Epson EPL-5500W User Manual

Download

EPSON TERMINAL PRINTER

EPL-5500W

SERVICE MANUAL

EPSON

4005668

- ii -

NOTICE

The contents of this manual are subjects to change without notice.

All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequence thereof.

Epson is a registered trademark of Seiko Epson Corporation.

GeneralNotice: Other product names used herein are for identicationpurposesonlyand may be trademarks of their respective campanies.

- i -

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage to equipment.

DANGER

WARNING

The precautionary measures itemized below should always be observed when performing repair/ maintenance procedures.

Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings.

Signals a precaution which, if ignored, could result in damage to equipment.

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

- ii -

SAFETY INFORMATION

This printer is a page printer which operates by means of a laser. There is no possibility of danger from the laser, provided the printer is operated according to the instructions in this manual provided.

Since radiationemittedbythelaser is completely confinedwithinprotectivehousings,the laser beam cannot escape from the machine during any phase of user operation.

For United States Users;

[Laser Safety]

This printer is certified as a Class 1 Laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. This means that the printer does not produce hazardous laser radiation.

[CDRH Regulations]

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regulations for laser products on August 2, 1976. Compliance is mandatory for products marketed in the United States. The label shown below indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States.

WARNING : Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure.

[Internal Laser Radiation]

Maximum Radiation Power: 5.0 × 10 Wave Length: 790 ± 20 nm

This is a Class IIIb Laser Diode Assay that has an invisible laser beam. The print head unit is NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened underany circumstances.

For Other Countries Users;

WARNING: Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure.

This is a semiconductorlaser. The maximum power ofthelaser diode is 5.0 × 10 W and the wavelength is 790 ± 20 nm.

For Denmark Users;

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

-4

(W)

-4

Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene.

For Finland, Sweden Users;

- iii -

VAROITUS

Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteiylle.

VARNING

Om apparaten används på annat sätt än i denna bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laser klass

For Finland, Sweden Service People

VAROITUS

Avattaessa jasuojalukitusohitettaessaoletalttiina näkymättömälle laser-säteilylle. Älä katso säteeseen.

VARNING

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

For Norway Users;

ADVARSEL

Dersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kan brukeren utsettes for unsynlig laserstråling som overskrider grensen for laser klasse 1.

Dette er en halvleder laser. Maksimal effeckt til laserdiode er 5.0 × 10-4Wog bølgelengde er 790 ± 20 nm.

Laser Safety Labels

[Label on rear printer case]

A laser safety labels is attached on the outside of the printer shown below.

For United State

For Europe

- iv -

[Label inside printer]

The following laser safety label will be attached inside the printer as shown below.

For Denmark, Finland, Sweden, and Norway

- v -

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of EPL-5500W. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENTS

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides Epson-approved techniques for adjustment.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques andlistslubricants and adhesives required toservice the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.

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

- vi -

REVISION SHEET

Revision Issue Date Revision Page

Rev. A November 24, 1995 1st issue

- vii -

CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENTS CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX

- viii -

Chapter 1 General Description

Table of Contents

1.1 FEATURES 1-1

1.2 SPECIFICATIONS 1-3

1.2.1 Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.2.3 Reliability Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.2.4 Environmental Conditions for Operating (Include Imaging Cartridge) . . . . 1-5

1.2.5 Environmental Conditions for Storage and Transportation . . . . . . . . . . . . 1-5

1.2.6 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.2.7 Specifications for Consumable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.2.8 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.2.9 Software Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1.3 INTERFACE SPECIFICATIONS 1-9

1.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4 OPERATING INSTRUCTIONS 1-9

1.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4.2 Display of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.2.1 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.2.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.3 Printing Resolution Host PC Capability Dependency. . . . . . . . . . . . . . . . 1-11

1.5 MAIN COMPONENTS 1-12

1.5.1 C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

1.5.2 PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1.5.3 PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1.5.4 Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.5.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.5.6 Photoconductor Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.5.7 Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List of Figures

Figure 1-1. Exterior View of the EPL-5500W . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Figure 1-2. Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Figure 1-3. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Figure 1-4. Component Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Figure 1-5. C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Figure 1-6. PWB-E Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-7. PWB-F Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-8. Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Figure 1-9. Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Figure 1-10. Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Figure 1-11. Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List of Tables

Table 1-1. Options for the EPL-5500W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Table 1-2. Paper Feed Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 1-3. Paper Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 1-4. Usability of Special Papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Table 1-5. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Table 1-6. Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Table 1-7. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Table 1-8. Host PC Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Rev. A 1-iii

EPL-5500W Service Manual General Description

1.1 FEATURES

The EPSONEPL-5500W laser printer has a 300/600 dots per inch (dpi) resolution and 6 pages per minute (ppm) printing speed in a dedicated Microsoft Windows 3.1x and Windows 95, achieving very high performance due to the recent advances in PC technology. The main features are:

❏ No ozone

❏ Printing speed — 6 ppm ❏ Resolution — 600/300 dpi ❏ Light weight — about 5 kg (11 lb) ❏ Small footprint ❏ Low running cost: separation of the development/toner cartridge and photoconductor unit ❏ Ease of use with Microsoft Windows Printing System (WPS) ❏ PCL4 software emulation mode ❏ High throughput, especially with fine-pitch halftone image output ❏ Freedom from the memory overflow ❏ Freedom from document incompatibility, True WYSIWYG ❏ Bidirectional parallel interface (ECP and Microsoft Peppy modes) ❏ Achieves high throughput with a very high-speed parallel interface. Maximum transmission speed is

approximately 2 MB/sec. (under ECP mode) or 600 KB/ sec. (under Peppy mode).

Figure 1-1 shows an exterior view of the EPL-5500W.

WindowsPrinting System. It works under Microsoft

Figure 1-1. Exterior View of the EPL-5500W

Rev. A 1-1

General Description EPL-5500W Service Manual

Table 1-1 lists the optional units available for the EPL-5500W.

Table 1-1. Options for the EPL-5500W

Cat. No. Description Note

S050005 Developer cartridge Developer and toner cartridge S051029 Photoconductor unit —

1-2 Rev. A

EPL-5500W Service Manual General Description

1.2 SPECIFICATIONS

This section provides statistical data for the EPL-5500W.

1.2.1 Basic Specifications

Printing method: Laser beam scanning and dry electrophotography Resolution: 600/300 dpi Printing speed: 6 ppm (letter/A4) First printing time (A4/LT): Less than 20 seconds (face-up output) Warm-up time: Less than 35 seconds

(at rated current and 23° C (73° F) temperature)

Paper supply: See Table 1-2.

Table 1-2. Paper Feed Methods

Paper Supply

Standard built-in paper tray

Manual feed slot 1

Capacity Using 20 lb. (75 g/m2)

Paper

150

5 to 10

Paper Sizes

B5, A4, LT, EXEC, LGL

Monarch, DL, C5, Env #10, 11, 12, 14

Any size feedable (Note 2)

Usage Thickness

(Ream Weight)

16 to 24 lb. (60 to 90 g/m

Envelopes made of 20 to 24 lb. (75 to 90 g/m paper

16 to 42 lb. (60 to 157 g/m

Notes:

1. The weight in pounds (lb) is determined by the weight of 500 sheets cut to 17 × 22 inches;

1 g/m

= 0.2659763 lb.

2. Paper size range: width 3 to 8.5 inches (76 to 216 mm) length 5 to 14.0 inches (127 to 356 mm)

Paper types: See Table 1-3.

Table 1-3. Paper Types



Standard paper

Normal paper

Special papers

Xerox 20 lb (75 g/m

Regular photocopier paper Bond paper Recycled paper 16 to 24 lb (60 to 90 g/m

Card stock (90 to 157 g/m Envelopes Labels Letterhead Transparency (OHP) sheets Colored paper

4024 DP paper

)

Rev. A 1-3

Printable Area

4.0 mm

4.0 mm4.0 mm

General Description EPL-5500W Service Manual

Usability of special papers: See Table 1-4.

Table 1-4. Usability of Special Papers

Input OHP Envelopes Labels Card Stock Letterhead

Standard built-in paper tray

Manual feed slot P P P P R

R: Reliable feeding and good image quality. P: Possible, but better avoided. N: Not supported.

Paper feed alignment and direction: Center alignment for all sizes Paper ejection: Face down Output tray capacity: 100 sheets (face down) Printable area (standard paper): See Figure 1-2.

PPPPR

Figure 1-2. Printable Area

Note: The actual printable area depends on the printer mode.

Noise: Less than 35 dB(A), standby

Less than 47 dB(A), operating Ozone density: Less than 0.01 ppm Toxicity: No toxicity exists in organic photoconductor (OPC), toner, or

1-4 Rev. A

plastic materials

EPL-5500W Service Manual General Description

1.2.2 Electrical Specifications Table 1-5. Electrical Requirements and Ranges

Description 100 V Version 200 V Version

Rated voltage 100 ∼ 120 VAC 220 ∼ 240 VAC Input voltage range 90 ∼ 132 VAC 198 ∼ 264 VAC Rated frequency range 50 ∼ 60 Hz Input frequency range 47 ∼ 63 Hz Power consumption Less than 500 W Less than 600 W Power consumption while

in standby mode

Less than 15 W (without option)

1.2.3 Reliability Specifications

MPBF (Mean Prints Between Failures): Over 25,000 sheets Note: MPBF indicates the average number of pages printed before an occurrence of a problem requiring

replacement or service.

MTBF (Mean Time Between Failures): 3000 power on hours (POH) Jam rate: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding) Feed failure: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding) Multiple paper feeds: 1 out of 500 sheets or less Paper curl height: 30 mm (1.2 inches) or less Leading edge bending (1 cm or more): 1 out of 1,000 sheets MTTR (Mean Time To Repair): 30 minutes or less Durability: 5 years or 1,800,000 sheets

1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge)

Temperature: 10 to 35° C (50 to 95° F) Humidity: 15 to 85% RH Altitude: 2,500 m (8,200 feet) or lower Levelness: 1° Illuminance: 3,000 lux or less (Must not be exposed to direct sunlight.) Surrounding space: Printer should have at least 100 mm (4") of clearance on its sides

and rear.

1.2.5 Environmental Conditions for Storage and Transportation

Temperature: 0 to 35° C (32 to 95° F) Humidity: 30 to 85% RH Drop test: Clear to JIS Z0200-1987 Level 1 Vibration: Vibration frequency 5 to 100 Hz and 100 to 5 Hz

Acceleration 1 G

Acceleration direction 3 directions Resistance to atmospheric pressure: More than 61.3 KPa Storage life: 18 months (following date of manufacture)

Rev. A 1-5

General Description EPL-5500W Service Manual

1.2.6 Applicable Standards

Safety Standards

120 VAC model: UL 1950, CSA 22.2 No. 950 Deviation 3 220/240 VAC model: EN 60950 (IEC950), NEMKO (IEC950), SETI (IEC950),

SEMKO (IEC950), DEMKO (IEC950)

Safety Regulations (Laser Radiation)

120 VAC model: FDA (NCDRH) Class 1 220/240 VAC model: VDE 0837 (Laser Class 1) (IEC825), SETI (IEC825), SEMKO

(IEC825), DEMKO (IEC825)

EMI

120 VAC model: FCC Part 15 Subpart B Class B, DOC Class B 220/240 VAC model: Vfg 243 (VDE 0878 Part 3,30)

EN55022 Class B (CISPR Pub. 22 Class B) CE marking, EMC

Others

Toner: No effect on human health (OSHA-TSCA, EINECS) OPC: No effect on human health (OSHA) Ozone: Less than 0.01 mmp

other UL478 (5th edition)

Materials: SWISS environmental law (must contain no CdS)

1.2.7 Specifications for Consumables

Life: Developer and toner cartridge: 3,000 pages

Photoconductor unit: 20,000 pages

Note: In continuous printing mode with A4/letter paper at a 5% image ratio (black/white ratio). The life

varies, depending on the printing mode (continuous or intermittent) and/or the image ratio.

