Oki ML420 Maintenance Manual
Also see for ML420 Series: Specification sheetUser guideUser guideInstallationInstallation
                                                                                                                     | |
Contents
| 
Oki Data CONFIDENTIAL42113931TH Rev.1 4 /Contents1. CONFIGURATION ...............................................................................................61.1 Standard Printer Configuration ............................................................................................ 61.2 Options ................................................................................................................................. 72. THEORY OF OPERATION ..................................................................................92.1 Electrical Operation .............................................................................................................. 92.1.1 Summary ................................................................................................................. 92.1.2 SOC and the Peripheral Circuit ............................................................................... 92.1.3 Initialization ........................................................................................................... 122.1.4 Interface Control ................................................................................................... 132.1.5 Print Control .......................................................................................................... 162.1.6 SP/LF Motor FAN Control ..................................................................................... 182.1.7 Operation Panel .................................................................................................... 212.1.8 Alarm Circuit ......................................................................................................... 232.1.9 Power Supply Unit ................................................................................................ 262.2 Mechanical Operation ........................................................................................................ 282.2.1 Printhead Mechanism and Operation ................................................................... 282.2.2 Spacing Operation ................................................................................................ 312.2.3 Head Gap Adjusting .............................................................................................. 322.2.4 Ribbon Drive ......................................................................................................... 342.2.5 Paper Feed Operation .......................................................................................... 352.2.6 Paper Detection Mechanism ................................................................................. 452.2.7 Automatic Sheet Feed .......................................................................................... 472.2.8 Paper Park Function (Continuous paper) ............................................................. 493. ASSEMBLY/DISASSEMBLY ..............................................................................503.1 Precaution for Parts Replacement ..................................................................................... 503.2 Service Tools ..................................................................................................................... 513.3 Disassembly/Reassembly Procedure ................................................................................ 523.3.1 Printhead ............................................................................................................... 543.3.2 Ribbon Protector ................................................................................................... 553.3.3 Pull-up Roller Assy ................................................................................................ 563.3.4 Upper Cover Assy, Access Cover Assy and Sheet Guide Assy ........................... 573.3.5 Gear Case Assy .................................................................................................... 583.3.6 PC Connector ....................................................................................................... 593.3.7 Space Motor, Guide Roller Assy ........................................................................... 603.3.8 Space Rack ........................................................................................................... 613.3.9 Carriage Cable ...................................................................................................... 623.3.10 Backup Roller Holder Assy ................................................................................... 633.3.11 Platen Assy ........................................................................................................... 643.3.12 Main Control PCB ................................................................................................. 653.3.13 LF Motor ................................................................................................................ 663.3.14 Operation Panel PCB ............................................................................................ 673.3.15 Power Supply Unit, Sensor PCB ........................................................................... 683.3.16 AC inlet and AC Switch ......................................................................................... 693.3.17 Change Lever and Gears ...................................................................................... 703.3.18 Carriage Shaft ....................................................................................................... 713.3.19 Paper Pan ............................................................................................................. 72 |
Related manuals for Oki ML420 Series
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine