Epson EPL-5500 User Manual

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EPSON TER M INAL PR INTER

EPL-5500

SERVICE MANUAL

EPSON

4005431

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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 not withstandi ng SEIKO EPSON can assume no responsibil ity for any error s in this

manual or the consequence thereof. Epson is a registered trademark of Seiko Epson Corporation.

General N ot ice:

be trademarks of their respective campanies.

Other product names used herein are for ident ication purposes only and may

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PRECAUTIONS

Precautionary not ati ons throughout t he t ext ar e c at egor ized relative to 1) personal injury and 2) damage to equipment.

DANGER

WARN ING

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

Signals a precautio n which, if ignored, could result in seri ous or fatal personal injur y. Great ca ution s hould be exercised i n performing procedures pr eceded by DANGER Headi ngs.

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

DANGER

1. ALWAY S D ISCON NECT T HE PRODU CT FROM B OT H THE P OWER SO URCE AN D PERI PHERAL 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 TECHNICI ANS IN THEIR LINE OF WO RK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNI T TO A POW ER SOU RCE UNTIL IN STR UCTED TO DO SO. WHEN THE PO WER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWE R SUPPLY AND OTHER EL ECTRONI C COMPONENTS.

WAR NING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORM ED ONLY BY AN EPSON CERTIFIED REPAIR T ECHNICI AN.

2. MAKE C ERTAIN THAT THE SOURCE V OL TAGE IS THE SAME AS THE RAT ED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMA RY AC R ATI NG D IFFE RENT FRO M AV AILA BLE POW ER SOUR CE , DO NOT C ON NECT IT TO THE POWER SOURCE.

3. ALWAY S VERIFY THAT THE EPSON PRO DUCT HAS BEEN DISCONN E CTED FROM T HE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/O R INDIVI DUAL CHI PS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCH ARGE EQ UIPM ENT, S UC H AS A NTI -STAT IC WRI ST S TRAPS, WH EN ACCES SIN G 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.

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SAFET Y 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 radiation em itted by the laser is completely confined with in protective housings, 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 Healt h and Safety Act of 1968. Thi s means that the printer does not produce hazardous laser radiation.

[CDRH Reg u lations ]

The Center for Devices and Radiologica l Health (CDRH) of the U.S. Food a nd Drug Administr ation implemented regul ati ons for laser product s 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 at tached 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 × 10-4 (W) Wave Length: 790 ± 20 nm

This is a Class IIIb Laser Diode Assay that has an invisi ble la ser beam. The print head unit is NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under any circumstances .

For Other Countr ies Users;

WARNING: Use of controls, adj ustments or performance of pro cedures other

than those specified in this manual may result in hazardous radiation exposure.

This is a semiconductor laser. The maximum power of the laser diode is 5.0 × 10-4 W and the wavelength is 790 ± 20 nm.

For Denmark Users;

ADVARSEL

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

Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene.

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For Finland , Sweden User s;

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 1.

For Finland , Sweden Ser vice Peop le

VAROITUS

Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.

VARNING

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

For Norway Users;

ADVARSEL

Dersom apparat et brukes på anne n m åte enn s pesi fi sert i denne br uksanv isning, 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 × 10-4 W og 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

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For Europe

[Label inside printer]

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

For Denmark, Finl and, Sweden, and Norway

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PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of EPL-5500. The instruct ions and proc edur es included herein are intended f or the experi ence rep air technici an, and attenti on should be given t o the prec autions on the preceding page. The chapters are o rganized as follows:

CHAP TER 1. GENERAL DESC RIPTION

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

CHAP TER 2. OPERATING PR INCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMB LY AND ASSEMBLY

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

CHAP TER 4. ADJUSTMENTS

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides Epson-approved techniques for adjustment.

CHAP TER 6. MAINT E NANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to service 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.

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REVISION SHEET

Revision Issue Date Revision Page

Rev. A October 06, 1995 1st issue

Revise the whole pages of the following chapters:

Chapter 1

Rev. B March 15, 1996

Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6

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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

1.3.1.1 Compatibility Mode of Parallel Interface . . . . . . . . . . . . . . . . . . . . 1-9

1.3.1.2 Reverse ModeMode Signal Timing . . . . . . . . . . . . . . . . . . . . . . . 1-11

1.3.2 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.3.3 Optional LocalTalk Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

1.4 OPERATING INSTRUCTIONS 1-18

1.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

1.4.2 Printer Settings Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

1.4.3 Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

1.4.3.1 Heaxadecimal Dump Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

1.4.3.2 EEPROM Initialize Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

1.4.3.3 Factory Reset Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

1.4.3.4 Default Setting Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

1.4.4 Display of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

1.4.4.1 Status Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

1.4.4.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

1.4.4.3 Service Call Error Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

1.4.5 Printer Sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

1.4.5.1 Port Fixed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

1.4.5.2 Auto Sense Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

1.4.6 Emulation Mode Switch Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

1.4.6.1 Emulation Switch by SPL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

1.4.6.2 Intelligent Emulation Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

1.4.7 Bi Resolution Improvement Technology . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

1.4.8 Toner Save Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

1.4.9 Optional Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

1.5 MAIN COMPONENTS 1-32

1.5.1 C169 MAIN-B Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

1.5.2 PWB-E Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

1.5.3 PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

1.5.4 Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

1.5.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

1.5.6 Photoconductor Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

1.5.7 Developing Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

1.5.8 Lower Paper Cassette Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

List of Figures

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

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

Figure 1-3. Compatibility Mode Signal Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Figure 1-4. Parallel Interface State Switch Diagram. . . . . . . . . . . . . . . . . . . . . 1-12

Figure 1-5. Negotiation Timing Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Figure 1-6. Timing Chart of Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Figure 1-7. Termination Timing Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-8. Timing Chart of Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-9. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Figure 1-10. Port Fixed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Figure 1-11. Auto Sense Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Figure 1-12. Emulation Switch by SPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

Figure 1-13. Intelligent Emulation Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

Figure 1-14. Effect of RITech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

Figure 1-15. RITech Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

Figure 1-16. Toner Save Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

Figure 1-17. Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

Figure 1-18. C169 MAIN - B Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

Figure 1-19. PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

Figure 1-20. PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

Figure 1-21. Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

Figure 1-22. Fusing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

Figure 1-23. Photoco nduct or Uni t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

Figure 1-24. Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

List of Tables

Table 1-1. Options for the EPL-5500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. Differences between EPSON GL/2 and GL/2 in the HP LaserJet 4

Emulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Table 1-7. Built-in Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Table 1-8. Parallel Interface Pin Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Table 1-9. Parallel Interface Pin Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Table 1-10. Serial Interface Connector Pin Assignments . . . . . . . . . . . . . . . . . 1-15

Table 1-11. LocalTalk Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . 1-17

Table 1-12. Printer Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Table 1-13. Service MOde Select Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Table 1-14. Default Settings Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Table 1-15. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Table 1-16. Differences in Components for the C169 MAIN-B Board . . . . . . . 1-33

Rev. A 1-iii

EPL-5500 Service Manual General Description

1.1 FEATURES

The EPSON EPL-5500 is non-impact page printer that combines a semi-conductor laser with electrophotographic technology. This printer is small and light, and features high-speed, high-resol ut ion print ing. Mai nte nance is ver y easy as a result of various built-in di agnos t ic functions. The main features are:

❏

No ozone Printing speed — 6 ppm (pages per minute)

❏

Resolution — 600/300 dpi (dots per inch)

❏

Light weight — about 5 kg (11 lb)

❏

Small footprint

❏

Low running cost: separation of the development/toner cartridge and photoconductor unit

❏

HP LaserJet 4 emulation mode

❏

22 built-in scalable fonts (8 Agfa and 14 TrueType fonts)

❏

High-performance controller (the controller’s CPU is a 22.5 MHz SPARKlite (MB86933H))

❏

Bi Resolution Improvement Technology (BiRITech) refines the print quality by eliminating

❏

jagged edges from images and characters on 600 dpi and 300 dpi printing Memory Improvement Technology suppor ted

❏

Optional EPSONScrip t Level 2 (PostScript compatible) module

❏

Optional WPS (Windows Printing System) ROM SIMM module

❏ ❏

Optional I239X, ESC/P 2 , and FX emulation ROM SIMM module EPSON Micro Gray Technology (EMGTech), which is available when using PCL and

❏

EPSONScript Level 2 mode, refines gray scale printing to be comparable to printing on a 1200-dpi printer

❏

Small and low-cost optional LocalTalk with ser ial interface module 1MB standar d RAM and memory expansion availabl e up to 32MB of RAM with the addition of

❏

opt ional SIM M s Bidirectional parallel interface

❏

Toner-saver mode supported

❏

A multi-user, multi-emulation mode

❏

IES (Intel li gent Emul ation Switch) allows switching between EP SONScript mode and another

❏

mode SPL (Shared Printer Language) enabl es switching of the printer mode by command

❏

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

Figure 1-1. Exter ior View of the EPL-5500

Rev. B 1-1

General Descript ion E PL-5500 Ser vice Manual

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

Table 1-1. Optio ns for the EPL-5500

Cat. No. Description Note

C83218✽

C83219✽

C83220✽

—

C812491

S050005 Developer cartridge Develo per and toner cartridge

S051029 Photoconductor unit — C82334✽ LocalTalk with serial I/F module (see Note 3) C83614✽ Interface cable RS-232C extens ion cable for C82334✽ C82335✽ Type-B EX box Type-B I/F card box (see Note 4)

Windows Printing System ROM SIMM Supports Window s Printi ng System EPSONScript Level 2 ROM SIMM Supports EPSONScript Level 2 mode

(PostScript Level 2 compatible) fonts and commands (see Note 1)

LQ/FX/I239X ROM SIMM Supports ESC/P 2, FX, and IBM

2390/2391 emulation modes

NLSP Bitmap 2 font ROM Supports local NLSP bitmap fonts

(see Note 2)

NLSP Scalable font ROM Suppor ts local NLSP scalable fonts

(see Note 2)

250-sheet lower paper cassette for the EPL-5500 (A4/B5)

Lower paper cassette

C82307✽/

C82308✽

C82310✽/

C82311✽ C82312✽ LocalTalk card ( see Not e 5)

C82313✽ GPIB card (see Note 5) C82314✽ COAX interface card (see Note 5) C82315✽ TWINAX interface card (see Note 5) C82324✽ Ethernet interface card for NetWare C82328✽ FAX card (see Note 5) C82331✽ Multi protocol Ethernet card (see Note 5)

Notes:

1. Requires added memory (RAM) over a total of 2 MB, including standard RAM.

2. NLSP font ROMs do not support ESC/P 2 and FX modes.

3. LocalTalk with ser ial I/F module (C82334✽ ) cannot be used with Type-B EX box (C82335✽).

4. Type-B EX box (C82335✽) cannot be used with LocalTalk with serial I/F module (C82334✽) .

5. Type-B EX box (C82335✽) must be installed while usin g the Type-B I/F card.

32 KB serial interface card (see Note 5)

32 KB parallel interface card (see Note 5)



(see Note 5)

1-2 Rev. B

EPL-5500 Service Manual General Description

1.2 SP ECIFICAT IONS

This section provi des statisti cal data for the EPL-5500.

1.2.1 Basic Specifications

Printing method: Laser beam scanning and dry electrophotogra phy Resolu tion: 600/300 dpi Printing speed: 6 ppm (letter/A4) First printing ti me (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

Capacity Using

Paper Supply

Standard built-in paper tray 150 A5, B5, A4, LT,

Manual feed slot 1 Any size feedable

Lower paper cassette (optional) 250 A4, B5 16 to 24 lb.

Notes:

The weight in pounds (lb) is determined by the weight of 500 sheets cut to 17 × 22 inches; 1 g/m2 = 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)

20 lb. (75 g/m2)

Paper

5 to 10 Monarch,

Pap er Si z e

GLT, EXE, LGL, GLG, F4, HL

DL, C5, C6, International B5, Commercial-10

(Note 2)

Usage Thick ness

(Ream Weight)

16 to 24 lb. (60 to 90 g/m2)

Envelopes made of 20 to 24 lb. (75 to 90 g/m2) paper

16 to 42 lb. (60 to 157 g/m2)

(60 to 90 g/m2)

Paper types: See Table 1-3.

Table 1-3. Paper Types

Rev. B 1-3

General Descript ion E PL-5500 Ser vice Manual

Standard paper Xerox 4024 DP paper

20 lb (75 g/m2)

Normal paper Regular photocopier paper

Bond paper Recycled paper 16 to 24 lb (60 to 90 g/m2)

Special papers Card stock (90 to 157 g/m2)

Envelopes Labels Letterhead Transparency (OHP) sheets Colored paper

4.0 mm

Printable Area

4.0 mm4.0 mm

Figure 1-2. Printable Area

4.0 mm

1-4 Rev. B

EPL-5500 Service Manual General Description

Usability of special papers: See Table 1-4.

Tab le 1- 4. Usabi li t y of S pecial Pa pers

Input OHP Envelopes Labels Card Stock Letterhead

Standard built-in paper tray

Manual feed slot P P P P R Lower paper cassette N N N N P 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) Printa ble area (standard paper): See Figure 1-2.

Note:

Noise: Less than 35 dB(A), standby

Ozone density: Less than 0.01 ppm Toxici ty: No toxicity e xists i n organi c photoconduct or (OP C), toner,

The actual printable area depends on the printer mode.

PPPPR

Less than 47 dB(A), operating

or plastic material s

Rev. B 1-5

General Descript ion E PL-5500 Ser vice Manual

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 Rated frequency range Input frequency range Power consumption Less than 500 W Less than 600 W Power consum ption while in

standby mode

90 ∼ 132 VAC 198 ∼ 264 VAC

50 ∼ 60 Hz 47 ∼ 63 Hz

Less than 15 W (witho ut option)

1.2.3 Reliability Specifications

MPBF (Mean Prints Between Failures ): Over 25,000 sheets

Note:

MTBF (Mean Time Between Failures): 3000 power on hours (POH) Jam rate: 1 out of 2,000 sheets or le s s (excluding multip le-s heet feeding) Feed failure: 1 out of 2,000 sheets or le ss (excludi ng multip le-sheet fe eding) 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 180,000 sheets

MPBF indicates average number of pages printed bef ore occ urrence of pr oblem requiring replacement or service.

1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge)

Temperature: Humidity: 15 to 85% RH

Altitude: 2,500 m (8,200 feet) or lower Levelness:

Illuminance: 3,000 lux or less (Must not be exposed to direct sunl ight.) Surrounding space: Printer should have at least 100 mm of clearance on its

10 to 35° C (50 to 95° F)

1°

sides and rear.

1.2.5 Environmental Conditions for Storage and Transportation

Temperature: 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

Resistance to atmospheric pressure: More than 61.3 KPa Storage life: 18 m onths (followi ng date of manufactur e)

0 to 35° C (32 to 95° F)

Acceleration 1 G Acceleration direction 3 direction

1-6 Rev. B

EPL-5500 Service Manual General Description

1.2.6 Ap p licab le St andards

Safety Sta ndards

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)

12 0 VAC model: FDA (NCDRH) Class 1 220/240 VAC model: VDE 0837 (Laser Class 1) (IEC825), SETI (IEC 825) , 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 3,3 0)

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

Others

Toner: No effect on human health (OSHA-TSCA, EINE CS) 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: Develo per and toner cartridge: 3,000 pages

Photo conductor unit : 20,000 pages

Note:

In continuous printi ng mode wit h A4/letter p aper at a 5% image ratio (black/whi te ratio). The life varies, depending on the printing mode (continuous or intermittent) and/or the image ratio.

Environmental Conditions for Storage and Transportation

Temperat ure: Humidity: 30 to 85% RH Drop test: Height 76 cm (30.4 inches)

Vibration: Same as printer Resistance to atmospher ic pres sure: More than 74 Kpa Storage term: 18 months (following date of manufacture)

0 to 3 5° C (32 to 95° F)

1.2.8 Physical Specifications

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

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

Rev. B 1-7

EPL-5500 Service Manual General Description

1.2.9 Software Specifications

Built-in modes: HP LaserJet 4 emulation (P CL 5e)

EPSON GL/2 mode (GL-like mode)

Note:

EPSON GL/2 mode is similar to the GL/2 mode included in the HP LaserJet 4 emulation. Table 1-6 shows the differences between EPSON GL/2 mode and the LJ4 GL/2 mode. While in EPSON GL/2 mode, the operator can enter GL/2 mode without sending the ESC %#B (Enter GL/2 mode) command. If the operator’s application software cannot send the ESC %#B command, then use this mode.

Table 1-6. Differences between EPSON GL/2 and

GL/2 in the HP LaserJet 4 Emulation

EPSON GL/2 Mode

PCL mode Not available Initial mode Paper eject Supports PG, AF commands Supported in PCL Auto eject SelecType setting Not available Reduced printing SelecType setting Available in PCL Switch to PCL

(ESC %#A) Reset (ES C E) Ejects paper and then initializes Ejects paper, switches to PCL,

PJL, EJL, and ES Supp orted Supported Advance full page

(PG, AF)

Note:

Optional modes : EPSONSc r ip t Level 2 (PostScript Level 2 emulation) mode

Auxiliary software: Hex dump

Built-in fonts: See Table 1-7.

The EPL-5500 GL/2 mode features all the commands of the LJ4-GL/2 mode, plus a few additional commands. The GL/2 mode emulates some of the HP-GL etc.) commands. If the application software uses unsupported commands for the GL/2 mode, print cannot be assured.

FX (FX-870/ 1170, LX-100) emulation mod e ESC/P 2 (Stylus 800/1000) emulation mode WPS (Windows Printing System) mode

Status sheet Font sample

Not supported Supported

Supported Not supported

GL/2 for HP LaserJet 4

Emulati on Mode

and then initializes



plotter (HP 7475A,

Table 1-7. Built-in Fonts

Resident Fon ts

Bitmap fonts

Line Printer16.66 cpi(Po rtrait)

Scalable fonts



Dutch Dutch 801Bold SW C Dutch 801Italic SW C Dutch 801Bold Italic SWC Swiss Swiss 742Bold SWC Swiss 742Medium Italic SW C

S: Supported, NS: Not Supported

801Roman SWC



742SWC

Applicable Mode

HP LJ4, GL/2

S S S S S S S

Rev. B 1-7

General Description EPL-5500 Service Manual

Table 1-7. Built-in Fonts (Continued)

Applicable Mode

Resident Fon ts

Scalable fonts

Swiss 742Bold Italic SWC Swiss 721Rom an SWM Swiss 721Bold SWM Swiss 721Oblique SWM Swiss 721Bold Oblique SWM Dutch 801Roman SWM Dutch 801Bold SW M Dutch 801Italic SW M Dutch 801Bold Italic SWM Symbol SetSWA More WingBatsSWM CourierSWC CourierBold SW C CourierItalic SWC CourierBold Italic SWC

S: Supported, NS: Not Supported

HP LJ4

GL/2

S S S S S S S S S S S S S S S

1-8 Rev. B

EPL-5500 Service Manual General Description

1.3 INTERFACE SPECIFICATIONS

The EPL-5500 is eq uip ped with the following externa l inter fac es :

❏ Par allel inte rfac e ❏ Optio n al Loca lTalk/serial interface ❏ Optio n al Type B interface with Type-B EX box

1.3.1 Parallel Interface

The parallel interface has the following two modes:

❏ Com patibility mod e (s ame as par allel in te rfac e for EPS ON’ s cu rre n t page prin te r) ❏ Rev er se mo de

1.3.1.1 Parallel Interface Compatibility Mode

System: STROBE synchronization, 8-bit par allel data tran sf er Handshakin g: BUSY and Connector type: P90-25027-1 (Amphenol) recept acle Applicable plug: 57-30360 (A mph enol or equivalent) Transfer spe e d : Approximat ely 400, 000 bytes/second (ma x.) Signal timing: S ee F ig ur e 1-3. Signal descript ion : See Table 1-8.

ACKNLG signals

DATA 1-8

STROBE

0.5

BUSY

ACKN LG

0.5 µ s (minimum)

0.5 µ

(minimum)

VALID VALID

0.5

s (minimum)

s (maximum)

0 s

0.5 or 5 µ

(min.)

(minimum)

1 or 10

(typical)

Figure 1-3. Compatibility Mode Signal Timing

Rev. B 1-9

General Description EPL-5500 Service Manual

Table 1-8. Parallel Interface Pin Assignments

Pin No. Signal Name I/O Description

STROBE

STROBE is a strobe pulse used to read data from the host computer. The pulse width must be more than 0.5 µsec.

Normally it is HIGH, and data is latched at the trailing edge of this signal.

2-9

13 14 15 16

DATA 1-8

ACKNLG

BUSY

SLCT AUTO-FEED NC GND

DATA 1 to 8 are parallel data bits. Whe n the sig nal is HIGH, the data bit is 1, and when it is LOW, the data bit is 0. The most

significant bit (MSB) is DATA 8. The signal state must be maintained for 0.5 µsec. on either side of the active edge.

ACKNLG is an acknowledge pulse with an approximate width of 1 or 10 µsec. This signal goes LOW when the data reception is

OUT

completed, which indic ates tha t the printer c an ac ce pt new data. Timing with the BUSY signal is specified through SelecType.

The BUSY signal informs the host computer of the printer state.

OUT

When the signal i s HIGH, the pr i nter cann ot accept d a ta. The PE signal indicates paper empty for the standard tray

OUT

selected through SelecType or command, or for the optional paper cassette. Paper empty is indicated by HIGH.

OUT

Used in reverse mode.

Not used.

—

Not used.

—

Logic ground level.

STROBE signal

19-30

33 34 35 36

CHASSIS GND

NC GND

INIT

ERROR

GND NC +5 SLCT IN

Connected to the pr inter chassis . The print er chassis GND and

—

the signal GND ar e c onn ec ted to each other.

—

Not connected.

—

Ground level for the twiste d pair r eturn signal.

The

STROBE signal is ignored when this signal is LOW.

This level goes LOW whe n the pr inter is:

• Out of paper

OUT

• Paper jam

• In the error state

• Off line

—

Same as for pi n s 19 t o 30.

—

Not used.

—

Pulled up to +5 V throu gh 1. 0K -ohm resistance.

—

Used in reverse mode.

1-10 Rev. B

EPL-5500 Service Manual General Description

1.3.1.2 Reverse Mode

Reverse mode for the EPL-5500 supports the IEEE-P1284 nibble mode. This printer can run in reverse mode, in which the printer can inform the computer of its status with EJL and PJL commands.