Environmental Conditions for Storage and Transportation

Temperature: 0 to 35° C (32 to 95° F) Humidity: 30 to 85% RH

Drop test: Height 76 cm (30.4 inches) Vibration: Same as printer Resistance to atmospheric pressure: More than 74 Kpa Storage term: 18 months (following date of manufacture)

1.2.8 Physical Specifications

Dimensions (Width × Depth × Height): Printer: 352 × 264 × 299 mm (13.9 × 10.4 × 11.8 inches)

Weight: Approx. 5 kg (11 lb), with consumables, excluding all options

1-6 Rev. A

EPL-5500W Service Manual General Description

1.2.9 Software Specifications

Built-in modes: Microsoft Windows Printing System

PCL4 (software emulation)

Rev. A 1-7

General Description EPL-5500W Service Manual

1.3 INTERFACE SPECIFICATIONS

The EPL-5500W is equipped with the following external interfaces:

❏ Parallel interface

1.3.1 Parallel Interface

The parallel interface has the following two modes:

❏ ECP mode ❏ Microsoft Peppy mode

Pin assignments: Fully IEEE-1284 compliant Connector type: P90-25027-1 (Amphenol) receptacle Applicable plug: 57-30360 (Amphenol or equivalent)

1-8 Rev. A

GREEN Light

RED Light

EPL-5500W Service Manual General Description

1.4 OPERATING INSTRUCTIONS

This section describes printer functions, including control panel operation and messages.

1.4.1 Control Panel

The printer control panel gives you easy control over most common printer operations. The panel consists of the indicator lights described below.

Figure 1-3. Control Panel

Indicator Lights

❏ GREEN light

ON: Printer is ready or idle. Blinking: Printer is currently receiving data.

❏ RED light

ON: Printer has detected errors.

Rev. A 1-9

General Description EPL-5500W Service Manual

1.4.2 Display of Messages

This printer indicates two types of messages with the status message window for the printer driver on the PC.

1.4.2.1 Status Messages

This section describes the status messages.

Table 1-6. Status Messages

Message Status

Printer ready Printer is ready. Printing Printer is printing. Manual feed Printer is loading paper from manual feed slot. Paused Printer is in pause mode. Printing stopped Printer is stopping during printing of a job. Please wait Printer is in the wait condition. Paused printer warming up Printer is warming up. Printer warming up Printer is warming up.

1.4.2.2 Error Messages

This section describes error messages, what they indicate, and what measures to take to eliminate the error.

Table 1-7. Error Messages

Message Status Measures

The user is unable to redirect

Configuration error

Low memory Memory in PC has run out. Add the memory to the PC.

No local printer

Status not available

a port, or system software cannot find a file to complete a request.

The printer is not connected to the local port when you are using PCL emulation.

The printer does not return status information.

Check the printer connection port, and reinstall the driver.

PCL emulation does not support a network.

Check the printer connection.

Check printer/ cable

Service error Printer is damaged. Service required.

Clear paper jam A paper jam occurred.

1-10 Rev. A

The printer does not return status information.

Check the printer connection.

Open the cover and remove the jammed paper. Then close the cover.

EPL-5500W Service Manual General Description

Table 1-7. Error Messages (Continued)

Message Status Measures

Check Toner & Cover

Wrong paper loaded

Change paper Paper settings are wrong. Check the paper size settings.

Printer is cover open or no toner cartridge is installed.

Paper in the tray to be fed into the printer is different from the specified paper size.

Check the cover and toner cartridge.

Check the paper size.

1.4.3 Printing Resolution Host PC Capability Dependency

This printer driver calculates the host PC’s capability every time Windows starts up, and the driver drops the printing resolution at the beginning of each job automatically if the value it detects will not allow complete printing at the resolution the user has set. This printer can print pages at the resolution if the HOST PC fulfill the following conditions.

Table 1-8. Host PC Conditions

Installed DRAM Quantity

CPU

Windows 3.1, WFW 3.11 Windows 95

< 8 MB ≥ 8 MB < 8 MB ≥ 12 MB

80386SX 16/20/25/33 MHz or compatibles

80386DX 16/20/25/33 MHz or compatibles

80486SX/DX 16/20 MHz or compatibles

80486SX/DX 25/33/50 MHz 80486DX2 50/66 MHz 80486DX4 75/100 MHz Pentium 60/66/75/90/100 120/133 MHz

300 DPI (Note 1)

300/600 DPI

(Note 2)

300/600 DPI

(Note 2)

300 DPI (Note 1)

300/600 DPI

(Note 2)

300/600 DPI

——

300 DPI (Note 1)

300/600 DPI

(Note 2)

300/600 DPI

(Note 2)

300 DPI (Note 1)

300/600 DPI

(Note 2)

300/600 DPI

Note 1: Some pages may be not be printed completely, depending on complexity of those pages. Note 2: Some pages may not be printed at 600 DPI depending on complexity of those pages.

Rev. A 1-11

General Description EPL-5500W Service Manual

1.5 MAIN COMPONENTS

To simplify maintenance and repair, the main components of the EPL-5500W have been designed for easy removal and replacement. The main components are:

❏ C180 MAIN Board Main board ❏ PWB-E Board Power supply circuit board ❏ PWB-F Board High-voltage supply circuit board ❏ Optical Unit Printhead unit ❏ Fusing Unit ❏ Photoconductor unit ❏ Developer cartridge ❏ Housing

C180 MAIN Board

Fusing Unit

PWB-E Board

Optical Unit

PWB-F Board

Figure 1-4. Main Components

1-12 Rev. A

M3807 (IC201)

E05B23 (U6)

4M DRAM (U4)

EPL-5500W Service Manual General Description

1.5.1 C180 MAIN Board

The C180 MAIN board contains a parallel interface controller and engine controller board. The primary functions of this board are receiving print data from the host and sending the print image to the engine controller via the video interface.

❏ Memory chips

4M-bit DRAM (U4)

❏ Custom ICs

ASIC E05B23 (U6)

The engine controller consists of an M3807 x 8-bit CPU, including a MASK ROM. It controls laser scanning (the polygon mirror drive motor), image synchronization, laser beam pulse width, and power.

Figure 1-5. C180 MAIN Board

Rev. A 1-13

VR3

General Description EPL-5500W Service Manual

1.5.2 PWB-E Board

The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts the AC line voltage into +24 V and +5 VDC voltages. There are two types of power supply board, the 100/120 V type and 220/240 V type. The difference between the two circuits is only in the input section.

CAUTION

Do not touch VR1 on PWB-E board. This volume is for factory setting only.

VR1

Figure 1-6. PWB-E Board

1.5.3 PWB-F Board

The PWB-F is the high-voltage supply circuit board. It converts the development bias, OPC drum charge bias, and image transfer bias.

CAUTION

Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.

Figure 1-7. PWB-F Board

1-14 Rev. A

EPL-5500W Service Manual General Description

1.5.4 Optical Unit

The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) which drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by the laser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrors and lenses, to create a latent electro-photographic image on the drum.

Figure 1-8. Optical Unit

1.5.5 Fusing Unit

The fusing unit fixes the toner to the paper using heat and pressure. This unit has a heater lamp, thermistor, and thermal fuse. There are two types of fusing units, the 120 V type and the 220/240 V type. The only difference between them is the heater lamp.

Figure 1-9. Fusing Unit

Rev. A 1-15

General Description EPL-5500W Service Manual

1.5.6 Photoconductor Unit

Core mechanisms of the printing process, such as charging and imaging, are integrated into this unit.

Figure 1-10. Photoconductor Unit

1.5.7 Developing Cartridge

The developing mechanism for the printing process is integrated into this cartridge.

Figure 1-11. Developing Unit

1-16 Rev. A

Chapter 2 Operating Principles

Table of Contents

2.1 ENGINE OPERATION 2-1

2.1.1 Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.1.1.1 Paper Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1.1.2 Drum Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.1.1.3 Laser Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.1.1.4 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.1.1.5 Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.1.1.6 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.1.2 Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.1.2.1 Main Motor Functions and Control . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor. . . . . . . . . . . . . . . 2-9

2.1.2.3 Fuser Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.1.2.4 Scanner Mirror Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.1.2.5 Laser Diode Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.1.2.6 Bias Voltages and Laser Drive Timing . . . . . . . . . . . . . . . . . . . . 2-13

2.1.2.7 Fan Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

2.1.2.8 Power Supply Circuit Function and Safety Protection. . . . . . . . . 2-15

2.2 PARALLEL INTERFACE CONTROLLER OPERATION 2-16

2.2.1 C180 MAIN Board Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

List of Figures

Figure 2-1. Main Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2. Print Process Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-3. Paper Feeding from the Paper Feed Tray . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-4. Drum Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-5. Laser Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-6. Development. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-7. Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-8. Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-9. Engine Controller Connecting Diagram . . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-10. Gear and Roller Positions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-11. Main Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-12. Paper Take-Up Sensor and Paper Exit Sensor On/Off Timing . . . 2-9

Figure 2-13. Fuser Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-14. Temperature for Fuser Control Procedure . . . . . . . . . . . . . . . . . . 2-10

Figure 2-15. Scanner Motor Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-16. Laser Diode Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-17. LDATA Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-18. Laser Emission Power Adjustment Timing . . . . . . . . . . . . . . . . . . 2-12

Figure 2-19. High-Voltage Supply Block Diagram. . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-20. Print Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-21. Print Sequence (Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-22. Print Sequence (End) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-23. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-24. Parallel Interface Controller Section . . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 2-25. C180 MAIN Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2-16

List of Tables

Table 2-1. Functions of C180 MAIN Board Main Elements. . . . . . . . . . . . . . . 2-18

4 5

EPL-5500W Service Manual Operating Principles

2.1 ENGINE OPERATION

This section describes the functions and operating principles of the EPL-5500W engine. Figure 2-1 shows the locations and names of the main engine components.

