-RAMs usés y compris les batteries en lithium selon ce manuel.
Vorsicht:
Entsorgung der gebrauchten Batterien und IC-RAMs (inclusive der Lithium-Batterie) nach diesem Handbuch.
Explanatory label
Warning for grounding wire
Warning for
high temperature area
(fuser unit)
Warning for
high temperature area
(fuser unit)
Warning for
high temperature area
(ventilation holes)
Identification label
Certification label
Warning for high temperature area
Warning for handling transfer belt

© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved CONTENTS
1
CONTENTS
1. FEATURE......................................................................................................................1-1
1.1 Main Feature of e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C...........................1-1
2. SPECIFICATIONS/ACCESSORIES/OPTIONS/SUPPLIES .........................................2-1
2.1 Specifications....................................................................................................................2-1
2.1.1 General..............................................................................................................2-1
2.1.2 Copy ..................................................................................................................2-3
2.1.3 Print ...................................................................................................................2-8
2.1.4 Scan...................................................................................................................2-8
2.1.5 e-Filing...............................................................................................................2-8
2.1.6 Internet Fax........................................................................................................2-9
2.1.7 Network Fax.......................................................................................................2-9
2.2 Accessories.....................................................................................................................2-10
2.3 Options............................................................................................................................2-12
2.4 Supplies ..........................................................................................................................2-13
2.5 System List......................................................................................................................2-14
3. OUTLINE OF THE MACHINE.......................................................................................3-1
3.1 Sectional View...................................................................................................................3-1
3.1.1 Front side-1........................................................................................................3-1
3.1.2 Front side-2........................................................................................................3-3
3.1.3 Rear side ...........................................................................................................3-5
3.2 Electric Parts Layout.........................................................................................................3-7
3.3 Symbols and Functions of Various Components............................................................3-18
3.4 System Block Diagram....................................................................................................3-26
3.5 Disassembly and Replacement of Covers......................................................................3-27
3.5.1 Front cover.......................................................................................................3-27
3.5.2 Inner tray..........................................................................................................3-27
3.5.3 Tray back cover ...............................................................................................3-27
3.5.4 Front upper cover ............................................................................................3-28
3.5.5 Front right cover...............................................................................................3-28
3.5.6 Left upper cover...............................................................................................3-29
3.5.7 Left cover.........................................................................................................3-29
3.5.8 Left lower cover ...............................................................................................3-29
3.5.9 Left rear cover..................................................................................................3-30
3.5.10 Right upper cover ............................................................................................3-30
3.5.11 Right rear cover ...............................................................................................3-30
3.5.12 Right rear hinge cover .....................................................................................3-31
3.5.13 Right lower cover.............................................................................................3-31
3.5.14 Right front hinge cover.....................................................................................3-31
3.5.15 Bypass rear cover............................................................................................3-32
3.5.16 Right inner cover..............................................................................................3-32
3.5.17 Upper rear cover..............................................................................................3-32
3.5.18 Rear cover-1....................................................................................................3-33
3.5.19 Rear cover-2....................................................................................................3-33
3.5.20 Rear cover-3....................................................................................................3-33
3.5.21 Waste toner cover............................................................................................3-34
4. COPY PROCESS..........................................................................................................4-1
4.1 General Description ..........................................................................................................4-1
4.1.1 Expression of Colors..........................................................................................4-1
4.1.2 4-Step Copy Process.........................................................................................4-2
4.2 Description of Operation ...................................................................................................4-3
4.3 Functions...........................................................................................................................4-4
4.4 Comparison with e-STUDIO2500C/3500C/3510C..........................................................4-13

© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
CONTENTS 2
5. GENERAL OPERATION...............................................................................................5-1
5.1 Overview of Operation ......................................................................................................5-1
5.2 Description of Operation ...................................................................................................5-2
5.2.1 Warming-up .......................................................................................................5-2
5.2.2 Ready (ready for copying) .................................................................................5-2
5.2.3 Drawer feed copying (1st drawer paper feeding)...............................................5-3
5.2.4 Bypass feed copying..........................................................................................5-9
5.2.5 Interruption copying ...........................................................................................5-9
5.3 Detection of Abnormality.................................................................................................5-10
5.3.1 Types of abnormality .......................................................................................5-10
5.3.2 Description of abnormality ...............................................................................5-11
5.4 Flow Chart.......................................................................................................................5-16
5.4.1 Power ON to ready ..........................................................................................5-16
5.4.2 Automatic feed copying ...................................................................................5-18
6. CONTROL PANEL........................................................................................................6-1
6.1 General Description ..........................................................................................................6-1
6.2 Items Shown on the Display Panel ...................................................................................6-2
