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Epson EPL-5500 User's Manual

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4. Image 1st 1510 Transfer 2nd 1680 Figure 2 22 Print Sequence Start Figure 2 23 is the end of the print sequence Polygon Motor M3 Paper Exit Sensor PC3 Main Motor M1 Drum Charge Laser Exposure Development Image Transfer Figure 2 23 Print Sequence End Rev B 2 15 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 8 Power Supply Circuit Function and Safety Protection The printers power supply board PWB E supplies the 5 VDC and 24 VDC The 24 VDC is used as the bias voltage supply main motor M1 drive scanner motor M2 drive fan motor M3 drive and solenoid drive For safety protection the 24 VDC line is cut when the interlock switch case open switch is off Interlock SW 9 24 VDC Power Supply Board 5 VDC AC IN PWB E SG FG Figure 2 24 Power Supply Circuit Block Diagram 2 16 Rev B EPL 5500 Service Manual Operating Principles 2 2 VIDEO CONTROLLER OPERATION
5. 3 12 Figure 3 16 Removing the Fusing Guide Plate 3 12 Figure 3 17 Removing the Harness 3 13 Figure 3 18 Removing the Fusing Entrance Guide 3 13 Figure 3 19 Removing the Fusing 3 14 Figure 3 20 Roller 5 3 14 Figure 3 21 Removing the Heater Lamp 3 15 Figure 3 22 Removing the 3 16 PIQUIE 3 23 SWING oos ds RIA As eee eke thon ta ti 3 16 Figure 3 24 Removing the Paper 3 17 Figure 3 25 Paper Exit 3 17 Figure 3 26 Removing the 5 3 18 Figure 3 27 Removing the Upper Fusing 3 18 Figure 3 28 Removing the Lower Fusing 3 19 Figure 3 29 Removing the Thermal 3 19 Figure 3 30 Removing the Motor 3 20 Figure 3 31 Removing the Main 3 20 Figure 3 32 Removing the Ground Plate 3 21 Figure 3 33 Removing the Paper Guide ASSY 3 21 Figure 3 34 Removing the
6. 2 6 Figtte 2 9 FUSING QM o eed ta dt eoa lo ior rre ES urs 2 6 Figure 2 10 Engine Controller Connecting Diagram 2 7 Figure 2 11 Gear and Roller 2 8 Figure 2 12 Main Motor Drive 2 9 Figure 2 13 Paper Take Up Sensor and Paper Exit Sensor On Off Timing 2 9 Figure 2 14 Fuser Control 2 10 Figure 2 15 Temperature for Fuser Control Procedure 2 10 Figure 2 16 Scanner Motor Control 2 11 Figure 2 17 Laser Diode Drive 2 12 Figure 2 18 LDATA Generation 2 12 Figure 2 19 Laser Emission Power Adjustment 0 2 12 Figure 2 20 High Voltage Supply Block Diagram 2 13 Figure 2 21 Print 2 14 Figure 2 22 Print Sequence 5 2 14 Figure 2 23 Print Sequence 2 14 Figure 2 24 Power Supply Circuit Block 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 D
7. 1 36 1 5 8 Lower Paper Cassette 1 36 List of Figures Figure 1 1 Exterior View of the EPL 5500 1 1 Figure 1 2 Printable 1 4 Figure 1 3 Compatibility Mode Signal Timing 1 9 Figure 1 4 Parallel Interface State Switch 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 1 14 Figure 1 6 Timing Chart of Interrupt L sos ia eve a ba B 1 14 Figure 1 9 Control Panel 1 18 Figure 1 10 Port Fixed 1 28 Figure 1 11 Auto Sense 1 28 Figure 1 12 Emulation Switch by 1 29 Figure 1 13 Intelligent Emulation Switch 1 29 Figure 1 14 Effect of RHOeC baro eremo EX IEEE 1 30 Figure 1 15 RITech Adjustment ori o e enn ke Re 1 30 Figure 1 16 Toner Save 1 31 Figure 1 17 Component 1 32 Figure 1 18 C169 MAIN B 1 33 Figure 1 1
8. mim AJOIN gt SERIAL LT AUX SERIAL ESC P2 LT AUX SERIAL LT AUX SERIAL LT AUX SERIAL LT AUX SERIAL LT AUX SERIAL LT AUX With option ev General Description EPL 5500 Service Manual Table 1 14 Default Settings Code Continued Deafult Settings Codes 1st 2nd 3rd Code Code Code Available Options Co ESC P2 CG Table PcUSA Italic PcMultilin PcPortugue PcCanFrenc PcNordic PcTurkish PcE Europe BpBRASCII BpAbicomp STATUS SHEET LANGUAGE ENGLISH FRENCH GERMAN ITALIAN SPANISH PRINTING PAGE SIZE 4 LT CTM ORIENTATION MANUAL FEED OFF ON TONER SAVER OFF ON RESOLUTION 600 300 AUTO CONT OFF ON STANDBY ENABLE DISABLE INTERFACE AUTO PARALLEL SERIAL LT AUX RYH HR HR DR RE RE RTE AJT OJ WO WI WI WW WO Aa oaJ aJ Aaja oJ ms Ms MI aja RR oO Ml OINI Aa als With option EPL 5500 Service Manual General Description 1 4 4 Displav of Messages This printer indicates three tvpes of messages with the LED lights or status sheet status messages error mess
9. 5 13 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 2 SELF DIAGNOSTIC FUNCTION This section describes the self diagnostic function in which the controller automatically checks the operating conditions of each component If any abnormality is detected the printer prints an error message on the status sheet or displays a message with the LED lights 5 2 1 SOFT ERROR When the printer detects an error relating to a software operation the printer indicates it as SOFT ERROR by slowly flashing the red LED light By pressing the button on the control panel the printer prints the status sheet with error information Table 5 1 lists the soft error codes Table 5 1 SOFT ERROR Code List Error Code Error Condition 0001 CPU error reserved C0002 CPU error programming command error C0003 CPU error illegal instruction C0004 CPU error unsupported FPU instruction C0007 CPU error address misalignment C0009 CPU error reserved CO010 CPU error tag overflow C0017 to 31 CPU error unsupported interrupt C0036 CPU error unsupported coprocessor instruction C0128 to 254 CPU error unim
10. A 10 Table A 13 CN210 Pin A 10 Table A 14 CN211 Pin A 10 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 LocalTalk Serial module or Type B EX ROM SIMM CN5 Figure A 1 Connections for the Video Controller Rev A A 1 Appendix EPL 5500 Service Manual Fa Image transfer housing EH Image transfer charger C169 MAIN B Main motor CN206 1 2 3 4 Polygon motor CN210 1 5 2 4 3 3 4 2 IN Z 1 Fan motor CN21 Board POLYGON CTL DC5V GND DC24V N C Paper Exit sensor CN3S 3 2 ANODE PC1 GND 1 Paper Take up sensor PC3 ANODE PC1 GND 1 DC24V CNIS CN203 2 2 1 3 4 5 Paper Take up 6 solenoid LI CN2S 1 2 SLI ab Fusing roller Thermistor n 3 1 CN202 CN204 PWB F FEED1 CN205 CN
11. 3 22 Figure 3 35 Removing the Paper Take Up 3 22 List of Tables TOO Si Sees S e EOS RIDE Mini eru raids queda 3 1 Table 3 2 Screw Types and lt 3 2 Table 3 3 Checks after Repair 3 3 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 WAR NING O Disconnect the power cord before disassembling assembling the printer 1 Be sure to handle the fusing unit carefully because the unit remains hot for a while after the printer stops printing If it is necessary to plug in the power cord and operate the printer after disassembling it please be careful of the following 1 Keep your hands and clothing well away from operating or rotating parts such as rollers fan motors etc 2 Never touch electric terminals or high voltage components such as the charger and the high voltage unit CAUTION O 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 O Do not disassemble the optical unit O Never turn power on if the opt
12. 2 9 22223 FUSER Controls 0 6 wie ta A Ag Rott ate ha ri SS 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 Motor Cone 2 coe re 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 Operation 2 16 Reset PP Marr 2 19 2 2 1 2 BIS GODTTOLGITOUIE dg feta Mod eee 2 19 2 2 1 3 Interrupt 2 20 2 2 1 4 DRAM Management 2 20 2 2 1 5 Parallel Interface 2 21 2 2 1 6 Video Interface sil a 2 22 List of Figures Figure 2 1 Main 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 2 4 Figure 2 5 Drum 2 4 Figure 2 6 Laser Exposure 252 ee a AL woh PA 2 5 Figure 2 7 Development cocos Sed RI E Ii 2 5 Figure 2 8 Image lt
13. Figure 5 PWB E 120 V Rev 14 Appendix EPL 5500 Service Manual avs aNno Ast Aver IWVTHISN4 1 aney 199 n vin 36 MeL NL zu 5 198 043 FEM s997 L ve 9 702 961 ly A nd 59 298 d sl Ion us vero ge 1 AOL 9a N L p T T M A962 001 190 p Fr bar 4 esu ieu 00 Ho af vz 410022 54 m 06 VE 4 Qa hos oy 599 an Fo ae 2 02 T f p ooz zu 998 4noozz ea MANN anseo 0 Mose HA o S3d 3HIM AOL 9 9 010 31V3H A 790 l mz 9 4 9H dud 98010 l t ZZ 00 291 VOL A002 AOL 10 DIN 1509 20142 440022 Z0LWO As TAG l 34001 91 vs TINI MEL ve vi wore AML 0 H snooze 008 10 69 ASE vy 290 3000 9001 02v v A0t9 gt PE l 2 l 89 su 2 L 4
14. ie a 6 2 6 1 2 1 Periodic Service 6 2 Cleanings c ooo A ole eka B eal Spee 6 2 List of Figures Figure 6 1 Position of the Special 6 1 Figure 6 2 Cleaning the Electrode Comb 6 1 List of Tables Table 6 1 Periodic Service 6 2 Table 6 2 Cleaning Parts and Procedures 6 2 Rev A 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 kev components in the electrophotographic process are integrated into two expendable units the photoconductor unit and toner cartridge Therefore periodic replacement of them is essential to ensure high quality output Other maintenance items are also described in this chapter which is divided into two sections user maintenance preventive maintenance and service maintenance repair 6 1 1 User Maintenance Users can achieve maximum print quality from the printer by following the procedures below 6 1 1 1 Cleaning This section describes the cleaning required for optimal print quality O External Cleaning Be sure to disconnect the printer from the power outlet before cleaning it Wipe the cover and external parts of the printer with a da
15. D39X PS GL2 AUTO AUX ESCP2 D39X PS GL2 AUTO AUTO CONT 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 SPEED FAST LOW BI D WORD LENGTH ON OFF 8 7 BAUD RATE 9600 19200 38400 57600 300 600 1200 2400 4800 PARITY NONE EVEN ODD STOP BIT 1 2 DTR ON OFF ON OFF STATUS 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 service modes O Hexadecimal dump mode Q EEPROM format mode Factory reset mode Q 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 Service Mode Select Timing LED Pattern Yellow Pattern 0 0 NA Pattern 0 1 NA Pattern 1 Hexadecimal dump mode Pattern 2 EEPROM Initialize mode Pattern 3 Factory reset mode Pattern 4 Default setting mode 1 1 Can be performed by the user 1 4 3 1 Hexadecimal Dump Mode Hexadecimal dump mode is a useful tool in
16. lt 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 6 Applicabie si i E ELE 1 6 1 2 7 Specifications for Consumable 1 6 1 2 8 Physical 5 lt 1 6 1 2 9 Software Specifications peu 1 7 1 3 INTERFACE SPECIFICATIONS 1 9 1 3 1 Parallel 1 9 1 3 1 4 Compatibility Mode of Parallel Interface 1 9 1 3 1 2 Reverse ModeMode Signal 0 1 11 1 3 2 Senal nterface A uhr cuire EIS d we PEE 1 15 1 3 3 Optional LocalTalk 1 17 1 4 OPERATING INSTRUCTIONS 1 18 1 4 1 Control Panele iest e i 8 eet A ub pube E P Rote ee 1 18 142 Printer Settings Functions 1 20 1 4 3 Service 1 23 1 4 3 1 Dump 1 23 1 4 3 2 EEPROM Initialize 1 23 1 4 3 3 Factory Reset Mode 1 23 1 4 3 4 Default Setting 1 24
17. Figure 3 26 Removing the G Rings CAUTION When reinstalling the G rings O 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 B 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 y T le Screw 4 Motor bracket i Main motor Figure 3 31 Removing the Main Motor 3 20 Rev B 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 Turnover the printer on its back 3 Remove the 4 screws 6 and remove the ground plate 4 Turn up the lifting plate
18. Heater Lamp CAUTION Do not touch the glass surface of the lamp with vour 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 Wags 2 gt lt Figure 3 21 Removing the Heater Lamp ASSEMBLV POINTS When reinstalling the lamp position its voltage indication to the left side non gear end Rev B 3 15 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 B 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 B 3 17 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
19. Paper Take Up When SL1 is de energized Roller PC Drum Depression Pre Image Transfer Roller Paper Lift Up Plate Fixed Separating Pad Transport Roller Paper Take Paper Take Up Sensor PC1 Up Clutch Paper Take Up Solenoid SL1 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 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 trav in the printer this unit uses a corner separation svstem as its paper separating function The paper take up solenoid in the lower cassette is controlled bv 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 recognize that B5 size paper will be fed On the other hand when the paper regulation plate is set to the 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 Take Up Roll Paper Regulation sper Take dp Roller Paper Take Up Clutch d 7 Paper Take Up Solenoid Transport Roller Corner Separation Plate Figure
20. The following units need service maintenance periodically because they are subject to functional deterioration as the total number of printed pages increases resulting in bad print quality Table 6 1 Periodic Service Maintenance mage transfer unit Approx 50 000 pages using unit Approx 50 000 pages The service interval listed above is only a reference value You do not need to perform service maintenance exactly at this time 6 1 2 2 Cleaning Some parts of this printer require regular cleaning Clean each part using the specified method and tools Refer to Chapter 3 for disassembly procedures Table 6 2 Cleaning Parts and Procedures Parts Name Cleaning Procedure aper take up roller Wipe the surface with a dry soft cloth pper fusing roller in fusing unit Dip a soft cloth in silicon oil and wipe the dust off ower fusing roller in fusing unit hermistor in fusing unit Dip a soft cloth in denatured alcohol and wipe the dust off aper separator and rollers in fusing unit 6 2 Rev B EPL 5500 Service Manual Maintenance Rev B 6 3 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 1 Cable Connections for the Video Controller A 1 Figure A 2 Cable Connectio
21. 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 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 MB86933H SPARKIlite 22 5 MHz 32 bit bus RISC CPU the standard cells developed for this printer DRAMs ROM and an EEPROM Rev B EEPROM ROM8 IC11 IC12 ADDRESS DATA 05 91 IC 2 CONTROL E05A92 IC3 E05A93 IC4 O DATA ADDRESS RS 232C Specific I F LocalTalk Video Parallel Figure 2 26 C169 MAIN B Board Block Diagram 2 17 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 RISC Location Function CPU which operates at 22 5 MHz manages the video controller operation This ASIC contains the following functions Address decoding e DRAM management refresh control RAS CAS control This ASIC contains the following functions Video signal processing Toner save function BiRITech EMGTech This ASIC contain
22. 1 4 1 Control Panel The printer control panel gives vou easv control over most common printer operations The panel consists of indicator lights and a button LED Vellow LED Red 3 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 cover open Fast flashing Feed jam paper empty Slow flashing One of these errors SOFT ERROR PRINT OVERRUN MEMORY OVERFLOW CHECK PAPER SIZE IMAGE OPTIMUM OFF No error condition ev EPL 5500 Service Manual General Description Functions of Pressing the Button O While the Red light flashes slowly Function of button Clears an error Operation 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 U 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 paper or clear the jam and then hold down the button until the yellow and Red lights go on then release to continue printing U While yellow light is flashing slowly except in EPSONScript mode Function of button Prints out data in the printer s memory Operation Ho
23. CN2 Connector for RAM SIMM Table A 2 CN3 Not used CN4 Connector for LocalTalk Serial I F Module or Type B EX Table A 3 CN5 Connector for ROM SIMM Table A 4 CN6 Not used CN7 Not used CN202 Connector for thermistor Table A 5 CN203 Connector for paper take up solenoid and paper take up sensor Table A 6 CN204 Connector for high voltage supply board PWB S and PWB F board Table A 7 CN205 Connector for optical unit Table A 8 CN206 Connector for motor Table A 9 CN207 Connector for power supply board PWB E board Table A 10 CN208 Connector for paper exit sensor Table A 11 CN209 Connector for lower paper cassette Table A 12 CN210 Connector for optical unit Table A 13 CN211 Connector for fan Table A 14 ower Supply Board PWB E Board Connector for AC power inlet CN2 Connector for main board Table A 11 CN3 Connector for heater lamp igh Voltage Supply Board PWB F Board Connector for main board Table A 7 CN2 Rev A Connector for paper take up sensor A 3 Appendix EPL 5500 Service Manual A 1 1 Main Board C169 MAIN B Board Table A 2 CN2 Pin Assignments Signal Name Description Data bus bit 0 Data bus bit 16 Data bus bit 1 Data bus bit 17 Data bus bit 2 Data bus bit 18 Data bus bit 3
24. 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 circuit Laser diode emission is controlled bv three signals LDATA LDAPC1 and LDAPC2 from the main board C169 MAIN B Laser Diode SSCAN LD CTL LDAPC1 SOS Mirror LDAPC2 L DATA A SOS Sensor Main Board C169 MAIN B Figure 2 17 Laser Diode Drive Circuit The LDATA signal is the laser on off signal When it is LOW the laser emits and when it is HIGH the laser stops emitting LDATA is the combination of the two signals in the figure below If the VIDEO or the FORCED LASER DIODE ON signal is activated LOW the LDATA signal will be active The VIDEO signal is an image signal sent from the video controller circuit The FORCED LASER DIODE ON signal is a laser emission signal to apply the laser beam to the SOS sensor Forced Laser Diode ON 25 A gt gt gt ji _220 L DATA VIDEO E f
25. Screw 6 Ground plate Figure 3 32 Removing the Ground Plate ASSEMBLY POINT 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 Paper guide ASSY Figure 3 33 Removing the Paper Guide ASSY Rev B 3 21 Disassembiv and Assemblv EPL 5500 Service Manual 3 2 3 10 Paper Take Up Roller Removal Remove the main motor Refer to Section 3 2 3 8 Remove the paper guide assembiv Refer to Section 3 2 3 9 Remove the 6 screws 4 2 5 4 and remove the left frame Remove the 2 gears GEAR 29 65T GEAR 22 57T specified in the figure below PN Duce Remove Gears 2 Paper Take up Roller Shaft Slide out Figure 3 34 Removing the Gears 5 Atthe 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 ASSEMBLY POINT When removing the paper take up roller from the shaft be sure not to lose the pin Paper Take up Roller E Ring E Paper Take up Roller Shaft Figure 3 35 Removing the Paper Ta
26. AIN B Board may be bad Table 5 23 C1170 Error Checkpoint Is operation OK after you replace the ROM2 Finding Replace the C169 MAIN B Board Solution Replace the ROM IC11 on the C169 MAIN Board he C169 MAIN B Board may be bad he ROM SIMM may be bad Checkpoint Is operation OK after you replace the ROM SIMM Replace the C169 MAIN B Board Solution Replace the ROM SIMM he C169 MAIN B Board may be bad Table 5 25 C1300 or C1310 Error he optional interface card Type B may be bad Checkpoint Finding Replace the C169 MAIN B Board Solution Replace the optional interface card or Type EX box he C169 MAIN B Board may be bad Rev B Replace the C169 MAIN B Board 5 15 Troubleshooting EPL 5500 Service Manual Table 5 26 C1320 Error Checkpoint Finding Solution Replace the optional interface card he C169 MAIN B Board mav Replace the C169 be bad MAIN B Board Table 5 27 C1990 Error Cause am xS Checkpoint Finding he C169 MAIN B Board ma Replace the C169 be bad MAIN B Board 5 16 Rev B EPL 5500 Service Manual Troubleshooting 5 4 2 Print Qualitv Anomalies This section describes how to isolate possible causes of a print qualitv problem Table 5 28 Print Qualitv Anomalies Svmptom Possible Cause Part Name Check Item ow image density Poor developmen
27. EPSON Job Language This is EPSON s original language svstem It is used to skip among various destinations as shown in Figure l 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 switching Neither EJL nor PJL switches the mode directly They first exit the current mode and return to EJL or PJL Then they enter another mode 1 4 6 2 Intelligent Emulation Switch 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 ESC P 2 EPSONScript 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 print data ev General Description EPL 5500 Service Manual The main improvement of this technique is in eliminating jaggies in diagonal lines It is most effective
28. us 66LWL 01 19 VOL Hn us UU 1508 ML 129 ml z gt Ness e INO ISA 97 pe da nosz ZSA AZL a 125 ML 694 5 D N 1919 ZNO it Diagram Figure 6 PWB E 220 240 V 15 Rev Appendix EPL 5500 Service Manual A 3 CIRCUIT BOARD COMPONENT LAYOUT SIJI 1 CI69 18 l 95 aul C20 tall zi ic i Figure A 7 C169 MAIN B Component Lavout Front A 16 Rev A EPL 5500 Service Manual Appendix a2 a L soei TIIT m 6 SUL 322 D i 3 aL all y UE 37 Sy 502 ae J foe SHE i S Ug 8 g U mm if i Pa 8 8 4 3 80 ir 3 88 2 ir 85 UD am 5 S 4 3 png ERS n aL ET las Us z 8 8 81 at BID 774 ID isti LH 7 T Figure A 8 C169 MAIN B Component Lavout Rev A A 17 EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA INC 20770 Madrona Avenue P O Box 2842 Torrance CA 90509 2842 Phone 800 922 8911 Fax 310 782 5220 EPSON DEUTCHLAND GmBH Z lipicher StraBe 6 40549 D sseldorf Germany Phone 0211 56030 Fax 0211 504 7787 EPSON UK LTD Campus 100 Maylands Avenue Hemel Hempstead Herts HP2 7TJ U K Phone 1442 61144 Fax 1442 22
29. 1 4 4 Display of Messages 1 27 1 4 4 1 Status lt 1 27 1 4 4 2 Error lt 1 27 1 4 4 3 Service Call Error 55 1 27 1 4 5 Printer Sharing canes oe ea ee wie bin al 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 1 29 1 4 6 1 Emulation Switch by 5 1 29 1 4 6 2 Intelligent Emulation 1 29 1 4 7 Bi Resolution Improvement Technology 1 30 1 4 8 Toner Save 1 31 1 4 9 Optional Memory 1 31 1 5 MAIN COMPONENTS 1 32 1 5 1 C169 MAIN B 1 33 neta sd ou dad eui Mal M eire M d 1 34 1 59 PWEBSE bmod 1 34 pea a sci has cn BD e erat 1 35 1 5 FUSING ENIT re bt ese dt a 1 35 1 5 6 Photoconductor 1 36 1 5 7 Developing
30. 2 4 Paper Feeding from the Lower Paper Cassette 2 1 1 2 Drum Charge The PC drum is charged with static electricitv before laser exposure The rotating charge brush and pre film are used as the charging method Less ozone is generated bv 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 Drum Charging PWB F l and Pre film Bias Rotating Charge a HT Brush S PC Drum Protecting Shutter Protecting Shutter iy Charged Surface approx 800 V D 2 gt Pre film 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 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 Laser Exposed Surface Approx 50 V Laser Diode Figure 2 6 Laser Exposure 2 1 1 4 Development Toner is applied to the invisible static image on the PC drum and a toner image is created on the surface When the PC drum starts to rotate when the main motor is activated the PC drum su
31. Assembly 3 2 3 3 Upper Unit Removal Open the upper unit Remove the right cover and left cover Refer to Section 3 2 1 1 Disconnect connectors CN202 CN208 and CN211 from the C169 MAIN B Remove harness covers A and B and pull out the CN1 of the PWB E board 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 Upper Unit Rev B 3 9 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 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 Disassembiv and Assemblv EPL 5500 Service Manual 3 2 3 6 Fusing Unit Removal Open the top cover Refer to Section 3 2 3 3 Remo
32. Data bus bit 19 5 VDC Not connected Memory address bit 0 Memory address bit 1 Memory address bit 2 Memory address bit 3 Memory address bit 4 Memory address bit 5 Memory address bit 6 Memory address bit 10 Data bus bit 4 Data bus bit 20 Data bus bit 5 Data bus bit 21 Data bus bit 6 Data bus bit 22 Data bus bit 7 Data bus bit 23 Memory address bit 7 Not connected 5 VDC Memory address bit 8 Memory address bit 9 RAS 3 RAS 2 Not used Not used Not used Not used Ground CAS 0 CAS 2 CAS 3 CAS 1 RAS 0 RAS 1 Not connected Write enable Not connected Data bus bit 8 51 4 Rev A EPL 5500 Service Manual Rev A Table A 2 CN2 Pin Assignments Continued Pin No Signal Signal Name Description Data bus bit 24 Data bus bit 9 Data bus bit 25 Data bus bit 10 Data bus bit 26 Data bus bit 11 Data bus bit 27 Data bus bit 12 Data bus bit 28 5 VDC Data bus bit 29 Data bus bit 13 Data bus bit 30 Data bus bit 14 Data bus bit 31 Data bus bit 14 Not connected Not used Not used Not used Not used Not connected Ground Reset signal Ground Ground Ground Ground Data bus bit 0 Data bus bit 1 Data bus bit 2 Data bus bit 3 Data bus bit 4 Data bus bit 5 Data bus bit 6 Data bus bit 7 Address bus bit 0 Address
33. EPL 5500 Service Manual 5 3 TROUBLESHOOTING This section describes troubleshooting abnormal operations and print qualitv 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 tvpes of malfunctions Each paragraph refers vou to a detailed troubleshooting table Table 5 4 Symptoms and Reference Tables m Reference Symptom Printer Condition Table he printer does not operate at all The heater lamp in fusing unit does not come on and so neither LED light is on ellow and LED lights do not comeThe heater lamp in the fusing unit comes on but the LED lights are not on The LED light goes on after power on LED light goes on when printing starts LED light is on when printing starts from the lower paper cassette Paper jam oftware error The printer indicates a software error on the status sheet Fusing unit error A fusing unit error is displayed Fan motor error A fan motor error is displayed canner motor error A scanner motor error is displayed Laser light error A laser light error is displayed ommunication error for engine A communication error is displayed EEPROM write error An EEPROM write error is displayed Engine initialize error An engine initialize error is displayed Error code C1000 or C1001 A C1000 or C1001 is disp
34. ON Bit Image Dark Light BarCode Zero Char 0 0 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 PeMultilin PcPortuguese PcCanFrenc PcNordic PcTurk2 Pc E Europe BpBRASCII BpAbicomp Country USA France Germany UK Denmak Sweden Italy Spainl Japan Norway Denmark2 Spain2 LatinAmerica Auto CR ON OFF Auto LF OFF ON Bit Image Dark Light BarCode Zero Char 0 With option Font Courier Prestige Gothic Orator Script Presentor Pitch 10 CPI 12 CPI 15 CPI 17 CPI 20 CPI 24 CPI Prop 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 0 0 Rev B 1 21 General Description EPL 5500 Service Manual Table 1 12 Printer Settings Continued PAGE PROTECT Available Options AUTO ON RESOLUTION 600 300 IMAGE OPTIMUM AUTO OFF ON TIMEOUT 5 to 300 EMULATION PARALLEL ESCP2 I239X GL2 AUTO SERIAL ESCP2 I239X PS GL2 AUTO L T ESCP2
