Toshiba E-STUDIO2006 User manual

SERVICE MANUAL
MULTIFUNCTIONAL DIGITAL SYSTEMS
e-STUDIO2006/2306/2506
e-STUDIO2007/2307/2507
e-STUDIO2303A/2303AM/2803AM
e-STUDIO2309A/2809A
Model: DP-2006/2306/2506/2007/2307/2507
DP-2303A/2303AM/2803AM/2309A/2809A
Publish Date: June 2013
File No. SME120051L0
R120621M1612-TTEC
Ver12 F_2017-08

Trademarks
• The official name of Windows Vista®is Microsoft Windows Vista Operating System.
• The official name of Windows®7 is Microsoft Windows 7 Operating System.
• The official name of Windows®8.1 is Microsoft Windows 8.1 Operating System.
• The official name of Windows®10 is Microsoft Windows 10 Operating System.
• The official name of Windows Server®2003 is Microsoft Windows Server 2003 Operating System.
• The official name of Windows Server®2008 is Microsoft Windows Server 2008 Operating System.
• The official name of Windows Server®2012 is Microsoft Windows Server 2012 Operating System.
• The official name of Windows Server®2016 is Microsoft Windows Server 2016 Operating System.
• Microsoft, Windows, Windows NT, and the brand names and product names of other Microsoft
products are trademarks of Microsoft Corporation in the US and other countries.
• Apple, AppleTalk, Macintosh, Mac, Mac OS, Safari, iPhone, iPod touch, TrueType, AirPrint, AirPrint
logo, and iPad are trademarks of Apple Inc.
• Adobe®, Acrobat®, Reader, and PostScript®are trademarks or registered trademarks of Adobe
Systems Incorporated.
• e-STUDIO, and TopAccess are trademarks of Toshiba Tec Corporation.
• 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 registered trademark of Kanto Kasei Ltd. CORPORATION.
• Other company names and product names in this manual are the trademarks of their respective
companies.
© 2013-2017 TOSHIBA TEC CORPORATION All rights reserved
Under the copyright laws, this manual cannot be reproduced in any form without prior written permission
of TOSHIBA TEC CORPORATION.

GENERAL PRECAUTIONS REGARDING THE SERVICE FOR
THIS EQUIPMENT
The installation and service shall be done by a qualified service
technician.
1. Transportation/Installation
- When transporting/installing the equipment, employ at least two persons, take off the drawer
from it and be sure to hold the positions as shown in the figure. The equipment is quite heavy
and weighs approximately 28.5 kg (62.83 lb.), therefore pay full attention when handling it.
* To ensure the space to hold the equipment securely, take off the drawer as shown in the figures
(A) and (B).
- Be sure not to hold the movable parts or units (e.g. the ADU or RADF) when transporting the
equipment.
- Be sure to use a dedicated outlet with AC 120 V / 12 A, 220-240 V / 8A for its power source.
- The equipment must be grounded for safety.
- Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration and
direct sunlight.
- Provide proper ventilation since the equipment emits a slight amount of ozone.
- To insure adequate working space for the copying operation, keep a minimum clearance of 80
cm (32”) on the left, 80 cm (32”) on the right and 10 cm (4”) on the rear.
- The equipment shall be installed near the socket outlet and shall be accessible.
- Be sure to fix and plug in the power cable securely after the installation so that no one trips over
it.
- 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.
(B)(A)

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.
- The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband
since the ICs on it may be damaged due to static electricity.
- Avoid expose to laser beam during service. This equipment uses a laser diode. Be sure not to
expose your eyes to the laser beam. Do not insert reflecting parts or tools such as a screwdriver
on the laser beam path. Remove all reflecting metals such as watches, rings, etc. before starting
service.
- Be sure not to touch high-temperature sections such as the fuser unit, damp heater and areas
around them.
- Be sure not to touch high-voltage sections such as the chargers, transfer roller, developer, high-
voltage transformer 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.
- Do not leave plastic bags where children can get at them. This may cause an accident such as
suffocation if a child puts his/her head into a bag. Plastic bags of options or service parts must be
brought back.
- There is a risk of an electric shock or fire resulting from the damage to the harness covering or
conduction blockage. To avoid this, be sure to wire the harness in the same way as that before
disassembling when the equipment is assembled/disassembled.
3. General operations
- Check the procedures and perform them as described in the Service Manual.
- Make sure you do not lose your balance.
- Avoid exposure to your skin and wear protective gloves as needed.
4. 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 explosion or burnout. Do not allow a short-circuit and do not use the parts not
recommended by Toshiba TEC Corporation.
Caution: Before using the wristband, unplug the power cable of the equipment and
make sure that there are no charged objects which are not insulated in the
vicinity.

