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Troubleshooting

En-= Service

5.3.2 Troubleshooting

Print Quality Problems

This section describes how to isolate print quality problems from their possible causes and remedy
them, as shown in Table 5-39.

Table 5-39. Print Quality Problems

Symptom

Possible Cause

Part Name

Check Item

Remedy

Low image

Paper

Check to see if the
paper is moist.

Replace the paper.

Imaging

—

Replace the imaging

Improper

cartridge

PRINTER

charging

board

—

the

board.

PRINTER

Window of

Check the

unit is

the optical

Poor image

transfer

—

Replace the

roller

Blank print

Window of optical

unit is dirty.

Optical unit

—

the window.

Imaging

Replace the imaging

Poor

Cartridge

—

cartridge.

development

board

—

Replace the

board.

Poor image

board

—

Replace the

board.

transfer

—

Replace the

roller

Black print

board

—

Replace the

board.

Improper

charging

Imaging

Replace the imaging

cartridge

—

cartridge.

band

Window of optical
unit is dirty.

Optical unit

—

Clean the window.

Poor image

“ER

transfer

roller

—

Replace the

roller.

OPC

Imaging

Replace the imaging

cartridge

—

S-14

Rev.

Summary of Contents for EPL-9000

Page 1: ...EPSON TERMINAL PRINTER SERVICE MANUAL EPSON ...

Page 2: ...nsequence thereof Epson and Epson ESCPare registered trademarks and Epson isa tradernarkof Seiko Epson Corporation Fontware FaceLift Swiss and Dutch are trademarks of BitStream Inc Times and Omega are registered trademarks of Miles Inc Univers is a registered trademark of Linotype AG and or its subsidiaries Antique Olive is a trademark of Fonderie Olive Albertus is a trademark of Monotype Corporat...

Page 3: ...ANUAL DO NOT CONNECT THE UNITTOA 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 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT AGE LISTED ON THE NUMBER RATING PLATE ...

Page 4: ...chine during any phase of user operation For Europe WARNING Use of controls adjustments or performan than those in this manual in hazardous This is a semiconductor laser maximum power of the laser diode is 5 and the gth is 780 nm For Denmark ADVARSEL ved sikkerhedsafbrydere er ude af for 1 laser produkt der opfylder kravene I For Finland Sweden Users kuin taa 1 Orn apparaten annat i denna g specif...

Page 5: ...om overskrider grensen for laser 1 Dette er en laser effeckt er 5 og er 780 nm Laser Safety Labels Label on rear printer case A laser safety labels is attached on the outside of the printer shown below For Europe 1 NACH 825 1 PRODUCT TO 825 1 IEC 825 LUOKAN 1 iv ...

Page 6: ...inside printer The following laser safety label will be attached inside the printer as shown For and Norway OPEN OPEN AND INTERLOCKS DE EXPOSURE TOMAM EL IA LAS DEL AR UND ATTENTION EMISSION DE EST RAYON LASER ...

Page 7: ...nd 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 ...

Page 8: ...REVISION SHEET Revision Date Rev 5 1994 Revision Page I issue vii ...

Page 9: ...TABLE OF CONTENTS CHAPTER 1 CHAPTER 2 CHAPTER 3 CHAPTER 4 CHAPTER 5 CHAPTER 6 APPENDIX GENERAL DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE ...

Page 10: ...de of Parallel 1 3 1 2 Reverse Mode 1 3 2 Serial Interface 1 17 1 3 3 Optional LocalTalk Interface 1 4 OPERATING INSTRUCTIONS 1 20 1 4 1 Control Panel 1 4 2 Functions Mode 1 4 3 1 Hexadecimal Dump Mode 1 4 3 2 Language Setting Mode 1 4 3 3 Factory Service Mode 1 4 3 4 EEPROM Format Mode 1 4 4 Display ofMessages 1 4 4 1 Status Messages 1 4 4 2 Error Messages 1 4 4 3 Warning Messages PrinterSharing ...

Page 11: ...onent Layout 1 34 Figure 1 17 C135 MAIN Board 1 35 Figure 1 18 l F Board Figure 1 19 Control Panel 1 36 Figure 1 20 MCU PWB Board Figure 1 21 LVPS Unit Figure 1 22 HVPS Drive Figure 1 23 ROS Unit Figure 1 24 Fusing Unit Figure 1 25 Drive Unit Figure 1 26 Imaging Cartridge List of Tables Table Options for 1 2 Table 1 2 Paper Feed Methods Table 1 3 Paper Types Table 1 4 Usability of Special Paper 1 ...

Page 12: ...ology the print quality by eliminating jagged edges from images and characters on 600 and 300 printing Optional Level 2 PostScript compatible module EPSON Micro Gray Technology which is when using Level 2 mode refines gray scale printing to be comparable to printing on a printer Small and low cost optional LocalTalkTM interface module 2 MB standard RAM and up to 64 MB RAM with the addition of Bidi...

Page 13: ...ports local fonts Yes 1 1 250 8 1 2 4 2 size Yes 250 sheet universal paper tray size paper size tray Yes Lower paper cassette unit Lower paper cassette unit No include paper cassette Yes Imaging cartridge Toner cartridge Yes LocalTalk Module Yes 32 interface card Yes 32 KB parallel card Yes Yes COAX interface card Yes interface card Yes Ethernet interface card for Yes Note card cannot be used with...

Page 14: ...1 2 Table 1 2 Paper Feed Methods Capacity Paper Supply 17 Paper Size Standard built in paper tray or cassette optional lower A4 Letter paper cassette unit paper cassette I 250 A5 EXE B F4 l T EXE I I Manual feeder 5 lntemational B5 MON C1O DL Notes 1 pounds lb is determined weigh 1 g m2 0 2659763 lb 2 The printer can use manual feed for paper by hand 3 When inserting AS horizontal Usage Thickness ...

Page 15: ...of Special Paper Input Standard Normal paper paper Envelopes Card Stock Paper tray R R P N P N Manual feed R R P P P P Envelope cassette N N N P N N R Reliable feeding and good image quality P Possible but better avoided N Not supported Paper size range 98 mm 3 87 inches to 297 mm 11 7 inches Width 140 mm 5 5 inches to 432 mm 17 inches Length Paper feed alignment and direction Center alignment for...

Page 16: ...4 Rated frequency range 50 60 Hz Input frequency range 47 63 Power consumption Less than 500 W Less than 600 W 1 2 3 Reliability Specifications Mean Prints Between Failures Over 12 000 sheets Note indicates average number of pages printed before occurrence of problem requiring replacement or service Jam rate 1 out of 3 000 sheets or less Standard paper 1 out of 2 000 sheets or less Normal paper 1 ...

Page 17: ...over storage term 20 to C 4 to 104 under extreme conditions Extremes are allowable for up to storage term Temperature variation must be 10 C 18 F hour or less 20 to RH over full storage term 5 to under extreme conditions Extremes are allowable for up to full storage term Height 52 cm Vibration frequency 5 to55 Acceleration Acceleration direction 3 More than 740 12 months following date of manufact...

Page 18: ...extreme conditions Extremes are allowable for up to 1 30 of full storage term Temperature variations must be 10 C 18 F hour or less Humidity 20 to RH over full storage term 5 to RH under extreme conditions Extremes are allowable for up to 1 30 of full storage term Drop test Height 76 cm 30 4 inches Vibration Same as printer Resistance to atmospheric pressure More than 740 Storage term 24 months fo...

Page 19: ...g Available in Switch to Not supported Reset E Ejects and then initialize Ejects paper switches to and then PJL EJL and ES supported supported Advance Full Page supported Not Notes EPSON mode has two operational modes One is mode the other is the mode emulates the mode in the LaserJet 4 emulation The user can print with software that supports the HP 7600 series plotter The mode features all the co...

Page 20: ...densed Italic s NS NS Swiss 742 Bold Italic Condensed s NS NS Incised 901 s NS NS Incised 901 Black s NS NS Incised 901 Italic s NS NS Original s NS NS Original Bold s NS NS Original Italic s NS NS Original Bold Italic s NS NS Audrey Two s NS NS 821 s NS NS 821 Extra Bold s NS NS Swiss 721 Roman s s NS Swiss 721 Bold s s NS Swiss 721 Oblique s NS NS Swiss 721 Bold Oblique s NS NS Dutch 801 Roman s...