35. Replace the PWB F board Poor development Toner cartridge Replace the cartridge PWB F board Replace board Improper print Adjust the print density density setting n SelecType Defective opticalOptical unit Replace the optical unit unit hite black lines andlmproper charging Photoconduc Replace the imaging bands tor unit cartridge Poor development PWB F board Replace the board Toner cartridge Replace toner cartridge Dirt on the fusingFusing roller Clean the fusing roller roller 5 18 Rev B EPL 5500 Service Manual Troubleshooting Table 5 28 Print Qualitv Anomalies Continued Svmptom Possible Cause Part Name Check Item oner smudges onimproper charging PWB F Replace the he back side of the board Poor development PWB F Replace the PWB F board Improper fusing Fusing unit Replace the fusing unit Offset print Improper fusing Fusing unit Replace the fusing unit Poor imagelmage _ transfer Replace transfer unit transfer unit PWB F Replace the board Rev B 5 19 Chapter6 Maintenance Table of Contents 6 1 MAINTENANCE 6 1 6 1 1 User Maintenance 6 1 QISA MMA Ses ioo ag Ba ais 6 1 6 1 1 2 Replacement of Consumables 6 2 Service facie io we a Mae ete fence ta
36. Transfer Roller Electrode Comb PWB F 1 201 Housing CN204 1 1 1 gt Pre Image Transfer CNIF Roller C169 MAIN B B Housing Ground Image Transfer Bias Figure 2 8 Image Transfer 2 1 1 6 Fusing The toner image transferred onto the paper is fixed securelv using a heat roller svstem as the fusing svstem The upper fusing roller which is heated bv the heater lamp fuses the toner image which is securelv fixed bv the pressure between the upper and lower fusing rollers Thermistor TH1 detects and controls the temperature of the upper fusing roller Thermal fuse TF1 blows when the temperature exceeds 200 C shutting down power to the heater lamp Thermal Fuse Thermistor Upper Fusing Lower Fusing Roller Roller Heater Lamp Figure 2 9 Fusing 2 6 Rev B EPL 5500 Service Manual Operating Principles 2 1 2 Engine Control This section describes engine control the power supplv board and the high voltage supplv board The engine is controlled bv 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 Heater Lamp Interlock Switch Fan Motor M2 Exit Sensor PC3 Paper Take up Sensor PC1 Paper Take up Solenoid SL1 Fusing Roller Thermistor TH1 Image Transfer
37. after Repair Check the repaired unit using the following list on completion of servicing Table 3 3 Checks after Repair Location Checkpoint Operation Control panel Do all LEDs and button function normally Heater lamp Does the heater lamp turn on normally Test print Is the test print performed normally status sheet Data print Does data print in all modes Adjustment Print position Is the gap between the top edge of the paper and the horizontal line in the status sheet print exactly 29 6 mm 1 17 inch ROM version Is it the latest version Is toner and dust removed from the paper path Is the paper take up roller cleaned Is the roller in the fusing unit cleaned Is the outer surface of the printer clean Is the consumable removed from the printer Is the unit packed securely Are accessories packed also Rev B 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 Push the upper unit lock release button and open the upper un
38. between received character codes Always ignored SIGNAL GND Ground ITTX TXD Current loop signal HIGH impedance SPACE between pin 17 and 24 or X ON signal sent across pins 17 and 24 indicate that the printer is ready to accept data LOW impedance MARK or X OFF signal being sent indicates that the printer i 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 printe power is on When the SelecType setting is used for DT control DTR goes LOW in case of any error conditions The data RXD from host computer must be stopped within 128 characters after DTR goes LOW ITTX RXD Return Current loop signal Current return for pin 17 ITTX TXD Return Current loop signal Input data current loop ITTX RXD Current loop signal Current return for pin 25 Note The DTR state can be selected through printer settings ev General Description EPL 5500 Service Manual Handshaking When the vacant area for data in the input buffer drops to 256 bvtes 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 a
39. ved 40001 40001 Tin L d 6220 vwo 9000 sent 159 sid oezo 3 1 isa 022 ty agi A dis l 5 Z ia aro TOND B 100 m m Ly aooot aooor 40000 m a zano GNO ON Sezo 1820 sizu ast l aL AE wa l 9 0L Lol d T LAG a ES 9 S0ZNO HYVIN nro OND 4 ino j 99 m 114 mt sNviood uoa 5 ista 5 i 13630 1vaosa z ET al bi KA En in 21 99 200HvL 50240 xawo axuirrd wa EN 9 f xsis ss jua Eu pe nous prnosiera ZNIS 0Ld ied egeo oza zinosnid XASBLO 2 onera assa 32 zed _ cosa 28 28 Sanioca S ec 19 sr 255 M ow e a zee 2 2 ircuit Diagram Figure A 4 C169 MAIN B C A 13 Rev A EPL 5500 Service Manual Appendix
40. 2 6 Applicable Standards Safetv Standards 120 VAC model UL 1950 CSA 22 2 No 950 Deviation 3 220 240 VAC model EN 60950 IEC950 NEMKO IEC950 SETI IEC950 SEMKO IEC950 DEMKO IEC 950 Safety Regulations Laser Radiation 120 VAC model FDA NCDRH Class 1 220 240 VAC model VDE 0837 Laser Class 1 IEC825 SETI IEC825 SEMKO 1 825 DEMKO IEC825 EMI 120 VAC model FCC Part 15 Subpart B Class B DOC Class B 220 240 VAC model Vig 243 VDE 0878 Part 3 30 EN55022 Class B CISPR Pub 22 Class B CE marking EMC Others Toner No effect on human health OSHA TSCA EINECS OPC No effect on human health Ozone Less than 0 01 mmp other UL478 5th edition Materials SWISS environmental law must contain no CdS 1 2 7 Specifications for Consumables Life Developer and toner cartridge 3 000 pages Photoconductor unit 20 000 pages Note In continuous printing mode with A4 letter paper at a 5 image ratio black white ratio The life varies depending on the printing mode continuous or intermittent and or the image ratio Environmental Conditions for Storage and Transportation Temperature 0 to 35 C 32 to 95 F Humidity 30 to 85 RH Drop test Height 76 cm 30 4 inches Vibration Same as printer Resistance to atmospheric pressure More than 74 Kpa Storage term 18 months following date of manufacture 1 2 8 Physical Specifications Dimensions Width x Depth x Height Printer 352 x 26
41. 30360 Amphenol or equivalent Signal description See Table 1 9 Table 1 9 Parallel Interface Pin Assignment Pin No signal Name IHostClk This signal is a strobe pulse used to read extensio request values from the host computer during negotiation These signals are data bits of extension request values received during negotiation This printer supports following values 0000 0100 Request Device ID sent in nibble mode 0000 0000 Request nibble mode PtrCIk Printer sends clock data PtrBusy Printer sends data bits 3 and 7 during data transfer to host computer AckDataReq Printer sends data bits 2 and 6 during data transfer to host computer SLCT Xflag Printer sends data bits 2 and 6 during data transfer to host computer AUTO FEED HostBusy This signal informs the printer of the host computer state When the signal is HIGH the host computer cannoti accept data NC Not used GND Logic ground level CHASSIS GND Connected to the printer chassis The printer chassis GND and the signal GND are connected to each other NC Not connected Ground level for the twisted pair return signal Fixed at HIGH level nDataAvail Printer sending data bits 0 and 4 during data transfer to host computer Same as for pins 19 to 30 Not used Pulled up to 5 V through 1 0K ohm resistance 1284Active If this signal is set to HIGH this printer is activel in
42. 4 x 299 mm 13 9 x 10 4 x 11 8 inches Weight Approx 5 kg 11 Ib with consumables excluding all options Rev B 1 7 EPL 5500 Service Manual 1 2 9 Software Specifications Built in modes HP Laserjet 4 emulation PCL 5e EPSON GL 2 mode GL like mode General Description 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 INot available Initial mode Paper eject Supports PG AF commands Supported in PCL Auto eject SelecType setting INot available Reduced printing SelecType setting Available in PCL Switch to PCL Not supported ESC Supported Reset ESC E Ejects paper and then initializes jects paper switches to PCL and then initializes PJL EJL and ES Supported Supported Advance full page Supported Not supported Note 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 plotter 7475A etc commands If the application software us
43. 5 Lower paper cassette S050005 Developer cartridge Developer and toner cartridge S051029 Photoconductor unit C82334 ocalTalk with serial I F module see Note 3 C8361 4 nterface cable RS 232C extension cable for 82334 82335 box I F card box see Note 4 C82307 4 82308 32 serial interface card see Note 5 C8231 0 C8231 1 B2 KB parallel interface card see Note 5 C8231 2 see Note 5 82313 see Note 5 C8231 4 OAX interface card see Note 5 82315 WINAX interface card see Note 5 82324 thernet interface card for NetWare see Note 5 82328 see Note 5 C82331 Notes ulti protocol Ethernet card see Note 5 1 Requires added memory RAM over a total of 2 MB including standard RAM woh 1 2 NLSP font ROMs do not support ESC P 2 and FX modes LocalTalk with serial I F module C82334 k cannot be used with Type B EX box 82335 EX box 682335 cannot be used with LocalTalk with serial I F module 82334 EX box 82335 must be installed while using the Type B I F card Rev B EPL 5500 Service Manual 1 2 SPECIFICATIONS This section provides statistical data for the EPL 5500 1 2 1 Basic Specifications Printing method Resolution 600 300 dpi Printing s
44. 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 2 Auto Sense Mode EPSONScript mode LHP mode ESC P2 mode EPSONScript mode Figure 1 10 Port Fixed Mode Mode Assignment Switched by printer settings Input buffer Memory Mode Assignment Serial or AUX It is possible to allocate each mode to parallel serial L T and AUX The entire memorv will be allocated to the channels that are used The interface that receives the data first will print first HP mode ESC P2 mode K EPSONScript mode Mode Assignment Auto Sense mode ESC P2 mode N EPSONScript mode Mode Assignment Serial or L T or AUX Figure 1 11 Auto Sense Mode ev 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 bv SPL The two tvpes of emulation switch function described below are available on this printer Together thev are referred to as SPL Shared Printer Language EJL
45. 6 Fusing Unit 3 12 3 2 3 7 Fusing Unit 3 15 3 2 3 8 Main Motor 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 3 22 List of Figures Figure 3 1 Removing the 3 4 Figure 3 2 Removing the Shield 5 3 5 Figure 3 3 Removing the C169 MAIN B 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 3 8 Figure 3 8 Reinstalling the Electrode Comb 3 8 Figure 3 9 Removing the Harness 3 9 Figure 3 10 Removing the Upper 3 9 Figure 3 11 Removing the PWB F 3 10 Figure 3 12 Removing the 3 10 Figure 3 13 Removing the PWB E Cover 3 11 Figure 3 14 Removing the 3 11 Figure 3 15 Gear and Spring
46. 72 R50 33K VEE NE ese CAN aias 08 NS 14 10K 10K 10K DRA er SES IL BIR Ne eH ERE Ag gig Das RED en EE 59 a pem DR6 RBI 68 06 Re AG OES DR7 REZ 68 DT R Se DR8 R83 68 08 A12 voo Ta mm TA DRS RM 68 DS BE 7 SM vep me MI nempe 18 2 A16 32 1 22 716 2 3 16 16 DRIO 885 68 DIO BWES DRIG RAS Soo ORE Es DRM 68 D11 D NOT USE C52 IN 161 16 N C RIS RET 22 gau BJNE Ra 68 bi g Ls NOT USE 2122 PIN IN AM 4 ei i _ 2 Rer S oo 12 m ie DRI3 R88 68 013 AQ DRIA 68 DRIS R90 68 015 DRI6 R91 68 016 DRI7 R92 68 D17 0818 R93 68 D18 DRIS R94 68 D19 DR20 R95 68 020 Bi 299099999909909 155 Ag O5 DR21 s m EX DR22 RS 68 022 4 DR23 RGB 68 023 DR24 R9 68 024 DR25 R100 68 025 DR26 R101 68 026 DR27 R102 68 027 DR28 R103 68 028 DR29 R104 68 029 DR30 R105 68 030 DR31 R106 68 D31 J28 29 30 31 32 CUT LAND PATTERN CUT THE FOLLOWS LINES IN MP BOARD 128 716 PIN 49 mr is Beh eles B C de 5889 ROM Figure A 3 169 MAIN B Circuit Diagram 1 2 Rev A A 11 Appendix EPL 5500 Service Manual
47. 7227 EPSON FRANCE S A 68 bis rue Marjolin 92300 Levallois Perret France Phone 02 262331 Fax 02 2440750 EPSON IBERICA Avda de Roma 18 26 08290 Cerdanyola del Valles Barcelona Spain Phone 582 15 00 Fax 582 15 55 EPSON ITALIA S p A V le F lli Casiraghi 427 20099 Sesto S Giovanni MI Italy Phone 02 262331 Fax 02 2440750 EPSON AUSTRALIA PTY LTD 1 70 Gibbes Street Chatswood 2067 NSW Australia Phone 02 415 9000 Fax 02 417 0077 EPSON SINGAPORE PTE LTD No 1 Raffles Place 26 00 OUB Centre Singapore 0104 Phone 5330477 Fax 5338119 EPSON HONG KONG LTD 20 F Harbour Centre 25 Harbour Road Wanchai Hong Kong Phone 585 4600 Fax 827 4346 EPSON TAIWAN TECHNOLOGY amp TRADING LTD 10F No 287 Nonking E Road Sec 3 Taipei Taiwan R O C Phone 2 717 7360 Fax 2 712 9164 SEIKO PRINTER 80 Harashinden Hirooka Shiojiri shi Nagano ken 399 07 JAPAN Phone 0263 52 2552 Fax 0263 54 4007 Telex 3342 214 SEPSON J As of October 1995 EPSON