6.2.1 Display...............................................................................................................6-2
6.2.2 Message ............................................................................................................6-3
6.3 Relation between the Equipment State and Operator’s Operation ...................................6-8
6.4 Description of Operation .................................................................................................6-10
6.4.1 Dot matrix LCD circuit......................................................................................6-10
6.4.2 LED display circuit ...........................................................................................6-13
6.5 Disassembly and Replacement.......................................................................................6-14
6.5.1 Stopper ............................................................................................................6-14
6.5.2 Control panel unit.............................................................................................6-14
6.5.3 Panel inverter board (P-INV) ...........................................................................6-16
6.5.4 DSP board.......................................................................................................6-16
6.5.5 KEY board .......................................................................................................6-18
6.5.6 LCD..................................................................................................................6-19
6.5.7 Control panel cover..........................................................................................6-19
7. SCANNER.....................................................................................................................7-1
7.1 General Description ..........................................................................................................7-1
7.2 Construction......................................................................................................................7-2
7.3 Functions...........................................................................................................................7-3
7.4 Description of Operation ...................................................................................................7-5
7.4.1 Scanning operation............................................................................................7-5
7.4.2 Initialization at power-ON...................................................................................7-6
7.5 Electric Circuit Description................................................................................................7-7
7.5.1 Scan motor control circuit ..................................................................................7-7
7.5.2 Exposure Lamp Control Circuit..........................................................................7-8
7.5.3 General Description of CCD Control................................................................7-11
7.5.4 Automatic Original Size Detection Circuit........................................................7-11
7.6 Disassembly and Replacement.......................................................................................7-16
7.6.1 Original glass...................................................................................................7-16
7.6.2 Lens cover.......................................................................................................7-16
7.6.3 Automatic original detection sensor (APS sensor) ..........................................7-17
7.6.4 Exposure lamp (EXP)......................................................................................7-17
7.6.5 Lens unit..........................................................................................................7-19
7.6.6 Scan motor (M1)..............................................................................................7-21
7.6.7 Carriage-1........................................................................................................7-22
7.6.8 Inverter board (INV).........................................................................................7-24
7.6.9 Carriage wire / carriage-2 ................................................................................7-25
7.6.10 Carriage home position sensor (S6)................................................................7-28
7.6.11 Platen sensor (S7)...........................................................................................7-28
7.6.12 SLG board (SLG).............................................................................................7-28
7.6.13 Scanner unit cooling fan (M30)........................................................................7-29

© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved CONTENTS
3
7.6.14 Exposure lamp cooling fan (M32)....................................................................7-29
7.7 Adjustment of the Scanner Section.................................................................................7-30
7.7.1 Adjustment carriages-1 and -2 positions .........................................................7-30
7.7.2 Belt tension adjustment of the Scan motor......................................................7-31
8. IMAGE PROCESSING..................................................................................................8-1
8.1 General Description ..........................................................................................................8-1
8.2 Configuration.....................................................................................................................8-2
8.3 Image Processing PC Board (IMG)...................................................................................8-3
8.3.1 Features.............................................................................................................8-3
8.3.2 Functions of image processing circuit................................................................8-3
8.4 System Control PC Board (SYS) ......................................................................................8-7
8.4.1 Features.............................................................................................................8-7
8.4.2 Functions of image processing circuit................................................................8-7
8.5 Image Related Adjustment................................................................................................8-8
8.5.1 Adjustment Order...............................................................................................8-8
8.5.2 Adjustment of the Auto-Toner Sensor .............................................................8-10
8.5.3 Performing Image Quality Control ...................................................................8-12
8.5.4 Adjustment of Color Registration Control ........................................................8-14
8.5.5 Adjustment of the transfer belt due to environmental factors ..........................8-15
8.5.6 Image Dimensional Adjustment.......................................................................8-16
8.5.7 Paper alignment at the registration roller.........................................................8-18
8.5.8 Image dimensional adjustment at the printing section.....................................8-23
8.5.9 Image dimensional adjustment at the scanning section ..................................8-28
8.6 Image Quality Adjustment (Copying Function)................................................................8-37
8.6.1 Automatic gamma adjustment .........................................................................8-37
8.6.2 Density adjustment ..........................................................................................8-39
8.6.3 Color balance adjustment................................................................................8-40
8.6.4 Gamma balance adjustment............................................................................8-42
8.6.5 Background adjustment...................................................................................8-43
8.6.6 Judgment threshold for ACS (common for copy and scan).............................8-44
8.6.7 Sharpness adjustment.....................................................................................8-44
8.6.8 Setting range correction...................................................................................8-45
8.6.9 Adjustment of smudged/faint text ....................................................................8-45
8.6.10 Color Adjustment of Marker.............................................................................8-46
8.6.11 Beam level conversion setting.........................................................................8-47
8.6.12 Maximum toner density adjustment to paper type...........................................8-48
8.6.13 Maximum text density adjustment ...................................................................8-48
8.6.14 Text/Photo reproduction level adjustment .......................................................8-49
8.6.15 Black reproduction switching at the Twin color copy mode .............................8-49
8.6.16 Black header density level adjustment ............................................................8-50
8.6.17 Black area adjustment in twin color copy mode...............................................8-50
8.6.18 Judgment threshold adjustment for blank originals .........................................8-50
8.6.19 Background offsetting adjustment for ADF......................................................8-51
8.7 Image Quality Adjustment (Printing Function).................................................................8-52
8.7.1 Automatic gamma adjustment .........................................................................8-52
8.7.2 Gamma balance adjustment (Black Mode)......................................................8-54
8.7.3 Color balance adjustment................................................................................8-56
8.7.4 Adjustment of faint text ....................................................................................8-57
8.7.5 Upper limit value at Toner Saving Mode..........................................................8-57
8.7.6 Maximum toner density adjustment.................................................................8-58
8.7.7 Fine line enhancement switchover ..................................................................8-58
8.7.8 “PureBlack/PureGray” threshold adjustment (PCL).........................................8-58
8.7.9 “PureBlack/PureGray” threshold adjustment (Twin color mode) .....................8-59
8.7.10 “PureBlack/PureGray” threshold adjustment (PS)...........................................8-59
8.7.11 “PureBlack/PureGray” threshold adjustment (XPS).........................................8-59
8.7.12 Toner limit threshold adjustment......................................................................8-60
8.7.13 Screen switchover ...........................................................................................8-60
8.7.14 Sharpness adjustment.....................................................................................8-61

© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
CONTENTS 4
8.7.15 Thin line width lower limit adjustment ..............................................................8-61
8.7.16 Offsetting adjustment for background processing ...........................................8-61
8.8 Image Quality Adjustment (Scanning Function)..............................................................8-62
8.8.1 Gamma balance adjustment............................................................................8-62
8.8.2 Density adjustment ..........................................................................................8-63
8.8.3 Background adjustment (Color Mode).............................................................8-64
8.8.4 Judgment threshold for ACS (common for copy and network scan) ...............8-64
8.8.5 Sharpness adjustment.....................................................................................8-65
8.8.6 Setting range correction...................................................................................8-66
8.8.7 Fine adjustment of black density .....................................................................8-67
8.8.8 RGB conversion method selection ..................................................................8-67
8.8.9 Adjustment of saturation..................................................................................8-68
8.8.10 Background processing offset adjustment.......................................................8-69
8.9 Image Quality Adjustment (FAX Function)......................................................................8-70
8.9.1 Density adjustment ..........................................................................................8-70
8.9.2 Beam level conversion setting.........................................................................8-71
9. LASER OPTICAL UNIT ................................................................................................9-1
9.1 General Description ..........................................................................................................9-1
9.2 Structure............................................................................................................................9-3
9.3 Electric Circuit Description................................................................................................9-7
9.3.1 Laser diode control circuit..................................................................................9-7
9.3.2 Polygonal motor control circuit...........................................................................9-8
9.3.3 Mirror motor control circuit.................................................................................9-9
9.4 Disassembly and Replacement.......................................................................................9-11
9.4.1 Laser optical unit..............................................................................................9-11
9.4.2 Shutter unit ......................................................................................................9-14
9.4.3 Shutter motor (M12).........................................................................................9-15
9.4.4 Shutter status detection sensor (S20) .............................................................9-16
9.4.5 Slit glass cleaning pad.....................................................................................9-17
9.4.6 Polygonal motor...............................................................................................9-17
9.5 Image Adjustment in Laser Optical Unit..........................................................................9-19
10. DRIVE SYSTEM..........................................................................................................10-1
10.1 General Description ........................................................................................................10-1
11. PAPER FEEDING SYSTEM........................................................................................11-1
11.1 General Descriptions.......................................................................................................11-1
11.2 Composition....................................................................................................................11-2
11.3 Functions.........................................................................................................................11-3
11.4 Description of Operation .................................................................................................11-5
11.4.1 Drive of rollers..................................................................................................11-5
11.4.2 Operation of bypass pickup roller....................................................................11-6
11.4.3 Operation of drawer pickup roller.....................................................................11-7
11.4.4 Separation of paper.........................................................................................11-8
11.4.5 General operation............................................................................................11-8
11.5 Electric Circuit Description ............................................................................................11-11
11.5.1 Tray-up motor control circuit..........................................................................11-11
11.5.2 Registration motor control circuit ...................................................................11-12
11.5.3 Feed/Transport motor control circuit..............................................................11-13
11.6 Disassembly and Replacement.....................................................................................11-14
11.6.1 Bypass unit....................................................................................................11-14
11.6.2 Hinge assembly .............................................................................................11-15
11.6.3 SFB board (SFB) ...........................................................................................11-16
11.6.4 Bypass feed upper cover...............................................................................11-17
11.6.5 Bypass upper guide.......................................................................................11-18
11.6.6 Bypass pickup solenoid (SOL1).....................................................................11-18
11.6.7 Bypass paper sensor (S40)...........................................................................11-19
11.6.8 Bypass pickup roller.......................................................................................11-20
11.6.9 Bypass feed roller..........................................................................................11-20