System: IEEE-P1284 nibble mode Connector type: P90-25027-1 (Amphenol) recept acle Applicable plug: 57-30360 (A mph enol or equivalent) Signal descript ion : See Table 1-9.

Table 1-9. Parallel Interface Pin Assignment

Pin No. Signal Name I/O Description

STROBE

HostClk: This signal is a strobe pulse used to read extension

request values from the host computer durin g n egot iat ion.

DATA 1-8

2-9

ACKNLG BUSY

SLCT

AUTO-FEED

GND CHASSIS GND

These signals are data bits of extension request values received during negotiation. Th is printer suppo rts fo llowing v alues :

0000 0100: Requ es t Device ID (sent in nibble mode) 0000 0000: Requ es t nibble mod e

OUT

PtrClk: Printer sends clock data. PtrBusy: P rinter s ends da ta bits 3 and 7 during d ata tr ansfer to

OUT

host computer. AckDataReq: Printer sends data bits 2 and 6 during data

OUT

transfer to host computer. Xflag: Printer sends data bits 2 and 6 during data transfer to

OUT

host computer. HostBusy: This signal informs the printer of the host computer’s

state. When the signal is HIGH, the host computer cannot accept data.

—

Not used.

—

Logic ground level. Connected to the pr inter chassis . The print er chassis GND and

—

the signal GND ar e c onn ec ted to each other.

19-30

33 34 35

NC GND INIT ERROR

GND NC +5 SLCT IN

—

Not connected.

—

Ground level for the twiste d pair r eturn signal.

nInit: Fixed at HIGH level. nDataAvail: Printer sending data bits 0 and 4 during data

OUT

transfer to host computer.

—

Same as for pi n s 19 t o 30.

—

Not used.

—

Pulled up to +5 V throu gh 1. 0K -ohm resistance. 1284Active: If this signal is set to HIGH, this printer is actively

in P1284 (rev er se mode).

Rev. B 1-11

General Description EPL-5500 Service Manual

Compatibility Mode

Forward

Data

Transfer

ERR=HIGH

No da ta se nt

Host Busy Data Not Available

AUTO FEED=LOW

STROBE

ACK and BUSY

SLCT IN=HIGH

ERR=HIGH

No da ta se nt

Forward Idle

Negotiation

Reverse Data Transfer

Failed Negotiat ion

Sending data

ERR=LOW

Sending data

AUTO FEED=LOW

Request to send data

Terminate

SLCT IN=LOW

ERR=L OW

Host Busy Data Available

AUTO FEED=HIGH

Reverse Idle

ERR=LOW

Figure 1-4. Parallel Interface State Switch Diagram

Figure 1-4 shows the switch diagram for the parallel in te rf ac e st ate.

Interrupt Host

1-12 Rev. B

DATA SEL-IN STROBE

AUTO-FEED ACKNLG

Peripheral Busy StatusBUSY

SLCT ERROR

HB DA Negotiation

HB DA or HB DNA (Note 3)

Idle or Transfer

Bit 3 Bit 7 Bit 2 Bit 6

Bit 1 Bit 5 Bit 0 Bit 4

Peripheral Busy Status

Note 1

Note 2

EPL-5500 Service Manual General Description

Figure 1-5 shows the negotiation timi ng char t .

DATA 00h or 04h SEL-IN STROBE

AUTO-FEED ACKNLG

Peripheral Busy StatusBUSY

Current Peripheral StatusPE Note1

Note 2SLCT

Current Peripheral StatusERROR Note1

Compatibility Negotiation HB DA or

Figure 1-5. Negotiation Timing Chart

Notes:

1. This signal is set to HIGH when no data is being sent . This signal is set to LOW during sending of data.

2. This signal is set to HIGH if the extension request value was 04h.

3. HB DA: Host Busy Data is Available HB DNA: Host Busy Data is Not Available

Figure 1-6 shows the data transfer timing chart.

Notes:

HB DNA (Note 3)

Idle or Transfer

1. This signal is set to HIGH when no data is being sent . This signal is set to LOW during sending of data.

2. This signal is set to HIGH, if extension request value was 04h.

3. HB DA: Host Busy Data is Available HB DNA: Host Busy Data is Not Available

Rev. B 1-13

Figure 1-6. Timing Chart for Data Transfer

General Description EPL-5500 Service Manual

Figure 1-7 shows the t i ming chart for termination.

DATA SEL-IN STROBE

AUTO-FEED ACKNLG

SLCT ERROR

Note 3

Peripheral Busy StatusBUSY

Note 1

Note 2

HB DNA, Idle, or HB DA

Termination Compatibility

Figure 1-7. Termina tion Timing Chart

Notes:

1. The signal is HIGH when HB DNA. The signal is LOW when HB DA.

2. The signal is set to HIGH, if the extension reques t value was 04h .

3. Idle = LOW.

Figure 1-8 shows the t i ming cha rt for in terr u pts .

Peripheral Busy Status

Current Peripheral Status

Current Peripheral StatusNote 1

DATA SEL-IN STROBE

AUTO-FEED ACKNLG

SLCT ERROR

Note:

Peripheral Busy StatusBUSY

Note 1

Reverse Idle Interrupt

Figure 1-8. Timing Chart for Interrupts

The signal is set to HIGH, if the extension re que st value was 04 h.

HB DA Transfer

1-14 Rev. B

EPL-5500 Service Manual General Description

1.3.2 Serial Interfac e

This printer can use the optional LocalTalk/serial interface module. Type: RS-232C/current loop Transfer system: Full duplex Synchronization: Asynchronous start-stop system

Start-bit: 1 bit Stop-bit: 1 or 2 bits Data length: 7 bits or 8 bits Parity: Odd, even, or none

Protocol: X-ON/X-OFF (can be c ombined wit h D TR con t ro l)

DTR control (can be c ombin ed with X-ON/X-OFF) Transfer speed: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, or 57600 bps Error: Overrun error: Processed as missing data and replaced by “*”

Pari ty error: Repla ced by “*”

Framing error: Replaced by “*”

Breaking c h ar ac te r: Ignored Signal descript ion : See Table 1-10.

Table 1-10. Serial Interface Pin Assignments

Pin No. Signal Name I/O Description

CHASSIS-GND

Connected to the pr inter chassis . The print er chassis GND and

—

signal GND are connected to each other.

TXD

RXD

CTS

SIGNAL-GND TTY-TXD

DTR

Serial ASCII data output by the printer. It maintains the “MARK” state (LOW level) between transmitted character

OUT

codes. Logic 0 is at HIGH level (SPACE) and logic 1 is at LOW level (MARK).

Serial ASCII data input to the printer. It maintains “MARK”

state (LOW leve l) betw een r ec eiv ed character codes.

Always ignored.

—

Ground. Current loop signal: HIGH impedance (SPACE) between pins

17 and 24 or X-ON signal sent across pins 17 and 24 indicates

OUT

that the printer is ready to accept data; LOW impedance (MARK) or X-OFF signal being sent indicates that the printer is busy.

Signal output by printer. When the DTR signal is HIGH, the printer can receive the RXD signal. The SelecType settings do not specify DTR control, the signal level is HIGH while printer

OUT

power is on. When the SelecType setting is used for DTR control, DTR goes LOW in case of any error conditions. The data (RXD) from host computer must be stopped within 128 characte r s after DTR goes LOW.

TTY-RXD Retu rn

TTY-TXD Retur n

TTY-RXD

Note :

Rev. B 1-15

The DTR state can be selected through printer settings.

—

Current loop signal: Current return for pin 17

—

Current loop sign a l : Inp u t data current loop

Current loop signal: Current return for pin 25

General Description EPL-5500 Service Manual

Handshaking

When the vacant area for data in the input buffer drops to 256 bytes, the printer outputs an X-OFF code or sets the DTR signal level to LOW, indicating that the printer cannot receive more data. Once the vacant area for data in the buffer recovers to 512 bytes, the printer outputs an X-ON code or sets the DTR flag to HIGH, indicating that the printer is again ready to receive data.

Protocol

There are two types of protocols, as listed below, and each of them can be designated by SelecType independentl y.

❏

DTR/DSR protocol

SelecType is used to execute the DTR/DSR control protocol. The DTR signal is set to HIGH when the printer is ready to receive data, and to LOW when conditions indicate an error or that the receiving buffer is full.

When the error is cleare d a nd the print e r ret urns to on-line mode, the signal returns to HIG H. When SelecType is used to set the DTR control OFF, DTR is always set to HIGH. The printer transmits TXD only when DSR is at the HIGH level (DSR is always considered HIGH when the SelecType setting for DSR is OFF). X-ON/X-OFF tran sm issi on is indepen d en t of the DSR state.

❏ X-ON/X-OFF (DC1/DC3) protocol SelecType is used to execute the X-ON/X-OFF protocol. The X-OFF (DC3) code is output if status

indicates an error, and the printer warns the host to stop data transmission within 256 characters. No further X-OFF codes are sent in response to additional data received from the host after the X-OFF code has been sent once. The X-ON (DC1) code is output after all conditions given in the error are cleared .

When the remaining capacity of the receive buffer reaches 512 characters, X-OFF (DC3) is output once. It is sent only once, even if there are multiple errors. The printer goes on line automatically at power on, and outputs an X-ON code. Transmission of X-ON/X-OFF codes can be defined by SelecType.

1-16 Rev. B

EPL-5500 Service Manual General Description

1.3.3 Optional LocalTalk Interface

This printer can use the optional LocalTalk/ serial int er fac e mod ule. Type: LocalTalk

Signal level: Same as RS-422 sign al level Protocol: X-ON/X-OFF (can not be co mbin ed wit h DTR c on trol)

DTR control (cann ot be combined with X-ON/X-OFF) Transfer speed: 230.4K bps Signal descript ion : See Table 1-11.

Table 1-11. LocalTalk Interface Pin Assignments

Pin No. Signal Name I/O Description

DTR

Signal output by the printer. When the DTR signal is HIGH, the

OUT

printer can receive the RXD signal.

CTS TXD-

GND RXD-

TXD+

RXD+

The printer transmit s the data through T XD while CTS is HIGH. Serial ASCII d a ta output f rom the pri n ter.

HIGH level; whe n SD+ voltag e is high er than t h e SD - voltage.

OUT

LOW level; when SD+ voltage is les s th an the SD - voltage. Logic 0 is SPACE and logic 1 is MARK. The state must be main tained be tween transmitted character codes.

—

Ground. Serial ASCII data input fr om c ompu t er .

HIGH level; when RD+ voltage is high er than RD - voltage.

LOW level; when RD+ voltage is les s th an RD - vo ltage . Logic 0 is “SPACE” and logic 1 is “MARK” state must be main tained be tween transmitted character codes.

OUT

Refer to TXD-.

—

No connect.

Refer to RXD-.

Rev. B 1-17

General Description EPL-5500 Service Manual

1.4 OPERATING INSTRUCTIONS

This section describes functions performed through the control panel, such as printing a status sheet, hexadecimal dump, and printer settings functions.

1.4.1 Control Pane l

The printer control panel gives you easy control over most common printer operations. The panel consists of indicator lights and a button.

LED (Yellow)

LED (Red)

Button

Figure 1-9. Control Panel

Indicator lights

❏

Yellow light

ON: Communication with the host is possible. Fast flashing: Receiving data or warming up. Slow flashing: Received data is stored in the printer but has not been printed. OFF: Printer is power off.

❏

Red light

ON: Paper jam or cov er open . Fast flashing: Feed jam, paper empty. Slow flashing: One of these errors: SOFT ERROR, PRINT OVERRUN, MEMORY OVERFLOW,

CHECK PAPE R SIZE , IMA GE OP TIMUM

OFF: No error condition.

1-18 Rev. B

EPL-5500 Service Manual General Description

Functions of Pressing the Button

❏

While the Red light flashe s slowly:

Function of button Clears an error. Operation Hold down the button until the yellow and Red lights both go on

after release. The prin ter prin ts a status sheet in dicatin g the er r or type.

❏

While the Red light flashes fast:

Function of button Prints any of the following page.

- Feed jam or paper empty page

- Manual feed page

Operation Load the pape r or c lear the jam, and then hold down the button

until the yellow and Red lights go on, then release to continue printing.

❏

While yellow light is flashing slow ly (ex cep t in EPSONS cript mod e):

Function of button Prints out data in the printer’s memory. Operation Hold down the button until the yellow and red lights go on, then

release the button to continue printing.

❏

While the yellow light is on (except in W PS mod e):

Function of button Prints a status sheet. Operation Hold down the button until the yellow and red lights go on, then

release the button to continue printing. The yellow light flash while the status sheet is being printed.

❏

Reset (always effective ex ce pt du ring w ar m up or status sheet print ing ): Function of button Clears current port. Operation Hold down the button until the yellow and red lights go on, and

when these lights start flas h in g altern at ely, release the button.

❏

Warm boot (always effective except during warm up or status sheet printing): Function of button Warm boot (same as power on reset, except for engine initialization).

Operation Hold down the button until the yellow an d red ligh ts start flas h in g

at the same time, then release the button.

Rev. B 1-19

General Description EPL-5500 Service Manual

1.4.2 Printer Settings Functions

The printer settings function from the Remote Control Panel (software) lets the user control most of the printer’s functions, such as printing test pages, selecting a paper size, and changing the printer’s configuration. Table 1-12 shows the prin ter se ttin gs options.

Table 1-12. Printer Settings

Menu It em Avai lab le Options

PRINTING COPIES 1 to 999

PAGE SIZE A4, A5, B5, LT, H LT, LGL, G LT, GLG, EXE ,

F4, MON, C10, DL, C5, IB5, CTM ORIENTATION PORT, LAND MANUAL FEED OFF, ON RITech OFF, LIGHT, MEDIUM, DARK TONER SAVE OFF, ON

LJ4 FONT SRC RESIDENT, SIMM, DOWN LO AD

FONT NUMBER 0 to (available) PITCH 0.44 to 99.99 CPI (0.01 steps) HEIGHT 4.00 to 999.75 PT. (0.25 steps) SYMSET Roman-8, ECM94-1, 8859-2 ISO, 8859-2 ISO,

IBM-US, IBM-DN, PcMultiling, PcE.Europe,

PcTk437, WiAnsi, WiE.Europe, WiTurkish,

DeskTop, PsText, VeInternati, VeUS,

MsPublishin, Math-8, PsMath, VeMath,

PiFont, Legal, UK, ANSI ASCII, Swedis2,

Italian, Spanish, German, Norweg1,

French2, Windows FORM 5 to 128 lines SRC SYMSET* 0 to 3199 DEST SYMSET* 0 to 3199

PS* ERR SHEET OFF, ON

MicroGray OFF, ON PROTECT LEV EL 1 to 5

ESCP2* Font Courier, Roman, Sans serif, Roman-T,

Sans-H, Script Pitch 10 CPI, 12 CPI, 15 CPI, Prop Condensed OFF, ON T-Margin 0.40 to 1.50 Inch (0.05 steps) Text 1 to (available) lines CG Table Pc USA, Italic, PcMultilin, PcPortuguese,

PcCanFrenc, PcNordic, PcTurk2,

Pc.E.Europe, BpBRASCII, BpAbicomp Country USA, France, Germany, UK, Denmak,

Sweden, Italy, Spain1, Japan, Norway,

Denmark2, Spain2, LatinAmeric, Korea,

Legal

* With option

Table 1-12. Printer Settings (Co ntinued)

Menu It em Avai lab le Options

1-20 Rev. B

EPL-5500 Service Manual General Description

ESCP2 * (Con tinued) Auto CR ON, OFF

Auto LF OFF, ON Bit Image Dark, Light, BarCode Zero Char

FX* Font Courier, Prestige, Roman, Sans serif, Script

Pitch 10 CPI, 12 CPI, 15 CPI, Prop Condensed OFF, ON T-Margin 0.40 to 1.50 Inch (0.05 steps) Text 1 to (available) lines CG Table Pc USA, Italic, PcMultilin, PcPortuguese,

Country USA, France, Germany, UK, Denmak,

Auto CR ON, OFF Auto LF OFF, ON Bit Image Dark, Light, BarCode Zero Char

I239X* Font Courier, Prestige, Gothic, Orator Script,

PcCanFrenc, PcNordic, PcTurk2, Pc.E.Europe, BpBRASCII, BpAbicomp

Sweden, Italy, Spain1, Japan, Norway, Denmark2, Spain2, LatinAmerica

Presentor

* With option

Pitch 10 CPI, 12 CPI, 15 CPI, 17 CPI, 20 CPI, 24

CPI, Pro p Code Page 437, 850, 860, 863, 865 T-Margin 0.40 to 1.50 Inch (0.05 steps) Text 1 to (available) lines Auto CR OFF, ON Auto LF OFF, ON Alt.Graphics OFF, ON Bit Image Dark, Light, BarCode Zero Char

Rev. B 1-21

General Description EPL-5500 Service Manual

Table 1-12. Printer Settings (Co ntinued)

Menu It em Avai lab le Options

JOB PAG E PROTECT AUTO, ON

RESOLUTION 600, 300 IMAGE OPTIMUM AUTO, OFF, ON TIMEOUT 5 to 300

EMULATIO N PARALLEL LJ4, ESCP2*, FX*, I 239X*, PS*, GL2, AUTO*

SERIAL* LJ4, ESCP2*, FX* , I239X*, P S*, GL 2, AUTO* L/T* LJ4, ESCP2*, FX*, I239X*, P S*, GL 2, AUTO* AUX* LJ4, ESCP2*, FX* , I239X*, P S*, GL 2, AU TO *

CONFIG AUTO CON T OFF, ON

STANDBY ENABLE, DISABLE DENSITY 3, 4, 5, 1, 2 INTERFACE AUTO, PARALLEL, SERIAL*, L/T*, AUX* TOP OFFSET 0 to 99 LEFT OFFSET 0 to 99 PAGE COUNT 0 to 262143

PARALLEL SPEED FAST, LOW

BI-D ON, OFF

SERIAL WORD LENGTH 8, 7

BAUD RATE 9600, 19200, 38400, 57600, 300, 600, 1200,

2400, 4800 PARITY NONE, EVEN, ODD STOP BIT 1, 2 DTR ON, OFF XON/XOFF ON, OFF

TEST STATU S SHEET —

PS STATUS SHEET* — PS FONT SAMPLE* — PS FACT SHEET* — EXT PRINTER INFO —

* With option

1-22 Rev. B

EPL-5500 Service Manual General Description

1.4.3 Service Mode

This printer has the following four serv ice mod es:

❏

Hexadecimal dump mode

❏

EEPROM format mode

❏

Factory reset mode

❏

Default setting mode

Each service mode can be activatted selectively, by turning the printer on while hold down the button and release it at the correspond ing tim in g shown in table below .

Table 1-13. Serv ice Mo de Se lect Tim ing

Order Pattern

*1: Can be performed by the user.

Pattern 0-0

Pattern 0-1

Pattern 1

Pattern 2

Pattern 3

Pattern 4

LED

(Yellow)

ON ON

OFF OFF

ON OFF

OFF ON

ON OFF

OFF OFF

LED

(Red)

Mode

Hexadecimal dump mode

EEPROM Initialize mode

Factory reset mode

Default setting mode *1

1.4.3.1 Hexadecimal Dump Mode

Hexadecimal dump mode is a useful tool in troubleshooting data control problems. To enter hexadecimal dump mode, release the button at the mode select timing "Pattern-1". To quit the hexadecimal dump mode, turn off the printer or perform the warm-boot operation.

1.4.3.2 EEPROM Initialize Mode

EEPROM initialize operations are required only when the main board or EEPROM is replaced and these operations are spec ified in the accompanying documen ta tion.

This mode resets all user settings to the factory default settings and clears the printer status information (page counter and jam counter). To perform EEPROM initialize mode, release the button at the mode select timing "Pattern-2" and press the bottun again within 2 seconds from the release. The LED lights flashes alternately during the initialization. If the button is not pressed within 2 seconds afte r release, the printer enters nomal state wit h out init ialize operation.

1.4.3.3 Factory Reset Mode

The factory reset mode resets the printer settin gs to the factory def ault settings (the page counter and jam co unte r are no t cl eare d). T o ent er fa ctory re set mode, releas e the but ton a t the mode s elec t timing "Pattern-3" and press the button again within 2 seconds after release. The LED lights flashes alternat ely during the rese t operation. If the button is no t p re ssed within 2 seco nds after releas e , the printer enters the nomal state without r eset operatio n .

Rev. B 1-23

General Description EPL-5500 Service Manual

1.4.3.4 Default Settings

The default settings function is used to enter printer settings. The procedure for entering default settings is:

1. To enter the default settings mo de, turn on the printer whil e holdi ng down the button until yellow and red lights turn off and on and off .

2. Press the button the number of times for the 1st code, while the yellow light is flas h ing .

3. Press the button the number of times for the 2nd code, while the red light is flashing.

4. Press the button the number of times for the 3rd code, while all lights flash.

5. If you need end the default settings mode, return step 2 and input the "111" code. If you n e ed set th e other sett i ngs, return to ste p 2.

Thable 1-14 shows default settings co de s.

Table 1-14. Default Settings Codes

Default Settings

Menu Item Available Options

Code

End of default settings mode

Codes

1st

2nd

Code

111

3rd

Code

PARALLEL SPEED FAST

SLOW

Bi-D ON

OFF

SERIAL* WORD LENGT H 8

BAUD RAT E 960 0

19200 38400 27600 300 600 1200 2400 4800

PARITY NONE

EVEN

112 113 114 115 121 122 123 124 125 131 132 133 134 135 141 142 143

ODD

STOP BIT 1

DTR ON

OFF

XON/XOFF ON

OFF

* With option Table 1-14. Defau lt Set tings Code (Continued )

Menu Item Available Options

1-24 Rev. B

144 145 151 152 153 154 155

Default Settings

Codes

1st

Code

2nd

Code

3rd

Code

EPL-5500 Service Manual General Description

EMULATION PARALLEL LJ4

ESCP2* FX* I239X* PS* GL2

AUTO* SERIAL* LJ4 LT* AUX* SERIAL* ESC/P2* LT* AUX* SERIAL* FX* LT* AUX* SERIAL* I239X*

211 212 213 214 215 221 222 232

233

234

235

* With option

LT* AUX* SERIAL* PS* LT* AUX* SERIAL* GL/2 LT* AUX* SERIAL* AUTO* LT* AUX*

241

242

243

Rev. B 1-25

General Description EPL-5500 Service Manual

Table 1-14. Default Settings Code (Continued)

Deafult Settings

Menu Item Available Options

Code

ESC/P2* / FX* C G Table PcUSA

Codes

1st

2nd

Code

253

3rd

Code

Italic PcMultilin PcPortugue PcCanFrenc PcNordic PcTurkish PcE.Europe BpBRASCII BpAbicomp

STATUS SHEET LANGUAGE ENGLI S H

FRENCH GERMAN ITALIAN SPANISH

PRINTING PAGE SIZE A4

LT LGL

254 255 311 312 313 314 315 321 322 323 324 325 331 332 351 352 353

CTM

ORIENTATION PORT

LAND

MANUAL FEED OFF

TONER SAVE R OFF

JOB RESOLUT I ON 600

300

CONFIG AUTO CONT OFF

STANDBY ENABLE

DISABLE

INTERFACE AUTO

PARALLEL SERIAL LT

354 355 411 412 413 414 415 421 422 423 424 425 431 432 433 434 435

AUX

* With option

1-26 Rev. B

441

EPL-5500 Service Manual General Description

1.4.4 Display of Messag es

This pr inte r ind ica tes t hree type s of messa ges w ith t he LED lig hts o r s tatus she et: stat us m ess ages , error messages, and the service call error message.

1.4.4.1 Status Messages

The LED lights normally indicate the printer’s status. (Refer to Section 1.4.1.)

1.4.4.2 Error Messages

If any of the following errors occurs, it will be printed on the status sheet (Refer to Section 1.4.2.). Clear the error immediately using the measures shown in the following table.

Table 1-15. Error Messages

Message Status Measures

SOFT ERROR Print er detected a CPU error or soft

error. (Refer to Chapter 5.)

PAPER JAM A paper jam has occurred. Open the cover and remove the

PRINTER OPEN Cove r i s open. Close the c o ver. MANUAL FEED Select manual feed and begin

printing data.

PAPER SET No paper is left in either the

standard tray or the optional cassette.

PRINT OVERRUN Engine speed faster than print image

processing.

MEM OVERFLOW Data has filled the buffer. Confirm and press the button. And

CHECK PAPER SIZE The paper si ze in the tray is di fferen t

from the paper size chosen.

IMAGE OPTIMUM The printer uses a lower print

quality.

—

jammed paper. Then clo se th e cover.

Insert paper and press button.

Load paper in paper tray or optional cassette and press button.

Press the button.

add optional SIMM. Change the paper and print again.

Erase downloaded data or add a SIMM.

1.4.4.3 Service Call Error Message

The LED lights flash r an d omly, wh en the printer detects a s er vice c all er ro r. (Refer to Chapter 5.).

Rev. B 1-27

General Description EPL-5500 Service Manual

1.4.5 Printer Sharing

This section describes printer sharing. This printer has two methods of printer sharing, port fixed mode and auto sense mode . These modes a re selected by “INTE RFACE” in the printer sett ings menu.

1.4.5.1 Port Fixed Mode

When the printer is in port fixed mode, only one interface port is active. Data from other ports is ignored.

1.4.5.2 Auto Sense Mode

HP mode ESC/P2 mode FX mode GL2 mode

EPSONScript mode

HP mode

ESC/P2 mode FX mode GL2 mode

EPSONScript mode

Switc hed by print er sett ings

Input buffer

Memory

User 1

User 2

Mode Assignment

Parallel

Mode Assignment

L/T or Seri al or AUX

Figure 1-10. Port Fixed Mode

It is possible to allocate each mode to parallel, serial, L/T, and AUX. The entire memory will be allocated to the channels that are us ed . Th e interface that receives the data first will print first.

HP mode ESC/P2 mode FX mode GL2 mode

EPSONScript mode

Input buffer

Auto Sense

User 1

Mode Assignment

Parallel

User 2

Mode Assignment

Serial or L/T or AUX

Figure 1-11. Auto Sense Mode

HP mode

ESC/P2 mode FX mode GL2 mode

EPSONScript mode

Memory

Input buffer

1-28 Rev. B

EPL-5500 Service Manual General Description

1.4.6 Emulation Mode Switch Function

This section describes the emulat ion mode switch function.

1.4.6.1 Emulation Switch by SPL

The two types of emulation switch function described below are available on this printer. Together they are referred to as SPL (Shared Printer Language).

EJL: EPSON Job Language

This is EPSON’s original language system. It is used to skip among various destinations, as shown in Figure 1-12.

PJL: Printer Job Language

This is HP’s original language, which is available with LaserJet 4 printer. It is used to skip among various destinations, as shown in Figure 1-12. The precise specifications for this language are based on HP LaserJet 4.

The figure below shows three types of mode switchin g. Neither EJL no r PJL swit ches the mode directly. They first exit the current mode and return to EJL

or PJL. Then they en t er an ot h er mode.

1.4.6.2 Intelligent Emulation Switch

LJ4

EJL

EPSONScript

PJL

ESC/P 2

EPSON GL/2

Figure 1-12. Emulation Switch by SPL

Intelligent Emulation Switch (IES) automatically switches emulation mode, depending on the data sent from the host computer through one of the interface channels. It is able to switch between EPSONScript and other modes as shown in the figure below.

1.4.7 Bi Resolution Improvement Technology

LJ4

ESC/P 2

EPSONScript

FX EPSON GL/2

Figure 1-13. Intelligent Emulation Switch

The EPL-5500 printer has BiRITech (Bi Resolution Improvement Technology), which is designed to improve print quality at 600 dpi and 300 dpi. By this method, the dot map data extracted from the image data is reassembled to improve prin t data .

Rev. B 1-29

General Description EPL-5500 Service Manual

The main improvement of this technique is in eliminating “jaggies” in diagonal lines. It is most effective when the dot m ap data fi ts the development characteristic s o f the printer mechanism well . It is therefore necessar y to set appropriat e value s in printer settings .

Note:

BiRITech is not as effective for printing a mesh pattern or gray scale. In such cases, BiRITech must be set to OFF. (The default setting is MEDIUM.) Since the BiRITech effect depends on the toner condition, ad jus ted it w hen the ima g ing cart ridge is repla ce d or after the imaging cartridge is used for a long time .

1 inch

1 2 600

1 2 3

4 5 6

7 8

600

(When 600 DPI printi ng)

Figure 1-14. Effect of BiRITech

The following settings are available in printer settings for RITech: DARK, MEDIUM, LIGHT, OFF. The status sheet has the following RITech test image. When the toner density of area A is almost the same as that of area B (as shown in the figure below), the RITech setting is at its optimum setting. In other words, the optimum setting is achieved when it is difficult to distinguish the shape of area A from that of B.

Figure 1-15. RITech Adjustment

1-30 Rev. B

EPL-5500 Service Manual General Description

1.4.8 Toner Save Mode

The Ton e r Save Mode uses about 50% l e ss toner than normal . Th e printer saves tone r b y substiut i ng a gray shade for the black inside of characters. the outlines of the characters are still printed in full back.

1.4.9 Optional Memory

Upper Edge

Left Edge

Figure 1-16. Toner save Mode

If you have difficulty printing complex, graphics-intensive pages or if you regularly use downloaded fonts, you may need to install one of the option al SIM M sets on this printer ’s contr oller board. The printer’s controlle r board comes wit h 1MB of RAM inst alled .

By installing additional SIMMs, you can increase the printer’s memory to a total of 32MB, including the residen t me mor y .

EPSON s upplies se veral types of memor y option (SI MMs). Other S IMMs can be p urchased fr om other vendors. Be sure the SIMM meets the requirements listed below.

❏

72-pin type

❏

Capac ity is one of the following: 1, 2, 4, 8, 16 , 32MB

❏

Ac ce ss speed is less than 70 ns.

❏

Within the following dimensional size

36 mm (height) × 108 mm (wid th) × 10 mm (depth)

Rev. B 1-31

General Description EPL-5500 Service Manual

1.5 MAIN COMPONENTS

To simplify maintenance and repair, the main components of the EPL-5500 have been designed for easy removal and repla ce men t . Th e main c omponents are:

❏ C169 MAIN- B B oard Main board ❏ PWB-E Board Power supply cir c u it boar d ❏ P WB -F B oar d High-voltage supp ly c ir cuit boar d ❏ Optical Un it Printhead unit ❏ Fusing Unit ❏ Photoconductor u n i t ❏ Developer cartridge ❏ Housing

C169 M AIN-B Board

Fusing Unit

PWB-E Board

Optical Unit

PWB-F Board

Figure 1-17. Component Layout

1-32 Rev. B

MB86933H (IC1)

E05A91 (IC2)

(IC12)

(IC16)

(IC15)

(IC14)

(IC13)

M3807 (IC201)

E05A93 (IC4)

E05A92 (IC3)

EPL-5500 Service Manual General Description

1.5.1 C169 MAIN-B Boar d

The C169 MAIN-B board is a video c on troller and engine controller board . Th e prim ar y fun ction s of this board are receiving print data from the host, generating the print image (video), and sending the print image to the engine controller via the video interface. A 32-bit 22 MHz RISC MB86933H SPARKlite CPU in location IC1 is used, and the following memory chips and custom ICs are assigned to the 4GB memory space.

❏

Memory chips

Code and font ROM s: fou r 4M -bit E P ROM s (IC13, 14, 15, 16) or two 8M- bit mas k ROM s (IC 21, 22) Optional NLSP font ROM : 4M- bit or 8M -bit RO M (IC 12). Not available in U.S. version. 4M-bit DRAMs (IC 17, 18) EEPROM (IC11)

❏

Custom ICs

ASIC E05A91 (IC 2) ASIC E05A92 (IC 3) ASIC E05A93 (IC 4)

❏

Others

Reset IC M51953BFP (IC6)

The engine controller consists of an M3807x 8-bit CPU, including a MASK ROM. It controls laser scanning (the polygon mirro r drive motor), image sync hronization, laser beam pulse wi dth, and power.

There are two types of C169 MAIN-B boards used as after service parts. The following table shows differences betw een t hem.

Table 1-16. Diff er en ces in Com pone nt s for the C169 MAIN - B Boar d

US version Other Version

IC12 None IC socket Jumper J20 Open Sho rt

Figure 1-18. C169 MAIN- B Boar d

Rev. B 1-33

CAUTION

VR3

General Description EPL-5500 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.

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

VR1

Figure 1-19. PWB-E Board

1.5.3 PWB-F Board

The PWB-F is the high-vol tage supply circuit b oard. It conv erts the develo pment bia s, OPC drum charge bias, and image tra n sfe r bias.

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

Figure 1-20. PWB-F Board

1-34 Rev. B

EPL-5500 Service Manual General Description

1.5.4 Optical Unit

The optica l u ni t consists of the l as e r diode (semi-conductor laser), the m i rro r m otor (scanner moto r) which drives the pol ygon mirro r for l aser sca nning, an d sever al mirro rs and lenses. The lase r 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 elec tro- photo graph ic ima ge on the d r um.

Figure 1-21. 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 differenc e bet ween them is the heater lamp.

