EPSON TERMINAL PRINTER

SQ - 870/1170

4 0 0 1 2 2 5

REV.-A

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.

@ Copyright 1992 by SEIKO EPSON CORPORATION

Nagano, Japan

-io

REV.-A

PRECAUTIONS

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

DANGER

WARNING

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.

Signals a precaution which, if ignored, could result in damage to equipment.

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

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND THE

H O S T C O M P U T E R B E F O R E P E R F O R M I N G A N Y M A I N T E N A N C E O R R E P A I R

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.

W A R N I N G

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 PROD-

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

SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE 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 KP CHIPS AND CIRCUITRY, USE STATIC

DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESS-

ING 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.

- ii –

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the SQ-870/l 170.

The instructions and procedures included herein are intended for the experienced repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:

C h a p t e r 1 Provides a general product overview, lists specifications, and illustrates the main components of the printer.

C h a p t e r 2 Describes the theory of printer operation.

C h a p t e r 3 Includes a step-by-step guide for product disassembly and assembly.

C h a p t e r 4 Includes a step-by-step guide for adjustment.

C h a p t e r 5 Provides Epson-approved techniques for troubleshooting.

C h a p t e r 6 Describes preventive maintenance techniques.

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

REV.-A

– iv -

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L

REVISON

A

REVISION SHEET

DATE ISSUED

Feb. 21, 1992

CHANGE DOCUMENT

1st issue e,:.;-. ,..,,.

-v-

TABLE OF CONTENTS

CHAPTER 1.

CHAPTER 2.

CHAPTER 3.

CHAPTER 4.

CHAPTER 5.

CHAPTER 6.

A P P E N D I X

G E N E R A L D E S C R I P T I O N

O P E R A T I N G P R I N C I P L E S

D I S A S S E M B L Y A N D A S S E M B L Y

A D J U S T M E N T S

T R O U B L E S H O O T I N G

M A I N T E N A N C E

REV.-A

vi –

CHAPTER 1

GENERAL DESCRIPTION

1.1

1.2

FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.3

INTERFACE Overflew....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..1-14

1.4

1.5

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

1.6

1.6.1

1.6.2

1.6.3

1.6.4

Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

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

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..............1 -20

1.6.5

1.6.6

1.6.7

1.6.8

Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .........1 -22

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

1.6.9

1.6.10 Adjust Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

REV

1.7

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

MAIN COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

1.7.1 C076 MAIN Board (Main Control Circuit Board) ............l-26

1.7.2 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......1 -27

1.7.3 C076 PSB/PSE Board (Power Supply Circuit Board) ....l-27

1.7.4 Printer Mechanism (M.471 O/476 O).....................................l.28

I.i

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LIST OF FIGURES

Figure 1-1.

Exterior View of the SQ-1 170 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-2.

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

Figure 1-3.

Release Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-5.

Printable Area for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-6.

Printable Area for Continuous Papers. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

Figure 1-7.

Printer Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-8.

Character Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-9.

Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-15. C076 PSB/PSE Board ...........................................................l -27

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

LIST OF TABLES

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 f.

Table 1-12.

Table 1-13.

Table 1-14.

Table 1-15.

Table 1-16.

Specifications for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Specifications for Continuous Papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Printing (Text Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1o

Character Matrix and Character Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12

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

Settings for DIP Switch 1 (sw1)................................-.....1-18

International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

I i i

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REV.-A

1.1 FEATURES

The SQ-870/l 170 is a high speed 48-nozzle ink jet printer which provides advanced paper handling that is upper compatible with the TSQ-4800. The printer’s main features are as follows:

●

●

●

●

●

●

●

●

●

●

Use of ESC/P 2 control codes

Ability to print multi-point fonts

Ability to receive and print raster graphic images

Compatibility with the LQ\SQ series available on the market

Printing speeds:

660 cps (draft, 12 cpi)

5 5 0 cps (draft, 10 cpi)

2 4 0 cps (LQ, 12 cpi)

2 0 0 cps (LQ, 10 cpi)

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 (CSF) bin

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 CSF

Standard tractor unit can be attached in two positions (front/rear)

Cut Sheet

Two ways to insert cut sheets (front/top)

Auto loading

The SQ-870/l 170 is equipped with the standard EPSON 8-bit parallel interface and various interface 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 SQ-870/l 170, and Figure 1-1 shows an exterior view of the SQ-870/l 170

Model

C82305

C82306

C82307

C82308

C82310

C82313

Table 1-1. Interface Options

Descriptions

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

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

1-1

REV.-A

1

Model

I C80647

C80648

Table 1-2. Optional Units

Descriptions

/ Single-bin cut-sheet feeder (80 columns]

Single-bin cut-sheet feeder (136 columns)

C80637

C80024

SO2OO1O

Second bin hopper (80 columns)

IC80640 I S e c o n d binhopper(136 c o l u m n s )

C80023 Tractor unit (80 columns)

Tractor unit (136 columns)

Ink cartridge

I

I

I

J

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

1-2 e.

REV.-A

1.2 SPECIFICATIONS

This section provides specifications for the SQ-870/l 170 printer.

1.2.1

Hardware Specifications

Printing method

Nozzle configuration

On-demand type ink jet system

48 nozzles (48 X 1 diagonal) m

~

1

‘g

* i h s

Al ~1

\A2

‘ 2 A 3

~

(7.125°)

3

*

1/45”

47/45”

●

Figure 1-2. Nozzle Configuration h

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 — Front or top side

Tractor feed — Front or rear side

Friction without CSF 45 msec (1/6-inch feed)

Friction with CSF

Tractor

4.5 inches per second (ips) (continuous)

49 msec (1/6-inch feed)

4.0 ips (continuous)

45 msec (1/6-inch feed)

4.5 ips (continuous)

NOTE: Following are the precautions for handling paper.

