Epson SQ - 1170, SQ - 870 Service Manual

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Page 1

EPSON TERMINAL PRINTER

SQ - 870/1170

4001225

REV.-A

Page 2

NOTICE

“ All

rights reserved. Reproduction 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

-i-

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

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

Signals a precaution which,

if ignored, could result in damage to equipment.

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND THE HOST COMPUTER BEFORE PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN

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.

WARNING

1. 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 PRODUCT HAS A PRIMARY-AC RATING DIFFERENT FROM THE AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EPSON 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.

KP CHIPS AND CIRCUITRY, USE STATIC

- ii –

Page 4

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the 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

SQ-870/l

170.

REV.-A

Chapter 1 -

Chapter 2 -

Chapter 3 -

Chapter 4 -

Chapter 5 -

Chapter 6 - Describes preventive maintenance techniques.

‘

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.

Includes a step-by-step guide for product disassembly and

assembly.

Includes a step-by-step guide for adjustment.

Provides Epson-approved techniques for troubleshooting.

–

iv -

Page 5

REVISION SHEET

REVISON DATE ISSUED CHANGE DOCUMENT

Feb. 21, 1992

1st issue

,:.;-.

..,,.

-v-

Page 6

REV.-A

CHAPTER 1.

CHAPTER 2. CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENTS CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE

APPENDIX

GENERAL DESCRIPTION OPERATING PRINCIPLES

vi –

Page 7

REV

CHAPTER 1

GENERAL DESCRIPTION

1.1

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

1.2

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-3

1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.2 Firmware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3

INTERFACE Overflew....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.1 Parallel interface...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4

CONTROL PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5

DIP SWITCHES AND JUMPER SETTING ......................................1-18

1.5.1 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.2 Jumper Setting

1.6

OPERATING

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5

1.6.6

1.6.7

1.6.8

INSTRUCTIONS...

Self.Test...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Paper-out Detection and Forms Override Function . . . . . . . . 1-20

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Buzzer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sheet Loading and Sheet Ejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

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

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

. . . . . . . . . . . . . . . . . . . . . . 1-20

1-3

1-9

..1-14

........1 -14

....1 -16

1-18

1-19

1-20

..............1 -20

1-21

...........1 -21

.........1 -22

1.6.9

1.6.10 Adjust Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6.11 Printhead Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6.12 Ink Charge

1.6.13 Ink End Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6.14 Cover Open Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

1.7

MAIN COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7.1

1.7.2 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7.3

1.7.4 Printer Mechanism

1.7.5 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tear-off Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

C076

MAIN Board (Main Control Circuit Board)

C076

PSB/PSE Board (Power Supply Circuit Board)

(M.471

O/476 O).....................................l.28

............l-26

......................1 -28

1-23

.....1 -24

1-24

1-25

......1 -27

....l-27

I.i

Page 8

REV.-A

LIST OF FIGURES

Figure 1-1. Figure 1-2. Figure 1-3. Figure Figure 1-5.

Figure 1-6. Figure 1-7. Figure 1-8. Figure 1-9. Figure 1-10. Control Panel Figure 1-11. Lever Positions

Figure 1-12. Figure 1-13. Figure 1-14. Control Panel Figure 1-15.

Figure 1-16. Model-4710/4760 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Figure 1-17. Housing

Exterior View of the

Nozzle Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Release Lever Positions

14.

Label Size

Printable Area for Cut Sheets Printable Area for Continuous Papers

Printer Operating Environment Character Matrix

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

SQ-1 170 Component Layout

C076

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

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

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

MAIN Board

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

PSB/PSE Board

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

SQ-1 170

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

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

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

...........................................................l

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

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

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

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

1-2

.....1-3

1-4

1-5 1-6 1-6 1-8 1-13

. 1-14

1-16

1-23 1-25 1-26 1-27

-27

1-28

Table 1-1. Table 1-2. Table 1-3. Table 14. Table 1-5.

Table 1-6. Table 1-7. Table 1-8. Table 1-9. Table 1-10. Table 1-1

Table 1-12.

Table 1-13.

Table 1-14. Table 1-15. Table 1-16.

LIST OF TABLES

Interface Options

Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications for Continuous Papers Envelopes Labels Specifications

Built in Bit-map Fonts

Printing (Text Mode) Printing (Bit Image Mode) Character Matrix and Character Size

Connector Pin Assignments and Signal Functions . . . . . 1-14

Settings for DIP Switch

Settings for DIP Switch 2 (SW2).......... . . . . . . . . . . . . . . . . . . . . . . . . . . .

International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page Length Lever Positions

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

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

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

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

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

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

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

(sw1)................................-.....1-18

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

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

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

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

1-1

1-2

1-4

1-4 1-5 1-5

1-9 1-1o 1-11 1-12

1-18

1-19

1-19 1-23

,..

...

Iii

Page 9

1.1 FEATURES

The

SQ-870/l

that is upper compatible with the

●

Use of Ability to print multi-point fonts Ability to receive and print raster graphic images Compatibility with the Printing speeds:

●

660 550 240 200

●

Optional interface card Clear, easy-to-read printing with standard EPSON fonts

●

Multiple fonts resident in the printer

●

2 scalable fonts (Roman, Saris Serif) 8 LQ bit-map fonts (Roman, Saris Serif, Courier, Prestige, Script, Script C, Orator, Orator-S)

1 draft bit-map font

Control panel switch selection of fonts, pitch, and cut-sheet feeder

●

Optional tractor unit that can make up push-pull tractor Easy handling of cut sheets with the optional cut-sheet feeder

●

Continuous Paper Two ways to insert continuous paper (front/rear path) Backout & loading Continuous paper can be used without removing Standard tractor unit can be attached in two positions (front/rear) Cut Sheet

●

Two ways to insert cut sheets (front/top) Auto loading

170 is a high speed 48-nozzle ink jet printer which provides advanced paper handling

ESC/P

2 control codes

cps (draft, 12 cpi) cps (draft, 10 cpi)

cps (LQ, 12 cpi) cps (LQ, 10 cpi)

LQ\SQ

TSQ-4800.

series available on the market

The printer’s main features are as follows:

(CSF) bin

CSF

REV.-A

The

SQ-870/l

options ensure compatibility with a wide variety of computers. Table 1-1 lists the interface options, Table

1-2 lists the optional units available for the

the

SQ-870/l 170

170 is equipped with the standard EPSON 8-bit parallel interface and various interface

SQ-870/l

170, and Figure 1-1 shows an exterior view of

Table 1-1. Interface Options

Descriptions

1-1

NOTE: Refer

Model

C82305 C82306 C82307 C82308

C82310 C82313

to the “Optional Interface Technical Manual” for details.

Serial interface card (inch screw) Serial interface card (mini screw)

32KB serial interface card (inch screw) 32KB

serial interface card (mini screw)

32KB parallel interface card 32KB IEEE-488 interface card

Page 10

REV.-A

Table 1-2. Optional Units

Model

I C80647

C80648

C80637 Second bin hopper (80 columns)

Single-bin cut-sheet feeder (80

Single-bin cut-sheet feeder (136 columns)

Descriptions

columns]

IC80640 I

C80023 C80024

SO2OO1O

Second

Figure 1-1. Exterior View of the S(2-870/1 170

binhopper(136

Tractor unit (80 columns) Tractor unit (136 columns) Ink cartridge

columns)

1-2

.,,

Page 11

1.2 SPECIFICATIONS

REV.-A

This section provides specifications for the

1.2.1

Hardware Specifications

SQ-870/l

170 printer.

Printing method On-demand type ink jet system

Nozzle configuration

48 nozzles (48 X

‘o

‘g

●

1/45”

diagonal)

‘

(7.125°)

47/45”

Figure 1-2. Nozzle Configuration

Feeding methods

Friction feed (front/top) Push tractor feed (front/rear) Push-pull tractor feed (with optional tractor) (front/rear)

NOTE: Do not perform pull tractor feed.

Line spacing Paper insertion

Paper-feed speed

1/6 inch, 1/8, or programmable in units of 1/180 or 1/360 inch

Friction feed —

Tractor feed — Front or rear

Friction without

Friction with

Tractor 45

Front or top side

side

CSF 45 msec (1/6-inch feed)

4.5 inches per second

CSF 49 msec (1/6-inch feed)

4.0

ips (continuous)

msec (1/6-inch feed)

4.5

ips (continuous)

(ips) (continuous)

NOTE: Following are the precautions for handling paper.

Friction feed (release lever in FRICTION POSITION).

The paper must be loaded from the front or top entrance.

●

Do not use continuous paper.

●

Do not perform any reverse paper feeds within the top 8.5 mm (.34 in.) or bottom 22 mm (.87 in.) area.

●

Do not perform reverse feeds greater than 1/6 inch after a paper end has been detected.

●

Push tractor feed (release lever in REAR PUSH POSITION or FRONT PUSH POSITION).

The paper must be loaded from the front or rear entrance.

●

Release the friction-feed mechanism.

●

Do not perform reverse feeds greater than 1/6 inch.

●

Since accuracy of paper feed cannot be assured after the paper end has been detected, do not perform reverse feeding after the detection of a paper end.

1-3

Page 12

REV.-A

3. Push-pull tractor feed (release lever in REAR PUSH POSITION or FRONT PUSH POSITION).

● The paper must be loaded from the front or rear entrance.

● Release the friction-feed mechanism.

● Attach the pull tractor unit.

O Ensure that there is no slack in the paper between the platen and the pull tractor.

● Precisely adjust the horizontal position of the pull tractor and push tractor.

● Paper for multiple copies must be spot pasted on both side of the perforation

holes.

betvveen

the tractor

● Do not perform reverse feeds greater than 1/6 inch.

● Do not perform a reverse feed after the paper end has been detected.

Figure 1-3. Release Lever Positions

Paper specifications See tables 1-3, 1-4, 1-5, and 1-6

Table 1-3. Specifications for Cut Sheets

Width

Length

Thickness 0.065 mm to 0.10 mm (0.0025 in. to 0.0039 in.)

Weight Quality

182 mrn to 257 mm

182 mm to 420 mm (7.2 in. to 16.5 in.) (136 columns) 182 mm to 364 mm (7.2 in. to 14.3 in.)

14 lb to 22

lb (52.3

Standard paper (photocopier paper, etc.)

(7.2 in. to 10.1 in.) (80 columns)

g/m2

Table 1-4. Specifications for Continuous Papers

Width

Quality Thickness Weight

I 101 mm to 254 mm (4.0 in. to 10.0 in.) (80 columns)

101 mm to 406 mm (4.0 in. to 16.0

Stan

jard

paper

0.065 mm to 0.10 mm (0.0025 in. to 0.0039 in.)

lb to 22 lb (52.3 g/m2 to 82

to 82 g/m2)

g/m2)

Rear Push Position

Release Position

in.)

(136 columns]

1-4

f-’

..:

i..)

Page 13

Table 1-5. EnveIo~es

REV.-A

Size

Thickness

Weight Quality

[

NOTES: ● Printing on envelopes is available only at normal temperatures and only using top

insertion.

● Keep the longer side of the envelope horizontal during insertion.

● Place the left edge of a No. 6 envelope at the sheet guide setting mark.

Label size

Copies

Thickness 0.22 mm (0.0079 in.) maximum

NOTES: ● Printing on labels is available only at normal temperatures.

● Labels must be of the continuous type.

● Examples of labels AVERY CONTINUOUS FORM LABELS

No. 6 166 mm X 92 mm (6.5 in. X 3.625 in.) No. 10240 mm X

0.16 mm to 0.52 mm (0.0063 in. to 0.0197 in.) Differences in thickness within the printing area must be less

than 0.25 mm (0.0098 in.)

12 lb to 24 lb (45

Bond paper, standard paper, airmail

Table 1-6. Labels Specifications

2.5 in. X 0.94 in.

4.0 in. X 0.94 in.

4.0 in. X 1.44 in.

These three kinds of labels are recommended.

AVERY MINI-LINE LABELS

104 mm (9.5 in. X 4.125 in.)

g/m2

to 91

g/m2)

r’

36.5mm .44inch)

23.8mm (0.94inch)

F;;::~?nch)-

Figure 1-4 Label Size

‘

1-5

Page 14

REV.-A Printable area

See figures 1-5 and 1-6

13.5rnm (0.53-inti)

182-257mm ~.2-10.lind?)

or more

60cdm

● 1: 80 columns: 3.0 mm (0.12 in.) or more when the width of paper is less than 229 mm (9 in.).

13 mm (0.51 in.) or more when the width of paper is 257 mm (10.1 in.).

136 columns: 3.0 mm (O. 12 in.) or more when the width of paper is less than 364 mm (1 4.3 in.)

25 mm (0.98 in.) or more when the width of paper is 420 mm (16.5 in.).

~~•

NOTE: The paper feed accuracy can not be assured within the following area.

Front insertion: 47 mm (1 .85 in.) from the bottom edge of paper. Rear insertion: 26 mm (1 .02 in.) from the bottom edge of paper.

Figure 1-5. Printable Area for Cut Sheets

Printable

9mm

or more

(0.35inch)

9mm

or more

(0.35inch)

Printable

101 -254mm

101 -406mm

●

max. 203mm (6.

0 0

area

0 0

ABC

o 0 0 0

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

: o

0 o

ABC

-f-

[4-16inch)

Printable area

(13.6inch):

345mm

(4-10inch)

Oinch)

: 60 columns

136 columns

: 60 columns

: 136 columns

XYZ:

-1

XYzo

●

0 0 0 0 0

0 0 0 0

o 0 0

o 0

>$’

1: 80 columns:

●

136 columns:

13 mm (0.51 in.) or more when the 101 mm (4.0 in.) to 241 mm (9.5 in.) width paper is used. 26 mm (1 .02 in.) or more when the 254 mm (1 O in.) width paper is used.