Page 21: ...talian ANSI ASCII UK German 8859 2 1S0 Spanish 8859 9 VeMath DeskTop Math 8 PcTk437 windows IBM US VeUS PiFont symbol Wingdings 2 Mode 15 International characters and 9 code tables USA JAPAN GERMANY NORWAY UK DENMARK2 ITALY KOREAR LEGAL Mode 13 International characters and 9 code tables USA FRANCE JAPAN GERMANY NORWAY UK DENMARK2 ITALY 1 1o Rev ...

Page 22: ... EPSON s current page printer Reverse mode 1 3 1 1 Compatibility Mode of Parallel Interface System STROBE synchronization 8 bit parallel data transfer Handshaking BUSY and signals Connector type receptacle Applicable plug 57 30360 or equivalent Transfer speed Approximately 400 000 bytes second max Signal timing See Figure 1 3 Signal description See Table 1 8 minimum minimum I I DATA 1 8 VALID mini...

Page 23: ...at the printer can accept new data with the BUSY signal is specified through The BUSY signal informs the host computer of the printer state When the is HIGH the minter cannot 2 9 DATA 1 8 IN 10 OUT OUT 12 BUSY The PE signal indicates paper the standard tray selected through or command or for the optional PE OUT OUT paper Paper empty is indicated by HIGH Use in reverse mode 13 14 SLCT AUTO FEED IN ...

Page 24: ...st nibble mode 10 ACKNLG OUT Printer data sending clock 11 BUSY Printer sending data bits 3 and 7 during data transfer to host computer 12 PE Printer sending data bits 2 and 6 during data transfer to host computer 13 Printer sending data bits 2 and 6 during data transfer to host computer HostBusy This signal informs the printer of the host computer 14 AUTO FEED IN state When the signal is HIGH the...

Page 25: ...arallel interface state switch diagram Compatibility Mode Forward Data ACK and Transfer IN LOW No data sent ERR LOW I Sending data AUTO FFFD LOW Request to send data AUTO FE ED LOW AUTO ERR LOW Figure 1 4 Parallel Interface State Switch Diagram ...

Page 26: ...t to HIGH if extension request value was Note3 HB DA Host Busy Data Available HB DNA Host Busy Data Not Available Figure 1 6 shows the data transfer timing chart DATA STROBE AUTO FEED BUSY PE ERROR Peripheral Busy Bit 3 Bit 7 Peripheral Status Bit 2 Bit 6 N e 1 Bit 1 Bit 5 N e 2 Bit O Bit 4 HB DA Negotiation HB HB DNA Note 3 Figure 1 6 Data Transfer Timing Chart Note 1 The signal is set to HIGH wh...

Page 27: ...tion or DA Figure 1 7 Termination Timing Note 1 The signal is HIGH when DNA The signal is LOW when DA Compatibility chart Note 2 The signal is set to HIGH if the extension request value is Note3 Idle LOW Figure 1 8 shows the interrupt DATA STROBE AUTO FEED BUSY Peripheral Busy status PE Note 1 ERROR Reverse Idle Interrupt DA Transfer Figure 1 8 Interrupt Timing Chart Note 1 signal is set to HIGH i...

Page 28: ...racter codes Logic O is at HIGH level SPACE and logic 1 is at LOW level MARK 3 IN Serial ASCII input to the printer It maintains MARK state LOW level between received character codes 4 RTS Transmission request signal output from the printer It is always at HIGH level during power ON 5 CTS IN Always ignored Signal input to the printer The printer can transmit data through while is at 6 IN HIGH leve...

Page 29: ...rotocols as listed below and each of them can be designated by independently protocol is used to execute the control protocol The 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 is used to set the OFF is ...

Page 30: ... printer When the signals HIGH the signal can be received by the printer IN The printer transmits the data through while CTS is Serial ASCII data output from the printer HIGH level when SD voltage is higher than SD voltage OUT LOW level when SD voltage is less than SD voltage Logic O is SPACE and logic 1 is MARK state must be maintained between transmitted character codes Ground Serial ASCII data ...

Page 31: ...that indicates printer status A variety of printer parameters can be displayed and set using mode Indicator lights On Line on Communication with the host is possible with the host is not currently possible Flashing This state occurs when the system cannot shift from off line to on line or vice versa Form Feed This LED indicates the data processing condition for each interface channel S P L and O o...

Page 32: ...t is flashing clears an error Enter to reset operation LCD displays RESET printing stops and the input buffer of current interface is cleared If the RESET button is depressed continuously after RESET is displayed the message displayed on the LCD changes to RESET ALL about 5 seconds and the printer enters to WARM BOOT operation printer clears all RAM Modifies the function of other buttons Enters mo...

Page 33: ... OFF LIGHT MEDIUM DARK LJ4 FONT SRC RESIDENT CARTRIDGE DOWNLOAD FONT NUMBER O to available PITCH 0 44 to 99 99 step 0 01 HEIGHT 4 00 to 999 75 PT Step 0 25 Roman 8 8859 2 ISO 8859 9 ISO IBM US DeskTop VeUS Math 8 PiFont Legal UK ANSI ASCII Italian Spanish German Windows FORM 5 to 128 LINES SRC o to 3199 DEST o to 3199 Ps ESCP2 Font Courier Orator S Ser Rornsn T sane l l Prestige Script Pitch 10 12...

Page 34: ...N OFF Auto LF ON OFF Zero Char o Bit Image Dark Light BarCode GLMODE LJ4GL2 SCALE OFF AO Al A2 A3 ORIGIN CORNER CENTER PEN 0 1 2 3 4 5 6 END SQUARE TRIANGULAR ROUND JOIN MITERED MITEREDBEVELED TRIANGULAR ROUND BEVELED NONE PENO 0 05 to 5 00 mm step 0 05 PEN1 0 05 to 5 00 mm step 0 05 PEN2 0 05 to 5 00 mm step 0 05 PEN3 0 05 to 5 00 mm step 0 05 PEN4 0 05 to 5 00 mm step 0 05 PEN5 0 05 to 5 00 mm s...

Page 35: ...T TRAY UNLOCK LOCK SIZE IGNORE OFF ON AUTO CONT OFF ON STANDBY DISABLE ENABLE AUTO SENSE ON PARALLEL SERIAL L T TOP o to 99 OFFSET oto150 TONER E F F F E F E F TONER LIFE PAGE COUNT o to 99999999 INIT PARALLEL SPEED FAST SLOW 61 D ON OFF SERIAL SERIAL TYPE RS422 WORD LENGTH 8 7 BAUD RATE 9600 19200 38400 57600 300 600 1200 2400 4800 PARITY NONE EVEN ODD STOP BIT 1 2 DTR ON OFF XON XOFF ON OFF DSR ...

Page 36: ...mat 1 4 3 1 Hexadecimal Dump Mode The hexadecimal dump mode is a useful tool in trouble shooting data control problems To enter hexadecimal dump mode turn on the printer while holding down the Form Feed button until HEX DUMP MODE is displayed 1 4 3 2 Language Setting Mode The language setting mode allows the user to specify a language for panel displays and the status sheet To enter language setti...

Page 37: ...L ROM Local Language ROM PS ROM Displayed Module ROM PRODUCT Page counter value CLEAR Page counter Note 1 CLEAR Toner left counter clear Jam value CLEAR Jam counter clear With option Note 1 This counter value is weight in imaging cartridge 1 4 3 4 EEPROM Format Mode EEPROM format operations are required only when the video board or EEPROM is replaced and these operations are specified m the accomp...

Page 38: ...or Messages Message Status Measures PAPER JAM A paper jam has occurred Open the cover and remove the jammed paper Then close the cover FEED JAM A paper jam has occurred in the Remove the jammed paper Then feed process press the Continue button PRINTER OPEN Cover is open Close the cover INSERT IMAGING No imaging cartridge Insert the imaging cartridge CRTG INSERT PAPER TRAY No paper cassette Insert ...

Page 39: ...orm Feed Remove and press light was on or the printer was on line Continue button SERVICE REQ Printer problem required Xxxxx 1 4 4 3 Warning If any of the following warnings occurs it will be displayed on the LCD panel Table 1 16 Warning Messages Message status Measures CHECK PAPER SIZE The paper in the selected tray is Press the Continue button different from the paper size chosen when SIZE IGNOR...