●

●

1

●

●

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.

●

●

2

●

●

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

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 betvveen the tractor holes.

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

●

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

Rear Push Position

\

Release Position

Figure 1-3. Release Lever Positions

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

Width

Length

Thickness

Weight

Quality

Table 1-3. Specifications for Cut Sheets

182 mrn to 257 mm (7.2 in. to 10.1 in.) (80 columns)

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.)

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

14 lb to 22 lb (52.3 g/m2 to 82 g/m2)

Standard paper (photocopier paper, etc.)

Width

Quality

Thickness

Weight

Table 1-4. Specifications for Continuous Papers

I

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

I 101 mm to 406 mm (4.0 in. to 16.0 in.) (136 columns]

Stan jard paper

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

14 lb to 22 lb (52.3 g/m2 to 82 g/m2)

1-4

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REV.-A

Size

Thickness

Table 1-5. EnveIo~es

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

No. 10240 mm X 104 mm (9.5 in. X 4.125 in.)

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 g/m2 to 91 g/m2)

Bond paper, standard paper, airmail

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

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.

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

AVERY MINI-LINE LABELS

36.5mm

(1 .44inch)

r’

23.8mm

F;;::~?nch)-

‘

(0.94inch)

L

Figure 1-4 Label Size

1-5

REV.-A

Printable area See figures 1-5 and 1-6

182-257mm ~.2-10.lind?) : 60cdm

=

●

k~

0

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

101 -254mm (4-10inch) : 60 columns

101 -406mm [4-16inch) : 136 columns b

Printable area

● 1 max. 203mm (6. Oinch) : 60 columns

345mm (13.6inch): 136 columns

I

Printable area

4-

9mm or more

(0.35inch)

?

-f-

Printable r

9mm or more :

(0.35inch) o o o

0

0

0

0

0 o o

ABC

:

0

0

0

0

0

0

0

L

- - - - - - - - - - - - - - - - o r

-

1

1

:

o

0

0

0

0

0

0

0

0

0

0

0

0

XYzo

0

●

-

* c

>$’

. ..,

● 1: 80 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.

136 columns:

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

@’

Ink cartridge

REV.-A

Type:

Color:

Exclusive ink cartridge

Black

Ink capacity: 105 to 115 cc

Print capacity (depending on the cleaning operation):

Draft: 6 million characters

Letter Quality: 3 million characters

Ink life: 2 years from production date

Storage temperature:

–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))

Dimension of cartridge:

24.8 mm (W) X 138 mm (D) X 99.3 mm (H)

(0.98 inch X 5.43 inch X 3.91 inch)

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 printhead

Mean cycles between failures (MCBF) 5 million lines (excluding printhead)

Mean time between failures (MTBF) 4000 power on hours (POH) (25% duty)(SQ-870)

6000 power on hours (POH)

(25’%.

duty)(SQ-1 170)

4000 million dots/nozzle

Safety approvals Safety standardsULl 950 with D3 (U. Aversion)

CSA22.2#220

EN 60950 (TUV) (European version)

Radio frequency interference (RFI) FCC class B (U. Aversion)

VDE0871 (self-certification) (European

Electrical specifications 120 V version Rated voltage

Input voltage range version)

120 VAC

103.5 to 132 VAC

Rated frequency range 50 to 60 Hz

49.5 to 60.5 Hz Input frequency range

Rated current

Power consumption

0.6 A

Approx. 30 W (SQ-870)

Approx. 30 W (SQ-1 1 7 0 )

Insulation resistance

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

10 Megohms minimum (at 500 VDC between AC line and chassis).

1-7

REV.-A

Environmental conditions

2 2 0 / 2 4 0 version

Temperature

Humidity

Dielectric strength

Rated voltage

Input voltage range

Rated frequency range

Input frequency range

Rated current

Power consumption

Insulation resistance

Dielectric Strength

1 0 0 0 VAC rms 1 minute or 1200

VAC rms 1 second (between AC line and chassis)

220 to 240 VAC

198 to 264 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)

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

10 Megohms minimum (at 500 VDC between AC line and chassis).

1 2 5 0 VAC rms 1 minute or 1500

VAC rms 1 second (between AC line and chassis)

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

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

20 to 80 % RH - operating

5 to 85 % RH - storage

NOTE: Figure 1-5 shows the operating environment.

.,.-:. ,

I

Temperature (“c)

Figure 1-7. Printer Operating Environment

Resistance to shock

1 G, within 1 ms - operating

2 G, within 1 ms - storage

Resistance to 0.25 G, 55 Hz, max - operating vibration 0.50 G, 55 Hz, max - storage

Physical specifications Weight 9.5 Kg, approx. (2 1.0 pounds, approx.) (SQ-870)

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

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

1 8 . 2 in(width) X 12.8 in(depth) X 8.1 in(height) (SQ-870)

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

2 5 . 9 in(width) X 12.8 in(depth) X 8.1 in(height) (SQ-1 1 7 0 )

1-8

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1.2.2 Firmware Specifications

Control code

Printing direction

Input data buffer

Character code

Character tables

Bit-map fonts

Scalable fonts

ES C/PTM level 2 (EPSON standard code for printers)

Bi-directional with logic seeking (text printing)

Uni-directional (bit-image printing)

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 personal computer)

Fonts and pitches

See table 1-7

EPSON Roman

EPSON Saris-serif

8 pt to 32 pt

8 pt to 32 pt

I

EPSON Roman

EPSON Saris-serif

EPSON Courier

EPSON Prestige

EPSON Script

EPSON Script-C

EPSON Orator

EPSON Orator-S

EPSON DRAFT

Table 1-7.

Built in Bit-ma~ Fonts

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

9

7

8

1

2

3

4

..-

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

“

0

.

0

0

0

0

0

0 x

0 x

0

0

●

●

●

●

.

.

xx

0-- R e s i d e n t

, --

Desired pitch is made by software using selected font x -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 cpi 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

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REV.-A

Printing speed

Printing columns

Character matrix

Character size

CPI:

CPS:

LQ:

Print

Pitch

10

12

15

Condensed

0

0

0

0

1

0

0

1

0

0

1

1

0

1

0

0

0

characters per inch characters per second letter quality

See Tables 1-8 and 1-9.

See Table 1-8.

See Table 1-10.

See Table 1-10.

x

1

0

0

1

0

0

1

1 x x

1

1

0

0 x x

Emphasized

Table 1-8. Printing (Text Mode)

Double width

Printable

Columns

80 COi.

1 3 6 Col.

Charactar

Pitch

(cpi)

0

1

0

1 x

0

1

0

1 o o

1

0

1

0

1

1

80

40

80

40

137

68

96

48

96

48

160

80

120

60

120

60

Printing Speed

(Cps)

136

68

136

68

233

116

163

81

163

81

272

136

204

102

204

102

10

6

5

10

5

17.1

8.5

12

6

12

20

10

15

7.5

15

7.5

,

Cannot be condensed

Draft

550

275

400

200

684

342

660

330

480

240

800

400

825

412

600

300

LQ

200

100

200

100

342

171

240

120

240

120

400

200

300

150

300

150 e;,?

,<..

(’J ~

1-1o

DPI:

IPS:

Pins

8

24

48 m

32

33

38

39

40

71

72

73

1

0

2

3

4

6

90

180

360

180

360

360

Dot

Density

(DPI)

60

Table 1-9. Printing (Bit Image Mode)

Adjacent

Dot

Printing

Yes

256 X n2 + nl

80 Columns

480

136 Columns

816

120

120

240

80

Yes

No

No

Yes

960

960

1920

640

1632

1632

3264

1088

90 Yes 720 1224

816 6 0

120

Yes

Yes

480

960 1632

720

1440

Yes

Yes

No

Yes

No

Yes

2880

1440

2880

2880

1224

2448

4896

2448

4896

4896 dots per inch inches per second

REV.-A

55

20

20

55

55

20

20

20

20

Printing

Speed

(IPS)

55

20

20

20

20

1-11

REV.-A

Printing Mode

; Draft, 10 pitch

Draft, 12 pitch

Draft, 15 pitch

Draft, 17 pitch

Draft, 20 pitch

LQ, 10 pitch

LQ, 12 pitch

LQ, 15 pitch

LQ, 17 pitch

LQ, 20 pitch

LQ, proportional

LQ, proportional, super/subscript

Table 1-10. Character Matrix and Character Size

Face Matrix HOD Character Size

15 x 44

13 x 44

180

180

2.1 x 3.1

1.s

X

3 . 1

11 X 32 180 1.6 X 2.3

3 6 0 15 x 44

13 x 44

31 x 22

27 X 22

22 X 16

16 X 44

14 x 44

Max. 37 X 44

Min. 18 X 44

Max. 28 X 32

Min. 12 X 32

3 6 0

3 6 0

3 6 0

3 6 0

3 6 0

3 6 0

3 6 0

3 6 0

3 6 0

3 6 0

1.1 x 3.1

0.9 x 3.1

2.2 x 3.1

1.9 x 3.1

1.6 X 2.3

1.1 x 3.1

1.0 x 3.1

2.6 X 3.1

1.() x 3.1

1.8 X 2.3

0.7 X 2.3

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 CHR$(&h20)), indicates the minimum length to be added to the right of the character specified in the ESC

SP control code.

Unit ESC sp

120

120

180

180

180

180

120

120

120

180

180

,

180

*

@

1-12

..; ,

@

(Normal character)

5

6

7

1~

2

Ascender area

3

4

R

.

k

F k

/ T /

/s/

/y/

// s

.

.

: c

39 E

: c

E

40

41

.

.

(aO)

(a2)

Descender area 46

47

48

L

L

Character width (CW)

4

17

18

1:

.

.

.

(Sub-script character)

From dot No. 1 to 16 are not

,.

45

46

47

48

.

.

.

(Super-script character)

From dot No. 33 to 48 are not

;

3

4

.

.

L

.

.

29

30

31

32

Figure 1-8. Character Matrix

REV.-A

1-13

REV.-A

1.3 INTERFACE OVERVIEW

The printer has a parallel interface with the specifications described below.

1.3.1

Parallel Interface

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

Data format

Synchronization

Handshaking

Signal level

Adaptable connector

Data transmission timing

[

8-bit parallel

STROBE signal

BUSY and ACKNLG signal

ITL-compatible

57-30360 (Amphenol) or equivalent

See Figure 1-9.

4

It

, /

//

BUSY

ACKNLG

DATA

STROBE o.5#s o.5/.ls

o.5/ls min.

min.

min.

511s

WP

Figure 1-9. Data Transmission Timing

5ps typ. ‘

8

9

6

7

4

5

2

3

10

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

Pin

No.

1

11

12

13

Table 1-11. Connector Pin Assignments and Signal Functions

Signal Name Return

Pin No.

Dir.

Functional Description

STROBE 19 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.

DATA 1

DATA 2

DATA 3

DATA 4

DATA 5

DATA 6

DATA 7

DATA 8

20

21

22

23

24

25

26

27

IN

IN

IN

IN

IN

IN

IN

IN

Parallel input data to the printer.

HIGH level means “ 1“.

LOW level means “O”.

ACKNLG 28 OUT

BUSY

PE

SLCT

29

3 0

OUT

OUT

OUT

This pulse indicates data has been received and the printer is ready to accept more data. Pulse width is approximately 1 Ips.

