Toshiba e-STUDIO 182, E-studio 212, E-studio 242 Service manual

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SERVICE MANUAL

MULTIFUNCTIONAL DIGITAL SYSTEMS

e-STUDIO182/212/242

Model: DP1830/DP2120/DP2420 Publish Date: December 2009 File No. SME09001500 R091021I2800-TTEC Ver00_2009-12

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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.

• Mylar is a registered trademark of DuPont Teijin Films U.S. Limited Partnership.

• Molykote is a registered trademark of Dow Corning Corporation.

• FLOIL is a registrated treadmark of Kanto Kasei Ltd. CORPORATION.

• TopAccess is a trademark of Toshiba Tec Corporation.

• iCLASS is a trademark of HID Corporation.

• MIFARE is a trademark of Royal Philips Electronics.

• Other company names and product names in this manual are the trademarks of their respective companies.

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.

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GENERAL PRECAUTIONS REGARDING THE SERVICE FOR e-STUDIO182/212/242

The installation and service should be done by a qualified service technician.

1) Transportation/Installation

- When transporting/installing the equipment, remove the drawer, employ two persons and be sure

to hold the positions as shown in the figure. The equipment is quite heavy and weighs approximately 33 kg (72.75 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 trans-

porting 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 or 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 easily accessible.

- Be sure to fix and plug in the power cable securely after the installation so that no one trips over

it.

- When the equipment is used after the option is removed, be sure to install the parts or the covers

which have been taken off so that the inside of the equipment is not exposed.

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 in the wrong places.

- Basically, the equipment should not be operated with any parts removed or disassembled.

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- 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.

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.

- 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, developer, high-voltage trans-

former 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.

3) Important Service Parts for Safety

- The breaker, door switch, fuse, thermostat, thermofuse, thermistor, batteries, 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 and/or do not use the parts not recommended by Toshiba TEC Corporation.

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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.

Certification label (For UC)

Explanatory label

Identification label

For UC

For EU

For others

Warning for high-temperature areas (ventilation holes

Warning for high-temperature areas (fuser unit

)

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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 batter-

ies and IC-RAMs including lithium batteries, follow the relevant local regulations or rules.

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.

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ALLEGEMEINE SICHERHEITSMASSNAHMEN IN BEZUG AUF DIE WARTUNG FÜR e-STUDIO182/212/242

Die Installation und die Wartung sind von einem qualifizierten ServiceTechniker durchzuführen.

1) Transport/Installation

- Zum Transportieren/Installieren des Gerätes werden 2 Personen benötigt. Die Kassette zuerst

herausnehmen und nur an den in der Abbildung gezeigten Stellen tragen. Das Gerät ist sehr schwer und wiegt etwa 33 kg; deshalb muss bei der Handhabung des Geräts besonders aufgepasst werden.

- Beim Transportieren des Geräts nicht an den beweglichen Teilen oder Einheiten halten.

- Eine spezielle Steckdose mit Stromversorgung von AC 110 V / 13.2 A, 115 V oder 127 V / 12 A,

220-240 V / 8 A als Stromquelle verwenden.

- Das Gerät ist aus Sicherheitsgründen zu erden.

- Einen geeigneten Standort für die Installation wählen. Standorte mit zuviel Hitze, hoher Luft-

feuchtigkeit, Staub, Vibrieren und direkter Sonneneinstrahlung sind zu vermeiden.

- Für ausreichende Belüftung sorgen, da das Gerät etwas Ozon abgibt.

- Um einen optimalen Kopierbetrieb zu gewährleisten, muss ein Abstand von mindestens 80 cm

links, 80 cm rechts und 10 cm dahinter eingehalten werden.

- Das Gerät ist in der Nähe der Steckdose zu installieren; diese muss leicht zu erreichen sein.

- Nach der Installation muss das Netzkabel richtig hineingesteckt und befestigt werden, damit nie-

mand darüber stolpern kann.

2) Allgemeine Sicherheitsmassnahmen in bezug auf die Wartung

- Während der Wartung das Gerät ausschalten und das Netzkabel herausziehen (ausser Wartung,

die bei einem eingeschalteten Gerät, durchgeführt werden muss).

- Das Netzkabel herausziehen und den Bereich um die Steckerpole und die Steckdose die Umge-

bung in der Nähe von den Steckerzacken und der Steckdose wenigstens einmal im Jahr reinigen. Wenn Staub sich in dieser Gegend ansammelt, kann dies ein Feuer verursachen.

- Wenn die Teile auseinandergenommen werden, wenn nicht anders in diesem Handbuch usw

erklärt, ist das Zusammenbauen in umgekehrter Reihenfolge durchzuführen. Aufpassen, dass kleine Teile wie Schrauben, Dichtungsringe, Bolzen, E-Ringe, Stern-Dichtungsringe, Kabelbäume nicht an den verkehrten Stellen eingebaut werden.

- Grundsätzlich darf das Gerät mit enfernten oder auseinandergenommenen Teilen nicht in

Betrieb genommen werden.

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- Das PC-Board muss in einer Anti-elektrostatischen Hülle gelagert werden. Nur Mit einer Man-

schette bei Betätigung eines Armbandes anfassen, sonst könnte es sein, dass die integrierten Schaltkreise durch statische Elektrizität beschädigt werden.

Vorsicht: Vor Benutzung der Manschette der Betätigung des Armbandes, das Netzkabel

des Gerätes herausziehen und prüfen, dass es in der Nähe keine geladenen Gegenstände, die nicht isoliert sind, gibt.

- Setzen Sie sich während der Wartungsarbeiten nicht dem Laserstrahl aus. Dieses Gerät ist mit

einer Laserdiode ausgestattet. Es ist unbedingt zu vermeiden, direkt in den Laserstrahl zu blicken. Keine reflektierenden Teile oder Werkzeuge, wie z. B. Schraubendreher, in den Pfad des Laserstrahls halten. Vor den Wartungsarbeiten sämtliche reflektierenden Metallgegenstände, wie Uhren, Ringe usw., entfernen.

- Auf keinen Fall Hochtemperaturbereiche, wie die Belichtungslampe, die Fixiereinheit, die

Heizquelle und die umliegenden Bereiche, berühren.

- Auf keinen Fall Hochspannungsbereiche, wie die Ladeeinheiten, die Entwicklereinheit, den

Hochspannungstransformator, und das Netzgerät, berühren. Insbesondere sollten die Platinen dieser Komponenten nicht berührt werden, da die Kondensatoren usw. auch nach dem Ausschalten des Geräts noch elektrisch geladen sein können.

- Vor dem Berühren potenziell gefährlicher Bereiche (z. B. drehbare oder betriebsrelevante Bere-

iche, wie Zahnräder, Riemen, Riemenscheiben, Lüfter und die Laseraustrittsöffnung der optischen Lasereinheit) sicherstellen, dass das Gerät sich nicht bedienen lässt.

- Beim Entfernen von Abdeckungen vorsichtig vorgehen, da sich darunter scharfkantige Kompo-

nenten befinden können.

- Bei Wartungsarbeiten am eingeschalteten Gerät dürfen keine unter Strom stehenden, drehbaren

oder betriebsrelevanten Bereiche berührt werden. Nicht direkt in den Laserstrahl blicken.

- Ausschließlich vorgesehene Werkzeuge und Hilfsmittel verwenden.

- Empfohlene oder gleichwertige Messgeräte verwenden.

- Nach Abschluss der Wartungsarbeiten das Gerät in den ursprünglichen Zustand zurück

versetzen und den einwandfreien Betrieb überprüfen.

3) Sicherheitsrelevante Wartungsteile

- Der Leistungsschutzschalter, der Türschalter, die Sicherung, der Thermostat, die Ther-

mosicherung, der Thermistor, die IC-RAMs einschließlich der Lithiumakkus usw. sind besonders sicherheitsrelevant. Sie müssen unbedingt korrekt gehandhabt und installiert werden. Wenn diese Teile kurzgeschlossen und funktionsunfähig werden, kann dies zu schwerwiegenden Schäden, wie einem Abbrand, führen. Kurzschlüsse sind zu vermeiden, und es sind ausschließlich Teile zu verwenden, die von der Toshiba TEC Corporation empfohlen sind.

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4) Warnetiketten

- Im Rahmen der Wartung unbedingt das Leistungsschild und die Etiketten mit Warnhinweisen

überprüfen [z. B. „Unplug the power cable during service“ („Netzkabel vor Beginn der Wartungsarbeiten abziehen“), „CAUTION. HOT“ („VORSICHT, HEISS“), „CAUTION. HIGH VOLTAGE“ („VORSICHT, HOCHSPANNUNG“), „CAUTION. LASER BEAM“ („VORSICHT, LASER“) usw.], um sicherzustellen, dass sie nicht verschmutzt sind und korrekt am Gerät angebracht sind.

Certification label (For UC)

Explanatory label

Identification label

For UC

For EU

For others

Warning for high-temperature areas (ventilation holes

Warning for high-temperature areas (fuser unit

)

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5) Entsorgung des Geräts, der Verbrauchs- und Verpackungsmaterialien, alter Akkus und IC-RAMs

- In Bezug auf die Entsorgung und Wiederverwertung des Geräts, der Verbrauchs- und Verpack-

ungsmaterialien, alter Akkus und IC-RAMs, einschließlich Lithiumakkus, sind die einschlägigen nationalen oder regionalen Vorschriften zu befolgen.

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.

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• Laseremissionseinheit

Diese Einheit besteht aus der Laserdiode, dem Fokussierungsobjektiv, der Blende und dem Zylinderobjektiv.

- Laserdiode Diese Laserdiode zeichnet sich durch eine geringe Regeldifferenz, eine kleine Laservariation und einen niedrigen Schwellenstrom aus. Die Blende der Laseremissionseinheit ist unter dem Fokussierobjektiv angeordnet, um die Form der Laserstrahlen in der primären und sekundären Scanrichtung festzulegen. Die Laserdiode gibt Laserstrahlen als Reaktion auf die Signale der Laseremissionssteuerung (ein/ aus) von der Lasertreiber-PC-Platine (LDR) aus. Die durch das Fokussierobjektiv geführten Laserstrahlen werden auf die Trommeloberfläche fokussiert.

- Vorsichtsmaßnahmen im Zusammenhang mit Lasern Dieses Gerät enthält eine Laserdiode, die einen unsichtbaren Laserstrahl emittiert. Da man diesen Laserstrahl nicht sehen kann, ist bei der Handhabung der Komponenten der optischen Lasereinheit, bei der Durchführung von Arbeiten und bei der Justierung des Laserstrahls äußerste Vorsicht geboten. Arbeiten dürfen niemals anhand anderer als den vorgeschriebenen Anleitungen durchgeführt werden; andernfalls kann es zu einer Schädigung Exposition durch Laserstrahlung kommen. Die Lasereinheit ist vollständig mit einer Schutzabdeckung versiegelt. Solange ausschließlich die Arbeitsschritte der vorgeschriebenen Anleitungen durchgeführt werden, tritt der Laserstrahl nicht aus, und es besteht keine Gefahr, der Laserstrahlung ausgesetzt zu werden.

Das folgende Laser-Warnetikett ist an der Abdeckung vorne rechts angebracht.

• Warnhinweise:

- Setzen Sie sich während der Wartungsarbeiten nicht dem Laserstrahl aus.

Dieses Gerät ist mit einer Laserdiode ausgestattet. Es ist unbedingt zu vermeiden, direkt in den Laserstrahl zu blicken. Keine reflektierenden Teile oder Werkzeuge, wie z. B. Schraubendreher, in den Pfad des Laserstrahls halten. Vor den Wartungsarbeiten sämtliche reflektierenden Metallgegenstände, wie Uhren, Ringe usw., entfernen.

- Bei Wartungsarbeiten am eingeschalteten Gerät dürfen keine unter Strom stehenden, drehbaren

oder betriebsrelevanten Bereiche berührt werden. Nicht direkt in den Laserstrahl blicken.