Page 40: ...er has two methods of printer sharing port fixed mode and auto sense mode These modes are selected by SelecType menu AUTO SENSE 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 Figure 1 10 Port Fixed Mode Memory Rev 1 29 ...

Page 41: ...e channels that are used interface that receives the data twill print first Mode Assignment mode FX mode User 1 Parallel mode mode I Mode Assignment mode FX mode Auto Sense User 2 L m 4 Memory Mode Assignment User 3 mode I UT FX mode mode made t Mode Assignment I mode FX mode User 4 Input buffer mode Figure 1 11 Auto Sense Mode 1 30 Rev ...

Page 42: ...ter It is able to skip among various destinations as shown in Figure 1 12 The precise specifications for this language are based on the HP LaserJet 4 The figure below shows three types of mode switching Neither nor switches the mode directly They first exit the current mode and return to or Then they enter another mode I LJ4 x I ESCP2 I Figure 1 12 Emulation Switch by 1 4 6 2 Intelligent Emulation...

Page 43: ... 1 inch 600 When 600 printing Figure 1 14 Effect of Note is not as effective for printing a mesh pattern or gray scale In such cases must be set to OFF The default setting is MEDIUM Since the effect depends on the toner condition it should be adjusted when the imaging cartridge is replaced or after the imaging cartridge is used for a long time following settings are available in Level for DARK MED...

Page 44: ...with 2 0 MB of RAM installed By installing additional you can increase the printer s memory to a total of 64 MB including the resident memory EPSON supplies several types of memory option SIMM Other 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 32 MB Access speed is less than 70 ns following dimensio...

Page 45: ...IN board Video controller board I F Optional LocalTalk module Control panel board Engine controller circuit board unit Low voltage supply unit HVPS board supply circuit board unit Optical unit Fusing unit Drive unit Imaging cartridge Housing Paper tray Lower paper cassette unit optional MAIN Board Unit Control Panel Board I Drive Unit Fusing Unit Figure 1 16 Component Layout 1 34 Rev ...

Page 46: ...ngine controller via the video interface A 32 bit 19 2 MHz RISC CPU MB86930 location ICI is used and the following memory chips and custom are assigned to the 4 memory space Memory chips Code ROM four 6 14 13 or two mask ROM 15 Font ROM two mask ROM M80A76 M80A77 DRAM 25 26 27 16K bit Custom Others RS 232C interface driver receiver MAX202 interface driver receiver MC34050 Reset ROMs I I CPU c I I ...

Page 47: ...puters module is available for a LocalTalk connection Main Chips ICI Figure 1 78 l F Board 1 5 3 Control Panel The control panel includes a 20 column x 1 row LCD panel which provides many functions for the printer e g displaying error messages or printer operation status o on ALT Item A R S U S u e Figure 1 19 Control Panel 1 36 Rev ...

Page 48: ...r image synchronization laser beam pulse width and power CPU Ul SMA7029M Figure 1 20 Board 1 5 5 Unit The unit is the low voltage supply unit which consists of a switching regulator circuit It converts the line voltage into and 5 VDC voltages There are two types of power supply board the 120V type and 220 240V type The difference between the two circuits is only in the input section Figure 1 21 Un...

Page 49: ...e for setting only VR102 1 22 Board 1 5 7 Unit The unit consists of the laser diode semi conductor laser the mirror motor scanner motor which drives the polygon mirror for laser and several mirrors and lenses The laser beam generated by the laser diode is conducted to the drum surface by way of the polygon mirror as well as several mirrors and lenses to a latent image on the drum Figure 1 23 Unit ...

Page 50: ...e only difference between them is the heater lamp Figure 1 24 Fusing Unit 1 5 9 Drive Unit The drive unit consists of the main motor and a series of gears and clutches It drives the paper transport rollers OPC drum sleeve roller fusing roller and some other mechanisms Figure 1 25 Drive Unit 1 5 10 Imaging Cartridge The core mechanisms of the printing process such as charging developing and are int...

Page 51: ...otorFunctions and Control REGl Sensor and Exit Sensor Fuser Control Scanner Motor Control LaserDiode Drive Bias Control Fan Motor and Chute Fan Motor Control PaperSize Detection Imaging Cartridge Sensor 2 1 3 10 Power Supply Circuit Function and Safety Protection 2 2 VIDEO CONTROLLER OPERATION C135MAlN Board Operation 2 23 2 2 2 3 2 3 2 4 2 4 2 5 2 5 2 6 2 6 2 7 2 8 2 1o 2 11 2 13 2 14 2 15 2 15 2...

Page 52: ...sm 2 2 11 Figure 2 21 Paper Transfer Mechanism Figure 2 22 Figure 2 23 Mechanism Figure 2 24 Engine Connecting Diagram Figure2 25 Main Motor Figure 2 26 Sensor and Sensor Timing 2 15 Figure 2 27 2 16 Figure 2 28 Temperature for Control procedure 2 16 Figure 2 29 Scanner Motor 2 17 Figure 2 30 Laser Diode Drive 2 18 Figure 2 31 Bias Control 2 19 Figure 2 32 Fan and Chute Fan 2 20 Figure 2 33 Imagin...

Page 53: ...s chute assembly 5 BIAS transfer roll 6 Chute fan M3 7 Fuser assembly 8 Pressure roller 9 Heat roller 10 Exit sensor 11 Thermistor 12 Interlock switch 13 Erase lamp assembly 14 Fan M4 15 Raster output scanner 16 CRU SENSOR PWB 17 Main motor Ml 18 Paper cassette 19 Paper size switch 20 Paper out sensor 21 Toner sensor 22 Feed solenoid 23 Feed roller 24 Turn roller 25 Turn solenoid 26 sensor 27 Pitc...

Page 54: ... the print process steps and 2 3 shows the print process diagram 1 Drum Charge I 2 Laser Exposure 3 Development 4 Image Transfer 1 5 Paper Separation I 6 Fusing 7 Cleaning 8 Quenching 1 Figure 2 2 Print Process Steps 7 Paper 9 Fusing 10 Paper Exit 5 Development Paper Pick up Figure 2 3 Print Process Diagram ...

Page 55: ...ure 2 4 Drum Charge 2 1 1 2 Laser Exposure Laser exposure is the process of creating an invisible static electricity image on the drum by laser beams emitted from the ROS Raster Output Scanner Assembly The polygon mirror is rotated by the polygon motor scanner motor This is a six sided mirror which rotates in the clockwise direction to produce a laser light scan one side of the mirror produces one...

Page 56: ...in Sleeve Development Bias CM Blade L 1 Bias Toner Figure 2 6 Development 2 1 1 4 Image transfer is the process of transferring the toner image created on the drum in the developing process to paper As the image transfer process this time we have the roller image transfer method instead of the image transfer In the roller image transfer method there is no generation of due to discharge Also there ...

Page 57: ... 2 1 1 6 Fusing Fusing is the process of fixing the toner image transferred from the image transfer process on the paper This time we have used the heating roller method for fusing The heating roller method is the process of fixing the toner image using the heat roll that is heated by the heater assy When switch on the power the heater assembly lights up until the temperature of the heat roll beco...

Page 58: ...e used toner bottle Drum Figure 2 10 Cleaning 2 1 1 8 Quenching After the cleaning process the re negative charges on the drum surface need to be eliminated to ensure proper print quality the next print process the drum surface is exposed to the light from the erase lamp to neutralize the drum surface potential Erase Light Lamp Drum Figure 2 11 Quenching Rev ...

Page 59: ...ocedure diagram and Figure 2 13 shows the paper feed mechanism diagram Paper pick up by feed roll I feed turn I Paper pick up by pickup roller of pickup roller assembly Paper by Upper and Lower of roll assembly Paper transportation by OPC drum and Paper transportation by heat roll and pressure roll of r Paper exit by exit roll Figure 2 12 Paper Feed Procedure Diagram Heat Roller Pinch Roller Press...

Page 60: ...the paper out actuator is lowered causing the shutter to interrupt light from the LED to the photMransistor causes the signal to go informing the engine driver board MCU that the paper cassette is empty The paper cassette of this printer has paper guide plate and paper size detecting cam paper guide of this cassette move to fit several size papers This printer detects paper size by the paper size ...

Page 61: ...ideo controller waits at paper feeding time This timing chart is Figure 2 16 I Video l F Signal Paper Position Video Controller Job Total Job Time Drum Feed Rolls Roll Image processing Figure 2 16 Printing Timing Chart 1 This printer fed paper until before registration section before the START signal of engine controller MC so that through put up This printer add Feed signal of video interface Whe...

Page 62: ...nditions are detected by the sensor located above the pickup rolls While paper is in the the actuator for the sensor is lifted When the paper supply runs out the actuator is lowered causing the shutter to light from the LED to the photo transistor This causes the signal to go HIGH informing the engine driver board MC that the is empty I Roll Upper Roil Assembly Tray Roll Lower Retard Pad Lower Chu...

Page 63: ...e or by the sensor After the sensor detects the paper top edge the clutch is turned on and the roll is rotated This time the engine controller MC sends the vertical synchronous TOP Top Of Paper signal to video controller Link Assembly Roil Assembly Trans Chute Assembly Tray Link Retard Pad Figure 2 19 Registration Mechanism 1 Tray Retard Pad Upper Figure 2 20 Registration Mechanism 2 Rev 2 11 ...

Page 64: ...transported to by and drum The and drum through paper is vacuumed to trans chute assembly side by air for chute fan Protect of paper is so that the chute fan vacuum the paper to trans chute side Chute Fan Inlet Chute Solenoid Pick up Sensor Bottom Plate Figure 2 21 Paper Transfer Rev 2 12 ...

Page 65: ...d is fed to the output tray The exit sensor is beyond the pressure roll and the heat roll in the paper path The engine controller MC PWB detects by the exit sensor that paper has been delivered Exit Roller Rod Figure 2 22 Paper Exit Section Pinch Roller Pressure Roller r Figure 2 23 Paper Exit Mechanism Rev 2 13 ...

Page 66: ...B BOARD BOARD ROS UNIT AC IN Thermal Fuse Scanner Motor Sensor FEEDER SENSOR Thermistor II Feed L 1 TURN Solenoid Clutch I i Toner Sensor Not Paper out Sensor Sensor EXIT Sensor MSI Sensor Paper Size Sensor I Optional 2rrd FEEDER Solenoid I Chute Fan 1 Feed solenoid Turn Solenoid Detach Saw 1 BTR OPC Drum Paper out Sensor Charge 1 1 1 Paper Size Sensor Magnet Roll Fan DRIVE Main Motor Figure 2 24 ...

Page 67: ... time of sensor while paper is feeding This time is long while longer paper is feeding This time is short while shorter paper is feeding One function is paper jam and feed jam detecting to combine for exit sensor If the sensor does not turn on at paper feeding it will be judged feed jam The feed jam is the condition that a paper jam has occurred in the feed process If the following conditions are ...

Page 68: ...ature by the HEATER ROD ON signal standby mode temperature is 147 degrees C normal paper printing mode is 152 degrees C and envelope printing mode is 170 degrees C When paper size is set to DL or COM 10 the engine controller board MC sets the temperature to envelope printing mode ine Controller Board Low Voltage Supply Board TEMP HEATER ROD ON PIJ11 13 1 AC AC 1 Thermistor Thermostat Thermal Fuse ...

Page 69: ...uts power if the temperature of the fusing section rises toanabnormallyhigh level over 220 degrees C and the thermostat did not move 2 1 3 4 Scanner Motor Control Figure 2 29 is the scanner motor control circuit The scanner motor is driving while the scanner motor receives the SCANNER MOTOR ON signal and are scanner motor rotating speed setting signals The printing resolution of this printer is 60...

Page 70: ...n it is LOW the laser is allowed to emit and when it is HIGH the laser is stopped The MO is the laser emission power monitor analog signal The engine controller board MC adjusts the laser emission power by and VLl signals and are laser emission power adjust signals they are analog signals If the signal is not detected it will be judged that there ia a laser diode malfunction If the SOS signal is n...

Page 71: ...nsfer roller is charged to The control to drum charge and DETACH SAW bias While this signal is LOW the DETACH SAW is charged to and the drum is charged The imaging cartridge has charged screen between charge wire for drum and drum The charge screen is connected 310 diode The charge screen control potential of drum surface to 310 The signal control to developing bias While this signal LOW the devel...

Page 72: ...rom the engine board MC during and the high voltage supply board sends CHUTE FAN ON signal to chute fan and FAN to fan during printing The fan rotates faster while FAN FAST ON receive chute fan rotates while CHUTE FAN ON signal receive The fan output FAN ALARM signal while it is locked Engine Controller 24 FAN CONTROL FAN High Voltage y o x Front Frame Assembly CHUTE FAN ON Chute Fan o M Fan 1 0 M...

Page 73: ...r Option only O No paper cassette OFF OFF OFF OFF 0 275 to 0 293 MONARCH OFF OFF OFF ON 0 554 to 0 583 LEGAL 13 OFF OFF ON OFF 0 834 to0 871 Japan Post Card OFF OFF ON ON 1 116 to 1 157 COM 10 OFF ON OFF OFF 1 396 to 1 445 USA or OFF ON OFF ON 1 680 to 1 730 A4 Other C5 OFF ON ON OFF 1 962 to 2 015 DL OFF ON LEGAL 14 ON OFF EXECUTIVE USA or ON OFF B5 Other B4 ON OFF OFF ON 2 814 to 2 868 1 OFF 3 0...

Page 74: ...oard Figure 2 33 Imaging Cartridge Sensor 2 1 3 10 Power Supply Circuit Function and Safety Protection This printer s low voltage supply board supplies 5 and 24 24 is used bias voltages supply main motor drive polygon scanner motor drive fan motor drive and solenoid drive The 24 line is cut while interlock switch open switch is off It s a safety protection interlock Low Voltage switch Board Figure...

Page 75: ...on 0 Control Panel Figure 2 35 Video Controller Section 2 2 1 MAIN Board Operation Figure 2 36 shows a block diagram of the MAIN board The MAIN board contains the video controller which consists of a 19 2 MHz 32 bit bus CPU the standard cells developed for this printer DRAMs ROM and a CPU ICI ROM ROM Option 15 or Board 30 1 A 1 I T 1 ADDRESS DATA CONTROL 1 I 1 7 Data Address Type B Specific Figure...

Page 76: ...rocessing EMGTech This contains the functions Video interface interface interface interface LocalTalk module control Type B interface card control Control panel control 8M ROMs or IC1615 or These ROMs are code ROM four 4M ROMs Two ROMs 30 These ROMs are font ROM BM ROM This ROM is language ROM fonts option This stores the Model type Printed page counter value Toner life counter value Jam counter v...

Page 77: ... 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 by using setting PAGE PROTECT The transmits image data stored in the V RAM to The changes image the data format from 32 bits parallel data to serial data and stores it in the internal temporary buffer The temporary buffer has a equivalent to several lines Th...

Page 78: ...evel less than 4 25 V is detected reset time is approximately 128 ms L OUT c 4 Figure 2 38 Reset Circuit 2 2 1 2 Bus Circuit The CPU outputs the R W read write signal AS address strobe signal and the BE BE1 BE2 and BE3 signals byte to the The uses these signals to generate the RD read strobe signal WR write strobe signal and READY signal ICI u AS CPU BE 3 WR Bus Bus Figure 2 39 Bus Control Circuit...

Page 79: ...upt 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 four 512K x DRAMs are mounted in locations and providing a total of 2 0 MB SIMM sockets number and number 2 are optional SIMM sockets These SIMM sockets can use 1 2 4 8 16 32 MB SIMM 32 bit bus The DRAMs including optional are managed by the E05A91 The handles the man...

Page 80: ...he BUSY signal after reading the data from the so that the printer is ready to receive more data from the host computer b Latch 1 Figure 2 41 Parallel Interface Circuit 2 2 1 6 Circuit This circuit uses the receiver driver to change the signal level the signal level 12 or to the signal level O V or 5 V or from the signal level to the signal level converts 5 to 12 and 12 The standard cell changes s...

Page 81: ...t The LocalTalk is an optional I F board It uses three ICI and The changes parallel data to serial data or serial data to parallel data It is controlled by at the C135 MAIN board The and the which are signal level change changes a TTL signal level to a LocalTalk signal level compatible with signal level Cl 35 MAIN Board CN7 Data Bus Address Bus l F Board Option CN1 LocalTalk DTR RxD 4 CTS Figure 2...

Page 82: ...ace the MAIN board and engine controller board can be broadly divided into four groups The first group PRINT RDY and PRD gives the status of either the video controller or engine and indicates whether they are ready to communicate with each other or ready to start the printing operation second group TOP is the synchronizing signal for the printing operation The third group VIDEO is the serial vide...

Page 83: ...der Assembly Removal and Disassembly 3 2 3 1 Feeder Assembly Removal 3 2 3 2 Feed Solenoid Removal 3 2 3 3 Turn Solenoid Removal 3 2 3 4 Feed Roller Assembly Removal 3 2 3 5 Feed Roller Removal 3 2 3 6 Turn Roller Removal 3 2 3 7 Paper out Actuator Lever Removal 3 2 3 8 FEEDER PWB Board Removal 3 2 3 9 Size Spring Removal 3 2 4 Paper Section Disassembly 3 2 4 2 3 2 4 3 3 2 4 4 3 2 4 5 3 2 4 6 3 2 ...

Page 84: ...mbly Figure 3 15 Removing the Solenoid Figure 3 16 Removing the 3 12 Figure 3 17 Removing the Feed Roller Assembly 313 Figure 3 18 Removing the Feed Roller Figure 3 19 Removing the Roller Assembly Figure 3 20 Removing the Paper out Figure 3 21 Removing the Board Figure 3 22 Removing the Figure 3 23 Removing the 316 Figure 3 24 Removing the 16 Figure 3 25 Removing the Figure 3 26 Removing the Figur...

Page 85: ...Figure 3 45 Removing the Exit Actuator 3 28 Figure 3 46 Removing the Drive Unit Figure 3 47 Removing the CRU SENSOR PWB Board Figure 3 48 Removing the Erase Lamp 3 30 Figure 3 49 Removing the ROS Unit 3 32 List of Tables Table 3 1 Tools Table 3 2 Screw Abbreviations 3 2 Table 3 3 Screw and Washer Types 3 2 Table 3 4 3 3 ...

Page 86: ... If the imaging cartridge is the printer do not place it in sunlight Do not disassemble the optical unit Never turn power on if the optical unit is not installed To prevent damage to static electricity do not touch the on the circuit board or the terminals of peripheral electrical components with your hands only the recommended tools to ensure safe and efficient maintenance work Inappropriate tool...

Page 87: ...breviations Abbreviation Part Name CB Cross recessed Bind head Cross recessed Bind head B tite CBS 0 Cross recessed Bind head with Outside toothed lock washer CP Cross recessed Pan head I Cross recessed Pan head with Spring lock washer and 1 Plain washer CPFS Cross recessed Pan Flange head Table 3 3 Screw and Washer Types Head Body washer Top Side assembled 1 Gross recessed 1 Normal washer head 2 ...

Page 88: ...nt Check Point Check Do all LCD and buttons function normally Does the heater lamp turn on normally Is the test print performed I Do cartridge fonts print on font sample printing Does data print in all modes Is it the latest version Are toner and dust removed from the paper path Is the lens on the optical unit clean Is the paper take up roller clean Is the outer surface of the printer clean Is the...

Page 89: ...complished by performing disassembly in reverse 3 2 1 Housing Removal section describes how to remove the rear top left and right covers 3 2 1 1 Rear Cover Removal 1 Remove the option cover 2 1 CBB x 8 securing the top cover 3 Remove 1 screw x 8 securing the rear cover and remove it Figure 3 1 Removing the Rear Cover 3 2 1 2 Top Cover Removal 1 Remove the rear cover Refer to Section 2 Remove 4 scr...

Page 90: ...Refer to Section 3 Remove 1 CB screw x 8 securing the left cover and remove it Figure 3 3 Removing the Left Cover 3 2 1 4 Right Cover Removal 1 Remove the rear cover Refer to Section 3 2 1 1 2 Remove the top cover Refer to Section 3 2 1 2 3 Remove 1 screw x 8 securing the right cover and remove it Figure 3 4 Removing the Right Cover Rev 3 5 ...

Page 91: ...3 2 2 1 Cover Removal 1 Remove the rear cover Refer 2 Remove the top cover Refer to Section 3 Remove theleftcover Refer to Section 3 2 13 4 Remove the right cover Refer to Section 5 Remove 18 screws x 6 securing the shield cover and remove it 6 7 Figure 3 5 Removing the Shield Cover and from the MAIN board Remove 8 CB screws x 6 and 2 CBB screws x 8 securing the cover and remove it Figure 3 6 Remo...

Page 92: ...fer to Section 3 2 2 1 Steps 1 to 5 Remove 2 CP screws x 6 securing the font cartridge connector and remove it Remove 3 screws x 6 securing the font guide and cover and remove them Remove 2 screws x 6 securing the option interface cover and remove it Remove the option interface guide Remove 4 screws x 6 2 serial interface connector screws and 2 small screws from the rear shield cover and remove it...

Page 93: ...ecuring the engine driver board and remove it Figure 3 8 Removing the Board 3 2 2 4 High Voltage Board Board Removal 1 2 3 4 5 6 7 8 Remove the rear cover Refer to Section 3 2 1 1 Remove the top cover Refer to Section 3 2 12 Remove the Refer to Section 3 2 13 Remove the right cover to Section 3 2 1 4 Remove the ELEC cover Refer to Section 322 1 P Jill DS TR and from the Remove the volume adjustmen...

Page 94: ...efer to Section 3 2 2 1 Disconnect the connector board 6 on the Remove 3 screws x 6 securing the box and remove it and the board Remove the fusing unit Refer to Section 3 2 5 1 Figure 3 10 Removing the Box Remove 1 CB screw x 6 securing the earth wire of the HVPS board to the unit Remove 2 CBB screws x 10 securing the ROS unit and remove connector P101 of the fusing unit Remove 2 CB screws x 6 and...

Page 95: ...e screw x 6 securing the earth wire of the earth plate on the LVPS unit Remove the link assembly Refer to Section 3 2 4 1 Remove 2 screws x 8 securing the earth plate and remove it Figure 3 12 Removing the Earth Plate 3 2 2 7 Fan Unit Removal 1 Remove the rear cover Refer to Section 2 Remove the top cover Refer to Section 3 Remove the Refer to Section 3 2 13 4 Remove the right cover Refer to Secti...

Page 96: ...2 3 1 Feeder Assembly Removal 1 Remove the paper cassette and imaging cartridge 2 Turn the left cover over Place the left cover on a cloth so that it will not be damaged 3 Remove 4 CB screws M3 x 8 securing the feeder assembly from the back side and remove it 4 Discomect comector from the FEEDER PWB board PIJ115 Figure 3 14 Removing the Feeder Assembly Rev 3 11 ...

Page 97: ...i connector from the FEEDER board Remove 1 saew x 8 securing the feed solenoid and remove it 01 Figure 3 15 Removing the Feed Solenoid 3 2 3 3 Turn Solenoid Removal 1 Remove the paper cassette and imaging cartridge 2 Remove the feeder assembly Refer to Section 3 Remove 2 x 8 securing the feeder tie plate and remove it 4 2 screws x 8 and 2 x 8 securing the feed housing right and remove it 5 Remove ...

Page 98: ...using right and remove it 5 Remove the GEAR IN and GEAR OUT 6 Remove the E ring left securing the feed roller assembly and remove it Figure 3 17 Removing the Feed Roller Assembly 3 2 3 5 Feed Roller Removal 1 Remove the paper cassette and imaging cartridge 2 Remove the feeder assembly Refer to Section 3 2 3 1 3 Push the plastic face of the feed roller while holding the shaft of the feed roller ass...

Page 99: ...t 5 Remove 1 E ring securing the turnroller assembly and remove it Figure 3 19 Removing the Turn Roller Assembly 3 2 3 7 Paper out Sensor Lever Removal 1 Remove the paper cassette and 2 Remove the feeder assembly Refer 3 23 1 3 Remove 2 screws x 8 securing the feeder tie plate and remove it 4 securing the feed housing right and remove it 5 Remove 1 link securing the paper out actuator 6 Remove act...

Page 100: ... 2 screws x 8 securing the FEEDER board and remove it Disconnect comectors and from the FEEDER board Figure 3 21 Removing the FEEDER Board 3 2 3 9 Size Spring Removal 1 Remove the paper cassette and imaging cartridge 2 Remove the feeder assembly Refer to Section 3 2 3 1 3 Remove 2 screws x 8 securing the feeder tie plate and remove it 4 Remove 2 screws x 8 and 2 CB screws x 8 securing the feed hou...

Page 101: ...4 inches towards the front 4 Open the front cover unit Remove the shatter lever 6 Remove 2 CBB screws x 8 securing the link assembly and remove it from the ROS unit frame 7 Remove the link assembly while opening the Shatter Lever Figure 3 23 Removing the Link Assembly 3 2 4 2 Roll Assembly Removal front 2 Disconnect connectors P J26and from the roll assembly 3 Remove 3 screws x 8 securing the asse...

Page 102: ...emove the roll assembly Refer to Section 3 2 4 2 3 Remove 4 CBB screws M3 x 8 securing the lower chute assembly and remove it Figure 3 25 Removing the Lower Chute Assembly 3 2 4 4 Assembly Removal Never touch the surface of the 1 Open the front cover 2 Remove the Figure 3 26 Removin the Assembly Rev 3 17 ...

Page 103: ...efer to Section 3 2 1 4 Remove the ELEC cover Refer to Section 3 2 2 1 Remove the link assembly Refer to Section 3 2 4 1 Disconnect connector from the MCU PWB board connector from the EXIT sensor on the fusing unit and from the Remove screw x 6 securing the earth wire to the front frame Figure 3 27 Removing the Front Cover 1 Remove 2 screws x 6 securing the front cover and remove it Remove the ret...

Page 104: ...moving the Retard Pad 3 2 4 7 Trans Chute Assembly Removal 1 2 3 5 Open the front cover Remove the BTR assembly Refer to Section 3 2 4 4 Disconnect from the chute fan Remove 4 CPFS screws x 10 securing the trans chute assembly Remove 2 screws x 8 securing the wire of the trans chute assembly Figure 3 30 Removing the Trans Chute Assembly ...

Page 105: ...p Roller Assembly 3 2 4 9 Pick up Solenoid Removal 1 Remove Refer to Section 3 2 1 2 2 Remove Refer to Section 3 Remove the Refer to Section 3 2 4 4 4 Remove thetrans chute assembly Refer to Section 3 2 4 7 5 Remove Refer to Section 6 Remove 5 screws x 8 securing the front frame assembly to front rover 7 Remove thepick up roller assembly Refer to Section 3 2 4 8 8 Remove 1 screw x 8 securing the p...

Page 106: ...ect connector from the sensor Figure 3 33 Removing the Sensor 3 2 4 11 Bottom Plate Removal 1 2 3 4 5 6 7 8 Remove the top cover Refer to Section 3 2 1 2 Remove the left cover Refer to Section 3 2 1 3 Remove the BTR assembly Refer to Section 3 2 4 4 Remove the trans chute assembly Refer to Section 3 2 4 7 Remove the link assembly Refer to Section 3 2 4 1 Remove 5 screws x 8 securing the front fram...

Page 107: ...Remove the trans chute assembly Refer to Section 32 4 7 Remove the link assembly Refer to Section 3 2 4 1 Remove 5 CBB screws x 8 securing the front frame assembly to the front rover connector from the control panel and remove the panel while pushing 2 hooks 3 35 Removing the Control Panel 3 2 4 13 Tray Removal the tray 2 Remove the tray from the left side Figure 3 36 Removing the Tray 3 22 Rev ...

Page 108: ...uring the fusing unit and remove it Figure 3 37 Removing the Fusing Unit 3 2 5 2 Pressure Roller Removal 1 Remove the top cover Refer to Section 3 2 1 2 2 Remove the fusing unit Refer to Section 3 Remove 2 screws x 8 securing the fusing unit top cover and remove it 4 Remove 2 screws x 8 securing the fusing unit cover R and remove it 5 Remove 2 screws x 8 securing the fusing unit cover L and remove...

Page 109: ...r and remove it 4 Remove 2 screws securing the exit chute and remove it Figure 3 39 Removing the Exit Chute 3 2 5 4 Exit Roller Removal 1 Remove thetopcover Refer to Section 2 Remove the fusing unit Refer to Section 3 Remove 2 screws x 8 securing the fusing unit top cover and remove it 4 Remove 2 E rings securing the exit roller and remove it Figure 3 40 Removing the Exit Roller 3 24 Rev ...

Page 110: ...e the eject chute Refer to Section 3 2 5 3 Remove 2 screws x 8 securing the fusing unit cover R and remove it Remove 2 screws x 8 securing the fusing unit cover L and remove it Remove the sensor cover and remove saew x 10 securing the thermistor and remove the thermistor Remove 1 screw x 8 securing the earth wire Remove 1 screw x 6 securing connector Remove 2 screws x 8 securing comector Remove 1 ...

Page 111: ...ve 2 screws x 8 securing the fusing unit cover R and remove it Remove 2 screws x 8 securing the fusing unit cover L and remove it Remove the pressure roller Refer to Section 3 2 5 2 Remove the eject chute Refer to 3 25 3 Remove the heater Refer to Section 3 2 5 5 Remove the H R ring securing the right side of the heat roller and remove the H R gear Remove the heat roller along with the left H R ri...

Page 112: ... 2 screws x 8 securing the fusing unit top cover and remove it Remove 2 screws x 8 securing the fusing unit cover R and remove it Remove 2 screws x 8 securing the fusing unit cover L and remove it Remove the pressure roller Refer to Section 3 2 5 2 Remove the eject chute Refer to Section 3 2 5 3 Remove the heater Refer to Section 3 2 5 5 Remove the heat roller Refer to Section 3 2 5 6 Remove 2 scr...

Page 113: ...Remove the exit sensor Figure 344 Removing the Exit Sensor 3 2 5 9 Exit Actuator Removal 1 Remove the top cover Refer to Section 2 Remove the fusing unit Refer to Section 3 Remove chute Refer to Section 3 2 5 3 4 Remove the exit roller Refer to Section 325 4 5 Remove the exit actuator and spring Figure 3 45 Removing the Exit Actuator 3 28 Rev ...

Page 114: ...rear cover Refer to Section 2 Remove the top cover Refer to Section 3 Remove the left cover Refer to Section 4 Remove the Refer to Section 3 2 l 4 5 Remove the ELEC cover Refer to Section 6 Remove the fusing unit Refer to Section 7 connector from theengine driver board board 8 Remove 3 screws x 29 and screw x 12 securing the drive unit and remove it Figure 3 46 Removing the Drive Unit Rev 3 29 ...

Page 115: ...to Section 7 Disconnect connector from the sensor 8 2 x 8 securing the sensor it 9 Remove x8 securing the sensor board and remove it Figure 3 47 Removing the SENSOR Board 3 2 6 3 Erase Lamp Removal 1 Remove therear cover Refer to Section 2 Remove the fusing unit Refer to Section 3 Remove 3 screws x 8 securing the erase lamp and remove it 4 ect the connector from the erase lamp I Figure 3 48 Removi...

Page 116: ...3 2 1 1 2 Remove the top cover Refer to Section 3 Remove cover Refer 3 2 1 3 4 Remove theright cover Refer to Section 5 Remove the ELEC cover Refer to Section 6 Remove the fusing unit Refer to Section 7 Disconnect all from the engine driver board 8 Remove 2 screws x 6 securing the box and remove the box and the engine driver board 9 Remove the high nit Refer to Section 3 2 2 4 10 Remove thelink as...

Page 117: ...Disassembly and Service Figure 3 50 Removing the ROS Unit 3 32 Rev ...

Page 118: ...Chapter 4 Adjustments Adjustment is required in this product ...

Page 119: ...GING CARTRIDGE 5 10 Table 5 16 The LCD Displays INSERT PAPER TRAY 5 10 Table 5 17 The LCD Displays SERVICE REQ 5 10 Table 5 18 The LCD Displays SERVICE REQ Table 5 19 The LCD Displays SERVICE REQ 5 10 Table 5 20 The LCD Displays SERVICE REQ Table 5 21 The LCD Displays SERVICE REQ EO014 5 11 Table 5 22 The LCD Displays SERVICE REQ COO03 Table 5 23 The LCD Displays SERVICE REQ COO07 5 11 Table 5 24 ...