5. 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.
[1] Cautionary label for laser unit
[2] Warning for high temperature area (fuser unit)
[3] Explanatory label
[4] Identification label
[5] Service label
[1]
[1] [5]
[3]
[4]
[2]

6. Disposal of the Equipment, Supplies, Packing Materials, Used Batteries and IC-RAMs
including lithium batteries
- Regarding the recovery and disposal of the equipment, supplies, packing materials, used
batteries and IC-RAMs including lithium batteries, follow the relevant local regulations or rules.
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.

ALLGEMEINE SICHERHEITSMASSNAHMEN FÜR DIESES
GERÄT
Die Installation und die Wartung sind von einem qualifizierten Service-
Techniker durchzuführen.
1. Transport/Installation
- Zum Transportieren/Installieren des Systems mit 2 Personen arbeiten, die Kassette entfernen
und das System nur an den abgebildeten Stellen halten. Das System ist relativ schwer und wiegt
etwa 28.5 kg, daher behutsam vorgehen.
* Damit genug Platz zum sicheren Halten des Systems geschaffen wird, muss die Kassette
gemäß gemas den Abb. (A) und (B) entfernt werden.
- Beim Transportieren des Geräts nicht an den beweglichen Teilen oder Einheiten (z.B. die
Duplexeinheit oder die automatische Dokumentenzuführung) halten.
- Eine spezielle Steckdose mit Stromversorgung von AC 120 V / 12 A, 220-240 V / 8A als
Stromquelle verwenden.
- Das Gerät ist aus Sicherheitsgründen zu erden.
- Einen geeigneten Standort für die Installation wählen. Standorte mit zuviel Hitze, hoher
Luftfeuchtigkeit, 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
niemand darüber stolpern kann.
- Falls der Auspackungsstandort und der Installationsstandort des Geräts verschieden sind, die
Bildqualitätsjustierung (automatische Gammajustierung) je nach der Temperatur und
Luftfeuchtigkeit des Installationsstandorts und der Papiersorte, die verwendet wird, durchführen.
(B)(A)

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
Umgebung 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.
- Das PC-Board muss in einer Anti-elektrostatischen Hülle gelagert werden. Nur Mit einer
Manschette bei Betätigung eines Armbandes anfassen, sonst könnte es sein, dass die
integrierten Schaltkreise durch statische Elektrizität beschädigt werden.
- 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 Fixiereinheit, die Heizquelle und die
umliegenden Bereiche, berühren.
- Auf keinen Fall Hochspannungsbereiche, wie die Ladeeinheiten, die Transferwalze, 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
Bereiche, 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
Komponenten 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.
- Bewahren Sie Kunststofftüten kindersicher auf. Es besteht Erstickungsgefahr, wenn sich Kinder
beim Spielen eine Kunststofftüte über den Kopf ziehen. Bitte nehmen Sie die Kunststofftüten von
Optionen oder Serviceparts wieder zurück.
- Wenn der Schutzmantel eines Kabels oder die Steckerisolierung beschädigt werden, besteht
Brandgefahr oder die Gefahr eines elektrischen Schlags. Um dies zu vermeiden, sollten Kabel in
der gleichen Weise verlegt werden, wie sie vor der Demontage/dem Transport verlegt waren.
3. Allgemeine Sicherheïtsmassnahmen
- Die Verfahren sind zu überprüfen und wie im Wartungshandbuch beschrieben durchzuführen.
- Vorsichtig, dass Sie nicht umfallen.
- Um Aussetzung zur Haut zur vermeiden, tragen Sie wenn nötig Schutzhandschuhe.
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.

4. Sicherheitsrelevante Wartungsteile
- Der Leistungsschutzschalter, der Türschalter, die Sicherung, der Thermostat, die
Thermosicherung, der Thermistor, der Akkus, 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, einer Explosion oder wie einem Abbrand, führen. Kurzschlüsse sind
zu vermeiden, und es sind ausschließlich Teile zu verwenden, die von der Toshiba TEC
Corporation empfohlen sind.

5. 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.
[1] Laser-Warnetikett
[2] Warnung fur Bereiche mit hohen Temperaturen (Fixiereinheit)
[3] Erklarungsetikett
[4] Erkennungsetikett
[5] Dienstaufschrift
[1]
[1] [5]
[3]
[4]
[2]

6. Entsorgung des Geräts, der Verbrauchs- und Verpackungsmaterialien, alter Akkus und IC-
RAMs
- In Bezug auf die Entsorgung und Wiederverwertung des Geräts, der Verbrauchs- und
Verpackungsmaterialien, 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.

• 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 (LDRS) 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 Laserwarnetikett ist am Gehäuse sichtbar, wenn die Abdeckung auf der rechten Seite
und die Tonerzufuhrabdeckung geöffnet sind.

Das folgende Laserwarnetikett befindet sich auf der optischen Lasereinheit.
• 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
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.

© 2013-2017 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
CONTENTS
1
CONTENTS
1. FEATURES ................................................................................................................... 1-1
1.1 Main Feature of 20L/23L/25L ............................................................................................ 1-1
1.2 Main Feature of 20H/23H/25H .......................................................................................... 1-1
1.3 Main Feature of 23LA/23LM/28LM/23HA/28HA................................................................ 1-1
2. SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES ................................... 2-1
2.1 Specifications .................................................................................................................... 2-1
2.1.1 General .............................................................................................................. 2-1
2.1.2 Copy .................................................................................................................. 2-5
2.1.3 Print ................................................................................................................... 2-8
2.1.4 Scan................................................................................................................... 2-8
2.2 Accessories....................................................................................................................... 2-9
2.3 Options............................................................................................................................ 2-10
2.4 System List...................................................................................................................... 2-11
2.4.1 <20L/23L/25L>................................................................................................. 2-11
2.4.2 <20H/23H/25H>............................................................................................... 2-12
2.4.3 <23LA/23LM/28LM> ........................................................................................ 2-13
2.4.4 <23HA/28HA>.................................................................................................. 2-14
2.5 Supplies .......................................................................................................................... 2-15
3. OUTLINE OF THE MACHINE ....................................................................................... 3-1
3.1 Sectional View................................................................................................................... 3-1
3.2 Electric Parts Layout ......................................................................................................... 3-5
3.3 Symbols and Functions of Various Components ............................................................ 3-14
3.3.1 Motors.............................................................................................................. 3-14
3.3.2 Sensors and switches ...................................................................................... 3-14
3.3.3 Electromagnetic clutches ................................................................................. 3-15
3.3.4 PC boards........................................................................................................ 3-15
3.3.5 Lamps and heaters .......................................................................................... 3-16
3.3.6 Thermistors and thermostats ........................................................................... 3-16
3.3.7 Others .............................................................................................................. 3-17
3.4 Copy Process.................................................................................................................. 3-18
3.4.1 General Description of Copying Process......................................................... 3-18
3.5 Comparison with e-STUDIO195 series ........................................................................... 3-19
3.6 General Operation........................................................................................................... 3-21
3.6.1 Overview of Operation ..................................................................................... 3-21
3.6.2 Description of Operation .................................................................................. 3-22
3.6.3 Detection of Abnormality.................................................................................. 3-25
3.7 Control Panel .................................................................................................................. 3-28
3.7.1 General Description ......................................................................................... 3-28
3.7.2 Items shown on the display panel.................................................................... 3-32
3.8 Scanner........................................................................................................................... 3-33
3.8.1 General Description ......................................................................................... 3-33
3.8.2 Composition..................................................................................................... 3-34
3.8.3 Functions ......................................................................................................... 3-35
3.8.4 Description of Operation .................................................................................. 3-37
3.9 Laser Optical Unit............................................................................................................ 3-38
3.9.1 General Description ......................................................................................... 3-38
3.9.2 Laser precautions ............................................................................................ 3-39
3.10 Drive System................................................................................................................... 3-41
3.10.1 General Description ......................................................................................... 3-41
3.10.2 Composition..................................................................................................... 3-42
3.10.3 Functions ......................................................................................................... 3-42
3.11 Paper Feeding System.................................................................................................... 3-43
3.11.1 General Descriptions ....................................................................................... 3-43
3.11.2 Composition..................................................................................................... 3-44

e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A © 2013-2017 TOSHIBA TEC CORPORATION All rights reserved
CONTENTS
2
3.11.3 Functions ......................................................................................................... 3-45
3.11.4 Operation ......................................................................................................... 3-46
3.12 Drum Related Section ..................................................................................................... 3-51
3.12.1 Configuration ................................................................................................... 3-51
3.12.2 Composition..................................................................................................... 3-52
3.12.3 Functions ......................................................................................................... 3-53
3.13 Development System ...................................................................................................... 3-55
3.13.1 Configuration ................................................................................................... 3-55
3.13.2 Composition..................................................................................................... 3-56
3.13.3 Functions ......................................................................................................... 3-57
3.14 Fuser / Exit Unit............................................................................................................... 3-61
3.14.1 General Description ......................................................................................... 3-61
3.14.2 Composition..................................................................................................... 3-62
3.14.3 Functions ......................................................................................................... 3-63
3.14.4 Operation ......................................................................................................... 3-64
3.14.5 Heater Control Circuit ...................................................................................... 3-65
3.15 Automatic Duplexing Unit................................................................................................ 3-70
3.15.1 General Description ......................................................................................... 3-70
3.15.2 Composition..................................................................................................... 3-71
3.15.3 Drive of ADU.................................................................................................... 3-72
3.15.4 Functions ......................................................................................................... 3-73
3.15.5 Description of Operations ................................................................................ 3-74
3.16 Power Supply Unit...........................................................................................................3-76
3.16.1 Composition..................................................................................................... 3-76
3.16.2 Operation of DC Output Circuits ...................................................................... 3-77
3.16.3 Output Channel................................................................................................ 3-78
4. DISASSEMBLY AND REPLACEMENT........................................................................ 4-1
4.1 Disassembly and Replacement of Covers ........................................................................ 4-1
4.1.1 Left cover <20L/23L/25L/20H/23H/25H> ........................................................... 4-1
4.1.2 Left cover <23LA/23LM/28LM/23HA/28HA> ..................................................... 4-1
4.1.3 Inner tray............................................................................................................ 4-2
4.1.4 Right front cover ................................................................................................ 4-2
4.1.5 Left front cover................................................................................................... 4-3
4.1.6 Toner supply cover ............................................................................................ 4-4
4.1.7 Tray front cover.................................................................................................. 4-4
4.1.8 Tray rear cover .................................................................................................. 4-4
4.1.9 Rear cover <20L/23L/25L/20H/23H/25H> ......................................................... 4-5
4.1.10 Rear cover <23LA/23LM/28LM/23HA/28HA>.................................................... 4-6
4.1.11 Right rear cover ................................................................................................. 4-7
4.1.12 Right lower cover ............................................................................................... 4-7
4.1.13 Right cover......................................................................................................... 4-8
4.1.14 Top cover........................................................................................................... 4-9
4.2 Control Panel .................................................................................................................. 4-10
4.2.1 Control panel unit............................................................................................. 4-10
4.2.2 Control panel PC board (HPNL) ...................................................................... 4-11
4.2.3 LED panel ........................................................................................................ 4-11
4.2.4 USB cable <20L/23L/25L/20H/23H/25H>........................................................ 4-12
4.2.5 USB cable <23LA/23LM/28LM/23HA/28HA> .................................................. 4-13
4.3 Scanner........................................................................................................................... 4-15
4.3.1 Original glass ................................................................................................... 4-15
4.3.2 Contact Image Sensor unit (CIS)..................................................................... 4-15
4.3.3 CIS case .......................................................................................................... 4-18
4.3.4 CIS case <23LA/23LM/28LM/23HA/28HA>..................................................... 4-19
4.3.5 Scan motor (M1) <20L/23L/25L/20H/23H/25H> .............................................. 4-21
4.3.6 Scan motor (M1) <23LA/23LM/28LM/23HA/28HA> ........................................ 4-24
4.3.7 Platen sensor (S7) <20H/23H/25H, 23HA/28HA only> ................................... 4-26
4.3.8 Automatic original detection sensor-1 (S9) / Automatic original
detection sensor-2 (S10) <20H/23H/25H, 23HA/28HA only> .......................... 4-27