- Im Rahmen der Wartung unbedingt das Leistungsschild und die Etiketten mit Warnhinweisen

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1. SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES ................................... 1-1

1.1 Specifications .................................................................................................................... 1-1

1.2 Accessories....................................................................................................................... 1-5

1.3 Options.............................................................................................................................. 1-6

1.4 Supplies ............................................................................................................................ 1-7

1.5 System List........................................................................................................................ 1-8

2. OUTLINE OF THE MACHINE ....................................................................................... 2-1

2.1 Sectional View................................................................................................................... 2-1

2.2 Electric Parts Layout ......................................................................................................... 2-4

2.3 Symbols and Functions of Various Components ............................................................ 2-11

2.4 General Description ........................................................................................................ 2-15

2.4.1 System block diagram ..................................................................................... 2-15

2.4.2 Construction of boards..................................................................................... 2-16

2.5 Disassembly and Replacement of Covers ...................................................................... 2-18

2.5.1 Front cover....................................................................................................... 2-18

2.5.2 Inner tray.......................................................................................................... 2-18

2.5.3 Left cover ......................................................................................................... 2-18

2.5.4 Tray rear cover ................................................................................................ 2-19

2.5.5 Front right cover............................................................................................... 2-19

2.5.6 Front upper cover ............................................................................................ 2-19

2.5.7 ADU cover ....................................................................................................... 2-20

2.5.8 Right front cover .............................................................................................. 2-20

2.5.9 Right rear cover ............................................................................................... 2-21

2.5.10 Rear cover ....................................................................................................... 2-21

2.6 Disassembly and Replacement of PC boards................................................................. 2-22

2.6.1 MAIN board (MAIN) ......................................................................................... 2-22

2.6.2 SRAM board (SRAM) ...................................................................................... 2-23

2.6.3 Fuse PC board (FUS) ...................................................................................... 2-23

2.6.4 Paper feed controller PC board (PFC)............................................................. 2-24

2.6.5 Switching regulator unit (PS) ........................................................................... 2-25

2.6.6 Switching regulator cooling fan (M6) ............................................................... 2-27

2.7 Removal and Installation of Options ............................................................................... 2-28

2.7.1 MR-2020 (Automatic Document Feeder (ADF))/

MR-3023 (Reversing Automatic Document Feeder (RADF)) .......................... 2-28

2.7.2 MY-1027 (Paper Feed Unit (PFU)) .................................................................. 2-30

2.7.3 KD-1022 (Paper Feed Pedestal (PFP)) ........................................................... 2-35

3. COPY PROCESS ..........................................................................................................3-1

3.1 General Description of Copying Process .......................................................................... 3-1

3.2 Details of Copying Process ............................................................................................... 3-2

3.3 Comparison with e-STUDIO230/280............................................................................... 3-13

4. GENERAL OPERATION............................................................................................... 4-1

4.1 Overview of Operation ...................................................................................................... 4-1

4.2 Description of Operation ................................................................................................... 4-2

4.2.1 Warming-up ....................................................................................................... 4-2

4.2.2 Ready state (ready for copying)......................................................................... 4-2

4.2.3 Drawer feed copying .......................................................................................... 4-3

4.2.4 Bypass feed copying.......................................................................................... 4-4

4.2.5 Interruption copying ........................................................................................... 4-4

4.3 Detection of Abnormality ................................................................................................... 4-5

4.3.1 Types of abnormality ......................................................................................... 4-5

4.3.2 Description of abnormality ................................................................................. 4-6

5. CONTROL PANEL........................................................................................................ 5-1

5.1 General Description .........................................................................................................5-1

CONTENTS

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5.2 Items Shown on the Display Panel ................................................................................... 5-2

5.2.1 Display ............................................................................................................... 5-2

5.2.2 Message ............................................................................................................ 5-3

5.3 Relation between Equipment State and Operation ........................................................... 5-4

5.4 Operation .......................................................................................................................... 5-5

5.4.1 Block diagram .................................................................................................... 5-5

5.4.2 LED display circuit ............................................................................................. 5-6

5.5 Disassembly and Replacement......................................................................................... 5-7

5.5.1 Control panel unit............................................................................................... 5-7

5.5.2 Control panel PC board (HPNL) ........................................................................ 5-7

5.5.3 LCD PC board (LCD) ......................................................................................... 5-8

6. SCANNER ..................................................................................................................... 6-1

6.1 General Description ..........................................................................................................6-1

6.2 Construction ...................................................................................................................... 6-2

6.3 Functions........................................................................................................................... 6-3

6.4 Description of Operation ................................................................................................... 6-5

6.4.1 Scanning operation............................................................................................ 6-5

6.4.2 Scan motor drive circuit ..................................................................................... 6-6

6.5 Contact Image Sensor Unit Control Circuit ....................................................................... 6-8

6.5.1 Exposure LED control circuit ............................................................................. 6-8

6.5.2 CCD control circuit............................................................................................. 6-9

6.6 Automatic Original Size Detection Circuit ....................................................................... 6-11

6.6.1 Principle of original size detection ................................................................... 6-11

6.6.2 Process of detection of original size ................................................................ 6-12

6.7 Disassembly and Replacement....................................................................................... 6-16

6.7.1 Original glass ................................................................................................... 6-16

6.7.2 Scanner top cover............................................................................................ 6-17

6.7.3 Automatic original detection sensor (APS sensor) .......................................... 6-18

6.7.4 Scan motor (M1) .............................................................................................. 6-18

6.7.5 CIS home position sensor (S1)........................................................................ 6-20

6.7.6 Platen sensor (S2) ........................................................................................... 6-20

6.7.7 CIS unit (CIS)................................................................................................... 6-21

6.7.8 CIS case .......................................................................................................... 6-23

6.7.9 CIS unit drive belt-1 ........................................................................................ 6-24

6.7.10 CIS unit drive belt-2 ......................................................................................... 6-25

7. LASER OPTICAL UNIT ................................................................................................ 7-1

7.1 General Description ..........................................................................................................7-1

7.2 Structure............................................................................................................................ 7-2

7.3 Laser Diode Control Circuit ............................................................................................... 7-5

7.4 Polygonal Motor Control Circuit ........................................................................................ 7-6

7.5 Disassembly and Replacement......................................................................................... 7-7

7.5.1 Laser optical unit................................................................................................ 7-7

8. DRIVE UNIT .................................................................................................................. 8-1

8.1 General Description ..........................................................................................................8-1

8.2 Configuration..................................................................................................................... 8-2

8.3 Functions .......................................................................................................................... 8-3

8.4 Main Motor Control Circuit ................................................................................................ 8-4

8.5 Disassembly and Replacement......................................................................................... 8-6

8.5.1 Main motor (M3) ................................................................................................ 8-6

8.5.2 Toner motor (M2)............................................................................................... 8-6

8.5.3 Main motor drive unit ......................................................................................... 8-7

9. PAPER FEEDING SYSTEM.......................................................................................... 9-1

9.1 General Description ..........................................................................................................9-1

9.2 Configuration..................................................................................................................... 9-2

9.3 Functions........................................................................................................................... 9-3

9.4 Operation .......................................................................................................................... 9-5

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9.4.1 Drawer ............................................................................................................... 9-5

9.4.2 Bypass tray ........................................................................................................ 9-7

9.4.3 General operation .............................................................................................. 9-9

9.5 Disassembly and Replacement....................................................................................... 9-10

9.5.1 Bypass unit ...................................................................................................... 9-10

9.5.2 Bypass tray ...................................................................................................... 9-11

9.5.3 Bypass separation pad ................................................................................... 9-11

9.5.4 Bypass roller unit ............................................................................................. 9-12

9.5.5 Bypass pickup roller ........................................................................................ 9-14

9.5.6 Bypass feed roller ........................................................................................... 9-14

9.5.7 Bypass paper sensor (S8) ............................................................................... 9-14

9.5.8 Bypass pickup solenoid (SOL2)....................................................................... 9-15

9.5.9 Bypass pickup clutch / Bypass feed clutch ...................................................... 9-16

9.5.10 Damp heater unit (DH3) / Dummy plate .......................................................... 9-18

9.5.11 Paper empty sensor (S7)................................................................................. 9-18

9.5.12 Pickup roller .................................................................................................... 9-19

9.5.13 Registration clutch (CLT1) ............................................................................... 9-20

9.5.14 Pickup solenoid (SOL1) ................................................................................... 9-20

9.5.15 Drawer pickup clutch ....................................................................................... 9-21

9.5.16 Registration roller (rubber)............................................................................... 9-22

9.5.17 Registration roller (metal) ................................................................................ 9-23

9.5.18 Feed gear unit.................................................................................................. 9-24

9.5.19 Drawer detection switch (SW5) ....................................................................... 9-24

9.5.20 Registration sensor (S4) .................................................................................. 9-25

10. DRUM RELATED SECTION....................................................................................... 10-1

10.1 General Description ........................................................................................................ 10-1

10.2 Configuration................................................................................................................... 10-2

10.3 Functions......................................................................................................................... 10-3

10.4 High-Voltage Output Control Circuit................................................................................ 10-5

10.4.1 General description.......................................................................................... 10-5

10.4.2 Description of Operation .................................................................................. 10-6

10.5 Drum Temperature Detection Circuit .............................................................................. 10-7

10.5.1 General description.......................................................................................... 10-7

10.5.2 Circuit configuration ......................................................................................... 10-7

10.6 Temperature/Humidity Detection Circuit ......................................................................... 10-8

10.6.1 General Description ......................................................................................... 10-8

10.6.2 Circuit configuration ......................................................................................... 10-8

10.7 Disassembly and Replacement....................................................................................... 10-9

10.7.1 Process unit ..................................................................................................... 10-9

10.7.2 Drum cleaner unit .......................................................................................... 10-11

10.7.3 Discharge LED (ERS).................................................................................... 10-12

10.7.4 Main charger.................................................................................................. 10-13

10.7.5 Main charger grid .......................................................................................... 10-13

10.7.6 Main charger cleaner ..................................................................................... 10-14

10.7.7 Needle electrode ........................................................................................... 10-14

10.7.8 Drum ............................................................................................................. 10-15

10.7.9 Drum cleaning blade ..................................................................................... 10-15

10.7.10 Drum separation finger ................................................................................. 10-15

10.7.11 Recovery blade ............................................................................................. 10-16

10.7.12 Transfer/Separation charger .......................................................................... 10-16

10.7.13 Charger wire ................................................................................................. 10-17

10.7.14 Transfer unit................................................................................................... 10-18

10.7.15 Ozone filter ................................................................................................... 10-19

10.7.16 Exhaust fan (M5) ........................................................................................... 10-20

10.7.17 Temperature/humidity sensor (S3) ................................................................ 10-21

10.7.18 Toner cartridge interface PC board (CTIF) .................................................... 10-22

CONTENTS

Page 16

11. DEVELOPMENT SYSTEM..........................................................................................11-1

11.1 General Description ........................................................................................................ 11-1

11.2 Construction.................................................................................................................... 11-2

11.3 Functions......................................................................................................................... 11-3

11.3.1 Function of each unit ....................................................................................... 11-3

11.3.2 Functions of the toner cartridge PC board (CTRG) ......................................... 11-4

11.3.3 Recovered toner supply mechanism ............................................................... 11-6

11.4 Toner Motor Control Circuit............................................................................................. 11-7

11.5 Auto-Toner Circuit........................................................................................................... 11-8

11.5.1 General description.......................................................................................... 11-8

11.5.2 Function of auto-toner sensor.......................................................................... 11-9

11.6 Disassembly and Replacement..................................................................................... 11-11

11.6.1 Developer unit................................................................................................ 11-11

11.6.2 Developer material ........................................................................................ 11-12

11.6.3 Filling developer unit with developer material................................................ 11-13

11.6.4 Auto-toner sensor (S6) .................................................................................. 11-14

11.6.5 Drum thermistor (THMS4) ............................................................................. 11-14

11.6.6 Guide roller / Developer sleeve ..................................................................... 11-14

11.6.7 Mixer .............................................................................................................. 11-18

11.6.8 Replacement of Oil Seal ................................................................................ 11-20

12. FUSER / EXIT UNIT ....................................................................................................12-1

12.1 General Description ........................................................................................................ 12-1

12.2 Configurations................................................................................................................. 12-2

12.3 Functions......................................................................................................................... 12-3

12.4 Operation ........................................................................................................................ 12-5

12.5 Fuser Unit Control Circuit................................................................................................ 12-6

12.5.1 Configuration ................................................................................................... 12-6

12.5.2 Temperature detection section ........................................................................ 12-7

12.6 Disassembly and Replacement..................................................................................... 12-12

12.6.1 Fuser / Exit unit.............................................................................................. 12-14

12.6.2 Pressure roller unit / Fuser roller unit............................................................. 12-14

12.6.3 Exit roller........................................................................................................ 12-15

12.6.4 Exit sensor (S5) ............................................................................................ 12-16

12.6.5 Separation finger ......................................................................................... 12-18

12.6.6 Center heater lamp / Side heater lamp (LAMP1/LAMP2) .............................. 12-19

12.6.7 Fuser roller .................................................................................................... 12-20

12.6.8 Pressure roller .............................................................................................. 12-20

12.6.9 Center thermistor / Side thermistor / Edge thermistor

(THMS1/THMS2/THMS3)............................................................................. 12-22

12.6.10 Fuser thermostat (THMO1)............................................................................ 12-22

12.6.11 Exit motor (M7): Option.................................................................................. 12-23

13. AUTOMATIC DUPLEXING UNIT (ADU) (OPTION: MD-0103) .................................. 13-1

13.1 General Description ........................................................................................................ 13-1

13.1.1 Specifications of MD-0103............................................................................... 13-2

13.2 Construction.................................................................................................................... 13-3

