EPSON TERMINAL PRINTER EPL-5500 SERVICE MANUAL EPSON 4005431
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NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON’s express written permission is forbidden. 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.
PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
SAFETY INFORMATION This printer is a page printer which operates by means of a laser. There is no possibility of danger from the laser, provided the printer is operated according to the instructions in this manual provided. Since radiation emitted by the laser is completely confined within 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.
For Finland, Sweden Users; 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 Service People VAROITUS Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.
For Europe [Label inside printer] The following laser safety label will be attached inside the printer as shown below.
PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of EPL-5500. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: CHAPTER 1. GENERAL DESCRIPTION Provides a general product overview, lists specifications, and illustrates the main components of the printer. CHAPTER 2.
REVISION SHEET Revision Issue Date Revision Page Rev. A October 06, 1995 1st issue Revise the whole pages of the following chapters: Rev.
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) . .
1.5.7 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 . . . . . . .
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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-resolution printing. Maintenance is very easy as a result of various built-in diagnostic functions.
General Description EPL-5500 Service Manual Table 1-1 lists the optional units available for the EPL-5500. Table 1-1. Options for the EPL-5500 Cat. No.
EPL-5500 Service Manual General Description 1.2 SPECIFICATIONS This section provides statistical data for the EPL-5500. 1.2.1 Basic Specifications Printing method: Laser beam scanning and dry electrophotography Resolution: 600/300 dpi Printing speed: 6 ppm (letter/A4) First printing time (A4/LT): Less than 20 seconds (face-up output) Warm-up time: Less than 35 seconds (at rated current and 23° C (73° F) temperature) Paper supply: See Table 1-2. Table 1-2.
General Description EPL-5500 Service 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 mm 4.0 mm 4.0 mm Figure 1-2. Printable Area 1-4 Rev.
EPL-5500 Service Manual General Description Usability of special papers: See Table 1-4. Table 1-4. Usability of Special Papers Input OHP Envelopes Labels Card Stock Letterhead Standard built-in paper tray P P P P R 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.
General Description EPL-5500 Service Manual 1.2.2 Electrical Specifications Table 1-5. Electrical Requirements and Ranges Description Rated voltage Input voltage range 100 V Version 200 V Version 100 ∼ 120 VAC 220 ∼ 240 VAC 90 ∼ 132 VAC 198 ∼ 264 VAC Rated frequency range 50 ∼ 60 Hz Input frequency range 47 ∼ 63 Hz Power consumption Less than 500 W Power consumption while in standby mode Less than 600 W Less than 15 W (without option) 1.2.
EPL-5500 Service Manual General Description 1.2.6 Applicable Standards Safety Standards 120 VAC model: 220/240 VAC model: UL 1950, CSA 22.2 No.
EPL-5500 Service Manual General Description 1.2.9 Software Specifications HP LaserJet 4 emulation (PCL 5e) EPSON GL/2 mode (GL-like mode) 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.
General Description EPL-5500 Service Manual Table 1-7. Built-in Fonts (Continued) Resident Fonts Scalable fonts Swiss 742Bold Italic SWC Swiss 721Roman SWM Swiss 721Bold SWM Swiss 721Oblique SWM Swiss 721Bold Oblique SWM Dutch 801Roman SWM Dutch 801Bold SWM Dutch 801Italic SWM Dutch 801Bold Italic SWM Symbol SetSWA More WingBatsSWM CourierSWC CourierBold SWC CourierItalic SWC CourierBold Italic SWC S: Supported, NS: Not Supported 1-8 Applicable Mode HP LJ4 GL/2 S S S S S S S S S S S S S S S Rev.
EPL-5500 Service Manual General Description 1.3 INTERFACE SPECIFICATIONS The EPL-5500 is equipped with the following external interfaces: ❏ Parallel interface ❏ Optional LocalTalk/serial interface ❏ Optional Type B interface with Type-B EX box 1.3.1 Parallel Interface The parallel interface has the following two modes: ❏ Compatibility mode (same as parallel interface for EPSON’s current page printer) ❏ Reverse mode 1.3.1.
General Description EPL-5500 Service Manual Table 1-8. Parallel Interface Pin Assignments Pin No. Signal Name STROBE I/O IN 1 DATA 1-8 2-9 IN Description 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. DATA 1 to 8 are parallel data bits. When the signal 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.
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) receptacle Applicable plug: 57-30360 (Amphenol or equivalent) Signal description: See Table 1-9. Table 1-9. Parallel Interface Pin Assignment Pin No.
General Description EPL-5500 Service Manual Compatibility M ode Forward D ata Transfer S TROB E ACK and BUSY Forward Idle SLCT IN=HIGH ERR=HI GH No data sent Terminate Failed Negotiation Negotiation SLCT I N=LOW E RR=L O W Sending data E RR = L O W Sending data Host Busy Data Not Available ERR=HI GH No data sent Reverse Dat a Transfer A UT O FEED=LOW Reverse Idle A UT O FE ED=L OW Request to send data Host Busy Dat a Available A UT O FEED=HIG H ERR= LO W Interrupt Ho st Figure 1-4.
EPL-5500 Service Manual General Description Figure 1-5 shows the negotiation timing chart. DATA 00h or 04h SEL-IN STROBE AUTO-FEED ACKNLG BUSY PE Peripheral Busy Status Current Peripheral Status Note1 SLCT ERROR Note 2 Current Peripheral Status Note1 Compatibility Negotiation HB DA or HB DNA (Note 3) Idle or Transfer 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.
General Description EPL-5500 Service Manual Figure 1-7 shows the timing chart for termination. DATA SEL-IN STROBE AUTO-FEED Note 3 ACKNLG BUSY Peripheral Busy Status PE Note 1 SLCT Note 2 ERROR Note 1 HB DNA, Idle, or HB DA Peripheral Busy Status Current Peripheral Status Current Peripheral Status Termination Compatibility Figure 1-7. Termination Timing Chart Notes: 1. The signal is HIGH when HB DNA. The signal is LOW when HB DA. 2.
EPL-5500 Service Manual General Description 1.3.2 Serial Interface This printer can use the optional LocalTalk/serial interface module.
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.
EPL-5500 Service Manual General Description 1.3.3 Optional LocalTalk Interface This printer can use the optional LocalTalk/ serial interface module. Type: LocalTalk Signal level: Same as RS-422 signal level Protocol: X-ON/X-OFF (cannot be combined with DTR control) DTR control (cannot be combined with X-ON/X-OFF) Transfer speed: 230.4K bps Signal description: See Table 1-11. Table 1-11. LocalTalk Interface Pin Assignments Pin No.
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 Panel 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.
EPL-5500 Service Manual General Description Functions of Pressing the Button ❏ While the Red light flashes slowly: Function of button Operation Clears an error. Hold down the button until the yellow and Red lights both go on after release. The printer prints a status sheet indicating the error type. ❏ While the Red light flashes fast: Function of button Prints any of the following page.
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 printer settings options. Table 1-12.
EPL-5500 Service Manual ESCP2 * (Continued) FX* I239X* General Description Auto CR ON, OFF Auto LF OFF, ON Bit Image Dark, Light, BarCode Zero Char 0, φ 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, PcCanFrenc, PcNordic, PcTurk2, Pc.E.
General Description EPL-5500 Service Manual Table 1-12.
EPL-5500 Service Manual General Description 1.4.3 Service Mode This printer has the following four service modes: ❏ 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 corresponding timing shown in table below. Table 1-13.
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 mode, turn on the printer while holding 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 flashing. 3. Press the button the number of times for the 2nd code, while the red light is flashing.
EPL-5500 Service Manual EMULATION PARALLEL SERIAL* General Description LJ4 2 1 1 ESCP2* 2 1 2 FX* 2 1 3 I239X* 2 1 4 PS* 2 1 5 GL2 2 2 1 AUTO* 2 2 2 LJ4 2 3 2 ESC/P2* 2 3 3 FX* 2 3 4 I239X* 2 3 5 PS* 2 4 1 GL/2 2 4 2 AUTO* 2 4 3 LT* AUX* SERIAL* LT* AUX* SERIAL* LT* AUX* SERIAL* LT* AUX* SERIAL* LT* AUX* SERIAL* LT* AUX* SERIAL* LT* AUX* * With option Rev.
General Description EPL-5500 Service Manual Table 1-14. Default Settings Code (Continued) Menu ESC/P2* / FX* STATUS SHEET PRINTING Item CG Table LANGUAGE PAGE SIZE ORIENTATION MANUAL FEED TONER SAVER JOB CONFIG RESOLUTION AUTO CONT STANDBY INTERFACE Available Options PcUSA Deafult Settings Codes 1st 2nd 3rd Code Code Code 2 5 3 Italic 2 5 4 PcMultilin 2 5 5 PcPortugue 3 1 1 PcCanFrenc 3 1 2 PcNordic 3 1 3 PcTurkish 3 1 4 PcE.
