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File name Okidata - ML380 Series Service Manual.pdf

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. 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 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 C