Star Micronics NX-2460C Manuale utente

DOT MATRIX PRINTER

NX-2460C

NX-2460

LC-240C

LC-240

TECHNICAL MANUAL

[THIRD EDITION]

NOTICE

•Allrightsreserved.Reproductionofanypartofthismanualinany

form whatsoever, without STAR’s express permission is forbid-

den.

•The contents of this manual are subject to change without notice.

•All efforts have been made to ensure the accuracy of the contents

of this manual at the time of going to press. However, should any

errors be detected, STAR would greatly appreciate being in-

formed of them.

•The above notwithstanding, STAR can assume no responsibility

for any errors in this manual.

INTRODUCTION

This manual is an introduction to dot matrix printers as shown below.

It is intended for use as a reference for periodic inspections and maintenance procedures.

This manual is prepared for use at a technical level and not for the general user.

Model Type Destination

NX-2460C Colour For American, Asia market

NX-2460 Monochrome For Asia market

LC-240C Colour For European and Pacific market

LC-240 Monochrome For European market

•This manual is divided into the following sections:

Chapter 1 General Specifications

Chapter 2 Theory of Operation

Chapter 3 Adjustments

Chapter 4 Parts Replacement

Chapter 5 Maintenance and Lubrication

Chapter 6 Troubleshooting

Chapter 7 Parts List

•Thisprinterdoesnothaveapowerswitch.Even if the LED isoff,unplugthepowercordtoturnthe printer off.

•First edition : Oct. 1994

Second edition : Sep. 1995

Third edition : Apr. 1996

CHAPTER 1

GENERAL SPECIFICATIONS

1. External Appearance and Composition ..............................................................3

2. Control Panel.........................................................................................................5

3. Parallel Interface ...................................................................................................6

3-1. General Specifications ...........................................................................................6

3-2. Connector Signals ..................................................................................................6

4. Serial Interface (optional) .....................................................................................7

4-1. General Specifications ...........................................................................................7

4-2. Connector Signals and Functional Descriptions ................................................ 7

4-3. DIP Switch Settings ................................................................................................8

5. EE-PROM Mode .....................................................................................................9

5-1. Outline...................................................................................................................... 9

5-2. Explanation of Special Control Codes ..................................................................9

5-3. EE-PROM Map .......................................................................................................10

5-4. Rewriting the EE-PROM........................................................................................15

– 2 –

GENERAL SPECIFICATIONS

– 3 –

GENERAL SPECIFICATIONS

1. External Appearance and Layout

Fig. 1-2 Front View of the Printer

Fig. 1-1 External dimensions

232mm

390mm

158mm

Control panel

Front cover

Automatic sheet feeder Guide Wire

Interface connector

– 4 –

GENERAL SPECIFICATIONS

Fig. 1-3 Front Cover removed

Fig. 1-4 Diagram of Internal Layout

Paper tray cover

Platen

Print head

Ribbon Cartridge

Carriage

Motor

Cable Holder

Carriage

Print Head

Paper Feed Motor

Printer Mechanism

Main Logic Board

Control Panel Board

Power Supply Unit

Home Positon SW

(Monochrome)

Home Positon Board

(Colour)

Release Lever SW

– 5 –

GENERAL SPECIFICATIONS

2. Control Panel

(1) PAPER Switch

ASF paper end SW…once manual insert

SW…twice ASF insert

paper On-line paper eject

Off-line Short time sw push LF

Long time sw hold paper eject

Continue paper end SW paper insert

paper paper On-line paper park

Off-line Short time sw push LF

Long time sw hold FF

(2) READY SWITCH/SLEEP MODE

Pushing the switch : Set printer on/off-line

Holding down the switch : SLEEP MODE

(3) PAPER SWITCH & READY SWITCH

While in SLEEP MODE : Executesselfprint1,self print2orHEX-DUMPaccordingtothe EDSsettings.

When the power is turned on : Ignored

(4) READY LAMP

Power is on (ON-LINE) : Lamp ON

Power is on (OFF-LINE) : Slow-blinking

No paper : Slow-blinking

The printer stops after detecting an overheated printer head. : Slow-blinking

Error : Fast-blinking

Push

Hold

PAPER READY

FF On-Line

Sleep

PAPER SW READY-LAMP READY SW

SLEEP MODE SW

PAPER &READY SW

– 6 –

GENERAL SPECIFICATIONS

3. Parallel Interface

3-1. General Specifications

Item Specifications

Interface Centronics-compatible

Synchronization System Via externally supplied STROBE pulse

I/F Protocol Using ACK and BUSY signals

Logic Level Compatible with TTL level

ACK

Data

STROBE

(EDS G-1 : ON)

STROBE

(EDS G-1 : OFF)

BUSY

2.6ms

t : More than 0.5ms

2.6ms

tttt

Fig. 1-5 Timing Charts for Parallel Interface

3-2. Connector Signals

Pin Name Function

1 STROBE Goes to low for 0.5µs when active.

2 DATA0 High when active.

3 DATA1 High when active.

4 DATA2 High when active.

5 DATA3 High when active.

6 DATA4 High when active.

7 DATA5 High when active.

8 DATA6 High when active.

9 DATA7 High when active.

10 ACK 10µs low acknowledges receipt of data

11 BUSY Printer sets line low when ready to receive data.

12 PAPER High when paper runs out. Can be disabled with the user setup utility.

13 SELECT High when printer is on-line.

14 AFXT Normally high.

15 Not connected.

16 SIGNAL GND Signal ground

17 CHASSIS Chassis ground (isolated from signal ground)

18 +5V +5V DC output from printer

19 ~ 30 GND Twisted pair ground return

31 RESET Printer is reset when this signal goes low.

32 ERROR Low when printing cannot continue due to an error.

33 EXT GND External ground

34,35 Not connected

36 SELECT IN Normally low.

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