Oki MICROLINE 320 Turbo Maintenance Manual

Also see for Microline 320 Turbo D1: User guide Brochure & specs Product update User guide User guide

Contents

42089201TH Rev.4 4 /Oki Data CONFIDENTIALCONTENTS1. CONFIGURATION ...........................................................................................61.1. Standard Printer Configuration ..................................................................................... 61.2 Options .......................................................................................................................... 72. THEORY OF OPERATION .............................................................................92.1 Electrical Operation ....................................................................................................... 92.1.1 Summary .......................................................................................................... 92.1.2 Microprocessor and the Peripheral Circuit ..................................................... 92.1.3 Initialization ..................................................................................................... 152.1.4 Parallel Interface Control ............................................................................... 162.1.5 Universal Serial Bus (USB) (at USB Ver.) ................................................... 172.1.6 Print Control ................................................................................................... 192.1.7 SP/LF Motor Control ...................................................................................... 212.1.8 Operation Panel ............................................................................................. 232.1.9 Alarm Circuit .................................................................................................. 252.1.10 Power Supply Circuit ..................................................................................... 272.2 Mechanical Operation ................................................................................................. 282.2.1 Printhead Mechanism and Operation (See Figure 2-2.) .............................. 282.2.2 Spacing Operation (See Figure 2-4.) ........................................................... 312.2.3 Head Gap Adjusting (See Figure 2-5.)......................................................... 322.2.4 Ribbon Drive (See Figure 2-6.) .................................................................... 342.2.5 Paper Feed Operation ................................................................................... 352.2.6 Paper Detection Mechanism (See Figure 2-15.).......................................... 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 .................................................................................................... 643.3.12.1Driver Board (DVE/DVF) (at USB Ver.) ....................................................... 653.3.12.2Driver Board (SDF) (at non USB Ver.) ........................................................ 663.3.13 LF Motor ......................................................................................................... 673.3.14 Operation Panel PCB (LEOP) ....................................................................... 683.3.15 Control/Power Supply Board (AOE/AOU/AOO) ............................................ 693.3.16 Transformer Assy ........................................................................................... 703.3.17 Change Lever and Gears .............................................................................. 713.3.18 Carriage Shaft ................................................................................................ 723.3.19 Paper Pan ...................................................................................................... 733.3.20 Rear Tractor Assy ......................................................................................... 74