Figure 1-22. Fusing Unit

Rev. B 1-35

General Description EPL-5500 Service Manual

1.5.6 Phot oc on du cto r Uni t

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

Figure 1-23. Photoconductor Unit

1.5.7 Developing Cartridge

Core mechanisms of the printing proce ss , such as de velopin g, are int egr ate d into this cartridg e.

1.5.8 Lower Paper Casste Unit

This optional paper cassete allows you to feed up an addtional 250 sheets of A4 or B5 paper into this printer.

Note:

Figure 1-24. Developing Cartridge

While you use A4/B5 paper, jumper JP1 on the circuit board of lower paper casstte unit should be set to 2-3. While you use letter/ executive paper, jumper JP1 should be set to 1-2. Jumper JP2 is fixed to 1-2.

1-36 Rev. B

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 VIDEO CONTROLLER OPERATION 2-16

2.2.1 C169 MAIN-B Board Operat i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

2.2.1.1 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.2.1.2 Bus Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.2.1.3 Interrupt Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

2.2.1.4 DRAM Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

2.2.1.5 Parallel Interface Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

2.2.1.6 Video Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

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. Paper Feeding from the Lower Paper Cassette . . . . . . . . . . . . . . . . 2-4

Figure 2-5. Drum Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-6. Laser Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-7. Development. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-8. Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-9. Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-10. Engine Controller Connecting Diagram . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-11. Gear and Roller Positions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-12. Main Motor Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-13. Paper Take-Up Sensor and Paper Exit Sensor On/Off Timing . . . 2-9

Figure 2-14. Fuser Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-15. Temperature for Fuser Control Procedure . . . . . . . . . . . . . . . . . . 2-10

Figure 2-16. Scanner Motor Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-17. Laser Diode Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-18. LDATA Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-19. Laser Emission Power Adjustment Timing. . . . . . . . . . . . . . . . . . 2-12

Figure 2-20. High-Voltage Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-21. Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

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

Figure 2-23. Print Sequence (End). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-24. Power Supply Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-25. Video Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 2-26. C169 MAIN-B Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 2-27. Data Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Figure 2-28. Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Figure 2-29. Bus Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Figure 2-30. DRAM Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Figure 2-31. Parallel Interface Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

List of Tables

Table 2-1. Functions of C169 MAIN-B Board Main Elements . . . . . . . . . . . . . 2-17

Optional Second Paper Feeding Unit

4 5

1516

EPL-5500 Service Manual Operating Principles

2.1 ENGINE OPERATION

This section describes the functions and operating principles of the EPL-5500 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 Empty Sensor (PI1)

4. Upper Fusing Roller 14. Paper Take-up Roller

5. Heater Lamp (H1) 15. Paper Transport Roller

6. Paper Exit Roller 16. Paper Take-up Sensor (PC1)

7. Print Tray 17. Pre-image Transfer Roller

8. Optical Unit 18. Elec trode Comb

9. Toner Cartridge 19. Drum Cartridge

10. Manual Feed Guide

Rev. B 2-1

Operating Principles EPL-5500 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.

Fusing

Image Transfer

Print Exit

Drum Cartridge

Drum Charge

Toner Cartridge

Optical Unit

Exposure

Toner Hopper

Development

Paper Feeding Tray

Second Paper Feeding Unit (optional)

Multi Feeding (150 sheets)

Figure 2-2. Print Process Diagram

Manual Feed (1 sheet)

Multi Feeding (250 sheets)

2-2 Rev. B

EPL-5500 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 t he manual feed slot (1 sheet at a time). Installing an optional second paper feed unit (lower cassette, 250 sheets) adds another feeding method. Paper fed by t he paper take-up roller is transported to the transport roller, pre-image transfer roller , and t hen exit r oller. A fter t his, 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 Tra y )

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 t op (f irst) 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.

Upper Fusing 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 Roller

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

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

Rev. B 2-3

Operating Principles EPL-5500 Service Manual

Second Paper Feed Unit (Optional Lower Cassette)

This unit contains no drive motor, so the main motor (M1) drive is trans mitted to the paper take-up and transport sections in the unit via the drive transm ission gear. Although the feeding method is the same as for the paper feed tray in the printer, this unit uses a corner separation system as its paper separating function. The paper take-up solenoid in the lower cassette is controlled by the printer via a circuit board in the optional unit.

When the paper regulation plate is set to the inside position, switch S1 on the circuit board is automatically turned on, causing the printer to rec ogniz e that B5-si ze paper will be fed. On the other hand, when the paper regulation plate is set to t he outside position, S1 remains off, causing the printer to recognize that A4-size paper will be fed.

Paper Empty Sensor (P|1)

PWB-A

Paper Regulation Plate

Paper Take-Up Roller

Paper Take-Up Clutch

Drive Transmission Gear

Paper Lift-Up Plate

Transport Roller

Corner Separation Plate

Paper Take-Up Solenoid

Figure 2-4. Paper Feeding from the Lower Paper Cassette

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 i s 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 dirctly applied to the PC drum. The rotating charge brush is rotated by the drive of the M1 main motor via its gear.

C169 MAIN-B

IC201

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)

PWB-F

PC Drum

B Pre-film

A: Drum Charging Bias B: Drum Ground

Figure 2-5. Drum Charge

2-4 Rev. B

EPL-5500 Service Manual Operating Principles

2.1.1.3 Laser Exposure

The laser beam, emitted from the optical unit, makes an invis ible static image. The SOS (start of scan) sensor, installed on t he laser diode control boar d (PWB-D), unif ies the l aser emission timing for each scan line.

Charged Surface

Reflector Mirror

CN210

C169 MAIN-B

IC201

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

PWB-D

SOS Sensor

Laser Diode

CN205

Figure 2-6. Laser Exposure

2.1.1.4 Development

Toner is applied to the invisible stat ic 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 specif ied positive voltage is applied to the sleeve roller to prevent toner from being attrac ted back onto the PC drum (reverse bias control).

VB (Developing Bias)

VBL (Toner Blade Bias)

PWB-F

VB terminalVBL terminal

Vs terminal

CN204

C169 MAIN-B

IC201

CN1F

Vs (Lower Seal Bias)

Figure 2-7. Development

1. Toner hopper: Contains toner.

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

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.

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 the developed image to the paper surface.

Rev. B 2-5

Operating Principles EPL-5500 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

CN204

C169 MAIN-B

IC201

Electrode Comb

Housing

Pre-Image Transfer Roller

Housing Ground

Image Transfer Bias

PWB-F

CN1F

PWB-S

818

Figure 2-8. 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. Thermis tor TH1 detects and controls the temperature of the upper fusing roller. Thermal fuse TF1 blows when the temperature exceeds 200° C, shutting down power to the heater lamp.

Thermal Fuse

Thermistor

Lower Fusing Roller

Upper Fusing Roller

Paper

Figure 2-9. Fusing

Heater Lamp

2-6 Rev. B

EPL-5500 Service Manual Operating Principles

2.1.2 Engine Con tr ol

This section describes engi ne control, t he power supply board, and the high-voltage s upply board. The engine is controlled by the main board (C169 MAIN-B Board). Figure 2-10 shows the engine controller connecting diagram.

C169 MAIN-B Board

Main Motor (M1)

Polygon Motor (M2)

Fan Motor (M2)

Exit Sensor (PC3)

Paper Take-up Sensor (PC1)

PWB-E Power Unit

PWB-D Laser Diode Drive

Heater Lamp

Interlock Switch

Paper Take-up Solenoid (SL1)

Fusing Roller Thermistor (TH1)

Image Transfer Housing

Image Transfer Charger

PWB-F High Voltage Unit

Paper Take-up Solenoid (SL2)

2nd Paper Feeding Unit (Option)

PWB-S

PWB-A

Figure 2-10. Engine Controller Connecting Diagram

Rev. B 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-5500 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.

Fig.2-11. Gear and Roller Positions

2-8 Rev. B

CN206

Ma in Moto r M 1

Main

Board

C16 9 MAIN-B

2.0 11.0

Take Up Solenoid ON

3.5-4.5

3.4-4.7

[seconds]

PC1 (CN203-3)

PC3 (CN208-3)

EPL-5500 Service Manual Operating Principles

Figure 2-12 shows the m ain motor drive circuit. The M1 main motor is a four-phase s tepping motor controlled by the CPU (IC201) on the main board (C169 MAIN-B). This board has a stepping motor driver IC that drives the M1 main motor with a constant current.

Figure 2-12. 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 s ensor does not tur n on for paper feeding, the printer det ects a f eed jam or no paper. A feed jam is a paper jam that occurs in the feed process.

If any of the following c onditions is detected, the printer det ects a paper jam . A paper jam is a j am that occurs in the printing process area.

• The paper take-up sensor (PC1) or the paper ex it sensor (P C3) is on at power on or when the upper case is closed.

• The paper take-up sens or (PC1) or t he paper exit sensor (PC3) is not t urned on/off within the specified time. (Refer to the following timing chart.)

Rev. B 2-9

Figure 2-13. Paper Take-Up Sensor and Paper Exit Sensor

On/Off Timing

Operating Principles EPL-5500 Service Manual

2.1.2.3 Fuser C ontrol

The heater lamp, powered by AC volt age, heats t he fus er. When t he power supply boar d receives a

FUSER signal from the main board (C169 MAIN-B), the power supply board (PWB-E) supplies the AC voltage to the heat er lamp. This AC v oltage is cut by an interlock s witch when the case is open.

Thermistor TH1 detects t he surface temperature of the upper f using roller and inputs that analog voltage to the 77-pin chip, IC201. Based on this temperature dat a, the heater lamp on/off signal ( the FUSER signal) is output from the 54-pin chip, IC201, causing heater lamp H1 to turn on or off to control the fusing temperature. When t he heater lamp is not turned off even if the thermistor detects a high temperature mal function (which occurs if the surface temperature of the upper fus ing roller exceeds 200º C), the s ignal from the 75-pin chi p, IC201, changes f rom H to L to turn off t he heater lamp forcibly.

C169 MAIN-B

IC201

IC202B

5 6

5 VDC

IC202A

2 3

Analog Voltage Detected by the Thermistor (TH1)

CN202

1 2

CN207 1

Heater Lamp ON/OFF Signal

L H

CN1E

H1:ON

H1:OFF

PWB-E

Figure 2-14. Fuser Control Circ uit

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

CN3E

1 2

TH1

Thermistor

Heater Lamp

TF1

Thermal Fuse

156

112

Power On

Warm up Standby Standby with Low

Temperature

Time

Figure 2-15. Temp eratu r e for Fuser Con tr ol Proced ur e

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.

2. Standby: In standby mode, the upper fusing roller’s temperature is controlled to maintain 156º C.

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.

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

2-10 Rev. B

EPL-5500 Service Manual Operating Principles

Rev. B 2-11

Operating Principles EPL-5500 Service Manual

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 or less.)

2. If the thermistor detects that the temperature has not reached 172º C 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 or lower for 50 msec., or the temperature during printing has fallen to 133º C or lower.

4. The thermistor detects that the temperature has exceeded 193º C for 50 msec. during temperature

control.

Note: Pause Mode: In this 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 fus ing section rises to an abnormally high level (over 200° C, 392° F).

2.1.2.4 Scanner Motor Contro l

Figure 2-16 is the scanner motor ( M2) control c ircuit. The scanner motor is dr iven while it r eceives the POLYGON CTL signal. Motor rotation speed is 8622 rpm

Main Board (C169 MAIN-B)

CN210

+24V

GND2

+5V

P_CTL

1 2 3 4 5

Scanner Motor M2

Figure 2-16. 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.

