Table Of Contents - Epson FX 890 - B/W Dot-matrix Printer Service Manual

TABLE OF CONTENTS

PRODUCT SPECIFICATION
1.1 SPECIFICATION .................................................................................. 1-1
1.2 OPERATION......................................................................................... 1-7
1.2.1 Control panel ................................................................................................ 1-7
1.2.2 Switches ........................................................................................................ 1-7
1.2.2.1 Usual Operation .................................................................................. 1-7
1.2.2.2 Operations at Power-on ...................................................................... 1-8
1.2.3 Indicators ( LEDs ) ........................................................................................ 1-9
1.2.4 Buzzer............................................................................................................ 1-9
1.2.5 Default Setting Mode 1 ............................................................................... 1-10
1.2.5.1 Setting Method .................................................................................. 1-10
1.2.5.2 Setting Items ..................................................................................... 1-10
1.2.6 Default Setting Mode 2 ............................................................................... 1-11
1.2.6.1 Setting Items ..................................................................................... 1-11
1.2.7 EEPROM Clear Function ............................................................................ 1-12
1.2.8 Bi-D Adjustment.......................................................................................... 1-13
OPERATING PRICIPLES
2.1 MAIN COMPONENTS .......................................................................... 2-1
2.1.1 C229MAIN Board........................................................................................... 2-1
2.1.2 C229PSB/PSE/PSH Board............................................................................ 2-1
2.2 PRINTER MECHANISM ....................................................................... 2-2
2.2.1 Printhead ....................................................................................................... 2-2
2.2.2 Paper Feed Mechanism................................................................................ 2-2
2.2.3 Carriage Movement Mechanism.................................................................. 2-2
2.2.4 Tractor Feed Mechanism ............................................................................. 2-2
2.2.5 Platen Gap Adjustment Mechanism............................................................ 2-2
2.2.6 Ribbon Feed Mechanism ............................................................................. 2-2
2.3 CIRCUIT OPERATION ......................................................................... 2-4
2.3.1 C229PSB/PSE/PSH Power Supply Circuit .................................................. 2-4
2.3.2 C229MAIN Board Circuit .............................................................................. 2-5