Epson LX-300 Serial interface specifications

Serial interface specifications

The serial interface has the following characteristics.

Bit rate: 300, 600, 1200, 2400, 4800, 9600, 19200 bps

(selectable)

Word length:

Data format 7 or 8-bit (selectable)

Start bit 1 bit

Parity bit 0 or 1 bit (selectable)

Stop bit 1 bit (transmitting), 1 bit o r more (receiving)

Synchronization: Asynchronous

Handshaking: DTR protocol, XON/XOFF protocol

ETX/ACK protocol (selectable)

Parity check: Odd, even, or no parity bit (selectable)

Connector: EIA standard, 25-pin, D-SUB, female

connector

Serial pin assignments

The following table lists the serial connector pin assignments and

describes their respective interface signals.

Pin No. Signal Direction Description

1Protective Ground (FG) Printer’s chassis ground

2Transmitted data (TXD/SD) Out Printer has transmitted serial data

3Received data (RXD/RD) In Printer has received serial data

4Request to Send (RTS/RS) Out Always positive

5Clear to Send (CTS/CS) In Ignored

7Signal Ground (SG) Return path for data control

signals

11 Reverse Channel Out Connected to Pin 20

20 Data Terminal Ready

(DTR/ER) Out Positive when the printer is ready

to accept data, an d negative

when the printer is not ready

L

Blueberry REV.E

A5 size Appendix

95/04/17

A-8 Appendix

Contents

Main Page EPSON LX-300 Users Guide FCC Compliance Statement For United States Users ii For Canadian Users A5 size Front 95/04/17 Where to Get Help for United States Users For United Kingdom Users Epson product guarantee iv Use of options Safety information vi Contents Introduction Chapter 1 Setting Up the Printer Chapter 2 Using the Printer Chapter 3 Troubleshooting viii Appendix Index x Introduction Features Finding Your Way Around Warnings, Cautions, and Notes 2 w c Notes Important Safety Instructions 4 Chapter 1 Setting Up the Printer Unpacking the Printer 1-2 Choosing a place for the printer Assembling the Printer Installing the paper-feed knob 1-4 Attaching the paper supports Installing the ribbon cartridge w 1-6 Page 1-8 Plugging in the printer Running the Self Test 1-10 PAUSE 1-12 Connecting the Printer to Your Computer Using the parallel interface 1-14 Using the serial interface Setting Up Your Software 1-16 Microsoft Windows Using non-Windows software 1-18 Chapter 2 Using the Printer Using the Control Panel Lights and buttons 2-2 FONT 1 and FONT 2 lights FONT button Page Selecting fonts 2-4 Printing on Single Sheets Loading single sheets Adjusting the loading position Getting the results you expect 2-6 Printing on Continuous Paper Printing with the push tractor 2-8 Page 2-10 Switching back to single sheets Printing with the pull tractor 2-12 Page 2-14 Printing on Special Paper Adjusting the paper-thickness lever 2-16 Multi-part forms Labels Envelopes 2-18 Changing the Printer Settings 2-20 Page Printer setting descriptions Character spacing 2-22 Shape of zero Skip-over-perforat ion Character table Auto line feed Page length Auto tear off Tractor Installing and Using Options Cut-sheet feeder Page 2-26 Page Pull Tractor unit 2-28 Roll paper holder 2-30 Color upgrade kit 2-32 Page 2-34 Chapter 3 Troubleshooting Problems and Solutions FONT 3-2 LF/FF Power Supply Printing The printer does not print The print is faint or uneven Dots are missing in printed characters or graphics 3-4 Printed characters are not what you expected The print position is not what you expected Paper Handling Single sheets do not feed properly 3-6 Continuous paper does not feed properly Options When you use the cut-sheet feeder, the paper does not feed properly 3-8 Switching between the cut-sheet feeder and the push tractor does not work properly Using the pull tractor with the push tractor, continuous paper does not feed properly With color upgrade kit installed, printer doesnt operate properly 3-10 Appendix Printer Specifications Printing A-2 Paper Appendix A-3 A-4 Appendix A-5 Mechanical Electrical A-6 Environmental Safety approvals Interface Specifications Parallel interface specifications Serial interface specifications Serial pin assignments A-8 Printer Settings Appendix A-9 A5 size Appendix 95/04/17 Command Summary Sending printer commands A-10 Using the command summary Printer operation Data control Appendix A-11 Vertical motion Horizontal motion A-12 Overall printing style Print size and character width Appendix A-13 Print enhancement Word processing Character tables A-14 User-defined characters Appendix A-15 Color printing Graphics A-16 Index A Index 1 B C M N 2 O P T U Index 3 W Z