Table Of Contents - Epson LX-300 Service Manual

Chapter 1 Product Description
1.1 Features .............................................................................................. 9
1.2 Printing Specification ...................................................................... 10
1.2.1 Printing Specification ................................................................. 10
1.2.2 Paper Feeding ........................................................................... 13
1.2.3 Electrical Specification .............................................................. 14
1.2.4 Environmental Condition ........................................................... 14
1.2.5 Reliability ................................................................................... 14
1.2.6 Ribbon Cartridge ....................................................................... 14
1.2.7 Safety Approvals ....................................................................... 15
1.2.8 CE Marking ................................................................................ 15
1.2.9 Acoustic noise: .......................................................................... 15
1.2.10 Printable Area .......................................................................... 16
1.3 Interface Specifications .................................................................. 19
1.3.1 Parallel Interface (Forward Channel) ........................................ 19
1.3.2 Parallel Interface (Reverse Channel) ........................................ 21
1.3.3 Serial Interface .......................................................................... 22
1.3.4 Interface Selection ..................................................................... 23
1.3.5 Prevention Hosts from Data Transfer Time-out ......................... 23
1.3.6 IEEE1284.4 protocol ................................................................. 23
1.4 Operation .......................................................................................... 24
1.4.1 Control Panel ............................................................................. 24
1.4.1.1 Switches ............................................................................. 24
1.4.1.2 LED .................................................................................... 25
1.4.1.3 Buzzer ................................................................................ 25
1.4.2 Functions ................................................................................... 26
1.4.2.1 Usual Operation ................................................................. 26
1.4.2.2 Operation at Power-on ....................................................... 26
1.4.2.3 Default Setting .................................................................... 26
1.4.2.4 Bi-d. Adjustment ................................................................. 28
1.4.3 Errors ......................................................................................... 28
1.5 Control codes .................................................................................. 29
1.5.1 ESC/P2 ...................................................................................... 29
Contents
1.5.2 IBM 2390 Plus Emulation .......................................................... 30
1.5.3 Bi-Directional Commands ......................................................... 31
1.5.3.1 Reply Printer Status ........................................................... 33
1.5.3.2 Packet commands .............................................................. 34
1.6 Initialization ...................................................................................... 35
1.7 Paper Specifications ....................................................................... 36
1.8 Physical Specifications .................................................................. 39
1.9 Accessories ..................................................................................... 40
Chapter 2 Operating Principles
2.1 Overview .......................................................................................... 42
2.2 Printer Mechanism (M-3M10) .......................................................... 43
2.2.1 Printhead ................................................................................... 44
2.2.1.1 Buzzer Function ................................................................. 44
2.2.2 Carriage Mechanism ................................................................. 45
2.2.2.1 High speed skip method ..................................................... 47
2.2.3 Ribbon Mechanism ................................................................... 47
2.2.3.1 Ink Ribbon Shifting Mechanism .......................................... 47
2.2.3.2 Color Ribbon Driving Mechanism (Option) ......................... 47
2.2.4 Platen Gap Adjustment Mechanism .......................................... 49
2.2.5 Paper Feed Mechanism ............................................................ 50
2.2.5.1 Page Length Measurement ................................................ 51
2.2.6 Release Mechanism .................................................................. 52
2.2.7 Other Special Functions ............................................................ 52
2.2.7.1 Energy saving mode ........................................................... 52
2.2.7.2 Quiet Mode ......................................................................... 52
2.3 Electric Circuit Operating Principles ............................................. 53
2.3.1 MAIN Board (Control Board) Electric Circuit ............................. 53
2.3.2 C294PSB / C294PSE Board ..................................................... 54
2.3.2.1 Electric Circuit .................................................................... 54