13.3 Functions......................................................................................................................... 13-4

13.4 Drive of ADU ................................................................................................................... 13-5

13.5 Description of Operation ................................................................................................ 13-6

13.6 Disassembly and Replacement..................................................................................... 13-11

13.6.1 Automatic Duplexing Unit (ADU) ................................................................... 13-11

13.6.2 ADU driving PC board (ADU) ........................................................................ 13-12

13.6.3 ADU motor (M8)............................................................................................. 13-12

13.6.4 Upper transport roller..................................................................................... 13-13

13.6.5 Lower transport roller..................................................................................... 13-13

13.6.6 Paper guide ................................................................................................... 13-14

Page 17

14. POWER SUPPLY UNIT .............................................................................................. 14-1

14.1 Construction.................................................................................................................... 14-1

14.2 Operation of DC Output Circuit ....................................................................................... 14-2

14.3 Output Channel............................................................................................................... 14-3

14.4 Fuse ................................................................................................................................ 14-4

14.5 Configuration of Power Supply Unit ................................................................................ 14-5

14.6 AC Wire Harness ............................................................................................................ 14-6

15. EXTERNAL COUNTERS ............................................................................................15-1

15.1 Outline............................................................................................................................. 15-1

15.2 Signal .............................................................................................................................. 15-1

15.2.1 Pin Layout........................................................................................................ 15-1

15.2.2 Details of the signals........................................................................................ 15-2

15.3 Notices ............................................................................................................................ 15-3

15.3.1 Setting code..................................................................................................... 15-3

15.3.2 Setting value change and restrictions when using the totalizer

(DocuLyzerNW) .............................................................................................. 15-3

15.3.3 Setting value change and restrictions when using the coin controller ............. 15-3

15.3.4 Simultaneous Installation of External Counters ............................................... 15-3

16. PC BOARDS ............................................................................................................... 16-1

CONTENTS

Page 18

Page 19

1. SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES

1.1 Specifications

When the value is different among e-STUDIO182, 212 and 242, the value for e-STUDIO212 is shown by [ ] and the value for e-STUDIO242 is shown by { }.

 Copy process Indirect electrophotographic process (dry)  Type Desktop type  Original table Fixed type (the left rear corner used as guide to place originals)  Accepted originals Sheet, book and 3-dimensional object. The automatic document feeder

(ADF) and reversing automatic document feeder (RADF), only accepts paper

which are not pasted or stapled. (Single-sided originals: 50 to 127 g/m 34 lb. Bond) Carbon paper are not acceptable either. Maximum size: A3/LD

 Copy speed (Copies/min.) e-STUDIO182

Bypass feed

Paper size Drawer

A4, B5, LT 18 16 11 16 16 16

A5-R, ST-R - 16 11 - 16 16

A4-R, B5-R, LT-R 15.5 15.5 11 15.5 15.5 15.5

B4, LG, FOLIO, COMPUTER

A3 , L D 11 11 11 11 11 11

13 13 11 13 13 13

Size

specified

Size not

specified

PFU

Upper

drawer

PFP

Lower

drawer

/13 to

e-STUDIO212

Bypass feed

Paper size Drawer

A4, B5, LT 21 20 20 20 20 20

A5-R, ST-R - - 20 - 20 20

A4-R, B5-R, LT-R 15.5 15.5 15.5 15.5 15.5 15.5

B4, LG, FOLIO, COMPUTER

A3 , L D 11 11 11 11 11 11

13 13 13 13 13 13

Size

specified

Size not

specified

PFU

Upper

drawer

PFP

Lower

drawer

e-STUDIO242

Bypass feed

Paper size Drawer

A4, B5, LT 24 23 23 23 23 23

A5-R, ST-R - - 23 - 23 23

A4-R, B5-R, LT-R 17.5 17.5 17.5 17.5 17.5 17.5

B4, LG, FOLIO, COMPUTER

A3, LD 12.5 12.5 12.5 12.5 12.5 12.5

15 15 15 15 15 15

Size

specified

Size not

specified

PFU

Upper

drawer

PFP

Lower

drawer

* “–” means “Not acceptable”. * The copy speed in the above table are available when originals are manually placed for single side,

multiple copying.

1 - 1

SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES

Page 20

* When the ADF and RADF are used, the copy speed of 16[20] {23} sheets per minute is only

available under the following conditions:

• Original/Mode: Single side original/A4/LT size. APS/automatic density are not selected.

• Number of sheets: 16[20] {23}

• Reproduction ratio: 100%

Copy speed for thick paper (Copies/min.) e-STUDIO182/212/242

Thick 1 (81 g/m

to 105 g/m2, 21.3 lb. Bond to 28 lb. Bond): Bypass feed on a sheet by sheet baisis

only

Thick 2 (106 g/m

to 163 g/m2, 28 lb. Bond to 90 lb. Index): Bypass feed on a sheet by sheet baisis only

 Copy paper

Drawer PFU PFP ADU Bypass copy Remarks

Size A3, A4, A4-R, B4, B5, B5-R,

Weight

Special

paper

A5-R(Only for PFP), LD, LG, LT, LT-R, ST-R(Only for PFP), FOLIO, COMPUTER, 13"LG, 8K, 16K, 16K-R

64 to 80 g/m

– Tracing paper, labels, OHP film

, 17 lb. Bond to 21.3 lb. Bond 50 to 163 g/m

 First copy time ..................... e-STUDIO182/212

Approx. 7.6 sec. (A4, 100%, original placed manually) Approx. 7.7 sec. (LT, 100%, original placed manually) e-STUDIO242 Approx. 7.5 sec. (A4/LT, 100%, original placed manually)

A3 to A5-R, LD to ST-R, FOLIO, COMPUTER, 13"LG,

8.5" x 8.5", 8K, 16K, 16K-R (Non-standard or userspecified sizes can be set.)

(Single paper feeding) 64 to 80 g/m

(Continuous feeding)

(thickness: 80 µm or thicker),

These special papers recommended by Tos h i b a Te c

 Warming-up time.................. Approx. 25 sec. (temperature: 20°C)

 Multiple copying ................... Up to 999 copies; Key in set numbers

 Reproduction ratio ............... Actual ratio: 100±0.5%

Zooming: 25 to 200% in increments of 1%

 Resolution/Gradation ........... Scanning: 600 dpi x 600 dpi

Printing: Equivalent to 2400 dpi x 600 dpi Gradation: 256 steps

 Eliminated portion ................ Leading edges: 3.0±2.0 mm, Side/trailing edges: 2.0±2.0 mm (copy)

Leading / trailing edges: 5.0±2.0 mm, Side edges: 5.0±2.0 mm (print)

1 - 2

Page 21

 Paper feeding ......................... Standard drawer:

1 drawer (stack height 28 mm, equivalent to 250 sheets; 64 to 80 g/m (17 to 22 lb. Bond))

Bypass feeding:

Stack height 11.8 mm: equivalent to 100 sheets; 64 to 80 g/m 22 lb. Bond)

Paper Feed Unit (PFU): Option (One drawer: stack height 28 mm, equivalent to 250 sheets; 64

to 80 g/m

(17 to 22 lb. Bond))

Paper Feed Pedestal (PFP): Option (One drawer or two: stack height 60.5 mm, equivalent to 550

sheets; 64 to 80 g/m

(17 to 22 lb. Bond))

 Capacity of originals in the ADF/RADF (Option)

.................................................. A3 to A5-R, LD to ST-R:

100 sheets / 80 g/m

(Stack height 16 mm or less)

 Automatic duplexing unit (ADU: Option)

.................................................. Stackless, Switchback type

 Toner supply ........................... Automatic toner density detection/supply

Toner cartridge replacing method (There is a recovered toner supply mechanism.)

(17 to

 Density control ..................... Automatic density mode and manual density mode selectable in 7

steps

 Weight.................................. Approx. 32.0 kg ( 70.55 lb.) (for NAD and MJD)

Approx. 33.2 kg ( 73.19 lb.) (for CND) Approx. 33.0 kg ( 72.75 lb.) (for others)

 Power requirements...AC 110 V / 13.2 A, 115 V or 127 V / 12 A

220-240 V or 240 V / 8 A (50/60 Hz)

* The acceptable value of each voltage is ±10%.

 Power consumption ... 1.5 kW or less (100 V series)

1.6 kW or less (200 V series)

* The electric power is supplied to the ADF/RADF, PFU, PFP and ADU through the equipment.

 Total counter ..............Electronical counter

1 - 3

SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES

Page 22

 Dimensions of the equipment .................. W 600 x D 658.6 x H 462.5 (mm): See the figure below

Fig. 1-1

1 - 4

Page 23

1.2 Accessories

Unpacking/setup instruction 1 set

Operator’s manual 1 pc.

Operator’s manual pocket 1 pc. (for NAD)

Power cable 1 pc.

CD-ROM 2 pcs.

Rubber cap 6 pcs. (for MJD, ASD, ASU and SAD)

2 pcs. (for NAD, CND, AUD, TWD, KRD and ARD)

Transfer charger wire cleaner (installed inside of the transfer cover)

Drum (installed inside of the equipment) 1 pc.

Developer material 1 pc.

Nozzle 1 pc. (for NAD)

Toner cartridge 1 pc.

Warranty sheet 1 pc. (for NAD and CND)

Setup report 1 set (for NAD, MJD and CND)

Customer satisfaction card 1 pc. (for MJD)

Packing list 1 pc. (for CND)

Customer survey sheet 1 pc. (for CND)

Certificate of conformance 1 pc. (for CND)

1 pc.

* Machine version

NAD: North America ASD: Hong Kong / Latin America AUD: Australia MJD: Europe ASU: Asia / Saudi Arabia SAD: Saudi Arabia ARD: Latin America CND: China TWD: Taiwan KRD: Korea JPD: Japan

1 - 5

SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES

Page 24

1.3 Options

Platen Cover KA-1650PC/PCC

Automatic Document Feeder (ADF) MR-2020/C

Reversing Automatic Document Feeder (RADF) MR-3023/C

Paper Feed Unit (PFU) MY-1027/C

Paper Feed Pedestal (PFP) KD-1022/C

Paper Feed Controller (PFC) GH-1060/C

Drawer Module MY-1028/C

Automatic Duplexing Unit (ADU) MD-0103/C

Fax Kit GD-1221NA/EU/AU/TW/CN/KR

External Keyboard GJ-1060/C/EU/KR/TW

Network Printer Kit GA-1191/C/KR/TW

Scanner Upgrade Kit GA-1201/C/KR/TW

Operator’s manual pocket KK-1660/C

Damp Heater MF-1640U/E

Harness Kit GQ-1130

Desk MH-1640

Notes:

• When the paper feed pedestal (KD-1022) or automatic duplexing unit (MD-0103) is installed, the paper feed controller (GH-1060) is also required to be installed.

• The external keyboard (GJ-1060) is necessary for the installation of the fax kit (GD-1221) and the scanner upgrade kit (GA-1201).

1 - 6

Page 25

1.4 Supplies

Drum OD-1600 (except for China)

OD-2320 (for China)

Toner cartridge PS-ZT1810 (1) (for North America)

PS-ZT1810A (1) (for Central and South America) PS-ZT1810D (1) (for Asia) PS-ZT1810D5k (1) (for Asia) PS-ZT1810C (1) (for China) PS-ZT1810C10k (1) (for China) PS-ZT1810C5k (1) (for China) PS-ZT1810T (1) (for Taiwan) PS-ZT1810T5k (1) (for Taiwan) PS-ZT1810E (1) (for Europe) PS-ZT1810E5K (1) (for Europe)

Developer material D-2320 (except for China)

D-2320C (for China)

1 - 7

SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES

Page 26

1.5 System List

)

RADF

(

MR-3023

Document Feeder

Reversing Automatic

)

ADF

(

MR-2020

Automatic

Document Feeder

KA-1650PC

Platen Cover

Automatic

Duplexing Unit

GJ-1060

MF-1640

Damp Heater

External Keyboard

)

ADU

(

MD-0103

)

PFC

(

GH-1060

Controller

Paper Feed

Network

GA-1191

Printer Kit

)

PFU

(

MY-1027

Paper Feed Unit

Scanner

GA-1201

Upgrade Kit

Desk

MH-1640

)

PFP

(

Pedestal

Paper Feed

KD-1022

MY-1028

Drawer Module

GQ-1130

Harness Kit

Fig. 1-2

Fax Kit

GD-1221

1 - 8

Page 27

2. OUTLINE OF THE MACHINE

2.1 Sectional View

1. Front side

A2 A1A3

J7J6

F1F2F3

J4J5 J8

J3 J9

J1 J2

L3 L1 I7

H4 H5

H1 G2 G1 G3 L3 I1

C5 L2 E2 E1

A1 Original glass

A2 ADF original glass

A3 Contact image sensor unit (CIS)

A4 Scanner damp heater (Left side) DH1

A5 Scanner damp heater (Right side) DH2

A6 Scanner damp heater thermostat THMO2

A7 Automatic original detection sensor S9-S13

B1 Laser optical unit

B2 Polygonal motor M4

C1 Pickup roller

C2 Separation claw

C3 Paper empty sensor S7

C4 Registration sensor S4

C5 Registration roller

E1 Bypass pickup roller

E2 Bypass feed roller

E3 Bypass separation pad

E4 Bypass paper sensor S8

B1B2 C1 C2C3

I11

I4 I3I2I6I8

I10K1

Fig. 2-1

2 - 1

OUTLINE OF THE MACHINE

Page 28

E5 Bypass tray

F1 Needle electrode

F2 Main charger

F3 Main charger grid

F4 Toner cartridge

G1 Transfer charger wire

G2 Separation charger wire

G3 Transfer guide roller

H1 Drum

H2 Discharge LED

H3 Drum cleaning blade

H4 Recovery blade

H5 Drum separation finger

I1 Developer sleeve (Magnetic roller)

I2 Mixer-1

I3 Mixer-2

I4 Mixer-3

I5 Doctor blade

I6 Auto-toner sensor S6

I7 Toner recovery auger

I8 Toner recycle auger

I9 Drum thermistor THMS4

I10 Drum damp heater DH3

I11 Drum damp heater thermostat THMO3

J1 Fuser roller

J2 Pressure roller

J3 Fuser roller separation finger

J4 Center heater lamp LAMP1

J5 Side heater lamp LAMP2

J6 Center/Side/Edge thermistor THMS1/2/3

J7 Fuser thermostat THMO1

J8 Exit roller

J9 Exit sensor S5

K1 Front cover opening/closing switch SW4

K2 Front cover opening/closing interlock switch SW3

K3 Temperature/humidity sensor S3

K4 Switching regulator

K5 ADU cover opening/closing interlock switch SW2

L1 ADU upper transport roller

L2 ADU lower transport roller

L3 ADU paper guide

2 - 2

Page 29

2. Rear side

M1 M2

S2 S1

M1 Scan motor

M2 Toner motor

M3 Main motor

M5 Exhaust fan

M6 Switching regulator cooling fan

M7 Exit motor (Option)

M8 ADU motor (Option)

S1 CIS home position sensor

S2 Platen sensor

SW5 Drawer detection switch

CLT1 Registration clutch

SOL1 Pickup solenoid

SOL2 Bypass pickup solenoid

CLT1

SW5

Fig. 2-2

M3SOL1SOL2 M6

2 - 3

OUTLINE OF THE MACHINE

Page 30

2.2 Electric Parts Layout

[A] Scanner, control panel

CIS

LT series models

S13

S12

S11

DH2

THMO2

LCD

HPNL

S13

S12

S11

S10

DH1

Fig. 2-3

2 - 4

Page 31

[B] Power supply section, switches

SW3

SW2

SW4

SW1

Fig. 2-4

2 - 5

OUTLINE OF THE MACHINE

Page 32

[C] Laser optical unit, fuser unit, toner cartridge section

CTRG

CTIF

LAMP1

LAMP2

SNS

THMO1

THMS1

LDR

THMS2

Fig. 2-5

2 - 6

THMS3

Page 33

[D] Developer unit section

ERS

THMS4

FUS

THMO3

DH3

Fig. 2-6

2 - 7

OUTLINE OF THE MACHINE

Page 34

[E] Driving section

SRAM

MAIN

CLT1

PFC

SOL1

Fig. 2-7

2 - 8

Page 35

[F] Drawer section

SW5

Fig. 2-8

2 - 9

OUTLINE OF THE MACHINE

Page 36

[G] Bypass unit, automatic duplexing unit

ADU

SOL2

Fig. 2-9

2 - 10

Page 37

2.3 Symbols and Functions of Various Components

The column "P-I" shows the page and item number in the parts list.

1. Motors

Symbol Name Function Remarks P-I

M1 SCAN-MOT

Scan motor

M2 TNR-MOT

Toner motor

M3 MAIN-MOT

Main motor

M4 M/DC-POL

Polygonal motor

M5 EXT-FAN-MOT

Exhaust fan

M6 PS-FAN-MOT

Switching regulator cooling fan

M7 EXIT-MOT

Exit motor

M8 ADU-MOT

ADU motor

Driving the CIS Fig. 2-3 10-1

Supplying the toner Fig. 2-5 12-15

Driving the drum, developer unit, registration roller, Pickup roller, feed roller, cleaner unit

Driving the polygonal mirror Fig. 2-5 5-13

Exhausting ozone and cooling down the equipment inside

Cooling down the switching regulator Fig. 2-4 5-11

Driving the fuser unit and exit roller *Option

Driving the automatic duplexing unit *Option

Fig. 2-7 12-2

Fig. 2-6 11-23

Fig. 2-5 MD-0103

Fig. 2-9 MD-0103

2-2

1-23

2 - 11

OUTLINE OF THE MACHINE

Page 38

2. Sensors and switches

Symbol Name Function Remarks P-I

S1 HOME-SNR

CIS home position sensor

S2 PLTN-SNR

Platen sensor

S3 TEMP/HUMI-SNR

Temperature/humidity sensor

S4 RGST-SNR

Registration sensor

S5 EXIT-SNR

Exit sensor

S6 ATTNR-SNR

Auto-toner sensor

S7 EMP-SNR

Paper empty sensor

S8 SFB-SNR

Bypass paper sensor

S9-13 APS 1-3, APS-C, APS-R

Automatic original detection sensor

SW1 MAIN-SW

Main switch

SW2 ADU-COV-INTLCK-SW

ADU cover opening/closing interlock switch

Detecting CIS home position Fig. 2-3 10-106

Detecting the opening/closing of platen

Fig. 2-3 9-101

cover or RADF

Detecting the temperature and humidity

Fig. 2-4 5-16

inside the equipment

Detecting the transporting paper at the

Fig. 2-7 15-107

registration roller section

Detecting the transporting paper at the

Fig. 2-5 24-8

exit section

Detecting the density of toner in the

Fig. 2-6 21-46

developer unit

Detecting presence/absence of paper

Fig. 2-8 15-107

in the drawer

Detecting presence/absence of paper

Fig. 2-9 13-101

on the bypass tray

Detecting original size * S9: only for A4 series models

Fig. 2-3 9-9,

9-19

Turning ON/OFF of the equipment Fig. 2-4 5-4

Controlling cutoff and supply of the 24V

Fig. 2-4 6-8 voltage by opening/closing of the ADU cover

SW3 FRNT-COV-INTLCK-SW

Front cover opening/closing interlock switch

SW4 FRNT-COV-SW

Front cover opening/closing switch

SW5 CST-SW

Drawer detection switch

Controlling cutoff and supply of the 24V voltage by opening/closing of the front cover

Detecting the opening/closing of the front cover

Detecting presence/absence of the drawer

Fig. 2-4 1-5

Fig. 2-4 1-101

Fig. 2-8 16-110

3. Electromagnetic clutch

Symbol Name Function Remarks P-I

CLT1 RGST-CLT

Driving the registration roller Fig. 2-7 16-21

Registration clutch

4. Solenoids

Symbol Name Function Remarks P-I

SOL1 CST-SOL

Pickup solenoid

SOL2 SFB-SOL

Bypass pickup solenoid

Controlling the power transmission of the feed roller

Controlling the power transmission of the bypass pickup roller

Fig. 2-7 16-9

Fig. 2-9 14-15

2 - 12

Page 39

5. PC boards

Symbol Name Function Remarks P-I

MAIN PWA-F-MAIN

Main PC board (MAIN board)

SRAM PWA-F-SRAM

SRAM PC board (SRAM board)

LDR PWA-F-LDR

Laser driving PC board (LDR board)

SNS PWA-F-SNS

H-sync signal detection PC board (SNS board)

HPNL PWA-F-HPNL

Control panel PC board (HPNL board)

CTIF PWA-F-CTIF

Toner cartridge interface PC board (CTIF board)

CTRG PWA-F-CTRG

Toner cartridge PC board (CTRG board)

FUS PWA-F-FUS

Fuse PC board (FUS board)

PFC PWA-F-PFC

Paper feed controller PC board (PFC board)

Controlling the whole system and

Fig. 2-7 7-1 image processing

Storing the setting information of the

Fig. 2-7 7-33 equipment

Driving the laser diode Fig. 2-5 5-13

Detecting the laser beam position Fig. 2-5 5-13

Detecting the button entry and

Fig. 2-3 4-20 controlling LED and LCD on the control panel

Interface for detecting the toner

Fig. 2-5 7-30 cartridge (Detecting the CTRG board)

Storing the status of the toner cartridge Fig. 2-5 103-3

Supplying power to each damp heater

Fig. 2-6 7-12 * Optional for NAD/MJD/CND model,

standard for other models

Controlling the automatic duplexing unit

Fig. 2-7 7-35 and paper feed pedestal *Option

ADU PWA-F-ADU

ADU driving PC board (ADU board)

Controlling the automatic duplexing unit *Option

Fig. 2-9 MD-0103

6. Lamps and heaters

Symbol Name Function Remarks P-I

LAMP1 CNTR-LAMP

Center heater lamp

LAMP2 SIDE-LAMP

Side heater lamp

ERS LP-ERS

Discharge LED

DH1 SCN-DH-L

Scanner damp heater (Left)

DH2 SCN-DH-R

Scanner damp heater (Right)

DH3 DRM-DH

Drum damp heater

Heating the center section of the fuser roller

Heating the section of both sides of the fuser roller

Removing the residual charge from the drum surface

Preventing condensation in the scanner unit * Optional for NAD/MJD/CND model,

standard for other models

Preventing condensation in the scanner unit * Optional for NAD/MJD/CND model,

standard for other models

Preventing condensation of the drum * Optional for NAD/MJD/CND model,

standard for other models

Fig. 2-5 23-12

Fig. 2-5 23-13

Fig. 2-6 20-13

Fig. 2-3 9-17

Fig. 2-3 9-18

Fig. 2-6 8-6

1-13

2 - 13

OUTLINE OF THE MACHINE

Page 40

7. Thermistors and thermostats

Symbol Name Function Remarks P-I

THMS1 THMS-C-HTR

Center thermistor

Detecting the surface temperature at the center of the fuser roller (for

Fig. 2-5 23-6

controlling the center heater lamp)

THMS2 THMS-S-HTR

Side thermistor

Detecting the surface temperature at the rear side of the fuser roller (for

Fig. 2-5 23-6

controlling the side heater lamp)

THMS3 THMS-EDG-HTR

Edge thermistor

Detecting the surface temperature at the edge of the rear side of the fuser

Fig. 2-5 23-6

roller (for preventing overheating)

THMS4 THMS-DRM

Drum thermistor

THMO1 THERMO-FSR

Detecting the temperature on the drum

Fig. 2-6 21-49 surface

Preventing overheating in the fuser unit Fig. 2-5 23-5

Fuser thermostat

THMO2 THERMO-SCN-DH

Scanner damp heater thermostat

Preventing overheating in the scanner damp heater

Fig. 2-3 9-20

* Optional for NAD/MJD/CND model,

standard for other models

THMO3 THERMO-DRM-DH

Drum damp heater thermostat

Preventing overheating in the drum damp heater

Fig. 2-6 8-7

* Optional for NAD/MJD/CND model,

standard for other models

8. Others

Symbol Name Function Remarks P-I

CIS CIS

Contact image sensor unit

PS PS-ACC

Switching regulator

LCD LCD

LCD panel

Reading originals Fig. 2-3 9-8

• Generating DC voltage and

Fig. 2-4 5-2

supplying it to each section of the equipment

• Generating high voltage and

supplying it to the main charger, developer, transfer and separation units

• Supplying AC power to the heater

lamp

Displaying each information Fig. 2-3 4-19

2 - 14

Page 41

2.4 General Description

2.4.1 System block diagram

)

device

10BASE-T/

USB connector

(

LAN connector

(

100BASE-TX)USB connector

Network printer kit

)

device

(

USB connector

)

16 bit (

SDRAM bus

)

host (

Scanner upgrade kit

SDRAM

16 16

SDRAM

64 MB

32 MB

16 MB

Battery

FAX board

NCU board

MODEM

SRAM

Battery

SRAM board

Control panel

128 kB

RTC

Download JIG

TELBOOK board

External keyboard

CPU bus (16 bit)

512 kB

Flash ROM

4 MB

Flash ROM

Clutches

Solenoids

Bypass unit

I/O

PFU

Motors

Sensors

Switches

)

ASIC

I/O port

(

Copy key card /

Coin controller

: Option

MAIN board

ADF/RADF

AFE

CIS

Driver

Scan motor

)

High voltage

(

LVPS

HVPS

Power supply unit

SoC

(System controller)

D/A

converter

Laser optical unit

Fig. 2-10

ASIC

Laser diode

LDR board

Laser beam sensor

SNS board

A/D

converter

Drum thermistor

Auto-toner sensor

Developer unit

sensor

Thermistors

Temperature/humidity

Fuser unit

ADU

PFC

PFP

OUTLINE OF THE MACHINE

2 - 15

Page 42

2.4.2 Construction of boards

[ 1 ] Construction diagram of boards

This system consists of the following including the MAIN board as a main board.