Page 120: ...er mirror motor error error Laser light error EO014 Communication error for engine controller and video controller CPU error reserved Video CPU error privilege violation controller CPU error illegal instruction error CPU error no support FPU instruction CPU error address miss alignment CPU error reserved Coolo CPU error tag overflow to 31 CPU error no support interrupt CO036 CPU error no support c...

Page 121: ...PAPER OUT The paper is loaded in the standard cassette but the LCD PAPER OUT ILLEGAL CART The LCD displays ILLEGAL CART 5 9 The LCD FEED JAM when using the tray 5 1o FEED JAM The LCD displays FEED JAM when using the standard paper cassette 5 11 The LCD displays FEED JAM when using the optional paper cassette 5 12 The LCD displays PAPER JAM at 5 13 PAPER JAM The LCD displays PAPER JAM during paper ...

Page 122: ...e bad 2 The board may be bad Checkpoint Finding Solution Is connector 1 on the Connect 1 on board Yes the disconnected board With the power on is there an output of 5 VDC between pin Replace the 6 and pin 7 for unit the board Replace the board Table 5 4 The Printer Does Not Start RAM Check cause Step Checkpoint Finding Solution The video controller board If you change the MAIN MAIN board maybe 1 b...

Page 123: ...may be illegal Check the 1 Can this printer use the No Replace with a guide inserted cartridge supported cartridge The cartridge may be bad 2 Does this printer recognize Replace the another legal cartridge cartridge Cl 35 MAIN board 3 Replace the bad MAIN Table 5 10 The LCD Displays FEED JAM 1 Cause The pick up solenoid coil be open or shorted step Checkpoint Disconnect connector on the board and ...

Page 124: ... Pin 5 Pin 2 Pin 4 Pin 2 Pin 6 Are the resistances of all four points approximately 8 The main motor coil may be ohms 2 or shorted If any coil is shorted check the main motor drive circuit using the following procedure 1 Set the to resistance check mode 2 Place the terminal of the on pins 3 5 4 or 6 of connector Yes Replace the P J14 on the board board 3 Place the terminal of the on pin 8 of conne...

Page 125: ...Replace the feed the on pin 2 solenoid and the of connector on FEEDER the FEEDER board board 3 Place the terminal of the on Does the detect any current Disconnect connector on the FEEDER board and check the coil resistance between pin and pin 2 on the No Replace the turn disconnected cable side of solenoid the connector using a Is the resistance approximately 220 ohms turn solenoid coil may If the...

Page 126: ...total on the disconnected cable side of the connector using a Pin 1 Pin 3 Pin 1 Pin 5 Pin 2 Pin 4 Pin 2 Pin 6 Are the resistances of all four points approximately 8 ohms If any coil is shorted check the main motor drive circuit using the following procedure 1 Set the resistance check mode 2 Place the terminal of the on pins 3 5 4 or 6 of connector on the board 3 Place the terminal on pin 8 of conn...

Page 127: ...f the on pin 2 of connector on the FEEDER board 3 Place the terminal of the on Does the muttimeter detect any current connector on the FEEDER board and check the coil resistance between pin 1 and pin 2 on the disconnected cable side of the connector using a Is the resistance approximately 220 ohms If the is shorted check the solenoid drive circuit using the procedure below 1 Set the for resistance...

Page 128: ...y 8 main motor coil may be ohms or shorted If any coil is shorted check the main motor drive circuit using the following procedure 1 Set the to resistance check mode 2 Place the terminal of the on pins 3 5 4 or 6 of connector Yes Replace the on the board board 3 Place the terminal on pin 8 of connector 1 on the board Does the detect any current The board maybe 3 Replace the bad board The sensor ma...

Page 129: ...ause Step Checkpoint Finding Solution The FEEDER Replace the bad FEEDER Table 5 17 The LCD Displays SERVICE REQ cause Step Checkpoint Finding Solution The thermistor may be bad 1 Does the LCD display an Yes Replace the error at thermistor The heater lamp may be 2 Check the heater lamp Is it Replace the heater bad lamp The thermal fuse in the Check the thermal fuse with Replace the fusing unit may ...

Page 130: ...Solution The Cl 35 MAIN board may Replace the be bad MAIN board Table 5 24 The LCD Displays SERVICE REQ Cause Step Checkpoint Finding Solution The optional SIMM may be Is operation OK after you remove the optional Yes Replace the optional bad SIMM SIMM MAIN board Replace the be bad MAIN board Table 5 25 The LCD Displays SERVICE REQ CII1O Cause Step Checkpoint Finding Solution ROM on the Is operati...

Page 131: ...lace the ROM or on the bad MAIN board The Cl 35 MAIN Replace the be bad MAIN board Table 5 30 The LCD Displays SERVICE REQ Cause Step Checkpoint Finding Solution ROM IC13 or IC15 on the Is operation OK after Replace ROM MAIN board maybe you replace the ROM or IC15 on the bad MAIN board The MAIN board Replace the be bad MAIN board Table 5 31 The LCD Displays SERVICE REQ Cause step Checkpoint Findin...

Page 132: ...ding Solution Replace the optional interface card Replace the MAIN board Table 5 36 The LCD Displays SERVICE REQ CI31O Cause Step Checkpoint Finding Solution The optional interface card Remove the optional and LocalTalk 1 interface card module are used The optional interface Replace the optional may be bad interface card The MAIN board may 3 Replace the be bad MAIN board Table 5 37 The LCD Display...

Page 133: ...NTER charging board the board PRINTER Window of Check the unit is the optical Poor image transfer Replace the roller Blank print Window of optical unit is dirty Optical unit the window Imaging Replace the imaging Poor Cartridge cartridge development board Replace the board Poor image board Replace the board transfer Replace the roller Black print board Replace the board Improper charging Imaging R...

Page 134: ...rtridge Dirt on the Fusing Replace the fusing roller roller Paper feed is bad Drive unit Replace the drive unit line Window of optical Optical unit unit is dirty Clean the window Poor image transfer roller Replace the roller Imaging Replace the imaging TER cartridge cartridge Clean the charge wire Improper Charge wire of the imaging charging cartridge Refer to chapter 6 paper separation Trans chut...

Page 135: ... dots Poor image transfer roller Replace the PRINTER Imaging Replace the imaging cartridge cartridge Dirt on the fusing Fusing roller Replace the fusing roller roller Ghost Erase lamp is Erase lamp Replace the erase bad lamp Poor image transfer roller Replace the Imaging Replace the imaging cartridge cartridge Dirt on the Fining Replace the fusing roller roller background Erase lamp is Erase lamp ...

Page 136: ...Replace the trans may be bad unit chute unit Dirt on the fusing Fusing roller Replace the fusing roller roller creases Paper cassette Paper cassette Replace the paper may be bad cassette Imaging cartridge Imaging Replace the imaging may be bad cartridge cartridge Trans chute unit Trans chute Replace the trans may be bad unit chute unit Dirt on the fusing Replace the fusing roller roller fusing Pap...

Page 137: ...leaning 6 5 List of Figures Figure6 l lntemal Cleaning Figure 6 2 Charge Wire Cleaning 1 6 2 Figure 6 3 Charge Wire Cleaning 2 6 2 Figure 6 4 Imaging Cartridge Replacement 1 6 3 Figure 6 5 Imaging Cartridge Replacement 2 6 3 Figure 6 6 Imaging Cartridge Replacement 3 6 4 Figure 6 7 Imaging Cartridge Replacement 4 6 4 Figure 6 8 Imaging Cartridge Replacement 5 6 5 List of Tables Table 6 l Fusing Un...

Page 138: ...d repair personnel 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 external cleaning and the cleaning of the optical lens and charge wire for optimal print quality External Cleaning Be sure to disconnect the printer from the power outlet before cleaning Wipe the cover and other external parts ...

Page 139: ...e three layers in the imaging cartridge and the slots in the middle layer each slot in the middle by pushing the tool into the slot as as it will go and moving it several times from side to side as shown in Figure 6 3 Figure 3 Charge Cleaning 2 4 When you finish cleaning all four slots in the middle layer reinstall the imaging cartridge m the printer 6 2 Rev ...

Page 140: ...there is less than of the toner left you should replace the imaging cartridge Imaging Cartridge Replacement 1 Make sure the printer is turned off 2 Gently open the printer cover and remove the imaging cartridge by pulling it towards you 3 Dispose of the used imaging cartridge with non burnable iterns 4 Remove the new imaging cartridge from its aluminum bag While holding the cartridge horizontally ...

Page 141: ...and FULL appear alternately on the display for about 10 seconds Press Enter while these messages appear READY then appears on the display Note You must press Enter while the WARMING UP and FULL messages appear so 9 10 11 that the TONER option m will register correctly After READY appears on the display press Menu once and then press ALT and Menu together once TEST MENU then appears Press Item seve...

Page 142: ...t Service The fusing unit requires periodic service because it is subject to functional deterioration as the total number of printed pages increases resulting in bad print quality The recommend service internal for the fusing unit is approximately 100 000 pages This interval is only a suggested value You do not need perform service exactly at this interval The fusing unit is maintained by cleaning...

Page 143: ...omponent layout Rear Side of Tables Table A 1 Board Connector Summary A 3 Table A 2 Pin Assignments Table A 3 Table A 4 Table A 5 Table A 6 Table A 7 Pin Assign ments Pin Assignments Pin Assignments Pin Assignments Pin Assignments Table A 8 CN11 Pin Assignments Table A 9 Pin Assignments Table A 10 P Jl 1 Pin Assignments Table A 1 1 Pin Assignments Table A 12 Pin Assignments Table A 13 Pin Assignme...

Page 144: ...rconnection of the primary components Table A 1 gives the size and a description of each connector L HP Font Cartridge H Parallel l F Option l F EpsonScript Level 2 Board LocalTalk Module C135 MAIN SIMM SIMM Serial l F MCU PWB Control Panel 1 LVPS Figure A 1 Cable the Video Controller Rev A A 1 ...

Page 145: ...Appendix Service 7 5 4 1 w 2 1 2 3 4 7 w mol r 4 MN 7 n 111 FAN 4 Figure A 2 Cable Connections for the Engine Section Rev ...

Page 146: ... Controller Board Board PIJ11 Connector for low voltage supply unit 14 pins Table O Connector for unit 13 Table A 1 1 Connector for FEEDER board 12 pins Table A 1 2 Connector for main motor 6 Table A 1 3 5 Connector for board 11 pins Table A 1 4 Connector for exit sensor MSI sensor and pick up solenoid pins Table A 1 5 Connector for clutch toner sensor and sensor 11 pins Table 6 Connector for CRU ...

Page 147: ... bit 1 Data bus bit 17 Data bus bit 2 Data bus bit 18 Data bus bit 3 Data bus bit 19 5 Not connected Memory address bit O Memory address bit Memory address bit 2 Memory address bit 3 Memory address bit 4 Memory address bit 5 Memory address bit 6 Memory address 10 Date 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 addre...

Page 148: ...ata bus bit 25 53 Data bus bit 10 54 Data bus bit 26 55 Data bus bit 11 56 Data bus bit 27 57 Data bus bit 12 58 Data bus bit 28 59 5 VDC 60 Data bus bit 29 61 Data bus bit 13 62 Data bus bit 30 63 Data bus bit 14 64 Data bus bit 31 65 Data bus bit 14 66 NC Not connected 67 Pol Not used 68 Not 69 Not used 70 Not used 71 NC Not connected 72 Ground Rev ...

Page 149: ...Address bus bit 12 Address bus bit 14 Address bus bit 16 Address bus bit 18 Address bus bit 20 Data bus bit Data bus bit 3 Data bus bit 5 Data bus bit 7 Data bus bit 9 Data bus bit 11 Data bus bit 13 Ground 5 Upper data strobe Address decode Ground Address bus bit 1 Address bus bit 3 Address bus bit 5 Address bus bit 7 Address bus bit 9 bus bit 11 Address bus bit 13 Address bus bit 15 Address bus ...

Page 150: ...6 Signal Name TXD READY RXD NC RESET WR GND A3 AO o 0 o 0 I I I o 0 0 o Description 5 VDC Transmitted data Ready signal Received data Not connected Reset signal l F disabled Request command l F ready Data read request Wriie enable Read enable Chip select Ground Address bus bit 3 O Data bus bit 7 O Rev A 7 ...

Page 151: ...bit 2 23 24 Ground 25 A5 o Address bus bit 5 26 A6 o Address bus bit 6 27 A3 o Address bus bit 3 28 A4 o Address bus bit 4 29 o Address bus bit 9 30 o bus bit 10 31 A7 o Address bus bit 7 32 A8 o Address bus bit 8 33 o Address bus bit 13 34 o Address bus bit 14 35 1 0 Address bus bit 11 36 o Address bus bit 12 37 o Address bus bit 17 38 o Address bus bit 18 39 o Address bus bit 15 40 o Address bus...

Page 152: ...n select 1 Not connected Read strobe Not connected Clock from CPU Not connected identification O Board identification 1 Not connected Video clock Reset signal Option select O 5 VDC Initialize signal from the option Video NMI signal TOP signal for video l F Ground Video out Not connected Reset in signal for video l F 5 Not connected Ground Data bus bit 18 Data bus bit 19 Data bus bit 16 Data bus bi...

Page 153: ...les 2 Byte enables 3 Option ready Interrupt request bus bit O Interrupt request bus bit 1 request bus bit 2 Interrupt request bus bit 3 CPU ID bit CPU ID bit O Table A 6 Pin Assignments Signal Name DTCT DREQ DB7 DB6 DB5 DB4 DB3 DB2 DB1 DBO o 0 0 0 0 0 0 0 0 0 o 0 0 I o I o I o Description 5 VDC Interrupt interrupt Reset signal Address bus bit 4 Address bus bit 3 Clock to option Data request Write ...

Page 154: ...ontroller ready 17 CMD o Command 18 Ground 19 Ground 20 Ground Table A 8 Pin Assignments Pin No Signal Name I o Description 1 LCDCLK o System clock 2 o LCD data read 3 I Switch interrupt 4 Ground 5 LCDX o Select of LCD 6 Al I Address bit 1 7 LEDX o LED data 8 SWRDX o Switch data read 9 NC Not connected 10 LCDWRX o LCD data write 11 DBO Data bus bit O 12 DB7 Data bus bit 7 13 DB6 1 0 Data bus bit 6...

Page 155: ...r temperature Signal Name DATA MO SG SG S M ON o o 0 o 0 Description Laser diode data 5 Output level of laser diode Laser diode power adjustment 2 Laser diode power adjustment Ground 5 Scanner motor speed control 2 Scanner motor speed 2 Ground motor on 24 Table A 12 Pin Assignments Signal Name SG 1 T S I o 0 o 0 No paper of 1 et cassette 5 No paper of 2nd cassette Ground Paper size of Ist cassette...

Page 156: ...nsfer bias on Transfer bias control Development bias on Ground Drum charge on 24 Fan error signal Not connected Table A 15 Pin Assignments Signal Name 1 2VDC SG EXIT S 1 2VDC SG S PICK UPS NC I o Description Sensor power Ground Exit sensor signal Sensor power Ground sensor signal Pick up solenoid on 24 Not connected Table A 16 Pin Assignments Pin No Signal Name 2 o 3 4 NC 5 SG 6 TONER S I 7 I 8 SG...

Page 157: ... Description 1 SG Ground 2 Sos SOS sensor signal 3 5 High Voltage Supply Board Board Table A 19 Pin Assignments Pin NO Name Description Ground 2 FG Frame ground 3 SCREEN o Screen voltage adjustment 4 o Developing bias Table A 20 Pin Assignments Pin No Signal Description FAN FAST o Fan speed control 2 FAN ALARM I Fan error signal 3 24 4 Table A 21 Pin Assignments Pin No Signal Name Description 1 C ...

Page 158: ...Service Manual Appendix r I I 1 1 J u w e 1 I I I 1 I z Figure A 4 Control Panel Board Circuit Diagram Rev A 17 ...

Page 159: ...Appendix Service A 3 CIRCUIT BOARD COMPONENT LAYOUT I 1 9 6 1 4 7 5 C36 3 7 Figure A 5 C135 MAIN Board Component Layout Front Side 8 Rev ...

Page 160: ...Service Manual Appendix 0 c 1 R13 J Figure A 6 C135 MAIN Board Component Layout Rear Side Rev ...

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