Toshiba E-Studio 2330C-4520C & Handbook Workshop Service Repair Manual PDF Download

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