Star Micronics WinType 4000 Technical Manual

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WinType 4000

ECHNICAL MANUAL

[ SECOND EDITION ]

LASER PRINTER

NOTICE

form whatsoever, without STAR’s express permission, is forbidden.

• The contents of this manual are subject to change without notice.

• All efforts have been made to ensure the accuracy of the contents

of this manual at the time of going to press. However, should any errors be detected, STAR would greatly appreciate being informed of them.

• The above notwithstanding, STAR can assume no responsibility

for any errors in this manual.

Trademark acknowledgments

Windows

: Microsoft Corporation

INTRODUCTION

1 2 3 4 5 6

This manual describes the WinType 4000 laser printer. It is intended for use as a reference when performing maintenance procedures. This manual is prepared for use at a technical level and is not for the general user.

This manual is divided into the following sections:

Chapter 1 General Specifications

Specifications, safety information

Chapter 2 Theory of Operation

A description of the principles of the electrical and mechanical systems and their functions

Chapter 3 Parts Replacement and Adjustments

Explanation of disassembly, reassembly, and adjustment procedures

Chapter 4 Maintenance Guide

Contains an overview of steps for recovering from a breakdown, connector layout diagrams, wiring connections, and other information useful in maintenance operations.

Chapter 5 Troubleshooting

Contains breakdown analysis procedures used when repairing breakdowns.

Chapter 6 Parts List

Illustrations showing disassembly diagrams, part numbers and part names

* In this manual, MCU PWB is the abbreviation for Main Control Unit Printed Wiring Board.

CHAPTER 1

GENERAL SPECIFICATIONS

1. GENERAL SPECIFICATIONS................................................................................3

2. SAFETY INFORMATION........................................................................................6

2-1. Power Supply .......................................................................................................... 6

2-2. Drive Parts............................................................................................................... 6

2-3. Safety Devices ........................................................................................................ 6

2-4. Laser safety............................................................................................................. 7

3. PRINTER COMPONENTS......................................................................................8

– 2 –

GENERAL SPECIFICATIONS

– 3 –

GENERAL SPECIFICATIONS

1. GENERAL SPECIFICATIONS

Engine

Printing process Electro-photographic

Resolution 300 x 300 dpi (Smoothing off)

600 dpi class (Smoothing on)

Exposure Semi-conductor laser beam scanning

Fixing Thermal fusing using heated rollers

Printing speed

Warm-up time 45 seconds or less after power on at 22°C (72°F)

(115 volts or 220 volts)

Time for first print 20.5 seconds for Letter paper

21.1 seconds for A4 paper

Continuous printing speed Min. 4 pages per minute for Letter or A 4 size paper

Printable area 4mm in from the edge of the paper on all sides

Paper feed

Input tray Capacity: 100 sheets of standard paper, 30 overhead (OHP) trans-

parencies, 30 label sheets or 10 envelopes

Paper weight: From 60 g/m2 (16 lb.) – 135 g/m2 (36 lb.)

Output tray Face down

Capacity: Approximately 50 sheets

Printing materials

Standard paper XEROX 4024 DP 20 lb 8.5" x 11" cut sheet paper (US)

Special printing OHP film: 8.5" x 11" XEROX, PN 3R2780 (US) materials A4 XEROX, PN 3R91330 (Europe)

Label: 8.5" x 11" XEROX, PN 3R4469 (US)

A4 XEROX, PN 3R97408 (Europe)

Envelope: Com-10 Monroe Brand, Monarch Monroe Brand

– 4 –

GENERAL SPECIFICATIONS

Toner cartridge

The toner cartridge consists of an OPC drum, developing roller and blades, primary charge roller, drum cleaner and high definition black toner.

Toner save mode Off/Dark/Medium/Light

Mode Yield Off Approx. 4000 pages Dark Approx. 5000 pages Medium Approx. 5700 pages Light Approx. 8000 pages

Mean printing life Starter cartridge: 4000 sheets at 5% paper coverage

Replacement cartridge: 4000 sheets at 5% paper coverage

Power specifications

Input line voltage/ For US Voltage Frequency frequency Min.: 90V 47Hz

Normal: 100/120V 50/60Hz Max.: 132V 63Hz

For Europe and Asia/Pacific

Voltage Frequency Min.: 198V 4 7Hz Normal: 220/240V 50/60Hz Max.: 264V 63Hz

Power consumption Maximum power consumption when warming-up and printing is as

follows 100/120V Less than 400W (less than 3A) 220/240V Less than 400W (less than 2A)

Environmental specifications Energy Star Compliant

Temperature, humidity Print engine with toner cartridge: and altitude Operating: 5 – 35°C (41 – 95°F) at 15 – 85% RH (no conden-

sation)

Non-operating: 20 – 40°C (60 – 104°F) at 5 – 95% RH (no conden-

sation) 0 – 2,500 meters (0 – 8,200 feet)

Print engine without toner cartridge:

Non-operating: 20 – 40°C (60 – 104°F) at 5 – 95% RH (no conden-

sation) 0 – 15,000 meters (0 – 49,200 feet)

Acoustic noise Printing: 48 dB (A) or less

Warm up: 38 dB (A) or less In accordance with ISO 7779

Dust emission Less than 0.1mg/m

concentration: Measured in accordance with Mass Measurements Method

– 5 –

GENERAL SPECIFICATIONS

Reliability specifications

MPBF Recommended usage: Average 2,000 pages per month

Maximum 10,000 in any one month

MPBF: 60,000 pages

MTTR Within 30 minutes

Jam ratio 1/1000 using recommended paper

1/100 using special printing materials

Double feed ratio 1/1000 using recommended paper

1/100 using special printing materials

Life 100,000 pages or 5 years

Dimensions 330mm x 235mm x 265mm

(13.0 in. x 9.25 in. x 10.4 in.)

Weight 6.5 kg. (14.3 lbs.) without toner cartridge

7.5 kg. (16.5 lbs.) with toner cartridge

Controller

I/F High speed bi-directional parallel interface

Panel 2 LED lamps (Ready and Error)

Software

Windows Direct (GDI) mode Provides fast, WYSIWYG output from Windows (GDI) mode applica-

tions

PCL mode Provides compatibility with the popular printer languages used in the

LaserJet II series. Both Windows applications and DOS applications running under Windows can use PCL emulation mode for printing.

PostScript mode Provides compatibility with the sophisticated PostScript language. Both

Windows applications and DOS applications running under Windows can use PostScript emulation mode for printing.

Paper size

Paper sizes available A4, Letter, Legal, A5, Executive, B5, Com 10, C5, DL, Monarch in GDI mode

Paper sizes available in A4, Letter, Legal, Executive, Com 10, C5, DL, Monarch PCL4 emulation

Paper sizes available in A4, Letter, Legal, A5, Executive, B5, Com 10, C5, DL, Monarch PostScript emulation

– 6 –

GENERAL SPECIFICATIONS

2. SAFETY INFORMATION

In order to prevent accidents from occurring while maintenance is being carried out, all warnings and precautions should be strictly observed while work is being carried out. Never attempt any kind of dangerous procedure when servicing this machine. The precautions noted below only cover a few of the situations which could foreseeably occur during maintenance operations. Please make sure every safety precaution is observed while work is being carried out.

2-1. Power Supply

In order to prevent electrical shock, burns, damage to the equipment and other problems, always make sure the power supply is turned off and the power supply cable has been unplugged before maintenance work is carried out. If the power must be left on in order to measure voltage or for other reasons, make sure sufficient precautions are taken to prevent electrical shock, and follow the procedures laid down in this manual.

2-2. Drive Parts

Inspection of drive section parts such as sprockets and gears should be carried out using a hand crank.

DANGER: Never inspect these parts while the equipment is in operation!

2-3. Safety Devices

Thorough consideration should be given to safety devices designed to prevent accidents (fuses, interlock switches, etc.) as well as those handled by the user in the course of operating the equipment (covers, panels, etc.), in order to make sure they fulfill their function as safety equipment.

DANGER: In order to prevent exposure to the laser beam contained in the printer, the following precautions must

always be strictly observed. Exposure to the laser beam can result in blindness.

• Never open a cover (ROS assembly) that has the label shown in figure 1-3 on it.

• When disassembling and adjusting the equipment, always make sure the power supply has been turned off first.

• This equipment is provided with a two-stage safety switch function, so that it can be operated even with the covers removed, by pressing the interlock switch. When using this method of operation, never short the other switch at the same time (the second switch is pressed when the actuator at the back of the EP toner cartridge attachment section is pressed).

• When servicing the printer’s optical system, be careful not to place screwdrivers or other reflective objects in the path of the laser beam. Be sure to take off accessories, such as watches and rings, before working on the printer. A reflected beam, though invisible, can permanently damage your eyes. Because the laser beam is invisible, be especially careful when servicing the optical system.

Figure 1-1 Itnerlock switch location

Itnerlock switch

– 7 –

GENERAL SPECIFICATIONS

2-4. Laser safety

This printer is certified as a Class 1 laser product. This means that this laser product does not emit harmful laser beams. This printer emits a Class 3B laser beam, but the beam is entirely enclosed within a protective case and an external cover, and cannot escape from the printer while the printer is in use.

CLASS 1 LASER PRODUCT. LUOKAN 1 LASERLAITE. KLASS 1 LASER APPARAT.

CLASS 3B LASER WAVE LENGTH 780nm (INVISIBLE) RATED POWER 5mW

LUOKAN 3B LASER AALLONPITUUS 780nm (NÄKYMÄTÖN) TEHO 5mW

Figure 1-3 Caution Label

VARO! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso

säteeseen.

VARNING! Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen.

Laser Klasse 1 Laser de Classe 1 Láser Clase 1 Laser Luokan 1 Laser Klass 1

Figure 1-2 Class 1 Label

– 8 –

GENERAL SPECIFICATIONS

3. PRINTER COMPONENTS

Figure 1-4 External Dimensions Figure 1-5 Rear View

Figure 1-6 Front View

Power release lever

Power switch

Extension bar and

paper support extender

Upper paper tray

330 mm

235 mm

265 mm

Ventillation fan outlet

Front cover

Output paper

extender

Output tray

Ready LED lamp

(Green)

Error LED lamp

(Orange)

Power switch Power card socket

Parallel interface

connector

CHAPTER 2

THEORY OF OPERATION

1. PRINTING PROCESS...........................................................................................11

2. PAPER TRANSPORTATION ...............................................................................14

3. FUNCTIONS OF THE MAIN PARTS....................................................................15

3.1 Covers.................................................................................................................... 15

3.2 Feeder & Drive ...................................................................................................... 15

3.3 Fuser & Paper Exit................................................................................................ 17

3.4 Photographics & ROS .......................................................................................... 19

3.5 Electrical................................................................................................................ 21

– 10 –

THEORY OF OPERATION

– 11 –

THEORY OF OPERATION

1. PRINTING PROCESS

The printing process for this system consists of the repetition of the following five basic steps:

Charging Scanning exposure Developing FusingTransfer

(Separation)

(Cleaning)

CM blade

Heat roller

Fuser assembly

Pressure roller

BTR

Drum

Magnetic roller

Ros assembly

BCR

Figure 2-1 Printing Process

: Laser beam : Paper path

– 12 –

THEORY OF OPERATION

• Description of the Printing Process

Step Details

Charging

The surface of the rotating drum in the EP toner cartridge is uniformly negatively charged by the electric charge from the BCR (Bias Charge Roller).

The ROS assembly scans the exposure by converting the image signal from the MCU PWB into an optical signal (laser beam) and directs the laser beam onto the drum.

Scanning Exposure When an image is present, a laser is emitted and the laser beam is irradiated onto the surface

of the drum causing the irradiated area to be set to a neutral charge, thus enabling an invisible latent electrostatic image to be formed on the drum’s surface.

The latent electrostatic image on the drum’s surface attracts toner from the surface of the magnetic roller in the EP toner cartridge, forming a visible image on the surface of the drum.

Developing

The magnet inside the magnetic roller causes the toner, which also has magnetic properties, to adhere to the roller while the friction between the rotating magnetic roller and the CM blade (Charge Metal Blade) negatively charges the toner, so that a thin layer of toner is n the surface of the magnetic roller.

Transfer

A positive charge is applied to the back of the paper by the BTR (Bias Transfer Roller) causing the toner on the drum’s surface to be transferred to the paper. Applying a positive charge to the back of the paper causes the paper itself to be positively charged, so that the paper adheres to the drum

(Separation)

The firmness of the paper causes the paper with the toner affixed to it to be separated from the drum.

Fusing

The heat from the heat roller heated by the heat rod and the pressure from the pressure roller causes the toner to be fused to the paper in the fuser assembly.

(Cleaning)

Any residual toner remaining on the drum after the transfer step is scraped off by the cleaning blade which is in contact with the drum’s surface.

–350V

–V

–350V

–V

–350V

–V

–210V (Developing bias)

Laser beam

Scanning Exposure DevelopingCharging

Toner image (Visible image)

Electrostatic latent image (Invisible image)

Drum’s surface

Voltage

Figure 2-2 Printing Process (Drum’s Surface)

– 13 –

THEORY OF OPERATION

Cleaning blade

BCR

AC Bias: 1.6kVp-p (f=2.4kHz) DC Bias: –210V

Laser beam

Toner

DC Bias (+): 250V~2600V (0.5µA~1.6µA) (–): –700V

Magnetic roll

AC Bias: 200µA (f=160Hz) DC Bias: –350V

Paper

Eliminator

Pressure roll

BTR

Drum ( 30mm)

CM blade

Toner

17.28

Heat roll

Transfer

Scanning Exposure

152˚C 140˚C

158˚C 150˚C

Separation

While the lamp flashes six times

After the lamp flashes the sixth time

Developing

Charging

Heat roll

Figure 2-3 Printing Process (Seven Steps)

– 14 –

THEORY OF OPERATION

- - -

: Transport path of the paper

Input tray assembly

Feeder assembly

Heat roller

Pinch roller

Exit roller

Delivery tray assembly

Fuser assembly

Pressure roller

Drum

BTR

Feed roller

Figure 2-4 Paper Transportation

2. PAPER TRANSPORTATION

The following diagram shows the order in which paper passes over the rollers.

Paper that is inserted is automatically fed.

Paper is supplied and transported by the feed roller.

Paper is transported by the drum and BTR assembly.

Paper is transported by the heat roller and pressure roller.

Paper is discharged by the exit roller in the fuser assembly and the pinch roller in the

fuser top cover assembly.

– 15 –

THEORY OF OPERATION

3. FUNCTIONS OF THE MAIN PARTS

The main parts are briefly described and illustrated as follows. In order to remain consistent with the parts list, parts are divided into the following five sections based on their type. 1 Covers 2 Feeder & Drive 3 Fuser & Paper Exit 4 Photographics & ROS 5 Electrical

3.1 Covers

This consists of the printer, four covers and two trays. (Refer to Chapter 6, Parts List)

3.2 Feeder & Drive

• Input Tray Assembly

Regular (cut sheet) paper, envelopes can be fed into the printer from this tray. Slide the left and right paper guides to hold the paper in place.

• Feed Roller Assembly

This assembly consists of the feed roller and the feed clutch. After the spring clutch in the feed clutch has been set by the movement of the feed solenoid, the feed roller assembly rotates driven by the drive assembly and the feed rollers feed the paper into the printer from the input tray assembly. One full rotation of the feed roller assembly causes the spring clutch to be released by the feed solenoid and disables the drive assembly from transmitting a driving signal.

• Feed Solenoid

The feed solenoid controls the operations (rotation and stop) of the feed roller assembly.

• Pre-regi. Sensor

This sensor detects whether paper is sent by the paper set lever based on changes in the position of the regi. actuator and sends a signal to the MCU PWB.

• MCU PWB

The MCU PWB controls the regi. solenoid, rotates the feed roller assembly and feeds the paper into the printer with the paper set lever. After receiving the signal from the regi. sensor, the MCU PWB instructs the EP toner cartridge to generate the image. (Refer to section 3.5 Electrical System. Illustrations of the parts described above are shown in Chapter 6, Parts List PL5.)

• Drive Assembly

The drive assembly consists of the main motor and the gear that transmits the driving force. This assembly transmits a driving force by rotating the main motor.

– 16 –

THEORY OF OPERATION

Feed clutch

Feed solenoid

Feed roller assembly

Paper set lever

Retard pad

Pre-regi. sensor

Figure 2-5 Feeder & Drive

Drive assembly

Main motor

Paper set lever

Input tray assembly

Feed roller

– 17 –

THEORY OF OPERATION

3.3 Fuser & Paper Exit

• Fuser Assembly

The fuser assembly includes the heater rod, heat roller, pressure roller, thermostat, thermistor and exit sensor. This assembly fixes the toner onto the paper using heat and pressure, then outputs the printed paper. Parts in the fuser assembly are referred to as fusers.

Heater Rod

The heater rod is a lamp with a heated coil sealed inside it and serves as the heat source inside the heat roller.

Heat Roller

The hollow, metal heat roller is coated on the surface and provides the heat to fuse the toner to the paper.

Pressure Roller

The rubber pressure roller provides the pressure to fuse the toner to the paper.

Thermistor

The thermistor is in contact with the heat roller and responds to its surface temperature. When the heater rod is ON (a light is on), the thermistor controls the ON/OFF position of the heater rod according to the temperature detected and prevents excessive increases in the primary temperature.

Thermostat

The thermostat is in series with the power supply in the heater rod. If the thermistor fails to prevent an excessive increase in the (primary) temperature, the thermostat prevents an excessive increase in the secondary temperature by opening the point of contact that results when the ambient temperature reaches a set level.

Thermal Fuse

The thermal fuse is in series with the heater rod circuit. If the thermistor fails to prevent the (primary) temperature from getting too high and the thermostat fails to prevent the (secondary) temperature from getting too high, the fuse will prevent tertiary overheating by melting when the ambient temperature reaches a set level.

Exit Roller

After fusing the toner onto the paper, the exit roller passes the printed paper out of the printer.

Exit Sensor

The exit sensor detects the state of the printed paper in the exit area in response to changes in the position of the exit actuator. The exit sensor is turned ON when the presence of the printed paper is detected.

– 18 –

THEORY OF OPERATION

Heat roller

Thermostat

Thermal fuse

Thermister

Exit sensor

Exit roller

Pressure roller

Heater rod

Pinch roller

Pressure roller

Heat roller

Exit roller

Figure 2-6 Fuser & Paper Exit

– 19 –

THEORY OF OPERATION

3.4 Photographics & ROS

• HVPS (HVPS: High Voltage Power Supply)

The HVPS supplies voltage/current to the BCR, magnetic roller, BTR and drum during the charging, developing and transfer steps. It also supplies current to the fan. (The front cover interlock switch is mounted onto the HVPS.)

• ROS Assembly (ROS: Raster Output Scanner)

The ROS assembly consists of the LD assembly, the scanner assembly, the SOS PWB and the mirror. Parts in the ROS assembly are referred to as ROS items.

LD Assembly (LD: Laser Diode)

The LD assembly converts electrical signals into a laser beam and emits light. The laser diode output (LD power) is kept constant and transmitted through the monitor’s circuits.

Scanner Assembly

A polygonal mirror with four specular surfaces is mounted on the scanner motor which rotates at a constant speed. The rotation of the polygonal mirror changes the laser beam’s angle of reflection and causes one surface of the mirror to scan one line (in the direction of the drum’s axis). The laser beam reflected by the polygonal mirror is irradiated onto the drum’s surface via the lens and mirror.

SOS PWB (SOS: Start of Scan)

The irradiation of the laser beam onto the SOS sensor causes the laser beam to be converted into an electrical signal (SOS signal) and allows the initial scanning position of a line to be detected.

• CRU Sensor PWB (CRU: Customer Replaceable Unit)

The CRU sensor consists of a CRU switch which detects the presence of the EP toner cartridge and is turned ON or OFF in response to the CRU actuator. The CRU switch is in series with the circuit emitting the laser beam and ensures the safety of the laser beam.

• EP toner cartridge (EP: Electrical Photographics)

The EP toner cartridge consists of the drum, BCR, magnetic roller, CM blade and cleaning blade.

Drum

The drum is constructed of an aluminum cylinder covered with an OPC (organic photo conductor) sensitive material with photoconductive properties (the ability to retain the electric charge in darkness and set the charge to neutral in light). The drum produces a printed image based on the potential difference (latent electrostatic image) on its surface.

BCR (BCR: Bias Charge Roller)

The BCR sets the drum’s surface to a uniform electrical charge.

Magnetic Roller

The magnetic roller supplies toner to the drum for developing a latent electrostatic image on the surface of the drum.

BTR (BTR: Bias Transfer Roller)

The BTR applies a positive charge to the back of the paper and transfers the toner from the drum’s surface to the paper.

CM Blade (CM: Charge Metal)

The CM blade not only uniformly controls the amount of toner on the surface of the magnetic roller, but also uses friction to give the toner its electric charge.

Cleaning Blade

The cleaning blade cleans the surface of the drum by scratching off the residual toner after the transfer step.

– 20 –

THEORY OF OPERATION

Mirror

Scanner assemblyLD assembly

ROS assembly

SOS PWB

Magnetic roller

BTR

Drum

BCR

CM blade

EP toner cartridge

HVPS

CRU sensor

Figure 2-7 Photographics & Ros

– 21 –

THEORY OF OPERATION

3.5 Electrical

• LED & LED PWB

The condition of the printer is displayed by LEDs (green/orange) and can be confirmed by observing these LEDs.

• LVPS Assembly (LVPS: Low Voltage Power Supply)

The LVPS assembly not only supplies AC power from the power supply to the heater rod in the fuser assembly, but also generates and supplies a stable low-voltage DC power for use in the logic circuitry, etc. It includes a main power switch which is used to turn the main power supply to the printer ON or OFF.

• MCU PWB

The MCU PWB controls the whole printing operation. Its main functions are as follows:

(1) Receive information from the sensors and switches (2) Control the ROS, fuser and drive assemblies (3) Control the printing sequence (4) Distribute low-voltage DC power from the LVPS assembly to each component

• Front Cover Interlock Switch

The interlock switch is a safety switch which completes or breaks the AC power circuit and the low-voltage (24V) DC power circuit (but not the power supply to the fan) when the front cover assembly is closed or opened (the switch is pressed or released). (This switch is mounted onto the HVPS.)

• Fan

The fan receives power from the HVPS and draws in air which is used to lower the internal temperature of the system, thereby preventing it from increasing. (Refer to section 1.2 Parts List in chapter 6, Parts List.)

Figure 2-8 Electrical

LVPS assembly

Main power switch

Front cover Interlock switch

LED PCW

MCU PWB

LED (orange)

LED (green)

Fan

– 22 –

THEORY OF OPERATION

Figure 2-9 Electrical

CHAPTER 3

REPLACEMENT AND ADJUSTMENTS OF PARTS

This chapter explains adjustment, disassembly and reassembly of the printer. The following precautions should be noted during disassembly and reassembly:

1. Disconnect the printer from the wall outlet before servicing it.

2. Unless otherwise specified, the printer is assembled by reversing the disassembly procedure.

3. Do not operate the printer with any parts removed.

4. When you remove the EPX toner cartridge, be sure to keep the cartridge in its original box. If the box is not available, cover the cartridge with a cloth or put it in a dark place to prevent light from affecting the drum inside the cartridge.

1. COVERS ..............................................25

1.1 Front Cover .................................... 25

1.2 Top Cover ....................................... 26

1.3 Rear Cover...................................... 27

1.4 Bottom Cover ................................. 28

1.5 Fan .................................................. 29

2. FEEDER & DRIVE ...............................30

2.1 Feeder Assembly ........................... 30

2.2 Feed Roller Assembly ................... 31

2.3 Feed Solenoid ................................ 32

2.4 Paper Set Lever.............................. 33

2.5 Retard Pad...................................... 34

2.6 Pre-Regi. Sensor............................ 35

2.7 Drive Assembly.............................. 36

2.8 Main Motor...................................... 37

3. FUSER .................................................38

3.1 Fuser Assembly ............................. 38

3.2 Pressure Roller .............................. 39

3.3 Heater Rod...................................... 40

3.4 Heat Roller...................................... 42

3.5 Thermostat ..................................... 43

3.6 Thermal Fuse ................................. 44

3.7 Thermistor ...................................... 45

3.8 Exit Sensor ..................................... 46

4. ROS......................................................47

4.1 ROS Assembly ............................... 47

4.2 SOS Sensor Assembly .................. 48

4.3 Laser Diode .................................... 49

4.4 Scanner Assembly......................... 50

4.5 Mirror .............................................. 51

4.6 HVPS ............................................... 52

4.7 Front Cover Interlock Switch

Actuator .......................................... 53

4.8 CRU Sensor PWB & Actuator ....... 54

5. ELECTRICAL SYSTEM....................... 55

5.1 PWB Chassis.................................. 55

5.2 MCU PWB ....................................... 56

5.3 LVPS Assembly ............................. 57

– 24 –

REPLACEMENT AND ADJUSTMENT OF PARTS

– 25 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

1. COVERS

1.1 Front Cover

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

(1) Grasping the left and right sides of the front cover [1], open it by pulling it down. (2) Remove the EP toner cartridge and keep it in a safe place. (3) Pressing down on the center of the printer with one hand, separately unhook the left and right hinges

[2] on the front cover [1] and remove the front cover.

[Assembly]

Reverse the disassembly procedure.

[1]

[2]

– 26 –

REPLACEMENT AND ADJUSTMENT OF PARTS

1.2 Top Cover

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

(1) Open the front cover [1], remove the EP toner cartridge and keep it in a safe place. (2) Remove the two screws [2] that can be seen when the front cover is opened. (3) While pressing down on the center of the printer with one hand, separately unhook the left and right

bosses [3] on the input tray assembly [4] and remove the input tray assembly.

Caution: In order to illustrate the positions of the screws in relation to the input tray assembly, fig.

(4) Remove the two screws [5] revealed when the input tray assembly is removed and raise the top cover

[6] a few centimeters.

(5) Raise the top cover to disconnect PJ321 [7] from the LED PWB.

[Assembly]

Reverse the disassembly procedure.

Caution: When installing the top cover [1] on the printer, be sure that the harness is not pinched between any other

parts.

[1]

[2]

[5]

[6]

[3]

[4]

[7]

– 27 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

1.3 Rear Cover

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Disconnect the printer’s power cord from the wall outlet. (2) Remove the two screws [1] securing the MCU PWB interface connector (PJ31) to the rear cover. (3) Remove the two screws [2] on the top left and right that are attaching the rear cover to the printer. (4) Remove the center screw and the two screws [3] on the bottom left and right and remove the rear cover

[4].

[Assembly]

Reverse the disassembly procedure.

[3]

[4]

[2] [1]

– 28 –

REPLACEMENT AND ADJUSTMENT OF PARTS

1.4 Bottom Cover

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the front cover. (Refer to section 1.1)

Caution: Be careful not to break the front cover interlock actuator when installing the bottom cover while the front

cover is removed.

(2) Turn the printer over onto its top cover. (Turn it upside down.) (3) Remove the four screws [1] securing the bottom cover and remove the bottom cover [2]. (4) Disconnect CN121 [3] from the laser diode [4] and remove the harness [5] from the bottom cover. (5) Disconnect PJ152 [6] from the HVPS and remove the bottom cover.

[Assembly]

Reverse the disassembly procedure.

Caution 1: Pass the harness [5] through the bottom cover [2], then connect it to connector CN 121. Do not connect the

harness directly to connector CN 121 [3] without passing it through the bottom cover.

Caution 2: Insert PJ152 from the fan into the HVPS before installing the bottom cover.

[2]

[5]

[6]

[1]

[4]

[3]

– 29 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

1.5 Fan

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the bottom cover. (Refer to section 1.4) (2) Disconnect PJ152 [1] attaching the HVPS to the fan [2]. (3) Inserting a miniature standard screwdriver [3] between the bottom cover [4] and fan [2], unhook the

latch and remove the fan.

[Assembly]

Reverse the disassembly procedure.

[4]

[3]

[2]

[1]

– 30 –

REPLACEMENT AND ADJUSTMENT OF PARTS

2. FEEDER & DRIVE

2.1 Feeder Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the top cover. (Refer to section 1.2) (2) Remove the four screws [1] securing the feeder assembly [2]. (3) Disconnect PJ181 [3] from the pre-regi. sensor. (4) Remove the rear cover. (Refer to section 1.3) (5) Disconnect PJ16 [4] from the MUC PWB and remove the feeder assembly [2].

[Assembly]

Reverse the disassembly procedure.

Caution: When installing the feeder assembly [2] on the printer, be sure the harnesses [6] are not pinched between

any other parts.

[2]

[6]

[4]

[3]

[1]

– 31 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

2.2 Feed Roller Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Top cover (Refer to section 1.2)

• Feeder assembly (Refer to section 2.1)

• Spring [1].

• Feed roller assembly [2] Pressing down on the feeder frame [3] of the feeder assembly, separately unhook the left and right ends of the feed roller assembly [2] and remove it.

[Assembly]

Reverse the disassembly procedure.

[2]

[1]

[3]

– 32 –

REPLACEMENT AND ADJUSTMENT OF PARTS

2.3 Feed Solenoid

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Top cover (Refer to section 1.2)

• Feeder assembly (Refer to section 2.1)

• Screw [1]

• Feeder solenoid [2]

• Feed roller assembly [3]

[Assembly]

Reverse the disassembly procedure.

Caution: When installing the feed solenoid [2] on the feeder assembly, align the hole in the stabilizing boss [4] on

the feeder frame [5] with the hole on the feed solenoid. Tighten the screw while pressing down on the back of the feed solenoid.

[2]

[1]

[5]

[4]

[3]

– 33 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

2.4 Paper Set Lever

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Top cover (Refer to section 1.2)

• Feeder assembly (Refer to section 2.1)

• Spring [1]

• Paper set lever [2]

[Assembly]

Reverse the disassembly procedure.

[1]

[2]

– 34 –

REPLACEMENT AND ADJUSTMENT OF PARTS

2.5 Retard Pad

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Top cover (Refer to section 1.2)

• Feed roller assembly (Refer to section 2.2)

• Retard pad [1] Press together the retard pad clips [2] on the back of the feeder frame [3] and remove the retard pad.

Caution: When removing the retard pad [1], do not to lose the spring [4] that is installed behind it.

[Assembly]

Reverse the disassembly procedure.

[2]

[4]

[3]

[1]

– 35 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

2.6 Pre-Regi. Sensor

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Top cover (Refer to section 1.2)

• Feeder assembly (Refer to section 2.1)

• Pre-regi. sensor [1] Unhook the pre-regi. sensor clips [2] on the back of the feeder frame and remove the pre-regi. sensor [1].

[Assembly]

Reverse the disassembly procedure.

[2]

[1]

– 36 –

REPLACEMENT AND ADJUSTMENT OF PARTS

2.7 Drive Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Feeder assembly (Refer to section 2.1)

• Fuser assembly (Refer to section 3.1)

• Rear cover (Refer to section 1.3)

• PJ14 [1] Remove the three screws [2] securing the drive assembly and, while lifting the rear of the drive assembly [3], remove it.

[Assembly]

Reverse the disassembly procedure.

Caution: Remove the bottom cover (refer to section 1.4) and be sure the HVPS terminal [4] on the drive assembly

[3] is securely connected to the HVPS.

[4]

[1]

[3]

[2]

– 37 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

2.8 Main Motor

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Top cover assembly (Refer to section 1.2)

• Feeder assembly (Refer to section 2.1)

• Fuser assembly (Refer to section 3.1)

• Drive assembly (Refer to section 2.7)

• Two screws [1]

• Main motor [2]

[Assembly]

Reverse the disassembly procedure.

Note: Since the holes [3] attaching the main motor [2] to the drive assembly determine the position in which it is

installed, it is not necessary to adjust the backlash.

Caution: Install the main motor with the harness [4] facing towards the rear.

[2]

[4]

[3]

[1]

– 38 –

REPLACEMENT AND ADJUSTMENT OF PARTS

3. FUSER

3.1 Fuser Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be very careful not to get burnt when working on the fuser since it becomes hot while the printer is being

operated.

(1) Remove the following units:

• Top cover (Refer to section 1.2)

• PJ114 [1]

• PJ131 [2]

• PJ132 [3]

• Screws [4]

• Fuser assembly [5] Remove the two screws [4] securing the fuser and while lifting the rear of the fuser assembly [5], remove it from the frame.

[Assembly]

Reverse the disassembly procedure.

Caution: When installing the fuser assembly [5] on the printer, be sure the harnesses are not pinched between any other

parts.

[1]

[4]

[5]

[2]

[3]

– 39 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

3.2 Pressure Roller

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser assembly (Refer to section 3.1)

• Screw [1]

• Two screws [2]

• Fuser cover [3]

Lift the fuser cover from the fuser assembly [4].

• Pressure roller [5]

Turn over the fuser cover [3], remove the two screws [6] securing the inlet chute and remove

the pressure roller [5].

[Assembly]

Reverse the disassembly procedure.

Caution 1: When installing PJ114, be sure the green ground wire [7] and the diodes are installed correctly. (The diodes

should be installed with the cathode marks in the correct position.)

Caution 2: The ground plate on the inlet chute [8] should be in contact with the pressure roller shaft [5] (silver-colored

section).

[6]

[5]

[3]

[4]

[2]

[3]

[1]

[7]

[2]

[8]

Cathode marks

– 40 –

REPLACEMENT AND ADJUSTMENT OF PARTS

3.3 Heater Rod

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution 1: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser assembly (Refer to section 3.1)

• Screw [1]

• Two screws [2]

• Fuser cover [3]

• Two screws [4]

• Fuser right housing [5]

• Screw [6]

• Two screws [7]

• Fuser left housing [8]

• Pinch roller [9]

[4]

[6]

[2]

[3]

[5]

[9]

[1]

[2]

[7]

[8]

– 41 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

(2) Remove the following units:

• Two screws [10]

• Paper guide [11]

Caution 2: Do not to lose the spring [12] that is placed over the screws.

• Screw [13]

(3) Pull out the heater rod [14] from the heat roller [15].

Caution 3: Do not touch the glass surface of the heater rod [14] since oil from your hands may damage

it.

[Assembly]

Reverse the disassembly procedure.

Caution: When installing PJ114 [17], be sure the green ground wire [16] and the diodes are installed correctly. (The

diodes should be installed with the cathode marks in the correct position.)

[10]

[12]

[11]

[14]

[15]

[13]

[16]

[17]

– 42 –

REPLACEMENT AND ADJUSTMENT OF PARTS

3.4 Heat Roller

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser assembly (Refer to section 3.1)

• Pressure roller (Refer to section 3.2)

• Heater rod (Refer to section 3.3)

• Heat roller [1] (Refer to section 3.3) Sliding the right and left ends of the H/R bearing [2] in the direction of the arrow, remove the heat roller [1].

[Assembly]

Reverse the disassembly procedure.

Caution: There is only one correct way to install the gear [3]. Insert the tab [4] on the gear into the notch [5] on the

heat roller. (Do not install the gear in any other manner.)

[3]

[5]

[2]

[1]

[2]

[4]

– 43 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

3.5 Thermostat

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser (Refer to section 3.1)

• Pressure roller (Refer to section 3.2)

• Heater rod (Refer to section 3.3)

• Heat roller (Refer to section 3.4)

• Electrical frame [1] Pull out the exit sensor actuator [2], remove the two screws [3] on the electrical frame used to attach the thermostat and thermistor and detach it [1] from the fuser frame [4].

• Two screws [5]

• Thermostat [6]

[Assembly]

Reverse the disassembly procedure.

[1]

[5]

[6]

[2]

[3]

[4]

– 44 –

REPLACEMENT AND ADJUSTMENT OF PARTS

3.6 Thermal Fuse

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser (Refer to section 3.1)

• Pressure roller (Refer to section 3.2)

• Heater rod (Refer to section 3.3)

• Heat roller (Refer to section 3.4)

(2) Loosen the screw [5] securing the thermostat and the screw [6] securing the plate and remove the

thermal fuse [7].