Control panel

HPNL

Toner cartridge

CTRGCTIF

Laser optical unit

LDR

SNS

Automatic duplexing unit

ADU

AC input

Scanner unit

CIS

FUS

PS-ACC

Main switch Cover opening/closing

SRAM

HVPS

LVPS

interlock switches

DC power supply line

AC power supply line

Signal line

MAIN

PFC

Fig. 2-11

[ 2 ] Function of each board

• MAIN board: This is the board taking the leading part in all systems. It consists of the SoC, ASIC, memory (SDRAM, Flash ROM), etc. In the SoC (System control), which is a core of this MAIN board, the functions of the CPU, image processing, page memory control, CODEC, external interface (USB) control, etc. are embedded and performed by one chip. Based on the data input from the control panel, the SoC controls each system, such as the ASIC, each memory, CIS unit and laser optical unit, and thus permitting the scanning of originals and the printing of data.

• SRAM board: This is the board on which the SRAM for storing the user's setting information and counter value and its backup function are mounted. When the MAIN board is replaced, attaching this board to the new MAIN board can assume the data of the previous equipment.

• HPNL board: This is the board on which each button switch and LEDs on the control panel, and the LCD control circuit are mounted.

• CTRG board: This is the board on which the IC chip for storing information about the toner cartridge (number of prints, identification data, etc.) is mounted.

• CTIF board: This is the interface board with the CTRG board in the toner cartridge. Information written in the IC chip on the CTRG board is read into the SoC on the MAIN board through this board.

• LDR board: This is the board on which the laser diode and the ASIC are mounted. The laser is emitted based on the image data signal output from the SoC on the MAIN board.

2 - 16

Page 43

• SNS board: This is the board on which the light sensor for detecting the radiating position of the laser is mounted. It outputs the H-sync signal to the SoC on the MAIN board.

• PS-ACC: This is the unit to generate each DC (high/low) voltage, which is used in the equipment, from the external AC electric power input. This is then provided to each electric part.

• FUS board: This is the board to provide AC electric power for driving the damp heater. * Optional for NAD/MJD/CND model, standard for other models.

•CIS: This is the unit witch performs optical-to-electrical conversion to convert the light reflected by the original into the electrical signals. It consists of a light source (LEDs), optical system, CCD sensor, etc.

• PFC board: This is the board to control the optional Automatic Duplexing Unit (ADU) and optional Paper Feed Pedestal (PFP).

• ADU board: This is the board to control the optional Automatic Duplexing Unit (ADU). It detects paper feeding with a sensor mounted on the ADU board.

2 - 17

OUTLINE OF THE MACHINE

Page 44

2.5 Disassembly and Replacement of Covers

2.5.1 Front cover

(1) Open the front cover. (2) Release the upper hinge. (3) Take off the front cover while lifting it up.

2.5.2 Inner tray

(1) Remove 2 screws and take off the Inner tray.

Front cover

Fig. 2-12

Inner tray

Fig. 2-13

2.5.3 Left cover

(1) Take off the Inner tray.

 P.2-18 "2.5.2 Inner tray"

(2) Remove 4 screws and take off the left cover.

Left cover

Fig. 2-14

2 - 18

Page 45

2.5.4 Tray rear cover

(1) Take off the left cover.

 P.2-18 "2.5.3 Left cover"

(2) Take off the tray rear cover.

2.5.5 Front right cover

(1) Take off the front cover.

 P.2-18 "2.5.1 Front cover"

(2) Pull out the toner cartridge. (3) Open the ADU cover. (4) Remove 2 screws and take off the front right

cover.

Tray rear cover

Fig. 2-15

Front right cover

2.5.6 Front upper cover

(1) Remove 1 screw and take off the front upper

cover.

Fig. 2-16

Front upper cover

Fig. 2-17

2 - 19

OUTLINE OF THE MACHINE

Page 46

2.5.7 ADU cover

(1) Open the bypass tray. (2) Open the ADU cover. (3) Open the transfer unit and release the ADU

stopper on the front side.

(4) Remove 1 screw and take off the ADU

stopper on the rear side.

Note:

Be careful not to fall off the ADU cover when the screws are removed from the ADU stopper.

(5) Take off the ADU cover while sliding it toward

the right.

ADU stopperADU stopper

Fig. 2-18

ADU cover

2.5.8 Right front cover

(1) Take off the front cover.

 P.2-18 "2.5.1 Front cover"

(2) Open the ADU cover. (3) Pull out the drawer. (4) Remove 2 screws and take off the right front

cover.

Fig. 2-19

Right front cover

Fig. 2-20

2 - 20

Page 47

2.5.9 Right rear cover

(1) Open the ADU cover. (2) Remove 1 screw and take off the ADU

stopper on the rear side.

(3) Take off the 2 screw and take off the right

rear cover.

2.5.10 Rear cover

(1) Remove 5 screws and take off the rear

cover.

Right rear cover

Fig. 2-21

Fig. 2-22

Rear cover

2 - 21

OUTLINE OF THE MACHINE

Page 48

2.6 Disassembly and Replacement of PC boards

Notes:

• When the PC board/HDD is replaced, refer to each CAUTIONS of TROUBLESHOOTHING in the SERVICE HANDBOOK.

• If the PC board has to be replaced due to an operational defect, this may have been caused by a contact failure of the connector. Before replacing the board, disconnect and then reconnect the connector to check if this action eliminates the operational defect.

2.6.1 MAIN board (MAIN)

(1) Take off the rear cover.

 P.2-21 "2.5.10 Rear cover"

(2) Disconnect 16 connectors.

Note:

Connect the flat harness to the MAIN board with its electrode side down. An error “CA2” will be displayed if the connection is incorrect.

(3) Remove 6 screws and take off the MAIN

board.

Notes:

1. When replacing the MAIN board, also attach the SRAM board to the new MAIN board from the old MAIN board.

2. Be sure to perform “08-389” after the SRAM board has been replaced.

3. Be sure to perform "05-310" with the platen cover or the ADF/RADF closed after replacing the MAIN board.

Fig. 2-23

MAIN board

Fig. 2-24

2 - 22

Page 49

2.6.2 SRAM board (SRAM)

(1) Take off the rear cover.

 P.2-21 "2.5.10 Rear cover"

(2) Release 1 lock support and take off the

SRAM board.

Notes:

1. Be sure to perform “08-388” after the SRAM board has been replaced.

2. Perform "05-310" with the platen cover and the ADF/RADF closed after replacing the SRAM board.

3. Make sure that the direction of the battery on the SRAM board is correct when replacing it.

SRAM board

Fig. 2-25

SRAM board

Battery

Fig. 2-26

2.6.3 Fuse PC board (FUS)

Note:

This fuse PC board is copacked with the damp heater unit. (The damp heater unit is optional for NAD, CND and MJD.)

(1) Take off the rear cover.

 P.2-21 "2.5.10 Rear cover"

(2) Remove 2 screws and take off the cover.

Cover

Fig. 2-27

2 - 23

OUTLINE OF THE MACHINE

Page 50

(3) Disconnect 2 connectors, remove 1 screw,

and then take off the fuse PC board by lifting it up.

Fuse PC board

2.6.4 Paper feed controller PC board (PFC)

Note:

This paper feed controller PC board is optional for NAD, CND and MJD.

Connector

Fig. 2-28

(1) Take off the rear cover.

 P.2-21 "2.5.10 Rear cover"

(2) Disconnect 2 connectors, remove 4 screws,

and then take off the paper feed controller PC board and mylar sheet.

Notes:

• If the ADU (optional) is installed, disconnect 2 connectors of the ADU with other connectors at the same time before taking off the paper feed controller PC board.

• If the PFP (optional) is installed, disconnect 2 connectors of the PFP with other connectors at the same time before taking off the paper feed controller PC board.

Connector (ADU

Connector (PFP

Connector

)

Mylar

Paper feed controller PC board

Fig. 2-29

2 - 24

Page 51

2.6.5 Switching regulator unit (PS)

(1) Take off the left cover.

 P.2-18 "2.5.3 Left cover"

(2) Disconnect 15 connectors.

Note:

The number of connectors to be disconnected is 15 when the following options are installed. A: Paper Feed Controller (GH-1060) B: Fax Kit (GD-1220/1221)

Fig. 2-30

Note:

Connect the connectors to the correct faston terminals on the switching regulator board. Connector Harness F. Red - Black-thick E. Blue - White-thick D. White - Black-thin C. White - Red-thin B. White - Red-thick A. White - White-thick

(3) Remove 2 screws, slide the switching

regulator unit with the whole case slightly to the front, and then lift it up to take it off.

Fig. 2-31

Switching regulator unit

Fig. 2-32

2 - 25

OUTLINE OF THE MACHINE

Page 52

(4) Disconnect 7 connectors. (5) Remove 1 screw and 1 ground wire.

Connector Connector

Fig. 2-33

Note:

Make sure that the position is correct when inserting the connector.

(6) Remove 8 screws, release 1 locking support,

and take off the switching regulator board.

Green/Yellow

Black

White

White Gray

Black Brown

Locking support

Fig. 2-34

Switching regulator board

Fig. 2-35

2 - 26

Page 53

2.6.6 Switching regulator cooling fan (M6)

(1) Take off the left cover.

 P.2-18 "2.5.3 Left cover"

(2) Disconnect 1 connector and take off the

switching regulator cooling fan while sliding it upward.

Switching regulator cooling fan

Connector

Fig. 2-36

2 - 27

OUTLINE OF THE MACHINE

Page 54

2.7 Removal and Installation of Options

2.7.1 MR-2020 (Automatic Document Feeder (ADF))/MR-3023 (Reversing Automatic Document Feeder (RADF))

(1) Turn the power OFF and unplug the power

cable.

(2) Remove 1 screw and take off the connector

cover.

Fig. 2-37

(3) Remove the ground wire.

(4) Disconnect the connector.

Fig. 2-38

Fig. 2-39

2 - 28

Page 55

(5) Remove 1 screw on the rear right side.

(6) Remove the cover on the rear right side.

Fig. 2-40

(7) Remove 1 screw and 1 washer on the rear

left side.

(8) Open the ADF/RADF.

Fig. 2-41

Fig. 2-42

Fig. 2-43

2 - 29

OUTLINE OF THE MACHINE

Page 56

(9) Remove 2 screws on the front side.

(10) Slide the ADF/RADF backward and take off

by lifting it up.

Fig. 2-44

2.7.2 MY-1027 (Paper Feed Unit (PFU))

[G-1] When PFP is not installed

(1) Turn the power OFF and unplug the power

cable.

(2) Remove 1 screw and take off the PFU

connector cover.

Fig. 2-45

Fig. 2-46

2 - 30

Page 57

(3) Remove the ground wire.

(4) Disconnect the connector.

Fig. 2-47

(5) Install the PFU connector cover.

(6) Take off the rear cover.

 P.2-21 "2.5.10 Rear cover"

(7) Disconnect 1 connector (optional damp

heater). Release the harness from the harness clamp.

Fig. 2-48

Fig. 2-49

Fig. 2-50

2 - 31

OUTLINE OF THE MACHINE

Page 58

(8) Take off the drawer of the equipment and

PFU drawer.

(9) Remove 1 screw and take off 1 fixing bracket

on the front left side.

Fig. 2-51

(10) Remove 1 screw and take off 1 fixing bracket

on the front right side.

(11) Remove 1 screw and take off 1 fixing bracket

on the rear left side.

Fig. 2-52

Fig. 2-53

Fig. 2-54

2 - 32

Page 59

(12) Remove 1 screw and take off 1 fixing bracket

on the rear right side.

(13) Lift up the equipment and take off the PFU.

Fig. 2-55

[G-2] When PFP is installed

(1) Take off the rear cover.

 P.2-21 "2.5.10 Rear cover"

(2) Remove 1 ground wire and 2 connectors.

Fig. 2-56

Fig. 2-57

2 - 33

OUTLINE OF THE MACHINE

Page 60

(3) Take off the equipment from the PFU.

 P.2-30 "[G-1] When PFP is not installed"

(4) Take off the PFP drawer.

(5) Remove 1 screw and take off 1 fixing bracket

on the front left side.

Fig. 2-58

(6) Remove 1 screw and take off 1 fixing bracket

on the front right side.

(7) Remove 1 screw and take off 1 fixing bracket

on the rear left side.

