Star Micronics LS-5 SERIES Manuale utente

LASER PRINTER

LS-5 SERIES

TECHNICAL MANUAL

[SECOND 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 the laser printer as shown below.

It is intended for use as a reference for maintenance procedures.

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

•LS-5EX

•LS-5TT

•LS-5

This manual is divided into the following sections:

Chapter 1 General Specifications

Specifications, safety information

Chapter 2 Theory of Operation

A description of the principles of the electrical and mechanical systems and their functions

Chapter 3 Parts Replacement and Adjustments

Explanation of disassembly, reassembly, and adjustment procedures

Chapter 4 Maintenance Guide

Containsanoverviewofstepstoassistinrecoveringfromabreakdown,connectorlayoutdiagrams,wiring

connections, and other information helpful in maintenance operations.

Chapter 5 Troubleshooting

Contains breakdown analysis procedures used in repairing breakdowns.

Chapter 6 Parts List

Illustrations showing disassembly diagrams, part numbers, and part names

•First edition : Dec. 1992

Second edition : Feb. 1993 Add LS-5 model

– 2 –

GENERAL SPECIFICATIONS

CHAPTER 1

GENERAL SPECIFICATIONS

1. General Specifications..........................................................................................3

2. Pin Functions on Interfaces .................................................................................5

2-1. Parallel Interface ..................................................................................................... 5

2-2. Serial Interface........................................................................................................ 5

2-3. AppleTalk Interface................................................................................................. 5

3. Safety Information.................................................................................................6

3-1. Power Supply.......................................................................................................... 6

3-2. Drive Parts............................................................................................................... 6

3-3. Safety Devices ........................................................................................................ 6

3-4. Laser safety............................................................................................................. 7

4. Printer Components..............................................................................................8

– 2 –

GENERAL SPECIFICATIONS

– 3 –

GENERAL SPECIFICATIONS

1. General Specifications

(1) Type Desk-top page printer

(2) Printing method Electro photography

(3) Printing speed 5 pages/min (A4 size)

3.56 pages/min (legal size)

(4) Time for first print 27 seconds or less

(5) Warm-up time 1 min or less (after power on until the printer warms up at ambient

temperature of 20°C with rated AC voltage input)

(6) Optical system

Laser Semiconductor laser beam

Scanning system Rotating scanning mirror

Scanning pitch

Horizontal 300 dots/inch

Vertical 300 rasters/inch

(7) Printing system

Photosensitive drum OPC

Exposure method Laser scanning system

Paper feed Cassette feed

Front paper tray feed

Fusing method Thermal fusing by heated rollers

Toner supply Included in replaceable EPX toner cartridge

(8) Paper feed sources

Standard 250-sheet deck with cassette

50-sheet front paper tray

Option 250-sheet deck with cassette

500-sheet deck with cassette

(9) Paper

250 universal cassette

Paper size Letter (8.5" ×11"), A4, Executive, B5

Capacity 250 sheets, or maximum 27 mm loading height

250 legal cassette

Paper size Legal 14" (8.5" ×14"), Letter (8.5"×11")

Capacity 250 sheets

250 envelope cassette

Paper size COM-10, Monarch, DL, C5

Capacity 30 envelopes

500 letter cassette

Paper size Letter (8.5" ×11")

Capacity 500 sheets

500 A4 cassette

Paper size A4

Capacity 500 sheets

500 B5 cassette

Paper size B5

Capacity 500 sheets

Front tray

Paper size Letter (8.5"×11"), A4, Envelopes

Capacity 50 sheets or 5 envelopes

(10) Paper weight (plain paper)

Front paper tray 60 g/m2to 135 g/m2

Cassette feed 60 g/m2to 105 g/m2

(11) Print delivery Face-down

– 4 –

GENERAL SPECIFICATIONS

(12) Acoustic noise (in accordance with ISO 7779)

Stand by 37 dB or less

Printing 45 dB or less

(13) Environment

Printer with EPX toner cartridge

Operating temperature 5°C to 35°C

Operating humidity 15% to 85%RH (without condensation)

Storage temperature –20°C to 40°C

Storage humidity 5% to 95% (without condensation)

Altitude 0 to 8200 feet (0 to 2500 meters)

Printer without EPX toner cartridge

Storage temperature –20°C to 60°C

Storage humidity 5% to 95% (without condensation)

Altitude 0 to 49200 feet (0 to 15000 meters)

(14) Power consumption

100 - 115V Max. 450W

220 - 240V Max. 500W

(15) Printable area The guaranteed printing requires a margin of 4 mm from each edge of the

paper.

(16) Dimensions (W ×D ×H) 352mm ×393.5 mm ×253mm

(17) Weight Approx. 12kg (without EPX toner cartridge)

(18) Line voltage Rating Range

Voltage 100 - 115V 90 to 132V

220 - 240V 198 to 264V

Frequency 50/60Hz 47Hz to 63Hz

(19) Host interface

LS-5EX

Parallel Centronics

Serial RS-232C

Optional AppleTalk (when an optional ROM board MS is installed)

LS-5TT

Parallel Centronics

Serial RS-232C

AppleTalk

LS-5

Parallel Centronics

Serial RS-232C/RS-422A

(20) RAM

Resident 1MB (LS-5EX)

2MB (LS-5TT)

0.5MB (LS-5)

Option Max. 6MB on RAM expansion board (LS-5EX/TT)

Max. 4MB on RAM expansion board (LS-5)

(21) Emulation

LS-5EX Standard: PCL5 and GL/2(HP Laserjet 3)

Option: TrueImage (with optional ROM board MS)

LS-5TT PCL5 and GL/2(HP Laserjet 3)

TrueImage (Apple LaserWriter NTX)

LS-5 PCL4 (HP LaserJet IIP)

ESC/P (Epson FX-286)

(22) FontResident 14 bitmap fonts

8 scalable fonts (LS-5EX/TT)

35 TrueType scalable fonts (LS-5TT only)

Option Font cartridge

– 5 –

GENERAL SPECIFICATIONS

2. Pin Functions on Interfaces

2-1. Parallel Interface

Pin No. Signal Direction Function

Name

1 STROBE IN Goes from High to Low (for at least 0.5 microseconds) when data are valid.

2 DATA1 IN

3 DATA2 IN

4 DATA3 IN

5 DATA4 IN

6 DATA5 IN

7 DATA6 IN

8 DATA7 IN

9 DATA8 IN

10 ACK OUT A low pulse acknowledges receipt of data.

11 BUSY OUT Low when the printer is ready to receive data.

12 PAPER OUT OUT Goes High if the printer runs out of paper.

13 SELECTED OUT High when the printer is online.

14-15 N/C Unused

SIGNAL GND

Signal ground

CHASSIS GND

Printer’s chassis ground, isolated from signal ground.

18 +5VDC OUT External supply of +5VDC

19-30 GND Twisted pair return signal ground level.

31 PRIM IN LS-5 model does not check this signal.

LS-5EX and TT are not connected.

32 FAULT OUT Goes Low to signal that the printer cannot print due to an error condition.

33-36 N/C Unused. In case of LS-5 model, pin no. 33 and 35 are always HIGH.

2-2. Serial Interface

Pin No. Signal Direction Interface Function

Name

1 GND 232C/422A Chassis ground

2 TXD OUT RS-232C Transmitted data

3 RXD IN RS-232C Received data

RXD– IN RS-422A Received data–

4 RTS OUT RS-232C SPACE when the printer is ready to receive data.

But this printer does not check the signal.

5-6 N/C Unused

7 GND 232C/422A Signal Ground

8 N/C Unused

9 TXD+ OUT RS-422A Transmitted data+

10 TXD– OUT RS-422A Transmitted data–

11-17 N/C Unused

18 RXD+ IN RS-422A Received data+

19 N/C Unused

20 DTR OUT RS-232C SPACE when the printer is ready to receive data.

21-25 N/C Unused

2-3. AppleTalk Interface

Pin No. Signal Direction Function

Name

1 HSKo OUT Handshake out (always GND)

2 HSKi IN Handshake in

3 TXD– OUT Transmitted data –

4 GND Signal ground

5 RXD– IN Received data –

6 TXD+ OUT Transmitted data +

7 N/C Unused

8 RXD+ IN Received data +

Eight-bit character data. DATA8 is the most significant bit; DATA1 is the least significant bit.

High is logic 1 and low is logic 0.

– 6 –

GENERAL SPECIFICATIONS

3. Safety Information

Inorder to prevent accidentsfrom occurring while maintenanceis being carried out,all warnings and precautionsshould

be strictly observed while working. Never attempt any kind of dangerous work when servicing this machine.

The precautions noted below are only a few of the situations which could foreseeably occur during maintenance

operations. Please make sure every safety precaution is observed while working.

3-1. Power Supply

In order to prevent electrical shock, burns, damage to the equipment, and other problems, always make sure the power

supply is turned off and the power supply cable has been unplugged before maintenance work is carried out.

If the power must be left on in order to measure voltage or for other reasons, make sure sufficient precautions are taken

to prevent electrical shock, and follow the procedures noted in this manual.

3-2. Drive Parts

Inspection of drive section parts such as sprockets and gears should be carried out using a hand crank.

DANGER: Never inspect these parts while the equipment is in operation!

3-3. Safety Devices

Thorough consideration should be given to safety devices designed to prevent accidents (fuses, interlock switches, etc.)

as well as those handled by the user in the course of operating the equipment (covers, panels, etc.), in order to make sure

they fulfill their function as safety equipment.

DANGER: Inordertopreventexposuretothelaserbeamcontainedintheprinter,thefollowingprecautionsmustalways

be strictly observed.

Exposure to the laser beam can result in blindness.

•Never open cover (ROS assembly) that has the label of figure 1-2.

•When disassembling and adjusting the equipment, always make sure the power supply has been turned

off first.

•This equipment is provided with a two-stage safety switch function, so that it can be operated even with

the covers removed, by pressing the interlock switch. When using this method of operation, never short

the other switch at the same time (the second switch is pressed when the actuator at the back of the EPX

toner cartridge attachment section is pressed).

•When servicing the optical system of the printer, be careful not to place screwdrivers or other reflective

objects in the path of the laser beam.

Besuretotakeoffaccessories,suchaswatchesandrings,beforeworkingontheprinter.Areflectedbeam,

though invisible, can permanently damage your eyes.

Because the laser beam is invisible, be especially careful when servicing the optical system.

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