2-12 Rev. B

EPL-5500 Service Manual Operating Principles

2.1.2.5 Laser Diode Drive

Figure 2-17 shows the laser diode drive ci rcuit. Laser diode emis sion is controlled by three signals (

LDATA, LDAPC1, and LDAPC2) from the main board (C169 MAIN-B).

Laser Diode SSCAN LD_CTL

LDAPC1 LDAPC2

L DATA

LD SOS (PWB-D)

SOS Mirror

Main Board (C169 MAIN-B)

SOS Sensor

Figure 2-17. Laser Diode Drive Circuit

LDATA signal is the laser on/off signal. When i t is LOW, the laser emit s, and when it is HIGH,

The the laser stops em itting. VIDEO or the FORCED LA SER DIODE ON signal is activated (LOW), the LDATA signal will be active. The LASER DIODE ON signal is a laser emission signal to apply the laser beam to the SOS sensor.

VIDEO signal is an image signal sent from the video contr oller circuit. The FORCED

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

Forced Laser Diode ON

L DATA

VIDEO

from the Video

Controller Circuit (C169 MAIN-B)

Figure 2-18. 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 adjus t signals; they are analog signals. LDAPC1 is a tuning, and LDAPC2 is a fine tuning.

Scanner Motor On

LDATA

LDAPC1

LDAPC2

P_CTL

Figure 2-19. Laser Emission Power Adjustment Timing

If any of the following conditions are 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.

Rev. B 2-13

Operating Principles EPL-5500 Service Manual

2.1.2.6 Bias Voltages and Laser Drive Timing

Figure 2-20 is a diagram of the drum charge bias voltage, image transfer bias voltage, and the developing bias v oltage control cir cuit. These bias voltages are generat ed from t he +24 VDC f rom the high-voltage supply board (PWB-F). If the printer detec ts 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 (C169 MAIN-B). The

HV-T signal is the image transfer bias voltage control. While t his signal is LOW, the image transf er 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 cont rols 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 (C169 MAIN-B)

PWB-S

+24 VDC

HV-C

HV-T HV SEL1 HV SEL2

HV B

BIAS MON

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 Doctor Toner Blade

Bias -500 VDC Seal Bias

-250 VDC

Figure 2-20. High-Voltage Supply Block Diagram

2-14 Rev. B

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

M3 normal rotation

4000

[m sec.]

Polygon Motor (M3)

Main Motor (M1)

Drum Charge

Laser Exposure

Development

Image Transfer

Paper Exit Sensor (PC3)

5160

850

480

EPL-5500 Service Manual Operating Principles

Figure 2-21 shows the print process.

Figure 2-21. Print Process

Figure 2-22 shows the start print sequence. The printer ’s engine s tarts pr inting when it receives the PRINT signal from the video controller circuit.

Figure 2-22. Print Sequence (Start)

Figure 2-23 is the end of the print sequence.

Figure 2-23. Print Sequence (End)

Rev. B 2-15

AC IN

Interlock SW

+24 VDC

+5 VDC

Power Supply Board (PWB-E)

Operating Principles EPL-5500 Service Manual

2.1.2.7 Fan Mot or 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 m otor stops after 3 min. If the following condition is detected, the printer indicates a Fan motor 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 v oltage supply, main motor (M 1) 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 2-24. Power Supply Circuit Block Diagram

2-16 Rev. B

EPL-5500 Service Manual Operating Principles

2.2 VIDEO CONTROLLER OPERATION

The video controller section generates the video signal s for received data. The video controller section is the C169 MAIN-B Board.

C169 MAIN-B Board

Video Controller Section

Engine Controller Section

Figure 2-25. Video Controller Section

2.2.1 C169 MAIN-B Board Operation

Figure 2-26 shows a block diagram of video controller section of the C169 MAIN-B Board. The C169 MAIN-B Board contains the video controller, which consists of a MB86933H (SPARKlite, 22.5 MHz, 32-bit bus) RISC CPU; the standard cells dev eloped for this printer; DRAMs; ROM; and an EEPROM.

CPU MB86933H (IC1)

ROM 16M (IC21, 22 or IC13, 14,

15, 16)

E05A91 (IC 2)

DRAMs (IC 17, 18) and SIMM

E05A92 (IC3)

I/O DATA ADDRESS

Video I/F Parallel

EEPROM (IC11)

E05A93 (IC4)

I/F

Option

RS-232 C Specific LocalTalk

ROM8 (IC12)

ADDRESS

DATA CONTROL

I/F

Figure 2-26. C169 MAIN-B Board Block Diagram

Rev. B 2-17

Operating Principles EPL-5500 Service Manual

Table 2-1 lists the functions of the main elements of the video controll er section in C169 MAIN-B Board.

Table 2-1. Functions of C169 MAIN-B Board Main Elements

Element Location Function

MB86933H RISC CPU

E05A91 ASIC IC2 This ASIC contains the following functions:

E05A92 ASIC IC3 This ASIC contains the following functions:

E05A93 ASIC IC4 This ASIC contains the following functions:

Two 8M ROMs or four 4M ROMs

8M ROM IC12 This ROM is a local language (font) ROM option (except in

IC1 The CPU, which operates at 22.5 MHz, manages the video

controller operation.

•Address decoding

•DRAM management (refresh control,

RAS/CAS contro l)

•Video signal processing

•Toner save function

•BiRITech

•EMGTech

•Video interface

•Bi-parallel interface

•LocalTalk module control

•Type-B EX interface box control

IC21,22 or IC13,14,15,16

These ROMs are code and font ROMs.

the U.S. model).

EEPROM IC11 T his EEPROM stores the following:

•Model type

•Printed page counter value

•Jam counter value

•Printer setting

DRAM IC17,18 These DRAMs are used as the working area of the CPU:

input buffer, image buffer, etc.

2-18 Rev. B

Host Computer

Input Buffer

Development

VRAM Sy stem Ar ea

DRAM

Para llel/ Seri al Conver ter

RITech EMGTech

Toner save

Temporary Buffer

CPU

MB86933H

(IC1)

E05A91

(IC2)

E05A93

(IC4)

E05A92

(IC3)

Video

EPL-5500 Service Manual Operating Principles

Print data and commands transmitted from the host computer via the parallel or optional interfaces are read using the CPU interrupt process and stored in the DRAM input buffer. Data and commands in the input buffer are processed by the CPU, which then stores the printi ng bitmap data (image data) in the V (video) - RAM (image buffer) area of the DRAM. The siz e of t he V-RAM depends on the available DRAM size. A “PRINT OVERRUN” occurs when the V-RAM is so small that the CPU cannot process data faster than it is transmitted to the engine controller boar d. If such an error occurs, the user can increase the V-RAM using the printer setting “IMAGE OPTIMUM.”

The E05A91 transmits image data st ored in the V-RAM to the E05A92. The E05A92 changes the image data format from 32-bit parallel data to serial data, and stores it in the internal tempor ary buffer. The temporary buffer has a capacity equivalent to several lines. This is controlled by the E05A92, which synchronizes and transmits the temporary buffer’s data to the engine controller board. The E05A92 then manipulates the printer data based on the BiRITech, EMGTech, and toner saver settings.

Figure 2-2 7. Data Flow D iag ram

Rev. B 2-19

+5 V

Vcc

OUT

+5 V

M51938FP (IC6)

RESET

RSTOUTRSTIN

E05A92 (IC3)

R/W AS BE0-3

RD WR

READY

Data Bus

Address Bus

CPU MB86933H (IC1)

E05A91 (IC2)

Operating Principles EPL-5500 Service Manual

2.2.1.1 Reset Circuit

The entire system (CPU and external devices) can be initialized if the RESET signal (CPU pin 113) are active simultaneously. This cir cuit uses an M51938 IC to monitor the supply voltage if a voltage level less than 4.25 V is detected. The reset time is approximately 128 ms.

Figure 2-28. Reset Circuit

2.2.1.2 Bus Control Circuit

The MB86930 CPU outputs the R/W (read/write) signal, AS ( address strobe) signal, and the BE0, BE1, BE2, and BE3 signals (byte enables) to the AS IC E05A91. The ASIC E05A91 uses these signals to generate the RD (read strobe) signal, WR (write strobe) signal, and READY signal.

Figure 2-29. Bus Control Circuit

2-20 Rev. B

EPL-5500 Service Manual Operating Principles

2.2.1.3 Interrupt Control

The ASIC E05A93 determines the priority level of the interrupt and outputs it to terminal s IRL0 IRL3. Then an interrupt is sent to the CPU. When the IRL0-3 value is 1111b, the CPU process is a non-maskable interrupt process. When the IRL0-3 value is 0000b, the CPU process is a s tandard process. When the IRL0-3 is any other value, the CPU process is a maskable interrupt process.

2.2.1.4 DRAM Management

The video controller uses DRAMs for the system RAM and for the V-RAM. In this printer, a standard two 512K × 16 DRAMs are mounted in locations IC17 and IC18, providing a total of 1MB. CN2 SIMM sockets are provided for optional SIMM memory modules. These SIMM sockets can use 1, 2, 4, 8, 16, and 32 MB SIMMs (32-bit bus).

The DRAMs (including optional SIMMs) are managed by the ASIC E05A91. E05A91 outputs MA0-10 (memory address), RAS/CAS, and WE signals.

RAS1,2

RAS0

DWE

E05A91 (IC2)

CAS0,1,2,3

MA0-10

CPU DATA BUS

DRAM (IC17)

DRAM (IC18)

SIMM

Figure 2-30. DRAM Management

Rev. B 2-21

Latch

STROBE

BUSY

DATA

E05A93 (IC4)

Operating Principles EPL-5500 Service Manual

2.2.1.5 Parallel Interfa ce Circuit

Figure 2-31 shows a circuit block diagram of the parallel interface. Data sent from the host computer is latched within the E05A 93 by the automatically to stop the hos t computer from sending additional dat a. The CPU resets the BUSY signal after reading the data f r om t he E05A93, so that t he pr inter is r eady to rec eiv e more data fr om the host computer.

STROBE signal. The E05A93 outputs a BUSY signal

Figure 2-31. Parallel Interface Circuit

2-22 Rev. B

EPL-5500 Service Manual Operating Principles

2.2.1.6 Video Interface

The ASIC E05A92 maps the SRAM into a memory space different from the system memory. The CPU transmits data from the V-RAM (in the syst em RAM) to the SRAM using the ASIC E05A92. The ASIC cell converts the image data in the SRAM from parallel to serial, synchronizes it, and then transmits it to the engine controller board. In other words, the SRAM is a temporary buffer used to transmit the image data to the engine controller board. This serial image data is called the VIDEO signal of video interface.

The signal line of the internal video interface circuit (the C125 MAIN board and engine controller board) can be broadly divided into four groups. The first group (PRINT, CPRDY, EPRDY, and PRDY) gives the status of either the video controller or engine controller and indicates whether they are ready to communicate with each other or ready to start the printing operation. The second group (VSYNC, HSYNC) is the synchronizing signal for the printing operation. The third group (VIDEO) is the serial video data signal. The fourth group (CMD, SRCLK, CTBSY, and ETBSY) is used to transfer t he commands (from t he video controller) or the s tatus (from the engine controll er) for printer mechanism control. Except for VIDEO, PRINT, VSINC, and HSYNC, all signals are controlled by ASIC E05A93.