Fig. 2-59

Fig. 2-60

Fig. 2-61

2 - 34

Page 61

(8) Remove 1 screw and take off 1 fixing bracket

on the rear right side.

(9) Take off the PFU while lifting it up.

Fig. 2-62

2.7.3 KD-1022 (Paper Feed Pedestal (PFP))

(1) Take off the equipment and the PFU. Then

take off the PFP.  P.2-33 "[G-2] When PFP is installed"

Fig. 2-63

Fig. 2-64

2 - 35

OUTLINE OF THE MACHINE

Page 62

2 - 36

Page 63

3. COPY PROCESS

3.1 General Description of Copying Process

Paper exit

(2)

Data reading(scanning)

CIS

600 dpi,7084 pixel

Image processing

(1)

Charging

e-STUDIO167/207:-448V e-STUDIO237 :-454V

(grid voltage)

(3)

Data writing

Semiconductive laser

Pw=4.0 nJ/mm

(10)

Discharging

Discharge LED (red)

Wavelength 660nm x10pcs

(4)

Development

Magnetic roller

Bias -340VDC+AC

Fig. 3-1

(9)

Cleaning

Blade method

Toner

Carrier

(8)

Fusing

Lamp heating method

564W x2

(7)

H -107 µADC C -107 µADC L -70 µADC

(6)

H 340 µADC C 369 µADC L 282 µADC

(5)

DC +565V

Bypass feeding

(

100 sheets

Drawer feeding

(

250 sheets

PFU

(

250 sheets

Separation

Transfer

Transfer bias

)

(1) Charging: Applies negative charge on the

surface of the photoconductive drum.



(2) Data reading: The images on the original

are converted into electrical signals.



(3) Data writing: The electrical signals are

converted into light signal (laser emission) which exposes the surface of the photoconductive drum.



(4) Development: Negatively-charged toner

adheres to the photoconductive drum and forms visible image.



(5) Transfer bias: Improves transfer efficiency.



(6) Transfer: Transfers the visible toner image

on the photoconductive drum onto paper.



(7) Separation: Separates paper with the toner

image from the photoconductive drum.

(8) Fusing: Fuses the toner image onto the

paper by applying heat and pressure.

(9) Cleaning: Scrapes off the residual toner

from the drum.

(10) Discharging: Eliminates the residual

negative charge from the surface of the photoconductive drum.

3 - 1

COPY PROCESS

Page 64

3.2 Details of Copying Process

1. Photoconductive drum

The photoconductive drum consists of two layers.The outer layer is a photoconductive layer made of an organic photoconductive carrier (OPC), and the inner layer is an aluminum conductive base in a cylindrical form. The photoconductor has the following property: when it is exposed to light, the electrical resistance it possesses increases or decreases according to the strength of the light. Example:

- Strong light Resistance is decreased (works as a conductor.)

- Weak light Resistance is increased (works as an insulator.)

Photoconductive layer

Base

Structure of the photoconductive drum

(

Example of OPC

Fig. 3-2

[Formation of electrostatic latent image] In the processes of charging, data reading, data writing, discharging described later, negative potential of the areas on the drum corresponding to black areas of the original are eliminated, while the areas on the drum corresponding to white areas retains the negative charge. As this image on the drum formed by the negative potential is not visible, it is called an “electrostatic latent image.”

)

Time (t

)

(

Black area of original

Surface potential

-500

Discharge

Charging

process

Electric potential of the photoconductive drum

Fig. 3-3

White area of original

3 - 2

Page 65

2. Charging Charging is the process to apply charge evenly on the drum surface. The needle electrode produces negative corona discharge is controlled by the grid, allowing the drum surface to be evenly charged with the negative potential. The surface potential on the drum is determined by the grid potential and is controlled to a certain value by the grid control circuit.

Main charger

Drum rotation

Grid control circuitHigh-voltage

transformer

Fig. 3-4

3. Data reading (scanning) Data reading is the process of illuminating the original with light and converting the reflected light into electrical signals. This equipment uses the CIS (Contact Image Sensor) for data reading. The optical image information read by the CIS is converted into electrical signals (image signals), which are then transmitted to the image processing section.

CIS

Image processing

Fig. 3-5

section

(Example)

Light receiving amount

Light

Dark

Value of image signals to be output

255

Difference between "light " and "dark" is divided into 256 steps.

Fig. 3-6

3 - 3

COPY PROCESS

Page 66

4. Data writing Data writing is the process of converting the image signals sent from the image processing section into optical signal and exposing the drum surface with the light. Semiconductive laser element converts image signals transmitted from the image processing section into optical signal (laser emission) to expose the drum surface and form an electrostatic latent image on it.

Image

processing

section

LDR board

Polygonal mirror

Semiconductive laser element

Photo-

conductive

drum

Fig. 3-7

3 - 4

Page 67

5. Development Development is the process of making the electrostatic latent images visible to the eye (visible images). Developer material is supplied to the photoconductive drum surface by the magnetic roller. The toner in the developer material adheres to the areas on the drum surface where the potential is lower than the developer bias which is applied to the magnetic roller (reverse development method).

Magnetic roller

Fig. 3-8

Drum

Magnetic roller

Bias voltage

- 357 VDC

Photoconductive drum

White background

Magnet

Halftone

Fig. 3-9

Toner

Carrier (always attracted onto the magnet

Toner

Photoconductive layer

Aluminum base

Solid

)

White background

The (-) potential of the photoconductive drum is higher than the developer bias.

The (-) potential of the photoconductive drum is lower than the developer bias.

- 440V

- 340V

- 300V

- 200V

- 100V

Fig. 3-10

Image not developed

Image developed by toner

Bias potential

- Charging AC bias

To obtain the stable development characteristics, AC bias (approx. 1,100 V) is charged to the development bias (DC bias).

3 - 5

COPY PROCESS

Page 68

- Developer material

The developer material consists of a mixture of the toner and carrier. The toner is charged to the negative polarity and the carrier to positive polarity due to the friction with each other caused by mixing.

Toner: Mainly consists of the resin and carbon. Carrier: Consists of the ferrite and resin coating on

its surface to provide consistent frictional electrification.

Note:

If the developer material is used for a long time (beyond its normal life span), the toner is caked onto the carrier.



The charging performance of the carrier is lowered. Symptom: 1. Image density is lowered.

2. Toner scattering occurs.

3. Background fogging occurs.

Solution: Replace the developer material.

Resin (90-95%

[

Toner

)

]

Carbon (

5-10%

Approx

12.5 μm

[

Carrier

Fig. 3-11

)

]

Toner

Ferrite

Approx 65 μm

Carrier

No frictional electrification occurs on the area where the toner is caked.

Fig. 3-12

3 - 6

Page 69

- Magnetic roller

Magnetic brush development The south and north poles are arranged inside the magnetic roller as shown in the right figure. The developer material forms a brush-like fluff which contacts the photoconductive drum surface.



This is caused by the magnetic force lines between the south and north poles.

Photoconductive drum

Magnetic roller

Fig. 3-13

Magnetic force line

3 - 7

COPY PROCESS

Page 70

- Additional Explanation

The life of the toner cartridge (number of output pages) varies depending on the following conditions.

Coverage of originals (printing image ratio of the original size) and density of original background

Size and density of originals

The existence of solid black when making prints (when a book is copied and the original cover is partially opened)

Temperature and humidity in the room when making prints.

Prints density and image quality mode As indicated in the figure below, the life of the toner cartridge varies depending on the copy mode and coverage of originals.

Is this graph, the toner consumption for copying in TEXT/PHOTO mode using chart “A” is defined as 100%.

Output pages

140%

24,000 or

5,900 pages

Type of originals

100%

80%

43%

36%

A AB C A

TEXT/PHOTO TEXT PHOTO

ABC

Fig. 3-14

3 - 8

Page 71

6. Transfer Transfer is the process of transferring the toner image (visible image) formed on the drum surface onto paper.

Method: A paper passing the side of the drum is

charged to the opposite polarity to the that of toner by the corona discharge of the transfer charger.



The toner moves from the drum surface onto the paper.

Drum

Transfer charger

Fig. 3-15

- For smooth transfer

In the transfer bias processing of this equipment, bias voltage (+565 VDC) is applied to the registration roller and transfer unit transport guide to prevent the charge produced by the transfer charger from flowing into the transfer unit transport guide through the paper. Output is controlled as follows to realizes the desirable transfability.

Paper position against transfer point Transfer output

Paper

Leading edge (H) 340 µADC

Middle (C) 369 µADC

Trailing edge (L) 282 µADC

Direction of transportation

Drum rotation

Transfer charger

Toner

Fig. 3-16

3 - 9

COPY PROCESS

Page 72

7. Separation Separation is the process of separating paper which is temporarily adhering to the drum due to the static electricity during the transfer process.

Method: Apply negative DC bias to the separation

charger.



The positive charge on the paper is decreased.



The electrostatic adherence force between the

Drum rotation

paper and drum becomes weak.



The paper is separated from the drum by its own stiffness.

Separation charger

Direction of transportation

Fig. 3-17

- Output is controlled as follows to realizes the desirable separability.

Paper position against transfer point Separation output

Leading edge (H) -107 µADC

Middle (leading edge side)

Middle (trailing edge side)

Trailing edge

(L)

(C)

(L)

-70 µADC

-107 µADC

-70 µADC

Paper may not be separated from the drum surface because of moisture or malfunction of the transfer/separation charger during printing. As the result, the paper enters into the cleaner and causes jamming. To prevent this, a separation finger is used to forcibly separate the paper which was left around the drum.

Separation finger

Paper movement

Separation

Drum rotation

Fig. 3-18

charger

3 - 10

Page 73

8. Fusing Fusing is the process of melting the toner on the paper and fixing it firmly on the paper.

Method: The melting point of the toner (main

ingredient: resin) is 90-100°C.



(Heat) Toner is melted by the heat of the surface of

the fuser roller.

(Pressure) The pressure roller is pressed against the

fuser roller by the springs to increase the adherence of the melted toner onto the paper.



Heat and pressure are applied to the paper when it passes between the fuser roller and pressure roller.



(Fusing) The toner is fused on the paper.

Fuser roller

Separation finger

Fuser roller

Heater lamp

Paper movement

Paper

Fig. 3-19

Fig. 3-20

Pressure

(

Pressure

Pressure roller

)

9. Cleaning Cleaning is the process of removing the residual toner from the photoconductive drum.

The edge of the urethane rubber cleaning blade is pressed against the photoconductive drum surface to scrape off the residual toner on it. The toner is then caught by the recovery blade.

Recovery blade

Cleaning blade

Drum rotation

Fig. 3-21

3 - 11

COPY PROCESS

Page 74

10.Discharging Discharging is the process of eliminating the negative charge remaining on the photoconductive drum before the next charging process. If the residual charge is not eliminated, the following phenomenon occurs:

Negative charge remaining on the photoconductive drum surface causes ungiven application of the charge for the next printing.



The next print will have a double image. (The preceding image appears.)



Solution: The entire surface of the photoconductive drum is illuminated with light by the discharge LED array.



The photoconductive drum becomes electrically conductive.



All of the negative charge remaining on the photoconductive drum is conducted to the ground.



Preparation for the next printing is completed.

Discharge LED

Photoconductive drum

Ground

Fig. 3-22

3 - 12

Page 75

3.3 Comparison with e-STUDIO230/280

Process e-STUDIO230/280 e-STUDIO182/212/242

1. Photoconductive drum

• Sensitivity

• Surface potential

2. Charging

• Grid voltage

3. Data writing

•Light source

• Light amount

4. Development

• Magnetic roller

• Auto-toner

• Toner supply

• Toner-empty detection

• Toner

• Developer material

• Developer bias

5. Transfer

• Transfer bias

6. Separation Adjustable output

7. Discharge

• Discharging position

• Discharge LED

8. Cleaning

• Method

• Recovered toner

9. Fusing

• Method

• Cleaning

•Heater

OD-1600 (OPC ø30) Highly sensitized/durable drum

-475 V

Scorotron method

-495 V

Semiconductor laser (Adjustment not required)

4.0 nJ/mm

One magnetic roller Magnetic bridge-circuit method Toner cartridge Density detection method T-2320, T-2320E, T-2320D, T-2320C, T-2320T D-2320, D-2320C DC-357 V Adjustable output (during printing) AC 1100 V (Adjustment not required, during printing) DC+150 V Fixed (others)

Adjustable output (Constant current) +600 V (Adjustment not required)

(Constant current)

Exposure after cleaning Red LED

Cleaning blade Reuse (There is the recovered toner supply mechanism.)