[Assembly]

Reverse the disassembly procedure.

[4]

[7]

[6]

[5]

[2]

[3]

[1]

– 45 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

3.7 Thermistor

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser (Refer to section 3.1)

• Pressure roller (Refer to section 3.2)

• Heater rod (Refer to section 3.3)

• Heat roller (Refer to section 3.4)

• Electrical frame (Refer to section 3.5) Pull out the exit sensor actuator, remove the two screws on the electrical frame used to attach the thermostat and thermistor and detach it from the fuser frame.

• Screw [1]

• Thermistor [2]

[Assembly]

Reverse the disassembly procedure.

Caution: Install the thermistor [2] so that it is touching with the back of the heat roller.

[1]

[2]

– 46 –

REPLACEMENT AND ADJUSTMENT OF PARTS

3.8 Exit Sensor

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

Caution: Be careful not to get burnt when working on the fuser since it becomes very hot while the printer is being

operated.

(1) Remove the following units:

• Fuser (Refer to section 3.1)

• Pressure roller (Refer to section 3.2)

• Heater rod (Refer to section 3.3)

• Heat roller (Refer to section 3.4)

(2) Press together the exit sensor [1] clips [2] and remove it from the fuser frame [3].

[Assembly]

Reverse the disassembly procedure.

[3]

[2]

[3]

[1]

– 47 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

4. ROS

4.1 ROS Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place. The ROS must not be running while it is being handled.

(1) Turn the printer over onto its top cover. (Turn it upside down.) (2) Remove the bottom cover. (Refer to section 1.4) (3) Disconnect CN122 [1] from the scanner assembly [2]. (4) Disconnect CN121 [3] from the laser diode [4]. (5) Disconnect CN123 [5] from the SOS sensor assembly [6]. (6) Remove the three screws [7] securing the ROS assembly and remove the ROS assembly [8].

[Assembly]

Reverse the disassembly procedure.

Caution: When installing the ROS assembly on the printer, align the holes in the stabilizing bosses and ROS assembly

before inserting the screws.

[8]

[2]

[7]

[4]

[3]

[6]

[5]

[1]

– 48 –

REPLACEMENT AND ADJUSTMENT OF PARTS

4.2 SOS Sensor Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place. The ROS must not be running while it is being handled.

(1) Turn the printer over onto its top cover. (Turn it upside down.) (2) Remove the following units:

• Bottom cover (Refer to section 1.4)

• ROS assembly (Refer to section 4.1)

• Screw [1]

• SOS sensor assembly [2]

[Assembly]

Reverse the disassembly procedure.

[2]

[1]

– 49 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

4.3 Laser Diode

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place. The ROS must not be running while it is being handled.

(1) Turn the printer over onto its top cover. (Turn it upside down.) (2) Remove the following units:

• Bottom cover (Refer to section 1.4)

• ROS assembly (Refer to section 4.1)

• Two screws [1]

• Laser diode [2]

Caution: The two (gold) screws covered with red paint must not be removed. If they are removed and the printer is

operated, the direction of the laser beam will change, affecting the picture quality considerably.

[Assembly]

Reverse the disassembly procedure.

[1]

[2]

– 50 –

REPLACEMENT AND ADJUSTMENT OF PARTS

4.4 Scanner Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place. The ROS must not be running when it is being handled.

(1) Turn the printer over onto its top cover. (Turn it upside down.) (2) Remove the bottom cover. (Refer to section 1.4) (3) Disconnect CN122 [1] from the scanner assembly [2]. (4) Remove the three screws [3] securing the scanner assembly to the ROS assembly and remove the

scanner assembly [2].

Note: When removing the scanner assembly [2] only, it is not necessary to remove the ROS assembly [4] from the

printer as well.

[Assembly]

Reverse the disassembly procedure.

Caution: When installing the scanner assembly [2] onto the ROS assembly [4], align the holes in the stabilizing bosses

on the ROS assembly and scanner assembly before inserting the screws [3].

[2]

[1]

[4]

[3]

[5]

– 51 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

4.5 Mirror

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place. The ROS must not be running while it is being handled.

(1) Turn the printer over onto its top cover. (Turn it upside down.) (2) Remove the bottom cover. (Refer to section 1.4) (3) Disconnect CN122 [1] from the scanner [2]. (4) Disconnect CN121 [3] from the laser diode [4]. (5) Disconnect CN123 [5] from the SOS sensor [6]. (6) Remove the three screws [7] securing the ROS assembly.

[Assembly]

Reverse the disassembly procedure.

Caution: Do not scratch or touch the front surface of the mirror with your hand; also, be sure to use the mirror clips

[9] to install it on the ROS assembly.

[2]

[1]

[4]

[3]

[6]

[5]

[7]

– 52 –

REPLACEMENT AND ADJUSTMENT OF PARTS

4.6 HVPS

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Front cover (Refer to section 1.1)

• Bottom cover (Refer to section 1.4)

(2) Turn the printer onto its front. (Turn it sideways so that the front of the printer is pointing downwards.) (3) Disconnect PJ151 [1] from the HVPS [2]. (4) Inserting a miniature standard screwdriver [3] into the small hinge hole [4] on the front cover, unhook

the latch supporting the HVPS and remove the HVPS [2].

Caution: If, while the HVPS is being removed, it catches on the drive assembly, carefully remove it without damaging

the contacts.

Note: The HVPS is supported by the latch mentioned above in (4) and the slot on the bottom cover.

[Assembly]

Reverse the disassembly procedure.

Caution: If, while the HVPS is being installed, it catches on the drive assembly, use a ruler or any other flat object

to guide in the HVPS without damaging any contacts.

[1]

[2]

[3]

[4]

– 53 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

4.7 Front Cover Interlock Switch Actuator

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the bottom cover. (Refer to section 1.4) (2) Turn the printer onto its front. (Turn it sideways so that the front of the printer is pointing downwards.) (3) Remove the screw [1] securing the front cover interlock switch actuator [2] and remove the actuator.

[Assembly]

Reverse the disassembly procedure.

[1]

[2]

– 54 –

REPLACEMENT AND ADJUSTMENT OF PARTS

4.8 CRU Sensor PWB & Actuator

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Turn the printer onto its front. (Turn it sideways so that the front of the printer is pointing downwards.) (2) Remove the following units:

• Bottom cover (Refer to section 1.4)

• Two screws [1]

• CRU sensor actuator cap [2]

• CRU sensor actuator [3]

• PJ171 [4]

• Two screws [5]

• CRU sensor PWB [6]

[Assembly]

Reverse the disassembly procedure.

[3]

[2]

[6]

[4]

[1]

[5]

– 55 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

5. ELECTRICAL

5.1 PWB Chassis (including the MCU PWB and LVPS)

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the rear cover. (Refer to section 1.3) (2) Disconnect all the harnesses except PJ11 [1] from the MCU PWB [2] and PJ111 [3] from the LVPS [4]. (3) Remove the three screws [5] securing the PWB chassis and remove the PWB chassis [6].

[Assembly]

Reverse the disassembly procedure.

Caution: Be sure that all the harnesses are firmly connected.

– 56 –

REPLACEMENT AND ADJUSTMENT OF PARTS

5.2 MCU PWB

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Rear cover (Refer to section 1.3)

• PWB chassis (Refer to section 5.1)

(2) Disconnect PJ11 [1].

To disconnect PJ11, press down on the white, plastic sliding lock [2] to unlock it and pull out the harness.

(3) Remove the two screws [3] securing the MCU PWB [4] to the PWB chassis and remove the MCU PWB.

[Assembly]

Reverse the disassembly procedure.

Caution 1: Be sure that all the harnesses are firmly connected. Caution 2: To install and lock PJ11, insert the harness and push the white, plastic sliding lock upwards until it stops.

– 57 –

REPLACEMENT AND ADJUSTMENT OF PARTS

Be sure that the power is disconnected!

5.3 LVPS Assembly

[Disassembly]

Warning: Turn off the power switch and disconnect the power supply cord from the wall outlet.

Remove the EP toner cartridge and keep it in a safe place.

(1) Remove the following units:

• Rear cover (Refer to section 1.3)

• PWB chassis (Refer to section 5.1)

(2) Disconnect PJ11 [1].

To disconnect PJ11, press down on the white, plastic sliding lock [2] to unlock it and pull out the harness.

(3) Remove the three screws [4] securing the LVPS assembly [3] to the PWB chassis and remove the LVPS

assembly.

Caution: There are four screws securing the LVPS to the LVPS frame, but it is not necessary to remove these screws

in order to remove the LVPS assembly.

[Assembly]

Reverse the disassembly procedure.

– 58 –

REPLACEMENT AND ADJUSTMENT OF PARTS

MAINTENANCE GUIDE

DESCRIPTION OF THE DIAGNOSTIC

TOOL............................................................. 61

1.1 Making Connections........................ 61

1.2 General Diagram .............................. 61

1.3 Operating Mode ............................... 61

1.4 On-line Mode .................................... 62

1.4.1 Function ....................................... 62

1.4.2 Entering On-line Mode ................ 62

1.5 User Settings Mode ......................... 62

1.5.1 Function ....................................... 62

1.5.2 Entering User Settings Mode ..... 62

1.5.3 Print Density Adjustment ............ 62

1.5.4 Input Tray Paper Setting............. 63

1.6 Test Print Mode................................ 63

1.6.1 Function ....................................... 63

1.6.2 Entering Test Print Mode............ 64

1.6.3 Operation...................................... 64

1.6.4 Simple Test Print Mode............... 64

1.7 Diagnosis Mode ............................... 65

1.7.1 Summary ...................................... 65

1.7.2 Different Types of Diagnosis

Mode Operation ........................... 65

1.7.3 Entering Diagnosis Mode ........... 65

1.7.4 List of Diagnosis Codes.............. 66

1.7.5 Diagnosis Code Selection .......... 67

1.7.6 Input Test ..................................... 67

1.7.7 Output Tests ................................ 68

1.7.8 Counter......................................... 71

1.8 Non-volatile Settings Mode............. 71

1.8.1 Function ....................................... 71

1.8.2 Entering the Non-volatile

Settings Mode .............................. 71

1.8.3 List of Non-volatile Codes .......... 73

1.8.4 Non-volatile Code Selection....... 75

1.8.5 Setting the Data ........................... 75

CHAPTER 4

2. ERROR/STATUS ...................................76

2.1 List of Error/Status Codes .............. 76

2.2 Error/Status Code Search and

2.3 Error/Status Code Display .............. 81

3. CONTROLLERS ....................................82

3.1 Paper Size Controller ...................... 82

3.2 ROS Controller................................. 83

3.2.1 Scanner Motor Operation ........... 83

3.2.2 ROS Warm Up.............................. 83

3.2.3 Standard ROS Values.................. 83

3.3 Fuser Controller............................... 84

3.3.1 Setting the Fuser Controller....... 84

3.3.2 ON/OFF Controller for the

3.3.3 Fuser Warm up ............................ 84

3.3.4 List of Fuser Temperatures ........ 84

3.3.5 List of Temperature Codes......... 85

3.4 Erase Cycle ...................................... 86

3.5 Paper Feed Regulation Time .......... 87

4. ARRANGEMENT OF

THE CONNECTORS [P/J]..................... 89

4.1 P/J Schematic Diagram ................... 89

4.2 List of P/J Connectors..................... 90

5. WIRING DIAGRAM CONNECTIONS ....91

5.1 Wiring Diagram of General

5.2 Wiring Diagram of Connections

5.2.1 Operation...................................... 92

5.2.2 Symbols used in the wiring dia-

6. PRINTING ALIGNMENT......................105

Operation .......................................... 78

Heater Rod ................................... 84

Connections ..................................... 91

Between Parts .................................. 92

gram for the part connection...... 93

MAINTENANCE GUIDE

– 60 –

MAINTENANCE GUIDE

1. DESCRIPTION OF THE DIAGNOSTIC TOOL

A diagnostic tool must be used in order to keep this printer in good working condition. When the diagnostic tool is connected to this printer, it can be used to set the control codes and to diagnose any problem.

