Epson LX-850, LX-810 Service Manual

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Page 1

LX-810/850

TECHNICAL MANUAL

EPSON

Page 2

NOTICE

Reprc~duction

of any part of this manual in any from

whatsoever without SEIKO EPSON’s express written permission is forbidden.

● 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.

However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

“ The above notwithstanding SEIKO EPSON can assume no responsibility for any

errors in this manual or the consequences thereof.

Nagano, Japan

Page 3

REV.-A

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damage

to equipment:

DANGER Signals a precaution which, if ignored, could result in serious or fatal personal

injury. Great caution should be exercised in performing procedures preceded by a DANGER headings.

WARNING Signals a precaution which, if ignored,

The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.

could result in damage to equipment.

DANGER

ALWAYS DISCONNECT THE F’RODUCT FROM BOTH THE POWER SOURCE AND THE

HOST COMPUTER PROCEDURE.

2. NO WORK SHOULD BE BASIC SAFETY MEASURES

THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT

CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

BEFORE PERFORMING ANY MAINTENANCE OR REPAIR

PERFC)RMED ON THE UNIT BY PERSONS UNFAMILIAR WITH

AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN

WARNING

REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON

CERTIFIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PROD-

UCT HAS A PRIMARY-AC RATING DIFFERENT FROM THE AVAILABLE POWER

SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EP’SON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS RECOMMENDED BY THE MANUFACTURER; INTRODUCTION OF SECOND-SOURCE ICS OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND

VOID ANY APPLICABLE EPSON WARRANTY.

/.LP

CHIPS AND CIRCUITRY, USE STATIC

Page 4

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the LX-8 10/850. The instructions and procedures included herein are intended for the experienced repair technician, precautions on the preceding page. The chapters are organized as follows:

and attention should be given to the

REV.-A

Chapter 1 -

Chapter 2 -

Chapter 3 -

Chapter 4 -

Chapter 5 -

Chapter 6 -

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

Provides a general product overview, lists specifications, and illustrates the main components of the printer.

Describes the theory of printer operation.

Discusses the options

Includes a step-by-step guide for product disassembly, assembly, and adjustment.

Provides Epson-approved techniques for troubleshooting.

Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.

Page 5

REVISION TABLE

REVISION DATE ISSUED

IMar

27, 1989

CHANGE DOCUMENT

1st issue

fy,

-...,,.;

. . . .

Page 6

REV.-A

CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4.

CHAPTER 5. CHAPTER 6. APPENDIX

GENERAL DESCRIPTION OPERATING PRINCIPLES OPTIONAL EQUIPMENTS DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT

TROUBLESHOOTING

MAINTENANCE

Page 7

CHAPTER 1

GENERAL DESCRIPTION

REV.-A

FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1

1.2

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1 Hardware Specifications

1.2.2 Firmware Specifications

INTERFACE

1.3

DIP SWITCH AND JUMPER SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4

1.4.1 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4.2 Jumper Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5

SELECTYPE

1.6

SHEET LOADING

1.7

TEAR-OFF FUNCTION

1.8

OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.8.1

1.8.2

1.8.3

1.8.4

1.8.5 MAIN

1.6

COMPONENTS

OVER\fl EW

FUNC1’ION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AND

Self-Test

Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Buzzer Operation

Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjust Lever Operation

(ESC/P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SHEET EJECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

... 1-1

. 1-3

1-3

1-10

1-12

1-15 . 1-15 . 1-15 . 1-16

1-17

. 1-18

1-18

1-19

1-20

. 1-21

1-21 1-22

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5

Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 1-5. Figure 1-6. Figure 1-7. Figure 1-8.

TAMA

Boarld

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TAPNL-W Control Panel

TA Filter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer Mechanism Housing

(M-3D1

O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 1-23

1-23

. 1-24 1-24

1-25

LIST OF FIGURES

Exterior View of the LX-810/850 Pin Configuration Cut-Sheet Printing Area

Printing Area for Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Roll Paper Printing Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self-Test Printout

Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 1-3 1-6

. 1-8

. 1-12

1-18

. 1-19

,-i

Page 8

REV.-A

Figure 1-9.

Figure 1-10. LX-810/850 Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

Figure 1-11. TAMA Main Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Figure 1-12. Figure 1-13. TA Filter Unit Figure 1-14. Figure 1-15. Housing

Lever Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TAPNL-VV

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model-3Dl

O Printer Mechanism

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-21

1-23

1-24

1-24 1-24

LIST OF TABLES

Table 1-1. Table 1-2. Table 1-3. Table 1-4. Table 1-5. Table 1-6.

interface Options Optional Unit

Cut-Sheet Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Roll Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

....................................................................m

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

l-l

1-1

1-4

. 1-5 .

Table 1-7. Table 1-8. Table 1-9.

Table 1-10. Column Width (maximum characters/line) . . . . . . . . . . . . . . . . . . . . 1-11

Table 1-11. Connector Pin Assignments and Signal Functions ..... 1-12

Table 1-12. Printer Select/Deselect Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1-13. Settings for DIP Switch 1 (SW 1)

Table 1-14. Settings for

Table 1-15. International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1-16. Lever Position

Label Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

printing Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Character Size

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DIP

Switch 2 (SW 2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5

. 1-10

1-1o

1-14

1-15

1-21

f:-?

Page 9

REV.-A

1.1

FEATURES

The LX-8 10/850 is a small, light-weight, low-cost, advanced paper handling printer comparable to the

LX-800. Its main features are:

Advanced paper handling: Auto

Expanded

Printing speeds: 200

Optional 8100 series interface Clear, easy-to-read printing with a standard EPSON font

Two built-in NLQ (Near Letter Quality) fonts (Roman and Saris Serif)

Control panel switch selection of Draft, Roman, or Saris Serif font

Control panel switch selection of normal or condensed printing

Control panel mode settingd are saved in non-volatile memory

Easy handling of cut sheets with

10.

LX-8 10/850 is equipped with the standard EPSON 8-bit parallel interface. Various interface options

The enable users to print data from a variety lists the optional units available for the LX-8 10/850, and Figure 1-1 shows an exterior view of the

LX-8 10/850.

ESC/P-code

printing, implemented as a standard feature

150 180

backout and cut sheet loading

cps (high speed draft)

CpS

(dri~ft

10 cpi)

CpS (dri~ft 12 cpi)

the optional cut-sheet feeder (CSF)

of computers. Table 1-1 lists the interface options, Table 1-2

Tablo

1-1. Interface Options

Model

Intelligent serial interface board

Enter faceboard

NOTE: Refer to the “Optional Interface Technical Manual” for details.

Model

C8061

C80006”

8310 Roll paper 8750

2* Single bin cut sheet feeder

Intelligent

Pull tractor unit

Ribbon cartridge (Black)

IE:EE-488 interface board

Table 1-2. Optional Units

holder

Description

1-1

Page 10

REV.-A

Figure 1-1. Exterior View of the LX-81 0/850

1-2

,..

’

Page 11

1.2 SPECIFICATIONS

REV.-A

This section describes LX-8 10/850

1.2.1

Hardware Specifications

Printing Method Pin Configuration

Serial, impact, dot matrix 9 wires (diameter

prinlter specifications.

0.29mm)

(

)

(

)

( )

(

)

#7 #8

0.29mm

0.35mm (1

/72”)

Figure 1-2. Pin Configuration

Feeding Method Friction

When handling paper, note the following precautions described below

Friction Feed Precautions:

1. Do not use continuous paper.

2. Do not use a single sheet shorter than 182mm or longer than

3. Do not perform any reverse paper feed within 8.5mm from the top, or 22mm from the bottom.

4. Do not perform reverse feed greater than 1/6 inch after the paper end is detected.

5. Use the pull-out unit.

6. Do not use multi-part single sheet forms.

Tractor Feed Precautions:

1. Release the friction feed mechanism.

2. Joining of copying paper must be by line or dotted pasting.

3. Copy paper must be a carbon-less, multi-part paper.

feed,

tractor feed (push tractor: standard, pull tractor: optional)

364mm.

1-3

Page 12

REV.-A

a. Push Tractor Feed

1. Use the pull-out unit.

2. Do not perform reverse

3. After paper end detection, accuracy of paper feed cannot be assured and reverse feeding cannot be performed.

b. Push Pull Feed

1. Remove the pull-out unit and attach the pull tractor unit.

2. Do not loosen the paper between the platen and pull tractor unit.

3. Adjust precisely the horizontal position of the pull and push tractor.

4. Do not perform reverse feeding greater than 1/6 inch.

5. Do not perform reverse feeding after

c. Pull Tractor Feed

1. Remove the pull-out unit and attach the pull tractor unit.

feeding greater than 1/6 inch.

the paper end is detected.

Line Spacing Paper Insertion Paper-Feed Speed

Width

Length

Thickness

Si_k&lL

Width Copies Quality Total Thickness Weight

1/6 inch, 1/’8 inch, or programmable in units of 1/216 inch From rear Approximately 95 ins/line (1/6 inch line feeding)

Approximately 75 ins/line (1/6 inch in page feed)

Paper Specifications See Table 1-3 through 1-6

Table 1-3. Cut-Sheet Specifications

182 mm to 257

182 mm to 364 mm (7.15 in. to 14.3 in.)

0.065 mm to 0.14 mm (0.0025 in. to 0.0055 in.)

14 lb. to 24 lb. (52.3 g/mz to 90

mm (7.15 in. to 10.1 in.)

g/m2)

Table 1-4. Continuous Paper Specifications

101 mm to 254 mm (4.0 in. to 10.0 in.) 3 sheets (1 original and 2 copies) Plain paper

0.065 mm to 0.25 mm (0.0025 in. to 0.01 in.)

sheet - 14 lb. to 22 lb., (52.3 g/m2 to 82

3 sheets -- 12 lb. to 15 lb., (40 g/mz to 58.2

g/m2)

each

Table 1-5. Roll Paper Specifications

Width Weight 14 lb. to 17 lb. (45 kg to 55 kg) Quality

Thickness

216 mm

Plain paper

0.07 mm to

& 3 mm (8.5 in. & 0.12 in.)

C).09

mm (0.0028 in. to 0.0035 in.)

1-4

Page 13

Table 1-6. Envelope Specifications

REV.-A

NOTES: “

Size

Weight 55Kg (68 Thickness O.19 mm (0.0075 in.) max.

Size

No.6 (166

Imm

x 92 mm), No. 10 (240 mm x 104 mm)

Quality Bond paper, Plain paper, Air mail

Thickness

0.16 mm to

0.52 mm (0.0063 in. to 0.0197 in.)

Difference of thickness within printing area must be less

than 0.25 rnm (0.0098 in.).

Weight 12 lb. to

lb. (45 g/m2 to 91 g/m2)

Envelope printing is only available at normal temperature.

Keep the long side of the envelope horizontal at setting.

Set the left of a

No.6 envelope at the setting mark of the sheet guide.

Table 1-7. Label Specifications

2 1/2 in. X 15/16 in. (63.5 mm X 23.8 mm)

g/m2)

Thickness excluding the base paper must be equal to or less than 0.12 mm (0.0075 in.).

NOTES:

“

Label printing is only available at normal temperature.

● Labels must be a fanfold type.

● For printing labels on pressure sensitive paper, the following conditions must be met: (1)

jointed by dotted or line pasting. (2) total thickness is equal to or less than

inch). (3) 5 degree C to 35 degree C and

10’%0

80’ZO

RH.

0.3mm

(0.01 18

1-5

Page 14

REV.-A

Printing Area

The figures

below show the printing area for cut sheets.

364mm max.

14.3

0.33 “ or

“ max.

182-257 mm(7. 2-10.1 “ )

*1 ) Printable area

8.5rnrY

“e

—

I n t a

I ~

r e a

ABC

. .

*1 )

XYZ

““

3../

—

● 1 ) At least 3.0 mm (O. 12 in.) when the paper width is less than 229 mm (9 in.); at least 24 mm (0.9

in.) when the paper width is 257 mm ( 10.1 in.)

●

Printing is possible approx. 28 mm from the paper’s detected bottom edge; the 13.5 mm value (lowest print position) is for reference only. Paper feed accuracy can not be assured within 22 mm

(0.87 in.) of either the top or bottom edge.

ABC

Figure 1

—

-:3.

Cut-Sheet Printing Area

XYZ

--l

~.=

1-6

Page 15

REV.-A

Printable

9mm,0.35

or more

9mm,0.35

Printable

area

“

mqre

area

,101 mm-254mm

Printable area

*1)

o 0 0 0

4.0 “ -10.0 “

0 0

ABC

0 0 0

----------------------------0

0 0 0

ABC

0 0 0 0 0 0

)(YZ

--------------

XYZ

*2)

o 0

0 0 0 0 0 0 0 0 0 0

-0

0 0 0 0

0 0 0 0 0 0 0

● 1) 13 mm or greater for paper widths of 101 - 242 mm (4 - 9.5. in.)

26 mm or greater for paper widths of 254 mm (10 in.)

*2) 13 mm or greater for paper widths of 101 - 242 mm (4 -9.5 in.)

24 mm or greater for paper widths of 254 mm (1 O in.)

Figure 1-4. Printing Area for Continuous Paper

1-7

Page 16

REV.-A

50m

min

60m

3rnm min.

‘1

Figure

2‘1 6mm(8.5 “)*

203.2mm

(printable area)

3mm(0.

AEIC

1-3.

Roll Paper Printing Area

12 “ )

3mm min.

XYZ

—

Ink Ribbon

Type:

Color: Reliability:

Reliability

Mean Cycles Between

Failure

Mean Time Between

Failure

Life of

Safety Approval

Safety Standards

Radio Frequency

Interference

(MCBF):

(MTBF):

Printhead

(RFI)

8750 Ribbon Cartridge Black 3 million characters at 14 dots/character

3 million lines (excluding printhead)

4000 POH

200 million

UL478

CSA22.2 VDE0806

FCC class B (U.S. version) VDE 0871

(2!5% duty)

:;trokes\wire

(U.S. version)

#;!20

(Canada version)

(TIJV) (European version)

(Self-certification)(

EurOPean version)

,,:

”,.

1-8

Page 17

Electrical Specifications

Power Conditions

Frequency Range Power Consumption insulation Resistance Dielectric Strength

120V Version

220/240V

Version

Environmental Conditions

Temperature

Humidity

Resistance to Shock

Resistance to Vibration

VAC & 10% (120V version)

120

220/240

49.5 to

VAC + 10%

60.!5 Hz

(220/240V

version)

28W (Draft self-test)

Mgohms min. (Between AC Line and Chassis)

(At 50 or 60 Hz, between the AC line and chassis)

1 KV AC

1.5KV AC

(rmslminute) (rms\l

O minutes) or 1250V AC

or 1250V AC

(rms/second)

(rms\second)

5 to 35 degrees C (41 to 95 degrees F) -operating –30 to 60 degrees C (-22 to 149 degrees F) -storage

10 to 80

5 to 85 %

1 G, within 1

2 G, within 1

RH (no condensation) –operating

FIH

(no condensation) -storage

mS -operating mS -storage

0.25 G, 55 Hz max. -operating

0.50 G, 55 Hz max. -storage

REV.-A

Physical Specifications

Weight

Dimensions

5.75 Kg 418 mm (Width) X 339 mm (Depth) X 141 excluding knobs and paper guides

mm(Height),

1-9

Page 18

REV.-A

1.2.2

Firmware Specifications

(ESC/P)

Control Code

ESWPTM level ESC/P-81

(EPSON Standard Code for Printers)

Printing Direction

Bi-directional printing with logic seeking (text) Uni-directional (left to right) printing (Bit-image)

Input data buffer

Character Set

4 K bytes

96 ASCII characters 96 Italic characters 32 International characters (13 countries) 32 International Italic characters 96 IBM Graphics characters

Font

EPSON EPSON EPSON

NLQ Roman

NLQ Saris Serif

Draft

Printing Speed See Table

Table 1-8. Printing Speed

Type of Letters

High Speed Draft Pica Elite Double-Width Emphasized

Double-Width Emphasizecl 37 Condensed Double-Width condensed Double-Width Elite

Condensed Elite

NLQ

Pica 25

NLQ

Elite

1.8

Print Speed

200

150 180

128

150

,,. :.,

{/-.

[cps)

Dot-matrix Format

Character Size

Pica 2.1 Elite Condensed Double-Width Pica Double-Width Elite Double-Width Condensed 2.1 Condensed Elite

Emphasized

Double-Width Emphasized

Super/Subscript Depends On Pitch

X $J Text mode (Draft)

18 X 20 Text mode

See Table 1-9

Type of Letters

(NLQ)

Table 1-9. Character Size

Width (mm)

1.7 3.1

1.05

4.2

3.4

0.85 3.1

2.1

4.2 3.1

1-10

Height (mm)

3.1

1.6

Page 19

REV.-A

Printing Columns

Pica Elite Condensed Double-Width Pica Double-Width emphasized Double-Width Elite Double-Width Condensed

(

Condensed Elite

Emphasized

See Table 1-10

Table

1-10. Column Width (maximum characters/line)

Type of Letters

Column Width

80 96

137

40 40 48 68

160 20

(CPL)

Column/inch

10 12 17

5 5 6

8.5

(cpi)

1-11

Page 20

REV.-A

1.3 INTERFACE OVERVIEW

The standard 8-bit parallel interface provided with this printer meets the specifications described below.

Data Format Synchronization Handshaking Signal Level

8-bit parallel By STROBE pulse By BUSY and

ACKNLG signal

TTL-compatible

Adaptable Connector 57-30360 (amphanol) or equivalent Data Transmission Timing See Figure 1-6

BUSY

{ ,/,, .

ACKNLG

DATA

STROBE

o.5#s

min.

Figure 1-6. Data Transmission Timing

Table 1-11 shows the connector pin assignments and signal functions of the 8-bit parallel interface.

Pin No.

3 4 5 6 7 8 9

11 12

Table 1-11. Connector Pin Assignments and Signal Functions

Signal Name

STRORE

DATA 1

DATA 2 DATA 3

DATA 4 DATA 5 24 DATA 6 25 DATA 7 DATA 8

ACKNLG

BUSY

SLCT

Return Pin No. DIR Functional Description

21 22 23

Strobe pulse to read the input data. Pulse width must

0.5,us.

be more than of this signal.

Parallel input data to the printer.

“HIGH” level means data “ 1“.

“LOW” level means data “O”.

Input data is latched at falling edge

28 out This pulse indicates data is received and ready to

accept next data.

29 out 30 out

Pulse width is “HIGH” “HIGH” indicates paper-out.

121.M

indecates

approx.

printer cannot accept next data.

This signal is effective only when ERROR signal is

“LOW”.

—

out

Always

3.3kohms register.)

“HIGH” output. (Pulled up to

+5V

through

1-12

Page 21

Table 1-11. Connector Pin Assignments and Signal Functions (Cont.)

REV.-A

Pin No.

Signal Name Return Pin No.

AUTOFEED-XT

15 16 17

Chassis

9 to 30

31 I NIT

32 33 34

Functional Description

feed is

—

DIR

if “LOW” when the printer is initialized, a line

automatically performed by input of “CR” code. (Auto LF)

Not used

GND

— —

Ground for twisted-pair grounding Chassis ground level of printer Not used

GND

ERROR out “LOW” indicates some error is occurred in the printer.

GND

—

SLCT-IN

—

Grounds for twisted-pair grounding

50#s

Pulse (Width:

initialization.

—

Ground for twisted-pair grounding

—

Not

used

out Always “HIGH”. (Pulled up to

min., active “LOW”) input for printer

+5V

through 3.3 Kohms

control is disabled.

NOTES: 1. “DIR” refers to the direction of the signal flow as viewed from the printer.

2. “Return” denotes a twisted-pair return line.

The cable used must be shielded to prevent noise.

4. All interface conditions are based on TTL levels. Both the rise and fall times of all signals

must be less than 0.2 us.

5. The AUTO FEED-XT signal

6. The SELECT-IN signal can

7. Printing tests, including interface circuit tests, can be performed without using external equipment by setting DATA 1-8 of the interface connector to certain codes and connecting the ACKNLG signal to the

c:an

be set LOW by DIP switch 2-4.

ble

set LOW by jumper 1.

STROBE signal.

1-13

Page 22

REV.-A

Table 1-12 shows Printer Select/Deselect (DC

SELECT-IN input, DC

l/DC3

and interface signals.

l/DC3)

controL including relations amon9 ON-LINE, .

Table 1-12. Printer Select/Deselect Control

ON-LINE SW

OFF-LINE

ON-LINE

SLCT-IN

HIGH/LOW

HIGH

LOW

Dcl/Dc3

l/DC3

DC 1

DC3

DC 1

DC3 HIGH

ERROR

LOW

HIGH

BUSY

HIGH

LOW/HIGH (During data after entry entry)

LOW/HIGH

(During data entry)

LOW/HIGH (During data entry)

ACKNLG

No pulse

Pulse output

Pulse output Enable (Waits

Pulse output

after entry

Pulse output after entry

DATA ENTRY Disable

Enable(Normal Process)

DC 1. See Note

Enable (Nor-

mal

process)

NOTES: 1. In Table 1-12, it is assumed that no ERROR status exists other than that attributable to the

OFF-LINE mode.

2, Once the printer has been put in the deselected state by the DC3 code, the printer will

not revert to the selected state unless the DC 1 code is input again. (In the deselected state, the printer ignores input data until the DC 1 code is received.)

3. The DC 1 and for the parallel interface

4. if the

5. If the

SLCT-IN signal is LOW when the printer is initialized,

select control is invalidated, and these control codes are ignored.

SLCT-IN signal is HIGH and is not set to LOW by jumper 1 when the printer is

initialized, the printer starts from the selected (DC 1 ) state.

DC3 codes are enabled only when the SLCT-IN signal (Input Connector No.36

unit) is HIGH and printer power is initialized.

DC1/DC3

printer select/de-

1-14

Page 23

1.4 DIP SWITCH AND JUNIPER SETTINGS

This section describes DIP switch settings for the LX-8 10/850 printer.

1.4.1 DIP Switch Settings

The two DIP switches are located on the side of the printer and function as shown in Tables 1-13 through

1-15. Note that the status of the DIP

switc:hes is read only at power on or upon receipt of the I NIT signal.

Table 1-13. Settings for

No.

1 I Character Pitch

Shape of Zero

Table Selection (note)

3 4 I Tear Off

Description

When the DIP switch is set for the Italic table, at power on printer defaults to ESC 7 table. When

the switch is set for the Graphic table, at power on it defaults to

Table 1-14. Settings for DIP Switch 2

No.

Page length

Cut-Sheet Feeder

l-inch skip On

3 4 AUTO FEED XT Signal Internally Fixed or

Description

(CSF)

Mode

D!P

Switch 1

‘

Fixed to LOW

cpi

Graphics

Invalid

Normal

See Table 1-15

12 in.

(SW1)

OFF

Italics

Valid

“gh

(SW2)

OFF

11 in.

off OFF off

Depends On

ternal Signal

cpi

Fectory Setting

ESC 6 table.

Factory Setting

Ex-

OFF OFF OFF

OFF

:’

OFF

Table 1-15. International Character Set Selection

1-6 1-7 1-8 On I On I On

1.4.2 Jumper Setting

Jumper 1 (user-selectable) is located on the TAMA board. If the jumper is connected, the is fixed to LOW, and DC 1

/DC3

printer select control is ignored.

Country

U.S.A

1-6 1-7

Off ] On I On

1-15

1-8

Country

Denmark 1

SLCT-IN

signal

Page 24

REV.-A

1.5

SELECTYPE

FUNCTION

SelecType

selection of Draft, Roman, or Saris Serif fonts and selection of normal printing or condensed printing

modes.

To select Roman or Saris Serif, press the When it sounds twice, the Roman font is selected. When it sounds three times, the Saris Serif font is selected.

To select the Draft font, press the DRAFT button. The buzzer will sound once, indicating that the DRAFT font is selected.

To set for condensed printing when the printer is in the print mode, press the CONDENSED button once (the buzzer will sound once), and the printer will enter the condensed print mode.

O cancel condensed printing, press the CONDENSED button again. After

buzzer sounds twice to tell you that condensed printing is cancelled.

allows the user to choose fonts and the printing mode easily. This function provides for

SelecType

is effective only when the printer is ON LINE and not printing.

NLQ button. A buzzer sounds when the NLQ button is pressed.

YOU

press the button, the ,. ~

1.6 SHEET LOADING AND SHEET EJECTION

The release lever enables disengaging of the push tractor unit drive mechanism. The printer therefore provides some improved paper-handling functions through combination of the release-lever and LOAD/EJECT control panel switch.

‘g,,,

Cut Sheet Loading And Ejection

To load a sheet of paper, position the paper release lever back, place the sheet along the paper guide, and press the LOAD/EJECT switch. This loads the paper to the top-of-form position.

Pressing the LOAD/EJECT switch after the paper has been loaded will cause the paper to be ejected.

Continuous Paper Loading And Ejection (Back-out)

To load fanfold paper, move the paper release Iever forward, and insert the paper into the push tractor.

~:,

Pressing the LOAD/EJECT switch will then cause paper to be automatically loaded to the top-of-form position. Pressing the LOAD/EJECT switch after the fanfold paper has been loaded will cause the printer

to eject the paper backward from the push tractor. To back out several pages, press the LOAD/EJECT

switch several times (reverse feed is performed on a page-by-page basis).

ON-LINE LED will flash only when the paper is loaded and the ON-LINE switch pressed. This indicates

The

that the printer has entered “Top-of-form adjust” mode, and that the user may adjust the top-of-form

position, as well as the loading positions for subsequent forms. Adjustment is made using the FORM

FEED button, which will increment the paper forward, and the LINE FEED switch, which will increment the paper in reverse. (The minimum feed amount is 2/216 inch).

When cut sheet is used, the adjusted Top-of-form position will be lost when the printer is re-initialized,

and the Top-of from will be reset to the default value. When continuous memory of the adjusted Top-of-form position will be retained even after

paper is used, however, the

printer initialization.

.,.

1-16

Page 25

REV.-A

1.7 TEAR-OFF

The Tear-Off function when the release-lever is set to the tractor position. In such a case, and the printer is LED will flash to indicate that the FORM FEED and LINE FEED switches are now available to perform

micro-adjustment. The user may then adjust the paper to the tear-off position. This position becomes the new tear-off position default, and will remain valid even if the printer is reset and reinitialized, and regardless of whether the main power has been interrupted. When new data are input to the printer, the paper will automatically be returned to its original position, and printing will then start. Paper having been advanced to the tear-off position will also be returned to its original position if the ON-LINE switch is pressed (switching the printer from ON-LINE to OFF-LINE).

FUNCTION

can be enabled by making the appropriate DIP switch setting, and will operate

if the input data buffer is empty

ON-LINIE,

the paper

will

automatically be fed to the tear-off position, and the ON-LINE

1-17

Page 26

REV.-A

1.8 OPERATING INSTRUCTIONS

This section describes the self-test, hexadecimal dump

functions,

error states, printer initialization,

and

buzzer operation.

1.8.1 Self-Test

To begin printing the self-test in the Draft mode, turn the printer ON while pressing the LIN E-FEED button.

To begin printing the self-test using the

it down, then turn the printer power ON.

Self-test printing can be stopped or started by pressing ON-LINE (ON-LINE indicator is not lit). To finish

the self-test, stop the printing by pressing the ON-LINE switch then turn OFF the printer power.