EPL-5500 Service Manual General Description 1.4.4 Display of Messages This printer indicates three types of messages with the LED lights or status sheet: status messages, 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.).
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 are selected by “INTERFACE” in the printer settings 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.
EPL-5500 Service Manual General Description 1.4.6 Emulation Mode Switch Function This section describes the emulation 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.
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 map data fits the development characteristics of the printer mechanism well. It is therefore necessary to set appropriate values 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.
EPL-5500 Service Manual General Description 1.4.8 Toner Save Mode The Toner Save Mode uses about 50% less toner than normal. The printer saves toner by substiuting 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 U pper E dge Left Edge Figure 1-16.
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 replacement.
EPL-5500 Service Manual General Description 1.5.1 C169 MAIN-B Board The C169 MAIN-B board is a video controller and engine controller board. The primary functions 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.
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. CAUTION Do not touch VR1 on PWB-E board. This volume is for factory setting only. VR1 F1 Figure 1-19. PWB-E Board 1.5.
EPL-5500 Service Manual General Description 1.5.4 Optical Unit The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) which drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by the laser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrors and lenses, to create a latent electro-photographic image on the drum. Figure 1-21. Optical Unit 1.5.
General Description EPL-5500 Service Manual 1.5.6 Photoconductor Unit Core mechanisms of the printing process, such as charging and imaging, are integrated into this unit. Figure 1-23. Photoconductor Unit 1.5.7 Developing Cartridge Core mechanisms of the printing process, such as developing, are integrated into this cartridge. 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. Figure 1-24.
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-20. Figure 2-21. Figure 2-22. Figure 2-23. Figure 2-24. Figure 2-25. Figure 2-26. Figure 2-27. Figure 2-28. Figure 2-29. Figure 2-30. Figure 2-31. High-Voltage Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Print Sequence (Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Print Sequence (End). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. 4 7 5 6 3 8 2 1 9 19 10 11 18 17 12 Optional Second Paper Feeding Unit 16 15 14 13 Figure 2-1. Main Components 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
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. Optical Unit Print Exit Fusing Exposure Drum Cartridge Drum Charge Image Transfer Toner Hopper Development Toner Cartridge Paper Feeding Tray Second Paper Feeding Unit (optional) Manual Feed (1 sheet) Multi Feeding (150 sheets) Multi Feeding (250 sheets) Figure 2-2. Print Process Diagram 2-2 Rev.
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 the 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 the paper take-up roller is transported to the transport roller, pre-image transfer roller, and then exit roller. After this, the paper is fed out onto the print tray.
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 transmitted to the paper take-up and transport sections in the unit via the drive transmission 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.
EPL-5500 Service Manual Operating Principles 2.1.1.3 Laser Exposure The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start of scan) sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timing for each scan line. Charged Surface C169 MAIN-B Reflector Mirror IC201 CN210 1 5 Laser-Exposed Surface: (Approx. -50 V) CN205 PWB-D 1 M2 SOS Sensor Laser Diode 7 Figure 2-6. Laser Exposure 2.1.1.
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 Housing Electrode Comb Pre-Image Transfer Roller C169 MAIN-B Electrode Comb IC201 PWB-F PWB-S 1 CN204 1 1 8 8 Housing 1 Pre-Image Transfer Roller 8 CN1F 8 Housing Ground Image Transfer Bias Figure 2-8. Image Transfer 2.1.1.
EPL-5500 Service Manual Operating Principles 2.1.2 Engine Control This section describes engine control, the power supply board, and the high-voltage supply board. The engine is controlled by the main board (C169 MAIN-B Board). Figure 2-10 shows the engine controller connecting diagram.
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. Toner Cartridge Sleeve Roller A Paper Exit Roller Upper Fusing Roller Lower Fusing Roller PC Drum Pre-image Transfer Roller Main Motor (M1) A Optional Second Paper Feeding Unit Paper Take-Up Roller Paper Transport Roller Fig.2-11. Gear and Roller Positions 2-8 Rev.
EPL-5500 Service Manual Operating Principles Figure 2-12 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motor controlled by the CPU (IC201) on the main board (C169 MAIN-B). This board has a stepping motor driver IC that drives the M1 main motor with a constant current. Main Board C169 MAIN-B Main Motor M1 C N 206 A A B B 1 2 3 4 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.
Operating Principles EPL-5500 Service Manual 2.1.2.3 Fuser Control The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receives a FUSER signal from the main board (C169 MAIN-B), the power supply board (PWB-E) supplies the AC voltage to the heater lamp. This AC voltage is cut by an interlock switch when the case is open. Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analog voltage to the 77-pin chip, IC201.
EPL-5500 Service Manual Rev.
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.
EPL-5500 Service Manual Operating Principles 2.1.2.5 Laser Diode Drive Figure 2-17 shows the laser diode drive circuit. Laser diode emission is controlled by three signals (LDATA, LDAPC1, and LDAPC2) from the main board (C169 MAIN-B). Laser Diode SSCAN LD_CTL LDAPC1 LDAPC2 SOS Mirror LD SOS (PWB-D) L DATA SOS Sensor Main Board (C169 MAIN-B) Figure 2-17. Laser Diode Drive Circuit The LDATA signal is the laser on/off signal.
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 voltage control circuit. These bias voltages are generated from the +24 VDC from the high-voltage supply board (PWB-F). If the printer detects a case-open condition, the interlock switch is set to off, which cuts the +24 VDC, which, in turn, cuts the bias voltages.
EPL-5500 Service Manual Operating Principles Figure 2-21 shows the print process. Brush Roller Charging Laser Exposure PC Drum Development Image Transfer Figure 2-21. Print Process Figure 2-22 shows the start print sequence. The printer’s engine starts printing when it receives the PRINT signal from the video controller circuit.
Operating Principles EPL-5500 Service Manual 2.1.2.7 Fan Motor Control The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotates during printing. When printing ends, the fan motor stops after 3 min. If the following condition is detected, the printer indicates a 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.
EPL-5500 Service Manual Operating Principles 2.2 VIDEO CONTROLLER OPERATION The video controller section generates the video signals 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.
Operating Principles EPL-5500 Service Manual Table 2-1 lists the functions of the main elements of the video controller section in C169 MAIN-B Board. Table 2-1. Functions of C169 MAIN-B Board Main Elements Element MB86933H CPU Location RISCIC1 Function The CPU, which operates at 22.5 MHz, manages the video controller operation.
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 printing bitmap data (image data) in the V (video) -RAM (image buffer) area of the DRAM. The size of the V-RAM depends on the available DRAM size.
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 circuit 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. +5 V +5 V Vcc OUT RSTIN M51938FP (IC6) + RESET RSTOUT E05A92 (IC3) C Figure 2-28. Reset Circuit 2.2.1.
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 terminals 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 standard process. When the IRL0-3 is any other value, the CPU process is a maskable interrupt process. 2.2.1.
Operating Principles EPL-5500 Service Manual 2.2.1.5 Parallel Interface Circuit Figure 2-31 shows a circuit block diagram of the parallel interface. Data sent from the host computer is latched within the E05A93 by the STROBE signal. The E05A93 outputs a BUSY signal automatically to stop the host computer from sending additional data. The CPU resets the BUSY signal after reading the data from the E05A93, so that the printer is ready to receive more data from the host computer.
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 system 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.
Chapter 3 Disassembly and Assembly Table of Contents 3.1 GENERAL INFORMATION 3.1.1 Precautions for Disassembly/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2 Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.4 Service Checks after Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-24. Figure 3-25. Figure 3-26. Figure 3-27. Figure 3-28. Figure 3-29. Figure 3-30. Figure 3-31. Figure 3-32. Figure 3-33. Figure 3-34. Figure 3-35. Removing the Paper Separator . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Exit Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing the G-Rings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing the Upper Fusing Roller . . . . . . . . . . . . . . . . . . . . . . .
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 Precautions for Disassembly/Assembly Follow the precautions below when disassembling/assembling the printer. WARNING ❒ Disconnect the power cord before disassembling/assembling the printer. ❒ Be sure to handle the fusing unit carefully, because the unit remains hot for a while after the printer stops printing.
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 Appearance Size (mm) Length (mm) 4 8 3 6/8 3 6/8/14 3 6/8/10/12 3 8 3 8 3 8 CB #1 CB(S)(P1) #2 CBS #3 CCS #4 CCB #5 CBB #6 CBS(O) #7 Pin E-Ring 3-2 Rev.
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.
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 special notes where necessary, because assembly can be accomplished by performing disassembly in reverse. 3.2.1 Housing Removal This section describes how to remove the cases and the rear frame. 3.2.1.1 Case Removal 1.
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 Board (C169 MAIN-B Board) Removal CAUTION 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.
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 CAUTION ❒ 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.
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.
Disassembly and Assembly EPL-5500 Service Manual ASSEMBLY POINTS 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. ASSEMBLY POINTS When reinstalling the electrode comb, be careful of the direction of installation. Install the 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.
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.) A B Figure 3-9. Removing the Harness Cover 6. Slide and remove the unit as in the illustration. Figure 3-10.
Disassembly and Assembly EPL-5500 Service Manual 3.2.3.4 High-Voltage Supply Board (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.
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.
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. ASSEMBLY POINTS When rehooking the spring, be sure to hook it at the correct position.
EPL-5500 Service Manual 7. Disassembly and Assembly 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.
Disassembly and Assembly EPL-5500 Service Manual 10. Remove 4 screws (#5), and remove the fusing unit. Figure 3-19. Removing the Fusing Unit ASSEMBLY POINTS After reinstalling the fusing 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.
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 CAUTION Do not touch the glass surface of the lamp with your bare hands. 1. Remove the fusing guide plate. (Refer to Section 3.2.3.6.) 2. Pull the heater lamp out of the lamp holder from the front side. Figure 3-21.
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 ASSEMBL POINTS When reinstalling the thermistor, wire the harness as shown below. Figure 3-23. Wiring 3-16 Rev.
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 Separator ASSEMBLY POINTS 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.
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 CAUTION When reinstalling the G-rings: ❒ Be careful of the direction. ❒ Securely position them into the grooves of the fusing roller. 3. Remove the upper fusing roller drive gear. 4. Remove the upper fusing roller. Figure 3-27. Removing the Upper Fusing Roller 3-18 Rev.
EPL-5500 Service Manual 5. Disassembly and Assembly 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.
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.
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 Figure 3-32. Removing the Ground Plate ASSEMBLY POINT When turnning up the lifting plate, be carefull with the grounding plate which overlapping the lifting plate. 5.
Disassembly and Assembly EPL-5500 Service Manual 3.2.3.10 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.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 synchronizing volume control on the main board (C169 MAIN-B). After replacing a main board, be sure to adjust the print position using the procedure below. 1.
Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 SELF-DIAGNOSTIC FUNCTION 5-1 5.2.1 SOFT ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5.2.2 Service Call Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 5.3 TROUBLESHOOTING 5-4 5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 5.3.2 Print Quality Anomaly . . . . . . . . . . . . . . . .
EPL-5500 Service Manual Troubleshooting 5.1 OVERVIEW The EPL-5500 has a sophisticated, built-in, self-diagnostic function that reduces the troubleshooting time by identifying failed parts or components. This self-diagnostic test identifies the troubleshooting problems for page printers, in which even a trivial failure can result in a serious print quality problem. 5.
Troubleshooting EPL-5500 Service Manual 5.2.2 Service Call Error If the printer detects a fatal error that unrecoverable by the user, the printer indicates it with the LED lights as "Service Call Error". There are two types of "Service Call Error" as explained below, and each error is indicated by the LED lights of the control panel in different manner. Service Call A Errors Indication: First, yellow and red LED lights go on and off twice alternately.
EPL-5500 Service Manual Troubleshooting Note that if any digit of corresponding error number is "0", both yellow and red LED lights go on and off once at the same time. Rev.
Troubleshooting Example: EPL-5500 Service Manual "Standard ROM error" (error number = 1130) Order LED (Yellow) LED (Red) 1 ON OFF Short 2 OFF ON Short 3 ON OFF Short 4 OFF ON Short 5 ON OFF Short 6 OFF ON Short 7 OFF OFF Long 8 ON OFF Short 9 OFF OFF Long 10 OFF ON Short 11 OFF OFF Long 12 ON OFF Short 13 OFF OFF Short 14 ON OFF Short 15 OFF OFF Short 16 ON OFF Short 17 OFF OFF Long 18 ON ON Short 19 OFF OFF Long Interval Stat
EPL-5500 Service Manual Troubleshooting Error No.
Troubleshooting EPL-5500 Service Manual 5.3 TROUBLESHOOTING This section describes troubleshooting abnormal operations and print quality problems. 5.3.1 Troubleshooting of Abnormal Operation This section describes how to detect malfunctions, and determine the cause, and it suggests what actions to take for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting table. Table 5-4.
EPL-5500 Service Manual Troubleshooting Table 5-5. The Printer Does Not Operate at All Cause Step Checkpoint Finding Solution Connector CN207 on the C169 MAIN-B Board may be disconnected. 1 Is connector CN207 on the C169 MAIN-B Board disconnected? Yes Connect CN207 on the board. The fuse on the PWB-E board may be blown.
Troubleshooting EPL-5500 Service Manual Cause Step Checkpoint Finding Solution The interlock switch lever is bad. 1 Does the switch turn on when the case is closed? No Replace the interlock lever. The interlock switch may be dead. 2 Does the switch toggle? (Check with a multimeter.) No Replace the interlock switch. 3 With power on, is there an output of +24 VDC between pin 1 (+) and pin 2 (–) for CN207 on C169 MAIN-B board? No The paper take-up sensor flag position may be incorrect.
EPL-5500 Service Manual Troubleshooting Table 5-8. The LED Does Not Come On (2) Cause Step Checkpoint Disconnect connector CN203 on the C169 MAIN-B Board and check the coil resistance between pin 5 and pin 6 on the dis- connected cable side of the connector, using a multimeter. Is the resistance approximately 80 ohms? The paper take-up solenoid coil may be open or shorted. 1 If the coil is shorted, check the solenoid drive circuit using the procedure below: 1. Set the multimeter for voltage. 2.
Troubleshooting EPL-5500 Service Manual Table 5-8. The LED Does Not Come On (2) (Continued) Cause Step Disconnect connector CN206 on the C169 MAIN-B Board, and check the coil resistance between: pin 1 and pin 2; pin 3 and pin 4 (2 points total) on the disconnected cable side of the connector, using a multimeter. Pin 1 — Pin 2 Pin 3 — Pin 4 Are the resistances of all four points approximately 10 ohms? The main motor coil may be open or shorted. 2 Paper take-up sensor flag position may be incorrect.
EPL-5500 Service Manual Troubleshooting Table 5-9. The LED Does Not Come On (3) Cause The standard problems. Step tray has 1 2 Rev. B Is the standard tray OK? Disconnect junction connector near the solenoid and check the coil resistance between pin 1 and pin 2 on the disconnected solenoid side of the connector, using a multimeter. Is the resistance approximately 80 ohms? The paper take-up solenoid coil for the lower paper cassette may be open or shorted.
Troubleshooting EPL-5500 Service Manual Table 5-10. The LED Does Not Come On (4) Cause Step The consumables may not be installed. 1 The paper take-up roller may be bad. 2 The paper feed roller may be bad. The fusing unit may be bad. Checkpoint Finding Are the consumables installed? Solution No Install consumables. the Does paper always jam in paper take-up roller area? Yes Replace the paper take-up roller.
EPL-5500 Service Manual Cause The optical unit may be bad. The C169 MAIN-B Board may be bad. Rev. B Troubleshooting Step 1 2 Checkpoint — — Finding Solution — Replace the optical unit. — Replace the C169 MAIN-B Board.
Troubleshooting EPL-5500 Service Manual Table 5-15. Laser Light Error Cause Step The optical unit may be dead. 1 The C169 MAIN-B Board may be dead. 2 Checkpoint Finding Solution — Replace the optical unit. — Replace the C169 MAIN-B Board. Finding Solution — Replace the C169 MAIN-B Board. Finding Solution — — Table 5-16. Communication Error Cause Step The C169 MAIN-B Board may be bad. 1 Checkpoint — Table 5-17. EEPROM Write Error Cause Step The EEPROM is may be bad.
EPL-5500 Service Manual Troubleshooting Table 5-21. C1003 Error Cause Step Checkpoint Finding The optional SIMM may be bad. 1 Is the operation OK after you remove the optional SIMM? Yes The C169 MAIN-B Board may be bad. — 2 Solution Replace the SIMM. — Replace the MAIN-B Board. C169 Table 5-22. C1130 Error Cause Step Checkpoint Finding Solution The program ROMs on the C169 MAIN-B Board may be bad.
Troubleshooting EPL-5500 Service Manual Table 5-26. C1320 Error Cause Step The optional interface card may be bad. 1 The C169 MAIN-B Board may be bad. 2 Checkpoint — — Finding Solution — Replace the optional interface card. — Replace the MAIN-B Board. C169 Table 5-27. C1990 Error Cause Step The C169 MAIN-B Board may be bad. 1 5-16 Checkpoint — Finding — Solution Replace the MAIN-B Board. C169 Rev.
EPL-5500 Service Manual Troubleshooting 5.4.2 Print Quality Anomalies This section describes how to isolate possible causes of a print quality problem . Table 5-28. Print Quality Anomalies Symptom Low image density Possible Cause Poor development PWB-F board Image problem Foggy background Part Name transferImage unit Check Item — Remedy Replace board. the PWB-F the transferCheck to see if theReplace surface of imagetransfer unit. transfer unit is damaged. image PWB-F board — Replace board.
Troubleshooting EPL-5500 Service Manual Table 5-28. Print Quality Anomalies (Continued) Symptom Blank print Possible Cause Part Name Check whether toner cartridge installed properly. Poor development Imaging cartridge Remedy theReinstall iscartridge. the toner PWB-F board — Replace board. the PWB-F Improper charging PWB-F board — Replace board. the PWB-F transferCheck the surface ofReplace the the image transfer unit. transfer unit.
EPL-5500 Service Manual Troubleshooting Table 5-28. Print Quality Anomalies (Continued) Symptom Possible Cause Part Name Toner smudges onImproper charging PWB-F the back side of the sheet. Poor development PWB-F Check Item Remedy — Replace board. the PWB-F — Replace board. the PWB-F Improper fusing Fusing unit — Replace the fusing unit. Offset print Improper fusing Fusing unit — Replace the fusing unit. White spots Poor transfer imageImage unit PWB-F Rev.
Chapter 6 Maintenance Table of Contents 6.1 MAINTENANCE 6.1.1 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.1.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.1.2 Replacement of Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.2 Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.2.1 Periodic Service Maintenance . . .
6-ii Rev.
EPL-5500 Service Manual Maintenance 6.1 MAINTENANCE The EPL-5500 is a page printer that uses an electrophotographic printing method. Unlike most impact or ink-jet printers, the key components in the electrophotographic process are integrated into two expendable units (the photoconductor unit and toner cartridge). Therefore, periodic replacement of them is essential to ensure high-quality output.
Maintenance EPL-5500 Service Manual 6.1.1.2 Replacement of Consumables This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductor unit is 20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-size pages with a 5% print ratio. If printed images become faint, remove the toner cartridge and gently shake it. This will distribute the toner and may make the images darker.
EPL-5500 Service Manual Rev.
Appendix A Reference Materials Table of Contents A.1 CONNECTOR PIN ASSIGNMENTS A-1 A.1.1 Main Board (C169 MAIN-B Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 A.2 CIRCUIT DIAGRAM A-11 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-16 List of Figures Figure A-1. Cable Connections for the Video Controller . . . . . . . . . . . . . . . . . . A-1 Figure A-2. Cable Connections for the Engine Controller . . . . . . . . . . . . . . . . . A-2 Figure A-3. C169 MAIN-B Circuit Diagram (1/2) . . . .
EPL-5500 Service Manual Appendix A.1 CONNECTOR PIN ASSIGNMENTS Figures A-1 and A-2 illustrate the interconnection of the primary components. Table A-1 gives the size and a description of each connector. C169 MAIN-B Boad Video Controller Section CN1 Parallel I/F CN2 RAM SIMM CN4 LocalTalk/Serial I/F module or Type-B EX ROM SIMM CN5 Figure A-1. Connections for the Video Controller Rev.
Appendix EPL-5500 Service Manual Main motor CN206 1 2 3 4 M1 Po lyg on mot or C N 1 M 1 2 M2 ϕA ϕA ϕB ϕB C169 MAIN-B Board CN2 10 5 4 3 2 1 3 4 Fan mot or POLYGON CTL DC 5V GND D C2 4V N . C. CN211 1 FA N 2 D C2 4V M3 Paper Exit sen sor C N3 S 3 CN2 08 1 A N OD E (PC 1 ) 2 1 2 GND 3 PC3 PC3 Paper Take-up sensor C N1 S 3 2 1 CN2 03 1 ANODE (PC1) 2 GND 3 PC1 PC1 4 N . C.
EPL-5500 Service Manual Appendix Table A-1.
Appendix EPL-5500 Service Manual A.1.1 Main Board (C169 MAIN-B Board) Table A-2. CN2 Pin Assignments Pin No.
EPL-5500 Service Manual Appendix Table A-2. CN2 Pin Assignments (Continued) Pin No.
Appendix EPL-5500 Service Manual Table A-3. CN4 Pin Assignments (Continued) Pin No.
EPL-5500 Service Manual Appendix Table A-4. CN5 Pin Assignments Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 Rev.
Appendix EPL-5500 Service Manual Table A-4. CN5 Pin Assignments (Continued) Pin No.
EPL-5500 Service Manual Appendix Table A-7. CN204 Pin Assignments Pin No. 1 2 3 4 5 6 7 8 Signal Name HV-C HV-T HV-S HV-S2 HV-B BIAS-M GND2 +24 I/O — I — — O — — Description Ground +24 VDC Table A-8. CN205 Pin Assignments Pin No. 1 2 3 4 5 6 7 Signal Name SSCAN LD-CTL LDAPC2 LDAPC1 GND1 LDATA +5V I/O I I O O — O — Description Horizontal synchronous signal Laser power signal Laser power adjust 2 Laser power adjust 1 Ground Laser data +5 VDC Table A-9. CN206 Pin Assignments Pin No.
Appendix EPL-5500 Service Manual Table A-12. CN209 Pin Assignments Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Signal Name +24 V FEED2 NC +5V GND1 PE2 PSIZ0 PSIZ1 PSIZE2 CHECK1 CHECK2 CHECK3 I/O — O — — — I Description +24 VDC Lower cassette solenoid on No connected +5 VDC Ground Lower cassette paper empty Table A-13. CN210 Pin Assignments Pin No. 1 2 3 4 5 Signal Name NC +24V GND2 +5V P-CTL I/O — — — — O Description Not connected +24 VDC Ground +5 VDC Polygon motor control Table A-14.
EPL-5500 Service Manual Appendix A.2 CIRCUIT DIAGRAMS A24 R30 A25 R69 A26 R70 A21 R108 10K 10K 10K 10K IRL[0..3] AD[0..7] IC1 VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC C2 0.1U C3 0.1U C4 0.1U C47 0.1U C48 0.
Rev. A CN206 GN D1 + 5V + 24V GND2 1 A 2 A 3 B 4 B 3 4 1 2 5 2 1 TP TP 202 FUSER CN207 1 2 4 5 3 7 1 6 4 3 2 5 2 +5V 1 TH +24V FA N C N211 CN202 NC + 24V +5V P_CTL GND2 CN210 +5V SSCA N LDATA LDAP C1 LDAP C2 LD_C TL GN D1 CN205 1A R 207 R203 TP TP203 C201 220U /16V TP TP201 200m A 3.0K 1.0% 0.1U C243 0.1U C259 0.1U C258 33 680 R206 R253 0.01U C239 13 820P 56K 820P C211 R 218 C209 2.
L N 3 1 CN3 5 3 25 9 -0 32 0 N L F1 6.3 A , 12 5 V R1 4 70 K C1 0 .22 u F 1 25V NR 1 ENC2 71D -1 0 Z7D2 71 L1 Z 0 408 , Z 04 6 2 C4 C3 C3 , C 4 220 0pF 125 V C2 0.1u F 12 5V C5 2 20 0 pF 1 25 V BD 1 D 2 5 8A 50 D 2 S 86 0 T h1 10 0 -g, M 1 00 1 0C , M 1 00 0 7 C N T H9 D 1 0 0L A C5 3 30u F 2 00V + C8 6 80p 1 kV 5 00V R5 22 2W C19 0.01 u 25 0V L 10 R 24 1 0 0K 0 .5W D4 EU 2A, A GIC ER A22-06 Q1 2S K1 445 2S K1 446 R7 4.7 ZD2 H Z S15 R 11 68 K R4 22 0K -18 0K 0.25 W R5 390 K 0.
Rev. A 3 2 HE A TE R 36 0W L. 1 IN L1 3 N. L. HEA TE R 2 36 0W 1 C N2 SW1 W H2 W H1 C1 2 50 V 0 .3 3 u F F1 2 50V 5A VS1 4 70 V L1 C M 1 02 R2 1 /4W 4 70K R1 1 /4 W 4 70 K C3 2 50 V 2 20 0 p F C2 2 50 V L2 2 20 0p F C M 1 02 C4 250 V 0.1 u F RC1 6 0 0V , 1 .5A C7 4 0 0V 8 2 uF RT1 10 VS2 47 0 V R6 2W 10 0 + C9 1KV 1 00 pF C 21 2 50V 0 .1u F R1 2 4.7 K 1/4 W Q2 50 V 2A Q1 80 0V 3A C 22 0 .0 1u F R22 1/2W 33 C 11 0.
Appendix EPL-5500 Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUT Figure A-7. C169 MAIN-B Component Layout (Front) A-16 Rev.
EPL-5500 Service Manual Appendix Figure A-8. C169 MAIN-B Component Layout (Rear) Rev.
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