Figure 2-1. Main Components

1. Fan Motor (M3) 11. Paper Feeding Tray

2. Lower Fusing Roller 12. Paper Lift-up Plate

3. Paper Exit Sensor (PC3) 13. Paper Take-up Roller

4. Upper Fusing Roller 14. Paper Transport Roller

5. Heater Lamp (H1) 15. Paper Take-up Sensor (PC1)

6. Paper Exit Roller 16. Pre-image Transfer Roller

7. Print Tray 17. Electrode Comb

8. Optical Unit 18. Drum Cartridge

9. Toner Cartridge

10. Manual Feed Guide

Rev. A 2-1

Optical Unit

Drum Cartridge

Toner Cartridge

Paper Feeding Tray

Fusing

Image Transfer

Print Exit

Drum Charge

Toner Hopper

Development

Multi Feeding (150 sheets)

Manual Feed (1 sheet)

Exposure

Operating Principles EPL-5500W Service Manual

2.1.1 Print Process

This section describes the print process from paper feeding to paper exit. Figure 2-2 shows a diagram of the print process.

Figure 2-2. Print Process Diagram

2-2 Rev. A

Upper Fusing Roller

Paper Exit Roller

Lower Fusing Roller

PC Drum

Pre-Image Transfer Roller

Paper Lift-Up Plate

Fixed Separating Pad

Transport Roller

Paper Take-Up Sensor (PC1)

Paper Exit Sensor (PC3)

Paper Take-Up Roller

Depression Cam

Paper TakeUp Clutch

Paper Take-Up Solenoid (SL1)

When SL1 is de-energized

When SL1 is energized

Paper Lift-Up Plate Paper

EPL-5500W Service Manual Operating Principles

2.1.1.1 Paper Feeding

Paper can be fed into the printer from the paper feed tray (150 sheets) or from the manual feed slot (1 sheet at a time). Paper fed by the paper take-up roller is transported to the transport roller, pre-image transfer roller, and then exit roller. After this, the paper is fed out onto the print tray. The starting position of an image is decided by the paper take-up sensor (PC1). A photo sensor is used as the paper take-up sensor (PC1) and the paper exit sensor (PC3).

Paper Feeding Tray (Standard Tray)

When the paper take-up solenoid is energized, the main motor (M1) drive is transmitted to the paper take-up roller via the paper take-up clutch (a one-way clutch) to rotate the paper take-up roller one revolution. At the same time, the depression cam rotates and releases the paper lift-up plate to feed the top (first) paper. The fixed separating pad is used for the paper separation system. It prevents the second or later sheets from being fed together with the top paper.

Figure 2-3. Paper Feeding from the Paper Feed Tray

Rev. A 2-3

Operating Principles EPL-5500W Service Manual

2.1.1.2 Drum Charge

The PC drum is charged with static electricity before laser exposure. The rotating charge brush and pre-film are used as the charging method. Less ozone is generated by the corona charge of the rotating charge brush and the pre-film, and the PC drum can be charged with low voltage because the charge is directly applied to the PC drum. The charge brush is rotated by the drive of the M1 main motor via its gear.

C180 MAIN

IC201

B Pre-film

A: Drum Charging Bias B: Drum Ground

Drum Cartridge

Rotating Charge Brush

PC Drum Protecting Shutter

Drum Charging and Pre-film Bi as

PC Drum Protecting Shutter

Charged Su rface: (approx. -800 V)

PC Drum

PWB-F

Figure 2-4. Drum Charge

2-4 Rev. A

Charged Surface

Laser-Exposed Surface: (Approx. -50 V)

PWB-D

SOS Sensor

Reflector Mirror

Laser Diode

CN210

CN205

C180 MAIN

IC201

Vs Terminal

VB TerminalVBL Terminal

VB (Developing Bias)

VBL (Toner Blade Bias)

Vs (Lower Seal Bias)

PWB-F

CN1F

CN204

C180 MAIN

IC201

EPL-5500W Service Manual Operating Principles

2.1.1.3 Laser Exposure

The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start of scan) sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timing for each scan line.

Figure 2-5. Laser Exposure

2.1.1.4 Development

Toner is applied to the invisible static image on the PC drum and a toner image is created on the surface. When the PC drum starts to rotate (when the main motor is activated), the PC drum surface remains 0 V at the position between the rotating charge brush and sleeve roller. At this time, a specified positive voltage is applied to the sleeve roller to prevent toner from being attracted back onto the PC drum (reverse bias control).

Figure 2-6. Development

1. Toner hopper: Contains toner.

2. Toner agitating screw:Stirs the toner in the hopper and sends the toner to the toner transport

3. Toner transport roller: Transports the toner to the sleeve roller.

4. Doctor blade: Spreads a thin, even coat of toner over the resin sleeve. The toner is

negatively charged by passing between this blade and resin sleeve.

roller.

5. Sleeve roller: Rotates the resin sleeve.

6. Resin sleeve: Carries the toner to the PC drum surface for development.

7. Bias seal: Collects the toner remaining on the resin sleeve.

8. PC drum: Is exposed to the laser to create an invisible image and rotates to carry

Rev. A 2-5

the developed image to the paper surface.

Operating Principles EPL-5500W Service Manual

2.1.1.5 Image Transfer

The electrode comb is an image transfer system that transfers the toner image on the PC drum onto the paper.

Image Transfer Unit

Housing

Electrode Comb

Pre-Image Transfer Roller

Housing

Electrode Comb

Housing

Pre-Image Transfer Roller

Housing Ground

Image Transfer Bias

PWB-F

CN1F

PWB-S

818

C180 MAIN

IC201

CN204

Figure 2-7. Image Transfer

2.1.1.6 Fusing

The toner image transferred onto the paper is fixed securely using a heat roller system as the fusing system. The upper fusing roller, which is heated by the heater lamp, fuses the toner image, which is securely fixed by the pressure between the upper and lower fusing rollers. Thermistor TH1 detects and controls the temperature of the upper fusing roller. Thermal fuse TF1 blows when the temperature exceeds 200° C (392° F), shutting down power to the heater lamp.

Thermal Fuse

Thermistor

Lower Fusing Roller

Upper Fusing Roller

Paper

Figure 2-8. Fusing

Heater Lamp

2-6 Rev. A

C180 MAIN Board

Main Motor (M1)

Polygon Motor (M2)

Fan Motor (M2)

Exit Sensor (PC3)

Paper Take-up Sensor (PC1)

Paper Take-up Solenoid (SL1)

Fusing Roller Thermistor (TH1)

PWB-S

PWB-F High Voltage Unit

Image Transfer Housing

Image Transfer Charger

PWB-D Laser Diode Drive

PWB-E Power Unit

Heater Lamp

Interlock Switch

EPL-5500W Service Manual Operating Principles

2.1.2 Engine Control

This section describes engine control, the power supply board, and the high-voltage supply board. The engine is controlled by the main board (C180 MAIN board). Figure 2-9 shows the engine controller connection diagram.

Figure 2-9. Engine Controller Connection Diagram

Rev. A 2-7

Toner Cartridge

Sleeve Roller

Paper Exit Roller

Upper Fusing Roller Lower Fusing Roller

PC Drum

Pre-image Transfer Roller

Main Motor (M1)

Optional Second Paper Feeding Unit

Paper Take-Up Roller

Paper Transport Roller

Operating Principles EPL-5500W Service Manual

2.1.2.1 Main Motor Functions and Control

The M1 main motor transmits the drive to the printer rollers and the optional second paper feed unit (lower cassette) via each gear, as shown below.

Figure 2-10. Gear and Roller Positions

2-8 Rev. A

CN206

M1 Mai n Moto r

Board

C180 MAIN

EPL-5500W Service Manual Operating Principles

Figure 2-11 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motor, controlled by the CPU (IC201) on the main board (C180 MAIN). This board has a stepping motor driver IC that drives the M1 main motor with a constant current.

Figure 2-11. Main Motor Drive Circuit

2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor

The paper take-up sensor has three functions:

1. To detect the top edge of paper. The engine starts printing when the detection signal is received.

2. To detect paper size. The printer detects the time it takes for paper to pass the paper take-up sensor during paper feeding. If this time is long, longer paper is feeding; if the time is short, shorter paper is feeding.

3. To detect paper jams and feed jams.

If the paper take-up sensor does not turn on for paper feeding, the printer detects a feed jam or no paper. A feed jam is a paper jam that occurs in the feed process.

If any of the following conditions is detected, the printer detects a paper jam. A paper jam is a jam that occurs in the printing process area.

The paper take-up sensor (PC1) or the paper exit sensor (PC3) is on at power on or when the upper case is closed.

The paper take-up sensor (PC1) or the paper exit sensor (PC3) is not turned on or off within the specified time. (Refer to the following timing chart.)

PC1 (CN203-3)

PC3 (CN208-3)

Take Up Solenoid ON

2.0 11.0

3.5-4.5

3.4-4.7

[seconds]

Figure 2-12. Paper Take-Up Sensor and Paper Exit Sensor

On/Off Timing

Rev. A 2-9

Operating Principles EPL-5500W Service Manual

2.1.2.3 Fuser Control

The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receives a FUSER signal from the main board (C180 MAIN), the power supply board (PWB-E) supplies the AC voltage to the heater lamp. This AC voltage is cut by an interlock switch when the case is open.

Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analog voltage to the 77-pin chip, IC201. Based on this temperature data, the heater lamp on/off signal (the output from the 54-pin chip, IC201, causing heater lamp H1 to turn on or off to control the fusing temperature. When the heater lamp is not turned off even if the thermistor detects a high temperature malfunction (which occurs if the surface temperature of the upper fusing roller exceeds 200º C), the signal from the 75-pin chip, IC201, changes from H to L to turn off the heater lamp forcibly.

FUSER signal) is

C180 MAIN

IC201

IC202B

5 6

5 VDC

IC202A

2 3

Analog Voltage Detected by the Thermistor (TH1)

CN202 1

CN207 1

CN1E

Heater Lamp ON/OFF Signal

H1:ON

H1:OFF

Figure 2-13. Fuser Control Circuit

The following figure shows the fuser temperature control procedure.

Temperature (Degrees C)

172

When a print is m ade immed iately a fter warm up

PWB-E

CN3E 1

2 3

TH1

Thermistor

Heater Lamp

TF1

Thermal Fuse

156

112

Power On

Warm up Standby Standby with Low

Temperature

Time

Figure 2-14. Temperature for Fuser Control Procedure

1. Warm up: After printer initialization, printer warm up starts, and the heater lamp turns on until the upper fusing roller’s temperature reaches approximately 172º C (342º F).

2. Standby: In standby mode, the upper fusing roller’s temperature is controlled to maintain 156º C (313º F). When this condition continues for 3 minutes, the printer goes into standby mode at low temperature.

3. Print cycle: When the printer receives the printing command from the controller, the upper fusing roller is controlled to maintain 172º C (342º F).

4. Standby at low temperature: The upper fusing roller is controlled to maintain 112º C (234º F).

2-10 Rev. A

+24V

GND2

CN210

C180 MAIN Board

M2 Scanner Motor

+5V

P_CTL

EPL-5500W Service Manual Operating Principles

If any of the following conditions are detected, the printer indicates a fuser error:

1. If the thermistor detects the temperature has not risen by 20º C for 50 msec. within 12 to 30 sec. after warm up. (This error applies only when the thermistor detects a temperature of 90º C (194º F) or less.)

