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. [. . . ] 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. (http://bpx. okidata. com) Page: 70 Service Guide ML380 Chapter 3 Maintenance & Disassembly 3. 3. 06 Top of Form General Information Top of Form is the distance from the top edge of the paper to the first print position on the page (the highest vertical position on the page where the first line of printing will appear). When setting the top of form, use the lower red line on the ribbon protector as a guideline. The red line shows the baseline of the current printing position. The Top of Form may be set for each of the paper paths. · Cut Sheet (single-sheet) · Rear Feed · Rear Feed With Pull Tractor · Bottom Feed Cut Sheet (Single Sheet) 1. Press the SELECT button to deselect the printer. To move the paper, do either of the following. To move the paper up, press and hold TOF/PARK and press FEED. To move the paper down, press and hold TOF/PARK and press FONT. This moves the paper in increments of 1/180 of an inch. Press TOF/PARK to store the top of form position in memory. Press the SELECT button to select the printer. Press the SELECT button to deselect the printer. To move the paper, do either of the following. To move the paper up, press and hold TOF/PARK and press FEED. To move the paper down, press and hold TOF/PARK and press FONT. This moves the paper in increments of 1/180 of an inch. Press TOF/PARK to store the top of form position in memory. 5. Press the SELECT button to select the printer. Press the SELECT button to deselect the printer. [. . . ] 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. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx. okidata. com) Page: 132 Service Guide ML380 Chapter B Illustrated Parts Listing B. 2. 08 Consumables Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item 1 Okidata P/N Oki-J P/N 52104001 N/A Description Ribbon: Cartridge Comments Refer to B. 1. 02 Consumable Disassembly Procedure 3. 2. 02 Copyright 1997, Okidata, Division of OKI America, Inc. [. . . ]