© 2013-2017 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
CONTENTS
3
4.4 Laser Optical Unit............................................................................................................ 4-28
4.4.1 Laser optical unit.............................................................................................. 4-28
4.5 Drive System................................................................................................................... 4-30
4.5.1 Main motor (M3) .............................................................................................. 4-30
4.5.2 Toner motor (M2)............................................................................................. 4-30
4.5.3 Paper eject unit................................................................................................ 4-31
4.5.4 Upper drive unit ............................................................................................... 4-31
4.5.5 Lower drive unit ............................................................................................... 4-32
4.6 Paper Feeding System.................................................................................................... 4-33
4.6.1 Bypass unit ...................................................................................................... 4-33
4.6.2 Bypass feed clutch (CLT3) .............................................................................. 4-34
4.6.3 Duct unit........................................................................................................... 4-35
4.6.4 Lower bypass feed guide................................................................................. 4-36
4.6.5 Bypass feed roller <20L/23L/25L/20H/23H/25H> ............................................ 4-36
4.6.6 Bypass feed roller <23LA/23LM/28LM/23HA/28HA> ...................................... 4-37
4.6.7 Bypass separation pad <20L/23L/25L/20H/23H/25H> .................................... 4-39
4.6.8 Bypass paper sensor (S6) ............................................................................... 4-39
4.6.9 Drawer feed roller <20L/23L/25L/20H/23H/25H> .......................................... 4-40
4.6.10 Drawer feed roller <23LA/23LM/28LM/23HA/28HA> ..................................... 4-41
4.6.11 Drawer separation pad ................................................................................... 4-42
4.6.12 Drawer feed clutch (CLT2)............................................................................... 4-42
4.6.13 Registration roller clutch (CLT1) ...................................................................... 4-43
4.6.14 Registration roller (metal) ................................................................................ 4-44
4.6.15 Registration roller (rubber)............................................................................... 4-45
4.6.16 Registration sensor (S2) .................................................................................. 4-46
4.6.17 Paper empty sensor (S5) ................................................................................. 4-47
4.7 Process Related Section................................................................................................. 4-49
4.7.1 Process unit <20L/23L/25L/20H/23H/25H> ..................................................... 4-49
4.7.2 Process unit <23LA/23LM/28LM/23HA/28HA> ............................................... 4-50
4.7.3 Drum cleaner unit ............................................................................................ 4-51
4.7.4 Drum ............................................................................................................... 4-52
4.7.5 Drum cleaning blade ....................................................................................... 4-52
4.7.6 Recovery Blade ............................................................................................... 4-53
4.7.7 Drum separation finger .................................................................................... 4-53
4.7.8 Main charger.................................................................................................... 4-54
4.7.9 Main charger grid ............................................................................................ 4-54
4.7.10 Main charger cleaner ....................................................................................... 4-55
4.7.11 Needle electrode.............................................................................................. 4-55
4.7.12 Transfer roller ................................................................................................. 4-55
4.7.13 Separation needle............................................................................................ 4-56
4.7.14 Ozone filter ...................................................................................................... 4-56
4.7.15 Suction fun (M5) .............................................................................................. 4-57
4.7.16 Temperature/humidity sensor (S1) <20L/23L/25L/20H/23H/25H> .................. 4-57
4.7.17 Temperature/humidity sensor (S1) <23LA/23LM/28LM/23HA/28HA>............. 4-57
4.7.18 Developer unit.................................................................................................. 4-59
4.7.19 Removing developer material .......................................................................... 4-59
4.7.20 Filling developer unit with developer material ................................................. 4-61
4.7.21 Auto-toner sensor (S4) .................................................................................... 4-61
4.7.22 Doctor blade <20L/23L/25L/20H/23H/25H> .................................................... 4-61
4.7.23 Doctor blade <23LA/23LM/28LM/23HA/28HA> ............................................... 4-62
4.7.24 Mixer <20L/23L/25L/20H/23H/25H> ................................................................ 4-62
4.7.25 Mixer <23LA/23LM/28LM/23HA/28HA> .......................................................... 4-64
4.7.26 Replacement of oil seal <20L/23L/25L/20H/23H/25H> ................................... 4-66
4.7.27 Oil seal (front side) <23LA/23LM/28LM/23HA/28HA> ..................................... 4-66
4.7.28 Developer sleeve <20L/23L/25L/20H/23H/25H> ............................................. 4-68
4.7.29 Developer sleeve <23LA/23LM/28LM/23HA/28HA> ....................................... 4-70
4.7.30 Toner cartridge interface PC board (CTIF) ...................................................... 4-73
4.8 Fuser/Exit Unit <20L/23L/25L/20H/23H/25H>................................................................. 4-74

e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A © 2013-2017 TOSHIBA TEC CORPORATION All rights reserved
CONTENTS
4
4.8.1 Fuser unit......................................................................................................... 4-77
4.8.2 Fuser unit cover/Fuser unit guide .................................................................... 4-78
4.8.3 Center heater lamp (LAMP1) .......................................................................... 4-80
4.8.4 Side heater lamp (LAMP2) .............................................................................. 4-81
4.8.5 Base unit.......................................................................................................... 4-82
4.8.6 Separation finger ............................................................................................. 4-83
4.8.7 Pressure roller ................................................................................................. 4-84
4.8.8 Fuser roller/Fuser roller bushing...................................................................... 4-85
4.8.9 Fuser center thermostat (THMO1) / Fuser front thermostat (THMO2) ............ 4-87
4.8.10 Center thermistor (THMS1) / Side thermistor (THMS2) /
Edge thermistor (THMS3) ................................................................................ 4-88
4.8.11 Exit sensor (S3) ............................................................................................... 4-91
4.8.12 Exit roller .......................................................................................................... 4-92
4.9 Fuser/Exit Unit <23LA/23LM/28LM/23HA/28HA> ........................................................... 4-94
4.9.1 Fuser unit......................................................................................................... 4-97
4.9.2 Exit sensor (S3) ............................................................................................... 4-98
4.9.3 Fuser unit cover/Fuser unit guide .................................................................. 4-100
4.9.4 Center heater lamp (LAMP1) ........................................................................ 4-103
4.9.5 Side heater lamp (LAMP2) ............................................................................ 4-104
4.9.6 Base unit........................................................................................................ 4-105
4.9.7 Pressure roller ............................................................................................... 4-106
4.9.8 Separation finger ........................................................................................... 4-107
4.9.9 Fuser roller/Fuser roller bushing.................................................................... 4-108
4.9.10 Fuser center thermostat (THMO1) / Fuser front thermostat (THMO2) .......... 4-109
4.9.11 Center thermistor (THMS1) / Side thermistor (THMS2) /
Edge thermistor (THMS3) .............................................................................. 4-111
4.9.12 Exit roller ........................................................................................................ 4-113
4.10 Automatic duplexing unit (ADU): Option <20L/23L/25L/20H/23H/25H> ....................... 4-116
4.10.1 Automatic duplexing unit (ADU)..................................................................... 4-116
4.10.2 ADU sensor (S8)............................................................................................ 4-117
4.10.3 Fuser guide unit ............................................................................................. 4-117
4.10.4 Paper exit motor (M6) .................................................................................... 4-118
4.10.5 ADU clutch (CLT4)......................................................................................... 4-119
4.10.6 ADU fan duct unit........................................................................................... 4-120
4.10.7 ADU lower transport roller ............................................................................. 4-120
4.10.8 ADU upper transport roller............................................................................. 4-121
4.10.9 ADU transport roller ....................................................................................... 4-122
4.11 Automatic duplexing unit (ADU): <23LA/23LM/28LM/23HA/28HA> ............................. 4-123
4.11.1 Automatic duplexing unit (ADU)..................................................................... 4-123
4.11.2 ADU sensor (S8)............................................................................................ 4-124
4.11.3 Fuser guide unit ............................................................................................. 4-124
4.11.4 Paper exit motor (M6) .................................................................................... 4-125
4.11.5 ADU clutch (CLT4)......................................................................................... 4-126
4.11.6 ADU fan duct unit........................................................................................... 4-126
4.11.7 ADU lower transport roller ............................................................................. 4-127
4.11.8 ADU upper transport roller............................................................................. 4-128
4.11.9 ADU transport roller ....................................................................................... 4-128
4.12 Installation and Replacement of Options <20L/23L/25L/20H/23H/25H> ...................... 4-129
4.12.1 Reversing Auto Document Feeder (RADF) ................................................... 4-129
4.12.2 Paper feed unit (PFU).................................................................................... 4-130
4.13 Installation and Replacement of Options <23LA/23LM/28LM/23HA/28HA>................. 4-134
4.13.1 Reversing Auto Document Feeder (RADF) ................................................... 4-134
4.13.2 Paper feed unit (PFU).................................................................................... 4-135
5. SELF-DIAGNOSIS MODES .......................................................................................... 5-1
5.1 Overview ........................................................................................................................... 5-1
5.2 Input Check (Test Mode 03) ............................................................................................. 5-5
5.3 Output Check (Test Mode 03)........................................................................................... 5-6
5.4 Test Print Mode (Test Mode 04) ....................................................................................... 5-7

