User manual OKI DATA ML380 SERVICE MANUAL

[. . . ] Page: 1 Service Guide ML380 Chapter 0 About This Manual ML380 Dot Matrix Printer Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 09/17/97 Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi, which is ideal for printing, but does not view on most displays well. Copyright 1997, Okidata, Division of OKI America, Inc. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Table of Contents Page Service Guide ML380 0 About This Manual Front Cover Manual Copyright 1 Product Specifications 1. 1 Overview 1. 2 Physical Specifications 1. 3 Power Requirements 1. 4 Environmental Conditions 1. 5 Agency Approvals 1. 6 Operational Specifications 1. 7 Paper Specifications 1. 8 Memory Specifications 1. 9 Consumables 1. 10 Options 1. 11 Reliability 2 Principles of Operation 2. 1 Principles of Operation - General Information . . . . 2. 1. 02 Microprocessor and Peripheral Circuits . . . . 2. 1. 03 Initialization . . . . 2. 1. 04 Interface Control . . . . 2. 1. 05 Printhead Drive Circuit . . . . 2. 1. 06 Spacing Drive Circuit . . . . 2. 1. 07 Line Feed Circuit . . . . 2. 1. 08 Alarm Circuits . . . . 2. 1. 09 Paper End Detection Circuit . . . . 2. 1. 10 Power Supply 2. 2 Mechanical Operation - Printhead Mechanism . . . . 2. 2. 02 Spacing . . . . 2. 2. 03 Ribbon Drive . . . . 2. 2. 04 Paper Feed . . . . 2. 2. 05 Paper-End Detection . . . . 2. 2. 06 Semi-Automatic Sheet Feeder (SASF) . . . . 2. 2. 07 Paper Park 3 Maintenance & Disassembly 3. 1 Maintenance - General Information . . . . 3. 1. 02 Maintenance Tools . . . . 3. 1. 03 Maintenance Precautions 3. 2 Disassembly/Assembly Procedures - General Information . . . . 3. 2. 01 Paper Separator . . . . 3. 2. 02 Printhead . . . . 3. 2. 03 Upper Cover Assembly . . . . 3. 2. 04 Space Rack 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Table of Contents . . . . 3. 2. 05 Ribbon Feed Gear Assembly . . . . 3. 2. 06 Mini-Pitch (Space) Belt . . . . 3. 2. 07 Head Connector Assembly . . . . 3. 2. 08 Main Control Board (UMMB) . . . . 3. 2. 09 Operation Panel . . . . 3. 2. 10 Line Feed Motor . . . . 3. 2. 11 Photosensor Assembly (Paper End) . . . . 3. 2. 12 Bail Arms . . . . 3. 2. 13 Carriage Frame . . . . 3. 2. 14 Platen Assembly . . . . 3. 2. 15 Pressure Roller Assembly . . . . 3. 2. 16 Paper Pressure Guide . . . . 3. 2. 17 Tractor Assembly . . . . 3. 2. 18 Microswitch Assembly (SASF) . . . . 3. 2. 19 Microswitch Assembly (Home Position Switch) . . . . 3. 2. 20 Printer Mechanism . . . . 3. 2. 21 Power Supply Unit . . . . 3. 2. 22 Space Motor Assembly . . . . 3. 2. 23 Bottom Paper Guide Lever 3. 3 Printer Adjustments . . . . 3. 3. 02 Gap Between Platen and Printhead . . . . 3. 3. 03 Space Belt Tension . . . . 3. 3. 04 Key Combinations . . . . 3. 3. 05 Menu Operation / Menu Select Mode - General Information . . . . . . . . From Print Mode . . . . . . . . From Power-OFF . . . . . . . . Printing the Menu . . . . . . . . Sample Menu . . . . . . . . Reset Menu to Factory Defaults . . . . . . . . Limited Operation . . . . . . . . Menu Settings . . . . 3. 3. 06 Top of Form . . . . 3. 3. 07 Paper Park . . . . 3. 3. 08 Paper Tear Off . . . . 3. 3. 09 Resets 3. 4 Cleaning 3. 5 Lubrication 3. 6 Shipping Instructions 4 Failure & Repair Analysis 4. 1 Failure & Repair Analysis - Introduction . . . . 4. 1. 02 Printer Serial Number Identification . . . . 4. 1. 03 Firmware Revision Identification 4. 2 Reporting Problems - General Information Page 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Table of Contents . . . . 4. 2. 02 Problem Lists . . . . 4. 2. 03 Reporting Methods 4. 3 Troubleshooting Updates General Information 4. 4 Troubleshooting Tips . . . . 4. 4. 02 Problem Categories . . . . 4. 4. 03 START HERE Flowchart . . . . 4. 4. 04 Tips for Preventing Image Problems . . . . 4. 4. 05 Common Problems 4. 5 Abnormal Output 4. 6 Fault Alarms - General Information . . . . 4. 6. 02 Fault Alarm Lamp Display 4. 7 Repair Analysis Procedures (RAPS) - Using The RAPS . . . . 4. 7. 02 RAP Index . . . . . . . . RAP 01: No Power . . . . . . . . RAP 02: Space Operation Does Not Operate Normally . . . . . . . . RAP 03: Wrong Character or Missing Dots . . . . . . . . RAP 04: Line Feed Trouble . . . . . . . . RAP 05: Data Receiving Failure 4. 8 Printer Tests - General Information . . . . 4. 8. 02 Rolling ASCII Test . . . . 4. 8. 03 Font Test . . . . 4. 8. 04 Serial Interface Loopback Test - General Information . . . . . . . . Loopback Connector Configuration Diagram . . . . . . . . Procedure . . . . . . . . Serial Cable Information . . . . . . . . Serial Interface Signal Requirements . . . . . . . . Commonly Used Serial Cable Configurations . . . . 4. 8. 05 Hexadecimal Dump Mode 4. 9 Resistance Checks - General Information . . . . 4. 9. 02 Main Control Board (UMMB) Voltage Check Points . . . . 4. 9. 03 Connectors Block Diagram . . . . 4. 9. 04 Connector Location . . . . 4. 9. 05 Resistance Diagrams - Printhead . . . . . . . . Space and Line Feed Motors . . . . 4. 9. 06 Head Cable Connection A Board Diagrams A1 Board Diagrams - General Information A. 2 Index To Charts . . . . A. 2. 01 Main Control Board (UMMB) Original . . . . A. 2. 02 Main Control Board (UMMB) Current . . . . A. 2. 03 RS232-C Serial Module (UMRS) B Illustrated Parts Listing B. 1 Overview - General Information . . . . B. 1. 02 Definition of Terms Page 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 Table of Contents . . . . B. 1. 03 Parts Ordering Information B. 2 Charts . . . . B. 2. 01 Printer . . . . B. 2. 02 Covers . . . . B. 2. 03 Printer Unit . . . . B. 2. 04 Printer Mechanism (1 of 3) . . . . B. 2. 05 Printer Mechanism (2 of 3) . . . . B. 2. 06 Printer Mechanism (3 of 3) . . . . B. 2. 07 Option Parts . . . . B. 2. 08 Consumables . . . . B. 2. 09 Packaging . . . . B2. 10 Documentation . . . . B. 2. 11 Service Training Kit Revision List Page 123 124 125 126 127 128 129 130 131 132 133 134 135 Page: 2 Service Guide ML380 Chapter 0 About This Manual Manual Copyright This document may not be reproduced without the written permission of the Okidata Technical Training Group. [. . . ] The SELECT lamp will go out and MENU MODE will print on the paper. From Power-OFF Verify that the printer is powered-OFF. For more information regarding the menu, please refer to the Printer Handbook. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Page: 66 Service Guide ML380 Chapter 3 Maintenance & Disassembly Sample Menu Copyright 1997, Okidata, Division of OKI America, Inc. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Page: 67 Service Guide ML380 Chapter 3 Maintenance & Disassembly Reset Menu to Factory Defaults CAUTION: Once the menu has been reset, all customized menu settings will be lost. Always print the menu before resetting the printer to factory defaults. To reset the menu to factory default settings: 1. Before resetting the Menu, Okidata STRONGLY RECOMMENDS printing the Menu. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Page: 68 Service Guide ML380 Chapter 3 Maintenance & Disassembly Limited Operation General Information One of the menu selections that may be set by the end user is the operator panel function. Operator Panel Function is an item in the General Control Group of the menu. If the Operator Panel Function is set to Limited Operation the menu cannot be accessed and the operator panel switches listed below are not active. Pitch The Operator Panel Function item is frequently set to Limited Operation on networks or other areas where many users share a printer. Procedure To return the printer to Full Operation, you must modify the menu. CAUTION: Determine the preference of the end user regarding this feature. If the printer is on a network, do not reset this item without discussing the change with the network supervisor. To access the menu when the printer is set to Limited Operation, follow this procedure. CAUTION: If paper is not installed, the printhead will print on the platen. When in Menu Mode, the functions printed below the operator panel switches are active. 6. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Page: 69 Service Guide ML380 Chapter 3 Maintenance & Disassembly Menu Settings Factory default settings are printed in Bold Italic. Group Font Item Print Mode Pitch Style Size Cut Sheet Feeder General Control Graphics Setting LQ Courier LQ Swiss LQ Roman LQ Orator LQ Prestige LQ Gothic Utility 10 12 15 17. 1 20 cpi Proportional Normal Italic Single Double Not Installed; Installed Uni-directional bi-directional No Yes O -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 Full Operation Limited Operation Parallel Serial 6 8 LPI Off On No Yes No Yes 11 11 2/3 12 14 3 3. 5 4 5. 5 6 7 8 8. 5 " Set I Set II Epson American French German British Danish I Swedish Italian Spanish I Japanese Norwegian Danish II Spanish II Latin American French Canadian Slashed Unslashed 01 Paper Out Override Print Registration Operator Panel Functions Interface Vertical Control Line Spacing Form Tear-Off Skip Over Perforation Auto LF Page Length Symbol Sets Character Set Language Set Zero Character Number of DLL Sets Parallel I/F I-Prime Signal Auto Feed XT Pin 18 Output Valid Invalid Invalid Valid 0v +5v Serial I/F Parity Serial Data 7 or 8 Bits Protocol None Odd Even 8 Bits 7 Bits Ready / Busy X-ON / X-OFF No Yes SSD- SSD+ DTR RTS 9600 4800 2400 1200 600 300 19200 bps Valid Invalid Ready on Power Up Ready on Select 200 milliseconds 1 second Diagnostic Test Busy Line Baud Rate DSR Signal DTR Signal Busy Time Copyright 1997, Okidata, Division of OKI America, Inc. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. [. . . ] See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Page: 131 Service Guide ML380 Chapter B Illustrated Parts Listing B. 2. 07 Option Parts Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Oki-J P/N Description Comments Refer to B. 1. 02 Disassembly Procedure 1 70000803 Kit: IBM PC Cable Kit for Parallel Printers Kit: Cut Sheet Feeder 3800 Single Bin (ML380) Kit: Super Speed RS-232C (ML380) Module: Interface (RS232C) Cover: Upper (RS232C I/F) PCB: UMRS (RS232C I/F) w/o ROM Cover: Lower (RS232C I/F) Kit: Pull Tractor (ML380) Unit: Tractor Cover: Tractor Option N/A 2 70016001 Option N/A 3 4 5 6 70016101 N/A 4YA4042-1451G1 53511601 2PP4043-3718P1 55047901 4YA4042-1451G11 53511501 2PP4043-3717P1 70015901 50072001 3PA4025-2971G1 53510501 1PP4094-1084P1 Option Incl 4 5 6 7 Option Inc. 5 6 7 Option RSPL Part of 4 Option RSPL Part of 4 Option RSPL Part of 4 Option Inc 9 and 10 Option Part of 8 Option Part of 8 N/A N/A N/A N/A 7 8 9 10 N/A N/A N/A N/A Copyright 1997, Okidata, Division of OKI America, Inc. [. . . ]