1.1 Making Connections

Connect the diagnostic tool to connector P/J31 on the MCU PWB of the printer using a harness.

Caution: Remove the rear cover (refer to chapter 3, section 1.3) when connecting the harness to P/J31 on the

MCU PWB on the printer.

LVPS

Rear of the printer

P/J31

MCU PWB

Harness

Diagnostic tool

1.2 General Diagram

The console consists of an LCD (liquid crystal display) with two rows of 16 characters each and two input key switches.

LCD

KEY 1 KEY 0

1.3 Operating Mode

This printer is able to operate in the five following modes:

• On-line Mode

• User Settings Mode

• Test Print Mode

• Diagnosis Mode

• Non-volatile Settings Mode

Caution: It is not possible to change from one mode to another while the power is ON. To cancel one mode and

start another, you must turn the power switch OFF.

– 61 –

MAINTENANCE GUIDE

1.4 On-line Mode

1.4.1 Function

This mode allows you to print using commands from MCU PWB. In addition, this diagnostic tool will only respond when the message “RDY” (READY) is displayed.

1.4.2 Entering On-line Mode

The printer enters this mode when the power is first turned ON. Message [1] is shown on the LCD while the printer is warming up. After it has finished warming up, message [2] will be displayed. The counter showing the number of pages that have been printed, shown as “000058”, increases by one each time a page is printed. “00 00 00 00” shown on the display does not mean anything and should be ignored.

WA I T 0 0

000058

[1]

00 00 00

RDY

000058

[2]

00 00 00 00

The main motor runs while the printer is warming up.

Note: The printer continues to warm up until it is operating normally and is able to begin printing.

1.5 User Settings Mode

1.5.1 Function

This mode allows you to set values in the non-volatile memory for the character density and paper size codes for the input tray. The density of the characters can be set to any value between 0 and 4.

1.5.2 Entering User Settings Mode

This mode is entered by pressing KEY 1 while turning the power switch ON and then holding KEY 1 down for longer than three seconds. The LCD will display the following message.

DEN I TY T LIGHT<01

UN I NG 34>DARK

“DENSITY TUNING” is displayed on the top row indicating that the print density adjustment mode is now on display. The “*” on the bottom row shows the current setting (2) for the character density. This value is also assigned to non-volatile memory code 2. (Refer to 1.8.3 List of Non-volatile Codes.)

1.5.3 Print Density Adjustment

[1] After entering user settings mode, the density

value increases by one each time KEY 0 is pressed, and this value is stored in the nonvolatile memory simultaneously.

DEN I TY T

LIGHT<01

S DEN I TY T

UN I NG

4>DARK

– 62 –

[2] If the density setting is set at its maximum (4)

and KEY 0 is pressed, the setting will return to its minimum (0).

LIGHT<

UN I NG

234>DARK

MAINTENANCE GUIDE

1.5.4 Input Tray Paper Setting

If KEY 1 is pressed in user settings mode while the print density value is being displayed, the current input tray setting for the type of paper will be displayed as shown below.

FRONT TRAY S IZE

MONARCH

This setting is also assigned to non-volatile memory code A. (Refer to 1.8.3 List of Non-volatile Codes.)

[1] If KEY 0 is pressed, the type of paper can be

changed and this setting is entered in the non-

[2] If KEY 1 is pressed, the density value will be

displayed.

volatile memory at the same time.

FRONT TRAY S IZE

LEGAL- 13˝

DENSI TY

LIGHT<

TUNI NG

234>DARK

Caution: Since the printer’s paper setting is controlled by the host, the printer’s and host’s paper settings will

always be the same. If the printer’s setting is changed and is no longer the same as the host’s setting, the printer’s setting will automatically change to match the host’s setting.

1.6 Test Print Mode

1.6.1 Function

This mode enables the printer’s built-in test pattern (self-test pattern) to be printed at maximum speed. The self-test pattern is shown below.

Direction the paper is fed through the printer

Approx. 4mm

Approx. 4mm Approx. 4mm

127dots

(Paper)

About 127dots

1dot

About 1dot

* 1 The straight lines perpendicular to the direction that the paper is fed into the printer

A black line with a width of one dot is printed at 128 dots. (However, the straight line at the bottom of the page is not printed 128 dots from the previous line.)

* 2 The straight lines in the direction that the paper is fed into the printer

A black line with a width of about one dot is printed at about 128 dots. (However, the straight line at the right of the page is not printed 128 dots from the previous line.)

• About 1 dot: Since the horizontal and vertical widths of the dot is converted in the clock of the MCU PWB’s circuit, the actual distance between the lines is not 127 dots.

About 127dots

Approx. 4mm

About 1dot About 1dot

1dot

Resolution (DPI) 300

Width (mm) Approx. 24.8

– 63 –

MAINTENANCE GUIDE

1.6.2 Entering Test Print Mode

This mode is entered by pressing KEY 1 while turning the power switch ON and then releasing KEY 1 within three seconds. The LCD will display the following message.

Caution: The printer will enter user settings mode if KEY 1 is held down for more than three seconds.

After entering test print mode, message [1] is shown on the LCD while the printer is warming up. Message [2] is displayed when the printer is ready to print.

WA I T 0 0

000058

[1]

00 00 00

TEST

RDY 000058

[2]

00 00 00

TEST

“TEST” is shown on the bottom row of display when the printer enters test print mode. The number of test patterns printed (“000058”) increases by one each time a test pattern is printed. “00000000” shown on the display on the display does not mean anything and should be ignored.

Note 1: When test print mode is entered, the scanner motor in the ROS assembly begins running and continues

running at a fixed speed.

Note 2: The number of test patterns printed is displayed as a decimal number. After “999999” test patterns

have been printed, the display returns to “000000”.

1.6.3 Operation

1) After the printer is ready to print (when display [2] is shown), the printer will begin printing when KEY 0 is pressed

and will continue printing test patterns until it is stopped.

2) If KEY 0 is pressed while the test patterns are being printed, the printer will stop printing the test patterns after the

test pattern currently being printed has been generated.

3) If KEY 0 is pressed while the test patterns are not being printed, the printer will begin printing them and will continue

printing test patterns until it is stopped.

Warning: Print only after the covers have been properly installed.

1.6.4 Simple Test Print Mode

The printer is able to print the test print pattern (self-test pattern) without using the diagnostic tool.

Printing Procedure

1) Remove the rear cover. (Refer to Sec. 1.3 in Chapter 3, Replacement and Adjustment of Parts.)

2) Insert the EP cartridge and turn the power switch ON.

3) After the printer has finished warming up, connect PIN 1 and PIN 2 on the MCU PWB plug (P31).

Note: It is best to short circuit these pins using a screwdriver.

4) The printer will print one test pattern.

To print test patterns continuously, keep the pins (PIN 1 and PIN 2) on the MCU PWB plug (P31) connected.

– 64 –

MAINTENANCE GUIDE

1.7 Diagnosis Mode

1.7.1 Summary

This mode displays the counter, which counts the number of pages which are stored in the non-volatile memory and which will be printed, checks (using the input test) that the sensors and switches are functioning properly and checks the operation and function (using the output test) of each component (main motor, HVPS, etc.).

1.7.2 Different Types of Diagnosis Mode Operation

The diagnosis mode is able to perform the following three functions:

• Counter Display

• Input Test

• Output Test

(The output test is further divided into each output component.)

1.7.3 Entering Diagnosis Mode

This mode is entered by pressing KEY 0 while turning the power switch ON. The LCD will display the following message when diagnosis mode has been entered.

PRI NT CO SELECT IN

UNTER

GDG30

Diagnosis code

When diagnosis mode has been entered, the top row will display the type of the diagnosis code chosen and “DG” will be displayed in the bottom row followed by a two digit number representing the diagnosis code.

Note: If a paper jam occurs when the power supply is turned ON, diagnosis mode can still be entered.

However, diagnosis mode cannot be entered if an incorrect value is entered in ROM CHECK or RAM CHECK when the power supply is turned ON.

– 65 –

MAINTENANCE GUIDE

1.7.4 List of Diagnosis Codes

Diagnosis LCD Display

Code (Top Row)

Counter 30 PRINT COUNTER Displays the number of pages to be printed.

Input Test 02 SENSOR CHECK

07 FUSER TEMP. SET

08 FUSER TEMP.

80 SOLENOID TRAY0

90 MOTOR MAIN Operates the main motor in the drive assembly.

91 HVPS (C.ROLL AC)

Output

Test

92 HVPS (C.ROLL DC)

Shows whether or not the switches and sensors are operating properly.

Displays a temperature code corresponding to the temperature set in the fuser controller.

Displays a temperature code corresponding to the present temperature of the fuser.

Operates the feed solenoid in the input tray (for 0.5 seconds only).

The HVPS applies an AC voltage to the charge roller (CR).

The HVPS applies a DC voltage to the charge roller (CR).

Operation

93 HVPS (DEV.BIAS)

94 HVPS (T.ROLL –)

95 HVPS (T.ROLL +)

00 EXIT DIAG. Turns OFF the output test.

00 SIZE SENSOR The main function does not operate.

00 CHECK SUM Displays the SUM of the ROM.

Caution 1: Diagnosis code 00 (“EXIT DIAG.”) can only be used to stop diagnosing in output test mode; it cannot

be used to initiate diagnosis mode.

Caution 2 : Only the diagnosis codes that are described above can be executed.

The HVPS applies a –DC/AC voltage to the magnetic roller (DB).

The HVPS applies a –DC voltage to the bias transfer roller (TR(–)).

The HVPS applies a +DC voltage to the bias transfer roller (TR(+)).

– 66 –

MAINTENANCE GUIDE

1.7.5 Diagnosis Code Selection

When diagnosis mode is entered, diagnosis code 30 is the first code displayed. Each time KEY 1 is pressed, the diagnosis code changes according to the order shown in section 1.7.4 List of Diagnosis Codes.

DG 30

DG 02

DG 07

DG 08

DG 80

DG 90

DG 91

KEY1 ON

DG 00

KEY1 ON

DG 00

KEY1 ON

DG 00

KEY1 ON

DG 95

KEY1 ON

DG 94

KEY1 ON

DG 93

KEY1 ON

DG 92

Caution: When diagnosis code 02 (input test mode) is being executed, KEY 0 cannot be used to choose another

diagnosis code since it has another function under diagnosis code 02. When a diagnosis code other than code 02 (input test mode) is being executed, another diagnosis code can be chosen by pressing KEY 0.

1.7.6 Input Test (Diagnosis Code 02 (“SENSOR CHECK”))

(1) Function

Each time a sensor or switch is turned ON, the (two-digit, decimal number) number on the bottom right of the LCD is increased by one. This number allows you to verify that the switch and sensors are functioning properly.

(2) Operation

After entering diagnosis mode and choosing diagnosis code 02 with KEY 1, press KEY 0 to begin the check to determine whether the switch and sensors are operating correctly. Press KEY 0 to stop the diagnosis and return to the initial display shown when diagnosis code 02 was chosen.

(3) LCD Display (4) Verification

This code artificially turns on the switch and sensors, counts the number of switches and sensors that turned on and displays this number in the bottom right corner. The following switches and sensors are checked:

• Interlock Switch • CRU Sensor • Pre-regi. Sensor •Exit Sensor

Warning: Do not turn on the interlock switch and the LD switch (on the CRU sensor PWB) at the same time

while making a diagnosis with the front cover assembly open since the laser beam may be emitted. If the two switches must be turned on at the same time, be sure to disconnect the connector (P/J171) from the CRU sensor PWB or the connector (P/J12) from the MCU PWB.

SENSOR C SELECT IN

SENSOR C EXECUTIN

– 67 –

HECK GDG02

KEY0 ON

HECK GDG00

Each time a switch or sensor is turned ON, the (two-digit, decimal number) increases by one.

MAINTENANCE GUIDE

1.7.7 Output Tests

(1) Function

The output test mode has two functions.

• To display the temperature set in the fuser controller and the present temperature in the fuser.

• To operate each output components.

(2) Operation

After entering diagnosis mode and choosing the desired diagnosis code with KEY 1, begin the diagnosis by pressing KEY 0. To stop diagnosing in output test mode, choose diagnosis code 00 (“EXIT DIAG.”) and then press KEY 0.