Long-life fuser roller method Fuser roller: Thin roller coated with fluoroplastic (ø30) Pressure roller: PFA tube roller (ø30) Cleaning roller for pressure roller (ø16) Heater lamp Turned ON/OFF by thermistor

 

-440 V



-448 V (e-STUDIO167/207)

-454 V (e-STUDIO237)



   

T-1640, T-1640E, T-1640D T-1640C, T-1640T



DC -340 V Adjustment output (during printing) AC 1100 V (Adjustment not required, during printing) No DC+ (positive) output



+565 V (Adjustment not required)



 

Pressure roller: PFA tube roller (ø25) None



3 - 13

COPY PROCESS

Page 76

3 - 14

Page 77

4. GENERAL OPERATION

4.1 Overview of Operation

Operation of equipment Operation during initializing, pre-running and ready

Drawer feed copying by [START] button

Copying operation

Bypass feed copying

Interrupt copying

4 - 1

GENERAL OPERATION

Page 78

4.2 Description of Operation

4.2.1 Warming-up

1. Initialization Power ON

→ Heater lamp ON → “Please wait” is displayed → Fan motors ON → Initialization of scanning system

- The CIS unit moves to the home position.

- The CIS unit moves to the peak detection position.

- The LED of CIS is turned ON.

- Peak detection (white color is detected by the shading correction plate)

- The LED of CIS is turned OFF.

- The CIS unit moves to the home position. → “READY (WARMING UP)” is displayed

2. Pre-running operation (Only when the temperature is at 16 °C or less) The pre-running operation is started when the temperature of the fuser roller surface reaches a certain temperature. → The main motor is turned ON

- Fuser roller rotated.

- Drum rotated. → Pre-running operation stops after 15 seconds

3. When the surface temperature of the fuser roller becomes sufficient for fusing, → “READY” is displayed

4.2.2 Ready state (ready for copying)

Buttons on the control panel enabled → When no button is pressed for a certain period of time,

- Set number “1” is displayed. Equipment returns to the normal ready state.

4 - 2

Page 79

4.2.3 Drawer feed copying

1. Press the [START] button

→ “READY” → “COPYING” → CIS LED ON → Scan motor ON → CIS unit move forward → Polygonal motor rotates in high speed → Main motor and exit motor ON

- The drum, fuser unit, developer unit and exit roller are driven.

2. Drawer paper feeding → Main charger, developer bias and discharge LED ON. Fans are rotated in high speed. Pickup solenoid ON.

- Pickup roller start to rotate.

→ Pickup solenoid OFF after a certain period of time → Paper reaches the registration roller

- The registration sensor is turned ON and aligning is performed.

3. After the scanning operation:

→ Registration clutch ON after a certain period of time  paper is transported to the transfer area → Copy counter operates

4. After the registration clutch is turned ON:

→ Transfer charger ON after a certain period of time → Copy counter operates

5. Completion of scanning

→ Scan motor OFF → CIS LED OFF → Registration clutch OFF (after the trailing edge of the paper passed the registration roller) → Ready state

6. Paper exit

→ Exit sensor detects the trailing edge of the paper → Main charger, developer bias and discharge LED OFF → Polygonal motor, main motor and exit motor OFF → Drum, fuser unit and developer unit stop → Fans return to the ready rotation → “READY” is displayed and the equipment enters the ready state

7. Timing chart for copying one A4 size sheet fed from the drawer

Main motor

Registration sensor

Registration clutch

MVDEN signal

Exit sensor

1000

2000

4000

4 - 3

5000 6000 7000 8000 90003000

GENERAL OPERATION

Page 80

4.2.4 Bypass feed copying

1. Insert a sheet of paper into the bypass tray. → Bypass paper sensor ON

- Bypass feed priority state.

2. Press the [START] button

→ “READY” → “COPYING” → CIS LED ON → Scan motor ON → CIS unit move forward → Polygonal motor rotates in high speed → Main motor and exit motor ON

- The drum, fuser unit, developer unit and exit roller are driven.

3. Bypass feeding

→ Main charger, developer bias and discharge LED ON. Fans are rotated in high speed. → Bypass pickup solenoid ON

- The bypass pickup roller start to rotate.

- The bypass pickup roller is lowered.

- The bypass feed roller start to rotate.

→ Paper reaches the registration roller → Aligning operation → After a certain period of time, the bypass pickup solenoid OFF

4. Hereafter, the operation 3) through 6) of  P.4-3 "4.2.3 Drawer feed copying" is repeated.

4.2.5 Interruption copying

1. Press the [INTERRUPT] button

→ LED “INTERRUPT” ON → Copying operation in progress is temporarily stopped. CIS unit return to appropriate positions → “Job interrupted” is displayed → Automatic density and reproduction ratio 100% are set (The set number remains the same)

2. Select the desired copy condition

3. After the interruption copying is finished:

→ LED “INTERRUPT” OFF by pressing the [INTERRUPT] button → “READY to resume job” is displayed

4. Press the [START] button → The copying operation before the interruption is resumed

4 - 4

Page 81

4.3 Detection of Abnormality

When something abnormal has occurred in the equipment, the symbols corresponding to the type of abnormality are displayed.

4.3.1 Types of abnormality

1. Abnormality cleared without turning OFF the door switch (A) Add paper (B) Pick-up failure in bypass

2. Abnormality not cleared without turning OFF the door switch (C) Misfeed in equipment (D) Replace the toner cartridge (E) Developer unit not installed properly

3. Abnormality not cleared without turning OFF the main switch (F) Call for service

4 - 5

GENERAL OPERATION

Page 82

4.3.2 Description of abnormality

(A) Add paper

[In cases of the equipment drawer or the PFU / PFP drawer ] (When drawer is not installed)

• Drawer empty sensor detects the presence or absence of paper.

No drawer detected



“Add paper” is displayed The LED on the control panel corresponding to the drawer blinks (When the drawer is selected)



[START] button disabled

[In cases of the equipment drawer or the PFU drawer] (When the drawer is installed)

Drawer detected



Paper empty sensor OFF



“Add paper” is displayed The LED on the control panel corresponding to the drawer blinks (When the drawer is selected)



[START] button disabled

[In case of the PFP drawer] (When the drawer is installed)

• When the power is turned ON or the drawer is installed PFP starts initialization



The detection of paper existence starts Tray-up motor ON – Tray is raised

At this time, the tray-up sensor and paper empty sensor are OFF  When the tray-up sensor is not turned ON in a fixed period of time

Tray abnormality  “Add paper” is displayed regardless of the existence of paper

 Cleared by turning the power ON and then OFF  The tray-up sensor is turned ON in a fixed period of time

- The tray-up motor is stopped.

At this time, if the paper empty sensor is ON: It is judged that there is paper

OFF: It is judged that there is no paper



The lamp on the control panel corresponding to the drawer blinks (When the drawer is selected)

4 - 6

Page 83

• When paper becomes almost empty as they fed out during copying,

 The tray-up sensor is turned OFF.

 The tray-up motor is turned ON – the tray is raised.

 The tray-up sensor is turned ON.

 The tray-up motor is stopped.

• When the paper empty sensor is turned OFF even if the tray-up sensor is ON during copying,



The sensor is detecting that no paper exists.



The lamp on the control panel corresponding to the drawer blinks (When the drawer is selected)



Copying is stopped

(B) Pick-up failure in bypass

• During bypass feeding Bypass pickup solenoid ON



Registration sensor is not turned ON in a fixed period of time



“Misfeed in bypass“ is displayed : E12



Copying operation is disabled



Solution: The bypass paper sensor is turned OFF by removing the paper from the bypass tray.

4 - 7

GENERAL OPERATION

Page 84

• Exit sensor detects jamming of the leading edge of paper.



Registration clutch ON

Less than regulation time



Registration clutch

Exit sensor ON If the exit sensor is not turned ON after regulation time



Paper jam (E01)  The copying operation is stopped.

• Exit sensor detects jamming of the tailing edge of paper.



Registration clutch OFF

Less than regulation time



Registration clutch

Exit sensor OFF If the exit sensor is not turned OFF after regulation time



Paper jam (E02)  The copying operation is stopped.

Exit sensor

Timer

Exit sensor

Timer

Fig. 4-1

Fig. 4-2

Regulation time

Paper jam (E01)

OFF

Paper jam (E02)

Regulation time

• Immediately after the power ON



Any of all sensors on paper transport path detects paper (ON)



Paper jam (E03)

• Front cover is opened during copying



Paper jam (E41)

• The registration sensor (S4) is not turned ON in a fixed period of time when paper is fed out of the ADU.



Paper jam (E11)

4 - 8

Page 85

• The ADU sensor (on the ADU board) does not detect paper in a fixed period of time when the paper is transported within the ADU.



Paper jam (E51)

• Registration sensor detects jamming of the leading edge of paper: Registration sensor is not turned ON in a fixed period of time after the feeding starts.



Paper jam (E12, E13, E21, E30 and E33) (The error code differs depending on the paper source. Refer to the error code table in Service Handbook.)

• The PFU paper feed sensor is not turned ON in a fixed period of time after the pickup solenoid is turned ON.



Paper jam (E14)

• The PFP upper drawer feed sensor is not turned ON in a fixed period of time after the paper feed clutch is turned ON when paper is fed out of the PFP.



Paper jam (E15 and E36)

• The PFP lower drawer feed sensor is not turned ON in a fixed period of time after the paper feed clutch is turned ON when paper is fed out of the PFP.



Paper jam (E16)

• The PFU feed sensor is not turned ON in a fixed period of time after the paper feed clutch is turned ON when paper is fed out of the PFP.



Paper jam (E32 and E35) (The error code differs depending on its paper source. Refer to the error code list in the Service Handbook.)

(D) Replace the toner cartridge

• Toner density becomes low



Auto-toner sensor detects the absence of the toner



Control circuit  The toner lamp brinks: the copying operation disabled

Solution: Open the front cover and replace the toner cartridge with a new one.

Toner is supplied  copying operation enabled.

4 - 9

GENERAL OPERATION

Page 86

(E) Developer unit not installed properly

• Disconnection of the connectors of the developer unit



“Set process unit” is displayed. [START] button disabled.



Solution: Connect the connectors of the developer unit and close the front cover.

(F) Call for service

Error code is displayed instead of the set number by pressing the [CLEAR] button and [8] button simultaneously when the service call lamp is blinking. Refer to the error code table in the Service Handbook.

4 - 10

Page 87

5. CONTROL PANEL

5.1 General Description

The control panel consists of button switches to operate the equipment and select various modes, and LEDs and an LCD to display codes, values and the states (including each mode) of the equipment. The button switches, the LEDs and an LCD are mounted on the control panel PC board (HPNL) and are installed the inside of the control panel. When the operator’s attention is required, graphic symbols appear with messages explaining the condition of the equipment in the LCD panel.

Fig. 5-1

5 - 1

CONTROL PANEL

Page 88

5.2 Items Shown on the Display Panel

5.2.1 Display

1. Basic display Displays buttons and messages.

READY

100% NONSORT

ZOOM FINISHING EDIT

Fig. 5-2

2. Paper jam display Displays error code, paper jam position and paper jam release guidance.

Misfeed in copier

E41 Open side cover of the copier.

1/ 6

Fig. 5-3

3. Service call display Displays error code and service call symbol.

Call for service

Fig. 5-4

4. When input values can be changed by the up or down button in the self-diagnosis mode, the LED in the center of the up, down, left and right buttons is lit.