13 mm (0.51 in.) or more when the “101 mm (4.0 in.) to 377.8 mm (1 4.87 in.) width paper is used.

15 mm (0.59 in.) or more when the 381 mm (15 in.) to 406 mm (16 in.) width paper is used.

Figure 1-6. Printable Area for Continuous Papers

1-6

@’

Page 15

REV.-A

Ink cartridge

Type: Color: Black

Ink capacity:

Print capacity (depending on the cleaning operation):

Ink life: 2 years from production date Storage temperature:

Dimension of cartridge:

Exclusive ink cartridge

105 to 115 cc

Draft: Letter Quality: 3 million characters

–30 to 40 degrees C (–22 to 104 degrees F) -Storage

(within a month at 40 degrees C (104 degrees F))

–30 to 60 degrees C (–22 to 140 degrees F) -Transit (within a month at 40 degrees C (104 degrees F)) (within 120 hours at 60 degrees C (140 degrees F))

24.8 mm (W) X 138 mm (D) X 99.3 mm (H) (0.98 inch X 5.43 inch X 3.91 inch)

6 million characters

NOTES:

●

Ink will be frozen under –7 degrees C (19 degrees F) environment, however it will be usable after placing

it at room temperature. (It will take approx2.5 hours until melting at 25 degrees C (77 degrees F).)

● Do not use the ink cartridge which has been stored longer than the ink life.

Reliability

Life of

Safety approvals Safety

Electrical specifications 120 V version Rated voltage

printhead

Mean cycles between failures Mean time between failures

4000 million dots/nozzle

standardsULl

Radio frequency interference

950 with D3 (U. Aversion)

CSA22.2#220

EN 60950 (TUV) (European version)

Input voltage range Rated frequency range Input frequency range Rated current

Power consumption

Insulation resistance

(MCBF) 5 million lines (excluding printhead)

(MTBF)

(RFI)

4000 power on hours

duty)(SQ-870)

6000 power on hours (POH)

duty)(SQ-1 170)

FCC class B (U. Aversion)

VDE0871 (self-certification) (European version)

120

VAC

103.5 to 132

50 to 60 Hz

49.5 to 60.5 Hz

0.6 A

Approx. 30 W Approx. 30 W (SQ-1 170)

(during a self-test in draft mode, 10 cpi)

10 Megohms minimum (at 500 VDC

between AC line and chassis).

VAC

(POH) (25%

(SQ-870)

(25’%.

1-7

Page 16

REV.-A

Environmental

conditions

Dielectric strength

220/240

version

Rated voltage Input voltage range Rated frequency range Input frequency range Rated current Power consumption

(during a self-test in draft mode, 10 cpi)

Insulation resistance

between AC line and chassis).

Dielectric Strength

VAC rms 1 second (between AC line

and chassis)

Temperature

10 to 35 degrees C (50 to 95 degrees F) – operating

–30 to 60 degrees C (–22 to 140 degrees F) -in shipment

container

Humidity 20 to 80 % RH - operating

5 to 85 % RH - storage

1000

VAC rms 1 minute or 1200

VAC rms 1 second (between AC line

and chassis) 220 to 240

198 to 264

VAC VAC

50 to 60 Hz

49.5 to 60.5 Hz

0.4 A

Approx. 30 W

(SQ-870)

Approx. 30 W (SQ-1 170)

10 Megohms minimum (at 500 VDC

1250

VAC rms 1 minute or 1500

.,.-:.

.,,

”’-

NOTE: Figure 1-5 shows the operating environment.

Figure 1-7. Printer Operating Environment

Resistance to shock Resistance to 0.25 G, 55 Hz, vibration

Physical specifications Weight

Dimensions 462 mm (width) X 325 mm (depth) X 205 mm (height)

1 G, within 1 ms - operating

2 G, within 1 ms - storage

0.50 G, 55 Hz,

9.5 Kg,

approx. (2 1.0 pounds, approx.)

12.2 Kg, approx. (27.0 pounds, approx.) (SQ-1 170)

18.2

in(width) X 12.8 in(depth) X 8.1 in(height)

657 mm (width) X 325 mm (depth) X 205 mm (height)

25.9

in(width) X 12.8 in(depth) X 8.1 in(height) (SQ-1 170)

Temperature (“c)

max - operating max - storage

(SQ-870)

1-8

Page 17

REV.-A

1.2.2 Firmware

Control code Printing direction

Input data buffer

Character code Character tables

Bit-map fonts

Scalable fonts

EPSON Roman EPSON Saris-serif

EPSON Courier EPSON Prestige EPSON Script EPSON Script-C EPSON Orator

EPSON Orator-S EPSON DRAFT

Specifications

C/PTM

Bi-directional with logic seeking (text printing)

Uni-directional

16KB (Standard)

128KB (factory option) 8 bits Italic character table, PC 437, PC 850, PC 860, PC 863, PC 865 (PC indicates

character table for Fonts and pitches See table 1-7 EPSON Roman EPSON Saris-serif

Family No. I 10 CPI I 12 CPI I 15 CPI I Proportional

level 2 (EPSON standard code for printers)

(bit-image printing)

personal computer)

8 pt to 32 pt 8 pt to 32 pt

Table 1-7.

1 2 3 4

..-

Built in

Bit-ma~

Fonts

0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0

“

0 0 0

0 0

0 0 0

x x

●

. .

●

0-- Resident

Desired pitch is made by software using selected font

print Roman 15

CPI

xx -- Print LQ proportional font selected by ESC k

Printing modes

Selection and mixture of the following modes are allowed, excluding 15 condensed mode:

O Print quality (draft/letter quality) O Character pitch (1 O, 12, 15, or proportional) O Condensed O Double-width O Double-height O Emphasized O Double-strike O Italic O Underlined O Double-underlined O Overscore O Strike-through

O Outline

O Shadow

1-9

cpi

Page 18

REV.-A Printing speed

Printing columns Character matrix Character size

Pitch

Con-

densed

0 0 0 80 136 0 0 0

0 0 0 0

See Tables 1-8 and 1-9.

See Table 1-8. See Table 1-10. See Table 1-10.

Table 1-8. Printing (Text Mode)

Empha-

sized

x x

Double

width

0 96

Printable Columns

COi.

40 68 80 40

137

68 116 96

136

233

163

Col.

Charactar Printing Speed

Pitch

(cpi)

17.1

8.5 12

(Cps)

Draft

550 275 100 400 200 100 684

342 660

330 120

480

200

342

171

240

CPI:

CPS:

LQ:

0 0 0

0 0

characters per inch characters per second letter quality

1 x x

1 1

48 81 6 240 120

160 272 20

80 136

120

204

102 7.5 412

204

102

Cannot be condensed

7.5

800 400

825 300

600

300

400 200

150

300

150

1-1o

(’J

,<..

Page 19

Pins

REV.-A

Table 1-9. Printing (Bit Image Mode)

Dot

Density

(DPI)

Adjacent

Dot

Printing

Yes

256 X n2 + nl

80 Columns

480 816

136 Columns

Printing

Speed

(IPS)

DPI: IPS:

2 3 4

32 60 33 38 90

40 360 71 72 360 73 360

dots per inch

inches per second

120 120

240

120

180

Yes

No No

Yes

Yes Yes Yes Yes Yes

Yes

960 960

1920

640

720 1224 55 480 960 720

1440 2448 20

2880

1440 2448 20 2880 2880

1632 20 1632

3264

1088

816 55 1632 20 1224 55

4896 20

4896 20 4896 20

20 20

1-11

Page 20

REV.-A

Table 1-10. Character Matrix and Character Size

Printing Mode

;

Draft, 10 pitch

Draft, 12 pitch

Draft, 15 pitch 11 X 32 Draft, 17 pitch 15 x 44 Draft, 20 pitch 13 x 44

LQ,

10 pitch

LQ,

12 pitch 27 X 22

LQ,

15 pitch 22 X 16

LQ,

17 pitch 16 X 44

LQ,

20 pitch

LQ,

proportional Max. 37 X 44

LQ,

proportional,

super/subscript Min. 12 X 32

Face Matrix

15 x 44

13 x 44

31 x 22

14 x 44

Min. 18 X 44

Max. 28 X 32

HOD Character Size

180 180

180

360 360 360 360 360 1.6 X 2.3

360 360

2.1 x 3.1

1.s

X 3.1

1.6 X 2.3

1.1 x 3.1

0.9 x 3.1

2.2 x

3.1

1.9 x 3.1 180

1.1

x 3.1

1.0

x 3.1

2.6 X 3.1 180

1.()

x 3.1

1.8 X 2.3 180

0.7 X 2.3

Unit

ESC

120

120 180

180 180

180

NOTES: ●

HDD

is horizontal dot density in dots per inch.

● Face matrix and character size indicate the maximum size of a character. This value is

dependent on paper, etc.

● Unit

ESC

sp (which also can be sent as unit, followed by the character string

indicates the minimum length to be added to the right of the character specified in the

SP control code.

CHR$(&h20)),

ESC

1-12

..; ,

Page 21

(Normal character)

REV.-A

39 40 41

46 47

2 3 4 5 6 7

. .

/T/

/s/

(aO)

Ascender area

Descender area

Character width (CW)

/y/ //

c E

(a2)

(Sub-script character)

From dot No. 1 to 16 are not

17 18

. . .

45 46

47 48

;

3 4

. .

I while

(Super-script character)

From dot No. 33 to 48 are not

used while superscript printing.

subscri~t txinting.

—

. .

29 30 31 32

Figure 1-8. Character Matrix

1-13

Page 22

REV.-A

1.3 INTERFACE OVERVIEW

The printer has a parallel interface with the

1.3.1

Parallel Interface

Specifications for the 8-bit parallel interface are as follows:

Data format Synchronization Handshaking BUSY and Signal level

Adaptable connector 57-30360 (Amphenol) or equivalent

Data transmission timing See Figure 1-9.

BUSY

ACKNLG

DATA

STROBE

o.5#s

min.

specifications described below.

8-bit parallel STROBE signal

ACKNLG signal

ITL-compatible

[

o.5/.ls

min.

o.5/ls

min.

511s

5ps

typ.

‘

Figure 1-9. Data Transmission Timing

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

Table 1-11. Connector Pin Assignments and Signal Functions

Pin No.

2 3 4 5 6 7 8

Signal Name

Return Dir.

Pin No.

STROBE

DATA 1 DATA 2 DATA 3 22

DATA 4 23 DATA 5 24 DATA 6 25 DATA 7 26 DATA 8 27

ACKNLG

20 21

28 OUT

IN IN IN IN IN IN IN

STROBE pulse to read the input data. Pulse width must be more than 0.5Ks. Input data is latched at falling edge of this signal.

Parallel input data to the printer. HIGH level means “ 1“. LOW level means “O”.

This pulse indicates data has been received and the

printer is ready to accept more data. Pulse width is

approximately

Functional Description

Ips.

,-.’ ,

11 12

BUSY

SLCT

OUT OUT

OUT

HIGH indicates the printer cannot accept more data. HIGH indicates paper out. This signal is effective only

when the ERROR signal is LOW, Always HIGH output (Pulled up to

ohm resistor.)

1-14

+5V

through a 3.3K

Page 23

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

Pin No.

15 16

17 18

19 to 30

32 33 34 35

Signal Name

AUTOFEED-XT

GND

Chassis

GND

I NIT

ERROR

GND

SLCT-IN

Return Dir.

Pin No.

. .

OUT

. .

OUT

IN If LOW when the printer is initialized, DC

Functional Description

If LOW when the printer is initialized, the printer

automatically performs a CR code (Auto LF).

Not used.

line feed upon input of the

Ground for twisted-pair grounding. Chassis ground level of printer. Not used. Ground for twisted-pair grounding. Pulse (width:

initialization.

50ws,

min., active LOW) input for printer

LOW indicates an error has occurred in the printer.

Ground for twisted-pair grounding. Not used.

+5V

Always HIGH. (Pulled up to

resistor.)

through 3.3K ohm

l/DC3

control is disabled.

NOTES: 1. “Dir.” indicates the direction of the signal flow as viewed from the printer.

“Return Pin No.” denotes a twisted-pair return line.

3. 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

5. The AUTOFEED-XT signal can be set to LOW by DIP switch 2-4.

6. The SELECT-IN signal can be set to LOW by jumper 1.

7. Printing tests, including those of the interface circuits, can be performed without using

external equipment by setting DATA 1 -DATA 8 pins to the STROBE signal.

0.2Ks.

1-15

Page 24

REV.-A

1.4

CONTROL PANEL

On the control

panel are: 10 non-lock type buttons, and 24 indicators.

——

Lom

-!.

I 0

111—

Figure 1-10. Control Panel

BUTTONS

(1) PAUSE Button This button controls printer action. Pressing the button toggles the printer between PAUSE condition (no printing, no paper feeding, or no data

(2) FORM FEED Button Advances the paper to the next top of from position. This switch is also used for the micro feed function.

(3) LINE FEED Button Advances the paper by one line ( 1/6 fed continuously until releasing this switch. This switch is also used for the micro feed function.

acception) and RUNNING.

inch)By pressing this switch more than 0.5 second, the paper is

(4) LOAD/EJECT Button Pushing this switch loads the paper when paper-out condition is detectedAnd ejects the paper when

out of paper condition is not detected as in the Forms Override function.

(5) TEAR-OFF/BIN l/BIN 2 Button

tractor-feed mode, pressing this button advances continuous paper to the tear-off position, and the TEAR-OFF indicator is and the selected BIN indicator is lit.

(6) MICRO FEED Button

Selects or cancels the micro feed function. When this function is enabled, the MICRO FEED indicator is lit. In the micro feed mode, the LINE FEED button is used to feed the paper forward, and the FORM FEED button is used to feed the paper backward.

Paper feed performed by this micro feed function does not affect the page position control. And this

func!ion is also used to adjust the paper loading position and to adjust the continuous paper to meet

the tear off edge.