Warning 1: Do not turn on the interlock switch and the LD switch (on the CRU sensor PWB) at the same time

while checking with the front cover assembly open since the laser beam may be emitted. If the two switches must be turned on at the same time, be sure to disconnect the connector (P/J171) from the CRU sensor PWB or the connector (P/J12) from the MCU PWB.

Warning 2: When executing diagnosis code 90, do not try checking the drive since the main motor will be running.

Warning 3: Since a high voltage is generated by the HVPS while executing diagnosis codes 91 ~ 95, do not touch

any high voltage components. Be sure to correctly follow the procedure in this manual when executing diagnosis codes 91 ~ 95.

Caution 1: To stop diagnosing in output test mode, turn OFF the interlock switch.

Caution 2: When executing diagnosis code 80, the diagnosis will only take 0.5 seconds and will automatically

stop.

Caution 3: More than one diagnosis can be executed in output test mode simultaneously.

Caution 4: If diagnosis code 07, 08, 00 (“SIZE SENSOR”) and 00 (“CHECK SUM”) is chosen in output test

mode, the diagnosis will automatically begin as soon as the diagnosis code is chosen.

Caution 5: If diagnosis code 07, 08, 00 (“SIZE SENSOR”) and 00 (“CHECK SUM”) is being executed in output

test mode and the counter or input test diagnosis is started or stopped, the diagnosis in output test mode will automatically stop.

– 68 –

(3) LCD Display

(An example of diagnosis code 90)

MAINTENANCE GUIDE

MOT OR MA

SELECT IN

MOT OR MA

EXECUTIN

HVPS(C .ROLL AC) EXECUTING DG 91

EXI T DIAG. EXECUTING DG 00

EXI T DIAG. SELECT ING DG 00

GDG90

KEY0 ON

GDG90

KEY1 ON

KEY0 ON

Warning: If the counter or input test diagnosis is started or stopped while executing one of the diagnosis codes

(90 ~ 95), the diagnosis code (90 ~ 95) will continue being executed even though “EXECUTING”, shown on the bottom row, changes to “SELECTING”.

– 69 –

MAINTENANCE GUIDE

(4) Verification

• Diagnosis code 07 (“FUSER TEMP. SET”)

This code verifies the temperature code (corresponding to the temperature set in the fuser controller) displayed on the bottom right (two-digit, desplayed as a hexadecimal number) of the LCD.

FUSER TE EXECUTIN

MP . SET GDGC6

“C6” is displayed when the data in non-volatile code 9 is set to “8”. Refer to section 3.3.5 List of Temperature Codes for fuser temperatures and temperature codes. A comparison of the non-volatile code 9 data (refer to section 1.8 Non-volatile Setting Mode) and the temperature codes is shown below.

Non-volatile Code 9 Data

0EE 1E9 2E4 3DF 4DA 5D5 6D0 7CB

Temperature Code

Non-volatile Code 9 Data

8C6

9C1 ABC BB7 CB2 DAD

EA8 FA3

Temperature Code

“8” (C6) is the default setting.

• Diagnosis Code 08 (“FUSER TEMP.”)

This code verifies the temperature code (corresponding to the present temperature of the fuser) displayed on the bottom right (two-digit, desplayed as a hexadecimal number) of the LCD. Refer to section 3.3.5 List of Temperature Codes for fuser temperatures and temperature codes.

Note: To set the temperature of the fuser controller (refer to section 3.3 Fuser Controller), first enter

diagnosis mode and execute diagnosis code 08, then change the temperature code.

• Diagnosis Code 80

This code allows you to check (visually or by the sound it makes) the operation of the solenoid with each diagnosis code.

• Diagnosis Code 90 (“MOTOR MAIN”)

This code allows you to check (visually or by the sound it makes) the operation of the main motor in the drive assembly.

Warning: While executing diagnosis code 90, do not try checking the drive since the main motor will be running.

• Diagnosis Codes 91 to 95

91: A high AC voltage is applied to the CR by the HVPS. 92: A high DC voltage is applied to the CR by the HVPS. 93: A high DC voltage is applied to the magnetic roller by the HVPS. 94: A high negative DC voltage is applied to the BTR by the HVPS. 95: A high positive DC voltage is applied to the BTR by the HVPS.

Caution: Refer to 5.2 Wiring Diagram of Connections Between Parts, §5. [MCU PWB ↔ HVPS ↔ EP Toner

Cartridge, Fan] for output voltages.

Warning: Since a high voltage is generated by the HVPS while diagnosis codes 91 ~ 95 are being executed, do

not touch any high voltage components.

– 70 –

MAINTENANCE GUIDE

PRI NT CO SELECT IN

UNTER GDG30

KEY0 ON

SENSOR CHECK

KEY1 ON

PRI NT CO 123456

UNTER

DG 30

SELECT ING DG 02

1.7.8 Counter (Diagnosis Code 30 (“PRINT COUNTER”))

(1) Function

A six-digit, (displayed as a decimal number) is displayed indicating the number of pages that are waiting in the nonvolatile memory to be printed.

(2) Operation

After entering diagnosis mode and choosing diagnosis code 30 with KEY 1 (diagnosis code 30 is automatically chosen when diagnosis mode is first entered), the print counter will be displayed if KEY 0 is pressed. Press KEY 0 again to return to the initial display shown when diagnosis code 30 was chosen.

If KEY 1 is pressed while the print counter is displayed, diagnosis code 30 will stop and diagnosis code 02 will be chosen.

Caution: The print counter can also be stopped by turning the interlock switch off.

(3) LCD Display

(The example shows 123456 on the print counter.)

Note: An increase in the print counter turns the feed solenoid signal ON.

The print counter will continue to increase even if a paper jam occurs.

1.8 Non-volatile Settings Mode

1.8.1 Function

This mode allows you to set or determine the values for the resolution and the registration marks when they differ from those set in the specifications in the non-volatile memory.

Caution: Since the data in the non-volatile memory is closely related to both the operation and functions of the

printer, be extremely careful when changing the data after it has been set since incorrectly setting the data can cause many problems.

1.8.2 Entering Non-volatile Settings Mode

1) Turn the power switch ON while pressing both KEY 0 and KEY 1.

2) While keeping KEY 1 pressed down, release the SET.KEY (KEY 0). The LCD will appear as shown below and for every second that the key is held down, the number in the bottom row will move one position to the right and increase by one.

– 71 –

MAINTENANCE GUIDE

RELEASE0THE KEY

3) When the number in the bottom row reaches “3”, KEY 1 should be released and non-volatile settings mode will be entered.

RELEAS THE KEY

KEY1 ON

CONF I GER

SELECT3N

“NV”, indicating that non-volatile settings mode has been entered, is displayed on the bottom row of the LCD and a two-digit number will appear on the bottom right. The left number “0” indicates which non-volatile code has been chosen and the right number “4” is the non-volatile code data.

ATION

GNV05

Data

Non-volatile code

Note 1: If KEY 1 is not released when the number reaches “3”, the number will continue increasing by one

for every second that the key is pressed down. After the number reaches “9”, it will return to “0”.

Caution: If KEY 1 is released before or after the number reaches “3”, the power supply will be turned OFF and

the operation must be restarted.

Note 2: If a paper jam occurs when the power switch is turned ON, non-volatile settings mode can be entered.

However, non-volatile settings mode cannot be entered if an incorrect value is entered in ROM CHECK or RAM CHECK when the power supply is turned ON.

– 72 –

1.8.3 List of Non-volatile Codes

MAINTENANCE GUIDE

Non-

volatile

Code

LCD Display (shown on the top row of the display)

Data [Preset Value]

Function Details

CONFIGURATION 0 ~ F (16 levels) [Preset Value ____ ]

Sets the configuration. A value from 0 to F (hexadecimal number) is

entered as a binary number and represents b3, b2, b1 or b0. The information for each bit is shown below. b0: Paper Size Specifications (0: For domestic use, 1: For overseas use) b1, b2, b3: NA (010: Fixed)

RESOLUTION 0 ~ 8 (9 levels) [Preset Value 1]

Sets the resolution. 1: 300dpi

LD_POWER 0 ~ 4 (5 levels) [Preset Value 2]

Adjusts the output of the laser diode. 0 indicates the lowest output for the laser

diode and the faintest print density. 4 indicates the highest output for the laser diode and the darkest print density.

Can the

setting be

changed ?

Possible/ Not

Possible

Not possible

TR PLUS CONTROL 0 ~ F (16 levels) [Preset Value 0]

Adjusts the TR output. 0 indicates the auto mode.

REG. PROSESS 0 ~ F (16 levels) [Preset Value 8]

Adjusts the registration marks at the top and bottom of the page.

0 indicates that the minimum amount of blank space will be left at the top and bottom of the page and F indicates that the maximum amount of blank space will be left at the top and bottom of the page.

• Changes in 0.56 mm increments.

E2 JAM DETAIL 1 ~ 3 (3 levels) [Preset Value ____ ]

Sets the timing for the JAM. 1: Initial Reg On

2: Very fast paper jam 3: Very slow paper jam

Not possible

Possible

Not possible

– 73 –

MAINTENANCE GUIDE

REG. SCAN 0 ~ 8 (9 levels) [Preset Value 4]

Adjusts the registration marks at the top and bottom of the page.

FUSER TEMP. SET 0 ~ F (16 levels) [Preset Value 8]

Sets the temperature of the fuser con-

troller.

Sets the paper size for the input tray. (Refer to section 3.1 Paper Size Controller.)

INPUT TRAY SIZE 0 ~ F (16 levels) [Preset Value ____ ]

I/F OPTION 0 ~ F (16 levels) [Preset Value 0]

0 indicates that the minimum amount of blank space will be left on the left side of the page and 8 indicates that the maximum amount of blank space will be left on the left side of the page.

• Changes in 4C increments. (There are 5 levels within each temperature code.)

0 indicates that the fuser controller will be set at the lowest temperature and F indicates that the fuser will be set at the highest temperature.

• Changes in 4C increments. (There are 5 levels within each temperature code.)

Possible

Not possible

Possible

Sets special interface specifications. A value from 0 to F (hexadecimal number) is

entered as a binary number and is shown as

Caution 1: The non-volatile code can only be changed if it is possible to change the settings.

If the table shows that it is “Not Possible” to change the settings, then the settings cannot be changed and are determined by the setting in the OEM. If it is “Possible” to change the settings, be sure the settings are changed correctly.

Caution 2: The settings for non-volatile codes not mentioned in the table above cannot be changed.

Note: Non-volatile code A has the same function as the input tray paper setting in user settings mode.

Entering the settings in user settings mode is easier than using the non-volatile mode to make these settings.

b3, b2, b1 or b0. The information for each bit is shown below. b0, b1, b2: NA (000: Fixed) b3: Counter is displayed, TEST flag (0: Invalid, 1: Valid)

Not possible

– 74 –

MAINTENANCE GUIDE

1.8.4 Non-volatile Code Selection

Non-volatile code 0 is automatically chosen after non-volatile settings mode has been entered. Each time KEY 1 is pressed, the non-volatile code changes according to the order shown in section 1.8.3 List of Non-volatile Codes. Use this key to select the appropriate non-volatile code. “SELECTING” is displayed in the bottom row of the LCD followed by the chosen non-volatile code.

NV 0?

KEY1 ON

NV 1?

KEY1 ON

NV 2?

KEY1 ON

NV F?

1.8.5 Setting the Data

After the non-volatile code has been chosen, “SELECTING” will change to “WRITING” when KEY 0 is pressed and the value will increase by one. The data is entered in non-volatile memory at the same time that it is set. Set the data by pressing the SET.KEY (KEY 0) until the desired value is displayed. If KEY 0 is pressed when the data is at its maximum value, the data value will return to its minimum, 0.

(Example for Non-volatile Code 2)

KEY1 ON

NV 22

NV 23

NV 24

NV 20

NV 21

KEY0 ON

– 75 –

MAINTENANCE GUIDE

2. ERROR/STATUS

This printer is able to detect 10 different printer error conditions. The error/status code corresponding to each one is described below.