This printer has BiRITech and EMGTech functions standard. These functions modify the VIDEO signal with the ASIC E05A92.

Rev. B 2-23

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 (C169 MAIN-B 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 Unit 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

3.2.3.8 Main Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

3.2.3.9 Paper Take-Up Sensor and Paper Take-Up Solenoid Removal. 3-21

3.2.3.10 Paper Take-Up Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

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 Roll er . . . . . . . . . . . . . . . . . . . . . . . 3-18

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

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

Figure 3-30. Removing the Motor Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Figure 3-31. Removing the Main Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Figure 3-32. Removing the Gro und Pla te . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Figure 3-33. Removing the Paper Guide ASSY. . . . . . . . . . . . . . . . . . . . . . . . 3-21

Figure 3-34. Removing the Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Figure 3-35. Removing the Paper Take-Up Roller. . . . . . . . . . . . . . . . . . . . . . 3-22

List of Tables

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

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

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

WARNING

CAUTION

EPL-5500 Service Manual Disassembly and Assembly

3.1 GENERAL INFORMATION

This chapter describes disassembly/assembly procedures to be used for replacing the main assemblies of the EPL-5500.

3.1.1 Precautio ns fo r Disas sem bl y/A ss em bly

Follow the precautions below when disassembling/assembling the printer.

❒

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).

❒

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 Y es B740200100 Round-nose pliers Yes B740400100

Rev. B 3-1

Disassembly and Assembly EPL-5500 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. Screw Types and Abbreviations

Standard

No. Type

CB(S)(P1)

CBS

CCS

Size

(mm)

36/8

36/8/14

Length

(mm)

Appearance

3 6/8/10/12

CCB

CBB

CBS(O)

Pin E-Ring

3-2 Rev. B

EPL-5500 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 3-3. Checks after Repair

Item Location Checkpoint Check

Operation Control panel Do all LEDs and button function normally?

Heater lamp Does the heater lamp turn on normally? Test print

(status sheet) Data print Does data print in all modes?

Adjustment Print position Is the gap between the top edge of the paper and

ROM version Is it the latest version? Cleaning Is toner and dust removed from the paper path?

Packing Is the consumable removed from the printer?

Is the test print performed normally?

the horizontal line in the status sheet print exactly

29.6 mm (1.17 inch).

Is the paper take-up roller cleaned? Is the roller in the fusing unit cleaned? Is the outer surface of the printer clean?

Is the unit packed securely? Are accessories packed also?

Rev. B 3-3

ASSEMBLY POINTS

Disassembly and Assembly EPL-5500 Service Manual

3.2 DISASSEMBLY AND ASSEMBLY

This section describes and illustrates the procedures for removing and disassembling the components of the EPL-5500. Cleaning is described in Chapter 6. The assembly procedures are not described, except for s pecial notes where necessary, bec ause 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 turn.

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

Upper unit

Upper unit lock release button

4. Rear Cover

3. Operation Cover

2. Front Cover

1. Left cover

Figure 3-1. Removing the Housing

3-4 Rev. B

CAUTION

EPL-5500 Service Manual Disassembly and Assembly

3.2.2 Removal of the Controller Section

The control section is comprised of the controller board (the C169 MAIN-B Board).

3.2.1.1 Main B oard (C169 MAIN-B Board) Removal

Before you remove the video controller board, make sure that you remove any optional LocalTalk/ serial board or Type-B EX box.

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

2. Remove the right cover.

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

Figure 3-2. Removing the Shield Case

4. Disconnect all connectors on the C169 MAIN-B Board.

5. Remove the 5 screws (#4) for the C169 MAIN-B Board.

6. Remove the C169 MAIN-B Board.

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

Rev. B 3-5

CAUTION

Disassembly and Assembly EPL-5500 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

❒

Do not touch the optical unit except at the time of 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 connector CN205 and CN210 from the C169 MAIN Board.

4. Remove the 6 screws (#4) from the optical unit.

5. Remove the optical unit.

Figure 3-4. Removing the Optical Unit

3-6 Rev. B

EPL-5500 Service Manual Disassembly and Assembly

3.2.3.2 Image Transfer Unit Removal

1. Open the top cover.

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

3. Remove the 2 screws (#5) 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. B 3-7

ASSEMBLY POINTS

Disassembly and Assembly EPL-5500 Service Manual

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 remove the electrode comb.

When reinstalling the electrode comb, be careful of the direction of instal latio n. Install t he electrode comb so that the terminal of the comb faces the image transfer roller drive gear.

Figure 3-8. Reinstalling the Electrode Comb

3-8 Rev. B

EPL-5500 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 C169 MAIN-B.

4. Remove harness covers A and B, and pull out the CN1 of 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 in the illustration.

Figure 3-10. Removing the Uppe r Unit

Rev. B 3-9

Disassembly and Assembly EPL-5500 Service Manual

3.2.3.4 High -Voltage Supply B oard (PWB-F) Removal

1. Open the top cover.

2. Remove 1 screw (#5) from the PWB-F cover.

3. Remove the PWB-F cover.

Figure 3-11. Removing the PWB-F Cover

4. Remove the 4 screws (#5) 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. B

EPL-5500 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 (#4:2, #7:2), and remove the PWB-E cover.

Figure 3-13. Remove the PWB-E Cover

3. Disconnect connector CN207 from the C169 MAIN-B Board.

4. Remove 4 screws (#4) and 2 screws (#6), and remove the PWB-E.

Figure 3-14. Removing the PWB-E

Rev. B 3-11

ASSEMBLY POINTS

Disassembly and Assembly EPL-5500 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 (#5), and remove the drive tension section of the fusing unit.

4. Remove the transport gear.

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

When rehooking the spring, be sure to hook it at the correct posit ion.

drive gear section of the Fusing unit

drive transport gear

hook of the spring

Figure 3-15. Gear and Spring Position

6. Remove 4 screws (#5), and remove fusing guide plate.

drive tension section of the Fusing unit

Figure 3-16. Removing the Fusing Guide Plate

3-12 Rev. B

EPL-5500 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. B 3-13

ASSEMBLY POINTS

Disassembly and Assembly EPL-5500 Service Manual

10. Remove 4 screws (#5), and remove the fusing unit.

Figure 3-19. Removing the Fusing Unit

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

Figure 3-20. Roller Position

3-14 Rev. B

CAUTION

ASSEMBLY POINTS

EPL-5500 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

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

1. Remove the fusing guide plate. (Refer to Section 3.2.3.6.)

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

Figure 3-21. Removing the Heater Lamp

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

Rev. B 3-15

ASSEMBL POINTS

Disassembly and Assembly EPL-5500 Service Manual

Thermistor

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

2. Remove the 1 screw (#4), and remove the thermistor.

Figure 3-22. Removing the Thermistor

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

Figure 3-23. Wiring

3-16 Rev. B

ASSEMBLY POINTS

EPL-5500 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 separator.

Figure 3-24. Removing the Paper Sep arator

When reinstalling the paper separators, be careful of these positions as the middle one differs from 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. B 3-17

CAUTION

Disassembly and Assembly EPL-5500 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

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.

3-18 Rev. B

Figure 3-27. Removing the Upper Fusing Roller

EPL-5500 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 (#5), and remove the thermal fuse.

Figure 3-29. Removing the Thermal Fuse

Rev. B 3-19

Disassembly and Assembly EPL-5500 Service Manual

3.2.3.8 Main Motor Removal

1. Remove the housing components. (Refer to Section 3.2.1.1.)

2. Remove 1 screw (#4) which fixing the motor bracket and the 2 screws (#2) which fixing the main motor, and remove the main motor together with the bracket.

Motor bracket

Screw (#2)

Screw (#4)

Figure 3-30. Removing the Motor Bracket

Motor bracket

Main motor

Figure 3-31. Removing the Main Motor

3-20 Rev. B

ASSEMBLY POINT

EPL-5500 Service Manual Disassembly and Assembly

3.2.3.9 Paper Take-Up Sensor and Paper Take-Up Solenoid Removal

1. Remove the housing components. (Refer to Section 3.2.1.1.)

2. Turn over the printer on its back.

3. Remove the 4 screws (#6), and remove the ground plate.

4. Turn up the lifting plate.

Screw (#6)

Ground plate

Figu re 3-32. Removing the Ground Plate

When turnning up the lifting plate, be carefull with the grounding plate which overlapping the lifting plate.

5. Remove the 2 screws (#6), and remove the paper guide assembly.

6. Remove the paper take-up sensor and the paper take-up solenoid from the assembly.

Lifting plate

Turn up the plate

Screw (#6)

Rev. B 3-21

Paper guide ASSY.

Figure 3-33. Removing the Paper Guide ASSY.

ASSEMBLY POINT

Disassembly and Assembly EPL-5500 Service Manual

3.2.3.1 0 Paper Take-Up Roller Removal

1. Remove the main motor. (Refer to Section 3.2.3.8.)

2. Remove the paper guide assembly. (Refer to Section 3.2.3.9.)

3. Remove the 6 screws (#4:2, #5:4), and remove the left frame.

4. Remove the 2 gears (GEAR 29/65T, GEAR 22/57T), specified in the figure below.

Remove Gears (2)

Paper Take-up Roller Shaft

Slide out

Figure 3-34. Removing the Gears

5. At the bottom of the printer, remove the E-ring fixing the paper take-up roller shaft.

6. Unhock the paper take-up roller and slide the shaft to the end of the shaft where the driven gear is attached, then remove the paper take-up roller.

When removing the paper take-up roller from the shaft, be sure not to lose the pin.

Paper Take-up Roller

E-Ring

Figure 3-35. Removing the Paper Take-Up Roller

3-22 Rev. B

Paper Take-up Roller Shaft

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

EPL-5500 Service Manual Adjustments

4.1 ADJUSTMENTS

This section describes the adjustment procedures for the EPL-5500. 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 s ynchronizing volume control on the main board (C169 MAIN-B). Aft er replacing a m ain board, be sure to adjust the print position using the procedure below.

1. Print a status sheet.

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

29.6 ± 2.5 mm (1.17 ± 0.01 inches) for a status sheet page on A4/letter paper: If the gap is not correct, adjust the print position as described in the next few steps.

29.6 mm

Leading Edge

EPSON EPL-5500

Status Sheet

Default Sett ings

Figure 4-1. Print Position Adjustment

3. Turn printer power off.

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

5. Adjust the image synchronizing adjus tment volume (VR201) on the main board (C169 MAIN-B) so that the gap for t he pr int position of the horizontal li ne ( down from the top edge of the sheet) becomes 29.6 mm (1.17 inches) .

•Turn VR201 clockwise to increase the gap for the print position of the horizontal line.

•Turn VR201 counterclockwise to decrease the gap.

6. Turn on the printer.

7. Print a status sheet again to check the print position.

8. Repeat steps 5 to 7 until the print position is 29.6 mm (1.17 inches).

9. Reattach the shield plate and right case.

Rev. B 4-1

Epson EPL-5500 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

SAFET Y INFORMATION

REVISION SHEET

Chapter 1 General Description

1.2 SP ECIFICAT IONS

Chapter 2 Operating Principles

Chapter 3 Disassembly and Assembly

Chapter 4 Adjustment