The firmware revision number is printed as the first line of the self-test, switch settings are printed.

Xxxxxxxx

Character

Shape CG

Short Tear-off

Draft Print Speed High Country Page Length

CSF Mode

Skip Perforation Auto LF

“’P$%&” #$%&” $%&” %&’

&” ( ) *+, -./0 123456789: :

. ( ( )%+, -. /0123456789: ; <=>?@ABC )*+ ,-.

r+,

+ ,- ./0 123456769: ; <=>?

.-./0123456769: ;<=>?@ABCDEFGHIJKMOPQRSmXYZ[\l--`abcdefshijkl~0MrStU-YZ{

-./0123456769: ./0123456789:

/0123456769: ;<=>?@ABCDEFGHIJKIJlNOPQRSTWWX 0123458789: ;<=>?@ABCDEFGHIJKLKNOPQRSTUVWX

123456789: ;<.>?@ABCDEFGHIJKNNOPQRS~~YZ[i]:-=abcdefg~ij~lmopq~etuwyz{ :}-

23458789: 3456789: 456769: 56789: 6789: 769: 89: 9:

:;c.>?9ABCDEFGHIJKUlNOPQRSTUW4XYZ[\] ‘–.abcdefghijklmnopqretuv’wxyz( ;};<=>?@ABCDEFGHIJKl14NOPQRSTtIVWXYZ[\]

<=>?@ABCDKFGHIJK~NOpQRs~ =>?13ABCDEFGHIJKLM?40PQRS

>?@ABCDEFGHIJKLJ4NOpQRSTUVWXYZ[\] ?@ABCDEFGHIJKLllNOPQRSTUVWKY

@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]

ABCDEFGHIJKLMNOPQRSTUVWX

BCDEFGHIJKLMNOPQRSTUVWXYZ[\l ‘-.

CDEFGHIJKLMNOPQRSTUVWX DEFGHIJKL4fNOPQRSTW.WKYZ[\l--’abcdefghijklmnopqrstuvwxyz( ;}- !“#$X&-()*+,- ./OlZ34 EFGHIJKLtiNOPQRS’fU%?4X FGHIJKMINOFQFiSTWWXY

GHIJKLMNOPQESTWWXY

HIJKLHNOPQRSTUVWX

IJKLMNOPQRSTWWXY

JKLM140PQRSTWWKY KLMNOPQRSTUVWXY

LMNOPQRS1’UWX

MNOPQRSTUV!4X YZ[\]-_” abcdefghijklmnopqretuvwxyz{ 1}NOPQRSTUVWKY OPQRSTUVWX

PQRSTUVWKYZ[\l -_”abcdefghijklmmopqrotuvwxyz{ ;}QRSTUVWXYZ[\l --’abcdefghijklmnopqrstuvwxyz{ 1}RSTUVWXYZ[\l --’abcdefahlklmnocarstuwxyz(z( !?STUVWXYZ[il:-=abcdefgiiijklmno:a;stuvwxy;{ ~i; !“#ti’()*+,~ .>01234567, TUVWXYZ[\l --’abcdefghijklmnopZrstuvwxyz{ ;}- !“#w&”()*+,- ./Ol2345678: WWXYZ[\l

VWXYZ[\]–-’abcdefghijklmnoaratuvwxyz(z( ;}-

Spacing

of Zero

Table

“U$%&”

( )*+, -. /0123456789: ; <=>%ABCDEFGHIJKIMNOPQRSTUVWKY

“FF$.%&”

(

)*+,

-. /0123456769: ;

(

)*+,

-. /01234567.99: ;

(

)*+,

- ./0123456769: ;

( )*+, -. /0123456769: ;

( )*+, -. /0123456789: ;

)*+,

-. /0123456769, ;

/o12345678g

-. /012345.5789: ;

;<=>?SIABCDEFGHIJKUINOPQRSTW!4K

;<=>?@ABCDEFGHIJKU!NOP,WS

;<=>?@ABCDEFGHIJKLMNOPQRSTWVWX

:<=>?@ABCDEFGHIJKLtlNOPQESTUVWX

;<=>?@ABCDEFGHIJKLJlNOPQR31’UV!4K

;<=>?@ABcDEFGHIJKLrlNoPQRs17JVw’n

;<.>?@ABCDEFGHIJKLMNOPQRSTUWXYZ[\] “–’abcdefghijklmnopqrstuvwxyz{ t}- !“#3Xd-()

YZ[\l-–’abcdefghijklmnopqr6tu%wxyz{

”_’abcdefghijklmnonratuvwxyz{ 1}-

: ;

<=>?@ABCDEFOmlIJKLMNOPQRSTOVWX

;<=>7@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\l ‘–’abcdefghijklmnopqrstuvwxYz( :

:<=>?@ABCDEFGHIJK~OPQRSWXYZ[\l---abcdefghijklmonrstuwyz( ;}

;<=>?IPABCDEFGHIJKLHN3PQRSTUVWX

Z[\l ”-’abcdefghijklmnopqrc.tuvuxyz( )}- !“#$Xd” ()*.,-./Ol234567

YZ[\l ”-’abcdefghijklmnopqrstuvwxyz( ~}- !-#s%&-OZ+,-

Z[\l--’ abcdefghijklmnopqretuvwxyz( 1}-

Z[\l--’ abcdefghijklmnopqrstuvwxyz( 1}- ?“#sx.4’()*+, -./Ol23456789:

Z[\l-–’abcdefghijklmmopqratuwxyz( !}-

YZ[\]--’abcdefghijklmnopqrstuvwxyz{ ;)-

Z[\]-–’abcdefghijklmnopqratuvwxyz{ :}-

hlLQ

mode (Near Letter Quality), press FORM FEED and hold

and subsequently, current DIP

10 CPI

(Unalashed

Italics

Valid

U.S.A.

11 inch

Invalid None Depend on I/F

<=>?3ABCDEFOHIJKLMNOPQRS3’WJWX

<=>?6%W,CDEFGHIJKLMNOPQRSTUVWX

<=>?@ASCD8FGHI JKLMNoPQRSTUVWK

<.>?@tABCDEFGHI JKLMNOPQRS’fUVWXYZ

<=>?@ABCDEFGHIJKU4NOPQRSTUVWK

<=>?@ABCDEFGHIJKLMNOPQRSTOVWX

QABCDEFGHIJKLMNOPQRSTUVWXY

YZ[\l--’abcdefghijklmnopqrstuvwxyz( :}- !“#$X&-()*+,

TUTWXYZ[\l --’abcdefghijklmnopqratuvwxyz{ :}- !“#$Xd”()*+,-

Z[\]”-’abcdefghijklmnopqrstuvwxyz( ~}- !“#$xA”()*+,-./

“-.

YZ[\]”-’

YZ[\l--’abcdefghijklmnopqratuvwxyz( ;}- .I’’#$XA ”()*+,-./Ol23

YZ[\l ”–’abcdeft!hi3klmnowr8tuvwxyz{ !)- ?“#sx&-OX+.-. /O12345 Z[<l:_=abcdef~ijklmii~~ituwyz( ~j: r“#$X&”

1-1

)

<=>?@ABCDEFGHIJKLMNOPQRSTUVWX

<=>?@ABCDEFGHIJKMINOPQRSTTJVWX

DEFGHIJKLMNOPQRSTUVWXY

TUVWXYZ[\]--’abcdefghijklmnopqretuvwxyz{ ;}- !“#$

‘–.

‘-.

abcdefghijklmnopqretuwyz(

abcdefghijklmnopqrstuvwxyz{ !}- !“#s%&”OX+,-./Oli?

OFF

1-2 OFF

1-3

oFF

1-4 oFF 1-5 oFF 1-6 ON 1-7 ON 1-6 ON

2-1 OFF 2-2 OFF 2-3 OFF 2-4 OFF

YZ [\ Z [\] ‘-”

YZ[\l

YZ 1 \ 1‘_

Z[\l

YZ[\l-–”abcdefghi$klmnopqretuvwxYz{ ~}-

YZr\l- ‘abcdefghi~klmnopmstuvwwz{ :}-

YZ[\]-–’nbcdefghijklmnopqretuvwxyz{ ;?- !“

YZ[\]-_’abcdefghijklmnopqrstuvwxyz{ ;)- !“#

YZ[\l--abcdefghijklmnopqrotuwyz{

YZ[\l--’abcdef8hijklmnopqretuwxYz{ !}- !“#$Z4 YZ[\l ”–’abcdefghijklumopqrntuvwxYz{ 1}- !“#SXd” Z[\l-–’abcdefghijklmnopqratuvwxYz{ 1}- !“#$XA’(

abcdefghijklmnopqratuvwxyz{ ;}- !“#SXA”f)*+

abcdefghijklmnopqretuvwxyz{ 1}- !“#$%&”()*+,-.

abcdefghijklmnopqretu..’wxyz{ ;}- ?“#$x&’()*+,-./O

!,,#$x’&-(),+, -./0123456789:;<=>

;}

!“#$X&-()*+, -./O123456789: ;<=>?@

!“#$Xd’()*+, -./Ol23456789: ;<=>?.9A

!’”#s.&4”()*+. -./Ol23456789:

!-X$X& -()*+.

!“#$X&o (]Jr+,- ./o1234567sg:

Z[\l

‘–’

YZ[\l

YZ[\l‘–“abcdefgbijklmopq

YZC\I ‘-=abcdefg~ijklmmopqr

YZ [\]

YZ [ \ 1‘–

[ \ 1‘–.

]:-yabcdef giij klmnopqratuv

‘-”

abcdef ghl.lklnmopqrstuvwx

abcdefghijklmnopqratuwxY

”

abcdefghijklmnopqretuvwxYz

!“#$x&”

!“#SXd”

()*+.- ./O123456769: ;

!“#$X&-

OX+,-.

! ,,#SX&-OX+,,,#$x&.OX+,- ./OIZ3456789:;<=>?

-./OlZ3456789

abcdefshijklmno

‘-’

abcdefghijklmnop

abcdefghijklmnopqre

abcdef ghij klmnopqrat

abcdefghld klmnopqratu

abcdefghi.lklmnopqratuvw

;}- !“#S.%

{“#S=-()~

1}- !-S$Xd-()*+.-./Ol

()*+,-./Ol23456

./O12345676

()*+,- ./Ol23458789

/OZZ345S789: ;<

./OLZ34567S9:;<=

:<=>?@AB

;<=>WABC

: ;

<=>

;

<=>?W4ECDE

<=>?WBC7DEF

IWABCD

i&,””

Figure l-7. Self-Test Printout

1-18

Page 27

1.8.2 Hexadecimal Dump Function

REV.-A

The printer enters the HEX-DUMP mode when it is powered

on while the LINE-FEED

and FORM-FEED

buttons are pressed down.

the

In the HEX-DUMP mode, the hexadecimal representation of

input data is printed out, along with

corresponding ASCII characters. This function is valuable for checking the data the printer has received from the host. If input data is a control code rather than a character code, a period (.) is printed in the ASCII column.

r),<{ ,:! r?,..,.<),,:,

!“IC.,,IC:,

,,($,, ,, IL

“,’.:

,..

,, ,,,,,,, ,., ..,

Clllal,’’rr:.rv

<::~ f:i.c<at,i,cms (1+ /1,,

) ,, .,1.

fYI,r

D I

JE[::

‘11::.AI,V [.)

.I’blr; ‘1’

1.1%, ,. 1.

“ .

I/J.

.,1”1

1, .

.::.:

1,1..IIw

[:m.t..

:1. ,, A SIH:::E!:’I

IN!:< {+141) !Wlx r’ K..

1’:l,

(.)11

,...

F’1,” l’,

1.11.1!:: ! :1’

bl!’;’l’F:ll [::’1’T1’)

I...(]fi

:1. .,7

,,0,,

(:;

:[i.’r

i. j.

!.,,,

L;,,.1

1’,

!’:1.,, ?.(:,,

f,i::

[

20 6(::

6:?

/,[::

4(:)

<,:1

;.,, O

6:1.

‘7:;

:!()

‘7:!

(,2

‘;?:$ 61.;

fi:j

.’!(:

41:,’

61.

61) 61.

<!,8 ‘7.! ’74

7:! ;’?()

Figure 1-8. Hexadecimal Dump Function

.1:,>$ t

1-19

Page 28

REV.-A

1.8.3 Buzzer Operation

The buzzer sounds under the following conditions:

BEL

code: Carriage trouble: Paper-out: Abnormal voltage: Incorrect RAM:

The buzzer sounds for 0.1 second when a

Beeps 6 times, pausing briefly after 3rd beep. Beeps 20 times, pausing briefly after every 4 beeps. Beeps 5 times, pausing after every beep.

(SRAM) Beeps 8 times, pausing briefly after every 2 beeps. (Inside CPU)

Beeps indefinitely until

Recognition of panel operation:

Beeps 1 or 2 or 3 times in setting print mode.

Factory setting:

Sheet ejection failure (in CSF mode):

Illegal paper

releaselunrelease:

Beeps once when the value under micro-adjusting is equal to the factory-set value.

Beeps 20 times, pausing briefly after every 4 beeps.

Beeps continuously when the paper release lever is changed when the paper is in the paper path. Beeps until the lever is changed again or the paper is completely out of the path.

power OFF.

BEL code is input.

$,”.

1-20

Page 29

REV.-A

1.8.4 Printer Initialization

The printer is initialized when:

1 ) AC power is turned on

2) The INIT signal is input

Here is a brief summary of the initialization sequence. a)

Return the printhead to the Ieftmclst position.

Set ON LINE mode.

Clear the print buffer and input buffer.

Set the line spacing to 1/6 inches.

Set the page length to 11 or 12 inches according to the DIP switch setting. Clear all vertical tab positions.

Set the horizontal tab position at 13-column intervals.

9) h)

Set the print mode according to tlhe DIP switch setting and the non-volatile memory setting of the control panel.

1.8.5

Adjust Lever Operation

The adjust lever must be set to the proper position according to the paper of paper you are using. Refer to Table 1-16 and Figure 1-9 below.

Table 1-16. Lever Position

~Adjust

Paper

Lever

Lever Position

2nd step

3rd step 4th step 4th to 7th step

● If printing density becomes Ii!ghter, set the adjust lever position one step narrower.

Cut sheet, continuous paper (non copy, 1 + 1 copy) Continuous paper (1 +2 copies) Label

Envelope

2’ndl

position

4’th position

f;’-’

t, )}

<.41 I

l..

““~

l’.

$..;/’

pi,

~“

‘

Figure 1-9. Lever Position

1-21

Page 30

REV.-A

1.6 MAIN COMPONENTS

The main components of the LX-8 10/850 printer are designed for easy removal and replacement to

maintain/repair the printer.

The main components are:

1 ) TAMA board: Main control board. The CPU on this board controls all main functions.

2) TAPNL-W control panel: Control panel.

3) TA filter unit: Transformer and filter board.

M-3D 10: Printer mechanism.

MA board

Filter Unit

. . .

t..

Figure 1-10. 1.X-81 0/850 Component Layout

Printer

—

Mechanis

M-3D

1-22

Page 31

1.6.1 TAMA Board

REV.-A

The use of the

~PD78

10HG CPU simplifies the main control board circuit design.

. PROM (3C)

(3D)

-SRAM

Gate Array

E05430 (3B)

- CPU

LPD78 10HG

(2C)

1.6.2

The

TAPNL-W

switches.

TAPNL-W

control panel is the LX-8 10/850 control panel which contains the indicator LEDs and

Figure 1-II 1.

Control Panel

Figure

TAMA

1-12.

TAPNL-W Control Panel

Main Control Board

1-23

Page 32

REV.-A

1.6.3

TA Filter Unit

The TA filter unit contains a power cord ( 120V Version) or AC inlet

fuse, filter circuit, and power transformer.

(220V

(120V Version)

Version)

Figure 1-13. TA Filter Unit

1.6.4 Printer Mechanism (M-3D1O)

The M-3D 10 printer mechanism was developed specifically

include:

Carriage motor Carriage mechanism Paper feed motor Paper feed mechanism Ribbon feed mechanism Printhead Sensors

for the LX-8 10/850 printer. Its components

(220/240V

(240V

Version), power switch

Version)

Figure 1-14. Nlodel-3Dl O Printer Mechanism

1-24

Page 33

REV.-A

1.6.5 Housing

The LX-8 10/850 housing consists of the upper and lower cases. The upper case houses the control

panel. The lower case houses the printer mechanism and the main control board.

f:igure

1-15. Housing

1-25

Page 34

CHAPTER 2

PRINCIPLES OF OPERATION

REV.-A

2.1

OVERVIEW

2.1.1 Connector Summary

2.1.2 Outline of Printer Mechanism Operation . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1.3 Circuit Overview

2.2

PRINCIPLES OF OPERATION

2.2.1 Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 Reset Circuit

2.2.3 Carriage Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1.2.1 Sensors

2.1.2.2

2.1.2.3

2.2.1.1 TA Filter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1.2 + 12V DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . 2-12

2.2.1.3

2.2.1.4 +5A/ DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.2.2.1 Power-on Reset

2.2.2.2 Operation at Reset

2.2.2.3 Power-off Reset

Mc~tors

Printhead

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+2!4V

DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . 2-13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1

2-4 2-7

2-7

2-8 2-10

2-10

2-11

2-20 2-20 2-21 2-21 2-22

2.2.3.1 Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

2.2.3.2 Carriage Motor Specification

2.2.3.3 Carriage Motor Drive Circuit Block Diagram

2.2.3.4 Carriage Motor Drive Circuit

2.2.3.5 Carriage Motor Software Control ................. 2-32

2.2.4 Paper Feed

2.2.4.1 Paper Feed Mechanism Operation ................ 2-35

2.2.4.2 Paper-Feed Motor Specifications ................... 2-36

2.2.4.3 Paper-Feed Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . 2-37

2.2.4.4 Paper-Feed Motor Software Control ............. 2-38

2.2.5

Printhead

2.2.5.1

2.2.5.2

2.2.5.3

2.2.5.4 Gate Array E05A30 Operation in

Printhead Printhead

Printhead

Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printing Operation

Specification

Drive Circuit Block Diagram ....... 2-40

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printhead

2-22

2-23 2-24

2-35

2-39

2-40

2-i

Page 35

REV.-A

2.2.5.5

2.2.5.6

2.2.6 Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.7 EEPROM Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.8 Ribbon-Feed Mechanism

Printhead

Software Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

Drive Circuit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-41

2-44

2-45

2-46

LIST OF FIGURES

Figure 2-1. Figure 2-2. Figure 2-3.

Figure 2-4.

Figure 2-5. Figure 2-6. Figure 2-7.

Figure 2-8.

Figure 2-9. Printhead Figure 2-10. TAMA Board Block Diagram

Figure 2-11. Power Supply Circuit Block Diagram Figure 2-12. Transformer Circuit

Figure 2-13. + 12V DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-14. Figure 2-15. Rectifier and Smoothing Circuit Figure 2-16. Figure 2-17. Voltage Feedback Circuit Figure 2-18. Over-Current Protection Circuit Figure 2-19. Output Transistor Drvie Waveform

Figure 2-20. Chopping Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-21. Figure 2-22. Reset Circuit

Figure 2-23. RESET Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-24. Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-25. Carriage Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Figure 2-26. Carriage

Figure 2-27. SLA 7020M Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25

Figure 2-28. Phase Data Input Circuit (2-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Figure 2-29. Phase Signal Timing Chart (2-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Figure 2-30. Phase Data Input Circuit (l-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Figure 2-31. Phase Signal Timing Chart (l-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Figure 2-32. Reference Voltage Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

Figure 2-33. Constant Current Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

Figure 2-34. Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-35. Carriage Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer Paper-End

Paper-End Sensor

Home-Position Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Home-Position Sensor Circuit Release Sensor Mechanism

Release Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+24V

DC Power

+24DC

+5V

Mechi~nisrn

Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SupPly

Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Switching Regulator Circuit

DC Power Supply Circuit

Motor

Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Block Diagram

Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2

2-3

2-4

2-5 2-6

2-6

2-7

2-8 2-10 2-11

2-12 2-13

2-13 2-14 2-15 2-16 2-17

. 2-18

2-19 2-20

. 2-20

2-22

. 2-30

2-33

.., ,.,

,,, ,

Z.ii

Page 36

REV.-A

Figure 2-36. Figure 2-37. Figure 2-38. Figure 2-39. Figure 2-40.

Figure 2-41. Figure 2-42. Figure 2-43. Figure 2-44. Figure 2-45. Figure 2-46. Figure 2-47. Figure 2-48.

Figure 2-49. Figure 2-50. Figure 2-51.

Home-PositionSeak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printing Area and Printing Timing

Friction-Feed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Push Tractor Feed Operation

Paper-Feed Motor Drive Circuit Paper-Feed Motor Drive Timing Chart

Printhead

Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39

Printhead Printhead Printhead Driving

Print Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A/D Converter Relationship between Head Driver Voltage and

Print Driving Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Host Interface

EEPROM Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ribbon-Feed Mechanism

Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-40

Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Waveforms

(+24V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VDC Line Monitor) Circuit ..... 2-42

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-33

2-34

2-35 2-36 2-37 2-38

2-47

2-41

2-42

2-43

2-44

2-45

2-46

LIST OF TABLES

Table 2-1. Table 2-2. Table 2-3.

Table 2-4. Table 2-5. Table 2-6. Table 2-7.

Table 2-8.

Board Connecl:or Summary

Voltage Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference

Phase-Excitation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drive Sequence (2-2 Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32

Drive Sequence (l-2 Excitation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32

Excitation Sequence (Clockwise : Paper Feeds Forward)

Ribbon-Feed Gear Train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voll:age

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1

. 2-10

2-28

2-32

2-38

2-46

Z.iii

Page 37

REV.-A

2.1 OVERVIEW

This chapter describes the signals at the connectors linking the primary components of the LX-8 10/850. These components include the printer mechanism and control circuits. The chapter also describes the operation of the printer’s circuitry and

2.1.1 Connector Summary

The interconnection of the primary components is illustrated in Figure 2-1. Table 2-1 summarizes the functions, sizes, and types of the connectors shown in the figure.

Table 2-’1. Board Connector Summary

/printer mechanism.

Board

TAMA

Board

Connector

CN2 CN3 CN4 CN5

CN6 CN7 CN8

CN9

CN 10

Function

Host l/F (Parallel) Optional I/F Control Panel Release Lever CR Motor and PF Motor PE Signal Home Position Signal Head

AC Power Input

DC Power Input (OEM)

Board

Pins

36 1-11 26 A-8

2 2 A-13

Reference Table

A-9 A-1 O A-1 1 A-12

A-1 4 A-15 A-16

2-1

Page 38

REV.-A

FiiEElr

Board

Control Panel

Model 3D 10 Printer Mechanism

Release

CR motor

PF motor

HOME

HEAd

—

1 OPin

2Pin

TAMA Board

12Pin

2Pin

: .5

: 5

ii~

-u

.5 L

36 Pin

Paralel

l/F

m ,-

“:

[

Optional l/F

)

‘1

Optional

Interface

Board

l-l

Parallel l/F j Specific l/F

l----------~ ----------i

HOST COMPUTER

E 5

Power Input I

(OEM)

TA Filter

r–––––––n I

Transformer

I I

Filter

Board

I I

AC”IN

Unit

“’?

L’

I 1

1 ‘

~-..

., .,..,.

NOTE: CR = carriage.

PF = paper feed. HP = home position. PE = paper end.

Figure 2-1. Cable Connections

2-2

Page 39

REV.-A

2.1.2 Outline of Printer Mechanism Operation

Model 3D 10 is a 9-pin serial dot matrix printer. Because the frame and many of the components

The

are of plastic, the mechanism is lightweight. A block diagram of the printer mechanism is shown in

Figure 2-2.

:: :

U m $

~.:

--(>

0+ Ku

~~ u

2’:

$.:

~: $

CW = clockwise; CCW= counterclockwise. HP = home position; PE= paper end.

Figure 2-2. Printer Mechanism Block Diagram

2-3

Page 40

REV.-A

“.. .

2.1.2.1 Sensors

The printer mechanism is equipped with the following sensors:

Paper-End Home-Position (HP) Sensor Friction/Tractor Sensor

(PE)

Sensor

Paper-End Sensor

Figures 2-3 and 2-4 show the paper-end sensor. This sensor switch is ON when no paper is in place

(e.g., when the paper supply has run out).

“Paper-out” Paper present

(PE

ON ~ LOW

OFF + HIGH

sensor)

~Jq~

‘“Paper-out”

Platen

Paper guide

Paper-End Sensor

Paper

“Paper present”

Figure 2-3. Paper-End Sensor Mechanism

+5V

&&.

7A’

Figure 2-4. Paper-End Sensor Circuit

R96

2-4

Page 41

REV.-A

Home-Position Sensor (HP sensor)

Figures 2-5 and 2-6 show the home-position sensor. The sensor switch is ON when the carriage is at

the home position.

Home position + ON

Other positions + OFF - HIGH

This sensor determines the reference

LOIA/

pcxsition

for the carriage drive,

age guide

iage

shaft

Figure 2-5. Home-Position Sensor Mechanism

+5V

CN7-1

<o—————u

R97

Figure 2-6. Home-Position Sensor Circuit

HOME

2-5

Page 42

REV.-A

Friction/Tractor Sensor

The release sensor senses the position of the release lever in order to detect whether tractor feed or friction feed is in effect.

Release Lever Position : Front + F:riction Feed + OFF + HIGH level

Release Lever Position : Rear -+ Tractor Feed ~ ON ~ LOW level

:$-2!

Front

?“’”-

\ i,

Figure 2-7’.

Rear

ease

Lever

Friction/Tractor Sensor

Release Sensor Mechanism

+5V

r’

oJKL-=

R95

Figure

:2-8.

Release Sensor Circuit

2-6

Page 43

REV.-A

2.1.2.2 Motors

This printer has the following motors:

Carriage motor (step motor) Paper-feed motor (step motor)

Carriage Motor

The carriage motor is used to move the carriage right and left along the platen. This unit employs a

4-phase, 48-step motor using either 1-2

Paper-Feed Motor Paper feed is also driven by a 4-phase 48-step motor operating with 2-2 phase excitation. Each phase

switch causes the paper to advance by advanced 1/2 16“ for each phase switch. The gate array controls the motor through an open loop.

or 2-2

Phase excitation.

open-loop system is Used for control.

2.1.2.3 Figure 2-9 shows the dot-wire operation.

When the head-driving coil is energizecl, the dot wire is pushed out. The dot wire strikes the ribbon, causing the ribbon to impact the paper, thereby printing a dot.

Printhead

/Ribbon

Platen

Dot

‘Core

Figure 2-9.

Printhead

2-7

Page 44

REV.-A

2.1.3 Circuit Overview

Figure 2-10 shows a block

--7rmm

ADDRESS

PD78 10HG

(2 c)

EEPROM

(1 c)

XWl

DATA/ADDRESS BUS (LOWER BYTE)

~Q=

,LE

‘Usir+km+=l

diagram of the TAMA board circuitry.

PROM 32KB

BUS

(UPPER

ADDRESS

LATCH

(3C)

BYTEI

GA E05A30 (36)

RAM

8KB/32KB

A[)DRESS

DECODER

‘3”)’

CONTROL PANEL

LED DRIVE

24VDC +5VDC + 12vDC

CG = character generator; GA = gate array.

Figure 2-10.

The circuit consists mainly of the following

● ~PD7810HG CPU (2C)

The

~PD78

Upon receiving the RESET signal, the

● PROM (3C)

The PROM includes the control program (firmware) and character generators.

“

SRM

The

SRM

for expanding data, and as working area for the program.

10HG executes the program in the PROM (3C) and controls all of the printer operations,

2064C

(3D)

SRAM is external melmory for the CPU. It is used as an input data buffer and line buffer

TAMA

Board Circuit Block Diagram

ICS:

CPIJ

begins program execution from address

OOOOH.

. . . . . .

<-.,’.,

2-8

Page 45

●

E05A30

The

gate array (3B)

E05A30

functions are as follows

1. Parallel l/F

2. Address decoder

3. Data address multiplexer

4. PF motor control

5. CR motor control

6. Control panel LED drive

7. Printhead drive control

REV.-A

● EEPROM

(lC)

The EEPROM has a 256-bit memory, and remembers the current paper position.

Other control circuits are as follows:

‘ Paper feed motor drive circuit

The paper feed motor drive circuit

drive:; the paper feed motor. The paper feed motor is a 4 phase-step

motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching

signal by the

● Carriage motor drive circuit

E05A30

gate array.

The carriage motor drive circuit drives the carriage motor. The carriage motor is a 4 phase-step motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching signal

by the

● Power supply circuit

E05A30

gate array.

The circuit converts the AC power source to the DC voltages required by the unit. Specifically, the circuit converts the AC power to +24, +5,

and + 12 V DC.

2-9

Page 46

REV.-A

2.2 PRINCIPLES OF OPERATION

This section describes the operation of each component.

2.2.1 Power Supply Circuit

The electrical power required by this mechanism is developed using the TA

a filter and a power transformer) and the

where line noise is removed, and is then set to the transformer, where it is stepped down into two

separate voltages: AC 26V and AC 12V.

TAMA

board, which converts the power to the DC voltages (see below) required for operation.

Voltage

TAMA board. The AC input passes first through the filter circuit,

“The

transformer output is sent to the power circuits on the

Table

2!-2.

Voltage Applications

Purpose

Filter Unit (which combines

+5 v Logic circuit voltage

Holding voltage for paper feed motor Others

+24 V Carriage motor drive voltage

Paper-feed motor

Printhead drive voltage

+12V

A block diagram of the power supply circuit is shown in Figure 2-11.

Voltage for the optional l/F

drive voltage

I TAMA

TA Filter Unit

Stepdown

Trans--

former

26VAC

12VAC

y-l

Figure 2-11. Power Supply Circuit Block Diagram

Board

Full-wave

~;jtifier

smo~thiflg

Circuit

rectifier

I ~n~oothing I

Circuit

— —

+24 Regulator Circuit

+5 Regulator C i rc uit

+24

VDC

vDC

+12

VDC

2-1o

Page 47

REV.-A

2.2.1.1 TA Filter Unit

The filter board and the transformer are integrated into a single unit. This unit also power switch and the inlet for the

The incoming AC power passes first through the over-current protection fuse (F 1 ) and the power switch, and then into the filter circuit comprised of C 1, C2, C3, and L 1. This circuits removes AC input line, and also serves to present noise generated within the printer from running through the AC line.

incolming AC cable.

incorporates the

the noise

on the

The transformer steps down the incoming AC power into 26

overheating, a temperature fuse is incorporated into the transformer.

Figure 2-12 illustrates the design of

FI -.

INPUT

-L

—

the!

circuit.

Power SW

—

VAC and 12 VAC outputs. To prevent

‘

Figure 2-12. Transformer Circuit

CN1

red

26VAC

blue 12VAC

125V, 1.25A (120V Version)

250V,

0.63A (220V Version)

250V,

0.63A (240V Version)

2-11

Page 48

REV.-A

2.2.1.2 + 12V DC Power Supply Circuit:

As Figure 2-13 shows, a half-wave rectifying circuit is used to convert the incoming 12VAC voltage to + 12VDC.

The 12V output is used only for the option l/F board (via the CN2 connector on the

TAMA

board itself does not utilize this voltage.

,f\c12

AC2

EMO IZW

T T

+ 12V

Figure 2-13. + 12V DC Power Supply Circuit

TAMA

board). The

2-12

g“:,

. . .

. .

Page 49

REV.-A

2.2.1.3

The incoming AC +

36V.

+24V

DC Power Supply Circuit

26V

is full-wave rectified by diode bridge DB 1, generating a DC voltage of about

This voltage is converted by the switching regulator

Figure 2-14 illustrates the circuit design.

MQ1-3.

15A

RBA-

DB1

406B

c 1:%4

26VAC

INPUT

.--1

6800U

50V

R17

6.1 K -

ZD1 ,

HZS ,

20-2

12 cl

—

4?;

O.o?p

film

Vcc

GND

oc RT CT

(uPC494C)

+24V

DC.

;6 !200# 15V

+24vDC

*R2

Figure 2-14.

0.1 2W

+24V

DC Power Supply Circuit

+ GP

Rectifier And Smoothing Circuit

When the AC + of electrolytic capacitor C 1, a voltage of about + over-current protector fuse F2, is supplied to transistors Q4 and Q 1.

When the power comes on, the potential at the collector side of about 20V, Zener breakdown occurs at ZD 1, so that a potential difference is generated between the collector and base of Q4. This causes switching regulator.

26V

is full-wave rectified by diode bridge DB 1, and the result is smoothed by the action

36V

DC is generated. This voltage, after passing

increases. When the voltage reaches

to come ON, so that an operating bias is supplied to the

Note that because the switching regulator does not begin to operate immediately following power on,

Q 1 will also remain off during this time, so that the

MQ 1-3. 15A

FIBA-

406B

C)4

Cl 384

R17

5.1 K

26VAC

INPUT

+36V

input will not be output to the

36VDC

AAM

+24V

line.

+24V

VDC

I 1 1

13A

Frb’+a*b

a c RT CT

I;t 1;- D .T.

C R. O F. 8 lh-

Figure 2-15. Rectifier and Smoothing Circuit

2-13

1~+

Page 50

REV.-A

Switching Regulator Circuit When the voltage is supplied from the rectifying circuit, a 27

C3-R 10 circuit is created. At the same as a comparative voltage, to the negative terminal of error amplifier EA 1. Immediately after power comes on, + 24V is not yet will output a switching signal to the base of internal transistor Qx. External transistors Q3, Q2, and Q 1 will operate, and a 36V DC switching

The output pulse passes through the smoothing circuit, which converts it to a direct voltage. As explained below, this voltage is then returned, via a feedback circuit, to the positive terminal of

EA1

output is thus controlled so that

being generated, so that EA

time, the standard voltage regulator outputs 5V, which is supplied,

output will be LOW, and the switching control circuit

pulse will be output.

+:24V

is always maintained.

KHz switching pulse based on the external

EA1.

. . .

,, .,,

l/A

GND

O.c.l osc I 4

Vref

0.1 2W

Switching

Control

—

4 14 3

5.1

——

—

- 200K

,R6

R14

3.3K

f:,

. .

Figure 2-16.

+I!4VDC

Switching Regulator Circuit

2-14

Page 51

Feedback Circuit

A voltage switching circuit is formed by RI 1, R 12, and

voltage is fed back to

PPC494C.

R16,

and the potential of the

+24V

REV.-A

output

The line between R 12 and R 16 feeds back to the positive terminal of EA 1 in the

PPC494C,

where it

is compared against the standard + 5V voltage. The electric potential of the feedback line becomes

the same as the standard potential at

24.3V,

lowered, and, as a result, the

voltage of

the EA1 output goes HIGH, the

+24V

+24V.

5V X (Rl 1+R12+R16) = 24 a

(RI 1 +

R12)

Vref(+

24.3V,

as shown by the equation below. If the voltage exceeds

(3N

time of the switching pulse drops, the switching duty is

potential drops. This action is repeated in order to maintain a stable

+24V

5V)

line

RI 6

1 9.6K

R12

4.75 K

RI 1 316

Figure 2-17. Voltage Feedback Circuit

2-15

Page 52

REV.-A

Over-Current Protection Circuit

EA2,

Error amplifier abnormality

positive terminal (pin 16), and the current, converted to a voltage value, is monitored. The negative terminal of the output.

in the KPC494, detects over-current caused either by abnormal operation, or by

in the

24V

line at the time of power up. Current-detecting resistor R2 is set at the EA2’s

EA2 is connected to the dividing circuit for the standard voltage (+ 5V) and the

24V

Immediately after power enters the circuit, and until the time that

EA2

the negative terminal of

Vxl

= (RI 1 X

5V)/(R7+R 1

is about 19.2 mV:

1).

24V

output begins, the voltage at

After 24V output begins, the voltage at the terminal is about 0.31 V:

VX2 = (R1 1 X 24

In order for the positive terminal of

V)/(Rl

+Rl 2+R

16).

EA2

to generate the same conditions, the lx current, immediately

after power up, is about 192 mA (11 = 19.2mV/R 1 ). During operation, the lx current is about 3.1A

(12=0.3 I/RI).

Accordingly, this circuit is furnished so that, in the event of the problems listed

switching, in order to prevent the propagation of damage.

When, at the time of power up, abnormality in Q

24V

output line.

When excessive current leak occurs during operation due to abnormality in the motor or the dot head.

or elsewhere causes excessive current leak to the

below, it will halt

24V

;.., .,

—

Vref

R12 R16

4.75KI

9.6K

+24V

line

~g ;“

R7 82K

?75’

Figure 2-18, Over-Current Protection Circuit

P’

,\ .-.,

2-16

Page 53

REV.-A

Switching Pulse Output

The output of the error amplifier in

of the internal oscillating circuit and the feedback voltage from the + 24V output. The feedback voltage changes according to printer operation (i.e., printer load). The output of the error amplifier acts to minimize this change, however, by responding as indicated in Figure 2-19.

Operation Low feedback voltage: Amplifier ON time increases (supply voltage increase)

High feedback voltage: Amplifier ON time decreases (supply voltage decreases)

KPC494C

is determined by the difference between the output pulse

Im_IL’’’’ompara’or

Figure 2-19. output Transistor Drive Waveform

2-17

Page 54

REV.-A

Chopping Circuit

A chopper circuit consisting of diode D 1 and coil L1 is utilized at the output stage. If

coil acts as a resistor, and suppresses vic)lent current surges. When Q 1 goes OFF, the stored energy

in the coil generates a reverse starting

current stabilizer.

current, and current flows via D 1. Thus, the circuit works as a

l~!126SD

0.4Y3VV

1:’33

4 .-

LP40

in ON, the

‘:!

(3A)

UPC494C

IN+ ;N

D. T. CR. O F. B 1 1

,1::-

NCNC

1o11

93.3K

IN-IN+

-Lr

TrQ 1 Emitter i~

TrQ

1 Emitter Current

Oiode

D 1 Current

3:30

R14

R15

330

R13

1.5K

C1815

OFF

~~ OFF

ZBF503

-OITA

19.

R16

3::

2200/1

~fq

OFF

Current at chock

coil

Figure

——————————————-—-———————-

2-20. Chopping Circuit

2-18

Page 55

REV.-A

2.2.1.4 The from the

Immediately following power up,

C7 reaches 5V, however, SR 1 brings VI into a high-impedance condition, and Q6 goes OFF. Thereafter,

based on this 5V charge, rises to a certain level. This intermittent action will generate a stable + 5V voltage.

The chopper circuit provided at the output stage acts, just as with the current.

R31 serves to control the 5V output

drop to due switching delay.

+5V

DC Power Supply Circuit

+5VDC

supplie, via Q6, to the chopper circuit (D2, L2) and the smoothing circuit (C7). When the charge in

is generated by the switching and step-down action that Q6 applies to the 24VDC supplied

24V

power circuit.

B1 151

VI of SR 1 will be LOW, so that Q6

will switch ON when the voltage drops, and switch off when the voltage

at a slightly higher (about 5 mV) level, so as to prevent voltage

+24V

will

be ON. Therefore, +

24V

LP201-2R550

24V

voltage, to stabilize the

will

+5V

R18

22< “

R19

+~’1

C26~

470p

film

R37 2K

Figure 2-2’1.

SR1

78L05A

+5V

C27

-0.1

DC Power Supply

ERB81

19.f[

-004

Z13F503

-III 1

Circwit

R16

4701J

10V

+ 7 —

2-19

Page 56

REV.-A

2.2.2 Reset Circuit

This circuit generates the signal that initializes the printer, and is made by monitoring the + 5 and + voltages when the power is switched ON and OFF.

The reset signal line is connect to the CF’U and gate array 3B. Figure 2-22 shows the reset circuit.

+5V+

R36

3.9K

24v~

MA4036-M

2.2.2.1 Power-on Reset

As Figure 2-23 indicates, a rising

Immediately after

power up, the positive side of C 18 is LOW, which acts to maintain the output condition

of the reset signal.

A1015

R57

10K

Figure 2-22. Reset Circuit

-+ 24V

pulse occurs first, after which a + 5V rising pulse occurs.

MA 165

RESET

24V

The +

24VDC

the base of Q5 becomes

is connected to Q5 to provide the

3.6V.

Q5 will be ON when the following voltage is added to the Q5 emitter:

Zener

bias current. Because the

Zener

voltage is

(Zener voltage) +(Voltage decrease along the easy-flow direction of the P-N junction) =

When Q5 is ON, the voltage of the + 5V line is output to the Q5 collector.

POWER SW

+24V

+ 5V

RESET

Figure 2-23. RESET Output

3.6V,

4.2V

2-20

Page 57

REV.-A

2.2.2.2 Operation at Reset

The reset signal causes the following operations to occur.

1. The printhead carriage moves to the left-side home position.

2. The printer enters the ON-LINE mode.

3. The print buffer and input buffer are cleared.

4. The line spacing is set to 1/6 inch, and the page length is set, depending on the DIP switch setting,

to either 11 or 12 inches.

5. Vertical tabs are cleared.

6. Horizontal tabs are set for every 8

7. The print mode is set according to DIP switch setting and the contents of

EEPROM ( 1 C) stores the previously set c)perating modes and conditions, such as font and position of

fanfold paper.

cc)lumns (columns 8,1 6,24...)

EEPROM.

2.2.2.3

Power-off Reset When the + 5V potential drops, Q5 goes off, the energy stored in the electrolytic condesner is released via D 15 and R82, and the reset condition is entered.

2-21

Page 58

REV.-A

2.2.3 Carriage Operation

This section describes the carriage operation.

2.2.3.1 Carriage Mechanism The carriage mechanism includes the the platen. Figure 2-24 shows the carriage mechanism.

The timing belt is connected to the and moved via the belt-driven pulley. The moved right and left along the carriage

Timing B

printhead, the carriage, the timing belt, the carriage motor, and

bottclm of the carriage. The belt is driven by the carriage motor

printhead is mounted on the carriage, and the entire unit is

guide shaft and plate.

Left

,:;>

,., .

,..,, .

,,:,,

Carriage Gu

Figure

2.2.3.2 Carriage Motor Specifications

Carriage motor specifications are as

Type

Drive Voltage

Coil Resistance Current

4-phase, 48-pole 24 V * 10%

11 ohms &7% at 25 degrees C Driving: 0.36 A

Holding: 0.09 A

follclws:

0.28 A

Carriage Mechanism

2!-24.

step motor

& IO%(Typical)

10%

: Driving Pulley

(Super Draft or Draft Printing)

(NLQ Printing)

{;,:

2-22

Page 59

REV.-A

2.2.3.3 Carriage Drive Circuit Block Diagram Figure 2-25

for the carriage motor is directly executed not by the CPU, but by the gate array (3 B), which acts on

the

shows a block diagram of the carriage motor drive circuit. In this circuit, the phase switching

CPU phase da

SLA702(

drives the carriage motor with a stabilized current.

CPU

PD78 10HG

(2C)

E05A30

(3B)

Data

Figure 2-25. Carriage Drive Circuit Block Diagram

Phase

Data~

SLA

7020M

(

1A)

‘o

Page 60

REV.-A

2.2.3.4 Carriage Motor Drive Circuit

This unit utilizes an SLA7020M IC for the step motor drive. This IC causes the motor to be driven at the specified current. The IC utilizes a MOSFET power element, so that heat generation is low, and there is no need to use a radiator board. The current value is determined by the value of the external voltage

input.

Within the IC, the AB

identical circuits.

For convenience, only the AB

drive circuit. Figure 2-27 shows the SLA7020M circuit diagram.

E05A30

(3 B)

C~A CRB

CRC

CRD

(Ax) phase and the CD

(Ax) circuit is explained below. Figure 2-26 shows the carriage motor

+5V

R59

4 5 6 7

cl 5 470p

47K

(BE)

phase are completely differentiated, and create

R61 47K

820v

Clo

INA OUTA

INB OUT~

TDA OUTB

TDB OUTS

( 1A)

REFA

RSA

REFB GNDA

RSB GNDB

SLA7020M

+ C25

10X

– 50V

CR A CR 8 CR C CR D

470p 500V x4

CPU

!LPD78 10H G

( 2 C) PA3

PA4 PA5

D4 EK03W

R29

1.0

2% 2W

I I I

R30

1.0

EKOffi

+5V

R52

6.8K

R53

6.8K

Vvv

R51 6.8K

*VV

Figure 2-26. Carriage Motor Drive Circuit

2-24

Page 61

Phase

+24V

●

F24V

(

———

———.——

)

—

——.—.—

R30

1.0

NOTE: Phase CD is equivalent to the above.

——

+5V

R59

47K

C15 470p

+5V

CRA

Figure 2-27. SLA7020M Circuit

Diagram

Page 62

REV.-A

SLA7020M

Although most step-motor

Phase Signal Input Circuit

control IC’S input 4-phase data directly, the

SLA7020M

requires a special

type of phase data.

In the case of

2-2 phase excitation:

Figure 2-28 shows the excitation signal input circuit.

The A-phase-side excitation signal input is via a single line. The output is divided among non-inverted A-phase output and A-phase output passed through an

inverter. Therefore, the A-phase output side will

be ON when the excitation input signal is HIGH. The A-phase output side will be ON when the excitation input signal is LOW.

Figure 2-29 shows the timing chart for 2-2 phase excitation.

PhoseA

output

Figure 2-28. Phase Data Input Circuit (2-2 Phase)

TdA

Input

Phase A

Phase~

I I r

1 1

2’3 4 1

I I

1 1

2 3 4’

1 1 1

I I i

Figure 2-29. Phase Signal Timing Chart (2-2 Phase)

2-26

Page 63

REV.-A

In the case of 1-2 phase excitation: Figure 2-30 shows the excitation signal input circuit. When the Td terminal is LOW, the SLA702M can

cut off the output current. By using this function, the unaltered 2-phase excitation signal can cause the

1-2 phase excitation to be on

Figure 2-31 shows the timing chart.

3/8ths

of the time, which is a suitable value.

““’’’-r’”’

Figure 2-30. Phase Data Input Circuit (l-2 Phase)

INA

input

TdA

PhaseA

Figure 2-31. Phasa Signal Timing Chart (l-2 Phase)

Ill

Ill Ill

Ill

;;

—1111

i ~ ~ ~

1!11

11213141516171

1,,,11111

, .

;; ;;

; I

—

2-27

Page 64

REV.-A

Reference Voltage Generation Circuit Figure 2-32 shows the reference voltage generation circuit and Table 2-3 shows the reference voltage.

The reference voltage generation circuit is shown in Figure 2-32, the reference voltages are shown in Table 2-3. The SLA7020M drives the stepping motor based on current proportional to the reference voltages set here. There are four stages of reference voltage values (motor drive current values), and these are switched to correspond to the drive speed of the motor.

+5V

CPU

LLPD78

10HG

(2 c )

~A3

PA4

PA5

q,y

R53

R51

Vvv

6.8K

Figure 2-32. Reference Voltage Generation Circuit

Table 2-3. Reference Voltage

PA5 I PA4 I PA3

H\Ll

Reference Voltage

0.634 V

0.359

0.280 V

0.089 V

* 5.49K

~ E

R46

“ 100

R47

Vref

2-28

,,.

Page 65

REV.-A

Constant Current Drive Circuit

The constant current drive circuit is shown in Figure 2-33 (for A-phase only), and the waveforms for each part are shown in Figure 2-34. In Figure 2-33, the reference voltage is indicated by determines the peak current through resistance

R30.

Resistance R59 and capacitance C 15 determine

Vref;

this voltage

the OFF time of the chopper.

vcc=

+24V

I OFF

Gp Gp

)

@ RSA

i ION

RS= R30

lsll

+-l +

I .

COMP1

C15

470p

Vref

“1

Figure 2-33. Constant Current Control Circuit

2-29

Page 66

REV.-A

VRS

;

IWF

Icc

[

.-.-J---------.---

WWF :

----

. --- L -----------

: 1

;-----------------

1 ,

I I t

, ----------------,

Zvcc

---

----------------

---------

-.-.--

------- ------- ?------ ------- -

------ : ----- . : - . ---- s -----------------------

-------

------

.. -----

‘4

.------

------

.------

—

------

,------ -------- -

Figure 2-34. Waveforms

The circuit’s constant current control process is shown above.

Peak current detection (to-t 1)

(1) When excitation input IN goes ON, so does MOS FET Q 1. The A-coil excitation current I

flows along route –. As I

(2) (3) (4) When (5)

Chopper off time (t

(6)

ON increases, so does the voltage at

When

COMP2

When

route to switch from I

R30

VTD drops below the

inversion causes Q1 gate voltage to go LOW, and Q1 goes OFF.

Q1 goes OFF, reverse potential is generated in the motor coil, causing the coil current

voltage exceeds Vref, COMP 1 inverts, and the TD voltage falls to near zero.

COMP2

l-t2)

ON to IOFF.

threshold voltage,

R30.

COMP2

inverts.

. .,

ON then

2-30

Page 67

(7)

(8)

(9)

REV.-A

IOFF

flow then causes current flow in

(V-) thereby drops below

VREF,

and COMP1 again inverts.

R30

to change direction. COMP1 feedback voltage

VRS

COMP 1 output stages are formed by an open collector circuit. As a result of the inversion in

step (7),

COMP 1 output goes HIGH, so that TD voltage

VTD

gradually rises, in line with the time

constant determined by resistance R59 and capacitance C 15.

The MOS FET gate voltage is maintained at OFF until the value of the T

COMP2

reference voltage of 2V.

D voltage reaches the

The period above, during which

Chopper on time

When TD voltage

(t2-t3)

VTD

VTD is rising from OV to

reaches the

COMP2

on.

(1 1)

When Q1 goes on, the current flow switches from

(12)

On the basis of the time content of motor coil A, response to power source voltage Vcc.

As I

(13)

ON increases,

remains on, supplying current ION from the power source to the motor.

The period in which

R30

potential

VRS

advances toward VTD is equivalent to TON.

VRS

also increases. Until the value of

2V,

is equivalent to TOFF.

reference value (2 V),

IOFF

to ION.

loN,

after a certain delay, gradually rises in

COMP2

inverts, and Q 1 goes

VRS

reaches that of

VREF,

2-31

Page 68

REV.-A

2.2.3.5 Carriage Motor Software Control

This section describes the carriage motor software control.

Excitation System

The excitation system is determined by the firmware and is executed in accordance with the carriage

speed, as shown

2-5 and 2-6.

in Table 2-4. The motor drive sequence for each excitation system is shown in Tables

Table 2-4. Phase-Excitation Method

Carriage Speed Phase-Excitation Method

1200

900 900

PPS

2-2 Phase

1-2 Phase

Table 2-5. Drive Sequence (2-2 Excitation)

.,: .,, .,

$,’,

‘-,,..-

ICR

DIRECTION

Step No.

CR DIRECTION

Step No.

2 ON

3 ON

Phase A Phase B Phase C Phase D Phase A Phase B Phase C Phase D

OFF

Left -+ Right

OFF

OFF OFF

OFF

OFF ON

ON ON

OFF

OFF ON ON

OFF

Right ~ Left

OFF OFF

OFF

Table 2-6. Drive Sequence (l-2 Excitation)

Left

-+ Right

Phase A Phase B Phase C Phase D Phase A Phase B Phase

OFF

OFF OFF

OFF

OFF ON

ON ON

OFF ON

OFF

Right

OFF

OFF OFF

OFF

Left

OFF

C Phase D

OFF

.+?,

6 OFF

OFF

OFF ON

OFF

ON ON ON

OFF

OFF OFF

2-32

OFF

Page 69

REV.-A

Because the carriage is driven by a step motor, the printing direction can be changed at any time, and the carriage can be stopped at any position. Carriage motor control is effected by an open-loop system which switches the phases in accordance with the set speeds.

-f-e’’Jw-JL&aau

(phase switching

Holding

Home-Position Seek

The control that causes the carriage to move to the home position when the power is turned on is called home-position seek. Figure 2-36 shows the home-position seek operation.

Itc

1 “

tcz “ 1 I

-l

Acceleration area “

(Accelerating)

Figure 2-35. Carriage Motor Control

1 1 1

“tc28

or tc14

; ;

(constan speed)

;~;

t(constant)

Prlntln

area

“

1 1

area

+D28

t014 #

‘“1

Deceleration “

(Deceierat ing)

;

When power is applied, the printer executes 2-2 phase excitation for 20 or 30 ms (regardless of the phase switching timing) and checks the HOME signal. The result of this check determines whether the starting position should be 1 or 2. The carriage enters the home position only once during the initialization.

I Home

CR Movable Area

Printing Area

4step

1’

2steps=

.—

–

--t

End of Home Position seek

———.

—— — —— — — ——— ——— ———— —

Constant

-1

Deceieation

Acceleration

i’

Acceleration

Figure 2-36. Home-Position Seek

2-33

Page 70

REV.-A

Printing Area

The printing area

is defined as starting 26 phase switching times following the home position.

--JvLODJm-J_

..-

Acceleration Area

Figure 2-37. Printing Area and Printing Timing

Abnormal Carriage Operation

This unit does not employ a print timing signal (PTS) sensor and cannot detect abnormal carriage operation. There will therefore be no error recognition if, for example, the carriage movement is blocked or otherwise affected by an external force. An error will only occur if the HOME signal while the printhead

is in the printing area, in which case the carriage will stop.

Printing Area

,f+

2-34

Page 71

REV.-A

2,2.4 Paper Feed

This section describes the paper-feed operation.

2.2.4.1 Paper Feed Mechanism Operation Friction feeding is used for cut sheets, and push tractor feeding is used for fanfold paper.

Friction-Feed Operation The paper is held against the platen by paper-feed rollers. The paper-feed motor rotates the platen gear, via the paper-feed reduction gear, in the direction shown in Figure 2-38. Because of the friction between the paper-feed rollers and the platen, the rotation of the platen gear causes the paper to be fed. The

feeding direction is indicated by the arrow in the Figure.

The paper is held against the platen by the spring force of the paper-feed rollers, and can be released

by shifting the

paper-release lever forward.

,aper~nsionRo>-+e::sheet)

@~{’aperTe~~~~~~~con.ear

Paper Feed Motor

Pinion Gear

‘0

Figure 2-38. Friction-Feed Operation

. ... .

Paoer

Feed Motor

2-35

Page 72

REV.-A

Push Tractor Feed Operation

When the push tractor unit is used, the paper is

the tractor belt. The paper feed motor is driven and, via the pinion on the motor shaft, rotates the gears in the direction shown in Figure 2-39, rotating the tractor belts. This causes the paper advances in the direction indicated by the arrow. When push tractor feeding is used, the pressure of the paper feed rollers against the platen is released by moving the paper release lever to its forward setting.