2.1 List of Error/Status Codes

Error/Status Code LCD Display Details

U6 U6:POWER OFF The non-volatile memory is malfunctioning.

THEN ON AGAIN

U2 U2:POWER OFF The malfunction is related to the ROS.

THEN ON AGAIN

U4 U4:POWER OFF The malfunction is related to the fuser.

THEN ON AGAIN

E5 CLOSE The front cover assembly is open.

FRONT COVER

E4 E4:OPEN COVERS A paper jam has occurred in the exit sensor section.

CLEAR PAPER JAM (EXIT JAM)

E3 E3:OPEN COVERS A paper jam has occurred between the pre-regi. sensor

CLEAR PAPER JAM and the exit sensor. (PRE-REGI. JAM)

E2 E2:OPEN COVERS A paper jam has occurred between the input tray and the

CLEAR PAPER JAM pre-regi. sensor. (Very fast paper jam, Misfeed jam)

J3 EP CARTRIDGE The EP toner cartridge is not installed.

NOT IN POSITION

P1 FUSER PAUSE MODE A FUSER PAUSE command is being received in on-line

mode.

CX PAPER SIZE ERROR The paper size set in non-volatile mode differs from the size

of the paper that is being fed into the printer.

*: “READY TO PRINT” is displayed every five seconds.

– 76 –

MAINTENANCE GUIDE

*Error messages on host computer (Printer Status Display of printer driver for the Windows) correspond the Error/ Status Code in Diagnostic tool as follows.

The indication on the LCD screen of Diagnostic tool altrnates between “RDY” and LCD display of Diagnostic tool at five sconds intervel.

Error messages Error/Status LCD display of of printer driver Code Diagnostic tool

“NV-RA M Abnormality” U6 U6:POWER OFF

THEN ON AGAIN

“Scanner Abnormality” U2 U2:POWER OFF

THEN ON AGAIN

“Fuser Abnormality” U4 U4:POWER OFF

THEN ON AGAIN

“Cover Open” E5 CLOSE

FRONT COVER

“Paper Jam” E4 E4:OPEN COVERS

CLEAR PAPER JAM

“Paper Jam” E3 E3:OPEN COVERS

CLEAR PAPER JAM

“paper Out Miss feed” E2 E2:OPEN COVERS

CLEAR PAPER JAM “EP (Toner) cartridge missing J3 EP CARTRIDGE or Installed incorrectly” NOT IN POSITION

P1 FUSER PAUSE MODE

CX PAPER SIZE ERROR

– 77 –

MAINTENANCE GUIDE

2.2 Error/Status Code Search and Operation

Code

Cause

1. An error occurred when data was entered in the non-volatile memory while the power supply switch was ON.

2. An error occurred when data was entered in the non-volatile memory.

1. After the ROS began warming up, there was a break (even as little as 20 seconds) in the SOS signal that was longer than the standard READY value.

2. After the ROS began warming up, the laser diode output did not attain the value that was set (non-volatile memory data) while the laser beam was being emitted.

3. After the ROS finished warming up, there was a break in the SOS signal that was longer than the standard FAIL value.

(Refer to section 3.2 ROS Controller for these values.)

Operation

Clearing the Display

After cycling down, the main motor, ROS controller and fuser controller will stop running.

Turn the power supply switch OFF, then ON again.

After cycling down, the main motor, ROS controller and fuser controller will stop running.

Turn the power supply switch OFF, then ON again.

1. After the fuser finished warming up, the temperature in the fuser was lower than the minimum safe temperature.

2. The fuser was not able to finish warming up within 120 seconds.

3. A discontinuity in the fuser assembly thermistor was detected.

4. The temperature in the fuser was higher than the maximum safe temperature.

5. After the fuser finished warming up, the heater rod in the fuser assembly was on (it lit up) for 10 seconds after the main motor had stopped.

(Refer to section 3.3 Fuser Controller for temperatures.)

The interlock switch is turned off.

After cycling down, the fuser controller will immediately stop running, then the main motor and the ROS controller will stop.

Turn the power supply switch OFF, then ON again.

Immediately stop the fuser controller, the main motor and the ROS controller.

Turn the power supply switch OFF, then ON again.

– 78 –

Code

Cause

1. The exit sensor was left on and was not turned off between the time the pre-regi. sensor was turned on and the end of the regulation time.

2. The exit sensor was turned on while the power switch was ON.

3. The exit sensor was turned on while the interlock switch was ON.

4. The exit sensor was turned on during warm up or during the ERASE cycle.

(Refer to section 3.5 Paper Feed Regulation Time.)

MAINTENANCE GUIDE

Operation

Clearing the Display

The main motor, the ROS controller and the fuser controller will immediately stop running. *1 However, when the size of the paper fed into the printer is larger than a paper size that can be identified by the printer, the main motor will be stopped after the paper is fed through the printer.

After opening the front cover assembly and removing the paper, close the front cover assembly.

The exit sensor was not turned on between the time that the pre-regi. sensor was turned on and the end of the regulation time. (Refer to section 3.5 Paper Feed Regulation Time.)

1. The pre-regi. sensor was turned on between the time that the paper was fed into the printer until and the end of the regulation time. (Very fast paper jam)

2. The pre-regi. sensor was not turned on from the time that the paper was fed into the printer until after the regulation time had passed. (Misfeed jam)

3. The pre-regi. sensor was turned on while the power switch was ON.

4. The pre-regi. sensor was turned on while the interlock switch was ON.

5. The pre-regi. sensor was turned on during warm up or during the ERASE cycle.

(Refer to section 3.5 Paper Feed Regulation Time.)

The main motor, ROS controller and fuser controller will immediately stop running. *1

After opening the front cover assembly and removing the paper, close the front cover assembly.

The main motor, ROS controller and the fuser controller will immediately stop running. *1

After opening the front cover assembly and removing the paper, close the front cover assembly.

*1: If a paper jam occurs within 3.2 seconds after the solenoid begins operating, all other parts will immediately

stop running and the main motor will stop running after 3.2 seconds.

– 79 –

MAINTENANCE GUIDE

Code

The CRU switch is not turned on.

The fuser pause command is being received and the

fuser controller stops operating.

Operation

Cause

Clearing the Display

The main motor, ROS controller and fuser controller will immediately stop running.

Install an EP toner cartridge.

The ROS controller and the fuser controller will immediately stop running.

1. Turn the power switch OFF, then ON again.

2. Send the RESET PAUSE FUSER command.

– 80 –

MAINTENANCE GUIDE

2.3 Error/Status Code Display

The following table shows whether it is possible for the error/status codes to be displayed on the LCD in each operating mode.

Operating Mode

On-line Mode VVVVVVVVVV

User Settings Mode V22V222222

Test Print Mode VVVVVVVV2V

Diagnosis Mode

(while not diagnosing)

Diagnosis Mode

(while the counter is displayed)

Diagnosis Mode

(while diagnosing in input test mode)

Diagnosis Mode

(while diagnosing in output test mode)

Non-volatile Settings Mode

(while a non-volatile code is being chosen)

Non-volatile Settings Mode

(while the non-volatile data is being chosen)

Error/Status Code

U6 U2 U4 E5 E4 E3 E2 J3 P1 CX

222V222222

2222222222

222V222222

2 ∂∂ ∂∂ V222∂∂2∂∂

V22V222222

Non-volatile Settings Mode

(while printing the test pattern in non-volatile code G)

V : Displayed, ∂∂ : Displayed for only two seconds, 2 : Not displayed

VVVVVVVV2V

– 81 –

MAINTENANCE GUIDE

3. CONTROLLERS

3.1 Paper Size Controller

Data for non-volatile code A regarding paper size is shown below.

Paper Size Non-volatile Code A

UNIVERSAL 1

MONARCH 2

LEGAL 13" 9

POSTCARD *1 B

COM-10 F

A4(SEF) 4

C5 E

DL D

EXECUTIVE(SEF) 5

B5(SEF) A

LEGAL-14" 8

A5(LEF)

[STATEMENT(LEF)]*2

LETTER(SEF) 6

A5(SEF) 7

SEF: Short Edge Feed (length) LEF: Long Edge Feed (width)

*1: The printer and the host computer can not support

“POST CARD” as a paper setting. This is only displayed when the diagnosic tool is being used and the data for non-volatile code A is being displayed. “POST CARD” can not be chosen as a non-volatile code data setting.

*2: STATEMENT(LEF) is for use in the U.S.

– 82 –

MAINTENANCE GUIDE

3.2 ROS Controller

3.2.1 Scanner Motor Operation

The ON/OFF control of the scanner motor in each operating mode is shown below.

Operating Mode ON/OFF Status of the Scanner Motor

On-line Mode MCU PWB

User Settings Mode Normally turned OFF.

Test Print Mode When the power is turned ON, the scanner motor begins running

at the same time and remains ON.

Diagnosis Mode Normally turned OFF.

Non-volatile Settings Mode ModeWhen the power is turned ON, it begins running at the same

time and remains ON.

The speed of the scanner motor displayed below is equal to the resolution which differs from that in the printer’s specifications.

Resolution Speed

300 dpi 4075 rpm

dpi (dots per inch)

rpm (revolutions per minute)

3.2.2 ROS Warm Up

The scanner motor is rotating as the ROS begins warming up. When the break in the SOS signal is shorter than the standard READY value three times in succession, the ROS will terminate its warm up operation. (The scanner motor continues rotating at a constant speed.)

3.2.3 Standard ROS Values

Standard ROS Values Details

Standard READY Value A break in the SOS signal equal to more than 98% of the specified speed

of the scanner motor

Standard FAIL Value A break in the SOS signal equal to less than 90% of the specified speed

of the scanner motor

Note: Runaway of the scanner motor, in response to an increase in speed of over 1%, prevents the laser beam

from entering the SOS sensor. When the standard FAIL value is not attained, a U2 error message is displayed.

– 83 –

MAINTENANCE GUIDE

3.3 Fuser Controller

3.3.1 Setting the Fuser Controller

The heater rod in the heater assembly is controlled according to the temperature set in the fuser controller. When the ROS is warming up and the main motor stops running, the standby temperature is used as the fuser controller temperature. When the main motor is running (during printing or during the ERASE cycle, but not while it is warming up), the running temperature is used as the fuser controller temperature.

3.3.2 ON/OFF Controller for the Heater Rod

The ON/OFF control of the heater rod is executed according to the following rules:

• When the fuser controller temperature is less than –2°C (the fuser ON temperature), the heater rod is turned ON.

• When the fuser controller temperature is greater than 0°C (the fuser OFF temperature), the heater rod is turned OFF.

3.3.3 Fuser Warm up

The heater rod is turned ON (it lights up) at the same time that the fuser begins warming up. After the temperature on the back of the heat roller (the temperature detected by the thermistor in the fuser assembly) reaches the fuser controller temperature (standby temperature), the fuser will stop warming up. The main motor operates while the fuser is warming up.

3.3.4 List of Fuser Temperatures

Temperature

Maximum safe temperature Approx. 175°C (standby temperature + approx. 35°C)

Fuser OFF temperature Fuser controller temperature ±0°C

Fuser controller temperature*1 Standby temperature: 140°C

Running temperature: 150°C (uniform)

Fuser ON temperature Fuser controller temperature – approx. 2°C

Minimum safe temperature Approx. 115°C (standby temperature – approx. 25°C)

*1: Changes according to the data in the non-volatile memory.

The temperatures described above are displayed when the value of non-volatile code 9 is set to 8.

– 84 –

3.3.5 List of Temperature Codes

MAINTENANCE GUIDE

Fuser

Temperature

Temperature Code (HEX)

0°CFF 10°CFF 20°C FF (FE~FF) 30°C FE (FD~FE) 40°C FD (FC~FD) 50°C FC (FB~FC) 60°C FA (F9~FB) 70°C F7 (F6~F8) 80°C F4 (F3~F5) 90°C F0 (EE~F1)

100°C EA (E8~EC) 110°C E3 (E1~E6)

Fuser

Temperature

Temperature Code (HEX)

140°C C6 (C2~C9) 145°C C0 (BC~C3) 150°C B9 (B6~BD) 155°C B3 (AF~B6) 160°C AC (A8~AF) 165°C A5 (A1~A9) 170°C 9E (9A~A2) 175°C 97 (92~9B) 180°C 8F (8B~94) 190°C 81 (7C~86) 200°C 74 (6E~79)

210°C 67 (61~6C) 120°C DB (D8~DE) 130°C D1 (CE~D4)

(HEX)

220°C 5B (55~60)

230°C 50 (4A~55)

(°C)

0 30 60 90 120 150 180 210 240

– 85 –

MAINTENANCE GUIDE

3.4 Erase Cycle

When the printing operation is interrupted due to a paper jam or due to the interlock switch or the power being turned OFF, an ERASE cycle is executed in the initial recovery (when the interlock switch or the power is turned ON). In the ERASE cycle, the main motor operates and outputs CR (DC) and TR(–) in the HVPS.

