Service manual

SERVICE MANUAL

CONTENTS

PART I THEORY OF OPERATION

CHAPTER 1 MECHANICAL THEORY....................................................................... 1-1

1. Ink Jet Printer ........................................................................................................... 1-1

1.1. Ink Jet Printer System Configuration .......................................................................... 1-2

1.2. Ink Jet Operation........................................................................................................ 1-4

1.2.1. Paper Feed Mechanism................................................................................ 1-4

1.2.2. Carriage Assembly ....................................................................................... 1-7

1.2.3. Carriage Motion Control.............................................................................. 1-10

1.2.4. Maintenance Station Operation................................................................... 1-11

1.2.4.1. Spitting ................................................................................................. 1-12

1.2.4.2. Wiping .................................................................................................. 1-13

1.2.4.3. Capping ................................................................................................ 1-14

1.2.4.4. Purging................................................................................................. 1-14

1.2.5. Sensors ...................................................................................................... 1-15

1.2.5.1. Carriage Home Position Sensor............................................................ 1-15

1.2.5.2. PE Sensor ............................................................................................ 1-16

1.3. INK CHG (Ink Change) Functions............................................................................. 1-17

1.3.1. Ink Cartridge Installation/Replacement ....................................................... 1-17

1.3.2. Automatic Print head Cleaning (Purging) .................................................... 1-17

2. Keyboard................................................................................................................ 1-18

CHAPTER 2 ELECTRICAL THEORY........................................................................ 2-1

1. System Configuration............................................................................................... 2-1

1.1. Main PCB (Printed Circuit Board) ............................................................................... 2-1

1.2. Switch PCB (Printed Circuit Board)............................................................................. 2-1

1.3. Keyboard FPC (Flexible Printed Circuit) ..................................................................... 2-1

1.4. FDD (Floppy Disk Drive) Module ................................................................................ 2-1

1.5. CRT Display............................................................................................................... 2-1

2. Ink Jet Printer Configuration..................................................................................... 2-3

2.1. Ink Cartridge............................................................................................................... 2-3

2.2. Carriage Motor ........................................................................................................... 2-3

2.3. Line Feed Motor ......................................................................................................... 2-3

2.4. Carriage Home Position Sensor.................................................................................. 2-3

2.5. PE (Paper End) Sensor .............................................................................................. 2-3