2. If the thermistor detects that the temperature has not reached 172º C (342º F) within 60 sec. after warm up.

3. Except in pause mode (see the note below), if the thermistor detects that the temperature in the idle state has fallen to 80º C (176º F) or lower for 50 msec., or the temperature during printing has fallen to 133º C (271º F) or lower.

4. The thermistor detects that the temperature has exceeded 193º C (379º F) for 50 msec. during temperature control.

Note: In Pause Mode, the control temperature is decreased to save power in the idle state, the

heater lamp is turned OFF.

Thermo fuse TF1 cuts power if the temperature of the fusing section rises to an abnormally high level (over 200° C, 392° F).

2.1.2.4 Scanner Motor Control

Figure 2-16 is the scanner motor (M2) control circuit. The scanner motor is driven while it receives the POLYGON CTL signal. Motor rotation speed is 8622 rpm.

Figure 2-15. Scanner Motor Control Circuit

If the any of following conditions are detected, the printer indicates a scanner motor error:

1. The SSCAN signal has not been given once within 1 sec. after the scanner motor is energized.

2. The number of scanner motor rotations has not stabilized within ± 0.5 rpm by 4.2 sec. after the motor is energized.

3. The number of scanner motor rotations has exceeded ± 3% for more than 0.5 sec. after the motor is energized, even if the rotation number stabilizes within ± 0.5 rpm.

Rev. A 2-11

SSCAN

LD_CTL LDAPC1 LDAPC2

L DATA

C180 MAIN Boa rd

LD SOS (PWB-D)

Laser Diode

SOS Sensor

SOS Mirror

Scanner Motor On

LDATA

LDAPC1

LDAPC2

P_CTL

Operating Principles EPL-5500W Service Manual

2.1.2.5 Laser Diode Drive

Figure 2-16 shows the laser diode drive circuit. Laser diode emission is controlled by three signals (LDATA, LDAPC1, and LDAPC2) from the main board (C180 MAIN).

Figure 2-16. Laser Diode Drive Circuit

The

LDATA signal is the laser on/off signal. When it is LOW, the laser emits, and when it is HIGH, the laser stops emitting. FORCED LASER DIODE ON signal is activated (LOW), the signal is an image signal sent from the video controller circuit. The FORCED LASER DIODE ON signal is a laser emission signal to apply the laser beam to the SOS sensor.

LDATA is the combination of the two signals in the figure below. If the VIDEO or the

LDATA signal will be active. The VIDEO

Forced Laser Diode ON

L DATA

VIDEO

from the Video

Controller Circuit (C180 MAIN)

Figure 2-17. LDATA Generation Circuit

The laser diode is forcibly activated after scanner motor M2 turns on. At this time, laser emission power is adjusted. LDAPC1 and LDAPC2 are the laser emission power adjust signals; they are analog signals. LDAPC1 is a tuning, and LDAPC2 is a fine tuning signal.

If either of the following conditions is detected, the printer indicates a laser error: The LDAPC1 signal or LDAPC2 signal has been out of the specified range while laser power is adjusted.

2-12 Rev. A

Figure 2-18. Laser Emission Power Adjustment Timing

EPL-5500W Service Manual Operating Principles

2.1.2.6 Bias Voltages and Laser Drive Timing

Figure 2-19 is a diagram of the drum charge bias voltage, image transfer bias voltage, and the developing bias voltage control circuit. These bias voltages are generated from the +24 VDC from the high-voltage supply board (PWB-F). If the printer detects a case-open condition, the interlock switch is set to off, which cuts the +24 VDC, which, in turn, cuts the bias voltages.

These bias voltages are controlled by the main board (C180 MAIN). The

HV-T signal is the image transfer bias voltage control. While this signal is LOW, the image transfer electrode comb is charged to from +3 to +6K VDC by the high-voltage supply circuit.

HV SEL1 and HV SEL2 are image transfer bias level control

signals. The HVB signal is the digital signal for developing bias voltage control. This signal controls the bias on/off.

The BIAS MON signal controls the bias voltage level (–300 V to –375K VDC) using pulse data. The image density is controlled by the developing bias voltage level.

Power Supply Board (PWB-E)

+24 VDC

Interlock SW

Main Board (C180 MAIN)

+24 VDC

HV SEL1 HV SEL2

BIAS MON

HV-C HV-T

HV B

PWB-S

High Voltage Supply Board (PWB-F)

Drum Charge

-2.0 K VDC Image Transfer

Bias 3K to 6 K VDC

Developing Bias

-270 to -370 VDC Toner Doctor Blade

Bias -500 VDC Seal Bias

-250 VDC

Figure 2-19. High-Voltage Supply Block Diagram

Rev. A 2-13

Brush Roller Charging

Laser Exposure

PC Drum

Image Transfer

Development

[m sec.]

Print Command

Polygon Motor (M3)

Paper Take-up Sensor (PC1)

Paper Take-up Solenoid (SL1/2)

Main Motor (M1)

Drum Charge

Laser Exposure

Development

Image Transfer

200

500

300

2310

150

500

260

1st:770, 2nd:2820

1st: 790 to 1300 2nd: 2670 to 3080

480

1st: 1510 2nd: 1680

Normal M3 Rotation

4000

[m sec.]

Polygon Motor (M3)

Main Motor (M1)

Drum Charge

Laser Exposure

Development

Image Transfer

Paper Exit Sensor (PC3)

5160

850

480

Operating Principles EPL-5500W Service Manual

Figure 2-20 shows the print process.

Figure 2-20. Print Process

Figure 2-21 shows the start print sequence. The printer’s engine starts printing when it receives the signal from the video controller circuit.

Figure 2-21. Print Sequence (Start)

Figure 2-22 is the end of the print sequence.

2-14 Rev. A

Figure 2-22. Print Sequence (End)

AC IN

Interlock SW

+24 VDC

+5 VDC

Power Supply Board (PWB-E)

EPL-5500W Service Manual Operating Principles

2.1.2.7 Fan Motor Control

The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotates during printing. When printing ends, the fan motor stops after 3 min.

If the following condition is detected, the printer indicates a laser error: The voltage equivalent to the motor current of the fan motor remains 160 mV or lower for 2 sec.

2.1.2.8 Power Supply Circuit Function and Safety Protection

The printer’s power supply board (PWB-E) supplies the +5 VDC and +24 VDC. The +24 VDC is used as the bias voltage supply, main motor (M1) drive, scanner motor (M2) drive, fan motor (M3) drive, and solenoid drive. For safety protection, the +24 VDC line is cut when the interlock switch (case open switch) is off.

Figure 2-23. Power Supply Circuit Block Diagram

Rev. A 2-15

Operating Principles EPL-5500W Service Manual

2.2 PARALLEL INTERFACE CONTROLLER OPERATION

The parallel interface controller section converts from a bidirectional parallel interface to a video interface. The parallel interface controller section is in the C180 MAIN board.

C180 MAIN Board

Parallel Interface Controller Section

Engine Controller Section

Figure 2-24. Parallel Interface Controller Section

2.2.1 C180 MAIN Board Operation

Figure 2-25 shows a block diagram of parallel interface controller section of the C180 MAIN board.

Bidirectional Parallel I/F

E05B23 (U8)

4M DRAM (U4)

Engine Controller Sectio n

Figure 2-25. C180 MAIN Board Block Diagram

2-16 Rev. A

EPL-5500W Service Manual Operating Principles

Table 2-1 lists the functions of the main elements of the video controller section in the C180 MAIN board.

Table 2-1. Functions of C180 MAIN Board Main Elements

Element Location Function

This ASIC contains the following functions:

E05B23 ASIC U8

DRAM U4 These DRAMs are used as the working area of the E05B23.

Changing from parallel I/F to video I/F. DRAM management (refresh control, RAS/CAS control).

Rev. A 2-17

Chapter 3 Disassembly and Assembly

Table of Contents

3.1 GENERAL INFORMATION 3-1

3.1.1 Precautions for Disassembly/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1.2 Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.1.4 Service Checks after Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2 DISASSEMBLY AND ASSEMBLY 3-4

3.2.1 Housing Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.1.1 Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.2 Removal of the Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.2.2.1 Main Board (C180 MAIN Board) Removal . . . . . . . . . . . . . . . . . . 3-5

3.2.3 Disassembling the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.1 Optical Unit Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.2 Image Transfer Roller Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.3.3 Upper Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.2.3.4 High-Voltage Supply Board (PWB-F) Removal. . . . . . . . . . . . . . 3-10

3.2.3.5 Power Supply Unit (PWB-E) Removal. . . . . . . . . . . . . . . . . . . . . 3-11

3.2.3.6 Fusing Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.3.7 Fusing Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

List of Figures

Figure 3-1. Removing the Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-2. Removing the Shield Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-3. Removing the C169 MAIN-B Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-4. Removing the Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Figure 3-5. Removing the Image Transfer Unit -1. . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-6. Removing the Image Transfer Unit -2. . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-7. Moving the Image Transfer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-8. Reinstalling the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-9. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-10. Removing the Upper Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-11. Removing the PWB-F Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-12. Removing the PWB-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-13. Removing the PWB-E Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-14. Removing the PWB-E. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-15. Gear and Spring Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-16. Removing the Fusing Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-17. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-18. Removing the Fusing Entrance Guide . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-19. Removing the Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-20. Roller Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-21. Removing the Heater Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Figure 3-22. Removing the Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-23. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-24. Removing the Paper Separator . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-25. Paper Exit Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-26. Removing the G-Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-27. Removing the Upper Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-28. Removing the Lower Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-19

Figure 3-29. Removing the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

List of Tables

Table 3-1. Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Table 3-2. Abbreviations Used for Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-3. Screw Types and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-4. Checks after Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

EPL-5500W Service Manual Disassembly and Assembly

3.1 GENERAL INFORMATION

This chapter describes disassembly/assembly procedures to use to replace the main assemblies of the EPL-5500W.

3.1.1 Precautions for Disassembly/Assembly

Follow the precautions below when disassembling/assembling the printer.

WARNING

❒Disconnect the power cord before disassembling/assembling the printer. ❒Be sure to handle the fusing unit carefully, because the unit remains hot for a while after

the printer stops printing. ❒If it is necessary to plug in the power cord and operate the printer after disassembling it, please be careful of the following:

1.Keep your hands and clothing well away from operating or rotating parts (such as rollers, fan motors, etc.).

2.Never touch electric terminals or high-voltage components (such as the charger and the high-voltage unit).

CAUTION

❒Do not disassemble the photoconductor unit and toner cartridge. ❒If the photoconductor unit is removed from the printer, do not place it in direct sunlight. ❒Do not disassemble the optical unit. ❒Never turn power on if the optical unit is not installed. ❒To prevent damage to ICs from static electricity, do not touch the ICs on the circuit

board or the terminals of peripheral electrical components with your hands. ❒Use only the recommended tools to ensure safe and efficient maintenance work. Inappropriate tools may damage the machine. ❒Never open the upper unit until the main motor stops completely. Otherwise, the gears may be damaged. ❒When transporting the printer, remove the photoconductor unit and toner cartridge from the printer. ❒When transporting the printer a long distance, pack up the printer using the original packing material.

3.1.2 Tools

Use the tools listed in Table 3-1 for disassembling/assembling the printer and for troubleshooting.