(7) FONT Button

Pressing this button selects a font, and pressing it continuously selects the following ones in sequence. The

‘ONT

LED indicates the currently selected font.

Iitln friction-feed mode, pressing this button toggles between bin 1 and bin 2,

.’)

c“

1-16

Page 25

REV.-A

(8) PITCH Button

Pushing this switch once selects the character pitch. And holding this button down selects the following

ones in sequence. PITCH indicators indicate the currently selected character pitch.

(9) RESET Button

Holding this button down more than 0.45 second, the input data buffer is cleared and the printer initialized by software as ESC

(10) CLEANING Button Holding this button down more than 0.5 second, the print head cleaning is performed. This button is

only effective in the PAUSE condition. The CLEANING button is located inside the DIP switch cover.

Cl?.

INDICATORS

(1) POWER (green)

when the printer’s power switch is on, and AC power is supplied.

Lit

(2) PAUSE (orange)

Lit when the printer is in PAUSE mode (no printing, no paper feed, or no data accepting).

(3) DATA (orange) Lit when the printer has received data from the host machine.

(4) PAPER-OUT (red)

Lit when the paper-out detector detects no paper. Refer to Section 1.6.3, Paper-out Detection and Forms Override Function.

(5) INK END (red)

Lit when the printer detects the ink empty condition.

(6) MICRO FEED (orange) Lit when the micro feed function is enabled.

(7) TEAR-OFF (orange) Lit when the sheet is advanced to the tear-off position.

(8) BIN 1 (green) Lit when bin 1 is selected.

(9) BIN 2 (green) Lit when bin 2 is selected.

(1 O) FONT (green) --Draft, Courier, Roman, Saris Serif, Prestige, Script, Script C, Orator, Orator-S

These indicators show the currently selected font.

(1 1) PITCH (green) --10

These indicators show the currently selected pitch.

CPI, 12 CPI, 15 CPI, 17 CPI, 20 CPI, PS

1-17

Page 26

REV.-A

1.5 DIP SWITCHES AND JUMPER SETTING

This section describes the DIP switch selections and jumper setting for the

1.5.1 DIP Switch Settings

The two DIP switch banks for the printer, located on the control panel, are conditions as shown in tables 1-12 through 1-15. (Note that the status of the at power on or upon receipt of the INIT signal.)

Table 1.12. Settings for DIP Switch 1 (SW1)

No.

International

character set

3 4

5 6 7 OFF 8

selection

Character table selection Graphic print direction Not Used

Description ON

See

and

Table 1-14

Graphic Italic

Unidir.

OFF

Bidir.

SQ-870/l

used to set various print

DIP switches is read only

170 printer.

Factory

Setting

ON ON ON

OFF OFF OFF

OFF

Table 1-13. Settings for DIP Switch 2 (SW2)

No.

Page length of continuous paper

inch skip for continuous paper

Auto LF

Description

See Table 1-15

ON OFF

OFF

I ,

Factory Setting

[

OFF

OFF OFF OFF

I I

1-18

Page 27

1-1

1-2

Table 1-14. international Character Set Selection

1-3

Country

REV.-A

ON ON ON ON ON

ON OFF OFF U.K. OFF ON ON OFF ON OFF OFF OFF

OFF

OFF OFF

OFF

Us. France Germany

Denmark 1 Sweden Italy

Spain 1

437 850 860 863

865 (437) (437)

(437)

Table 1-15. Page Length

2-1

OFF OFF

OFF

2-2

OFF

ON ON

Page Length

11 inches

12 inches

8.5 inches 70/6 inches

When SW 1-4 is ON,

If italic table was selected by

ESC

t O, country setting becomes U.S.

When SW 1-4 is OFF, if graphic table was selected by

ESC

t 1, PC becomes 437.

1.5.2 Jumper Setting

If Jumper 1 is connected to GND, the SLCT-IN signal is fixed to LOW and DC

l/DC3

control is ignored.

1-19

Page 28

REV.-A

1.6 OPERATING INSTRUCTIONS

This section describes the self-test and hexadecimal dump functions as well as the error states, printer initialization, and buzzer operation.

1.6.1 Self-Test

To run the self-test using draft mode, turn the printer on while pressing the LINE FEED button. To run the self-test using the letter quality (LO) mode, turn the printer on while pressing the FORM FEED button. You can stop or start self-test printing by pressing the PAUSE button. When you are satisfied with the self-test, stop the printing by pressing the PAUSE button and turn the printer off.

The firmware revision number is printed on the first line of the self-test, followed by the current DIP

switch settings.

1.6.2 Hexadecimal Dump Function

To put the printer in hexdump mode, power it on while pressing both the LINE FEED and FORM FEED buttons. In

hexdump

the corresponding ASCII characters. This function is useful 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.

mode, the printer prints out the hexadecimal representation of the input data, along with

“i” ,,

1.6.3 Paper-out Detection and Forms Override Function

When the paper-out detector detects a paper-out condition, the printer enters the PAUSE mode with

the following status.

PAPER OUT indicator lit BUSY signal becomes HIGH ERROR signal becomes LOW PE signal becomes HIGH

In the PAUSE mode, you can perform the “Forms Override” function by pressing the PAUSE button, or continue the printing operation by pressing the PAUSE button after loading new paper. In the forms override function, the printer ignores the paper-out condition temporarily and prints additional lines beyond the bottom line specified for the page. Once the “Forms Override” function is performed, the paper-out detection will not be enabled until paper is loaded.

1.6.4 Error Conditions

If the following conditions are detected, the printer recognizes them as errors and enters the error mode.

● Paper-out

Paper-out is detected after performing paper loading operation.

. . .

.“..

‘) :

. Ink end

Ink end condition is detected. Perform 200 lines of printing or remove the ink cartridge.

1-20

Page 29

REV.-A

● Cover open

The printer lid is opened.

● Fatal errors

In the following cases, the printer recognizes them as fatal errors and enters the fatal error mode. The

fatal error condition cannot be recovered until turning the power off.

● Carriage does not move correctly

● Control circuit cannot work correctly

When the error condition is detected, the printer automatically enters ‘PAUSE’ mode and outputs appropriate interface signal. When parallel interface is selected, the following interface signals are outputted to indicate the error and to stop data transmission.

● BUSY signal becomes HIGH

● ERROR signal becomes LOW

● Output no ACKNLG pulse

● PE signal becomes HIGH (only paper out error)

1.6.5 Buzzer Operation

The buzzer sounds under the following conditions:

● A paper-out error is detected (beeps 3 times for 0.1 second respectively, with 0.1 second intervals).

● Ink end error is detected (beeps 5 times for 0.1 second respectively, with 0.1 second intervals).

● Cover open error is detected (beeps 5 times for 0.1 second respectively, with 0.1 second intervals).

● Fatal error is detected (beeps 5 times for 0.5 second respectively, with 0.5 second intervals).

● When panel setting is accepted (beeps 1 time for 0.1 second).

1.6.6 Printer Initialization

There are three initialization methods: hardware initialization, software initialization, and panel initialization.

(1) Hardware initialization

This type of initialization takes place when the printer power button is turned on with the AC power cord plugged in or when the INIT signal is received.

When the printer is initialized, it performs the following actions:

(a) Initialize printer mechanism. (b) Clears input data buffer. (c) Clears downloaded character set. (d) Clears print buffer.

(e) Returns printer settings to their default values.

1-21

Page 30

REV.-A

(2) Software initialization

Input of the

perform functions (d) or(e) above. The settings changed by the last

ESC C2 command also initialize the printer. Printer initialization by

SelecType operation are maintained.

ESC C?

code does not

(3) Panel initialization

This printer can be initialized by pressing the RESET button on the front panel. When the printer is initialized in this method, the functions (b), (d) and (e) above are not performed. The settings changed by the last

SelecType

operation are maintained.

1.6.7 Default Values

When the printer is initialized, the following default values are set:

Page position Left and right margins

Line spacing Vertical tabs Horizontal tabs Family number of type style Download characters

Character spacing Printing effects Printer condition

The current paper position becomes the top-of-form position

Released

1/6 inch Cleared Every 8 characters (relative) Last font selected from the panel Kept - software initialization

Cleared - hardware initialization

Last pitch selected from the panel Cleared Not PAUSE

. ,.

1.6.8 Sheet Loading and Sheet Ejection

The release lever has a disengage capability of tractor unit drive mechanism. Therefore, this printer provides some improved paper handling in combination with the release

(a) Automatic cut sheet loading without cut sheet feeder Change the release lever to friction feed position and

put’a

cut sheet with the paper guide (rear or front

insertion).

A few seconds laster, the cut sheet is automatically loaded to the top-of-form position.

(b) Automatic cut sheet loading & ejection with cut sheet feeder Change the release lever to the friction feed position and the put sheet feeder. Pushing LOAD/EJECT button loads a sheet to the top-of-form printing starts, a sheet is automatically loaded to the top-of-form position.

into the tractor unit. Pushing LOAD/EJECT button loads the paper automatically to the top-of-form

position. If paper out is detected before printing

top-of-form position.

if LOAD/EJECT button is pushed when continuous paper is loaded, the paper is ejected backward to

the push tractor unit.

or front push position, and set the continuous paper

statis, the paper is automatically loaded to the

1-22

cut sheets into the hopper of the cut

positionlf paper out is detected before

lever.

. .

,-~.

‘“’

F.<

““

Page 31

REV.-A

When the paper is at the top-of-form position, the loading position is adjustable by using the ‘MICRO

FEED’ function. In the ‘MICRO FEED’ function, pushing the LINE FEED button pushes the paper forward, and pushing the FORM FEED button pulls the paper backward. The adjusted loading position is stored into the memory and remains to be effective until the power is turned off. But the adjusted loading position of the continuous paper is memorized into nonvolatile RAM, so it remains effective even if the power is turned off.

1.6.9

Tear-off Function

By pressing the TEAR OFF button when the tractor feed is selected, the paper is advanced to the tear

off position and ‘TEAR OFF’ indicator is lit.

In this condition (tear off condition), the tear off position is adjustable by using the ‘MICRO FEED’

functionln

pushing the FORM FEED button pulls the paper backward.

The adjusted position is memorized into the nonvolatile RAM and remains effective even if the power

is turned off.

the ‘MICRO FEED’ function, pushing the LINE FEED button pushes the paper forward, and

If necessary to cancel this function, press the TEAR OFF button again or press the

send subsequent data to the printer. Then the paper is fed back to the top-of-form

1.6.10 Adjust Lever Operation

The adjust lever must be set to the proper position according to the type of paper

Table 1-16. Lever Positions

Lever Position

Front

side

Rear side

Paper Type

Envelope

Label

Cut sheet

I Continuous

paper I

PAUSE button or

position.

used.

Figure 1-11 Lever Positions

1-23

Page 32

REV.-A

1.6.11

To keep

(1) Power on cleaning Performed at power on when ‘(4) Cleaning’ as defined below is not required. It takes about several seconds.

(2) Capping

In the following cases the

Printhead Protection

the print quality, several kinds

printhead

is capped. It takes about a second.

printhead

cleaning functions are performed automatically.

● Printing is stopped about 3 seconds.

● Entering the PAUSE condition.

(3) Refresh nozzles Performed about every 15 seconds during printing. It takes less than

(4) Cleaning

In the following cases the

● Turning the power on when the

printhead

cleaning is performed and it takes

printhead

has not been capped.

second.

about 20 seconds.

● Turning the power on more than 7 days after the last cleaning.

. Pressing the CLEANING button.

1.6.12 Ink Charge

Install the ink cartridge to the printer and turn the printer power on while pressing the CLEANING switch down. The ‘Ink Charge’ function is started. It takes about 3 minutes to complete this only at the first time the new printer is used.

functionlt

is needed

1.6.13 Ink End Detection

If ink end sensor detects ink end condition, ‘INK END’ indicator blinks performing 200 lines of printing, and the printer enters the ink end condition. (’INK END’ indicator is lit.) If ink cartridge is removed, ‘INK END’ indicator is lit and the printer enters the ink end condition

immediately.

1.6.14

Cover open detector is installed to stop the printing whenever the printer cover is opened. If cover open is detected, the printer enters the cover open error condition.

CAUTION:

Don’t open the printer cover while printing.

Cover Open Detection

1-24

Page 33

1.7 MAIN COMPONENTS

REV.-A

The main components of the

SQ-870/l

170 printer are designed for easy removal and replacement

to facilitate maintenance and repair of the printer. The main components are:

C076

MAIN board: the main control board; the CPU on this board controls all main functions.

Control panel unit

C076

PSB/PSE

M-47 10/4760:

[

board: the

the printer

C076 PSB/PSE Board

power supply

mechanism.

board.

C076 MAIN Board

- Printer Mechanism

M-4760

Figure 1-12. SQ-1 170

Component Layout

1-25

Page 34

REV.-A

1.7.1

The mechanism driver circuit. The

1 M byte memory space.

C076

KPD70325

Memories 5 12K\l M bits program ROM

1 M bits

8M\4M\2M/l

Gate Arrays Memory management unit Motor control unit

Driver CR motor (DC motor) driver (SLA4391) PM motor (DC motor) driver PF motor (Stepping motor) driver (STK67 12B) Printhead driver

MAIN Board (Main Control Circuit

MAIN board is the main board in the printer,

(location: IC5) is used, and the

PS-RAM

M bits mask ROM (C.G)

(E05A65)

(E05A48)

(SDH03)

(MPD

16322)

Board)

and contains a logic circuit and printer

following memories and gate arrays are assigned in the

:Ic14

:IC

19/22/23

:lC3/4/24

:Ic12

:Iclo

:Ic17 :IC16

:Ic

:lC8/9

.,; . \

,..

c’

Others

PPD70325

❑ n

:IC2

:IC21

:IC7 :IC20

:BAT 1

P-ROM 5 12K

,~i

(IC14)

o’

1 M

PS-RAM

(IC19)

“p-RAM

(IC22))

EEPROM Reset

Reset Switching Regulator Lithium

A lithium battery in the battery circuit backs up the head cleaning timer while the printer power is off.

(MB3771)

IC (PST529C)

battew

IJOQ

000

‘

(TL494)

GA E05A48 CPU

(Iclo)

~11

‘N

‘

1--1

(IC5)

BAT1/

Figure 1-13.

L05A65

C076

MAIN Board

1-26

(1C12)

Page 35

1.7.2 Control Panel

REV.-A

The Control Panel is, which includes the indicator

Figure 1-14. Control Panal

1.7.3

The power supply unit consists of a switching regulator circuit, which converts the AC line voltage to the DC voltages (for example, + 35V and

type, and the

C076

PSB/PSE Board (Power Supply Circuit Board)

5V) used by the printer. The

C076 PSE

board is

220/240V

input type.

LEDs,

switches, and DIP switches.

C076

PSB board is 120V input

Figure 1-15.

C076

PSB/PSE Board

❑

1-27

Page 36

REV.-A

1.7.4 Printer Mechanism (M-4710/4760)

The M-47 10/4760 printer mechanism was developed specifically for the components are a carriage motor, carriage mechanism, paper-feed motor, paper-feed mechanism,

TE motor, top edge holding mechanism, pump motor, pump mechanism, printhead, and sensors. This

printer mechanism allows three ways of paper insertion.

SQ-870/l

170 printer. Included

. .

-..

.,.

,’

Figure 1-16. Model-4710/4760 Printer Mechanism

1.7.5 Housing

The

LQ-870/l

control panel. The lower case contains the printer mechanism, the main control circuit board, and power supply circuit board.

170 housing consists of the upper, lower, and front cases. The front case houses the

Figure 1-17. Housing

1-28

Page 37

CHAPTER 2

OPERATION PRINCIPLES

OPERATING PRINCIPLES OF PRINTER MECHANISM..............2-1

2.1

REV.-A

2.1.1.

2.1.2. Carriage Mechanism

2.1.3.

2.1.4 Ink Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printhead Mechanism

Paper Feed Mechanism

2.1.3.1 Paper Feeding Mechanism.....................................2-6

2.1.3.2 Release Lever

2.1.3.3 Paper Insertion entrance

2.1.3.4 Top Edge Holder Mechanism Operation ...........2 -13

2.1.4.1

2.1.4.2

2.1.4.3

2.1.4.4

2.1.4.5

2.1.4.6

2.1.4.7

Pump Motor

Pump Mechanism Cap Mechanism Cleaning Mechanism and Carriage Lock

Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ink Cartridge and Ink End Sensor

Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wasted Ink Drain Tank...........................................2.2l

Operational Sequence of Ink Mechanism ........2 -22

.............................................................2.2

...............................................................2.4

..........................................................2.6

Operation.........................................2.8

........................................2.l

.............2 -14

................................................................2.l

.....................................................2.l 6

.........................................................2.l 7

. 2-18

. 2-20

2.1.5 Case Open Interlock

2.2

OPERATING PRINCIPLES OF POWER SUPPLY

2.2.1 Voltage Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 Operating Principles of Power Supply Circuitry ............2 -27

OPERATING PRINCIPLES OF CONTROL CIRCUITRY ...............2 -29

2.3

2.3.1

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

2.3.8

2.3.9

2.3.10

Control Circuitry Overview Reset Circuit Detection Circuit

Paper Feed Motor Drive Circuit ...........................................2-32

Carriage Motor Drive

Printhead Drive Circuit ...........................................................2.34

Pump Motor Drive Circuit TE Motor Drive Circuit

Timer Circuit and Backup Circuit ........................................2.37

EEPROM Control

...............................................................................2 -31

Switch..................................................2.26

CIRCUITRY..2-27

..2-27

...................................m.........mm.mmm.2.29

.......................................................................2.3 1

Circuit.................................................2.33

......................................................2.36

............................................................2.37

Circuit.........................................................2.38

z-i

Page 38

REV.-A

LIST OF FIGURES

Figure 2-1. Block Diagram of Printer Mechanism -Model

-47 10/4760 Figure 2-2. Figure 2-3. Structure of a Nozzle Figure 2-4. Printing Principle (1) Figure 2-5.

Figure 2-6. Figure 2-7. Carriage Mechanism Figure 2-8.

Figure 2-9. Figure 2-10. Push Tractor Operation Figure 2-11. Push-Pull Tractor Method Figure 2-12. Moving the Release Lever Figure 2-13. Arrangement of Gears in Friction Feed

Figure 2-14. Arrangement of Gears in Front Push Tractor Feed.....2-9

Figure 2-15. Arrangement of Gears in Rear Push Tractor Feed ......2-9

Figure 2-16. Top Entrance - Friction Feed Method .............................2-10

Internal Structure of Printhead ..........................................2-2

Printing Principles (2) Printing Principles (3)

Adjustment of Platen Gap Friction Feed Method

(or Full Release)

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

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

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

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

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

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

.............................................................2.6

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

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

....................................................2.8

........................................................................2.9

2-1

2-2 2-3 2-3 2-3

2-5

2-7 2-8

Figure 2-17. Rear Entrance - Push Tractor

Figure 2-18. Rear Entrance - Push-Pull Tractor Method ...................2-l 1

Figure 2-19. Front Entrance - Friction Feed Method Figure 2-20. Front Entrance - Push Tractor Method

Figure 2-21. Front Entrance - Push-Pull Tractor Figure 2-22. Top Edge Holder Mechanism Figure 2-23. Outline Ink Mechanism System Figure 2-24. Pump Motor Figure 2-25. Pump Movement Figure 2-26. Cap Movement Figure 2-27. Air Inlet Operation Figure 2-28. Cleaner Blade Operation

Figure 2-29. Rubbing Block Operation Figure 2-30. Set/Reset of Cleaner Lever Figure 2-31. Carriage Figure 2-32. internal Structure of Ink Cartridge Figure 2-33. Structure of Ink Cartridge Figure 2-34. Structure of Wasted Ink Drain Tank

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

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

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

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

Lock............................................................................2-

Method............................2-l O

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

Method..................2-l 2

...............................................2-l

.........................................2-14

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

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

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

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

Holder......................................2-2l

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

2-11 2-12

2-15

2-16 2-17 2-17 2-18 2-18 2-19

2-20

2-21

. . . . .

z-ii

Page 39

REV.-A

Figure 2-35.

Figure 2-36. Figure 2-37. Figure 2-38. Figure 2-39. Figure 3-40. 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.

Operational Sequence of Ink Mechanism and Carriage Position

Interlock Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply Circuit Block Diagram .................,.............2-28

Control Circuitry Block Diagram ........................................2.29

Reset Circuit Block Diagram Detection Circuit Block Diagram Paper Feed Motor Drive Carriage Motor Drive Circuit Printhead Drive Charge/Discharge Circuit Head Charge Head Discharge Condition

Timing for Discharge/Charge

Block Diagram of Pump Motor Drive Block Diagram of TE Motor Drive

Block Diagram of Timer Circuit/Backup Circuit ..........2-37

.....................................................................2.22

.2-26

...............................................2-3

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

Circuit..........................................2.32

...............................................2.33

Circuit..........................................................2.34

.....................................................2.35

Condition..........................................................2.35

....................................................2.35

Pulse..................................2-36

Circuit.................2-36

Circuit.......................2-37

2-31

Figure 2-51.

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

Table 2-7.

EEPROM Control Circuit

.......................................................2.38

LIST OF TABLES

Paper Feeding Method and Paper Entrance.......................2-6

Rotational Direction and Operation of Each Part ............2 -15

Ink End/Ink Cartridge Signal

Ratings of Power Supply Board..............................................2.27

Voltage Allocation

Major Elements on C076 MAIN Board and

Their Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Carriage Motor Drive Modes ...................................................2.33

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

...................................................2.2O

2-27

...................2 -30

Z.iii

Page 40

REV.-A

2.1 OPERATING PRINCIPLES OF PRINTER MECHANISM

This section describes functions and operations of the printer mechanism - Model-47 10/4760.

Modei-47 10/4760 is a serial type printer mechanism with a 48-nozzle

This printer mechanism consists of the

Figure 2-1 shows the block diagram of the printer mechanism – Model-47 10/4760.

LOCK

Cover Open

PE/FPE/R

MSS S

Paper Feed

Figure 2-1. Block Diagram of Printer Mechanism - Model-471 0/4760

F/T

TE EDGE

TE Holder

printhead

CM EN TH DG HEAD

G=-

unit, paper feed unit, ink mechanism, and sensors.

I .......1 I Ink

t-nnmeau

Cartridge

IE2

printhead.

I I Punp

UnitI . &:y:e:aln[

(Cap, Cleaner)

2-1

Page 41

REV.-A

2.1.1 Printhead Mechanism

The printhead of this printer employs the on-demand method, where part of the ink stored in the reservoir within the Figure 2-2 shows the internal structure of the explained below.

● Head damper

When the carriage moves, the ink tube also moves, which results in the change of pressure within the tube. The head damper is used to absorb this change of pressure and prevent the ink from rushing into the reservoir.

● Reservoir

The ink supplied into the

Nozzle

The ink stored in the reservoir is injected through nozzles. The structure of a

2-3.

printhead

is supplied into the nozzle each time ink in the nozzle chamber is injected.

printhead

printhead.

is once stored in the reservoir.

The functions of the major components are

nozzle

is shown in Figure

‘~~~

Reserver

—

Nozzle

Piezoelectric

Figure 2-2. Internal Structure of Printhead

Element

/<”-

,’/

\-,/’

Ink Inflow Gate

------’.\

,’

— —— —.-

‘

Filter

Diaphragm

Piezoelectric

Element

;

-Damper

2-2

Pressure

Chamber

‘ozzem

Figure 2-3. Structure of a Nozzle

Page 42

< Printing >

This section describes how ink is injected through the nozzles.

REV.-A

(1) Normal condition

(2) Charging operation --When the electric charge of the

---Piezoelectric

the element is bent outward to let ink into the pressure chamber.

Element is electrically charged and bent inward.

Piezoelectric Element

)

Figure 2-4. Printing Principle (1)

Figure 2-5. Printing Principles (2)

(

piezoelectric element is gradually discharged,

Pressure Chamber

(3) Injecting operation --The ink in the pressure chamber is injected when the

is quickly charged and bent inward.

Figure 2-6. Printing Principles (3)

When charging ink or cleaning the pump. When printing, on the other hand, the ink is simultaneously injected and supplied according to the change of volume of the pressure chamber.

This printer is provided with the function to change the ink temperature, because the viscosity of the ink is subject to change depending on the ink temperature.

A thermistor is attached on the carriage to detect the ink temperature. When the ink temperature is

low (i.e. the viscosity is high), the The temperature signal is fed back to the to a proper level.

printhead, the ink in the pressure chamber is vacuumed out by the

printhead

printhead drive voltage is increased, or vice versa.

printhead

drive voltage control circuit to adjust the voltage

drive voltage corresponding to the

piezoelectric element

2-3

Page 43

REV.-A

2.1.2 Carriage Mechanism

The timing belt attached to the base of the carriage is driven by the carriage motor and the pulley. This

makes the carriage (printhead) move along the guide shafts.

A scale made of polyester (DETECTION, PLATE, PTS) is provided along the motion range of the carriage.

The optical linear encoders mounted on the carriage scan this scale and output one pulse of signal each time the carriage moves 1/1 20 inch. The signal consists of Phase-A and Phase-B, which are 90 degrees

different from each other. Therefore, the controller can recognize the moving direction of the carriage

by detecting this difference. The controller can also recognize the carriage speed from the signals sent from the

encoders.These

signals are also used to adjust print timing.

This printer is not provided with a home position sensor.

left stroke end each time the printer is initialized. At this time, the controller resets the carriage position counter to “O” and then counts up/down pulse signals sent from the encoder to determine the carriage position.

Instead, the carriage is designed to hit the

$s2

>:”

Carriage

SHAFT, CR, GUIDE, MAIN

/Timing Belt

Carriage Motor

c’

Figure 2-7. Carriage Mechanism

2-4

Page 44

REV.-A

< Adjustment of Platen Gap >

The platen gap must be adjusted with the head adjust lever (LEVER, GAP, ADJUST) depending on the thickness of paper. When the head adjust lever is operated, it turns the carriage guide shaft (SHAFT, CR, GUIDE, MAIN) and makes the carriage closer/farther to/from the platen. (The shaft has an eccentric cross section.)

LEVER, GAP, ADJUST

L—.

Figure 2-8. Adjustment of Platen Gap

2-5

Page 45

REV.-A

2.1.3 Paper Feed Mechanism

The paper feeding method for this printer is divided into the friction feed method and the tractor feed method. The tractor feed method is further divided into the push tractor method and the push/pull tractor method. (This printer is provided with a standard tractor which performs “’push-type” feeding.

In order to perform “push/pull-type” feeding, you must attach an optional tractor.) Also, this printer is provided with three different paper insertion. The most appropriate paper insertion is to be selected depending on the type of paper or feeding mode. The following table lists each paper feeding method in relation to the paper path.

Table 2-1. Paper Feeding Method and Paper Entrance

Paper Insertion (Paper Path)

Paper Advance Method

Friction Feed Push tractor Feed Push-pull Tractor

Feed

NOTE: Pull Tractor Method cannot be used alone on this printer.

Top Entrance

No No

Rear Entrance

OK OK

Front Entrance

OK OK

2.1.3.1 Paper Feeding Mechanism The details of each paper feed method is described below.

Friction Feed Method The cut sheet paper is held by the platen, paper feed rollers, and paper tension roller. When the paper feed motor (STEPPING MOTOR, PF) is driven, the gears connected to the motor are rotated in the direction of the black arrows and rotate the platen and paper tension roller. The paper held between the platen and paper feed rollers is thus driven in the direction of the white arrows by means of friction feed. You can release the paper by setting the release lever to Full Release position. (The paper feed rollers are pressed against the platen by the springs.) Figure 2-9. shows the friction feed method from the top paper entrance.

. .

.’

/7\Q

/“-

..\

Cut-Sheet Paper

Figure 2-9. Friction Feed Method

2-6

F?ed

Page 46

REV.-A

Push Tractor Method

this method, continuous

of tractor. When the paper

paper is engaged to the tractor by mating the holes of paper to the pins feed motor (STEPPING MOTOR, PF) is driven, the gears connected to the

motor are rotated in the direction of the black arrows and rotate the platen, paper tension roller, and push tractor. The paper is thus driven in the direction of the white arrow as pushed by the push tractor pins and pulled by the paper tension roller. In this method, the release lever must be set to Push Tractor position, where the paper feed rollers are set free from the platen. Figure 2-10 shows the push tractor method from the rear entrance and the

/-’--=..

Platen

/“

.’

c>’’””””’

“P”

Rear Entrance

front entrance.

AZ=/’ --Rear Push

Front Entrance

Front Push

Tractor

Figure 2-10. Push Tractor Operation

‘(u

–’

Pajer

Feed Motor

2-7

Page 47

REV.-A

Push-Pull Tractor Method This method is a combination of the above-mentioned push tractor method and the pull tractor method. The push tractor pushes the paper toward the

printhead. This provides more accuracy in paper feeding operation.

the Figure 2-11 shows the push-pull tractor method from the rear feeding slot.

printhead,

while the pull tractor pulls the paper from

,’

/,/

,,fi

.“

Pull Tractor

Rear Push

Paper Feed

“?

Tractor

Figure 2-11. Push-Pull Tractor Method

2.1.3.2 Release Lever Operation The friction feed method and the tractor feed method can be switched to each other with the release

lever (LEVER, RELEASE, MAIN). When the release lever is set to the Friction Feed position, the paper feed rollers are made to contact the platen. When the lever is set to the Tractor position, on the other hand, the paper feed rollers are set free from the platen. The position of the release lever is detected by the Release Sensor (CONNECTOR SWITCH).

hY?-

Pa~er

“Feed Roller

Fiaure 2-12. Movina

Release Lever

H’aper’uide

Release Sensor

the Release Lever

2-8

Page 48

REV.-A

When the release lever is shifted as described above, the arrangement of the gears is changed accordingly to enable various types of paper feeding operation (such as front push tractor feeding or rear push tractor feeding) or to disable either. Therefore, you can set continuous paper to each push tractor (front and rear) and switch between the

two only by shifting the lever.

Roller

Front

Platen Gear (Platen Drive)

Pinion Gear

GEAR, 34.5

Figure 2-13. Arrangement of Gears in Friction Feed (or Full Release)

Front

Tractor Gear

Figure 2-14. Arrangement of Gears in Front Push

Tractor Feed

Tractor Gear

Right Frame

Figure 2-15. Arrangement of Gears in Rear Push Tractor Feed

2-9

Page 49

REV.-A

2.1.3.3 Paper Insertion entrance

The foIlowing few pages describe the paper feeding method in relation to the paper feeding insertion.

Top Entrance The top entrance is used in the friction feed method. The paper inserted through this entrance is detected by the rear PE sensor (DETECTOR

ASSY., REAR).

PE Sensor

ear

Rollers

u“

Figure 2-16. Top Entrance -

Rear Entrance The rear entrance is used in the tractor feed method (Push tractor method or Push-pull tractor method).

The paper inserted through this entrance is detected by the rear PE sensor (DETECTOR

Paper

Paper Tension . Roller

Friction Feed Method

~ y’

I y

Rear Entrance

‘“’de

ASSY., REAR).

‘“p’at&

.-.

“Jilr

Figure 2-17. Rear Entrance - Push Tractor Method

2-10

Page 50

REV.-A

Paper

Paper Tension Roller

Printhead

Rear PE Sensor

Figure 2-18. Rear Entrance - Push-Pull Tractor Method

Front Entrance The front entrance is used in the friction feed method or the tractor feed method (Push tractor method or Push-pull tractor method). The paper inserted through this entrance is detected by the front PE sensor (DETECTOR, PE, FRONT).

Paper

Paper Tension Roller

Printhead

Roller

Paper Feed Roller

Figure 2-19. Front Entrance - Friction Feed Method

2-11

Page 51

REV.-A

Paper Tension Roller

Printhead

Paper

Front PE Sensor

Figure 2-20. Front Entrance - Push Tractor Method

Paper,

Paper

Tesion

Roller

x-i/

Pnnthead

‘7

~Front

Figure 2-21. Front Entrance - Push-Pull Tractor Method

Push Tractor

Pull Tractor

Front PE Sensor

.,. .

‘ ~

2-12

Page 52

REV.-A

2.1.3.4 Top Edge Holder Mechanism Operation

This mechanism is provided to minimize unprintable area at the top edge of paper. The top edge of

paper fed around the platen is held by the top edge holder plate until the top edge is delivered to the

position where the paper tension roller comes down to hold the paper. In detail, the top edge holder plate catches the top edge of the paper when the paper is initially fed around the platen, and then rotates along with the platen while holding the paper. When the top edge

of paper reaches the position where the paper tension roller comes down to hold the paper, the top edge holder plate is enclosed behind the eject guide plate. The TE (Top Edge) sensor is used to detect whether or not the top edge of paper is at the position to be held by the holder plate. It consists of a photo sensor which emits light toward the paper and detects the reflected light. The top edge holder plate is driven by the TE motor (a stepping motor) (STEPPING MOTOR, TOP EDGE HOLDER).

TOD Edae Holder Plate

Lett

Frame

(

Platen

Figure 2-22. Top Edge Holder Mechanism

,/’--

(

‘-— \

“-’ >TE

“=..-/”

l’-

c’

j\\\ \

\ r!,

/“

~--+ 1;

\’;y------

“=’r-”’L---

)

Motor

r‘: 1

F, ---

1,0

TE Sensor

,C------l -— —

(Printhead)

2-13

Page 53

REV.-A

2.1.4 Ink Mechanism

The ink mechanism consists of the following parts.

Ink cartridge (Ink cartridge holder, Ink end sensor, Ink cartridge sensor)

Pump unit Pump mechanism (Pump motor) Cap mechanism Printhead cleaning mechanism (Cleaner blade, Rubbing blade) Carriage lock mechanism

Wasted ink drain tank

Figure 2-23 shows the system outline of the ink mechanism.

CR Valve

Pnnthead

(iiP

Pump Motor

Wasted

Drain Tank

Ink

,’.,, ,...,

(--)

-.. .,

:..

Figure 2-23. Outline Ink Mechanism System

Ink Tank

(’

2-14

Page 54

2.1.4.1 Pump Motor The pump motor drives through several gears.

REV.-A

the pump, cleaner blade, rubbing blade, and carriage lock lever (set/reset)

Pump Motor

Gear

Cleaner Lever

Rubbing Cleaner

Blade

CR Stopper

Cleaning Blade Drive Gear

Figure

2-24. Pump Motor

Table 2-2. Rotational Direction and Operation of Each Part

Rotational Direction Operation of Each Part

Ccw

Resets the carriage lock.

Pumps ink into the wasted ink drain tank.

Reset the cleaner blade.

Resets the rubbing blade.

Sets the carriage lock.

Resets the pump.

Sets the cleaner blade.

2-15

Page 55

REV.-A

2.1.4.2 Pump Mechanism The pump draws ink from the nozzles of the printhead and sends it to the wasted ink drain tank. This operation is performed to eliminate Figure 2-25 illustrates the operation of the pump. When the pump motor rotates in the wheel pump unit rotate in the direction of the arrow while compressing the ink tube. This makes the ink in the tube move toward the used ink pack. When the pump motor rotates CW, the pulley pumps are shifted inward and detached from the ink tube.

dust./bubbles

within the nozzles.

CCW,

the pulley pumps

@.@+@

Pumping

Wheel

Pulley Pump

(CCW)

Pumping (Pump

No Pumping (Pump

Pumo

Figure 2-25. Pump Movement

motor:CCW)

motor:CW)

No Pumping (CW)

“/’

‘+

2-16

Page 56

REV.-A

2.1.4.3 Cap Mechanism

This mechanism is provided to prevent the nozzles from drying or forming bubbles while they are not

used. In this mode, when the pump is driven with the cap closely contacted to the nozzles, the internal pressure of the capped section becomes lower than that of the in the

printhead

to flow toward the pump through the cap.

printhead

section. This causes the ink

The capping is automatically performed when the carriage hits the left stroke end. At this time, the cap covers the

printhead

nozzles while the slider valve closes the air inlet.

When the carriage moves right ward in this condition, the slider valve is released from the air inlet and

allows the air to enter the capped section, so that the cap can be easily separated from the

Carriage Movement

printhead.

Carriage

Figure 2-26. Cap Movement

Negative Pressure

Air and Wasted Ink

To Wasted

Ink Drain Tank

Carriage Movement

Inl

--w17%

/ $

‘

Figure 2-27. Air Inlet Operation

2-17

Slider

Valve /

popen

—Air

Inlet

Air

Page 57

REV.-A

2.1.4.4 Cleaning Mechanism and Carriage Lock Mechanism The cleaning operation consists of rubbing operation and cleaner blade operation. (The rubbing operation is performed to remove head preserving liquid, ink, or dust which is heavily adhered to the surface of the printhead, while the cleaner blade operation is performed to remove ink or dust lightly stuck to the surface of the printhead.) In the rubbing operation, the ink, etc. adhered to the nozzles is rubbed off when the carriage is repeatedly rubbed against the pad set in the carriage path.

In the cleaner blade operation, the ink, etc. stuck to the nozzles is scraped off when the carriage is

repeatedly passed along the blade set in the carriage path.

The rubbing pad and the cleaner blade are united into a single part. When the carriage moves from

left to right, the cleaner blade operation is performed. Or when the carriage moves from right to left,

the rubbing operation is performed.

Cleaner Lever

Movement

Cleaner

?ent m

Prin;head

Cleaner Lever

Rubbing Blade Side

[Pad)

-Printhead

Blade Side (Rubber)

Figure 2-28. Cleaner Blade Operation

L-

2arriage

Figure 2-29. Rubbing Block Operation

c.’

2-18

Page 58

REV.-A

The pad and blade is attached to the cleaner lever. When the pump motor rotates clockwise, the spur gear (20) is rotated and thus sets the lever forward. When the pump motor rotates counter-clockwise, the cleaner lever is reset. The spur gear will be disengaged from the cleaner lever as soon as the lever is either set or reset.

Cleaner Lever

Printhead

Figure 2-30. Set/Reset of Cleaner Lever

The cleaner lever is also used as a carriage lock lever. When the this lever functions as a

printhead holder and prevents the cap from coming off in a shock.

Figure 2-31. Carriage Lock

printhead is locked in the capped state,

ner Lever

riage Stopper

riage

2-19

Page 59

REV.-A

2.1.4.5 ink Cartridge and Ink End Sensor Mechanism The structure of the ink cartridge is shown in Figure 2-32. The ink cartridge contains an ink pack and an ink end detection plate. The detection pIate gradually sticks out as the ink inside the cartridge runs short. The ink end sensor (DETECTOR

designed to detect this plate.

ASSY., INK) is

Ink End Detection Plate

[

Figure 2-32. Internal Structure of Ink Cartridge

Figure 2-33 shows the structure of the ink cartridge holder. When the ink cartridge is installed, the ink supply needle breaks the ink pack so that the ink inside the pack is supplied. There are two micro switches within the ink cartridge holder - Ink End Sensor (DETECTOR ASSY., INK) and Ink Cartridge Sensor (HOLDER detects the ink end detection plate, while the ink cartridge sensor detects the ink cartridge.

When an ink end condition is detected, the status will not be recognized until another 200 lines are printed. When absence of ink cartridge is detected, however, the ink end signal will be immediately activated with the cartridge signal.

Table 2-3. Ink End/Ink Cartridge Signal

Ink Cartridge Exist/Ink Exist Ink Cartridge Exist/Ink Not Exist

Ink Cartridge Not Exist

Status

Sensor

Close Open Open

ASSY.,

IC Sensor

Open

Ink Pack

INK CARTRIDGE). The ink end sensor

Signal IC Signal

LOW HIGH LOW HIGH

LOW

HIGH

..*:,.

., ..,

(!2

To Printhead

Ink Cartridge Sensor

~Needle

!1 I

Ink

End

Sensor

Figure 2-33. Structure of Ink Cartridge Holder

2-20

Ink Supply

Page 60

REV.-A

2.1.4.6 Wasted Ink Drain Tank Used ink is collected into the wasted ink drain tank. The wasted ink drain tank has the absorber to collect used ink through the tube, and the opening which lets out the vapor from ink. This tank is provided

with a sufficient capacity to collect the waste ink that is used during the whole printer life.

From Pump Wasted Ink

Absorber

Figure 2-34. Structure of Wasted Ink Drain Tank

2-21

Page 61

REV.-A

2.1.4.7 Operational Sequence of Ink Mechanism Ink Mechanism comprises of various steps of operation.

The following are some of the basic steps of operation.

● Ink flushing operation

In this operation, the position) and then ink is injected from all the nozzles toward the cap.

printhead is moved to the position where the cap covers the nozzles (the refresh

● Negative pressure release operation

This operation is performed to change of inside the cap air pressure from negative pressure to normal pressure. In this operation, the carriage is moved to the negative pressure release position, where the

printhead

is closely contacted against the cap with the air valve opened. (The negative pressure inside the cap is thus released.) Then the pump operates for 5 seconds to make the ink inside the cap flow toward

the wasted ink drain tank.

● Cleaner blade operation-1

This operation is performed to remove dust, etc. from the

printhead. Refer to 2.1.4.4 for the details.

● Cleaner blade operation-2

This operation is performed to remove dust, etc. from the It consists of the cleaner blade operation- and 3000-pulse ink flushing operation that follows.

printhead following the ink charge operation.

● Cleaner blade operation-3

This operation is discharge operation and the cleaning blade operation- that follows.

petformed to remove ink mist from the printhead. It consists of the l-second ink

● Rubbing operation

This operation is performed to remove head preserving liquid, ink, or dust which is heavily adhered to the surface of the

The above operations are performed when the carriage is located at the position indicated below.

Left Side

Figure 2-35. Operational Sequence of ink Mechanism and Carriage Position

printhead. Refer to 2.1.4.4 for the details.

Cleaner

Cap

Negative Pressure

-1

Release Area

Carriage

~-,i-,

~-. *

l+ t

;_. ~-->, :-J

‘---x’

Printing Area

‘

Bottom Side

Flushing Area

Platen

h’

I I

Right Side

‘.;;

.=4

2-22

Page 62

REV.-A

The basic steps of operation described above are combined in many ways to meet various conditions

of the printer as described below.

(1) Power ON operation

At time of power on, four different ways of operation are possible depending on the carriage position and timer value.

CL1

They are described in a), b), c), d) below. The timer will be reset in the following cases; the

operation (described below) is performed, the initial charge operation (refer to this section) is performed,

or the timer indicates “7’’days or more when the power is turned on.

a) Carriage Position: Home position

CL2

● Timer Value: Less than 7/days/Less than 24 hours after last printing

The negative pressure release operation and 100-pulse flushing operation will be performed without

performing the cleaning operation. The purpose of this operation is to prevent ink in the nozzles from drying up by keeping the inside of the cap moistened. After this operation, the

will be capped again.

b) Carriage Position: Home position

printhead printhead

● Timer Value: Less than 7 days/More than 24 hours after last printing

The negative pressure release operation, and 2600-pulse flushing operation, 0.5 second waite, and 2600-pulse flushing will be performed without performing the cleaning operation. After this operation,

printhead

the

will be capped again.

c) Carriage Position: Home position

● Timer Value: More than 7 days

The pump performs the ink charge operation for 4 seconds to replace the ink in the tube. This operation

is followed by the negative pressure release operation, cleaner blade operation-2, and capping.

This operation is necessary because the ink kept inside the tube for more than 7 days is subject to

deterioration.

d) Carriage Position: Other than Home position

● Timer Value: Not relevant

The carriage will be moved to the home position followed by the cleaner blade operation-1. Then the pump performs the ink charge operation for 2 seconds, followed by the ink discharge operation, cleaner blade operation-2, and capping.

(2) Cleaning operation

This operation is performed to correct abnormalities such as injection failure (which results in missing

dots or deformed characters). This operation is enabled when the cleaning switch is pressed during the pause mode. Three modes of operation are used depending on the number of lines printed since the last cleaning operation.

2-23

Page 63

REV.-A a)

CL1

(Normal cleaning) This operation consists of cleaner blade operation-2.

CL2

This operation is performed when the cleaning switch is pressed before 200 lines are printed after the

last cleaning operation. In other words, the intensive cleaning is performed when the normal cleaning fails to correct abnormalities. This operation consists of the rubbing operation, ink charge operation for 7 seconds, negative pressure release operation, and cleaner blade operation-2.

The false cleaning will be performed when the user presses the cleaning switch 6 times or more before

500 lines are printed after power on. This prevents the user from consuming an excessive a mount

of ink in performing the cleaning operation for too many times. This operation consists of the cleaner blade operation-1, ink charge operation for 2 seconds with the . slider valve released, negative pressure release operation, and cleaner blade operation-2.

(Intensive cleaning)

CL3

(False cleaning)

the cleaner blade operation-1, negative pressure release operation, and

(3) Refreshing operation

This operation is performed to prevent the ink in the nozzles from getting sticky. Two modes of operation are provided as follows.

a) Refreshing operation-1 This operation is performed every 15 seconds in the continuous printing mode. The carriage is moved to the flushing position and then 10-pulse ink flushing operation will be performed.

b) Refreshing operation-2

This operation is performed after every 100 times of refreshing operation-1. It is followed by the cleaner

blade operation-3.

(4) Waiting operation

This operation is performed when more than 3 seconds has passed after the last character is printed. This operation consists of 2800-pulse ink flushing operation (or less, depending on the number of cleaning operations performed so far), cleaner blade operation-3 (performed in some cases, also

depending on the number of cleaning operations performed so far), and capping.

( ‘

(5) Initial charge operation

This operation is performed to replace the head preserving liquid with ink. It is performed when the user operates the initial charge operation. Three different modes of operation are used depending on the printer conditions.

2-24

+-:.

Page 64

REV.-A

a) Initial charge operation-1

This operation is performed when the charge operation. It consists of the cleaner blade operation-1, ink charge operation for 60 seconds, negative pressure release operation, rubbing operation for 5 times, ink charge operation for 5 seconds, and negative pressure release operation. Then a series of rubbing operation (5 times), ink charge operation (5 seconds), and negative pressure release operation will be repeated 3 times,

followed by the ink charge operation for 5 seconds, negative pressure release operation, and cleaner

blade operation-2.

b) Initial charge operation-2

This operation is performed when the charge operation. It consists of the ink charge operation for 60 seconds, negative pressure release operation, rubbing

operation for 5 times, ink charge operation for 5 seconds, and negative pressure release operation. Then a series of rubbing operation (5 times), ink charge operation (5 seconds), and negative pressure release operation will be repeated 3 times, followed by the ink charge operation for 5 seconds, negative pressure release operation, and cleaner blade operation-2.

c) False initial charge operation

This operation is performed if one of the following conditions occurs when the user operates the initial charge operation.

printhead is not capped at the time the user operates the initial

printhead

is capped at the time the user operates the initial

● The initial charge operation has been performed 6 times or more.

● The initial charge operation has been performed immediately after the previous one.

● The initial charge operation has been performed 4 times or more in one day.

This operation prevents the user from consuming an excessive amount of ink in performing the initial

charge operation for too many times. This operation consists of the ink charge operation for 60 seconds with the slider valve released, pause for 10 seconds, ink charge operation for 5 seconds with the slider valve released, and the negative

pressure release operation. A series of the above operations are repeated 3 times, followed by the ink

charge operation for 5 seconds with the slider valve released, negative pressure release operation, and cleaner blade operation-2.

2-25

Page 65

REV.-A

(6) Wasted ink drain tank replacement operation

In normal use condition, this tank has a sufficient capacity to collect all the ink to be wasted during the whole printer life. However, if an unexpectedly large amount of ink is wasted in excessive cleaning operations or power on operations, the tank may be fulfilled. In this case, the wasted ink drain tank replacement message will be displayed to urge the user to replace the tank. (The tank will be actually replaced by a service personnel as required by the user.)

The tank overflow condition is estimated in the following method; The total time spent for negative pressure release operation is stored in terms of “points”in the non-volatile memory Main Board. If the time exceeds the predetermined value (4 1000 points), the replacement message is displayed. The time spent for ink discharge operation is converted to “point’ ’values at the following

ratio.

(EEPROM)

on the

2 seconds: 4 seconds:

5 seconds: 7 seconds: 60 seconds: 400 points

10 points 23 points 30 points

40 points

2.1.5 Case Open Interlock Switch

The carriage of this printer moves at a high speed, and the printhead is supplied with a high DC voltage. To protect the user from the fast moving carriage and high voltage, the interlock switch is installed on this printer. When the printer cover is opened during the printing operation, the interlock switch is activated and mechanically cuts off the motor by inserting the interlock resistor in series into the carriage motor drive circuit.

printhead

drive voltage to reduce the torque of the carriage

Figure 2-36. Interlock Switch

2-26

‘.4,”-

Page 66

2.2 OPERATING PRINCIPLES OF POWER SUPPLY CIRCUITRY

REV.-A

The power supply circuitry of this printer is provided with

board (220/240 V). Both boards operate in the same way although the elements in the primary circuit are partly different.

The power supply unit supplies DC voltage which is used for controlling the printer of driving the printer

mechanism.

Table 2-4 shows the ratings of the power supply board.

Table 2-4. Ratings of Power Supply Board

Board Name

C076PSB C076PSE

Input Voltage

103.5-132 198-264

either

(ACV)

C076PSB board (120V) or C076PSE

Fuse (F I ) Rating

2.5 A/

1.25 A/ 250 V

125 V

2.2.1 Voltage Allocation

The DC voltage generated by the power supply circuitry is allocated to each circuit or mechanism depending on their voltage level. The details are described in Table 2-5.

Table 2-5. Voltage Allocation

Voltage

+35

VDC

Carriage motor drive

Paper feed motor drive Top edge motor drive Pump motor drive Printhead drive voltage (VH) generation

C076 MAIN board logic circuit Sensors Control panel LED

Top edge motor holding

Application

2.2.2 Operating Principles of Power Supply Circuitry

Figure 2-37 shows the block diagram of the power supply circuitry.

The AC power supplied from the external source is first sent to the filter circuit, where higher harmonic

is cut. The AC voltage is then rectified and smoothed into the DC voltage. This DC voltage is sent to

the switching circuit and then to the smoothing circuit of the secondary circuitry, and thus dropped

VDC

to +35

detection circuit and thus stabilized. The +35VDC voltage is also sent to the

VDC

voltage.

This circuitry is provided with four types of protection circuits as described below.

) + 5

When the current flowing on the + 5 the current. When the voltage of the +

is turned off to stop the generation of +35 included in the over voltage protection circuit.

voltage. This +35

VDC

line over voltage/current protection circuit

VDC

voltage is fed back to the switching circuit by the + 35V line voltage

+5VDC

VDC

5VDC line exceeds a certain value (+ 7V), the switching circuit

power supply circuit and thus dropped to stable +5

line increases, the over current protection circuit cuts

VDC

voltage. The over current protection circuit is

2-27

Page 67

REV.-A

+35

VDC

2) When the voltage of the +35

over voltage protection circuit

VDC

off to stop the generation of +35

35VDC under voltage protection circuit

3) When the voltage of the

+35VDC

off to stop the generation of +35

line exceeds a certain value

(+36V),

the switching circuit is turned

VDC voltage.

line goes lower than a certain value, the switching circuit is turned

VDC voltage.

Power Supply Board

~ --------------------------------------------

I t I

I 1 I

1 I

1 I I I

I I I I I

I I I

I I I I I I I 1

1 I

I I

I I I I I I I I

----

Filter

Clrcult

-------

Primary

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

;

Secondary I

1 !

I I

❑

I I

I I I

I I

1 f

I I

I I I I

I I i I

I 1 I

Smoothing

Circurt

+35

line Detector Circuit

+5 line Voltage Overload Protection

Cirwit

+35 line Voltage Overload

Protection Circuit

+35 line Voltage Drop Protection Circuit

~WT

Circuil

11-

I I

-1

-------

-+-

---

I I

—e

I 1 I

I I

I I I I I

I I I

I 1

+5 Voc

+35VOC

AC Input

Figure 2-37. Power Supply Circuit Block Diagram

Page 68

REV.-A

2.3 OPERATING PRINCIPLES OF CONTROL CIRCUITRY

This section describes the operating principles of the control circuitry of this printer - C076 MAIN board.

2.3.1 Control Circuitry Overview

The C076 MAIN board is provided with

processor,

to control DC motors. Figure 2-38 shows the control circuitry block diagram.

– – - – –

{

Control

, Panel

l–-

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

Parallel l/F

I , – - - - - –,

1“

Option

, l/F

I - – - - –

EEPROM

IC2

I I

I I I

uPD1 6322

IC8,9 IC16

I I I I

I 1 I

l ---------

E05A65 - a gate array with memory management function, and E05A48 – a gate array

---

~ ~

—--—-——7

Case Open

Sensor

--------

E05A65

IC12

I I

SOH03

PU1501

IC18

-------

— - _ --- _--—---—

Figure 2-38. Control Circuitry Block Diagram

C076

wPD70325

MAIN Board

–---------–-

STK

6712B

Icll

(V25 +) (9.5 MHz) – a 16-bit one-chip micro-

--–--–----–- ---------

SLA4391

IC17

Battery

-— —--- —- —— --

Reset Circuit

.__- —-_- — —---—-—-—

I I

I I I I I I I I I I I I 1 I I I

I I I I

I I I I I

I I I I I I I I

2-29

Page 69

REV.-A

Table 2-6 lists the functions of major elements on the C076 MAIN board.

C076

Table 2-6. Major Elements on

Element Location

wPD70325 (V25

E05A65

i05A48

SLA4391

>TK67 12B 50H03 ~PD

16322

t140B03

I M

PS-RAM

IC5

Ic12

Ic17 Ic

11 ICI 6 This IC drives the pump motor (DC motor).

IC8,9

IC4

C19

(IC22)

The CPU of this board. It receives data from the host and stores (V25 +)

‘

it in the input buffer in converted to image data and stored in the image buffer in image data is then transmitted to the gate array, where the image data is converted to the serial data. This processor also controls each printer mechanism and the control panel, and receives signals from each sensor.

This gate array executes the following functions. . Memory management

● 1/0 Port

● Printhead control

. EEPROM control . Parallel interface

.Control panel control

This gate array controls the carriage motor (DC motor) by detecting the

motor speed and carriage position. This IC drives the carriage motor (DC motor). This IC drives the PF motor (Stepping motor).

These are head drivers. The head data is received in serial mode.

These

! in 1

This RAM is used to store CPU’s working memory, input data, and

image data.

ICS

(Mask-ROM) are character generators. The font data is stored

these ROMs.

MAIN Board and Their Functions

Function

PS-RAM

by interrupting. The stored data is then

PS-RAM.

The

2-30

. . ..

,-..

Page 70

2.3.2 Reset Circuit

REV.-A

When the power in turned on, the reset IC(MB3771 ), which monitors the + 5

VDC

RESET signals until +5

pin of

E05A65 gate array) to LOW. The block diagram of this circuit is shown in Figure 2-39.

is stable. This controller can also reset itself by setting

+5V

E05A65

IC12

RSTRG

160 6 8

MB3771 IC21

RESET

VDC

line, keeps outputting

RSTRG

signal(160

Figure 2-39. Reset Circuit Block Diagram

2.3.3 Detection Circuit

This printer is provided with 1 sensors, but only 7 sensors are described in this section. They are Ink

Cartridge Sensor, Ink End Sensor, Platen Gap Sensor, Friction/Tractor Select Sensor, Top Edge Sensor, Paper End Sensor (Front), and Paper End Sensor (Rear). The signals from these sensors are directly inputted to the CPU port.

For the other sensors, refer to each circuit as follows.

●

Ink temperature detector (Thermistor) + 35VDC under voltage detection

●

Case open sensor (interlock switch)

●

Encoder

circuit---EEPROM

---Head drive circuit control circuit

---Head drive circuit /Carriage

---Carriage motor drive circuit

motor drive circuit

IE2

GAP

Ffi

EDGE PE

PE(Rear)

“3

PT7

PT6 V25+ PT5 PT4 PT3 PT2 PT1

CPU

IC5

Figure 3-40. Detection Circuit Block Diagram

2-31

Page 71

REV.-A

2.3.4 Paper Feed Motor Drive Circuit

A stepping motor is used in the paper feed motor drive circuit of this printer. The motor is driven by 2-2 phase excitation and constant-current arrangement. For a single pulse, paper

is fed 1/360 inch (minimum value). The acceleration/deceleration control is not applied to the paper feed rate less than 3 steps. The feeding speed is varied depending on the type of paper, etc.

The constant-current drive circuit is made by of the stepping value. This value can be set at user’s option through the external circuit. The value set by the external circuit is inputted through the port on retaining mode is also included.)

The phase of the paper feed motor is also switched through

~otor, and keeps the current constant by cutting the current that exceeds a certain

STK67 126, which detects the current flowing in the coil

E05A65 and outputted to STK67 126 in 4 steps. (The motor

E05A65.

+3SV

CPU

(IC5)

Bus

E05A65

(IC12)

PAO PA1

PA2

PA3

—

STK6712B

(Icll)

INA

IN/~ A

INB

IN/6 B

VREF

I--H

PD2-O ~.

Figure 2-41. Paper Feed Motor Drive Circuit

PFCOM

PFA

PF~ PFB PFB

2-32

Page 72

REV.-A

2.3.5 Carriage Motor Drive Circuit

This printer uses a DC motor for the carriage drive. To drive the DC motor at a constant speed, the gate

E05A48 monitors the encoder signals and then supplies proper voltage to the motor by turning

array the motor power on/off. The gate array can recognize rotational direction of the motor (i.e. moving direction of the carriage) because there are two encoders attached on the carriage with 90-degree phase difference. The gate array can thus recognize current position of the carriage with reference to the home position. In detail, the position counter in the gate array is reset every time the carriage hits the left

frame, and the counter counts up as the carriage moves rightward. (Home position sensor is not used.)

17 (SLA4391 ) is a DC motor driver. This printer is provided with a case open sensor (interlock

The switch). When the printer cover is opened during printing operation, the printer immediately stops

printing and moves the carriage to the capping position to cap the printhead. Also, when the interlock switch is activated, the interlock resistor is inserted in series into the carriage motor drive circuit to decrease the motor torque. The purpose of this function is to protect users from possible injury they may suffer when they open the case and touches the carriage as the carriage is moving toward the

capping position.

Interlock Register

CYvl+

CM-

I I

CR MOTOR

I I I

ENA

ENB

I I

ENCODER

I I I I

CPU

(IC5)

INTPO

E05A48

(Iclo)

Bus

STOP

PNP1 PNP2 NPN1 NPN2

ENCA

ENCB

4391

(IC17)

Figure 2-42. Carriage Motor Drive Circuit

This printer has four different carriage speeds as listed below.

Table 2-7. Carriage Motor Drive Modes

Mode No.

Carriage

Speed

6.60 KHz

4.80 KHz

2.40

Khz

0.48

KHz

180

360

●

‘1: This speed is used only in Home Position Seek operation.

2-33

Dot Density

DPI DPI

DPI

Page 73

REV.-A

2.3.6 Printhead Drive Circuit

Figure 2-43 shows the

The print data developed by CPU is transferred to the head control gate array bus. The data for 48 nozzles stored in driver signal as soon as the data transmission for 48 nozzles is completed.

The head is controlled by

~PD 1632

printhead

(IC8,9). HDCLK

CHG

and

CPU

(IC5)

drive circuit.

E05A65 is serially transmitted from HDDAT port to the head

is a clock for this serial transmission. The E05A65 transmits

DSCHG

Bus

pulses.

E05A65 (IC12)

ALDCHG

HDSTB

DSCHG

HDCLK

uPDI 6322

(IC6,9)

CHG

STB

—

-=1

—

BLK CLK

---

CHG

STB

BLK CLK

---

+35V

VH supply

Thermistor

circuit

PTS

E05A48 (IC1O)

I-J

Charge

Circuit

E05A65 (ICI 2) via data

HDSTB

I I I

I I i I I I I I

I I I

I I

I i

head

printhead

The voltage supply circuit.

drive circuit can be divided into two circuits:

Figure 2-43. Printhead Drive Circuit

Charge/discharge circuit and

Printhead ““,

(

. .-

. . . . .

2-34

Page 74

(1) Charge/discharge circuit Figure 2-44 shows the

chargeidischarge circuit,

REV.-A

6322

~Mnchage

(IC8,

CHG

ALDCHG

HI-48

DSCHG

R35

AAA

yPDl

Figure 2-44. Charge/Discharge Circuit

< Charge pulse >

When the gate array thus the Vh voltage charges the

(E05A65) outputs HIGH pulse from

piezoelectric

elements

Figure 2-45 shows the head condition at this time.

CHG

port, the transistors (Q3,9) go ON and

(PZD)

through the diode

Piezoelectric Element

DCH

(DCH)

and resistor

(RCH).

Figure 2-45. Head Charge Condition

< Discharge pulse >

The data for 48 nozzles stored in the gate array the printhead drive

KPD

to to inject ink.

16322. The

(PZD

IC (pPD

KPD

is always charged by Vh.) For cleaning operation, the discharges ail the

piezoelectric

16322). Following this, the discharge pulse is transmitted from E05A65

16322 then discharges

E05A65 sends

elements to cause all the nozzles to inject ink.

(E05A65) is serially transmitted from HDDAT port to

PZD

ALDSCHG

Figure 2-46 shows the nozzle in discharge condition.

Figure 2-46. Head Discharge Condition

2-35

according to the print data to cause the nozzles

signal to pPD 16322, which automatically

Page 75

REV.-A

Figure

(2)

2-47

Printhead

shows

the timing

for discharge/charge pulse.

Figure 247. Timing for Discharge/Charge

Voltage Supply Circuit

Pulse

The viscosity of ink is subject to change due to the temperature. If the viscosity is too high, ink injection

becomes difficult. To eliminate this difficulty, the head drive voltage (Vh: the +35

VDC

to 83 -123.7

in this circuit) is controlled based on the ink temperature detected by the thermistor.

That is, the temperature is fed back to the voltage supply circuit and controlled by

Since each

printhead

produced shows slightly different characteristics, this difference must be

neutralized by adjusting the head drive voltage. For this purpose, several

DIC

detecting output voltage) and a

DIC

replaced, adjust the

jumper to connect the

jumper are provided. When the

zener

diodes in proper arrangement.

printhead

VDC voltage boosted

TL494.

zener

diodes (used for

or the MAIN board is

., \

c’

/’

For safety, this circuit is

automatically

disconnected when a case open condition is detected.

2.3.7 Pump Motor Drive Circuit

Figure 2-48 shows the block diagram of the pump motor drive circuit. A DC motor is used to drive the pump. The drive circuit is controlled by the collector-follower bridge -

SOH03

The rotational direction of the motor is controlled through the ports on transmitted from

(IC

16).

PCO,

the motor rotates

CW.

PMCCW

E05A65. If PMCW signal is

signal is transmitted from PC 1, the motor rotates

Ccw.

CPU

uPD70325 (IC5)

Bus

E05A65 (IC12)

Pcl

Pco

SOH03 (IC16)

NPN2B

PNPIB

PM+

PM-

Pump

/ I

[ 1

I 1 I I 1

I I

MOTOR

...

...”5

.’. -

Figure 248. Block Diagram of Pump Motor Drive Circuit

2-36

Page 76

REV.-A

2.3.8 TE Motor Drive Circuit

A stepping motor is used to drive the TE motor. The phase data for the stepping motor is transmitted

from the port on

method. The TE motor is supplied with + 5

switching is controlled through the port

E05A65

to the driver - PU 1501, and controls the stepping motor by constant-voltage

VDC

PD3

on E05A65.

in hold mode, and +35

VDC

in drive

mode. This

PU1501 (IC18)

DRIVER

CIRCUIT

DRIVE

VOLTAGE

CHANGE

I I

-L-I T:OTOR

I I I I

I I

CPU

(IC5)

E05A65

Phase

PAO

Bus

Figure 2-49. Block Diagram of TE Motor Drive Circuit

-PA3

DATA

PD3

2.3.9 Timer Circuit and Backup Circuit

Figure 2-50 shows the block diagram of the timer circuit and the backup circuit. The timer circuit (TC8521 AM on CPU bus) outputs the time data used for the pump unit sequence control. The operation of this circuit is independent of the main power ON/OFF state. The backup circuit is used to back up the timer circuit in the main power OFF state. Since this circuit monitors the + 5

VDC

line, it supplies + 5

VDC

+ 3.3

or less, the power is supplied from the lithium battery.

VDC

as soon as the main power is turned on. When the + 5

VDC

line indicates

CIRCUIT

BAITERY

Figure 2-50. Block

TIMER

TC8521AM

(6E)

BUS

CPU

(IC5)

Diagram of Timer Circuit/Backup Circuit

2-37

Page 77

REV.-A

2.3.10 EEPROM Control Circuit

This printer is provided with an (Paper cut position/Current printed line), wasted ink drain tank replacement counter, etc. when the main

power is OFF. When the main power is ON, the data is stored in the RAM. But the data in the RAM will be erased as soon as the main power is turned off. To maintain the data, this printer monitors +35

VDC

line through PST529C

transfers the data from the RAM to the

The data in

EEPROM

+35VDC

PST529C (IC7)

is read/written by/to E05A65 in serial mode.

EEPROM

(IC7)

and, as soon as the voltage goes lower than +25

CPU

NMI (IC12) (IC5)

Figure 2-51.

to store the data such as panel settings, paper position data

EEPROM.

BUS

RAM

EEPROM

Control Circuit

E05A65

Serial

VDC (approx.),

EEPROM (IC2)

. . .

.., , ;

2-38

(-‘

. . .

Page 78

CHAPTER 3

DISASSEMBLY AND ASSEMBLY

REV.-A

3.1 OVERVIEW

3.1.1 Precautions for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1.2 Tools

3.1.3 Service Check List

3.2 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.1 Housing Removal

3.2.2 Printhead Replacement.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.3 Wasted Ink Drain Tank Replacement

3.2.4 Printer Mechanism Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.5 Circuit Board Removal

3.2.6 HOLDER

3.2.7 Printer Mechanism Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

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

(TANK, INK EJECT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3.2.5.1 MAIN Board Removal

3.2.5.2 POWER SUPPLY Board Removal . . . . . . . . . . . . . . . . . . . . . 3-18

ASSY.,

3.2.7.1 Disassembly of PAPER HOLDING

3.2.7.2 Disassembly of CAP

INK CARTRIDGE Removal ................... 3-1 9

ASSY.

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

ASSY.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

3-1

3-7

3-9

3-10

3-11

3-12

3-14

3-15

3-17

3-20

...... 3-20

3.2.7.3 Disassembly of PUMP

CLEANER ASHY........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.7.4 FRAME, FRONT Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

3.2.7.5 Carriage Motor (DC MOTOR, CR) Removal... 3-24

3.2.7.6 Disassembly of Carriage

3.2.7.7 STEPPING MOTOR, PF Removal . . . . . . . . . . . . . . . . . . . . . . 3-27

3.2.7.8 STEPPING MOTOR, TOP EDGE HOLDER

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.7.9 Disassembly of

3.2.7.10 Disassembly of

3.2.7.11 Disassembly of

3.2.7.12 Disassembly of

PLATEN ASHY. . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

PAPER GUIDE FRAME

TRACTOR ASHY. . . . . . . . . . . . . . . . . . . . . . 3-35

ASSY.

ASSY.,

and

3-22

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

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

RIGHT . . . . . . . . . . . 3-33

3-25

... 3-27

3-31

S.i

Page 79

REV.-A

LIST OF FIGURES

Figure 3-1. How to Make a False Ink Cartridge

Figure 3-2. Releasing Carriage Lock

Figure 3-3. Figure 3-4. Fastening Tube Set Screw Figure 3-5. Removal/Disassembly Flow Chart

Figure 3-6. Figure 3-7. Housing Removal (2) Figure 3-8. Housing Removal (3) Figure 3-9. Printer Head Replacement Figure 3-10. Setting PIN, ADJUST Direction

Figure 3-11. Setting PRESSING PLATE, COVER SPRING,

Figure 3-12. Attaching Wasted Ink Drain Tank

Figure 3-13. Removing SHIELD PLATE, I/F.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-14. TUBE, SUPPLY, INK Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-15. Printer Mechanism Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-16. MAIN Board Removal

Setting Shockproof Attachments

Housing Removal (1)

UPPER

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

3-2 3-3 3-5 3-7 3-10 3-11 3-11 3-12

3-12 3-13

3-13 3-14

3-15

. 3-16

3-17

Figure 3-17. POWER SUPPLY Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-18. HOLDER ASSY., INK CARTRIDGE Removal ................ 3-19

Figure 3-19. Assembling TORSION SPRING, 3490 and

COVER, HOLDER, INK CARTRIDGE

Figure 3-20. Disassembly of PAPER HOLDING ASHY........... . . . . . . . . . . . . 3-20

Figure 3-21. Disassembly of CAP ASHY........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-22. Disassembly of PUMP ASSY. and CLEANER Figure 3-23. FRAME, FRONT Removal

Figure 3-24. Carriage Motor (DC MOTOR, CR) Removal . . . . . . . . . . . . . . . . . . 3-24

Figure 3-25. Disassembly of Carriage (1) Figure 3-26. Disassembly of Carriage (2) Figure 3-27. Engaging Timing Belt

Figure 3-28. STEPPING MOTOR, PF Removal Figure 3-29. STEPPING MOTOR, TOP EDGE HOLDER Removal . . . 3-27 Figure 3-30. Disassembly of PLATEN Figure 3-31. Disassembly of PLATEN Figure 3-32. Aligning HOLDER, PLATEN

Figure 3-33. Disassembly of PAPER GUIDE (1) Figure 3-34. Disassembly of PAPER GUIDE (2) Figure 3-35. Direction of SHAFT, RELEASE

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

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

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

ASSY. (1) ASSY. (2)

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

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

ASSY.

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

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

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

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

3-19

3-21

3-22

3-23

3-25

3-25 3-26 3-27

3-28 3-29 3-29

3-31 3-31 3-32

“., ,j

c’

‘,,.-.

s-ii

Page 80

REV.-A

Figure 3-36. Figure 3-37. Figure 3-38. Figure 3-39.

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

Disassembly of Frame Assembly, RIGHT . . . . . . . . . . . . . . . . . . . . . . 3-33

Setting Release Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disassembly of Tractor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35

Tractor Set Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-34

3-35

LIST OF TABLES

Ink Handling Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Tools

instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Abbreviations List of

Form and Abbreviated Part Name of Screw . . . . . . . . . . . . . . . . . . . . 3-8

Service Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connector Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Small

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

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

3-2

...... 3-6

3-7

3-9

. 3-16

S.iii

Page 81

REV.-A

3.1 OVERVIEW

This section describes the various points to note when disassembling, assembling and transporting the printer.

3.1.1 Precautions for Disassembling the Printer

Follow the precautions below when disassembling the printer.

WARNING

Disconnect the power cable before disassembling/assembling/adjusting the printer.

●

● Wear glasses to protect your eyes against ink. If your eyes or any injured part of body get ink,

wash it away with fresh water and see the doctor immediately.

● A lithium battery is installed on the main board of the printer. Be sure to observe the following

instructions in servicing the printer or in storing the service parts. a. Keep the battery away from any metal or other batteries so that the electrodes of opposite

polarity may not contact each other. Otherwise, the battery may burn or lode from the tremendous heat generated inside.

b. Do not heat the battery. Do not put it in fire.

c. Do not solder on any part of the battery except terminals.

(Doing so may result in leakage, burning, or explosion. The leakage may affect other devices mounted close to the battery.)

d. Do not charge the battery. (An explosive gas may be generated inside, and causes burning or

explosion.)

e. Do not disassemble nor distort the battery. (The gas inside the battery may hurt your throat.

Leakage, burning, or explosion may also result.)

f. Do not mount the battery in the wrong direction. (It may result in burning or explosion.)

CAUTION

When repairing the printer, be sure to empty the ink inside the ink cartridge or used ink pack in order to protect yourself against ink or to keep the printer clean. Inform users on every occasion of the appropriate ways to transport the printer. Use only recommended tools. We do not compensate for the damage of the printer resulted from using improper tools.

Apply lubricants\adhesives as specified. (See Chapter 6.)

Make adjustments as specified. (See Chapter 4.)

● Never fail to read the details of precautions described below.

‘ANGER

Danger of explosion if battery is incorrectly replaced. Replace only with same or equivalent type recommended by SEIKO EPSON Co.. Discard used batteries according to government’s safety instruction.

3-1

Page 82

REV.-A Since this printer employs the ink mechanism, it requires special handling as follows.

(1) Ink handling before/after repair The ink path of the ink-jet printer is filled with ink for the whole operating period. Because of this, it is necessary to take the following steps before/after repair.

Table 3-1. Ink Handling Steps

Condition

Trouble expected Countermeasures

When replacing printer mechanism, head, or pump.

When returning the printer to the user.

Ink leakage Cap the

Discharge all the ink.

Ink leakage (caused by shock or vibration)

Clogging of nozzles

(caused by long left ink)

Cap the

Fill preservation liquid. Cap the

printhead.

NOTE: The “long left ink’” refers to any ink expected to be left unused for more than a week due to

transportation or storage. If you are sure the user is going to use the printer within a week, you

can deliver the printer with ink charged.

Ink discharge operation> You can discharge all the ink in the mechanism by performing the cleaning operation for about 10 times with the false ink cartridge set in the ink cartridge holder. (In this operation, you have to turn off the printer power after every 2nd cleaning step, because pressing the cleaning button for the 2nd time only results in a false cleaning step if the power remains on. This mechanism is provided to prevent excessive ink consumption.) Note that excessively frequent ink discharge operation shortens the life of wasted ink drain tank.

NOTE: You must prepare the “false ink cartridge” for yourself. You can easily change over an ink

cartridge as shown below.

=.,)

‘“

(1) Open the ink cartridge case.

Figure 3-1.

(2) Take out the ink pack.

(3) Close the case.

How to Make a False Ink Cartridge

3-2

----

.?!

,,y

c.)

Page 83

Filling preservation liquid>

If it seems to take more than a week before the user receives the

preservation liquid. You can fill the liquid in the following procedure: [Step [Step 2]

ISteo

[Step 4]

[Step 5]

[Step 6]

[Step 7] [Step 8] [Step 9]

Set the false ink cartridge on the ink cartridge holder. Insert the preservation liquid charge identity ROM module (TRANSPORTATION LIQUID FILL UP PROGRAM CARTRIDGE #F588) into the ROM cartridge slot.

Power ON. The BIN 1 LED on control panel brink, and printer discharge ink for printer mechanism ink path.

When the MICRO FEED LED blink, change the false ink cartridge to the preservation liquid

cartridge (TRANSPORTATION LIQUID CARTRIDGE #F587) on the ink cartridge holder.

Push the FORM FEED switch. The BIN 2 LED brink, and printer charge preservation liquid to

printhead.

When the MICRO FEED LED blink, change the preservation liquid cartridge to false ink cartridge. Push the FORM FEED switch. The TEAR OFF LED blink.

When the MICRO FEED LED blink, push the FORM FEED switch. When all LEDs on the control panel, power off.

printer, fill the

REV.-A

printhead with

Ink charge (initial charge)>

“Ink charge” refers to filling the ink path with ink. You can execute the ink charge by turning

power while holding down the cleaning switch. The PAUSE button blinks during the operation, which takes 3 or 4 minutes. This operation can only be performed up to 6 times so that ink consumption may be minimized. Any “ink charge” operations that follow will result in “false ink charge” operation.

Head capping and carriage moving>

When returning the printer to the user, make sure the head is capped. Failing to do so may result in

nozzle clogging or ink leakage.

Also, you must lock the carriage with the cleaning lever after capping the head. When moving the

carriage with your hands, turn the SPUR GEAR (20) with your fingers to make the lever draw back. If

you want to cap the head manually, you must lock the carriage with the cleaning lever in a different

manner. That is, turn the spur gear with your fingers to make the lever stick out.

on the

Figure 3-2. Releasing Carriage Lock

3-3

RIAGE LOCK

Page 84

REV.-A

(2) Wasted Ink Drain Tank This printer is provided with the wasted ink drain tank, which is designed to have a sufficient capacity

to collect the waste ink that is used during the whole printer life. However, it must be replaced in the

following conditions.

● The “OVERFLOW” message is displayed. (All the LEDs on the panel turn blinking and no print data

will be accepted.)

● The value of ‘“Wasted Ink Drain Tank Replacement Counter” exceeds the following

number of years the printer is used]. The value will be printed out under the name of ROM version, if you perform “Self test”. (e.g. The printer used for 2 years indicates the value “10,000”.)

value;[5,000

● If the counter value cannot be printed out due to malfunction of the printer, weigh the tank and replace

it if it exceeds 240g.

If you have replaced the tank, reset the counter in the following procedure: (1) Turn the power on while holding down RESET and MICRO FEED switches. (2) Press LF switch. (3) Press FF switch. (4) The printer sounds the buzzer 3 times after resetting the counter. (4) The PAUSE lamp blinks. Following the procedure described above, be sure to adjust PRINTING POSITION setting which has also been reset.

‘;/

3-4

Page 85

(3) Transportation

Make sure the following preparations are properly made before delivering the printer.

● Capping

● Removing ink cartridge

● Setting shockproof attachments

● Packaging

REV.-A

Protective Sheet

Packing Material

Figure 3-3. Setting Shockproof Attachments

3-5

Page 86

REV.-A

The procedures (1) (2) (3) described above are listed in Table 3-2. (Also refer to Table 3-7)

Table 3-2. Service Process

Procedure

Capping

2 Ink discharge Remove

3 Repair 4 Self test 5 On-line test 6 Filling preservation Fill the ink path Preservation liquid

liquid

7 Capping

8 Packaging

(4) Maintenance

Perform lubricating, adhering, and cleaning according to Chapter 6

bling/assembling

and/or adjustment.

Description Cartridge used Remarks

Cap the head

all the ink

in the ink path about 10 times

Check Check

with the liquid cartridge Cap the head Set shockproof

attachments

None

False ink cartridge

Ink cartridge Test Print

Ink cartridge

Power on/off or manually

Perform cleaning

On-line Print Refer to Page 3-3

Power on/off

‘“Maintenance” after disassem-

●

, . .

c’

(5) Adjustment

Make adjustment

replacement.

according to Chapter 4 “Adjustment” after disassembling/assembling and/or

-.,

3-6

g-:;

Page 87

REV.-A

3.1.2 TOOIS

Table 3-3 and 3-4 list the recommended tools and instruments used for disassembling/assembling,

adjusting, or measuring purposes. Be sure to use a proper tool for each step or operation, especially when servicing the ink tube in the pump unit. As shown in Figure 3-4, you must use a specified torque wrench to tighten the tube set screw. If tightened to an excessive degree, the O-ring may break or crack to cause ink leakage. Also make sure the tube is inserted to the end before tightening the tube set screw.

Tube Set Screw

Insert the tube fully. 2. Set the O-ring.

Figure 3-4. Fastening Tube Set Screw

Table 3-3. Tools

Tool

3. Tighten the tube set screw.

Availability Part No.

Round-nose pliers Nippers

Tweezers

Soldering iron

E-ring holder #2.5 E-ring holder #3 E-ring holder #4 E-ring holder #6 Phillips screwdriver No. 2

Normal screwdriver Box driver (7 mm across) Tension gauge (3,000 g) Torque wrench (6mm X 1 Kg) Transportation liquid cartridge Transportation liquid fill up program cartridge Thickness gauge (1 .00 mm) #F590 Dummy register #F591 Dial gauge #F603 Dial gauge base

XE589

#F587

#F588

Note: o = market purchase, E = exclusive tool of EPSON

Table 3-4. Instruments

Designation

Specification

o o o o

o o o o 0 o

o o

E E E E E

o E

B740400 100

B740500 100

B74 1000100

B740200 100

B740800400

B740800500 B740800600 B740800800

B743800200 B743000 100

B74

1700200 B747700200 B765 106901 S02001 9 C820 180

1011019 1011020 1011974

1011018

Oscilloscope Multi meter

20 MHz

3-7

Page 88

REV.-A

Screw designation>

Ail small parts, such as screws and

Table 3-5. Abbreviations List of Small Parts

Abbreviation

C.P.S. Screw

C.B.

B. Screw

C.C.U. Screw

C. B.

S-tite Screw Cross-recessed Bind-head S-tight screw

C.B. Screw

C. P.

B-tite Screw Cross-recessed Pan-head B-tight screw

C.B.S. Screw

C.B.P. Screw

C.C. Screw

C. P. S. (P) Screw

Table 3-6. Form and Abbreviated Part Name of Screw

Heed

washers, are indicated

Cross-recessed Pan-head S-tight screw Cross-recessed Bind-head B-tight screw Cross-recessed Cup-head Uska screw

Cross-recessed Bind-head screw

Cross-recessed Bind-head S-tight screw Cross-recessed with Plain washer screw Cross-recessed Cup-head screw Cross-recessed Pan-head

by abbreviations.

Part Name

S-tight with

Body

washer

plain

washer screw

bled)

Top

1.~ross–recessed

!.~lotted

head

—.

1.Bind

2.~an

3.gup

Iruss

Side

(with

~ 1 ~

---

~—

(1=

Notch)

.~ormal

~-tight

,! ,,, ~ ~,: ,,,

‘:”:! \

“

‘&;

4.~appin9

\,,’ ,j,:, ,:,1,

Jf!f!!m

1.~lain

washer

(Q)@

2.@tside

3.~pring washer

toothed

lock washer

3-8

Page 89

3.1.3 Service Check List

After servicing, be sure to check the printer for any abnormality using the following list.

Table 3-7. Service Check List

Epson SQ - 1170, SQ - 870 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

REVISION SHEET

TABLE OF CONTENTS

GENERAL DESCRIPTION

1.2 SPECIFICATIONS

OPERATION PRINCIPLES

DISASSEMBLY AND ASSEMBLY