/--

,/’

Paper Tension Roller

/“”

“

set such that its holes mesh with the tractor pins along

Paper (Continuous)

. .

‘..

““L,

Push Tractor

K<::;*

‘3:,

‘

w y.;.~p

Paper Tension Roller Gear

Paper Tension

Roller Transmission Gear

Fiaure 2-39. Push Tractor Feed Operation

2.2.4.2 Paper-Feed Motor Specifications Paper-feed motor specifications

Type

Drive Voltage Coil Resistance Phase Excitation Current

Driving Frequency

are as follows:

4-phase, 48-pole step motor 24

VDC & 10%

40 ohms 2-2 phase Maximum, 1.1 A (Rush Current, 26.4 Driving: 0.30 A Holding: 0.06 A A 20 mA 480 PPS

~7Y0

fJJJf+’

;

at 25 degrees C

(Typ., 480pps,

ff’

.,.- #

>’*.

“

. . .. ~

24VDC)

~>TractOrReductiOn

Gear’

aPer

‘

VDC)

Feed Reduction

, Paper Feed Motor Pinion Gear

Paper Feed Motor

Gear

2-36

Page 73

REV.-A

2.2.4.3 The paper-feed motor drive circuit is shown in Figure 2-40. The paper-feed motor is a step motor which can utilize 2-2 phase excitation. When the paper-feed signal on, and +24 V is supplied to the motor. When the via resistor

CPU

flPD78

(2C)

‘n

E0530

(3 B)

Paper-Feed Motor Drive Circuit

R42

and diode D6, to hold the motor.

10HG

R45

3.3K

V4V

3.3K

V“VAV

VAVAV

5.6K V4V

PC2

PFA

PFB

PFC

PFD

RI 16 33K

777

R87

R89

R86

R88 3.3K

PC2 is set to HIGH, Q20 and Q 16 are turned

is not driven, + 5 V is supplied,

+5V

EMD! W 39

R42

l/2W

PFCOM PFCOM

R44

5.6K

paper-feed motor

+24V

R36

PF A

PF B

PF C

PF D

Figure 2-40. Paper-Feed Motor Drive Circuit

2-37

Page 74

REV.-A

2.2.4.4 Paper-Feed Motor Software Control The paper feed motor is a 48-pole step motor and is open-loop controlled. When 2-2 phase excitation is used to drive the motor, each step feeds the paper a distance of

Table 2-7 shows the paper-feed motor excitation system.

1/2 16th inch.

Table 2-7. Excitation Sequence (Clockwise: Paper Feeds Forward)

Step No.

Phase A

ON OFF ON

OFF

Phase B Phase C

OFF

NOTE: If the paper-feed motor is driven counterclockwise, the

Figure 2-41 shows the paper-feed motor drive timing chart.

ICI !

IC2

IC3

1!1

IC4

! t !

Figure 2-41. Paper-Feed Motor Drive Timing Chart

Phase D

OFF

OFF ON

OFF

paper is fed in reverse.

OFF

NOTE: If there are less than 10 steps, the speed will not change.

2-38

Page 75

REV.-A

2.2.5 Printhead

This section describes the

2.2.5.1 Printhead Printing Operation

The dot-wire operation during printing is as follows. When the head-driving coil for a dot wire is

energized, the actuating plate, which is engaged to one end of the dot wire, is attracted to the iron core, and drives the dot wire toward the platen. The dot wire forcefully pushes both ribbon and paper against the platen, causing a dot to be printed.

When the head-driving coil is deenergized, the actuating plate spring causes the actuating plate to return to its initial position. After striking the platen, the dot wire also returns to its initial position, partly in

response to the impact energy, and partly as a result of the wire-resetting spring. The dot wire then remains engaged to the actuating plate until it is driven again. Figure 2-42 illustrates the printing operation.

printhead

operation.

printhead

Platen

Wtre Resetting Spring

Stopper

Actuating Plate

UIXl

[~HeacJDrwmgCo,l

Act;ating

Plate

Dot Wire

4’

L)j

B,r’’nc”re

Spring

Figure 2-42.

Printhead

Ribbon Mask

(]

Ribbon

Paper

Printing Operation

2.2.5.2 Printhead Specifications

Printhead specifications are as follows:

Solenoids Wire Diameter

Drive Voltage

Coil Resistance

9 solenoids

0.29 mm 24 VDC

19.2

1.0 ohms at 25 degrees C

10%

2-39

Page 76

REV.-A

2.2.5.3 Printhead Drive Circuit Block Diagram

Gate array

The

CPU determines the pulse width for the head-wire drive pulses from gate array

monitoring the

E05A30

printhead

is used as an 8-bit + l-bit data latch.

drive power (+24 V line).

E05A30

CPU

PD78 10HG

(2C)

E05A30

(3B)

Pri

nthead

D rive

C i rc u it

Pri

ntherd

--N

DATA

--l/

FIRE

●

Figure 2-43. Printhead Drive Circuit Block Diagram

2.2.5.4 Gate Array

The

E05A30

The data is output to the

Print data is expanded in the image buffer as dot patterns. The CPU outputs the dot patterns to the

E05A30.

The data for pins 1 through 8 of the printhead is latched by HD 1 trough HD8 of the

OCO06H write operation)

The data for pin 9 of the

After data latching, the When the signal is LOW, the gate array will be open, so that the data from

be output.

gate array includes circuitry to interface the CPU and the printhead.

E05A30

Operation in Printhead Drive Circuit

printhead in the following sequence:

printhead is latched by HD9 of the

printhead drive pulse width signal

E05A30. (MMIO

is output from the CPU’s event counter.

E05A30. (MMIO

OCO05H write operation)

HD1 through HD9 will

. . . . . .

‘i_

2-40

Page 77

REV.-A

2.2.5.5

The drive pulse width is adjusted using CPU port PC6.

E05A30 (3

Printhead

HD6 58

HD7 HD8

HD9

Drive Circuit

HD1

HD2

HD3

R22,kh

HD4 60 R23A,, 1 K HD5 59

‘

R20,,,

R21,,,

1 K

R24,,, IK

R25,,, 1

R26&,, R27,,,

R28,,,

1 K

D1647 Q7

D1647

D1647 Q8

D1647 Q1O

D1647

Q12

D1647 QI

D1647

+24V

Q13

2 4

0 HD4

0 HD6 0 0 0

HDCOM

HD1 HD2 HD3

HD5

HD7 HD8 HD9

CN8 HEAD

+’

Figure 2-44. Printhead Drive Circuit

[

20V

0.5

Figure 2-45. Printhead Driving Waveforms

2-41

Page 78

REV.-A

2.2.5.6 During operation at 900 PPS, one print cycle is performed at each phase switching step, so as to meet

the specifications of the

The drive pulse width is adjusted by using an A/D converter (Figure 2-47) to detect the drive voltage, and is kept within the area outlined by the oblique lines in Figure 2-47.

Printhead

Specif icat ion of Pr inthead

Head Prive

Software Control

printhead (solenoid drive frequency: 900 Hz).

Pulse

#r?,

-..

$:q:&J1-n—rL

900PP

I I

I ~

+24V

Figure 2-46. Print Timing

ZD3

MZS4

MB2-1

)

+’

C20

0. l/A

I 1

+24V

;(

R84

R108

1.65~

+5V

‘

—

MA105

C21

470

”

AVREF

AN5

CUP

/L PD7

(2C)

810HG

Figure 2-47. A/D Converter (+24 VDC Line Monitor) Circuit

2-42

Page 79

45C

(425)

Drive Pulse Width

(ils)

Figure 2-48.

(21 .6)

I 1 1 1 1

I t

1 1 1 1 1

22.0

23.0 Drive Voltage

I t

1 1 1

24.0

25.0 26.0

(VDC)

1 1

(26.4)

;)

400

350

300

Relationship between Head Driver Voltage and Print Driving Pulse Width

Page 80

REV.-A

2.2.6 Host Interface

The host interface circuit is

the low-pass filter, consisting of R72 and C 12, and flow into the STROBE terminal.

These pulses latch the parallel data and set the BUSY signal HIGH, so that subsequent data transfer

is inhibited.

At this time, the CPU, by reading address are latched in read the data.

the gate array. When the CPU determines that data have been latched, it proceeds After the data have been read, the gate array automatically resets its busy signal.

shown in Figure 2-49. STROBE pulses from the host computer pass through

OCO02H, can detect whether the data from the computer

(A)a

xl .4 w

-1

-!:.,:;

Figure 2-49, Host Interface

2-44

Page 81

2.2.7 EEPROM Circuit

The

EEPROM

current panel settings. This memory

stores in its memory the current feed position of continuously fed paper, as well as the

retained even after power is shut off.

REV.-A

EEPROM

can memorize the current position of continuously fed paper, so that this information can be

maintained even if power goes off.

Figure 2-50 shows the

EEPROM is selected when CPU port PC5 goes HIGH. Once EEPROM has been selected, the data to be

sent is set in CPU PC4’S clock. Data are read, bit-by-bit, in line with falling clock pulses.

The

EEPROM receives commands to indicate whether to read or write data, and to indicate addresses.

EEPROM circuit. Note that this is external to the CPU’s memory space.

port PB 1, and is fed bit-by-bit to the

EEPROM

in line with rising pulses from CPU port

CPU

PD78 10HG

(2C)

PB 1

PBO

PC5

PC4

777

ER59256 ( 1 c)

TEST

CLK

‘

RI 19

R120

33K 33K

Figure 2-50.

EEPROM

Circuit

2-45

Page 82

REV.-A

2.2.8 Ribbon-feed Mechanism

The ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. The ribbon-driving gear is always driven counterclockwise (regardless of the timing belt direction) via the gear trains shown in Table 2-8.

Table 2-8. Ribbon-Feed Gear Train

Direction of Movement of

Carriage Left to right (arrow o)

Right to left (arrow

Belt-driven pulley

Platen gear (2)

Ribbon-driving gear

Belt-driven pulley -+ Platen gear (1)

+ Platen gear (3)

Ribbon-driving

Gear Train

-+ Platen gear (1)

--+

Platen gear (4)

gear

Figure 2-51 shows the ribbon-feed mechanism. The inked ribbon is held in the cartridge case between the ribbon-feed and the ribbon-pressure roller mounted on the ribbon-driving gear. The ribbon configuration is such that the ribbon can feed endlessly.

The ribbon-driving gear drives the rollers, which causes the ribbon to be fed.

To prevent ribbon slack, a ribbon-breaking spring is attached at the exit of the cartridge case. A ribbon

mask is installed to prevent the ribbon from staining the paper.

Ribbon Feed Roller

Ribbon Pressure Roller=

t>;

Ribbon Transmission Gear

Planet Gear

Planei Gear

Ribbon Driving Gear _

$9 \\\\b

Figure 2-51. Ribbon-Feed Mechanism

2-46

-#’@&$&T

Ribbon Br

“caking

Spring

Page 83

CHAPTER 3

OPTIONAL EQUIPMENT

REV.-A

3.1 INTERFACE OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.1 Model 8143 Serial Interface

3.2 CUT SHEET FEEDER

3.2.1 Cut Sheet Feeder C80612* Specifications .................. 3-5

3.2.1.1 General Specifications

3.2.1.2 Paper Specifications

3.2.1.3 Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.1.4 Dimensions and Weight

3.2.2 Cut Sheet Feeder Operating Principles . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

3.2.2.1 Mechanism Operation

3.2.3 Cut Sheet Feeder Disassembly and Reassembly ....... 3-10

3.2.4 Cut Sheet Feeder Preventive Maintenance ................. 3-1 4

3.2.4.1 Cleaning

3.2.4.2 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 PULL TRACTOR

3.3.1

3.3.2

C80006*

Pull Tractor Operation

Pull Tractor Disassembly and Reassembly ................... 3-1 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C80612*

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . .

. ., . . .

.,,

. . . . . . . . . . . . . . . . . . . .

. . .

..0....,,

3-1 3-1 3-4

3-5 3-5

3-7

3-9

3-14

3-16

3-6

3-14

3-16

Figure 3-1. Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 3-6. Figure 3-7. Figure 3-8. Figure 3-9.

Figure 3-10, Figure 3-11. Figure 3-12. Figure 3-13.

LIST OF FIGURES

LX-81 0/850 with Cut Sheet Feeder Printing Area

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cut Sheet Feeder Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Side Cover Removal

Paper Loading Roller Shaft Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

E-Ring Removal

Shaft Holder Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hopper Unit Removal

Lubrication Point (1) Lubrication Point (2) Push-Pull Feed Operation Removal of Sprocket’s Intermediate Gear

and Relation Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-4 3-6

3-7

3-11

3-12

3-12 3-13 3-14 3-15 3-16

3-17

3-i

Page 84

REV.-A

Figure 3-14. Figure 3-15. Figure 3-16. Figure 3-17.

Table 3-1.

Table 3-2.

Table 3-3. Table 3-4. Table 3-5. Table 3-6. Table 3-7.

Removal of Sprocket Mounting Plate L . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Removal of Sprocket Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Direction of Paper Guide Roller Removal . . . . . . . . . . . . . . . . . . . . . . 3-18

Direction for Insertion of Sprocket Wheels ................. 3-19

LIST OF TABLES

Optional Interfaces Jumper Settings

DIP Switch Settings

Bit Rate Settings DIP Switch Selection

Tools for Assembly or Disassembly

Lubricants

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2

3-2 3-3 3-9

3-10

3-1

3-14

$“

“$.

. . . . . . .

Page 85

REV.-A

3.1 INTERFACE OPTIONS

The LX-8 10/850 is able to utilize the Model 8100 series optional interfaces. The main interfaces are

listed in Table 3-1.

Table 3-1. Optional Interfaces

RS-232C

Current Loop

IEEE-488

(GP4B)

Cat. No.

8143 8148

8165

--4

Buffer Size

None

2K/8K

Buffer Size

2K/8K

Flag Control

Function

AH, L, DC

Description

NOTE: For details, refer to the “Optional Interface Technical Manual.”

3.1.1 Model 8143 Serial Interface Operation

With the

8143 interface.

Specifications Synchronization Bit rate

Word length

Start bit Data bits

Parity bit

Stop bit

Signal level

RS-232C

Current loop

Handshaking

RS-232C

and a

20mA

neutral current loop, the printer is able to support the optional Model

Asynchronous

to 19200 bps ●

bit

7 or 8 bits

Odd, Even, or None

1 bit or more

Mark = logical “1” (–3 to –27 V) Space = logical “O” (+3 to +27 V) Mark = logical “l” (current ON) Space = logical “O” (current off) By REV signal or X-ON/OFF code (Signal polarity can be inverted by jumper setting.)

●

‘

N\OFF

X-O

Control

Listen Only

Operation

Max. Bit Rates

(bps)

19200

Address

Operation

“

Selectable by DIP switch.

NOTE: If the parallel interface cable is connected, disconnect it before using the 8143 board, as parallel

interface input is used to read jumper settings and DIP switch status.

3-1

Page 86

REV.-A

Jumper Settings

Table 3-2. Jumper Settings

Function

?,,

J2 J3

J4 J5

JRC

JNOR

JREV

JF ON

ON: “TTY TXD” is brought to

ON: “TTY

ON: “TTY RXD” is brought to + 12V through 470

ON: ON:

Select input signal level

Select input Data entry

Select TTY TXD function

TXD RET” is connected to signal ground.

‘“TTY RXD RET” is connected to signal ground. “DTR and DCD” are brought to 12V through 4.7 Kohm register.

DIP Switch Settings

DIP SW No.

(JB3) Bit rate selection

1-1

-t-

12V through 470

OFF

OFF OFF

OFF

RS-232C

MARK

SPACE (Current loop)

Output REV flag

(RS-232C)

ohm register.

level

Table 3-3. DIP Switch Settings

Function

OFF

ON OFF

Current loop level

output

signal

See Table 3-4

X-ON/X -OFF

1-2 (J8/7) Data length selection 1-3

(JB

1-4

(JB2)

1-5 (JO/E) 1-6

(JPDS)

1-7 (P/s)

Bit rate selection Bit rate selection Parity selection Parity selection 8143 selection

7 bits

EVEN

Enabled

8 bits See Table 3-4 See Table 3-4

ODD

See Table 3-4

Disabled

3-2

Page 87

Table 3-4. Bit Rate Settings

REV.-A

)

Bit Rata

(bps)

1800 2400 4800

9600 19200 19200 19200 19200

SW1-7

(JB4)

OFF OFF

OFF ON OFF OFF OFF OFF OFF OFF

Swl-1

(JB3) (JB2)

ON ON

ON OFF OFF OFF OFF

SW1-4

SW1-3

(JB1

OFF

ON OFF OFF OFF

OFF

OFF OFF OFF

)

Bit Rata SW1-7

(bps)

110

134.5

150

200

300

600

1200

(JB4)

ON ON ON

ON ON ON ON

ON ON

Swl-1

SW1-4

SW1-3

(JB3) (JB2)

ON ON ON ON ON

OFF OFF OFF ON OFF OFF OFF OFF

OFF

(JB1

OFF

NOTE: For current loop operation, a data transfer rate greater than 1200bps cannot be guaranteed.

Handshaking Timing When the amount of buffer space for input data becomes 256 bytes, the printer indicates that it is “not ready

jumper setting). When the available buffer space becomes 528 bytes, the printer indicates that it is “ready to receive data” by outputting the X-ON code and/or changing the REV signal.

to receive data” by outputting the X-OFF code and/or REV signal (polarity can be selected by

Error Handling An asterisk (*) is printed when a parity error is detected. Other errors (e.g., “overrun error” and “framing error”) are ignored.

3-3

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3.2 CUT SHEET FEEDER C80612*

The LX-8 10/850 printer can use C806 12* cut sheet feeder. This cut sheet feeder has the following features:

1. Cut sheets may be handled in the same way as fanfold paper.

2. Sheets may be manually inserted.

3. The feeder is easily mounted and dismounted from the printer.

4. The feeder requires no electrical connection to the printer.

5. The feeder is extremely reliable.

6. A high level of performance can be achieved.

Figure 3-1. LX-81 0/850 with Cut Sheet Feeder

3-4

Page 89

3.2.1 Cut Sheet Feeder C80612* Specifications

REV.-A

This section details the operating specifications for Cut Sheet Feeder C806

3.2.1.1 Hopper

General Specifications

Capacity:

For paper weight of: 64 90 g/m2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

g/m2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 sheets maximum

12*.

185 sheets maximum

NOTE: If the weight of the paper differs from the above, total thickness must be less than 0.59 inches

(15mm).

Stacker Capacity:

Reliability:

64 g/m2 paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 sheets maximum

g/m2 paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

55 sheets maximum

MCBF (Mean Cycles Between Failures): 100,000 cycles

Environmental requirements:

Operating temperature range - +5 to 35 deg. C Storage temperature range - –30 to 65 deg. C Operating humidity range - 15% to 80% (with no condensation) Storage humidity range - 5% to 85% (with no condensation)

3.2.1.2 Paper Specifications Cut sheet paper must be in new condition. It must not be curled or curved, and must be free of surface and edge damage.

Paper type and quality: Plain bond, typewriter or PPC quality paper with a minimum wood pulp content

NOTE: Paper with higher wood content, and very light and very heavy paper, must be operationally

tested prior to regular use. Paper with a

also be so tested.

Paper width and length:

Paper thickness:

Paper weight:

Angular deviation:

textllred

Width - 182 mm (7.17 inches) to 216 mm (8.50 inches) Length – 257 mm (10.1 inches) to 364 mm (1 4.3 inches)

0.07 mm (0.0028 inches) to 0.1 mm

g\m2 to 90 glmz (17 lb to 24 lb)

64 Below

&O.5 mm (0.02 inches)

embossed, glossy, or hammered

(0.0039 inches)

surface must

Recommended conditions for paper storage:

Temperature:

Humidity:

+ 18 to 22 deg. C

40% to 60%

3-5

Page 90

REV.-A

3.2.1.3 Printing See Figure 3-2.

Area

,,p,

‘$-....

3mrn(0.i

8.5mm(0..33”) min.

Printable

min.

area

2’”)

{

ABC

Printable area

XYZ

) /

3mm(0.i 2“)

min.

NOTES:

13.5mm(0.53”)

approx.

The printable length is approximately

Paper feed accuracy can not be assured within

edge.

Figure 3-2. Printing Area

22mm

(0.87 inches) less than the actual page length.

22mm

(0.87 inches) from either top or bottom

3-6

Page 91

3.2.1.4 Dimensions and Weight Dimensions:

444 mm (1 7.5 inches) (Width) X 434 mm (1 7.1 inches) (Depth) X 416 mm

(1 6.4 inches) (Height) (including paper feed knob)

REV.-A

NOTE: Dimensions

were measured with the cut sheet feeder mounted on the printer.

Weight Approx.

Figure 3-3. Dimensions

kg (excluding covers)

1.1

3-7

Page 92

REV.-A

3.2.2 Cut Sheet Feeder Operating Principles

The cut sheet feeder is driven by firmware incorporated in the printer. The feeder need not be electronically connected to the printer.

‘+

Cut sheet feeder mode can be selected either by DIP

Selection by DIP switch

The cut sheet mode is selected by the DIP switch setting.

switch or by command.

Table 3-5. DIP Switch Selection

DIP Switch

2-2

Selection by comman’d After the cut sheet feeder has been mounted on the printer, the following command can be used. “-’ Command:

Format:

Cut Sheet Feeder Mode

ESC EM

CHR$(27);

where “n” signifies the following

n=o

n=4 n=R

Function

CHR$(25); “n”

Cancels the CSF mode Specifies the CSF mode Ejects a sheet

Valid

OFF

Invalid

$. k

NOTE: This command should be input when paper is loaded.

.$-:

,,, .

3-8

Page 93

REV.-A

3.2.2.1 Mechanism Operation Paper is loaded between the paper holder and the paper loading rollers. When the paper feed motor

rotates in reverse, the gears, via the pinion on the motor’s shaft, rotate in the direction of the white arrows (see Figure 3-4), and friction causes the paper to advance to the paper guide. When the paper comes into contact with the platen, the rotation of the paper feed motor changes to the forward direction, and the gears rotate in the direction indicated by the black arrows. Friction causes the paper to advance between the platen and the paper feed rollers. As it advances, the paper is further guided by the paper ejecting rollers. Figure 3-4 illustrates the feed operation.

Paper

(Cut Sheet)

Paper Feed’

Roller

k\\\\\

~Driving

0’

Platen

Gear

‘ /

/’

(ii?

E#j’::::d/w

Paper Feed Motor Pinion Gear

Pa~er

Lever A

mission A

Transmission

Gear B

Tractor Reduction Gear

Illf

Feed Motor

Figure 3-4. Cut Sheet Feeder Operation

3-9

Page 94

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3.2.3 Cut Sheet Feeder Disassembly and Reassembly

.*.

This section describes the procedure for removing the hopper unit of the C806 12’ cut sheet feeder.

Unless otherwise specified, reassembly is performed by reversing the sequence. The diagrams in Figure

A-2 1, which are provided as reference for disassembly and reassembly, show an exploded view of the

parts configuration.

The required tools are listed in Table 3-6.

Table 3-6. Tools for Assembly or Disassembly

Designation Philips screwdriver No.2 E-ring holder #6

o: Commercially available

Availability

o o

Part No. B743800200

B740800800

CAUTION

For safety, gloves should be worn during disassembly and assembly. Dismount the cut sheet feeder from the printer before starting disassembly. Do not allow oil or grease to contaminate the paper path. If contamination does occur, wipe it away

with alcohol.

WARNING

If it is necessary to replace one of the paper loading rollers, both right and left rollers must be replaced

at the same time.

;

---

3-1o

‘. . . .

Page 95

1. Remove side covers L and R.

REV.-A

Side cover (L)

.,.

Figure 3-5. Side Cover Removal

2. Remove the E-ring (6) on the paper loading roller shaft, and then

remove the shaft.

E-ring (6)

Side cover (R)

Figure 3-6. Paper Loading Roller Shaft Removal

3-11

Paper Loading Shaft

Page 96

REV.-A

3. Remove the 2 E-rings (6) on the paper support shaft.

$!:?.,

. . . . .

E-ring (6)

Figure 3-7. E-Ring Removal

Remove the shaft holder fastening the paper support shaft to frame

E-ring (6)

Shaft Holder

Frame

Figure 3-8. Shaft Holder Removal

3-12

Page 97

5. Remove the E-ring (6) on the paper support shaft (See Figure 3-9)

6. Lift, together, the hopper unit and the paper support shaft.

Paper Loading Roller

REV.-A

Shaft Holder

Figure 3-9. Hopper Unit Removal

E-ring (6)

support

ection

3-13

Page 98

REV.-A

3.2.4 Cut Sheet Feeder Preventive Maintenance

The cut sheet feeder C806 12* is well designed and requires only a minimum of preventive maintenance, as follows:

a) General cleaning of the device. b) Checking the mechanical functions.

3.2.4.1 Cleaning

a) Brush off all paper dust. b) Check the surfaces of the paper loading and paper ejecting rollers.

NOTE: If one of the paper loading rollers is damaged, or if wear is uneven, both rollers must be replaced.

...,

f“

:,,

,.,, ,,

WARNING

Regularly check the shafts of the paper loading and paper ejecting rollers. If the printer fails to move

the paper, open the right side cover and check the gear wheels for wear or damage.

3.2.4.2 Lubrication EPSON recommends that the points indicated in Figures 3-10 and 3-11 be lubricated with EPSON O-3 and G-1 4 (see Table 3-7). These lubricants have been thoroughly tested and have been found to fully

comply with the needs of the cut sheet feeder.

Table 3-7. Lubricants

Part

Classification

Oil

Grease

E: EPSON exclusive

Lubricate the paper

Designation

o-3

G-1 4

product

support shaft and the paper holder shaft using a cloth moistened with O-3.

Capacity

40 cc

40 g

Availability

E E

B7 10300001

B701

No.

400001

*. ,.

.$.-.

,.,

(

Left

—

Paper’

SuppOr’t

Cloth

Paper Support Shaft

Hol;~r Shaft

Pager

Figure 3-10. Lubrication

3-14

Point (1)

R,,,

Paper Support

Page 99

REV.-A

Figure 3-11. Lubrication Point (2)

3-15

Page 100

REV.-A

3.3

PULL TRACTOR

The optional pull tractor

especially useful with continuous

3.3.1 Pull Tractor Operation

When using the push-pull feed method, set the paper holes onto the pins along the sprocket wheel,

and also onto the tractor pins along the tractor belt. The paper-feed motor is driven, via the pinion on the motor’s shaft, to rotate the gears in the direction shown in Figure 3-12. The gears, in turn, rotate the sprocket wheels and tractor belt, advancing the paper in the direction indicated by the arrow.

Shifting the release lever forward moves the feed rollers away from the platen and releases the feed.

C80006*

/’”

provides optimu,m continuous paper handling. The pull tractor is

multipart

forms and labels.

Paper (Continuous)

/“’”%.

Push Tractor

g!:

. .

Figure 3-12. Push-Pull Feed Operation

ion

Gear

Paper Feed Motor

3-16

Epson LX-850, LX-810 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

PREFACE

REVISION TABLE

TABLE OF CONTENTS

GENERAL DESCRIPTION

1.2 SPECIFICATIONS

PRINCIPLES OF OPERATION

OPTIONAL EQUIPMENT