© 2013-2017 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
CONTENTS
5
5.5 Operation Procedure in Adjustment Mode (05)................................................................. 5-8
5.6 Test print pattern in Adjustment Mode (05)..................................................................... 5-10
5.7 Operation Procedure in Setting Mode (08) ..................................................................... 5-11
5.8 Assist Mode (3C).............................................................................................................5-13
5.8.1 Functions ......................................................................................................... 5-13
5.8.2 Operating Procedure of Assist Mode............................................................... 5-14
5.9 List Print Mode (9S) ........................................................................................................ 5-15
5.9.1 Operation procedure........................................................................................ 5-15
5.9.2 List printing ...................................................................................................... 5-16
5.10 Flash Memory Clear Mode (6C)...................................................................................... 5-29
5.10.1 General description.......................................................................................... 5-29
5.10.2 Operation procedure ........................................................................................ 5-29
5.10.3 Functions ......................................................................................................... 5-30
5.11 Flash Memory Backup/Restore Mode (59) ..................................................................... 5-31
5.11.1 General description.......................................................................................... 5-31
5.11.2 Backup files ..................................................................................................... 5-31
5.11.3 Backup procedure............................................................................................ 5-32
5.11.4 Restore procedure ........................................................................................... 5-32
5.12 PM support mode related code ....................................................................................... 5-34
5.12.1 Setting.............................................................................................................. 5-34
5.12.2 Restrictions for the PM counter-related self-diagnosis codes.......................... 5-37
6. SETTING / ADJUSTMENT............................................................................................ 6-1
6.1 Adjustment Order .............................................................................................................. 6-1
6.2 Adjustment of Auto-Toner Sensor..................................................................................... 6-2
6.3 Image Dimensional Adjustment ........................................................................................ 6-4
6.3.1 General description............................................................................................ 6-4
6.3.2 Light volume adjustment of scanner LED .......................................................... 6-5
6.3.3 Paper alignment at the registration roller........................................................... 6-6
6.3.4 Printer related adjustment.................................................................................. 6-8
6.3.5 Scanner related adjustment ............................................................................. 6-15
6.4 Image Quality Adjustment (Copying Function)................................................................ 6-23
6.4.1 Automatic gamma adjustment ......................................................................... 6-23
6.4.2 Density adjustment .......................................................................................... 6-24
6.4.3 Background adjustment ................................................................................... 6-25
6.4.4 Sharpness adjustment ..................................................................................... 6-25
6.4.5 Gamma balance adjustment ........................................................................... 6-26
6.4.6 Adjustment of image density............................................................................ 6-27
6.4.7 Background offsetting adjustment for RADF ................................................... 6-28
6.5 Image Quality Adjustment (Printing Function)................................................................. 6-29
6.5.1 Adjustment of image density............................................................................ 6-29
6.5.2 Gamma balance adjustment <20H/23H/25H, 23HA/28HA>............................ 6-30
6.6 Image Quality Adjustment (Scanning Function).............................................................. 6-31
6.6.1 Gamma balance adjustment............................................................................ 6-31
6.6.2 Density adjustment .......................................................................................... 6-32
6.6.3 Sharpness adjustment ..................................................................................... 6-33
6.6.4 Background adjustment ................................................................................... 6-34
6.6.5 Fine adjustment of black density ..................................................................... 6-35
6.6.6 RGB conversion method selection .................................................................. 6-35
6.6.7 Adjustment of saturation .................................................................................. 6-35
6.6.8 Background processing offset adjustment....................................................... 6-36
6.7 Adjustment of the Scanner Section................................................................................. 6-37
6.7.1 CIS unit ............................................................................................................ 6-37
6.7.2 Adjustment of Start Timing for Original Detection <23HA/28HA only> ............ 6-37
6.8 Adjustment of the Paper Feeding System....................................................................... 6-38
6.8.1 Sheet sideways deviation caused by paper feeding........................................ 6-38
6.9 Adjustment of Developer Unit <23LA/23LM/28LM/23HA/28HA>.................................... 6-39
6.9.1 Doctor-to-sleeve gap ....................................................................................... 6-39
6.10 Adjustment of the RADF ................................................................................................. 6-41