Table 3-1. Tools

Name Commercially Available? Part No.

Philips screwdriver no. 2 Yes B743800200 Regular screwdriver Yes B743000100 Tweezers Yes B641000100 Soldering iron Yes B740200100 Round-nose pliers Yes B740400100

Rev. A 3-1

Disassembly and Assembly EPL-5500W Service Manual

3.1.3 Small Parts

In the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and 3-3 list these abbreviations.

Table 3-2. Abbreviations Used for Screws

Abbreviation Part Name

CP Cross-recessed Pan head CC Cross-recessed Cup head CP(O) Cross-recessed Pan head with Outside-toothed lock washer CP(S)(P1) Cross-recessed Pan head with Spring lock washer and 1 Plain washer CCB Cross-recessed Cup head Bind SCB Slotted Cross-recessed B-tight SCB(S)(P1) Slotted Cross-recessed Bind with Spring washer and 1 Plain washer

Table 3-3. Screw Types and Abbreviations

Top Side

Cross-recessed

1. head

Slotted Cross-

2. recessed head

Head

Bind

Pan

Cup

1.Normal

—————-

B-tight

Body

Washer

(Assembled)

Plain washer 1

Outside-toothed

2. lock washer

Spring washer

3-2 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

3.1.4 Service Checks after Repair

Check the repaired unit using the following list on completion of servicing.

Table 3-4. Checks after Repair

Item Location Checkpoint Check

Control panel Do all LEDs and buttons function normally?

Operation

Adjustments Print position

Cleaning

Packing

Heater lamp Does the heaterlamp turn on normally? Test Page Is the test page printed normally? Data print Does data print in all modes?

Is the gap between the top edge of the paper and the horizontal line in the adjustment printing sheet print exactly 4.2 mm (0.17 inch).

Is toner and dust removed from the paper path? Is the paper take-up roller cleaned? Is the roller in the fusing unit cleaned? Is the outer surface of the printer clean?

Are the consumables removed from the printer? Is the unit packed securely? Are accessories packed also?

Rev. A 3-3

2. Front Cover

1. Left cover

3. Operation Cover

4. Rear Cover

Upper unit

Upper unit lock release button

Disassembly and Assembly EPL-5500W Service Manual

3.2 DISASSEMBLY AND ASSEMBLY

This section describes and illustrates procedures for removing and disassembling components of the EPL-5500W. Cleaning is described in Chapter 6. The assembly procedures are not described, except for special notes where necessary, because assembly can be accomplished by performing disassembly in reverse.

3.2.1 Housing Removal

This section describes how to remove the cases and the rear frame.

3.2.1.1 Case Removal

1. Push the upper unit lock release button, and open the upper unit.

2. Remove each cover in the following order.

ASSEMBLY POINT

When reinstalling each cover, securely insert the protrusions for the cover into the cutouts in the printer frame.

3-4 Rev. A

Figure 3-1. Removing the Housing

EPL-5500W Service Manual Disassembly and Assembly

3.2.2 Removal of the Controller Section

The control section is comprised of the controller board (the C180 MAIN board).

3.2.1.1 Main Board (C180 MAIN Board) Removal

1. Turn the printer so that its right side faces you.

2. Remove the right cover.

3. Remove 2 screws, and then remove the shield case.

Figure 3-2. Removing the Shield Case

4. Disconnect all connectors on the C180 MAIN board.

5. Remove the 5 screws for the C180 MAIN board.

6. Remove the C180 MAIN board.

Figure 3-3. Removing the C180 MAIN Board

Rev. A 3-5

Disassembly and Assembly EPL-5500W Service Manual

3.2.3 Disassembling the Engine

This section describes disassembling the engine, including the high-voltage unit (PWB-F) and power supply board (PWB-E).

3.2.3.1 Optical Unit Removal

CAUTION

❒Do not touch the optical unit, except during replacement. ❒Do not open the unit under any conditions. ❒Do not remove the circuit board from the optical unit under any conditions.

1. Open the top cover.

2. Remove the right cover, left cover, and front cover. (Refer to Section 3.2.1.1.)

3. Remove the cover shield plate.

4. Disconnect connectors CN205 and CN210 from the C180 MAIN board.

4. Remove the 6 screws from the optical unit.

5. Remove the optical unit.

Figure 3-4. Removing the Optical Unit

3-6 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

3.2.3.2 Image Transfer Unit Removal

1. Open the top cover.

2. Remove harness cover A. (Refer to Section 3.2.3.3.)

3. Remove the 2 screws and holders at both ends of the image transfer unit.

Figure 3-5. Removing the Image Transfer Unit - 1

4. Disconnect the 2 connectors and remove the unit.

Figure 3-6. Removing the Image Transfer Unit - 2

Rev. A 3-7

Disassembly and Assembly EPL-5500W Service Manual

ASSEMBLY POINT

After reinstalling the image transfer unit, check that the unit smoothly moves up and down.

Figure 3-7. Moving the Image Transfer Unit

5. Remove the electrode comb.

ASSEMBLY POINT

When reinstalling the electrode comb, be careful of the direction of installation. Install the electrode comb so that the comb terminal faces the image transfer roller drive gear.

Figure 3-8. Reinstalling the Electrode Comb

3-8 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

3.2.3.3 Upper Unit Removal

1. Open the upper unit.

2. Remove the right cover and left cover. (Refer to Section 3.2.1.1.)

3. Disconnect connectors CN202, CN208, and CN211 from the C180 MAIN.

4. Remove harness covers A and B, and pull CN1 out from the PWB-E board.

5. Remove the image transfer unit. (Refer to Section 3.2.3.2.)

Figure 3-9. Removing the Harness Cover

6. Slide and remove the unit as shown in the illustration.

Figure 3-10. Removing the Upper Unit

Rev. A 3-9

Disassembly and Assembly EPL-5500W Service Manual

3.2.3.4 High-Voltage Supply Board (PWB-F) Removal

1. Open the top cover.

2. Remove 1 screw from the PWB-F cover.

3. Remove the PWB-F cover.

Figure 3-11. Removing the PWB-F Cover

4. Remove the 4 screws from the PWB-F board.

5. Disconnect 2 connectors.

6. Remove the PWB-F board.

Figure 3-12. Removing the PWB-F

3-10 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

3.2.3.5 Power Supply Unit (PWB-E) Removal

1. Remove the upper unit. (Refer to Section 3.2.3.3.)

2. Remove 6 screws, and remove the PWB-E cover.

Figure 3-13. Removing the PWB-E Cover

3. Disconnect connector CN207 from the C180 MAIN board.

4. Remove 4 screws and 2 screws, and then remove the PWB-E.

Figure 3-14. Removing the PWB-E

Rev. A 3-11

Disassembly and Assembly EPL-5500W Service Manual

3.2.3.6 Fusing Unit Removal

1. Open the top cover. (Refer to Section 3.2.3.3.)

2. Remove the image transfer unit. (Refer to Section 3.2.3.2.)

3. Remove 1 screw, and remove the drive tension section of the fusing unit.

4. Remove the transport gear.

5. Release the hook for the spring and remove the drive gear section of the fusing unit.

ASSEMBLY POINT

When rehooking the spring, be sure to hook it in the correct position.

drive gear section of the Fusing unit

drive transport gear

hook of the spring

Figure 3-15. Gear and Spring Position

6. Remove 2 screws, and remove the fusing guide plate.

drive tension section of the Fusing unit

Figure 3-16. Removing the Fusing Guide Plate

3-12 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

7. Remove the harness cover.

Figure 3-17. Removing the Harness Cover

8. Remove the fusing entrance guide.

Figure 3-18. Removing the Fusing Entrance Guide

Rev. A 3-13

Disassembly and Assembly EPL-5500W Service Manual

10. Remove 4 screws, and remove the fusing unit.

Figure 3-19. Removing the Fusing Unit

ASSEMBLY POINT

After reinstalling the fusing unit, check the direction of the bushings on the paper exit roller and the connection between the roller and the ground plate.

Figure 3-20. Roller Position

3-14 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

3.2.3.7 Fusing Unit Disassembly

This section describes how to remove the paper exit sensor, heater lamp, lower fusing roller, and upper fusing roller.

Heater Lamp

CAUTION

Do not touch the glass surface of the lamp with your bare hands.

1. Remove the fusing guide plate. (Refer to Section 3.2.3.8.)

2. Pull the heater lamp out of the lamp holder from the front side.

Figure 3-21. Removing the Heater Lamp

ASSEMBLY POINT

When reinstalling the lamp, position its voltage indicator to the left side (non-gear end.).

Rev. A 3-15

Disassembly and Assembly EPL-5500W Service Manual

Thermistor

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the 1 screw, and remove the thermistor.

Figure 3-22. Removing the Thermistor

ASSEMBLY POINT

When reinstalling the thermistor, wire the harness as shown below.

Figure 3-23. Wiring

3-16 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

Paper Separator

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Release the lock of the holder, and remove the 3 paper separators.

Figure 3-24. Removing the Paper Separators

ASSEMBLY POINT

When reinstalling the paper separators, be careful of their positions, because the middle one differs from the others.

Paper Exit Sensor

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the paper exit sensor.

Figure 3-25. Paper Exit Sensor

Rev. A 3-17

Disassembly and Assembly EPL-5500W Service Manual

Fusing Roller

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the 2 G-rings from the fusing unit.

Figure 3-26. Removing the G-Rings

CAUTION

When reinstalling the G-rings:

❒ Be careful of the direction. ❒ Securely position them into the grooves of the fusing roller.

3. Remove the upper fusing roller drive gear.

4. Remove the upper fusing roller.

Figure 3-27. Removing the Upper Fusing Roller

3-18 Rev. A

EPL-5500W Service Manual Disassembly and Assembly

5. Take out the lower fusing roller.

Figure 3-28. Removing the Lower Fusing Roller

Thermal Fuse

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove 2 screws, and remove the thermal fuse.

Figure 3-29. Removing the Thermal Fuse

Rev. A 3-19

Chapter 4 Adjustment

Table of Contents

4.1 ADJUSTMENT 4-1

4.1.1 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

List of Figures

Figure 4-1. Print Position Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-ii Rev. A

EPL-5500W Service Manual Adjustments

4.1 ADJUSTMENTS

This section describes the adjustment procedures for the EPL-5500W. You must perform these adjustments after servicing the printer, especially when any component or part is replaced.

4.1.1 Print Position Adjustment

You can adjust the vertical print position on a sheet of paper by turning the image synchronizing volume control on the main board (C180 MAIN). After replacing a main board, be sure to adjust the print position using the procedure below.

1. Connect the EPL-5500W to LPT1 port of PC. And set the A4 size paper.

2. Install the EPL-5500W printer driver.

3. Set paper size to A4 setting by PCL Emulation Front Panel window.

4. Copy the adjustment printing data file lj4a4.bin to c:\ drive.

5. Open the DOS Prompt window.

7. Type the copy /b lj4a4.bin lpt1: , and then Enter. Printer print adjustment printing sheet.

8. Check that the registration gap between the leading edge of the sheet and the horizontal line printed on the page is within the following range:

4.2 ± 2.5 mm (0.17 ± 0.1 inches) for a adjustment printing sheet on A4 paper: If the gap is not correct, adjust the print position as described in the next few steps.

