Manuals / Oki / Computer Equipment / Printer

Oki 24DX manual 40930701TH Draft Vesion

Models: 24DX

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(1)Image drum unit

The image drum unit consists of a sensitive drum, a charger, and a developer. The unit forms a toner image on the sensitive drum, using a electrostatic latent image formed by the LED head.

(2)Hopping motor

This motor is a pulse motor of 48 steps/rotation that is two-phase excited by the signal from the control board. It drives the hopping roller of the first tray and the front feed roller via two one-way clutches according to the direction of rotation.

(3)Motor-Main

This motor is a pulse motor of 72 steps/rotation that is two-phase excited by the signal from the control board and is the main motor of this mechanism.

(4)Clutch (for Regist)

Swithes the transfer of power to Roller Regist if necessary depending on the power from Motor-Main and instructions from the control PCB.

(5)Clutch (for Feed Roller)

Swithes the transfer of power to Feed Roller if necessary depending on the power from Motor-Main and instructions from the control PCB.

(6)LED head

Image data for each dot line from the control board is received by the shift register and latch register. The 4992 LEDs are driven to radiate the image data to the image drum.

(7)Fuser

The fuser consists of a heater, a heat roller, a thermistor and a thermostat.

An AC voltage from the power supply board is applied to the heater under the control of the HEATON signal from the control board. This AC voltage heats the heater. The control board

supervises the heat roller temperature via the thermistor, and regulates the heater roller at a predetermined temperature (185 °C : Normal paper, MEDIA TYPE = MEDIUM) by connecting or disconnecting the AC voltage supply to the heater.

If the heater roller temperature rises abnormally, the thermostat of the heater voltage supply circuit is activated to cut the AC voltage supply forcibly.

(8)Duplex Unit

Duplex Unit is a unit, which is installed on the printer unit for controlling both-sided printing from the printer unit, intended for automatically reversing paper of which one side have been already printed and re-feeding them to the unit for printing other side.

40930701TH DRAFT Vesion

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Oki 24DX manual 40930701TH Draft Vesion

Contents

Draft Version LED Page PrinterPreface Contents 105 Connector IMSA-9714N-14ALever-Paper end & Lever-Paper near end 101192 Interconnection Diagram 213 PCB Layout 214191 Functions 191 Appearance and Parts NameParts List OKI HSP System ConfigurationShows the printer unit configuration Printer ConfigurationOptional Configuration 40930701TH Draft Vesion Specification Temperature and humidity Safety Standards Shows an OKIPAGE24DX / OKIPAGE24dx block diagram OKIPAGE24DX / OKIPAGE24dx block diagram PS ROM Main Control Board BOARD-FFFProgram/font ROMs PCL ROMMenu EepromLAN ON/X-OFF Rbst X-ONBoard-FSL or Board-FSL-2 4MB 8MB Power Supply Unit OFF Shows the sensor layout diagramLED Head Electro-photographic Process40930701TH Draft Vesion 40930701TH Draft Vesion Paper Eject roller PWM1-P Cluch for hopping PWM2-P Cluch for Registration DMON-N Drum Motor HMON-N Hopping MotorDuplex Unit OFF Paper Tray Printer Printer Stacker Duplex Printing Timing ChartDuplex Unit DUPRSNS-N Rear Sensor inDUPLEX Unit DUPFSNS-N Front SensorHopping Motor Front Feeder Duplex Unit 1st Tray Pressure Roller Regist Roller Start printing. after the paper turns off the Write Sensor 180 FF Cam Micro SW Front Feeder Plate Home position~30 Front Hopping ShaftGear E Clutch Feed Gear D Align Roller Main Motor Power Supply 40930701TH Draft Vesion Image drum Paper Transfer roller Heater Separation Claw Image Drum Cleaning Roller Power Supply Transfer Roller Retracting paper Sending out paper SNS DUPRoller LED LED LED LED LED LED LED STRB4-N STRB3-N DataLSI Eeprom ClockSTRB1-N STRB2-N STRB3-N STRB4-N ReadData Clock LoadSTRB4~1 DirectCPU One side wire-bonding headCorrection Total 5200 clocks LED Correction Data Clock Load DATA3~0 STRB1-N STRB2-N STRB3-N STRB4-N Printing operation timing chart is shown belowPaper Jam Detection Cover Open Stirring Gear Toner Low DetectionT1 2.727/4 727 SEC Toner Full stateToner LOW state SW1 SW2 SW3 SW4 Stacker-full DetectionSize Detection Paper sizePrecautions for Parts Replacement Service Tools Place of use Parts Layout Roller Guide Photo sensor Motor Solenoid Assy This section explains how to below How to Change Parts40930701TH Draft Vesion Unlock this part before removing 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion View a 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion 40930701TH Draft Vesion Pull the Duplex Unit out of the unit Printer Groove PLATE-Earth F/R 40930701TH Draft Vesion 40930701TH Draft Vesion From the results of installation View 40930701TH Draft Vesion 118 CleaningPeriodic Replacing Part 119 120 Troubleshooting TipsPoints to Check before Correcting Image Problems Tips for Correcting Image Problems121 Preparation for TroubleshootingTroubleshooting Flow DUPLEX, Simplex 122Category LCD status message Trouble or status Remedy Received and abandoned until the completion of a job 123124 Manual A4 Size Request 125Load the requested paper in tray 126FFF 127DUP R SNS on ~ DUP F SNS on 128DUP Insns on DUP Insns OFF129 If the error occurs frequently, see chapterTrouble or status Remedy Message 130Category LCD ReadyTrouble or status Remedy 131Category LCD 132Time-out between the printer and the operator panel ERROR74ERROR80 133YES END Printer does not work normally after being turned on134 Message shown in the LCD display? Replace the Main board 135Yes Is InitializingINLETSW1 Power Connector136 137 Replace the Gear ASSY-CLUTCH Z50 JAM error Paper input jam 1st tray138 139 Replace the front feeder paper sensor assemblyPaper input jam front feeder 140 Paper feed jamGo to on the next page a 141142 143 Paper exit jam144 Duplex Input JAM145 Duplex Feed JAM1Duplex Feed JAM Sensor F/R 146Is the Duplex Front sensor lever operating normally? Does the outlet sensor lever operate smoothly Paper size error147 148 Fuser unit error Error 71, Error 72, Error149 150 F time-out between printer and optional tray ErrorF time-out between printer and Duplex Unit Error 151 Message cannot be received through the parallel interface152 Message cannot be received through the serial interfaceOK? Synchronous serial I/O error ErrorData cannot be received through the OKI HSP interface 153Abnormal images 154Replace the image drum cartridge Replace the Main board or Power Supply Unit High VoltageImage are light or blurred a whole 155Enter keys. Set the LED head drive time. Refer to Section Dark background densityBlack paper is output 156Refer to Section Black belts or stripes in the vertical direction157 Enter keys. Set the LED head drive time158 Cyclic error159 Print voids160 Poor fusingYes Replace the LED head Has the trouble been removed? White belts or streaks in the vertical direction161 162 Snowy print of high density patternBlockly faded print 163 164 165 Interconnect Signal DiagramTo Printer Unit 166Main board BOARD-FFF PCB Layout167 168 Power supply board AC120V/230VPower supply board High voltage ROM 169LEX-PCB CPU170 Resistance Check171 Case of EP ROM or OTP ROM Program/Font ROM Location172 Case of Mask ROM 173Printer Unit 174Duplex Unit ODA 175SMCD6X280BDX10BL Frame-Main 176Frame-Main Unit 1/2 177PLATE-FG F 178Frame-Main Unit 2/2 Roller ASS.-BKBase Unit 179GEAR-Z58 180Base Unit 1/2 GEAR-Z38 NK3-16SUSBRACKET-AC 181Base Unit 2/2 182 PULLEY-MXL25 183Duplex Unit 1/2 GEAR-Z40S6NK2-12SUS 184Duplex Unit 2/2 SPRING-SL185 Connector pin arrangementHigh 186LOW 187 Timing charts Compatible mode Data receiving timingOn-line → off-line switching timing by ON-LINE SW Off-line → on-line switching timing by ON-LINE SWINPUT. Prime Busy Select Nibble Mode Conforms to Ieee 1284 spec ECP Mode188 189 Appendix B RS-232C Serial InterfaceInput 190Input Output 191 FunctionsAppearance and Parts Name 192 Driving Mechanism193 194 Hopper Mechanism195 Precautions Concerning Parts Replacement4PP4076-5395P1 196OKI P/N This section describes the layout of the main components 197198 Parts Replacement Methods199 200 201 202 203 204 205 206 207 208 209 210 Precautions Prior to the TroubleshootingPreparations for the Troubleshooting 211 Troubleshooting MethodYES 212To 3rd Tray Interconnection Diagram 2nd tray/ 3rdTray auto Setting switch To Printer Unit 2nd TrayBBB-PCB 214215 High Capacity Second/ Third Paper Feeder 1/2 216High Capacity Second/ Third Paper Feeder 2/2 217Approximately 50 sheets of envelopes can be set at a time External View and Component Names218 Main functions are the followings Paper that can be used219 General Mechanism220 221 222 223 224 Check at the time of assembly225 226 227 228 229 230 231 232 Checkfeeder 233Check Feeder 234 235 Interconnection Diagram236 237 /237