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CONTENTS
6
6.10.1 Tray volume adjustment .................................................................................. 6-41
6.10.2 Adjustment of Skew ......................................................................................... 6-42
6.10.3 Adjustment of the leading edge position.......................................................... 6-45
6.10.4 Adjustment of horizontal position ..................................................................... 6-47
6.10.5 Adjustment of copy ratio .................................................................................. 6-48
7. PREVENTIVE MAINTENANCE (PM)............................................................................ 7-1
7.1 General Description ..........................................................................................................7-1
7.2 PM Support Mode (6S) ..................................................................................................... 7-2
7.2.1 General description............................................................................................ 7-2
7.2.2 Operational flow and operational screen .......................................................... 7-2
7.3 EPU Mode ([FUNCTION CLEAR] + [START] Buttons)
<23LA/23LM/28LM/23HA/28HA Only> ............................................................................. 7-8
7.3.1 General description............................................................................................ 7-8
7.3.2 Operational flow ................................................................................................. 7-8
7.3.3 Counters to be cleared .................................................................................... 7-10
7.4 Preventive Maintenance Checklist .................................................................................. 7-11
7.4.1 Scanner ........................................................................................................... 7-12
7.4.2 Feed unit.......................................................................................................... 7-13
7.4.3 Bypass feed unit .............................................................................................. 7-15
7.4.4 Main charger.................................................................................................... 7-16
7.4.5 Transfer / Separation charger.......................................................................... 7-18
7.4.6 Drum/Cleaner related section .......................................................................... 7-19
7.4.7 Developer unit / Toner cartridge related section.............................................. 7-21
7.4.8 Fuser/Paper exit unit........................................................................................ 7-23
7.4.9 Automatic duplexing unit ................................................................................. 7-25
7.4.10 RADF ............................................................................................................... 7-26
7.4.11 PFU.................................................................................................................. 7-27
7.4.12 PFP.................................................................................................................. 7-28
7.5 PM KIT ............................................................................................................................ 7-29
7.6 Maintenance Part List ..................................................................................................... 7-30
7.7 Grease List...................................................................................................................... 7-31
7.8 Precautions for Storing and Handling Supplies............................................................... 7-32
7.8.1 Precautions for storing TOSHIBA supplies ...................................................... 7-32
7.8.2 Checking and cleaning of photoconductive drum ............................................ 7-33
7.8.3 Checking and cleaning of drum cleaning blade ............................................... 7-34
7.8.4 Checking and cleaning of fuser roller and pressure roller ............................... 7-34
7.8.5 Checking and replacing the transfer roller ....................................................... 7-35
7.9 Operational Items in Machine Refreshing ....................................................................... 7-36
8. ERROR CODE AND TROUBLESHOOTING ................................................................ 8-1
8.1 General Descriptions.........................................................................................................8-1
8.1.1 If a problem continues even after performing all troubleshooting. ..................... 8-2
8.1.2 Collection of debug logs with a USB device ..................................................... 8-3
8.1.3 Traceability label................................................................................................ 8-5
8.2 Error Code List .................................................................................................................. 8-7
8.2.1 Jam .................................................................................................................... 8-7
8.2.2 Service call ...................................................................................................... 8-10
8.2.3 Error in E-mail / Scanning Function ................................................................. 8-12
8.2.4 Error history ..................................................................................................... 8-13
8.3 Diagnosis and Prescription for Each Error Code ............................................................ 8-15
8.3.1 Check item....................................................................................................... 8-15
8.3.2 Paper exit jam .................................................................................................. 8-16
8.3.3 Paper transport jam ......................................................................................... 8-17
8.3.4 Paper misfeeding............................................................................................. 8-26
8.3.5 Cover open jam ............................................................................................... 8-33
8.3.6 Other jam ......................................................................................................... 8-38
8.3.7 RADF jam ........................................................................................................ 8-42
8.3.8 Drive system related service call ..................................................................... 8-44