4.2 mm

Leading Edge

Figure 4-1. Print Position Adjustment

9. Turn printer power off.

10. Open the right cover and shield plate. (See Chapter 3.)

11. Adjust the image synchronizing adjustment volume (VR1) on the main board (C180 MAIN) so that the gap for the print position of the horizontal line (down from the top edge of the sheet) becomes 4.2 mm (0.17 inches) .

Turn VR1 clockwise to increase the gap for the print position of the horizontal line. Turn VR1 counterclockwise to decrease the gap.

12. Turn on the printer.

13. Print a adjustment printing sheet again (Step 7) to check the print position.

14. Repeat steps 8 to 13 until the print position is 4.2 mm (0.17 inches).

15. Reattach the shield plate and right case.

Rev. A 4-1

Chapter 5 Troubleshooting

Table of Contents

5.1 OVERVIEW 5-1

5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL 5-1

5.3 TROUBLESHOOTING 5-3

5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.2 Print Quality Anomaly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

List of Tables

Table 5-1. Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 5-2. Symptoms and Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-3. The Printer Does Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-4. Both LED Lights Do Not Come On. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-5. Clear Paper Jam (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-6. Clear Paper Jam (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Table 5-7. Check Toner & Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-8. Service Error (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-9. Service Error (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-10. Service Error (3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-11. Service Error (4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-12. Print Quality Anomalies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

EPL-5500W Service Manual Troubleshooting

5.1 OVERVIEW

The EPL-5500W has a sophisticated, built-in, self-diagnostic function that reduces troubleshooting time by identifying failed parts or components. This self-diagnostic test identifies the troubleshooting problems for page printers, in which even a trivial failure can result in a serious print quality problem.

5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL

This section describes the self-diagnostic function, in which the controller automatically checks the operating conditions of each component. If any abnormality is detected, the printer driver displays a message in the status window.

If an engine error is detected, the printer driver displays a “SERVICE CALL” message. This error message does not display error information details. To isolate the problem more, you must read the engine error status register of the printer using a special tool. This tool is program for Windows 3.1.

The procedure for using the program is as follows:

1. Connect the EPL-5500W to the PC’s LPT1 port, and power the printer on.

2. Start Windows 3.1.

3. If you are using the EPL-5500W printer driver, you must change it so that it does not direct output to a printer. (If you are not using the EPL-5500W printer driver, skip to step 9.)

CAUTION

The tool program cannot run if EPL-5500W printer driver output is directed a printer port in Windows 3.1, because the EPL-5500W printer driver and special tool both use an interface protocol program. The interface protocol program for the special tool cannot be active in Windows

3.1 while the interface protocol for the EPL-5500W printer driver is active.

4. Open the Main window in Windows 3.1.

5. Open the Printers window.

6. Select EPL-5500W.

7. Click the Connect button to change the Ports: selection in the Connect menu from LPT1: or LPT2: to FILE:.

8. Select another printer under the Installed Printers: list, and then click the Set As Default Printer button.

9. Run the SLEEKDBG.EXE file for the special tool from the Program Manager. Windows 3.1 opens the Cimarosa Debug Tool window.

10. Set the Port to LPT1 in the Cimarosa Debug Tool window.

11. Click the Read / Write Register button in the Cimarosa Debug Tool window. The Select Protocol Cimarosa window is opened.

12. Set the protocol to Peppy.

13. Type 000D in the Address box and 04 in the Data write box. Then click the Write button.

14. Type 000E in the Address box. And then click the Read button. The Data read box displays the error code.

The error codes are shown in Table 5-1 on the next page.

Rev. A 5-1

Troubleshooting EPL-5500W Service Manual

Table 5-1. Error Codes

Error Code Error Condition

0x02 Fan motor error 0x10 Scanner mirror motor error 0x13 Scanner mirror motor and fan motor error 0x20 Laser light error 0x23 Laser light and fan motor error 0x31 Laser light and scanner mirror motor error 0x40 Fusing unit error 0x43 Fusing unit and fan motor error 0x51 Fusing unit and scanner mirror motor error 0x52 Fusing unit, scanner mirror motor, and fan motor error 0x61 Fusing unit and laser light error 0x62 Fusing unit, laser light, and fan motor error 0x70 Fusing unit, laser light, and scanner mirror motor error 0x73 Fusing unit, laser light, scanner mirror motor, and fan motor error

5-2 Rev. A

EPL-5500W Service Manual Troubleshooting

5.3 TROUBLESHOOTING

This section describes troubleshooting abnormal operations and print quality problems.

5.3.1 Troubleshooting of Abnormal Operations

This section describes how to detect malfunctions, and determine their cause, and it suggests what actions to take for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting table.

Table 5-2. Symptoms and Reference Tables

Symptom Printer Condition

The printer does not operate at all. “Status not available” or “Check

printer / cable” is displayed.

“Clear paper jam” is displayed.

“Check Toner & Cover” is displayed.

“Service Call” is displayed.

The heater lamp in fusing unit does not come on, and so neither LED light is on.

“Status not available” or “Check printer / cable” is displayed by the printer driver interface.

“Clear paper jam” is displayed by the printer driver interface during power on.

“Clear paper jam” is displayed by the printer driver interface during printing.

“Check Toner & Cover” is displayed by the printer driver interface.

A fusing unit error is detected. (Refer to Section 5.2)

A fan motor error is detected. (Refer to Section 5.2)

A scanner motor error is detected. (Refer to Section 5.2)

A laser light error isdetected. (Refer to Section 5.2)

Reference

Table

5-3

5-4

5-5

5-6

5-7

5-8

5-9

5-10

5-11

Rev. A 5-3

Troubleshooting EPL-5500W Service Manual

Table 5-3. The Printer Does Not Operate at All

Cause Step Checkpoint Finding Solution

Connector CN207 on the C180 MAIN board may be disconnected.

The fuse on the PWB-E board may be blown.

PWB-E board may be dead. 3

C180 MAIN board may be dead.

Table 5-4. Both LED Lights Do Not Come On

Cause Step Checkpoint Finding Solution

The C180 MAIN board may be dead.

Table 5-5. Clear Paper Jam (1)

Is connector CN207 on the

C180 MAIN board disconnected?

Has the fuse blown on the

PWB-E board? With power on, is there an

output of +5 VDC between pin 4 (+) and pin 3 (–) for CN207 on C180 MAIN board?

4— —

If you replace the C180 MAIN

board, do the LEDs come on?

Yes

Yes Replace the fuse.

Yes

Connect CN207 on the board.

Replace the PWB-E board.

Replace the C180 MAIN board.

Cause Step Checkpoint Finding Solution

The paper take-up sensor flag position may be incorrect.

The paper exit sensor flag position may be incorrect.

The paper take-up sensor connector may be disconnected.

The paper exit sensor connector may be disconnected.

The paper exit sensor may be bad.

The paper take-up sensor may be bad.

Is the paper take-up sensor

flag position OK?

Is the paper exit sensor flag

position OK?

Is the paper take-up sensor

connector disconnected?

Is the paper exit sensor

connector disconnected?

5 — — Replace it.

6 — — Replace it.

Yes Connect it.

Reposition the paper take-up sensor flag.

Reposition the paper exit sensor flag.

5-4 Rev. A

EPL-5500W Service Manual Troubleshooting

Table 5-6. Clear Paper Jam (2)

Cause Step Checkpoint Finding Solution

Disconnect CN203 on the C180 MAIN board, and check the coil resistance between

The paper take-up solenoid coils may be open or shorted.

The main motor coils may be open or shorted.

pins 5 and 6 on the disconnected cable side of the connector using a multimeter. Is the resistance approximately 80 ohms?

If the coil is shorted, check the solenoid drive circuit using the procedure below:

1. Set the multimeter to voltage.

2. Place the (–) terminal of the multimeter on pin 5 of connector CN207 on the C180 MAIN board.

3. Place the (+) terminal of the multimeter on pin 6 (GND).

With power on, does the multimeter detect any current?

Disconnect CN206 on the C180 MAIN board, and check the coil resistance between pins 1 and 2 and between pins 3 and 4 (2 points total) on the

disconnected cable side of the connector using a multimeter.

Pin 1 — Pin 2

Pin 3 — Pin 4 Are the resistances of all four points approximately 10 ohms?

If any coil is shorted, check the main motor drive circuit using the following procedure:

1. Set the multimeter to

voltage.

2. Place the (–) terminal of

the multimeter on pins

1, 2, 3, or 6 of CN206 on the C180 MAIN board.

3. Place the (+) terminal on

pin 2 of CN207 on the C180 MAIN board

(GND). With power on, does the multimeter detect current?

Continued on next page

Yes

Replace the paper take-up solenoid.

Replace the paper take-up solenoid and the C180 MAIN board.

Replace the main motor.

Replace the C180 MAIN board.

Rev. A 5-5

Troubleshooting EPL-5500W Service Manual

Table 5-6. Clear Paper Jam (2) (Continued)

Cause Step Checkpoint Finding Solution

Paper take-up sensor flag position may be incorrect.

Paper take-up roller may be bad.

Cause Step Checkpoint Finding Solution

The interlock switch lever is bad.

The interlock switch may be bad.

The PWB-E board may be dead.

Cause Step Checkpoint Finding Solution

Is the paper take-up sensor

flag positionincorrect?

5— —

Yes

Table 5-7. Check Toner & Cover

Does the switch turn on when

the case is closed? Does the switch toggle?

(Check with a multimeter.) With power on, is there an

output of +24 VDC between

pin 1 (+) and pin 2 (–) for CN207 on C180 MAIN board?

Table 5-8. Service Error (1)

Reseat the paper take-up sensor flag.

Replace the paper take-up roller.

Replace the interlock lever.

Replace the interlock switch.

Replace the PWB-E board.

The connector for the thermistor may be disconnected.

The C180 MAIN board may be bad.

The heater lamp or thermal fuse in the fusing unit may be bad.

The PWB-E board may be dead.

Is the thermistor connector

disconnected? Does the heater lamp

remain lit up until the error occurs?

Does the heater lamp

come on at power on?

4— —

Yes Connect it.

Yes

Replace the C180 MAIN board.

Replace the heater lamp or thermal fuse in the fusing unit.

Replace the PWB-E board.

5-6 Rev. A

EPL-5500W Service Manual Troubleshooting

Table 5-9. Service Error (2)

Cause Step Checkpoint Finding Solution

Connector CN211 on the C180 MAIN board may be disconnected.

The fan motor may be bad. 2 — — Replace it.

Is CN211 on the C180 MAIN

board disconnected?

Yes Connect it.

Table 5-10. Service Error (3)

Cause Step Checkpoint Finding Solution

The optical unit may be bad. 1 — — The C180 MAIN board may

be bad.

2— —

Replace the optical unit.

Replace the C180 MAIN board.

Table 5-11. Service Error (4)

Cause Step Checkpoint Finding Solution

The optical unit may be bad.

The C180 MAIN board may be dead.

