Table Of Contents - Oki MICROLINE 320 Turbo Maintenance Manual

1. CONFIGURATION ...........................................................................................6
1.1. Standard Printer Configuration ..................................................................................... 6
1.2 Options .......................................................................................................................... 7
2. THEORY OF OPERATION .............................................................................9
2.1 Electrical Operation ....................................................................................................... 9
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.1.9
2.1.10 Power Supply Circuit ..................................................................................... 27
2.2 Mechanical Operation ................................................................................................. 28
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
3. ASSEMBLY/DISASSEMBLY .........................................................................50
3.1 Precaution for Parts Replacement ............................................................................. 50
3.2 Service Tools .............................................................................................................. 51
3.3 Disassembly/Reassembly Procedure ......................................................................... 52
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
3.3.8
3.3.9
3.3.10 Backup Roller Holder Assy ........................................................................... 63
3.3.11 Platen Assy .................................................................................................... 64
3.3.12.1Driver Board (DVE/DVF) (at USB Ver.) ....................................................... 65
3.3.12.2Driver Board (SDF) (at non USB Ver.) ........................................................ 66
3.3.13 LF Motor ......................................................................................................... 67
3.3.14 Operation Panel PCB (LEOP) ....................................................................... 68
3.3.15 Control/Power Supply Board (AOE/AOU/AOO) ............................................ 69
3.3.16 Transformer Assy ........................................................................................... 70
3.3.17 Change Lever and Gears .............................................................................. 71
3.3.18 Carriage Shaft ................................................................................................ 72
3.3.19 Paper Pan ...................................................................................................... 73
3.3.20 Rear Tractor Assy ......................................................................................... 74
42089201TH Rev.4
CONTENTS
Summary .......................................................................................................... 9
Microprocessor and the Peripheral Circuit ..................................................... 9
Initialization ..................................................................................................... 15
Parallel Interface Control ............................................................................... 16
Universal Serial Bus (USB) (at USB Ver.) ................................................... 17
Print Control ................................................................................................... 19
SP/LF Motor Control ...................................................................................... 21
Operation Panel ............................................................................................. 23
Alarm Circuit .................................................................................................. 25
Printhead Mechanism and Operation (See Figure 2-2.) .............................. 28
Spacing Operation (See Figure 2-4.) ........................................................... 31
Head Gap Adjusting (See Figure 2-5.) ......................................................... 32
Ribbon Drive (See Figure 2-6.) .................................................................... 34
Paper Feed Operation ................................................................................... 35
Paper Detection Mechanism (See Figure 2-15.) .......................................... 45
Automatic Sheet Feed ................................................................................... 47
Paper Park Function (Continuous paper) ..................................................... 49
Printhead ........................................................................................................ 54
Ribbon Protector ............................................................................................ 55
Pull-up Roller Assy ........................................................................................ 56
Upper Cover Assy, Access Cover Assy and Sheet Guide Assy ................ 57
Gear Case Assy ............................................................................................ 58
PC Connector ................................................................................................ 59
Space Motor, Guide Roller Assy .................................................................. 60
Space Rack .................................................................................................... 61
Carriage Cable ............................................................................................... 62
Oki Data CONFIDENTIAL
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