48. 9 PWB E BOASIU EIUS RE TUS xt E RE 1 34 Figure 1 20 PWB FE Board 1 34 Figure 1 21 Optical 1 35 Figure l 22 FUSING Uni isse eee bb sia A et a ie ERES 1 35 Figure 1 23 Photoconductor 1 36 Figure 1 24 Developing Cartridge 1 36 List of Tables Table 1 1 Options for the 5500 1 2 Table 1 2 Paper Feed 1 3 Table t 3 Paper oso Suet E US BG bue RS tees is 1 3 Table 1 4 Usability of Special Papers 1 4 Table 1 5 Electrical 1 5 Table 1 6 Differences between EPSON GL 2 and GL 2 in the HP LaserJet 4 zr xc B SR AS 1 7 Table 1 7 B llEin 2 ke REESE at 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 sp vi iN E ERR eda a 1 20 Table 1 13 Service MOde Select Timing 1 23 Table 1 14
49. BUSV Peripheral Busv Status PE SLCT Note 1 ERROR gt lt Reverse Idle Interrupt HB DA Transfer Figure 1 8 Timing Chart for Interrupts Note signal is set to HIGH if the extension request value was 04h 1 14 Rev B EPL 5500 Service Manual General Description 1 3 2 Serial Interface This printer can use the optional LocalTalk serial interface module Tvpe RS 232C current loop Transfer svstem Full duplex Svnchronization Asvnchronous start stop svstem 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 combined with DTR control DTR control can be combined 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 Parity error Replaced by Framing error Replaced by Breaking character Ignored Signal description See Table 1 10 Table 1 10 Serial Interface Pin Assignments Pin No signal Name CHASSIS GND Connected to the printer chassis The printer chassis GND and signal GND are connected to each other Serial ASCII data output by the printer It maintains the MARK state LOW level between transmitted characte codes Logic 0 is at HIGH level SPACE and logic 1 is at LO level MARK Serial ASCII data input to the printer It maintains MARK state LOW level
50. Default Settings Codes 1 24 Table 1 15 Error Messages i ou oor ERE ate eoe Re 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 technologv This printer is small and light and features high speed high resolution printing Maintenance is verv easv as a result of various built in diagnostic functions The main features are Noozone Q Printing speed 6 ppm pages per minute 9 Resolution 600 300 dpi dots per inch Light weight about 5 kg 11 Ib 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 22 5 MHz SPARKIite MB86933H Q 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 supported Optional EPSONScript Level 2 PostScript compatible module Q Optional WPS Windows Printing System ROM SIMM module 1 Optional 1239X ESC P 2 and FX emulation ROM SIMM module EPSON Micro Gray Technology
51. E L 6 ZNO aiaa tape y wa XOT DNE m 1 em L xa L ano 1 Eu n L T Xs pss 54 do z 585 oot 5 AL 0001 a ar 20 T Ls LIT oe m wm kal ezo d wit ce sozu X sgo vi wes b 2 44 a Fw veooznin 57 49 vi A m raced H aw aor 1 5 es oases vn HE nio vero Me ig Me voza x 14 26 e MOL LHLNO SSA De fa cake 2 90 ar a zune a su 90 sou T e T 40001 nioo Seton NK Poe 1 H z s evaa e ee nro 0001 D Ve fale 2 as ez LT 24 iI k nee ve a as vIzozoi L 0201 ja v mm VEOOZNTIN se 9 d l 2 z e034 se T sr T amr n inodwv im __ yur 5 n m Ls v T 1 H r z sn Beozor sizo azo L 20215 Ez 1 aoza a 27 0001 gt ck 9 sr I wm 4 z a Y PA zonu E spl m sk 5 p Lu a 3 15 TAR KEE T noo anviornvivod 2 2 km H oroe ano bs 1 ssa f z wo m meno noe DHL SONNO ozy z 2055
52. 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 serial interface module 1MB standard RAM and memory expansion available up to 32MB of RAM with the addition of optional SIMMs Bidirectional parallel interface Toner saver mode supported Q A multi user multi emulation mode QIES Intelligent Emulation Switch allows switching between EPSONScript mode and another mode SPL Shared Printer Language enables switching of the printer mode by command Figure 1 1 shows an exterior view of the EPL 5500 Figure 1 1 Exterior View of the EPL 5500 Rev B 1 1 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 Description Note C8321 8 indows Printing System ROM SIMM Supports Windows Printing System C8321 9 PSONScript Level 2 ROM SIMM Supports EPSONScript Level 2 mode PostScript Level 2 compatible fonts and commands see Note 1 8 220 239 ROM SIMM Supports ESC P 2 2390 2391 emulation modes and IBM LSP Bitmap 2 font ROM Supports local NLSP bitmap fonts see Note 2 LSP Scalable font ROM Supports local NLSP scalable fonts see Note 2 C812491 P50 sheet lower paper cassette for the PL 5500 A4 B
53. EPSON TERMINAL PRINTER EPL 5500 SERVICE MANUAL EPSON 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 The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequence thereof Epson is a registered trademark of Seiko Epson Corporation General Notice Other product names used herein are for identication purposes only and may be trademarks of their respective campanies Copyright 1995 by SEIKO EPSON CORPORATION Nagano Japan PRECAUTIONS Precautionarv notations throughout the text are categorized relative to 1 personal injurv and 2 damage to equipment DANGER Signals a precaution which if ignored could result in serious or fatal personal injurv Great caution should be exercised in performing procedures preceded bv DANGER Headings WARNING Signals a precaution which if ignored could result in damage to equipment The precautionarv measures itemized below should alwavs be observed when performing repair maintenance procedures DANGER 1 ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI PHE
54. ID PWB D Laser diode drive board LD APC1 LDVRI LD APC1 LDVR2 co a ro wo 5 oo S SCAN a oo ro THERMOSTOR DC5V HV C Fusing roller heater lamp HVT H1 High HV SEL1 voltage unit injojsjajojnjojo ro A a lt gt gt ro PWB S CN209 Paper Take up solenoid SL2 2nd paper feeding unit option 1 2 HV SEL2 3 4 5 TF1 a Bo ro BIAS MON FUSER LAMP GND DC24V DC24V FEED2 N C DC5V GND P EMP2 PSIZEO 2NDBIN mm inch UNIVERSAL CHECK1 lt A ro x 2 Inter lock switch Fusing roller thermal fuse Inlet board Power SW Figure A 2 Cable Connections for the Engine Controller Inlet Rev A EPL 5500 Service Manual Connector Table A 1 Board Connector Summarv Description Appendix Reference lain Board C169 MAIN B Board Centronics parallel interface Table 1 8
55. On 2 5 6 Table 5 9 LED Does Not Come On 3 5 8 Table 5 10 The LED Does Not Come On 4 5 9 Table 5 11 Software Errors iii ae tad is cuu Ei DEEP eaten OSEE 5 9 Table 5 12 Fusing Unit ErtOt be See he Mads 5 9 Table 5 13 The Fan Motor Error sis bb ai a hh obi cee eR Rn ala 5 9 Table 5 14 Scanner Motor ETO ud n we aad oca tae e c a EE 5 9 Table 5 15 Laser Light Error 5 10 Table 5 16 Communication 5 10 Table 5 17 EEPROM Write 5 10 Table 5 18 Engine Initialize 5 10 Table 5 19 C1000 or C1001 5 10 Table 5 202 61002 5 tus tow Erf e 5 10 Table 5 2 1 1009 O EXVOC Pe EE XE 5 11 Table 5 22 1130 Error us pego a l oe dr Pace ERE B La S 5 11 Table 5 23 Gl iv ah Ra anu d Sat eae a i ati ila 5 11 Table 5 24 1180 5 11 Table 5 25 C1300 or C1310 Error 5525 ek A hex os Ea ead 5 11 Table 5 26 1 20 Error c 22 525 bara mai ed dot B ce 5 12 Table 5 27 1990 Erol iru eom ale ata DR ES CE e ten 5 12 Table 5 28 Print Quality
56. P1284 reverse mode Rev B 1 11 General Description EPL 5500 Service Manual Compatibilitv Mode 7 rward Forward moe r ACK and BUSY Idle H ie uc y 4 ailed SLCT IN HIGH SLCT IN LOW ERR HIGH ERR LOW mn j No data sent p Sending data ERR LOW Sending data Data Not a ERR HIGH FEED LOW Data X Available No data sent Request to 2 send data AUTO AUTO BEBDSBJIN FEED HIGH Reverse ERR LOW Si Interrupt Idle Host J e E i i Figure 1 4 Parallel Interface State Switch Diagram Figure 1 4 shows the switch diagram for the parallel interface state 1 12 Rev B EPL 5500 Service Manual General Description Figure 1 5 shows the negotiation timing chart DATA 00h or 04h SEL IN STROBE E AUTO FEED ACKNLG BUSY Peripheral Busy Status PE Current Peripheral Status 1 SLCT Note 2 ERROR Current Peripheral Status Notet gt p lt gt lt Compatibility Negotiation HBDAor ldleor HB DNA Transfer Note 3 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 DA Host Busy Data is Available HB DNA Host Busy Data is Not Availab
57. PWB F Housing High PWB S Voltage Image Transfer Unit Charger PWB A 2nd Paper Feeding Unit Option Figure 2 10 Engine Controller Connecting Diagram Rev B 2 7 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 Paper Exit Roller Upper Fusing Roller Lower Fusing Roller PC Drum Pre image Transfer v2 Roller NA 29 SS T 4 Optional Second Paper Feeding Unit Paper Take Up Roller Paper Transport Roller Fig 2 11 Gear and Roller Positions 2 8 Rev B 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 bv 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 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 Todetect paper size The printer detects the time it takes for paper to pass the paper take up sensor during paper fe
58. RAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE 2 NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK 3 WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING 1 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTI FIED REPAIR TECHNICIAN 2 MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUMBER RATING PLATE IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE DO NOT CON NECT IT TO THE POWER SOURCE 3 ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND OR INDIVIDUAL CHIPS 4 INORDER PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY USE STATIC DISCHARGE EQUIPMENT SUCH AS ANTI STATIC WRIST STRAPS WHEN ACCESSING INTERNAL COMPONENTS 5 REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE INTRODUCTION OF SECOND SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WAR RANTY SAFETV INFORMATION This printer is a page printer which operates bv means of a laser There
59. RIENTATION PORT LAND MANUAL FEED OFF ON RITech OFF LIGHT MEDIUM DARK TONER SAVE OFF ON FONT SRC RESIDENT SIMM DOWNLOAD 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 PeMultiling PcE Europe PcTk437 WiAnsi WiE Europe WiTurkish DeskTop PsText Velnternati VeUS MsPublishin Math 8 PsMath VeMath PiFont Legal UK ANSI ASCII Swedis2 Italian Spanish German Norwegl French2 Windows FORM 5 to 128 lines SRC SYMSET 0 to 3199 DEST SYMSET 0 to 3199 ERR SHEET OFF ON MicroGray OFF ON PROTECT LEVEL 1to5 With option 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 Spainl Japan Norway Denmark2 Spain2 LatinAmeric Korea Legal Table 1 12 Printer Settings Continued Menu Available Options ev EPL 5500 Service Manual ESCP2 Continued Auto CR General Description ON OFF Auto LF OFF
60. ages and the service call error message 1 4 4 1 Status Messages The LED lights normallv 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 SOFT ERROR Printer detected a CPU error or soft error Refer to Chapter 5 PAPER JAM JA paper jam has occurred Open the cover and remove the ammed paper Then close the cover PRINTER OPEN Cover is open Close the cover MANUAL FEED Select manual feed beginlnsert paper and press button rinting data PAPER SET paper is left in either thelLoad paper in paper tray or optiona standard tray or the optionalcassette and press button cassette PRINT OVERRUN Engine speed faster than print imagePress the button processing MEM OVERFLOW Data has filled the buffer Confirm and press the button And add optional SIMM HECK PAPER SIZE he paper size in the tray is differentChange the paper and print again from the paper size chosen IMAGE OPTIMUM fhe printer uses a lower printErase downloaded data or add quality 1 4 4 3 Service Call Error Message The LED lights flash randomly when the printer detects a service call error Refer to Chapter 5 Rev B 1 27 General Description EPL 5500 Service Manual 1 4
61. ame 24 FEED2 NC GND1 PE2 PSIZO PSIZ1 PSIZE2 CHECK1 CHECK2 CHECKS 1 2 3 4 5 6 7 8 9 Description 24 VDC Lower cassette solenoid on No connected 5 VDC Ground Lower cassette paper empty Table A 13 CN210 Pin Assignments Signal Name Description Not connected 24 VDC Ground 5 VDC Polygon motor control Table A 14 CN211 Pin Assignments Pin No Signal Name 1 24V 24 VDC 2 FAN Fan control Rev A EPL 5500 Service Manual Appendix A 2 CIRCUIT DIAGRAMS 10K TR 18 RM9 RM10 IMMA ik ik 18321 IRLJO 3 86 8 AI2 27 AD 7 ERA 5 BN 06 TA SIRBX Bio Be 8 e Ne SBa 0 1U R16 1001 2 MEM mes NEP Locat Language L A gig ES 33K coo m o u EM RM AB Sov 98 5 Zzzzzz gt RESET DOTCLK 45 i E R38 032 PJ L3 BBX GND GND VPP DFAT 20DP 2DSA vop S2 EPRDYX FaH ze PRINT BH E cnpji 081 12 ps aj Si Engin EPROMANBDIP otrller
62. andby at low temperature The upper fusing roller is controlled to maintain 112 C 2 10 Rev B EPL 5500 Service Manual Operating Principles Rev B 2 11 Operating Principles EPL 5500 Service Manual If anv of the following conditions are detected the printer indicates a fuser error 1 If the thermistor detects the temperature has not risen by 20 C for 50 msec within 12 to 30 sec after warm up This error applies only when the thermistor detects a temperature of 90 C or less 2 If the thermistor detects that the temperature has not reached 172 C within 60 sec after warm 3 Except pause mode see the note below if the thermistor detects that the temperature in the idle state has fallen to 80 C or lower for 50 msec or the temperature during printing has fallen to 133 C or lower 4 The thermistor detects that the temperature has exceeded 193 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 fusing section rises to an abnormally high level over 200 C 392 F 2 1 2 4 Scanner Motor Control Figure 2 16 is the scanner motor M2 control circuit The scanner motor is driven while it receives the POLYGON CTL signal Motor rotation speed is 8622 rpm Main Board C169 MAIN B Scanner Motor Figure 2 16 Scanner Motor Control Circuit
63. bus bit 1 Address bus bit 2 Address bus bit 3 Address bus bit 4 Select signal Appendix A 5 Appendix EPL 5500 Service Manual Table A 3 CN4 Pin Assignments Continued Signal Name 2 DEI Description Read strobe signal IWrite strobe signal Interrupt to option Non maskable interrupt Data request LT option used unused 5 VDC 5 VDC 5 VDC 5 VDC Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used Ground Ground Ground Ground Reset signal disabled Request command ready Data read request Write enable Read enable I F used unused Not used Not used Not used Not connected 5 VDC 5 VDC 5 VDC 5 VDC Rev A EPL 5500 Service Manual Appendix Table A 4 CN5 Pin Assignments Signal Name Description Data bus bit 0 Data bus bit 16 Data bus bit 1 Data bus bit 17 Data bus bit 2 Data bus bit 18 Data bus bit 3 Data bus bit 19 5 VDC Read strobe Address bit 0 Address bit 1 Address bit 2 Address bit 3 Address bit 4 Address bit 5 Address bit 6 Address bit 10 Data bus bit 4 Data bus bit 20 Data bus bit 5 Data bus bit 21 Data bus bit 6 Data bus bit 22 Data bus bit 7 Data bus bit 23 Address bit 7 Address bit 19 5 VDC Address bit 8 Address bit 9 Address bit 20 Chip select Reset signal Address bit 21 Address bit 22 Address bit 23 Ground Address bit 11 Address bit 13 Address bit 14 Address bit 12 Chip
64. conditions O Do not remove the circuit board from the optical unit under any conditions Open the top cover Remove the right cover left cover and front cover Refer to Section 3 2 1 1 Remove the cover shield plate Disconnect connector CN205 and CN210 from the C169 MAIN Board Remove the 6 screws 4 from the optical unit Remove the optical unit apr oN 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 Disassembly and Assembly EPL 5500 Service Manual ASSEMBLY POINTS After reinstalling the image transfer unit check that the unit smoothly moves up and 2 gt VAN 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 1 Figure 3 8 Reinstalling the Electrode Comb 3 8 Rev B EPL 5500 Service Manual Disassembly and
65. 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 Press the button the number of times for the 1st code while the yellow light is flashing Press the button the number of times for the 2nd code while the red light is flashing Press the button the number of times for the 3rd code while all lights flash gre Grp If you need end the default settings mode return step 2 and input the 111 code If you need set the other settings return to step 2 Thable 1 14 shows default settings codes Table 1 14 Default Settings Codes Default Settings Codes 1st 2nd 3rd Code Code Code Available Options End of default settings mode PARALLEL SPEED Bi D WORD LENGTH BAUD RATE PARITV STOP BIT DIR XON XOFF l l AJIAJ AIAI KR WW ON IO With option Table 1 14 Default Settings Code Continued Default Settings Codes 2nd Code Code Code Available Options Di ev EPL 5500 Service Manual General Description EMULATION PARALLEL
66. e Manual General Description 1 3 3 Optional LocalTalk Interface This printer can use the optional LocalTalk serial interface module Tvpe LocalTalk Signal level Same as RS 422 signal level Protocol X ON X OFF cannot be combined with 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 Signal Name Signal output by the printer When the DTR signal is HIGH the printer can receive the RXD signal The printer transmits the data through while CTS is HIGH Serial ASCII data output from the printer IHIGH level when SD voltage is higher than the SD voltage ILOW level when SD voltage is less than the SD voltage Logic 0 is SPACE and logic 1 is MARK The state must be maintained between transmitted character codes Ground Serial ASCII data input from computer IHIGH level when RD voltage is higher than RD voltage ILOW level when RD voltage is less than RD voltage Logic 0 is SPACE and logic 1 is MARK state must be maintained between transmitted character codes Refer to TXD INo connect Refer to RXD Rev B T 17 General Description EPL 5500 Service Manual 1 4 This section describes functions performed through the control panel such as printing a status sheet hexadecimal dump and printer settings functions
67. e 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 Developing Cartridge Note 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 ev Chapter 2 Operating Principles Table of Contents 2 1 ENGINE OPERATION 2 1 86 gt 2 oci RUE D Rand See Pe ee ee ts 2 2 Paper ke eo eval IRE 2 3 2 1 1 2 Drum 2 4 21 13 Laser EXPOS T G e hte ohio hrs ee da rth 2 5 2 1 1 4 2 5 21 15 Image Transfer so si Pede whee PS 2 6 2 119 PUSIIO we Bye Soh 2 6 21 2 Engine i Ne Siero ne 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
68. eding If this time is long longer paper is feeding if the time is short shorter paper is feeding 3 detect paper jams and feed jams If the paper take up sensor does not turn on for paper feeding the printer detects a feed jam or no paper A feed jam is a paper jam that occurs in the feed process If any of the following conditions is detected the printer detects a paper jam A paper jam is a jam that occurs in the printing process area e The paper take up sensor PC1 or the paper exit sensor PC3 is on at power on or when the upper case is closed e The paper take up sensor PC1 or the paper exit sensor PC3 is not turned on off within the specified time Refer to the following timing chart Take Up Solenoid ON seconds CN203 3 CN208 3 Figure 2 13 Paper Take Up Sensor and Paper Exit Sensor On Off Timing Rev B 2 9 Operating Principles EPL 5500 Service Manual 2 1 2 3 Fuser Control The heater lamp powered bv AC voltage heats the fuser When the power supplv board receives a FUSER signal from the main board C169 MAIN B the power supplv board PWB E supplies the AC voltage to the heater lamp This AC voltage is cut by an interlock switch when the case is open Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analog voltage to the 77 pin chip IC201 Based on this temperature data the heater lamp on off signal the FUSER
69. eplace the C169 MAIN B Board 5 13 Troubleshooting EPL 5500 Service Manual Table 5 15 Laser Light Error Checkpoint Finding Solution he optical unit may be Replace the optical unit Replace the C169 MAIN B Board Table 5 16 Communication Error he C169 MAIN B Board aon the C169 ay be bad MAIN B Board Table 5 17 EEPROM Write Error Checkpoint Finding Solution Replace EEPROM Replace the C169 MAIN B Board Table 5 18 Engine Initialize Error he C169 MAIN B Board 1 Replace the C169 ay be bad MAIN B Board Table 5 19 C1000 or C1001 Error Checkpoint Finding Solution Is operation OK after you Replace the SIMM remove the optional SIMM2 he C169 MAIN B Board Replace the C169 ay be bad MAIN B Board Table 5 20 C1002 Error Cms O Checkpoint he C169 MAIN B EL Li the C169 ay be bad MAIN B Board 5 14 Rev B EPL 5500 Service Manual he optional SIMM may be bad Table 5 21 C1003 Error Checkpoint Is the operation OK after you remove the optional SIMM2 Finding Ves Troubleshooting Solution Replace the SIMM he program ROMs on the 169 MAIN B Board may be Table 5 22 C1130 Error Checkpoint Is operation OK after you replace the ROM Finding Replace the C169 MAIN B Board Solution Replace the program ROMs on the C169 MAIN B Board he ROM IC11 on the C169
70. es unsupported commands for the GL 2 mode print cannot be assured Optional modes EPSONScript Level 2 PostScript Level 2 emulation mode FX FX 870 1170 LX 100 emulation mode ESC P 2 Stylus 800 1000 emulation mode WPS Windows Printing System mode Auxiliary software Hex dump Status sheet Font sample Built in fonts See Table 1 7 Table 1 7 Built in Fonts Resident Fonts Bitmap fonts ine Printer16 66 cpi Portrait Dutch 801Roman SWC Dutch 801Bold SWC Dutch 801Italic SWC Dutch 801Bold Italic SWC Swiss 7428WC Swiss 742Bold SWC Swiss 742Medium Italic SWC S Supported NS Not Supported 0 02002 0000 Rev B 1 7 General Description EPL 5500 Service Manual Table 1 7 Built in Fonts Continued Applicable Mode 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 ourierItalic SWC ourierBold Italic SWC S Supported NS Not Supported 0 00000002000 ev 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 paral
71. has a capacity equivalent to several lines This is controlled by the E05A92 which synchronizes and transmits the temporary buffers data to the engine controller board The E05A92 then manipulates the printer data based on the BiRITech EMGTech and toner saver settings E05A91 E0593 IC2 C4 Host Computer Temporary RITech Buffer EMGTech Video Toner sav i oner save Development Parallel Serial Converter 05 92 IC3 Input Buffer Svstem Area DRAM Figure 2 27 Data Flow Diagram Rev B 2 19 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 45V 45V RSTIN RSTOUT RESET Vcc OUT M51938FP E05A92 IC6 IC3 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 BEO BE1 BE2 and BES signals byte enables to the ASIC E05A91 The ASIC E05A91 uses these signals to generate the RD read strobe signal WR write strobe signal and READY signal AS CPU 05 9 MB86933H IC2 Address Data RD WR Bus Bus Figure 2 29 Bus Control Ci
72. he HVB signal is the digital signal for developing bias voltage control This signal controls the bias on off The BIAS MON signal controls the bias voltage level 300 V to 375K VDC using pulse data The image density is controlled by the developing bias voltage level Power Supply Main High Voltage Supply Board Board Board PWB E C169 MAIN B PWB F Drum Charge 2 0 VDC 2 Image Transfer 0 He Interlock c L 4 3K to 6 K VDC sw E Developing me puces Blas 270 to 370 VDC i mee Doctor Toner Blade i Bias 500 VDC Seal Bias 250 VDC Figure 2 20 High Voltage Supply Block Diagram 2 14 Rev B EPL 5500 Service Manual Operating Principles Figure 2 21 shows the print process Brush Roller Charging Laser Exposure Development y7 Image Transfer Figure 2 21 Print Process Figure 2 22 shows the start print sequence The printers engine starts printing when it receives the PRINT signal from the video controller circuit M3 normal rotation m sec Print lt 4000 gt Command Polygon Motor 4 20 M3 1st 790 to 1300 Paper Take up f Sensor PC1 2nd 2670 to 3080 Paper Take up Solenoid SL1 2 Main Motor i 150 UE 500 lt gt 1st 770 2nd 2320 Drum Charge H 2310 gt Laser 200 4 gt 500 i i 480 Development gt 4 gt
73. here are two tvpes of power supplv 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 Figure 1 19 PWB E Board 1 5 3 PWB F Board The PWB F is the high voltage supplv circuit board It converts the development bias OPC drum charge bias and image transfer bias CAUTION Do not touch VR3 on the PWB F board These volumes are for factory setting only Figure 1 20 PWB F Board ev 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 polvgon mirror for laser scanning and several mirrors and lenses The laser beam generated bv the laser diode is conducted to the OPC drum surface bv wav of the polvgon 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 5 Fusing Unit The fusing unit fixes the toner to the paper using heat and pressure This unit has a heater lamp thermistor and thermal fuse There are two types of fusing units the 120 V type and the 220 240 V type The only difference between them is the heater lamp Figure 1 22 Fusing Unit ev E General Description EPL 5500 Service Manual 1 5 6 Photoconductor Unit Core mechanisms of th
74. iagram 2 18 Figure 2 28 Reset Circuit 2 19 Figure 2 29 Bus Control 2 19 Figure 2 30 DRAM Management 2 20 Figure 2 31 Parallel Interface 2 21 List of Tables Table 2 1 Functions of C169 MAIN B Board Main Elements 2 17 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 ki Optional Second Paper Feeding Unit Figure 2 1 Main Components 1 Fan Motor 11 Paper Feeding Tray 2 Lower Fusing Roller 12 Paper Lift up Plate 3 Paper Exit Sensor PC3 13 Paper Empty Sensor P11 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 Electrode 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 Optical Unit Print Exit Ex
75. ical 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 1 Use only the recommended tools to ensure safe and efficient maintenance work Inappropriate tools may damage the machine O Never open the upper unit until the main motor stops completely Otherwise the gears may be damaged O When transporting the printer remove the photoconductor unit and toner cartridge from the printer O 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 Commercially Available Philips screwdriver no 2 B743800200 egular screwdriver B743000100 weezers B641000100 Soldering iron B740200100 B740400100 Rev B 3 1 Disassembly and Assembly 3 1 3 Small Parts EPL 5500 Service Manual 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 Size mm Length mm Appearance 6 8 14 6 8 10 12 3 2 Rev B EPL 5500 Service Manual Disassembly and Assembly 3 1 4 Service Checks
76. int position of the horizontal line 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 eTurn VR201 counterclockwise to decrease the gap Turn on the printer Print a status sheet again to check the print position Repeat steps 5 to 7 until the print position is 29 6 mm 1 17 inches Reattach the shield plate and right case Rev B 4 1 Chapter5 Troubleshooting Table of Contents 5 1 OVERVIEW 5 1 5 2 SELF DIAGNOSTIC FUNCTION 5 1 521 SOFFERROB anri oe bien a hak RE 5 1 52 2 SEVICE Gall EO ea a cis ite aa e dr gen wre Rara o rar dta 5 2 5 3 TROUBLESHOOTING 5 4 5 3 1 Troubleshooting of Abnormal Operation 5 4 5 3 2 Print Quality 5 13 List of Tables Table 5 1 SOFT ERROR Code List 5 1 Table 5 2 Service Call A 5 2 Table 5 3 Service Call B 5 3 Table 5 4 Symptoms and Reference Tables 5 4 Table 5 5 The Printer Does Not Operate at All 5 5 Table 5 6 Both LED Lights Do Not Come 5 5 Table 5 7 The LED Does Not Come On 1 5 5 Table 5 8 The LED Does Not Come
77. is no possibilitv of danger from the laser provided the printer is operated according to the instructions in this manual provided Since radiation emitted bv the laser is completelv confined within protective housings the laser beam cannot escape from the machine during anv 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 Radia tion Control for Health and Safety Act of 1968 This means that the printer does not produce hazardous laser radiation CDRH Regulations The Center for Devices and Radiological Health CDRH of the U S Food and Drug Administration implemented regulations for laser products on August 2 1976 Com pliance is mandatory for products marketed in the United States The label shown below indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States WARNING Use of controls adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure Internal Laser Radiation Maximum Radiation Power 5 0 x 10 W Wave Length 790 20nm This is a Class IIlb Laser Diode Assay that has an invisible laser beam The print head unitis NOT AFIELD SERVICE ITEM Therefore the print head unit should not be opened under any circumstances Fo
78. it 2 Remove each cover in the following turn ASSEMBLY POINTS When reinstalling each cover securely insert the protrusions of the cover into the cutouts of the printer frame 4 Rear Cover 3 Operation U it pper uni Gare Upper unit lock release button 2 Front Cover 1 Left cover Figure 3 1 Removing the Housing 3 4 Rev B 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 Board C169 MAIN B Board Removal CAUTION Before vou remove the video controller board make sure that vou remove anv optional LocalTalk serial board or Tvpe 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 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 O Do not touch the optical unit except at the time of replacement O Do not open the unit under any
79. itch toggle Check with a multimeter Replace the interlock switch With power on is there an output of 24 VDC between pin 1 and pin 2 fon CN207 on C169 MAIN B board Replace the PWB E board he paper take up sensor flag position may be incorrect Is the paper take up sensor flag position OK Reposition the paper take up sensor flag he paper exit sensor flag position may be incorrect Is the paper exit sensor flag position OK Reposition the paper exit sensor flag he paper take up sensor onnector may be disconnected Is the paper take up sensor connector disconnected Connect it paper exit sensor onnector mav be disconnected Is the paper exit senson connector disconnected Connect it he paper exit sensor may Replace it he paper take up sensor be dead 5 8 Replace it Rev B EPL 5500 Service Manual Table 5 8 The LED Does Not Come On 2 he paper take up solenoid oil mav be open or shorted Checkpoint Disconnect connector CN203 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 Finding Troubleshooting Solution Replace the paper take up solenoid If the coil is shorted check the solenoid drive circuit using the procedure below 1 Set the mu
80. ke Up Roller 3 22 Rev B Chapter4 Adjustment Table of Contents 4 1 ADJUSTMENT 4 1 4 1 1 Print Position Adjustment e repete Rene ee cd ie P eos 4 1 List of Figures Figure 4 1 Print Position 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 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 2 Print a status sheet Check that the registration gap between the leading edge of the sheet and the horizontal line printed on the page is within the following range 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 Settings Figure 4 1 Print Position Adjustment Turn printer power off Open the right cover and shield plate See Chapter 3 Adjust the image synchronizing adjustment volume VR201 on the main board C169 MAIN B so that the gap for the pr
81. layed Error code C1002 A C1002 is displayed Error code C1003 A C1003 is displayed Error code C1130 A C1130 is displayed Error code C1170 A C1170 is displayed Error code C1180 A C1180 is displayed Error code C1300 or C1310 A C1300 or C1310 is displayed Error code C1320 A C1320 is displayed Error code C1990 A C1990 is displayed 5 6 Rev B EPL 5500 Service Manual Troubleshooting Table 5 5 The Printer Does Not Operate at All Checkpoint Finding Solution onnector CN207 the Is connector CN207 on the Connect CN207 169 MAIN B Board may be C169 MAIN B Board the board disconnected disconnected he fuse on the PWB E board Has the fuse blown on the Replace the fuse ay be blown PWB E board PWB E board may be dead With power on is there an Replace the PWB output of 5 VDC between pin 4 board and pin 3 for CN207 on C169 MAIN B Board 169 MAIN B Board may be Replace the C169 MAIN B Board Table 5 6 Both LED p Do Not Come On me Checkpoint he C169 MAIN B Board may If you change the C169 MAIN B the C169 be dead Board do the LEDs come on MAIN B Board Table 5 7 The LED Does Not Come On 1 Rev B 5 7 Troubleshooting he interlock switch lever 1 Checkpoint Does the switch turn on when the case is closed EPL 5500 Service Manual Finding Solution Replace the interlock ever Does the sw
82. ld down the button until the yellow and red lights go on then release the button to continue printing U While the yellow light is on except in WPS mode 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 U Reset always effective except during warm up or status sheet printing Function of button Clears current port Operation Hold down the button until the yellow and red lights go on and when these lights start flashing alternately 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 and red lights start flashing at the same time then release the button ev General Description 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 Printer Settings PRINTING COPIES EPL 5500 Service Manual Available Options 1 to 999 PAGE SIZE A4 A5 B5 LT HLT LGL GLT GLG EXE F4 MON C10 DL C5 IB5 CTM O
83. le Figure 1 6 shows the data transfer timing chart Notes DATA SEL IN STROBE AUTO FEED l 1 ACKNLG ET BUSY Peripheral Busy Status Bit 3 Bit 7 Peripheral Busy Status PE Bit 2 Bit 6 Noe SLCT Bit 1 Bit 5 Note 2 ERROR Bit 0 Bit 4 Note 1 gt ba ba HB DA Negotiation ldle or Transfer HB DA or HB DNA Note 3 Figure 1 6 Timing Chart for Data Transfer 1 Thissignalis set to HIGH when no data is being sent This signal is set to LOW during sending of data 2 Thissignal is set to HIGH if extension request value was 04h 3 HBDA Host Busy Data is Available HB DNA Host Busy Data is Not Available ev General Description EPL 5500 Service Manual Figure 1 7 shows the timing chart for termination DATA SEL IN js STROBE AUTO FEED Note 3 N ACKNLG BUSV Peripheral Busv Status Peripheral Busy Status PE Note 1 Current Peripheral Status SLCT Note 2 ERROR Note 1 Current Peripheral Status HB DNA Idle Termination Compatibilitv or HBDA Figure 1 7 Termination 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 request value was 04h 3 Idle LOW Figure 1 8 shows the timing chart for interrupts DATA SEL IN STROBE AUTO FEED ACKNLG
84. lel interface has the following two modes Compatibility mode same as parallel interface for EPSON s current page printer Reverse mode 1 3 1 1 Parallel Interface Compatibility Mode System STROBE synchronization 8 bit parallel data transfer Handshaking BUSY and ACKNLG signals Connector type P90 25027 1 Amphenol receptacle Applicable plug 57 30360 Amphenol or equivalent Transfer speed Approximately 400 000 bytes second max Signal timing See Figure 1 3 Signal description See Table 1 8 0 5 ys 0 5 ys minimum minimum DATA 1 8 0 5 us minimum STROBE 0 5 ys maximum 0s BUSY 0 5 or 5 us min minimum gt ACKNLG 10 us typical Figure 1 3 Compatibility Mode Signal Timing ev General Description EPL 5500 Service Manual Table 1 8 Parallel Interface Pin Assignments Pin No Signal Name STROBE is a strobe pulse used to read data from the host computer The pulse width must be more than 0 5 usec 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 The signal state must maintained for 0 5 usec on either side of the STROBE signa active edge ACKNLG is an acknowledge pulse with an approximate widt of 1 or 10 usec Thi
85. ller for printer mechanism control Except for VIDEO PRINT VSINC and 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 Chapter3 Disassembly and Assembly Table of Contents 3 1 GENERAL INFORMATION 3 1 3 1 1 Precautions for 3 1 lee MODIS MC Miata be hee ike eth aad gfe 3 1 See Smal s Masses Op dos cdd Seta B oe 3 2 3 1 4 Service Checks after 3 3 3 2 DISASSEMBLY AND ASSEMBLY 3 4 3 2 1 HOUSING NE MOVAl erie ak es era ae 3 4 3 2 1 1 Case 3 4 3 2 2 Removal of the Controller 3 5 3 2 2 1 Main Board C169 MAIN B Board 3 5 3 2 3 Disassembling the Engine 3 6 3 2 3 1 Optical Unit 3 6 3 2 3 2 Image Transfer Unit 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 3 11 3 2 3
86. ltimeter for voltage Place the terminal of the multimeter on pin 5 of connector CN207 on the C169 MAIN B Board Place the terminal of the multimeter on pin 6 GND With power on does the multimeter detect any current Replace the paper Rev B Continued on next page 5 9 Troubleshooting EPL 5500 Service Manual Table 5 8 The LED Does Not Come On 2 Continued Checkpoint Finding Solution he main motor coil mav bej bpen or shorted Disconnect connector CN206 on the C169 MAIN B Board land check the coil resistance between pin 1 and pin 2 pin3 land 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 No Replace the main motor If any coil is shorted check the main motor drive circuit using the following procedure 1 Set the multimeter to voltage 2 Place the terminal of the multimeter on pins 1 2 3 or 6 of connector CN206 on the C169 MAIN B board 3 Place the terminal on pin 2 of connector CN207 of the C169 MAIN B Board GND With power on does the multimeter detect current Yes Replace the C169 MAIN B Board Paper take up sensor bosition may be incorrect flag Is paper take up sensor flag position incorrect Yes Reseat the paper take up sensor flag Paper take up roller
87. lty printing complex graphics intensive pages or if you regularly use downloaded fonts you may need to install one of the optional SIMM sets on this printer s controller board The printer s controller board comes with 1MB of RAM installed By installing additional SIMMs you can increase the printer s memory to a total of 32MB including the resident memory EPSON supplies several types of memory option SIMMs Other SIMMs can be purchased from other vendors Be sure the SIMM meets the requirements listed below 72 pin type Capacity is one of the following 1 2 4 8 16 32MB Access speed is less than 70 ns Within the following dimensional size 36 mm height x 108 mm width x 10 mm depth ev E General Description EPL 5500 Service Manual 1 5 To simplifv maintenance and repair the main components of the EPL 5500 have been designed for easv removal and replacement The main components are LY C169 MAIN B Board Main board LY PWB E Board Power supply circuit board LY PWB F Board High voltage supply circuit board Optical Unit Printhead unit Fusing Unit Photoconductor unit Developer cartridge Housing C169 MAIN B Board Optical Unit o PW F Board Figure 1 17 Component Layout 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 primarv functions of this boa
88. may be bad Replace the paper take up roller 5 10 Rev B EPL 5500 Service Manual Troubleshooting Table 5 9 The LED Does Not Come On 3 Checkpoint Finding Solution he standard Is the standard tray OK Refer to Table 5 8 broblems he paper take up solenoid coil Disconnect junction Replace the pape or the lower paper cassette connector near the solenoid take up solenoid ay be open or shorted and check the coil resistance between pin 1 and pin 2 on the No disconnected solenoid side of the connector using al multimeter Is the resistance approximately 80 ohms If the coil is shorted check Replace the pape the solenoid drive circuit take up solenoid and using the following circuit board of lowe procedure paper cassette 1 Set the multimeter to voltage 2 Place the terminal on pin of connector CN2 on the lower paper cassette board B Place the terminal on of ground of CN1 With power on does the multimeter detect current he paper take up roller in the Replace the pape ower paper cassette may be take up roller bad Rev B 5 11 Troubleshooting EPL 5500 Service Manual Table 5 10 The LED Does Not Come On 4 Checkpoint Finding Solution Install consumables he consumables may not Are the consumables installed nstalled No Replace the take up roller Does paper always jam in paper take up rolle
89. mp cloth that has been soaked in a neutral cleaning solution Internal Cleaning Be sure the printer has been disconnected from the power supply and that the fusing unit has cooled down If the electrode comb of the image transfer unit is dirty clean it with a special tool using the following steps Figure 6 1 Position of the Special Tool 1 Pickup the electrode comb cleaner from the upper unit 2 Wipe the electrode comb surface from end to end with the electrode comb cleaner several times Electrode Comb Cleaner y Cleaner section Pre image Transfer Roller Image Transfer Rear Guide Figure 6 2 Cleaning the Electrode Comb Rev B 6 1 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 If the image is still too light replace the toner cartridge cartridge If the printed image remains faint after you have replaced the toner cartridge change the photo conductor unit 6 1 2 Service Maintenance This section describes the periodic service maintenance and the cleaning required 6 1 2 1 Periodic Service Maintenance
90. ns for the Engine Controller A 2 Figure A 3 C169 MAIN B Circuit Diagram 1 2 A 11 Figure A 4 C169 MAIN B Circuit Diagram 2 2 A 13 Figure 5 PWB E 120 Circuit A 14 Figure 6 PWB E 220 240V Circuit Diagram A 15 Figure A 7 C169 MAIN B Component Layout A 16 Figure A 8 C169 MAIN B Component Layout A 17 List of Tables Table A 1 Board Connector Summary A 3 Table 2 CN2 Pin 510 A 4 Table CN4 Pin A 5 Table 4 CN5 Pin A 7 Table 5 CN202 Pin A 8 Table 6 CN203 Pin A 8 Table A 7 GN204 Pin 5 A 9 Table A 8 CN205 Pin A 9 Table A 9 CN206 Pin A 9 Table 10 CN207 Pin A 9 Table A 11 CN208 Pin A 9 Table A 12 CN209 Pin
91. ons on the preceding page The chapters are organized as follows CHAPTER 1 GENERAL DESCRIPTION Provides a general product overview lists specifications and illustrates the main components of the printer CHAPTER 2 OPERATING PRINCIPLES Describes the theory of printer operation CHAPTER 3 DISASSEMBLY AND ASSEMBLY Includes a step by step guide for product disassembly and assembly CHAPTER 4 ADJUSTMENTS Includes a step by step guide for adjustment CHAPTER 5 TROUBLESHOOTING Provides Epson approved techniques for adjustment CHAPTER 6 MAINTENANCE Describes preventive maintenance techniques 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 REVISION SHEET Revision Issue Date Revision Page Rev A October 06 1995 1st issue Revise the whole pages of the following chapters Chapter 1 Chapter 2 Rev B March 15 1996 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Vii Chapter 1 General Description Table of Contents 1 14 FEATURES 1 1 1 2 SPECIFICATIONS 1 3 1224 Basie Specifications ticas Rd ete thee ed ERA 1 3 1 2 2 Electrical 5 lt 1 5 1 2 3 Reliability 5
92. peed 6 ppm letter A4 First printing time A4 LT Warm up time Less than 35 seconds at rated current and 23 C 73 Paper supply See Table 1 2 Less than 20 seconds face up output Table 1 2 Paper Feed Methods Capacity ame 20 Ib 75 g m Paper Paper Supply Standard built in paper tray Paper Size 5 B5 A4 LT GLT EXE LGL GLG F4 HL General Description Laser beam scanning and dry electrophotography F temperature Usage Thickness Ream Weight 16 to 24 Ib 60 to 90 g m Monarch DL C5 C6 International Commercial 10 B5 Envelopes made of 20 to 24 Ib 75 to 90 g m paper anual feed slot Any size feedable Note 2 16 to 42 Ib 60 to 157 g m ower paper cassette optional Notes A4 B5 16 to 24 Ib 60 to 90 g m 1 The weight in pounds Ib is determined by the weight of 500 sheets cut to 17 x 22 inches 0 2659763 Ib width length 1 g m 2 Paper size range Paper types See Table 1 3 3 to 8 5 inches 76 to 216 mm 5 to 14 0 inches 127 to 356 mm Table 1 3 Paper Types Rev B 1 3 General Description 1 4 Standard paper Xerox 4024 DP paper 20 Ib 75 g m EPL 5500 Service Manual ormal paper Regular photocopier paper Bond paper Recycled paper 16 to 24 Ib 60 to 90 g m Special papers 4 0 Card stock 90 to 157 g m Envelopes Labels Letterhead Tran
93. plemented instruction C0255 CPU error break error AXXXX Software error Bxxxx Software error Dxxxx Software error Fxxxx to Zxxxx Software error Rev B 5 1 Troubleshooting EPL 5500 Service Manual 5 2 2 Service Call Error If the printer detects a fatal error that unrecoverable bv 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 IM Service Call A Errors Indication First yellow and red LED lights go on and off twice alternately Then both yellow and red LED lights go on and off a number of times correspondning to the error number in the table 5 2 Example Fan motor error error number 2 LED Yellow Interval Service call error indication Error code 2 LED on for 2 times o Table 5 2 Service Call Error Error No Error Code Error Condition Fusing unit error Fan motor error Scanner mirror motor error Laser light error Communication error for engine controller and video controller EEPROM write error Engine initialize error IM Service call B error Indication First vellow and red LED lights go on and off three times alternatelv to indicate that the printer start to display Service Call B Error The error number of Se
94. posure Develop ment Paper Feeding Trav Second Paper Feeding Unit optional b en Eli a A Les A Figure 2 2 Print Process Diagram 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 trav 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 bv 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 trav The starting position of an image is decided bv the paper take up sensor PC1 A photo sensor is used as the paper take up sensor PC1 and the paper exit sensor PC3 Paper Feeding Tray Standard Tray When the paper take up solenoid is energized the main motor M1 drive is transmitted to the paper take up roller via the paper take up clutch a one way clutch to rotate the paper take up roller one revolution At the same time the depression cam rotates and releases the paper lift up plate to feed the top first paper The fixed separating pad is used for the paper separation system It prevents the second or later sheets from being fed together with the top paper Upper Fusing Roller Paper Exit Roller Fusing Roll oller Paper Exit Sensor PC3
95. r 25 000 sheets Note MPBF indicates average number of pages printed before occurrence of problem requiring replacement or service MTBF Mean Time Between Failures Jam rate Feed failure Multiple paper feeds Paper curl height Leading edge bending 1 cm or more MTTR Mean Time To Repair Durability 3000 power on hours POH 1 out of 2 000 sheets or less excluding multiple sheet feeding 1 out of 2 000 sheets or less excluding multiple sheet feeding 1 out of 500 sheets or less 30 mm 1 2 inches or less 1 out of 1 000 sheets 30 minutes or less 5 years or 180 000 sheets 1 2 4 Environmental Conditions for Operation Including Imaging Cartridge Temperature Humidity Altitude Levelness Surrounding space 10 to 35 C 50 to 95 F 15 to 85 RH 2 500 m 8 200 feet or lower 1 3 000 lux or less Must not be exposed to direct sunlight Printer should have at least 100 mm of clearance on its sides and rear 1 2 5 Environmental Conditions for Storage and Transportation Temperature Humiditv Drop test Vibration Resistance to atmospheric pressure Storage life 1 6 0 to 35 C 32 to 95 F 30 to 85 RH Clear to JIS Z0200 1987 Level 1 Vibration frequency 5 to 100 Hz and 100 to 5 Hz Acceleration 1G Acceleration direction 3 direction More than 61 3 KPa 18 months following date of manufacture Rev B EPL 5500 Service Manual General Description 1
96. r 5 0 x 1077 W og b lgelengde 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 This laser product conforms to the applicable requirement of 21 CFR Chapter subchapter J SEIKO EPSON CORP Hirooka Office 80 Hirooka Shiojiri shi Nagano ken Japan MANUFACTURED iv For Europe LASER KLASSE NACH IEC 825 CLASS 1 LASER PRODUCT TO IEC 825 KLASSE 1 LASER PRODUKT IHT IEC 825 LUOKAN 1 LASERLAITE Label inside printer The following laser safety label will be attached inside the printer as shown below For Denmark Finland Sweden and Norway CAUTION INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM VORSICHT UNSICHTBARE LASERSTRANLUNG WENN ABDECKUNG GEOFFNET NICHT DEM STRAHL AUSSETZEN ADVARSEL USYNLIG LASERSTRALING NAR DEKSEL APNES UNNGA EKSPONERING FOR STRALEN VAROI AVATTAESSA OLET ALTTINA NAKVMATON LASERSATEILYLLE ALA KATSO SATEESEN ADVARSEL USYNLIG LASERSTRALING VED ABNING UNDG UDSATTELSE FOR STRALING VARNING OSYNLIG LASEASTRALNING DENNA DEL PPNAD STRALEN FARLIG 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 precauti
97. r Other Countries Users WARNING Use of controls adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure This is a semiconductor laser The maximum power of the laser diode is 5 0 x 10 W and the wavelength is 790 20 nm For Denmark Users ADVARSEL Usynlig laserstraling ved abning nar sikkerhedsafbrydere er ude af funktion Undga udseettelse for str ling Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene For Finland Sweden Users VAROITUS Laitteen kayttaminen muulla kuin tassa kaytt6ohjeessa mainitulla tavalla saat taa altistaa k ytt j n turvallisuusluokan 1 ylitt v lle n kym tt m lle laser sateiylle VARNING Om apparaten anvands pa annat satt n i denna bruksanvisning specificerats kan anv ndaren uts ttas f r osynlig laserstralning som verskrider gr nsen laser klass 1 For Finland Sweden Service People VAROITUS Avattaessa ja suojalukitus ohitettaessa olet alttiina n kym tt m lle laser s teilylle l katso s teeseen VARNING Osynlig laserstr lning n r denna del r ppnad och sp rren r urkopplad Betrakta ej str len For Norway Users ADVARSEL Dersom apparatet brukes p annen m te enn spesifisert i denne bruksanvis ning kan brukeren utsettes for unsynlig laserstr ling som overskrider grensen for laser klasse 1 Dette er en halvleder laser Maksimal effeckt til laserdiode e
98. r area he paper take up roller may be bad Yes Replace the feed roller Does paper always jam in the paper feed roller area he paper feed roller may be bad Yes Does paper always jam in the Replace it fusing unit he fusing unit may be bad Table 5 11 Software Errors he C169 MAIN B Board Replace it 1 ay be bad Table 5 12 Fusing Unit Error Checkpoint Finding Solution he connector for the Is the connector for the Connect it hermistor may be thermistor disconnected disconnected he C169 MAIN B Board mav be dead Replace the C169 MAIN B Board Does the heater lamp remain lit up until the error occurs he heater lamp or thermal use in the fusing unit may be bad Does the heater lamp come ion at power on Replace the heate lamp or thermal fuse in the fusing unit he PWB E board may be onnector CN211 on the 169 MAIN B Board may be disconnected Checkpoint Is connector CN211 on the C169 MAIN B Board disconnected Table 5 13 The Fan Motor Error Finding Replace the PWB E board Solution Connect it he fan motor may be dead Table 5 14 The Scanner Motor Error 5 12 Replace it Rev B EPL 5500 Service Manual he optical unit mav be bad Checkpoint Finding Troubleshooting Solution Replace the optical unit he C169 MAIN B Board may be bad Rev B R
99. rcuit 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 terminals IRLO IRL3 Then an interrupt is sent to the CPU When the IRLO 3 value is 1111b the CPU process is a non maskable interrupt process When the IRLO 3 value is 0000b the CPU process is a standard process When the IRLO 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 x 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 SIMMs 32 bit bus The DRAMs including optional SIMMs are managed by the ASIC E05A91 E05A91 outputs MAQ 10 memory address RAS CAS and WE signals E05A91 SIMM IC2 50 1 2 3 0 10 CPU DATA BUS Figure 2 30 DRAM Management Rev B 2 21 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
100. rd 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 ICI is used and the following memorv chips and custom ICs are assigned to the 4GB memory space U Memory chips Code and font ROMs four 4M bit EPROMs IC13 14 15 16 or two 8M bit mask ROMs IC21 22 Optional NLSP font ROM 4M bit or 8M bit ROM IC12 Not available in U S version 4M bit DRAMs IC17 18 EEPROM IC11 Q Custom ICs ASIC E05A91 IC2 ASIC E05A92 IC3 ASIC E05A93 ICA 0 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 mirror drive motor image synchronization laser beam pulse width and power There are two types of C169 MAIN B boards used as after service parts The following table shows differences between them Table 1 16 Differences in Components for the C169 MAIN B Board Tt Version Version IC12 None IC socket Jumper J20 Open Short E05A93 IC4 MB86933H 3 IC1 05 92 IC3 E05A91 IC2 L I Figure 1 18 C169 MAIN B Board ev E General Description EPL 5500 Service Manual 1 5 2 PWB E Board The PWB E is the power supplv board which consists of a switching regulator circuit It converts the AC line voltage into 424 V and 45 VDC voltages T