1— —

2— —

Replace the optical unit.

Replace the C180 MAIN board.

Rev. A 5-7

Troubleshooting EPL-5500W Service Manual

5.4.2 Print Quality Anomalies

This section describes how to isolate possible causes of a print quality problem.

Table 5-12. Print Quality Anomalies

Symptom Possible Cause Part Name Check Item Remedy

Low image density

Foggy background Poor develop-

Poor development

Image transfer problem

Defective PC drum

Improper print density setting

ment

Improper charging

PWB-F board —

Check to see if the Image transfer unit

PWB-F board — Photoconduc-

tor unit

——

Toner cartridge

Drum charge

surface of image

transfer unit is

damaged.

—

Check the wiring of

the PC drum charging

bias line.

Replace the PWB-F board.

Replace the image transfer unit.

Replace the PWB-F board.

Replace the photoconductor unit.

Adjust the print density using the printer settings.

Replace the toner cartridge.

Replace the PWB-F board.

Replace the photoconductor unit.

Improper print density setting

——

Adjust the print density using the printer settings.

5-8 Rev. A

EPL-5500W Service Manual Troubleshooting

Table 5-12. Print Quality Anomalies (Continued)

Symptom Possible Cause Part Name Check Item Remedy

Blank print

Black print

Poor development

Improper charging

Poor image transfer

Improper print density setting

Defective optical unit

Improper charging

Poor development

Imaging cartridge

PWB-F board —

Image transfer unit

PWB-F board —

——

Optical unit — Photoconduc-

tor unit PWB-F board — Toner

cartridge PWB-F board

Check whether the toner cartridge is installed properly.

Check the surface of the image transfer unit.

—

Reinstall the toner cartridge.

Replace the PWB-F board.

Replace the image transfer unit.

Replace the PWB-F board.

Adjust the print density using the printer settings.

Replace the optical unit.

Replace the photoconductor unit.

Replace the PWB-F board.

Replace the toner cartridge.

Replace the PWB-F board.

White/black lines and bands.

Improper print density setting

Defective optical unit

Improper charging

Poor development

Dirt on the fusing roller

Adjust the print

——

Optical unit —

Photoconductor unit

PWB-F board — Toner

cartridge Fusing roller — Clean the fusing roller.

—

density using the printer settings.

Replace the optical unit.

Replace the imaging cartridge.

Replace the PWB-F board.

Replace the toner cartridge.

Rev. A 5-9

Troubleshooting EPL-5500W Service Manual

Table 5-12. Print Quality Anomalies (Continued)

Symptom Possible Cause Part Name Check Item Remedy

Toner smudges on the back side of the sheet.

Offset print

Improper charging

Poor development

Improper fusing Fusing unit —

PWB-F —

Replace the PWB-F board.

Replace the fusing unit.

White spots

Poor image transfer

Image transfer unit

PWB-F —

—

Replace the image transfer unit.

Replace the PWB-F board.

5-10 Rev. A

Chapter 6 Maintenance

Table of Contents

6.1 MAINTENANCE 6-1

6.1.1 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1.2 Replacement of Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.1.2 Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.1.2.1 Periodic Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.1.2.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

List of Figures

Figure 6-1. Position of the Special Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Figure 6-2. Cleaning the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

List of Tables

Table 6-1. Periodic Service Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Table 6-2. Cleaning Parts and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6-ii Rev. A

EPL-5500W Service Manual Maintenance

6.1 MAINTENANCE

The EPL-5500W is a page printer that uses an electrophotographic printing method. Unlike most impact or ink-jet printers, the key components in the electrophotographic process are integrated into two expendable units (the photoconductor unit and toner cartridge). Therefore, periodic replacement of them is essential to ensure high-quality output. Other maintenance items are also described in this chapter, which is divided into two sections: user maintenance (preventive maintenance) and service maintenance (repair).

6.1.1 User Maintenance

Users can achieve maximum print quality from the printer by following the procedures below:

6.1.1.1 Cleaning

This section describes the cleaning required for optimal print quality. ❒ External Cleaning Be sure to disconnect the printer from the power outlet before cleaning it. Wipe the cover and external parts

of the printer with a damp cloth that has been soaked in a neutral cleaning solution. ❒ Internal Cleaning Be sure the printer has been disconnected from the power supply and that the fusing unit has cooled down. If

the electrode comb of the image transfer unit is dirty, clean it with a special tool, using the following steps:

1. Pick up the electrode comb cleaner from the upper unit.

2. Wipe the electrode comb surface from end to end with the electrode comb cleaner several times.

Figure 6-1. Position of the Special Tool

Electrode Comb Cleaner

Cleaner Section

Pre-image Transfer Roller Image Transfer Rear

Guide

Figure 6-2. Cleaning the Electrode Comb

Rev. A 6-1

Maintenance EPL-5500W Service Manual

6.1.1.2 Replacement of Consumables

This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductor unit is 20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-size pages with a 5% print ratio.

If printed images become faint, remove the toner cartridge and gently shake it. This will distribute the toner and may make the images darker. If the image is still too light, replace the toner cartridge cartridge.

If the printed image remains faint after you have replaced the toner cartridge, change the photoconductor unit.

6-2 Rev. A

EPL-5500W Service Manual Maintenance

6.1.2 Service Maintenance

This section describes the periodic service maintenance and the cleaning required.

6.1.2.1 Periodic Service Maintenance

The following units need service maintenance periodically, because they are subject to functional deterioration as the total number of printed pages increases, resulting in bad print quality.

Table 6-1. Periodic Service Maintenance

Unit Service Interval

Image transfer unit Approx. 100,000 pages Fusing unit Approx. 100,000 pages

The service interval listed above is only a reference value. You do not need to perform service maintenance exactly at this time.

6.1.2.2 Cleaning

Some parts of this printer require regular cleaning. Clean each part using the specified method and tools. (Refer to Chapter 3 for disassembly procedures.)

Table 6-2. Cleaning Parts and Procedures

Parts Name Cleaning Procedure

Paper take-up roller Wipe the surface with a dry soft cloth. Upper fusing roller (in fusing unit) Lower fusing roller (in fusing unit) Thermistor (in fusing unit) Paper separator and rollers (in fusing unit)

Dip a soft cloth in silicon oil and wipe the dust off.

Dip a soft cloth in denatured alcohol and wipe the dust off.

Rev. A 6-3

Maintenance EPL-5500W Service Manual

6-4 Rev. A

Appendix A Reference Materials

Table of Contents

A.1 CONNECTOR PIN ASSIGNMENTS A-1

A.1.1 Main Board (C180 MAIN-B Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.2 CIRCUIT DIAGRAM A-7

A.3 CIRCUIT BOARD COMPONENT LAYOUT A-12

List of Figures

Figure A-1. Connector Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Figure A-2. C180 MAIN Circuit Diagram (1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Figure A-3. C180 MAIN Circuit Diagram (2/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

Figure A-4. PWB-E (120V) Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Figure A-5. PWB-E (220/240V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . A-11

Figure A-6. C180 MAIN Component Layout (Side A) . . . . . . . . . . . . . . . . . . . A-12

Figure A-7. C180 MAIN Component Layout (Side B) . . . . . . . . . . . . . . . . . . . A-13

List of Tables

Table A-1. Board Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Table A-2. CN2 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table A-3. CN202 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-4. CN203 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-5. CN204 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-6. CN205 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-7. CN206 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-8. CN207 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-9. CN208 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-10. CN209 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-11. CN210 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-12. CN211 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

EPL-5500W Service Manual Appendix

A.1 CONNECTOR PIN ASSIGNMENTS

Figure A-1 illustrates the interconnection of the primary components. Table A-1 gives the size and a description of each connector.

Main Mo tor

Polygon Motor

Fan Motor

CN1M

2 3

Paper Exit Sen sor

CN3S

3 2

PC3

Paper Take- up Sensor

CN1S

3 2

PC1

Paper Take-up Solenoid

SL1

Fusing Roller Thermist or

TH1

CN2S

CN206

CN210

POLYGON CTL

5 VDC

GND

24 VDC

CN211

FAN

24 VDC

CN208

ANO DE (PC 1)

GND

PC3

CN203

ANODE (PC1)

GND

PC1

24 VDC

FEED1

1212

CN202

12THERMISTOR

5 VDC

C180 MAIN Board

DC5V

L DATA

LD APC1 (LDVR1) LD APC1 (LDVR2)

GND

S SCAN

CN2

CN205

7 6

5 4 3

2 1

CN1D

1 2

3 4 5

6 7

HOST PC

PWB-D

Laser Diode Drive Board

Image Transfer Housing

Image Transfer Charger

PWB- F High

Voltage Unit

Paper Take-up Solenoid

CN1F

8 7

6 5

SL2

PWB-S

6 5

1 2

2nd Paper Fe eding Unit ( Op tion al)

PWB-A

24 VDC FEED2

1 2

3 4

CN1A

CN204

CN209

11 10

8 7 6

5 4

3 2 1

HV C

HV T

HV SEL1

HV SEL2

HV B

BIAS MON

GND

24 VDC

FEED2

5 VDC

GND

P EMP2

78PSIZE0

2NDBIN

910mm/inches

UNIVERSAL

118CHECK1

CHECK2

FUSER LAMP

24 VDC

GND

5 VDC

CN207

1 2

3 4 5

Figure A-1. Connector Connections

CN1E

1 2

3 4 5

HEAT N

HEAT L

PWB-E

Power Unit

CN3E

1 2

Fusing Roller Thermal Fuse

Interlock Switch

Inlet Board

Fusing Roller Heater Lamp

TF1

Power SW

Inle t

Rev. A A-1

Appendix EPL-5500W Service Manual

Table A-1. Board Connector Summary

Connector Description Pins Reference

Main Board (C180 MAIN Board)

CN1 Video interface (not used) 20 pins — CN2 Centronics parallel interface 36 pins Table A-2

CN202 Connector for thermistor 2 pins Table A-3 CN203

CN204 CN205 Connector for optical unit 7 pins Table A-6

CN206 Connector for motor 4 pins Table A-7 CN207 Connector for power supply board (PWB-E board) 5 pins Table A-8 CN208 Connector for paper exit sensor 3 pins Table A-9 CN209 Connector for lower paper cassette 12 pins Table A-10 CN210 Connector for optical unit 5 pins Table A-11 CN211 Connector for fan 2 pins Table A-12

Power Supply Board (PWB-E Board)

CN1 Connector for AC power inlet 4 pins — CN2 Connector for main board 5 pin Table A-8 CN3 Connector for heater lamp 3 pins —

High-Voltage Supply Board (PWB-F Board)

CN1 Connector for main board 8 pins Table A-5 CN2 Connector for paper take-up sensor 3 pins —

Connector for paper take-up solenoid and paper take-up sensor

Connector for high-voltage supply board (PWB-S and PWB-F board)

6 pins Table A-4

8 pins Table A-5

A-2 Rev. A

EPL-5500W Service Manual Appendix

A.1.1 Main Board (C180 MAIN Board)

