Oki PACEMARK 4410 - Default Chapter; Table of Contents

40496501TH Rev.1 4 /
CONTENTS
1. CONFIGURATION ..................................................................................... 6
1.1 Basic System Configuration............................................................... 6
1.2 Printer Specifications ......................................................................... 7
1.3 Option Specifications ......................................................................... 8
1.4 Basic Specifications........................................................................... 9
2. THEORY OF OPERATION ........................................................................ 12
2.1 Electrical Operation ........................................................................... 12
2.1.1 Summary ................................................................................................. 12
2.1.2 Microprocessor and the peripheral circuit ............................................... 12
2.1.3 Initialization .............................................................................................. 21
2.1.4 Interface control ....................................................................................... 22
2.1.5 Parallel Interface Control ......................................................................... 22
2.1.6 Serial Interface ........................................................................................ 23
2.1.7 Printing operation .................................................................................... 24
2.1.8 Printhead control ..................................................................................... 25
2.1.9 Print Compensation Control .................................................................... 27
2.1.10 Space motor control ................................................................................ 27
2.1.11 Line feed .................................................................................................. 28
2.1.12 Bail, tractor switching, AG, ribbon motor control ..................................... 29
2.1.13 Operation Panel ...................................................................................... 30
2.1.14 Alarm circuits ........................................................................................... 32
2.1.15 Power supply circuit ................................................................................ 34
2.2 Mechanical Operation........................................................................ 35
2.2.1 Printhead mechanism and operation (See Figure 2-13) ......................... 35
2.2.2 Spacing operation (See Figure.2-15) ...................................................... 37
2.2.3 Head gap adjusting ................................................................................. 38
2.2.4 Ribbon drive (See Figure) ....................................................................... 41
2.2.5 Paper Feed Mechanism .......................................................................... 42
2.2.6 Bail Feed Mechanism (See Figure ) ........................................................ 46
2.2.7 Paper End Detection Mechanism (See Figure ) ..................................... 48
3. PARTS REPLACEMENT........................................................................... 50
3.1 Precautions for Parts Replacement ................................................... 50
3.2 Parts Layout....................................................................................... 53
3.3 How to Change Parts......................................................................... 54
3.3.1 Cover-Assy-Access / Cover-Assy-Side (R) / Cover-Assy-Side (L)
/Cover-Assy-Front / Frame-Assy-Rear / Plate-Front (stuck) .................. 55
3.3.2 Printer Unit .............................................................................................. 56
3.3.3 Control Block [Control Board (PMA Printed Board),
Driver Board (PDA Printed Board)] ......................................................... 57
3.3.4 Power Supply Assy ................................................................................. 58
3.3.5 PG Cooling Fan ....................................................................................... 59
3.3.6 I/F Board (PHA Printed Board) ................................................................ 60
3.3.7 AG Board (PGA Printed Board) / Connector Cord .................................. 61
3.3.8 AG Motor Assy ........................................................................................ 62
3.3.9 Mini Pitch Belt.......................................................................................... 63
3.3.10 Tractor Change Motor Assy .................................................................... 64
3.3.11 Bail Motor Assy ....................................................................................... 65
3.3.12 LF Motor Assy ......................................................................................... 66
3.3.13 Head Cooling Fan 1 ................................................................................ 67
3.3.14 Head Cooling Fan 2 ................................................................................ 68
3.3.15 Space Motor ............................................................................................ 69