101. re two types of protocols as listed below and each of them can be designated by SelecType independently 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 cleared and the printer returns to on line mode the signal returns to HIGH 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 transmission is independent 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 EPL 5500 Servic
102. resets the BUSY signal after reading the data from the 05 93 so that the printer is ready to receive more data from the host computer DATA E05A93 STROBE BUSY 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 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 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 the commands from the video controller or the status from the engine contro
103. rface remains 0 V at the position between the rotating charge brush and sleeve roller At this time a specified positive voltage is applied to the sleeve roller to prevent toner from being attracted back onto the PC drum reverse bias control Vs terminal VBL terminal VB terminal VB Developing Bias VBL Toner Blade Bias C169 MAIN B PWB F 1 201 CN204 e T Vs Lower Seal Bias Figure 2 7 Development Toner hopper Contains toner 2 Toner agitating screw Stirs the toner in the hopper and sends the toner to the toner transport roller Toner transport roller Transports the toner to the sleeve roller 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 Sleeve roller Rotates the resin sleeve Resin sleeve Carries the toner to the PC drum surface for development Bias seal Collects the toner remaining on the resin sleeve PC drum Is exposed to the laser to create an invisible image and rotates to carry the developed image to the paper surface Rev 2 5 Operating Principles EPL 5500 Service Manual 2 1 1 5 Image Transfer The electrode comb is an image transfer svstem that transfers the toner image on the PC drum onto the paper Image Transfer Unit Housing SZ 2 Housing 2 AD Electrode Comb
104. rom 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 adjust signals they are analog signals LDAPC1 is a tuning and LDAPC2 is a fine tuning Scanner Motor On 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 voltage control circuit These bias voltages are generated from the 24 VDC from the high voltage supply board PWB F If the printer detects a case open condition the interlock switch is set to off which cuts the 24 VDC which in turn cuts the bias voltages These bias voltages are controlled by the main board C169 MAIN B The HV T signal is the image transfer bias voltage control While this signal is LOW the image transfer electrode comb is charged to from 3 to 6K VDC by the high voltage supply circuit HV SEL1 and HV SEL2 are image transfer bias level control signals T
105. rvice Call B Error consists of 4 digits number and each LED light indicates corresponding number from 4th digit to 1st digit in the following order Yellow LED 4th digit X Red LED digit X Yellow LED 2nd digit Red LED 151 digit X 5 2 Rev B EPL 5500 Service Manual Troubleshooting Note that if any digit of corresponding error number is both yellow and red LED lights go on and off once at the same time Rev B 5 3 Troubleshooting Example EPL 5500 Service Manual Standard ROM error error number 1130 LED Yellow Interval Service Call Error B indication Error code 1130 4th digit 1 2 3 4 5 6 7 8 9 3rd digit 1 N 2nd digit 3 Co N 151 digit 0 5 4 Table 5 3 Service Call B Error Rev B EPL 5500 Service Manual Troubleshooting Error No Error Code Error Condition 2 RAM Validation error Svstem RAM check error Standard RAM error Optional RAM SIMM error Standard ROM error Optional NLSP fonts ROM error Optional ROM SIMM error O Optional Type B error Unsupported Type B installed LocalTalk I F error O O CO Other hardware error Rev B 5 5 Troubleshooting
106. s signal goes LOW when the data reception i completed which indicates that the printer can accept new data Timing with the BUSY signal is specified through SelecType Ihe BUSY signal informs the host computer of the printer state When the signal is HIGH the printer cannot accept data The PE signal indicates paper empty for the standard tra selected through SelecType or command or for the optiona paper cassette Paper empty is indicated by HIGH SLCT Used in reverse mode AUTO FEED Not used NC Not used GND Logic ground level CHASSIS GND Connected to the printer chassis The printer chassis GND and the signal GND are connected to each other NC Not connected Ground level for the twisted pair return signal The STROBE signal is ignored when this signal is LOW This level goes LOW when the printer is e Out of paper e Paper jam e In the error state e Off line Same as for pins 19 to 30 Not used Pulled up to 5 V through 1 0K ohm resistance Used in reverse mode ev 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 Svstem IEEE P1284 nibble mode Connector tvpe P90 25027 1 Amphenol receptacle Applicable plug 57
107. s the following functions Video interface e Bi parallel interface ocalTalk module control Tvpe B EX interface box control IC21 22 or IC13 14 15 16 These ROMs are code and font ROMs IC12 This ROM is a local language font ROM option except i the U S model IC11 This EEPROM stores the following Model type e Printed page counter value e Jam counter value e Printer setting 2 18 These DRAMs are used as the working area of the CPU input buffer image buffer etc Rev B 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 bv 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 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 board If such an error occurs the user can increase the V RAM using the printer setting IMAGE OPTIMUM The E05A91 transmits image data stored 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 temporary buffer The temporary buffer
108. select Chip select Address bit 18 Write enable Address bit 17 Data bus bit 8 Rev A A 7 Appendix Signal Name 24 Data bus bit 24 Data bus bit 9 Data bus bit 25 Data bus bit 10 Data bus bit 26 Data bus bit 11 Data bus bit 27 Data bus bit 12 Data bus bit 28 5 VDC Data bus bit 29 Data bus bit 13 Data bus bit 30 Data bus bit 14 Data bus bit 31 Data bus bit 14 Address bit 7 Not used Not connected Not connected Not connected Address bit 15 Ground Ground No connected 24 VDC Paper take up sensor EPL 5500 Service Manual Table A 4 CN5 Pin Assignments Continued Description Description Paper take up sensor Paper take up solenoid drive Rev A EPL 5500 Service Manual Table A 7 CN204 Pin Assignments Pin No Signal Name LDAPC1 GND1 LDATA Signal Name Description Ground 24 VDC Horizontal synchronous signal Laser power signal Laser power adjust 2 Laser power adjust 1 Motor phase A Motor phase A Motor phase B Motor phase B Heater lamp on Table A 11 CN208 Pin Assignments Signal Name VO Description Paper exit sensor 5V round 1 PS3 2 ND 3 PS3 Rev A Paper exit sensor SGL Appendix A 9 Appendix A 10 EPL 5500 Service Manual Table A 12 CN209 Pin Assignments Signal N
109. signal is output from the 54 pin chip IC201 causing heater lamp H1 to turn on or off to control the fusing temperature When the heater lamp is not turned off even if the thermistor detects a high temperature malfunction which occurs if the surface temperature of the upper fusing roller exceeds 200 C the signal from the 75 pin chip IC201 changes from H to L to turn off the heater lamp forcibly C169 MAIN B Analog Voltage Detected by the Thermistor TH1 2 202 d 1 1 Thermal Fuse Heater Lamp ON OFF Signal H1 OFF Figure 2 14 Fuser Control Circuit The following figure shows the fuser temperature control procedure Temperature When a print is made immediately after warm up Degrees C 172 156 112 Time A Power On i L 1 le Warm up Standbv Standby with Low Temperature Figure 2 15 Temperature for Fuser Control Procedure 1 Warm up After printer initialization printer warm up starts and the heater lamp turns on until the upper fusing roller s temperature reaches approximately 172 C 2 Standby In standby mode the upper fusing roller s temperature is controlled to maintain 156 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 172 C 4 St
110. sparency sheets Colored paper Printable Area 44 0 mm 4 1 2 Printable Area EPL 5500 Service Manual General Description Usabilitv of special papers See Table 1 4 Table 1 4 Usabilitv of Special Papers Envelopes Card Stock Letterhead ower paper cassette R Reliable feeding and good image quality P Possible but better avoided N Not supported Paper feed alignment and direction Center alignment for all sizes Paper ejection Face down Output tray capacity 100 sheets face down Printable area standard paper See Figure 1 2 Note The actual printable area depends on the printer mode Noise Less than 35 dB A standby Less than 47 dB A operating Ozone density Less than 0 01 ppm Toxicity No toxicity exists in organic photoconductor OPC toner or plastic materials Rev B 1 5 General Description 1 2 2 Electrical Specifications Table 1 5 Electrical Requirements and Ranges EPL 5500 Service Manual Description 100 V Version 200 V Version ated voltage 100 120 VAC 220 240 VAC nput voltage range 90 132 VAC 198 264 VAC ated frequency range nput frequency range ower consumption Less than 500 W Less than 600 W ower consumption while in standby mode 1 2 3 Reliability Specifications Less than 15 W without option MPBF Mean Prints Between Failures Ove
111. t PWB F board Replace the board Image transferlmage transferCheck to see if theReplace the problem unit surface of imagetransfer unit transfer unit is damaged PWB F board Replace the board Defective PC drum jPhotoconduc Replace tor unit photoconductor unit Improper print Adjust the print densit densitv setting using printer settings oggy background Poor development Toner cartridge Replace the tone cartridge Improper charging Drum charge Replace the board Check the wiring of theReplace PC drum charging biasphotoconductor unit line Improper print Adjust the print densit density setting n printer settings Rev B 5 17 Troubleshooting EPL 5500 Service Manual Table 5 28 Print Qualitv Anomalies Continued Svmptom Possible Cause Part Name Check Item Poor development Imaging Check whether theReinstall the cartridge toner cartridge iscartridge installed properly PWB F board Replace the board Improper charging PWB F board Replace the board Poor imagelmage transferCheck the surface ij cds the transfer unit the image transfer unit transfer unit PWB F board Replace the board Improper print Adjust the print density densitv setting n SelecTvpe Defective opticalOptical unit Replace the optical unit unit Black print Improper charging Photoconduc Replace the tor unit photoconductor unit PWB F board
112. 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 specified in the accompanying documentation 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 after release the printer enters nomal state without initialize operation 1 4 3 3 Factory Reset Mode The factory reset mode resets the printer settings to the factory default settings the page counter and jam counter are not cleared To enter factory reset mode release the button at the mode select timing Pattern 3 and press the button again within 2 seconds after release The LED lights flashes alternately during the reset operation If the button is not pressed within 2 seconds after release the printer enters the nomal state without reset operation ev General Description EPL 5500 Service Manual 1 4 3 4 Default Settings The
113. ve the image transfer unit Refer to Section 3 2 3 2 Remove 1 screw 5 and remove the drive tension section of the fusing unit Remove the transport gear Release the hook of the spring and remove the drive gear section of the fusing unit ASSEMBLV POINTS ap on gt When rehooking the spring be sure to hook it at the correct position drive gear section of the Fusing unit drive transport hook of the spring drive tension section of the Fusing unit Figure 3 15 Gear and Spring Position 6 Remove 4 screws 5 and remove fusing guide plate 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 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 B 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
114. 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 Since the BiRITech effect depends on the toner condition adjusted it when the imaging cartridge is replaced or after the imaging cartridge is used for a long time 1 inch When 600 DPI printing 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 ev EPL 5500 Service Manual General Description 1 4 8 Toner Save Mode The Toner Save Mode uses about 5090 less toner than normal The printer saves toner bv substiuting a grav shade for the black inside of characters the outlines of the characters are still printed in full back 1 4 9 Optional Memorv Upper Edge Left Edge Figure 1 16 Toner save Mode If you have difficu

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