Table A-2. CN2 Pin Assignments

Pin No. Signal Name I/O Description

1 STROBE I STROBE signal 2 DATA1 I Data bit 1 3 DATA 2 I Data bit 2 4 DATA 3 I Data bit 3 5 DATA 4 I Data bit 4 6 DATA 5 I Data bit 5 7 DATA 6 I Data bit 6 8 DATA 7 I Data bit 7

9 DATA 8 I Data bit 8 10 ACKNLG O ACKNLG signal 11 BUSY O BUSY signal 12 PE O PE signal 13 SLCT O SLCT signal 14 AUTO-FEED I AUTO-FEED signal 15 NC — Not connected 16 GND — GND

17 18 NC — Not connected

19 GND — GND 20 GND — GND 21 GND — GND 22 GND — GND 23 GND — GND 24 GND — GND 25 GND — GND 26 GND — GND 27 GND — GND 28 GND — GND 29 GND — GND 30 GND — GND 31 INIT I INIT signal 32 ERROR O ERROR signal 33 GND — GND 34 NC — Not connected 35 +5 — +5 VDC 36 SLCT IN I SLCT IN signal

CHASSIS GND

—

CHASSIS GND

Rev. A A-3

Appendix EPL-5500W Service Manual

Table A-3. CN202 Pin Assignments

Pin No. Signal Name I/O Description

1 +5 — +5 VDC 2 TH I Fuser temperature

Table A-4. CN203 Pin Assignments

Pin No. Signal Name I/O Description

1 PS1 I Paper take-up sensor 2 GND1 — Ground 3 4 NC — Not connected 5 +24V — +24 VDC 6

PS1 I Paper take-up sensor

FEED1 O Paper take-up solenoid drive

Table A-5. CN204 Pin Assignments

Pin No. Signal Name I/O Description

1 2 3 4 5 6 7 GND2 — Ground 8 +24 — +24 VDC

HV-C — HV-T I HV-S — HV-S2 — HV-B BIAS-M O

Table A-6. CN205 Pin Assignments

Pin No. Signal Name I/O Description

1 2 LD-CTL I Laser power signal 3 LDAPC2 O Laser power adjust 2 4 LDAPC1 O Laser power adjust 1 5 GND1 — Ground 6 7 +5V — +5 VDC

SSCAN I Horizontal synchronous signal

LDATA O Laser data

Table A-7. CN206 Pin Assignments

Pin No. Signal Name I/O Description

1 A O Motor phase A 2 3 B O Motor phase B 4

A-4 Rev. A

A O Motor phase A

B O Motor phase B

EPL-5500W Service Manual Appendix

Table A-8. CN207 Pin Assignments

Pin No. Signal Name I/O Description

1 +24V — +24 VDC

2 GND2 — Ground

3 GND1 — Ground

4 +5V — +5 VDC

FUSER O Heater lamp on

Table A-9. CN208 Pin Assignments

Pin No. Signal Name I/O Description

1 PS3 I Paper exit sensor

3 GND — Ground

PS3 I Paper exit sensor

Table A-10. CN209 Pin Assignments

Pin No. Signal Name I/O Description

1 +24 V — +24 VDC

3 NC — Not connected

4 +5V — +5 VDC

5 GND1 — Ground

7 PSIZ0

8 PSIZ1

9 PSIZE2 10 CHECK1 11 CHECK2 12 CHECK3

FEED2 O Lower cassette solenoid on

PE2 I Lower cassette paper empty

Table A-11. CN210 Pin Assignments

Pin No. Signal Name I/O Description

1 NC — Not connected

2 +24V — +24 VDC

3 GND2 — Ground

4 +5V — +5 VDC

5 P-CTL O Polygon motor control

Table A-12. CN211 Pin Assignments

Pin No. Signal Name I/O Description

1 +24V — +24 VDC

Rev. A A-5

FAN O Fan control

Appendix EPL-5500W Service Manual

A-6 Rev. A

EPL-5500W Service Manual Appendix

A.2 CIRCUIT DIAGRAMS

Figure A-2. C180 MAIN Circuit Diagram (1/2)

Rev. A A-7

Appendix EPL-5500W Service Manual

A-8 Rev. A

EPL-5500W Service Manual Appendix

PS1

FEED1

PS3

400mA

IC203A

GND1

C240

116

P3460P16

GND

CN208

0.01U 220 1/4W

R214

47K

R216

ULN2003A

C216

0.01U

P14

PE2

CHECK2

CHECK3

GND1

PSIZ0

PSIZ1

PSIZ2

FEED2

CHECK1

+24V

+5V

CN209

4.7K

R233

R234

RM202

4.7K

R236

47K

P1345P1048P1147P1246P35

IC203G

C220

C219

C218

C217

400mA

710

1000P

C225

1000P

C226

1000P

0.1U

C242

C227

1000P

C241

0.01U

C234

ULN2003A

512

215

IC203E

P73 8P0551P06

P55/CNTR1

IC203C

P61/AN6

ULN2003A

314

IC203F

ULN2003A

IC203B

P2535P2634P27

P80/DA3

+24V

TODX

EPRDYX

PRRDYX

ETBSYX

HSYNCX

VIDEOX

3.3K

RM201

6 7

2 1

R212

2.2K

R211

10K

R208

2.2K

P33

STSX

CMDX

CTBSYX

CPRDYX

PRINTX

P32

P20

P2139P23

P42/IN T0

P30/RTP664P31/RTP7

RESETX

SRCLKX

0.1U

C207

C257

7C 5

IC251

TP20 4

RESET

P45/TXD

P44/RXD

P46/SCLK1

CN203

10P

220 1/4W

R213

C256

0.01U

47K

R215

C255

0.01U

C254

0.01U

GND

VCC

OUT

M51953AFP

1NC 2NC 3NC 8

P15

HV_S2

CN204

1000P

ULN2003A

611

D201

1SS226

R204

39K

BIAS_M

GND2

+24V

HV_C

HV_S

HV_T

HV_B

C221

R205

6.8K

C215

P74

1000P

C222

1000P

C223

1000P

C224

1000P

C228

1000P

GND

IC203

1000P

C233

R223

TP20 5

0.1U

2003X

100K

C213

0.022U

C202

0.1U

R290 10K

P17

VCC

VSS

AVSS

CNAVSS

ADVRE F

AMPVCC

P65/AN11/DAVREF

P64/AN10/AMP-

P54/CNTR0

P72/SCLK2

IC201

C253

2.2K

R207

C239

0.01U

P00

P86/RTP4

P56/DA1

P53/INT4

P71/SOUT2

P70/SIN2

R291

C252

1000P

IC202C

4700P

R253

P57/DA2

P60/AN5

10K

R296

10K

74HC02

IC202D

R254

R206

680

C258

+5V

SSCAN

LDATA

LDAPC1

LD_CTL

LDAPC2

CN205

P75/AN2

P81/DA4

P76/AN3

P04

VR201

10K

C235

1000P

C236

1000P

C237

1000P

C238

1000P

PLACE NEAR CN 2 05

0.1U

C259

+5V

+24V

GND2

GND1

P_CTL

CN210

P63/AN9/AMP+

C251

1000P

1.0K

R209

C229

1000P

C230

1000P

C231

1000P

C232

1000P

PLACE NEAR CN210

0.1U

C243

0.1U

CN202

P37

P77/AN4

3.0K

R210

FB1L3N

DT201

R226

C206

1000P

R203

3.0K 1.0%

+5V

CN211

R227

200mA

FAN

+24V

AMPOUT

XIN

P02

R295

10K

74HC02

IC202B

74HC02

IC202A

C214

1000P

47K

6.8 1/4W

TP202

IC202-14

4 13

C203

ULN2003A

IC203D

IC202-7

TP20 1

+5V

+24V 1GND2

FUSER

CN207

XOUT

CR201

8MHz

22P

C204

C205

0.1U

C201

220U/16V

22P

R293

10K

R292

IC204

TP203

GND1

P82/RTP0

P83/RTP1

P84/RTP2

10K

8I0 9I1 7

15MB 1

16C 10T 2

1 1/2W

R221

P85/RTP3

VMM 3VMM14VCC

R224

P07

P22

P24

P36

P40

P01

P03

P41

P43/INT1

P47/SRD71

P50/TOUT

P51/INT2

P52/INT3

P62/AN7

P87/RTP5

R219

2.7 1/4W

VCC11GND 4GND 5GND

820P

C210

10K

R237

R238

GND

TEA3718SDP

820P

56K

R217

C208

CN206

M3807X

C212

47U 35V

VMM 3VMM14VCC 6VCC11GND 4GND

1 1/2W

R225

R222

2.7 1/4W

GND12GND

TEA3718SDP

10T 2

R220

820P

56K

C209

R218

C211

8I0 9I1 7

IC205

15MB 1

A 1A

B 3B

Figure A-3. C180 MAIN Circuit Diagram (2/2)

Rev. A A-9

6.3A, 125V

470K

0.22uF

125V

NR1

ENC271D-10

Z7D271

Z0408, Z0462

C3, C4

2200pF

125V

0.1uF

125V

BD1

D258A50

D2S860

Th1

100-g,

M100 10C,

M10007C

NTH9D100LA

C19

0.01u

250V

R24

100K

0.5W

EU2A, A GIC

ERA22-06

220K -180K

0.25WR5390K

0.25W

2SK1445

2SK1446

4.7

2200pF

125V

330uF

200V

680p

1kV

500V

R5222W

L10

ZD2

HZS15

R11

68K

D1207

C1213

C1815

PC1

PC817

0.01uF

50V

680

0.5W

10K

ZD1

HZS18

-20

R10

22K

R25

18K

C10

4700pF

50V

Z0496

YG 90 1C 2

D5LC 2 0U

YG801C4

D5SC4M

FMB-24M

C17

3300uF

10V

C15

1000uF

35V

C16

1000uF

35V

R27

1.2K

0.5W

R19

1.2K

0.5W

R20

1.2K

0.5W

R26

1.2K

0.5W

Z0400

SCR 1

TF 32 15

2P4M

ZD4

HZS27

ZD3

HZS6

R29

R30

C21 1uF, 50V

R22

100

0.5W

342

SW2

AM 5166 2A 531

CN1

+24V

+24V GN D

+5V G N D

+5.1V

H.L

R121K0.25W

R21

0.25W

PC2

S21MD4V

S21ME4F

ERAG1-21

1SS81

R28

R12

1.2K

C14

0.047uF

50V

R14

330

PC1

PC917

IC1

L5431

TL431

uPC1093

HA17431

C13

0.1uF

50V

R15

47K

VR1

R15

1.8K

0.1uF

125V

L11

Z0068

TRC

TM8415

SM8GZ47

4.7

CN3

53259-0320

Appendix EPL-5500W Service Manual

Figure A-4. PWB-E (120 V) Circuit Diagram

A-10 Rev. A

Epson EPL-5500W User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

SAFETY INFORMATION

REVISION SHEET

TABLE OF CONTENTS

Chapter 1 General Description

1.2 SPECIFICATIONS

Chapter 2 Operating Principles

Chapter 3 Disassembly and Assembly

Chapter 4 Adjustment

Chapter 5 Troubleshooting

Chapter 6 Maintenance