C01

5 - 2

Page 89

5.2.2 Message

No. Message Condition of machine Notes

1 Wait warming up Being warmed up

• Displayed after the main switch is turned ON up until the machine becomes ready for copying

2 READY Standby for copying

• The machine is ready for copying and operator's instructions on copying conditions can be input

• Returns to the default condition if no key is pressed for the setting time of auto clear timer

3 COPYING Now copying

• Displayed by pressing the START key

• Copy quantity indicator becomes "ex. 3→ 2 → 1→ 3" and copying is completed

4 Saving energy Energy saver conditions • Reset by pressing the any key

5 Select original size Platen sort copying standby state • When using original cover 6 - Timer off

• No message is displayed in the display panel

7 Cassette * empty Indication of lack of paper

• Indicates when there is no paper in cassette

• Bypass copying is possible

8 Toner empty Indication of lack of toner

• The toner in the toner cartridge becomes empty

• When this message is displayed, it is not possible to copy

9 Misfeed in bypass Bypass paper jamming (SFB)

• Paper jams at the bypass tray

10 Misfeed in copier

(Copier machine)

11 Misfeed in doc. Feeder

(ADF)

12 Misfeed in duplexer

(ADU)

13 Call for service Some part of the mechanism, motors,

14 Time for maintenance Indication of PM cycle

Paper jammed in the machine Remove the paper jammed in the

Original jammed

• An original is jammed in the ADF

Paper jammed in the ADU Remove the paper jammed in the

switches or sensors is abnormal

• Displayed when it is time for preventive maintenance and inspection

• Capable of copying

• Copy quantity indicator shows "1"When a digital key is pressed, that number indicates the set quantity

• The set quantity can be cleared to "1" by pressing the CLEAR/ STOP key

• Bypass copying is possible

• After completion of copying, the copy quantity indicator returns to the initially set number

except the ENERGY SAVER key

• Supply paper to the selected cassette

• Select another cassette

• Reset after the toner is supplied and the front cover is closed

The machine returns to normal conditions automatically when the paper out is pulled from the bypass tray

copier by following the messages Open the ADF jam access cover and

the ADF unit, and remove the jammed original

copier by following the message Turn OFF the machine, remove the

cause of the fault and turn the machine back ON

Maintenance and inspection by a qualified service technician

5 - 3

CONTROL PANEL

Page 90

5.3 Relation between Equipment State and Operation

[START] [CLEAR

/STOP]

Waiting Starts

Warming upReserve

Copying --- Pauses

Pausing copy job

Downloadi ng firmware In energy saving (low power) mode

In sleep mode

Interrupting copy job

Cover open --- Clears

Toner empty

Paper jam --- --- --- --- --- --- --- --- --- --Service call --- --- --- --- --- --- --- --- --- ---

copying

s auto start job

Resume s copy job

--- --- --- --- --- --- --- --- --- ---

--- --- --- --- Enters

Enters into waiting state

Starts interrupt ing copy

--- --- --- --- --- --- --- --- --- Operati

Clears copy quantity

copy job

Cancels copy job

Enters into waiting state

Clears copy quantity

copy quantity

[FUNCT ION CLEAR] Clears each setting

Clears each setting

--- Enters

Clears each setting

Enters into waiting state

Cancels interrupt ing copy

Clears each setting

[INTER RUPT]

Enters into interrupt ing copy

--- --- --- --- --- --- Operati

into interrupt ing copy Enters into interrupt ing copy

Enters into waiting state

Cancels interrupt ing copy

--- --- --- --- --- --- Operati

[ENER GY SAVER] Enters into energy saving mode or sleep mode

--- --- Enters

into waiting state

--- Enters

--- --- Enters

[COPY] [PRINT]

--- Enters

Enters into waiting state

into waiting state

into print job list screen

Enters into print job list screen Enters into print job list screen

into print job list screen

[SCAN]*2[FAX]*3Other

buttons/

keys Enters into SCAN screen

--- --- ---

Enters into SCAN screen

--- --- Operati

Enters into FAX screen

Operati

accepta

ble

accepta

ble

---

Enters

into

waiting

state

accepta

ble

accepta

ble

accepta

ble

Note:

*1 [PRINTER] button: This button is enabled when GA-1191 is installed and disabled when it is

not installed.

*2 [SCAN] button: This button is enabled when GA-1191 and GA-1201 are installed, and

disabled when they are not installed.

*3 [FAX] button: This button is enabled when GD-1221 is installed and disabled when it is

not installed.

5 - 4

Page 91

5.4 Operation

5.4.1 Block diagram

The control panel which mainly consists of the panel controlling ASIC and LED driver transmits/ receives the control signal to/from the SoC on the MAIN board, controls the LCD, detects the key pressed, and controls the ON/OFF of the LED and buzzer. The LCD is controlled by the signal output from the panel controlling ASIC based on the information output from the SoC via the control panel data bus. The input status of each button is output to the SoC via the data bus by the panel controlling ASIC and detected. Each LED is controlled to be lit by the LED driver based on the information of the serial data output from the SoC. The buzzer is controlled by the buzzer ON signal (BZON) output from the ASIC on the MAIN board.

5 - 5

CONTROL PANEL

Page 92

5.4.2 LED display circuit

<Example> Lighting circuit method of “TEXT/PHOTO lamp”

+5V

TEXT/PHOTO lamp

LEDM24

Low

(LED27)

Low

Fig. 5-5

Current

FET (Q1) is turned ON when the FET control signal (C0) becomes “L” level. Then when the control signal (LEDM24) of the LED driver changes to “L” level, the current flows to the cover open lamp (LED27) to turn ON the LED.

Conditions to turn ON the LED

The LED is turned ON only when the two conditions below are met.

1. The FET connected to the LED anode is ON.

2. The cathode side of the LED is “L” level.

5 - 6

Page 93

5.5 Disassembly and Replacement

5.5.1 Control panel unit

(1) Remove 3 screws.

Fig. 5-6

(2) Take off the control panel unit while lifting it

up.

(3) Disconnect 2 connector.

Note:

When installing the control panel unit, be sure not to have the harness being caught by the front right cover and the unit.

5.5.2 Control panel PC board (HPNL)

(1) Take off the control panel unit.

 P.5-7 "5.5.1 Control panel unit"

(2) Remove 2 screws and take off the cover

while sliding it.

Connector

Control panel unit

Fig. 5-7

Cover

Fig. 5-8

5 - 7

CONTROL PANEL

Page 94

(3) Take off 2 brackets by removing 2 screws

each.

(4) Remove 11 screws, disconnect 1 connector,

and then take off the control panel PC board.

Bracket

Fig. 5-9

Control panel PC board

Connector

5.5.3 LCD PC board (LCD)

(1) Take off the control panel pc board.

 P.5-7 "5.5.2 Control panel PC board (HPNL)"

(2) Remove 2 screws and take off the LCD PC

board.

Fig. 5-10

LCD PC board

Fig. 5-11

5 - 8

Page 95

6. SCANNER

6.1 General Description

In the scanning section, this equipment uses a CIS (Contact Image Sensor) for scanning the image. The surface of an original is irradiated with light from the LED array mounted on the CIS unit and the reflected light is scanned by the CCD where the optical image data are converted into an analog electrical signal, and then transmitted to the MAIN board. After the binarization and the various image processing operations necessary for image formation are performed on the MAIN board, the data are transmitted to the writing section.

ADF original glass

Automatic original detection sensor

CIS home position sensor

CIS unit

Damp heater

Original glass

Scan motor

Automatic original detection sensor

CIS home position sensor

Damp heater

Automatic original detection sensor

ADF original glass

CIS unit

Original glass

Scan motor

Damp heater

Automatic original detection sensor

Damp heater

LT seriesA4 series

Fig. 6-1

6 - 1

SCANNER

Page 96

6.2 Construction

Scanning section

Original glass Original glass

ADF Original glass

CIS unit (CIS) CCD

YG-LED array

RGB light guiding tube

Rod-lens array

Drive section Scan motor (M1)

Automatic original detection sensor (S9-S13)

CIS home position sensor (S1)

Others Damp heater (DH1, DH2)

6 - 2

Page 97

6.3 Functions

1. Original glass This is a glass for placing original. Original (image) placed on the original glass is scanned by the CIS. The ADF original glass is used when original is read with the Automatic Document Feeder. Original is transported on the ADF original glass by the Automatic Document Feeder, and the transported original is read under the ADF original glass by the CIS. Do not use such solvents as alcohol when cleaning the surface of the ADF original glass, because it is coated so as not to be scratched by originals.

2. CIS unit (CIS) The CIS unit (CIS) is a sensor unit which consists of an LED array, lens array and CCD sensor array of the same length as that of the original width in the primary scanning direction closely attached and unified. The original is irradiated at one time with the LED light source which consists of LEDs of RGB colors (one for each color), light guiding tube to lead each light to the original and a YG-LED array, and then the reflected light is scanned by the CCD sensor. In the CCD method (reduction optical method), the reflected light of the exposure lamp is LED through mirrors, lens and slit to the CCD where the optical-to-electrical conversion for scanned data is performed. In contrast, in the CIS method (close-contact sensor method), those operations are processed only by the CIS unit. The CIS has characteristics of shallow depth of focus and high lightsensitivity.

Micro-lens array

ADF original glass

Shading correction plate

CIS unit

RGB light guiding tubeYG-LED array CCD

Fig. 6-2

Original glass

-CCD

Scans the light reflected from an original and converts it to an electrical signal. In order to realize the same-to-scale optical system of A3 width and 7084 image pixels, the equipment uses 11 CCDs (each CCD has 644 image pixels per line) to make up a CIS sensor of 600x600 dpi resolution for scanning.

- YG-LED array

Works as an assistant light for the RGB light guiding tube. This YG-LED array is used to reduce the shadow of the original when scanning is performed.This LED array produces the output power of 7.68W.

6 - 3

SCANNER

Page 98

- RGB light guiding tube

A light from the LED array mounted on the CIS unit (CIS) goes through the original glass and lights the original. Then, the reflected light from the original is scanned by the CCD. By adjusting each amount of R, B and YG-LED light with reference to the amount of G-LED light, it is possible to attain a light color which has nearly the same color effect as that of the YG xenon light for the light sensitivity of the CCD sensor. This LED array produces the output power of 0.125W X 3.

3. Scan motor (M1) This is a two-phase stepping motor which drives the CIS unit (CIS). The rotation of the motor is transmitted to the CIS unit through the timing belt to move the unit in the secondary scanning direction.

4. CIS home position sensor (S1) This sensor detects if the CIS unit is at its home position.

5. Automatic original detection sensor (S9-S13) The size of an original placed on the glass is instantly detected using the APS sensors fixed on the base frame.

6 - 4

Page 99

6.4 Description of Operation

6.4.1 Scanning operation

• Scanning an original on the original glass The rotation of the scan motor (M1) is transmitted to the CIS unit through the timing belt to move the unit to the home position. The home position is detected when the actuator installed on the CIS case passes the CIS home position sensor (S1).

When the [START] button is pressed, the CIS unit starts scanning the original.

• Scanning an original on the ADF/RADF The CIS unit (CIS) stops and stays at the shading position during the shading correction, and at the scanning position during the scanning operation.

6 - 5

SCANNER

Page 100

6.4.2 Scan motor drive circuit

The scan motor (M1) is a 2-phase stepping motor and is driven by the motor driver (IC2).

+24V+5V

VDD

+5V

ASIC

IC23

SoC

GND

Excitation mode setting-2 (Fixed at "H")

SCNMD0: Excitation mode Setting-1

SCANRST: Resetting

SCNDIR: Motor rotation direction setting

SCNEN: Cutting off of the drive output

SCNCLK: Clock input

VSS

MODE2

MODE1

RESETB

CWB

ENABLE

CLOCK

IC53

MAIN board

SCNMVR: Voltage to set value for the motor current

GND

Fig. 6-3

VREF

PG1

PG2

Driver IC

IC2

6 - 6

Toshiba e-STUDIO 182, E-studio 212, E-studio 242 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

1. SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES

1.1 Specifications

1.2 Accessories

1.3 Options

1.4 Supplies

1.5 System List

2. OUTLINE OF THE MACHINE

2.1 Sectional View

2.2 Electric Parts Layout

2.3 Symbols and Functions of Various Components

2.4 General Description

2.4.1 System block diagram

2.4.2 Construction of boards

2.5 Disassembly and Replacement of Covers

2.5.1 Front cover

2.5.2 Inner tray

2.5.3 Left cover

2.5.4 Tray rear cover

2.5.5 Front right cover

2.5.6 Front upper cover

2.5.7 ADU cover

2.5.8 Right front cover

2.5.9 Right rear cover

2.5.10 Rear cover

2.6 Disassembly and Replacement of PC boards

2.6.1 MAIN board (MAIN)

2.6.2 SRAM board (SRAM)

2.6.3 Fuse PC board (FUS)

2.6.4 Paper feed controller PC board (PFC)

2.6.5 Switching regulator unit (PS)

2.6.6 Switching regulator cooling fan (M6)

2.7 Removal and Installation of Options

2.7.1 MR-2020 (Automatic Document Feeder (ADF))/MR-3023 (Reversing Automatic Document Feeder (RADF))

2.7.2 MY-1027 (Paper Feed Unit (PFU))

2.7.3 KD-1022 (Paper Feed Pedestal (PFP))

3. COPY PROCESS

3.1 General Description of Copying Process

3.2 Details of Copying Process

3.3 Comparison with e-STUDIO230/280

4. GENERAL OPERATION

4.1 Overview of Operation

4.2 Description of Operation

4.2.1 Warming-up

4.2.2 Ready state (ready for copying)

4.2.3 Drawer feed copying

4.2.4 Bypass feed copying

4.2.5 Interruption copying

4.3 Detection of Abnormality

4.3.1 Types of abnormality

4.3.2 Description of abnormality

5. CONTROL PANEL

5.1 General Description

5.2 Items Shown on the Display Panel

5.2.1 Display

5.2.2 Message

5.3 Relation between Equipment State and Operation

5.4 Operation

5.4.1 Block diagram

5.4.2 LED display circuit

5.5 Disassembly and Replacement

5.5.1 Control panel unit

5.5.2 Control panel PC board (HPNL)

5.5.3 LCD PC board (LCD)

6. SCANNER

6.1 General Description

6.2 Construction

6.3 Functions

6.4 Description of Operation

6.4.1 Scanning operation

6.4.2 Scan motor drive circuit