Star Micronics LC-8521 User manual

DOT MATRIX PRINTER

LC-8521

TECHNICAL MANUAL

[THIRDEDITION]

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 describes the LC-8521 dot matrix printer.

Itisdesignedforuseasareferenceforperiodicinspectionsandmaintenanceprocedurestobeexecutedby

servicepersonnel.Itisnotintendedforthegeneraluser.Usersofthismanualshouldhaveabasicknowledge

and understanding of the English language.

•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

•First edition : Mar. 1997

Second edition : Aug. 1997

Third edition : Nov. 1998

CHAPTER 1

GENERAL SPECIFICATIONS

1. General Spaecifications........................................................................................3

2. External Appearance and Composition ..............................................................5

3. Control Panel .........................................................................................................7

3-1. Switch Combination Functions ............................................................................. 7

3-2. EDS Mode Settings................................................................................................. 8

4. Parallel Interface..................................................................................................10

4-1. General Specifications ......................................................................................... 10

4-2. Connector Signals ................................................................................................ 10

5. Serial Interface.....................................................................................................11

5-1. General Specifications ......................................................................................... 11

5-2. Connector Signals and Functional Descriptions............................................... 11

6. Serial Interface - SPC-8K (Option) .....................................................................12

6-1. General Specifications ......................................................................................... 12

6-2. Connector Signals and Functional Descriptions............................................... 12

6-3. DIP Switch Settings .............................................................................................. 13

7. EE-PROM Mode ...................................................................................................14

7-1. Outline ................................................................................................................... 14

7-2. Explanation of Special Control Codes................................................................ 14

7-3. EE-PROM Map....................................................................................................... 15

7-4. Rewriting the EE-PROM ....................................................................................... 19

– 2 –

– 3 –

Printing System Serial Impact Dot-Matrix

Printing Speed Pitch HS-Draft (cps/dpi) Draft (cps/dpi) LQ (cps/dpi)

Pica (10 cpi) 400/80H 300/120H 100/360H

Elite (12 cpi) 360/120H 120/360H

Semi-condensed (15 cpi (S)) 450/120H 150/360H

Semi-condensed (15 cpi (I)) 212/240H 150/360H

Condensed pica (17 cpi) 242/240H 171/360H

Condensed elite (20 cpi) 283/240H 200/360H

24 cpi (I) 340/240H 240/360H

H: half-dot

(S): Standard mode only

(I): IBM mode only

Print Direction Draft: Bi-directional logic seeking

LQ: Bi-directional logic seeking

Bit-Image: Uni-directional/bi-directional logic seeking (selectable)

Print Head Number of pins: 24

Life: 200 million dots/pin (adjustment lever position 1 to 3)

100 million dots/pin (adjustment lever position 4 to 8)

Line Spacing 1/6″, 1/8″

7/60″, 7/72″, n/72″, n/180″, n/216″, n/360″: software

Character Matrix Pitch HS-Draft Draft LQ

Pica (10 cpi) 24×7Η 24 ×9H 24 ×31H

Elite (12 cpi) 24 ×9H 24 ×27H

Semi-condensed (15 cpi(S)) 16 ×7H 16 ×21H

Semi-condensed (15 cpi(I)) 24 ×9H 24 ×16H

Condensed pica (17 cpi) 24 ×9H 24 ×16H

Condensed elite (20 cpi) 24 ×9H 24 ×16H

24 cpi (I) 24 ×9H 24 ×14H

H: half-dot

(S): Standard mode only

(I): IBM mode only

Environment Operating temperature: 41˚F to 95˚F (5˚C to 35˚C)

Storage temperature: -22˚F to 149˚F (-30˚C to 65˚C)

Operating humidity: 30% to 80% (noncondensing)

Storage humidity: 20% to 90% (noncondensing)

Paper Cut-sheet

Paper width: 2″to 16.5″/ 51 to 420 mm

Paper length: 2.75″to 14″/ 70 to 356 mm

Paper weight (1-ply): 14 to 42 lbs / 52 to 156 g/m2/ 45 to 135 kg

Multi-part: 11 to 14 lbs / 40 to 52 g/m2/ 34 to 45 kg; pressure

sensitive paper

Total thickness: 0.014″/0.35mm

Copies: Original + 4

1. General Specifications

– 4 –

Fanfold

Paper width: 3″to 16″/ 76 to 406mm

Paper length 6″/ 152mm(min.)

Paper weight (1-ply): 14 to 22 lbs / 52 to 82 g/m2/ 45 to 70 kg

Multi-part: 11 to 14 lbs / 40 to 52 g/m2/ 34 to 45 kg; pressure

sensitive paper

Total thickness: 0.014″/ 0.35mm

Copies: Original + 4

Labels

Backing sheet: 3″to 16″/ 76 to 406mm

Thickness:

Backing sheet 0.0028″to 0.0035″/ 0.07 to 0.09mm

Total thickness 0.0075″/ 0.19mm max.

Envelope

#10 9.4″×4.1″/ 240 ×104mm

#6 6.5″×3.6″/ 166 ×92mm

Emulation Standard Mode: EPSON ESC/P (24-pin)

NEC Graphic Compatible

IBM Mode: Proprinter XL24E

Interface Standard: Centronics parallel

RS-232C serial

Ribbon Type On-carriage, dedicated

Monochrome: Black only

LZ24HD (Standard)

Ribbon Life LZ24HD: 4million characters (ASCII Draft)

Power Supply 110V AC +20%/-18%, 230V AC +14%/-13%; 50/60Hz (depending on country of

purchase)

Power Consumption 17W during stand-by

63W during ASCII draft printing

Options SPC-8K Serial-To-Parallel Converter

CT-15HA Push Tractor Unit

Fig. 1-1 External dimensions

650mm

240mm

333mm

25.6"

13.1"

9.5"

Weight: 28.7lbs/13kg

– 5 –

2. External Appearance and Composition

Fig. 1-3 Rear view of the Printer

Fig. 1-2 Front view of the Printer

Front cover

Adjustment lever

Paper guide

Release lever

Power switch

Document table

Control panel Platen knob

Parallel Interface

connector

Serial Interface

connector

– 6 –

Tractor

Carriage

Paper Feed Motor

Printer Mechanism

Carriage Motor

Ribbon Holder

Control Panel Board

Main Logic Board

Power Supply Unit

Fig. 1-4 Front cover removed

Ribbon Cartridge

Print Head

Platen

Gap Adjustment assy

Paper Feed Roller

Fig. 1-5 Diagram of internal layout

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