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Oki 3320, 3321 specifications Troubleshooting and Repair

Models: 3320 3321

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Troubleshooting Specs Parts list Head Drive Timing Chart Before Repairing a Fault Configuration MPU Reset Assembly/Disassembly Adjustment Cleaning and Lubrication

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6.TROUBLESHOOTING AND REPAIR

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Oki 3320, 3321 specifications Troubleshooting and Repair

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Contents

Printer Preface Table of Contents Troubleshooting and Repair Adjustment Cleaning and LubricationAppendix PCB Layout Spare Parts List Configuration Standard Printer Configuration Configuration Options Page Theory of Operation Electrical Operation Theory of Operation TSD AUTO-LF MPU Clock CAS MPURAS CS1 EEDIN-P EECS-P EEDOUT-P EECLK-P Eeprom Eeprom LSI Lsics ALEALE RDN WRL Lsic Busy OFF MPU ResetLSI Reset Check MPU Head Drive Timing Chart Platen Pin coil current Pin 1 Pin 1, 2, 8 Print Head Page Hall AMP Input Output SPU SPV SPW Open Utility Mode PHASE-A PHASE-B Forward Reverse LSI Optd Opck NPA2 Oprd Optxd Opclk Optxd Powlev Temp Stop 119C Mode up Mode down Uses of output voltages and signals are described below Mechanical Operation Page When printing Page Page Page Range from 5 to Page Ribbon cartridge Drive gear Ink tank Page Rear TOP Bottom OFF Bottom TOP Page Platen gear Paper Idle gear Tractor gear Change gear Pull tractor Drive gear Idle gear Platen gear Push tractor Page Page Bottom Open TOP Close Rear Bottom Rear Page Page Page Platen Ribbon protector Printhead Carriage frame assembly Rear TOP Bottom SW2 SW1 Page Park ASSEMBLY/DISASSEMBLY Precaution for Parts Replacement ASSEMBLY/DISASSEMBLY Service tools Service Tools Printer unit Disassembly/Reassembly ProcedurePage Page Page Page Page Page Page Page Page Claw Page Page Sensor Lock a Page Page Page Page Page Page Page Page Page Adjustment Adjustment Specification Drawing Measured With Adjust lever Confirm followings Friction Rotation of the push To confirm Tractor Ribbon feed To confirm Engagement Cleaning and Lubrication Cleaning Cleaning and Lubrication Carriage shaft Lubrication Lubrication point Ribbon feed gear Assy Platen Assy Tractor driving mechanism Pressure roller Pull up roller Assy Main chassis Assy Carriage Assy Troubleshooting and Repair Troubleshooting Table Troubleshooting and RepairItems to Check Before Repair Lamp Display Printer mode display 1/2 2/2 Page HEAD9 HEAD7 HEAD5 HEAD3 Connection Circuit Check for Printhead and SP/LF MotorCN1 HEAD1 HEAD2 HEAD4 HEAD6 HEAD8 Htemp LF4 LF1 LF2 LF3 SP-W SP-U SP-V Troubleshooting flow chart CN2 Page Page Pull up roller cover Platen Paper Ribon Protector Page Page Page Page Page Page DTR TXDRXD SSDPage Appendix a Appendix a Appendix a BIT Image Graph is DOT Density PCB list PCB Layout Appendix B Spare Parts List Upper Cover Assy Description Qty Remarks Printer General Assy ROM 1716 2931 Printer Unit Description Qty Carriage Assy Carriage Option Assy Option Spare Parts LXHI-PCB RS232 I/F Appendix C Appendix C RS-232C Serial Interface Board General Element Description Operation DescriptionCircuit Description ROM If WRRAM Page Mode a Communication Procedure Flowchart Figure C-2-3 Before Repairing a Fault Troubleshooting FlowchartTroubleshooting Figure C-3-1 Figure C-3-3 Figure C-3-5 RTS CTS SSD DTR DSR Local TestPage Appendix D CSF Option People to People Technology

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