Caution 1: The ERASE cycle is stopped by turning the interlock switch to OFF or by activating the exit sensor.

The ERASE cycle is resumed when the interlock switch or the power is turned ON.

Caution 2: An ERASE cycle is not executed if the pre-regi. sensor or the exit sensor is turned ON during recovery

(when the interlock switch or the power is turned ON).

– 86 –

MAINTENANCE GUIDE

3.5 Paper Feed Regulation Time

The regulation times for detecting a paper jam are shown below. However, when the timing to turn on the pre-regi. sensor is, at a maximum, 0.25 sec slower then all components after the second pre-regi. sensor will be 0.25 sec slower.

(1) E4 Regulation Time

Type of Paper E4 Regulation Time

Paper with a length less than A4SEF 20.06 sec

Paper with a length greater than A4SEF 24.88 sec

OFF

 PRE-REGI. SENSOR

ON



OFF

EXIT SENSOR

(2) E3 Regulation Time

E3 Regulation Time

6.92 sec

 PRE-REGI. SENSOR

EXIT SENSOR

OFF

ON

OFF

E3

regulation

time

E4 regulation time Paper jam

Paper jam

– 87 –

MAINTENANCE GUIDE

(3) E2 Regulation Time

E2-1 Regulation Time (Fast Jam)

0.979 sec

E2-2 Regulation Time (Misfeed jam)

2.177 sec

 FEED SENSOR

PRE-REGI. SENSOR

E2-1 regulation time

OFF

ON

OFF

Paper

jam

E2-2 regulation time

Paper jam

– 88 –

MAINTENANCE GUIDE

4. ARRANGEMENT OF THE CONNECTORS [P (PLUG)/J (JACK)]

4.1 P/J Schematic Diagram

131

132

BCDEFGHI JKL

181

114

121

122

123

171

151

152

321

112

111

BCDEFGHI JKL

– 89 –

MAINTENANCE GUIDE

4.2 List of P/J Connectors

The coordinates of the connectors (P/J) shown below correspond to 4.1 P/J Schematic Diagram.

P/J

11 G12 Connects the MCU PWB to the LVPS assembly.

12 G13 Connects the MCU PWB to the ROS harness assembly.

13 H13 Connects the MCU PWB to the exit and thermistor harness assembly.

14 H13 Connects the MCU PWB to the main motor.

15 H12 Connects the MCU PWB to the HV harness assembly.

16 H13 Connects the MCU PWB to the feed solenoid.

17 H13 Connects the MCU PWB to the CRU harness assembly.

18 H13 Connects the MCU PWB to the P/H harness assembly.

31 G13 Connects the MCU PWB to Y-DEBUG.

32 G13 Connects the MCU PWB to the LED harness assembly.

111 F12 Connects the LVPS assembly to the MCU PWB.

112 D12 Connects the LVPS assembly to the AC fuser harness assembly.

Coordinates

Connections

114 I4 Connects the fuser assembly to the AC fuser harness assembly.

121 F5 Connects the LD to the ROS harness assembly.

122 G5 Connects the ROS motor to the ROS harness assembly.

123 H6 Connects the SOS to the ROS harness assembly.

131 D4

132 E4 Connects the exit sensor to the exit and thermistor harness assembly.

151 F12 Connects the MCU PWB to the HVPS.

152 F11 Connects the HVPS to the fan.

171 E11 Connects the CRU sensor to the CRU harness assembly.

181 F3 Connects the pre-regi. sensor to the P/H harness assembly.

321 I10 Connects the LED PWB to the LED harness assembly.

Connects the thermistor in the fuser assembly to the exit and thermistor harness assembly.

– 90 –

5. WIRING DIAGRAM CONNECTIONS

5.1 Wiring Diagram of General Connections

MAINTENANCE GUIDE

HEATER

ROD

PL 3.2

FUSER ASSY

PL 3.1

EXIT SENSOR

PL 3.16

P/J132

P/J181

PRE-REGI.

SENSOR

PL 2.7

THERMAL

FUSE

PL 3.13

THERMISTER

PL 3.15

P/J131

SOLENOID

THERM

OSTAT PL 3.14

FEED

PL 2.10

P/J114 P/J112

P/J11

MCU PWB

PL 5.1

P/J13

P/J18

P/J31

LVPS ASSY

PL 5.2

P/J111

CENTRONICS CONNECTOR

P/J121P/J12P/J16

P/J122

P/J123

POWER SUPPLY CORD

ROS ASSY

PL 4.6

EP TONER CARTRIDGE

PL 1.11

DRIVE ASSY

PL 2.13

: Indicates the connections made by the harness.

FEEDER ASSY

PL 2.1

BCR

BTR

P/J15

P/J151

HVPS

PL 4.1

P/J14

P/J32

P/J171P/J17

P/J152

CPU SENSOR PWB

PL 4.2

MAIN MOTOR

PL 2.14

P/J321

LED PWB

PL 1.5

FAN

PL 1.9

GREEN

LED

ORENGE

ROS ASSY

PL X.Y

Indicates the name of the part. Indicates item Y in PL X in Chapter 6, Parts List.

– 91 –

MAINTENANCE GUIDE

5.2 Wiring Diagram of Connections Between Parts

5.2.1 Operation

The wiring diagram is divided into 9 sections in order to show detailed connections between the parts.

§1. [LVPS Assembly ↔ MCU PWB]

• Connections between the LVPS assembly and MCU PWB

§2. [LVPS Assembly ↔ Fuser Assembly]

• Connections between the LVPS assembly and the fuser assembly

§3. [MCU PWB ↔ ROS Assembly]

• Connections between the MCU PWB and the ROS assembly

§4. [MCU PWB ↔ Main Motor]

• Connections between the MCU PWB and the main motor

§5. [MCU PWB ↔ HVPS ↔ EP Toner Cartridge, Fan]

• Connections between the MCU PWB and the HVPS

• Connections between the HVPS and the EP toner cartridge

• Connections between the HVPS and the fan

§6. [MCU PWB ↔ Exit Sensor, Thermistor]

• Connections between the MCU PWB and the exit sensor

• Connections between the MCU PWB and the thermistor

§7. [MCU PWB ↔ Pre-regi. Sensor, Feed Solenoid]

• Connections between the MCU PWB and the pre-regi. sensor

• Connections between the MCU PWB and the feed solenoid

§8. [MCU PWB ↔ CRU Sensor PWB]

• Connections between the MCU PWB and the CRU sensor PWB

§9. [MCU PWB ↔ LED PWB]

• Connections between the MCU PWB and the LED PWB

– 92 –

5.2.2 Symbols used in the wiring diagram for the part connections:

Explanation

MAINTENANCE GUIDE

MCU PWB

PL X.Y

MAIN MOTOR

220V MODEL

P/J11

– X

24VDC

Indicates the name of the part listed in Chapter 6, Parts List and denotes item Y in section PLX of that chapter.

Indicates the functioning component in the part and denotes its name.

Indicates information differing from the specifications and denotes the relevant specification.

P, –: Indicates the plug on the connector.

J, , : Indicates the jack on the connector.



X: Indicates the PIN no. for the connector.

Indicates a connection between wires.

Indicates a connection differing from the specifications.

Indicates a connection to a screw.

Indicates a wiring connection and denotes its signal wire name and details.

HEATER ROD ON(L) 4.2VDC

5VDC

SG, FG, RTN

Indicates the function and logical value (low: L, high: H) of the operating signal and denotes the voltage when the signal is high (H).

Indicates the DC voltage when the negative end is connected to an SG.

SG: Indicates a signal ground. FG: Indicates a frame ground. RTN: Indicates a return.

There is conductivity between SG and RTN. In addition, according to the specifications, FG and SG can be either connecting or separating pins.

Indicates information relating to that section.

– 93 –

MAINTENANCE GUIDE

§1. [LVPS Assembly ↔ MCU PWB]

LVPS ASSY

PL 5.2

J111 1 2 3 4 5 6 7

MCU PWB

PL 5.1

J11 – – – – – – –

HEATER ROD ON(L) 4.38VDC

RTN

24VDC

5VDC 5VDC

SG SG

–

1

–

2

–

3

–

4

–

5

–

6

–

*1: Short circuit prevention of voltages output from the LVPS assembly

Short Circuit Output

5VDC × B × B

24VDC × A × A

× : There is no output when a short circuit occurs.

× A: The conductivity returns to normal after the short circuit has been remedied. × B: The conductivity returns to normal after the short circuit has been remedied,

the power is turned OFF for two to three minutes and the power is turned back ON.

Output Status

5VDC 24VDC

– 94 –

§2. [LVPS Assembly ↔ Fuser Assembly]

LVPS ASSY

PL 5.2

MAINTENANCE GUIDE

FUSER ASSY

PL 3.1

100V MODEL

MAIN POWER

SWITCH

⊃ ⊃ ⊃

P/J112

1 2 3

P/J114 – – –

AC L

AC N

1

–

2

–

–

220V MODEL

P/J114

–

1

–

2

–

⊃ ⊃ ⊃

⊃

THERMOSTAT

⊃ ⊃

HEAT ROLLER

THERMAL

FUSE

HEATER ROD

Signal Wire Name Reference

AC N Neutral side of the AC input from the power supply

AC L Line side of the AC input from the power supply

*1: Temperature of the thermostat when the point of contact is open: contact temperature 125°C (Non-touch type) *2: Rated power of the heater rod

100V Model: 320 ± 16W(115V), 220V Model: 320 ± 16W(220V)

*3: Resistance of the thermistor

Temperature (°C) 10 20 30 140 160

Resistance (KΩ) 428.5 270.4 174.7 4.129 3.178

– 95 –

MAINTENANCE GUIDE

§3. [MCU PWB ↔ ROS Assembly]

MCU PWB

PL 5.1

– – – – – – –

– – –

– – – – –

P/J12

1 2 3 4 5 6 7

8 9

11 12 13 14 15

⊃ ⊃ ⊃ ⊃ ⊃ ⊃ ⊃

⊃ ⊃ ⊃

⊃ ⊃

SCANNER MOTER ON(L) 4.1VDC

⊃ ⊃ ⊃

5VDC-LD

5VDC

SG VL1 VL2 MO

DATA

SOS

5VDC

FGS

RTN

24VDC-l/L

P/J121

⊃

7

⊃

6

⊃

5

⊃

4

⊃

3

⊃

2

⊃

P/J123

⊃

3

⊃

2

⊃

P/J122

⊃

5

⊃

4

⊃

3

⊃

2

⊃

– – – – – – –

– – –

– – – – –

ROS ASSY

PL 4.6

LD ASSY

SOS PWB

SCANNER ASSY

Signal Wire Name Reference

DATA This signal causes the LD to be emitted from the MCU PWB to the LD assembly. (LD

ON(L) 3.7VDC)

MO This signal monitors the output in the LD based on the DATA signal. (Use to adjust the

output of the LD.)

VL2, VL1 This signal adjusts the output of the LD.

5VDC-LD This signal conducts the LD voltage of the LD assembly in the ROS assembly.

24VDC-I/L This is the signal from the interlock switch. The scanner motor is turned OFF when the

signal is OFF.

SOS This signal causes the scanner motor in the ROS assembly to begin scanning based on

the laser beam entering the SOS sensor

FGS This is the high-speed detection signal for the scanner motor.

NC The abbreviation for No Connect. It is not connected to the scanner assembly.

– 96 –

Star Micronics WinType 4000 Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual