OKI ML172/182 free download

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Page: 1 Service Guide ML172/ML182 Series Chapter 0 About This Manual ML172/ML182 Series Dot Matrix Printers 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. Okidata is a registered trademark, and OkiPage is a trademark of Oki Electric Industry Co., Ltd. HP, LaserJet and PCL5e are trademarks of Hewlett-Packard Co. Adobe and Acrobat are trademarks of Adobe Systems Incorporated. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com) Table of Contents Page Service Guide ML172/ML182 Series 0 About This Manual Front Cover Copyright 1 General Description & Specifications 1.1 General Description ...1.1.1 ML172 ...1.1.2 ML182 ...1.1.3 ML182-PLUS ...1.1.4 ML182-TURBO 1.2 Specifications 2 Principles of Operation 2.1 Electrical Principles Of Operation ...2.1.1 Power Supply ...2.1.2 Control PCB ...2.1.3 Interconnect Board ...2.1.4 Operator Board 2.2 Mechanical Principles Of Operation : Printhead ...2.2.2 Head Gap Adjusting Mechanism ...2.2.3 Space Mechanism / Operation ...2.2.4 Ribbon Feed Mechanism / Operation ...2.2.5 Paper Feed Mechanism / Operation ...2.2.6 Paper-end Detection Mechanism ...2..2.7 Semi-Automatic Sheet Feed (SASF) 3 Printer Maintenance 3.1 General Information ...Figure 3-1a - ML172 ...Figure 3-1b - ML182 ...Figure 3-1c - ML182-PLUS/ML182-TURBO 3.2 Maintenance Procedures ...3.2.1 Upper Cover ...3.2.2 Control Board ...3.2.3 Transformer Assembly ...3.2.4 Power Supply Board ...3.2.5 Operation Board ...3.2.6 Printhead ...3.2.7 Ribbon Feed Gear Assembly ...3.2.8 Space Motor Assembly ...3.2.9 Space Rack ...3.2.10 Carriage Cable ...3.2.11 Printer Mechanism ...3.2.12 Linefeed Motor Assembly ...3.2.13 Column Indicator Bar 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 ...3.2.14 Platen Assembly ...3.2.15 Interconnect Board ...3.2.16 Paper Chute Assembly ...3.2.17 Bottom Paper Guide Assembly ...3.2.18 Near-end Lever And Bracket ...3.2.19 Bottom Near-end Lever 3.3 Adjustments ...3.3.2 Space Rack and Roller Gap Adjustment 3.4 Printer Self-Tests 3.5 Preventive Maintenance 4 Interfacing Techniques 4.1 Interfacing Techniques 5 Failure Analysis Procedures 5.1 Failure Analysis Procedure ...RAP Index ...Board layout and Wiring - ML182Plus and ML182Turbo ...Board layout and Wiring - ML172 and ML182 ...Pin Numbers and Signals ...Check Points for Printed Circut Boards - 172 ...Check Points for Printed Circuit Boards - ML182 ...Check Points for Printed Circuit Boards - ML182Plus and ML182Turbo ...RAP #1: Power is on but carriage does not move ...RAP #2: