Table Of Contents - Oki PACEMARK 4410 Service Manual

1. CONFIGURATION ..................................................................................... 5
1.1 Basic System Configuration............................................................... 5
1.2 Printer Specifications ......................................................................... 6
1.3 Option Specifications ......................................................................... 7
1.4 Basic Specifications ........................................................................... 8
2. THEORY OF OPERATION ........................................................................ 11
2.1 Electrical Operation ........................................................................... 11
2.1.1 Summary ................................................................................................. 11
2.1.2 Microprocessor and the peripheral circuit ............................................... 11
2.1.3 Initialization .............................................................................................. 20
2.1.4 Interface control ....................................................................................... 21
2.1.5 Parallel Interface Control ......................................................................... 21
2.1.6 Serial Interface ........................................................................................ 22
2.1.7 Printing operation .................................................................................... 23
2.1.8 Printhead control ..................................................................................... 24
2.1.9 Print Compensation Control .................................................................... 26
2.1.10 Space motor control ................................................................................ 26
2.1.11 Line feed .................................................................................................. 27
2.1.12 Bail, tractor switching, AG, ribbon motor control ..................................... 28
2.1.13 Operation Panel ...................................................................................... 29
2.1.14 Alarm circuits ........................................................................................... 31
2.1.15 Power supply circuit ................................................................................ 33
2.2 Mechanical Operation ........................................................................ 34
2.2.1 Printhead mechanism and operation ....................................................... 34
2.2.2 Spacing operation ................................................................................... 36
2.2.3 Head gap adjusting ................................................................................. 37
2.2.4 Ribbon drive ............................................................................................ 40
2.2.5 Paper Feed Mechanism .......................................................................... 41
2.2.6 Bail Feed Mechanism .............................................................................. 45
2.2.7 Paper End Detection Mechanism ............................................................ 47
3. PARTS REPLACEMENT ........................................................................... 49
3.1 Precautions for Parts Replacement ................................................... 49
3.2 Parts Layout....................................................................................... 52
3.3 How to Change Parts......................................................................... 53
3.3.1 Cover-Assy-Access / Cover-Assy-Side (R) / Cover-Assy-Side (L)
/Cover-Assy-Front / Frame-Assy-Rear / Plate-Front (stuck) ................ 54
3.3.2 Printer Unit .............................................................................................. 55
3.3.3 Control Block [Control Board (PMA Printed Board),
Driver Board (PDA Printed Board)] ....................................................... 56
3.3.4 Power Supply Assy ................................................................................. 57
3.3.5 PG Cooling Fan ....................................................................................... 58
3.3.6 I/F Board (PHA Printed Board) ................................................................ 59
3.3.7 AG Board (PGA Printed Board) / Connector Cord .................................. 60
3.3.8 AG Motor Assy ........................................................................................ 61
3.3.9 Mini Pitch Belt .......................................................................................... 62
3.3.10 Tractor Change Motor Assy .................................................................... 63
3.3.11 Bail Motor Assy ....................................................................................... 64
3.3.12 LF Motor Assy ......................................................................................... 65
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