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 +5V through a 3.3K

ohm resistor.)

1-14

1

3 2

3 3

3 4

3 5

Pin

No.

14

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

Signal Name Dir.

Functional Description

AUTOFEED-XT

Return

Pin No.

-IN If LOW when the printer is initialized, the printer automatically performs a line feed upon input of the

CR code (Auto LF).

15

16

17

18

GND

Chassis GND

19 to 30 GND

31 I NIT

3 6

ERROR

GND

SLCT-IN

. .

16

--

--

.-

--

IN

OUT

. .

O U T

IN

Not used.

Ground for twisted-pair grounding.

Chassis ground level of printer.

Not used.

Ground for twisted-pair grounding.

Pulse (width: 50ws, min., active LOW) input for printer initialization.

LOW indicates an error has occurred in the printer.

Ground for twisted-pair grounding.

Not used.

Always HIGH. (Pulled up to +5V through 3.3K ohm resistor.)

If LOW when the printer is initialized, DC l/DC3 control is disabled.

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

2. “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 0.2Ks.

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.

1-15

REV.-A

1.4

CONTROL PANEL

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

k ——

I Lom I -!.

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 acception) and RUNNING.

(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 inch)By pressing this switch more than 0.5 second, the paper is fed continuously until releasing this switch. This switch is also used for the micro feed function.

(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

In tractor-feed mode, pressing this button advances continuous paper to the tear-off position, and the

TEAR-OFF indicator is Iitln friction-feed mode, pressing this button toggles between bin 1 and bin 2, 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.

.

.’)

~.

1-16

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 Cl?.

(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.

INDICATORS

(1) POWER (green)

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

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

These indicators show the currently selected pitch.

1-17

REV.-A

1.5 DIP SWITCHES AND JUMPER SETTING

This section describes the DIP switch selections and jumper setting for the SQ-870/l 170 printer.

1.5.1 DIP Switch Settings

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

6

7

8

4

5

1

2

3

No.

Table 1.12. Settings for DIP Switch 1 (SW1)

Description ON OFF

See

Table 1-14

International character set and PC selection

Character table selection

Graphic print direction

Not Used

Graphic

Unidir.

Italic

Bidir.

Factory

Setting

ON

ON

ON

OFF

OFF

OFF

OFF

OFF

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

No.

Description ON OFF

1

2

3

!

I

I Page length of continuous paper See Table 1-15 I

I [

1 inch skip for continuous paper ON OFF

1 I ,

4 ~ Auto LF ON OFF

Factory

Setting

OFF

OFF

OFF

OFF

I

I

I

1-18

1-1

ON

ON

ON

ON

OFF

OFF

OFF

OFF

1-2

ON

ON

OFF

OFF

ON

ON

OFF

OFF

Table 1-14. international Character Set Selection

1-3 Country Pc

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Us.

France

Germany

U.K.

Denmark 1

Sweden

Italy

Spain 1

437

850

860

863

865

(437)

(437)

(437)

L 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.

REV.-A

2-1

Table 1-15. Page Length

2-2 Page Length

OFF

ON

OFF

ON

OFF

OFF

ON

ON

11 inches

12 inches

8.5 inches

70/6 inches

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

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

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.

c. . .

.“..

.,

‘) :

I

1.6.4 Error Conditions

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

●

P a p e r - o u t

Paper-out is detected after performing paper loading operation.

. I n k e n d

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

1-20

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

REV.-A

(2) Software initialization

Input of the ESC C2 command also initialize the printer. Printer initialization by ESC C? code does not perform functions (d) or(e) above. The settings changed by the last SelecType operation are maintained.

(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 lever.

(a) Automatic cut sheet loading without cut sheet feeder 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 cut sheets into the hopper of the cut sheet feeder.

Pushing LOAD/EJECT button loads a sheet to the top-of-form positionlf paper out is detected before printing starts, a sheet is automatically loaded to the top-of-form position.

(c) Continuous paper loading & ejection (back-out)

Change the release lever to the rear push position or front push position, and set the continuous paper 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 statis, the paper is automatically loaded to the top-of-form position.

F.< o the push tractor unit.

1-22

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 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 position is memorized into the nonvolatile RAM and remains effective even if the power is turned off.

If necessary to cancel this function, press the TEAR OFF button again or press the PAUSE button or send subsequent data to the printer. Then the paper is fed back to the top-of-form position.

1.6.10 Adjust Lever Operation

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

Table 1-16. Lever Positions

Lever Position Paper Type

I

I

Front side

Rear side

Envelope

I Label

Cut sheet

I Continuous paper I

I

Figure 1-11 Lever Positions

1-23

REV.-A

1.6.11

Printhead Protection

To keep the print quality, several kinds of printhead cleaning functions are performed automatically.

(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 is capped. It takes about a second.

●

Printing is stopped about 3 seconds.

● Entering the PAUSE condition.

(3) Refresh nozzles

Performed about every 15 seconds during printing. It takes less than a second.

(4) Cleaning

In the following cases the printhead cleaning is performed and it takes about 20 seconds.

● Turning the power on when the printhead has not been capped.

●

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 functionlt is needed only at the first time the new printer is used.

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 Detection

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.

1-24

REV.-A

1.7 MAIN COMPONENTS

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:

1) C076 MAIN board: the main control board; the CPU on this board controls all main functions.

2) Control panel unit

3)

4)

C076 PSB/PSE

M-47 10/4760: board: the power supply board.

the printer mechanism.

C076 PSB/PSE Board

\

C076 MAIN Board

- Printer Mechanism

M-4760

[ n )4

1 ,

Figure 1-12. SQ-1 170 Component Layout

1-25

REV.-A

1.7.1 C076 MAIN Board (Main Control Circuit Board)

The C076 MAIN board is the main board in the printer, and contains a logic circuit and printer mechanism driver circuit.

The KPD70325 (location: IC5) is used, and the following memories and gate arrays are assigned in the

1 M byte memory space.

Memories

5 12K\l M bits program ROM

1 M bits PS-RAM

8M\4M\2M/l M bits mask ROM (C.G)

Gate Arrays

Memory management unit (E05A65)

Motor control unit (E05A48)

Driver

CR motor (DC motor) driver (SLA4391)

PM motor (DC motor) driver (SDH03)

PF motor (Stepping motor) driver (STK67 12B)

Printhead driver (MPD 16322)

:Ic14

:IC 1 9 / 2 2 / 2 3

:lC3/4/24

:Ic12

:Iclo

:Ic17

:IC16

:Ic 11

:lC8/9

Others

EEPROM

Reset IC (MB3771)

Reset IC (PST529C)

Switching Regulator (TL494)

Lithium battew

:IC2

:IC21

:IC7

:IC20

:BAT 1

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

~o

IJOQ

I

000 -

‘ n

GA E05A48

(Iclo)

\

II ~11

II

CPU PPD70325 P-ROM 5 12K

(IC5)

I

00

❑ n =

(IC14)

o’

0

1 M PS-RAM

(IC19)

‘N ‘L

Mu

1 - - 1

I b 4 ,~i u

“p-RAM

(IC22))

BAT1/

GA L05A65 (1C12)

Figure 1-13. C076 MAIN Board

1-26

1.7.2 Control Panel

The Control Panel is, which includes the indicator LEDs, switches, and DIP switches.

REV.-A

Figure 1-14. Control Panal

1.7.3 C076 PSB/PSE Board (Power Supply Circuit Board)

The power supply unit consists of a switching regulator circuit, which converts the AC line voltage to the DC voltages (for example, + 35V and + 5V) used by the printer. The C076 PSB board is 120V input type, and the C076 PSE board is 220/240V input type.

❑

o

0

I

P

Figure 1-15. C076 PSB/PSE Board

1-27

REV.-A

1.7.4 Printer Mechanism (M-4710/4760)

The M-47 10/4760 printer mechanism was developed specifically for SQ-870/l 170 printer. Included 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.

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

1.7.5 Housing

The LQ-870/l 170 housing consists of the upper, lower, and front cases. The front case houses the control panel.

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

o. .+: -...,.

,’

Figure 1-17. Housing

1-28

CHAPTER 2

OPERATION PRINCIPLES

2.1

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

2.1.1.

Printhead Mechanism .............................................................2.2

2.1.2. Carriage Mechanism ...............................................................2.4

2.1.3.

Paper Feed Mechanism ..........................................................2.6

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

2.1.3.2 Release Lever Operation.........................................2.8

2.1.3.3 Paper Insertion entrance ........................................2.l O

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

2.1.4.1

Pump Motor ................................................................2.l 5

2.1.4.2

Pump Mechanism .....................................................2.l 6

2.1.4.3

Cap Mechanism .........................................................2.l 7

2.1.4.4

Cleaning Mechanism and Carriage Lock

2.1.4.5

Ink Cartridge and Ink End Sensor

2.2

2.1.4.6

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

2.1.4.7

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

2.1.5 Case Open Interlock Switch..................................................2.26

OPERATING PRINCIPLES OF POWER SUPPLY CIRCUITRY..2-27

2.3

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

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

2.3.1

Control Circuitry Overview ...................................m.........mm.mmm.2.29

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

Reset Circuit ...............................................................................2 -31

Detection Circuit .......................................................................2.3 1

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

Carriage Motor Drive Circuit.................................................2.33

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

Pump Motor Drive Circuit ......................................................2.36

2.3.8

2.3.9

TE Motor Drive Circuit ............................................................2.37

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

2.3.10

EEPROM Control Circuit.........................................................2.38

REV.-A

z-i

REV.-A

LIST OF FIGURES

Figure 2-1.

Block Diagram of Printer Mechanism -Model

Figure 2-2.

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

Figure 2-3.

Structure of a Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-4.

Printing Principle (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-5.

Printing Principles (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-6.

Printing Principles (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-8.

Adjustment of Platen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-9.

Friction Feed Method .............................................................2.6

Figure 2-12. Moving the Release Lever ....................................................2.8

Figure 2-13. Arrangement of Gears in Friction Feed

(or Full Release) ........................................................................2.9

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

Figure 2-17. Rear Entrance - Push Tractor Method............................2-l O

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

Figure 2-19. Front Entrance - Friction Feed Method . . . . . . . . . . . . . . . . . . . . . . . . . .2-11

Figure 2-20. Front Entrance - Push Tractor Method . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

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

Figure 2-22. Top Edge Holder Mechanism ...............................................2-l 3

Figure 2-23. Outline Ink Mechanism System .........................................2-14

. . . . .

L

Figure 2-31. Carriage Lock............................................................................2- 19

Figure 2-33. Structure of Ink Cartridge Holder......................................2-2l

Figure 2-34. Structure of Wasted Ink Drain Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21 z-ii

Figure 2-35.

Operational Sequence of Ink Mechanism and

Carriage Position .....................................................................2.22

Figure 2-36.

Figure 2-37.

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

Figure 2-38.

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

Figure 2-39.

Reset Circuit Block Diagram ...............................................2-3 1

Figure 3-40.

Detection Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-31

Figure 2-41.

Paper Feed Motor Drive Circuit..........................................2.32

Figure 2-42.

Carriage Motor Drive Circuit ...............................................2.33

Figure 2-43.

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

Figure 2-44.

Charge/Discharge Circuit .....................................................2.35

Figure 2-45.

Head Charge Condition..........................................................2.35

Figure 2-46.

Head Discharge Condition ....................................................2.35

Figure 2-47.

Timing for Discharge/Charge Pulse..................................2-36

Figure 2-48.

Block Diagram of Pump Motor Drive Circuit.................2-36

Figure 2-49.

Block Diagram of TE Motor Drive Circuit.......................2-37

Figure 2-50.

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

Figure 2-51.

EEPROM Control Circuit .......................................................2.38

LIST OF TABLES

Table 2-1.

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

Table 2-2.

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

Table 2-3.

Ink End/Ink Cartridge Signal ...................................................2.2O

Table 2-4.

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

Table 2-5.

Table 2-6.

Major Elements on C076 MAIN Board and

Table 2-7.

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

REV.-A

Z.iii

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 printhead.

This printer mechanism consists of the printhead unit, paper feed unit, ink mechanism, and sensors.

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

LOCK s

Cover i

PM PF PE/FPE/R F/T TE EDGE CM EN TH DG HEAD IE IE2 B

M S S S

Paper Feed

1

M S

TE Holder

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

1

G=-

I .......1 I Ink

Cartridge

I I Punp Unit I . &:y:e:aln[

I (Cap, Cleaner) ~ i

1

2-1

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

Figure 2-2 shows the internal structure of the printhead. The functions of the major components are 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 printhead is once stored in the reservoir.

O Nozzle

2-3.

Reserver

Piezoelectric Element

Ink Inflow Gate

—

\

\

Nozzle

1

/<”- - - - - - - ’ . \

,’/

I

/;

II

1 \-,/’

I

,’ I

I

I

I

\

\ \

— — — — . -

/

/

;

\

‘ Filter

Figure 2-2. Internal Structure of Printhead

-Damper

,,

!3\

‘ozzem

T

\

Pressure

Chamber

Figure 2-3. Structure of a Nozzle

/

Piezoelectric

Element

Diaphragm

2-2

REV.-A

< Printing >

This section describes how ink is injected through the nozzles.

(1) Normal condition ---Piezoelectric Element is electrically charged and bent inward.

/

Piezoelectric Element

)

Figure 2-4. Printing Principle (1)

(

(2) Charging operation --When the electric charge of the piezoelectric element is gradually discharged, the element is bent outward to let ink into the pressure chamber.

Pressure Chamber

1

Figure 2-5. Printing Principles (2)

I

(3) Injecting operation --The ink in the pressure chamber is injected when the piezoelectric element is quickly charged and bent inward.

1

Figure 2-6. Printing Principles (3)

1

When charging ink or cleaning the printhead, the ink in the pressure chamber is vacuumed out by 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 printhead drive voltage corresponding to 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 printhead drive voltage is increased, or vice versa.

The temperature signal is fed back to the printhead drive voltage control circuit to adjust the voltage to a proper level.

2-3

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. Instead, the carriage is designed to hit the 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.

$s2

>:”

/

/

A

Carriage

.

k

SHAFT, CR, GUIDE, MAIN

/Timing Belt

Carriage

Motor

Figure 2-7. Carriage Mechanism m

2-4

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.) r

LEVER, GAP, ADJUST

\

\ o

L—.

Figure 2-8. Adjustment of Platen Gap

2-5

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

Top Entrance

OK

No

No

Rear Entrance

No

OK

OK

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

Front Entrance

OK

OK

OK

A

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 k

.

Cut-Sheet Paper

.

\

.’

Figure 2-9. Friction Feed Method w

2-6 r r

F?ed

REV.-A

Push Tractor Method

In 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 front entrance.

/“

/

/

.’

/-’--=..

c>’’””””’ “P”

Rear Entrance

%.

Platen

> AZ=/’ - - R e a r P u s h

\

Front

\

Entrance

‘(u

Uz –’

Front Push

Tractor

Figure 2-10. Push Tractor Operation

Pajer

Feed

Motor

2-7

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, while the pull tractor pulls the paper from the printhead. This provides more accuracy in paper feeding operation.

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

w

,’

/

,,fi

Pull Tractor

\

\~

Rear Push Tractor

/,/

/ t}

Paper Feed

~ “?

or w

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).

Release Lever d F

~ H’aper’uide

8 hY?-

\ Release Sensor

Pa~er “Feed Roller

Fiaure 2-12. Movina the Release Lever

2-8

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.

Platen Gear (Platen Drive)

Roller

Pinion Gear o

Front

GEAR, 34.5

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

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

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).

ear PE Sensor

Rollers

u “

Figure 2-16. Top Entrance - Friction Feed Method

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 ASSY., REAR).

Paper

~ y’ ‘“’de

Roller

.-. ,, PR

1

7

I y Rear Entrance

‘“p’at&

“Jilr

Figure 2-17. Rear Entrance - Push Tractor Method

2-10

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

REV.-A

Paper Tension Roller \ /-

Paper

Printhead

Front PE Sensor

Figure 2-20. Front Entrance - Push Tractor Method

Paper,

Paper Tesion Roller

\ x - i /

A

Pull Tractor

I

Pnnthead

1

‘7

4

Front PE Sensor

/

~Front Push Tractor

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

‘ ~

.,. .

L

2-12

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).

Lett

Frame

(

T

OD

Edae Holder Plate

,, l’-

/

TE Sensor

,C------l -— — c ’

\ r!,r‘: 1 (Printhead)

Platen

/ “

1,0

~--+ 1;

,/’--

0

/

\ \’;y------

?& j \ \ \ “=’r-”’L---

( ‘-— \

\

\

\ o j

“ = . . - / ”

)

\ “-’ >TE M o t o r

Figure 2-22. Top Edge Holder Mechanism

2-13

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

u

Wasted Ink

Drain Tank

/

I

1

/

Ink Tank

Figure 2-23. Outline Ink Mechanism System c:..~.

,’.,, ,...,

(’

2-14

REV.-A

2.1.4.1 Pump Motor

The pump motor drives through several gears.

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

Cleaning Blade

Drive Gear

Pump Motor r

1 .

Gear

I

Cleaner Lever

Rubbing Cleaner

Blade

CR Stopper

Figure 2-24. Pump Motor

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

Rotational Direction

C c w

Cw

Operation of Each Part

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 - 1 5

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 dust./bubbles within the nozzles.

Figure 2-25 illustrates the operation of the pump. When the pump motor rotates CCW, the pulley pumps 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.

Pumping (Pump motor:CCW)

@.@+@

No Pumping (Pump motor:CW)

Wheel Pumo

Pulley Pump

Pumping (CCW)

Figure 2-25. Pump Movement

No Pumping (CW) c

‘+

“/’

2-16

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 printhead section. This causes the ink in the printhead to flow toward the pump through the cap.

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 printhead.

Carriage Movement

-

Carriage

Inl

Negative Pressure

--w17%

Air and

Wasted Ink 4

/

To Wasted

Ink Drain Tank

$

Figure 2-26. Cap Movement

Carriage Movement

Q

‘

Close

Figure 2-27. Air Inlet Operation

Air

Slider

Valve

/ popen

—Air

Inlet

2 - 1 7

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 o. .

Movement

Prin;head

Cleaner

/

Blade Side (Rubber)

Figure 2-28. Cleaner Blade Operation

/

Cleaner Lever

L-

/

2arriage

%

Rubbing Blade

Side [Pad) m

- P r i n t h e a d

Figure 2-29. Rubbing Block Operation c.’

2 - 1 8

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 printhead is locked in the capped state, this lever functions as a printhead holder and prevents the cap from coming off in a shock.

Print ner Lever riage Stopper

Figure 2-31. Carriage Lock riage

2-19

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 ASSY., INK) is designed to detect this plate.

Ink Pack

/

[:

\ c

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 ASSY., INK CARTRIDGE). The ink end sensor 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.

I

Status

Ink Cartridge Exist/Ink Exist

Ink Cartridge Exist/Ink Not Exist

Table 2-3. Ink End/Ink Cartridge Signal

IE Sensor

Close

Open

IC Sensor

Close

Close

IE Signal

LOW

HIGH

Ink Cartridge Not Exist Open Open HIGH

IC Signal

LOW

LOW

HIGH

I

Ink Cartridge Sensor

/

/

II J

To

Printhead

#

Ink Supply

- ~Needle

!1 I

Ink End Sensor

Figure 2-33. Structure of Ink Cartridge Holder

2-20

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

II

11

I 1

1

Absorber

J

Figure 2-34. Structure of Wasted Ink Drain Tank

2-21

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 printhead is moved to the position where the cap covers the nozzles (the refresh position) and then ink is injected from all the nozzles toward the cap.

● 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 printhead following the ink charge operation.

It consists of the cleaner blade operation- and 3000-pulse ink flushing operation that follows.

● Cleaner blade operation-3

This operation is petformed to remove ink mist from the printhead. It consists of the l-second ink discharge operation and the cleaning blade operation- that follows.

● Rubbing operation

This operation is performed to remove head preserving liquid, ink, or dust which is heavily adhered to the surface of the printhead. Refer to 2.1.4.4 for the details.

Cap Cleaner

Carriage

/

/

~-. * ~-,i-,

, l+ t ‘

;_. ~-->, :-J

/

/

Platen

/

Left Side

I

‘---x’

Printing Area h’

I

I

I

I

I

Right Side

Negative Pressure

Release Area

-1

I

=1

Flushing Area

Bottom Side

I

I

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

2-22

.=4

.. .,

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.

They are described in a), b), c), d) below. The timer will be reset in the following cases; the CL1 or CL2 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

● 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 printhead nozzles from drying up by keeping the inside of the cap moistened. After this operation, the printhead will be capped again.

b) Carriage Position: Home position

● 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, the printhead 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

REV.-A a) CL1 (Normal cleaning)

This operation consists of the cleaner blade operation-1, negative pressure release operation, and cleaner blade operation-2.

b) CL2 (Intensive cleaning)

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.

c) CL3 (False cleaning)

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.

o

(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.

( ‘

,.

+-:.

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2-24

REV.-A a) Initial charge operation-1

This operation is performed when the printhead is not capped at the time the user operates the initial 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 printhead is capped at the time the user operates the initial 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.

● 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

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 (EEPROM) on the

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.

2 seconds: 10 points

4 seconds: 23 points

5 seconds: 30 points

7 seconds: 40 points

60 seconds: 400 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 printhead drive voltage to reduce the torque of the carriage motor by inserting the interlock resistor in series into the carriage motor drive circuit.

Figure 2-36. Interlock Switch

,1

2-26

0

.>

REV.-A

2.2 OPERATING PRINCIPLES OF POWER SUPPLY CIRCUITRY

The power supply circuitry of this printer is provided with either C076PSB board (120V) or C076PSE 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.

Board Name

C076PSB

C076PSE

Table 2-4. Ratings of Power Supply Board

Input Voltage (ACV)

103.5-132

1 9 8 - 2 6 4

Fuse (F I ) Rating

2.5 A/ 125 V

1.25 A/ 250 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.

Voltage

+ 3 5 VDC

+ 5 VDC

Table 2-5. Voltage Allocation

Application

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

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 to +35 VDC voltage. This +35 VDC voltage is fed back to the switching circuit by the + 35V line voltage detection circuit and thus stabilized.

The +35VDC voltage is also sent to the +5VDC power supply circuit and thus dropped to stable +5

VDC voltage.

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

1 ) + 5 VDC line over voltage/current protection circuit

When the current flowing on the + 5 VDC line increases, the over current protection circuit cuts the current. When the voltage of the + 5VDC line exceeds a certain value (+ 7V), the switching circuit is turned off to stop the generation of +35 VDC voltage. The over current protection circuit is included in the over voltage protection circuit.

2-27

REV.-A

2) +35 VDC over voltage protection circuit

When the voltage of the +35 VDC line exceeds a certain value (+36V), the switching circuit is turned off to stop the generation of +35 VDC voltage.

3) + 35VDC under voltage protection circuit

When the voltage of the +35VDC line goes lower than a certain value, the switching circuit is turned off to stop the generation of +35 VDC voltage.

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Power Supply Board

~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - I

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Primary

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Smoothing

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Clrcult

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+35 line

Detector

Circuit

+5 line

Voltage

Overload

Protection

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Voltage

Overload

Protection

Circuit

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Drop

Protection

Circuit

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

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AC Input

Figure 2-37. Power Supply Circuit Block Diagram

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 wPD70325 (V25 +) (9.5 MHz) – a 16-bit one-chip microprocessor, E05A65 - a gate array with memory management function, and E05A48 – a gate array to control DC motors. Figure 2-38 shows the control circuitry block diagram.

I – – - – – -

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—--—-——7

{ C o n t r o l ~ Case Open ~

, Panel l–- - - -

~ j Sensor

- - - - - - - -

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C076 MAIN Board

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, - - - - - - - - - - - - - - - - - - - - - - - - - - - –---------–- - - – - - – - - - - – - - - - - - - - - -

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IC8,9 IC16

SOH03 L l --------- -------

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IC18

PU1501

3

STK

6712B

Icll t

SLA4391

E

IC17

Battery

El

Circuit

Reset

3

— - _ --- _--—---— -— —--- —- —— -. _ _ - — - _ - — — - - - — - — - —

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Figure 2-38. Control Circuitry Block Diagram

2-29

REV.-A

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

Element wPD70325

(V25 +)

E05A65 i05A48

SLA4391

>TK67 12B

50H03

~PD 16322 t140B03

I

Table 2-6. Major Elements on C076 MAIN Board and Their Functions

Location ~ r

Function

IC5

Ic12

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

‘ it in the input buffer in PS-RAM by interrupting. The stored data is then converted to image data and stored in the image buffer in PS-RAM. The 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

Ic 10 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).

Ic17

Ic 11

ICI 6

IC8,9

IC4

This IC drives the PF motor (Stepping motor).

This IC drives the pump motor (DC motor).

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

M PS-RAM I C19

(IC22)

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

! in these ROMs.

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

~ image data.

.,-..

. . .. .

2-30

REV.-A

2.3.2 Reset Circuit

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

RESET signals until +5 VDC is stable. This controller can also reset itself by setting RSTRG signal(160 pin of E05A65 gate array) to LOW. The block diagram of this circuit is shown in Figure 2-39.

GA

E05A65

IC12

RSTRG

160

+5V

A

6

MB3771

IC21

8

RESET

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) ---Head drive circuit

● + 35VDC under voltage detection circuit---EEPROM control circuit

Case open sensor (interlock switch)

Encoder

---Head drive circuit /Carriage

---Carriage motor drive circuit motor drive circuit

IE2

E

GAP

Ffi

EDGE

PE

PT7

PT6

PT5

PT4

PT3

PT2

PE(Rear)

“3

PT1

CPU

V25+

IC5

Figure 3-40. Detection Circuit Block Diagram

2-31

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 STK67 126, which detects the current flowing in the coil of the stepping ~otor, and keeps the current constant by cutting the current that exceeds a certain 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 E05A65 and outputted to STK67 126 in 4 steps. (The motor retaining mode is also included.)

The phase of the paper feed motor is also switched through E05A65.

CPU

(IC5)

Bus

E05A65

(IC12)

PAO

PA1

PA2

PA3

+3SV

STK6712B

(Icll)

V R E F E

PFCOM k

PFA

PF~

PFB

PFB

PD2-O ~.

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Figure 2-41. Paper Feed Motor Drive Circuit

2-32

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

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

CPU

(IC5)

INTPO

Bus

E05A48

(Iclo)

PNP1

PNP2

NPN1

NPN2

ENCA

S T O P ENCB

%4

4391

(IC17)

Figure 2-42. Carriage Motor Drive Circuit

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ENCODER

This printer has four different carriage speeds as listed below.

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Table 2-7. Carriage Motor Drive Modes

Mode No.

Carriage

Speed

6.60 KHz

I 4.80 KHz

2.40 Khz

0 . 4 8 KHz

Dot Density

180 DPI

I 360 DPI

360 DPI

●

I

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

2-33

+35V

Thermistor

REV.-A

2.3.6 Printhead Drive Circuit

Figure 2-43 shows the printhead drive circuit.

The print data developed by CPU is transferred to the head control gate array - E05A65 (ICI 2) via data bus. The data for 48 nozzles stored in E05A65 is serially transmitted from HDDAT port to the head driver - ~PD 1632 (IC8,9). HDCLK is a clock for this serial transmission. The E05A65 transmits HDSTB signal as soon as the data transmission for 48 nozzles is completed.

The head is controlled by CHG and DSCHG pulses.

CPU

(IC5)

+ VH

Bus

E

E05A65

(IC12)

ALDCHG

HDSTB

DSCHG

HDCLK

1

— r

-=1

CLK

A

I

— +B I

L~

CHG

STB

BLK

CLK

B

- - -

CHG

STB

BLK

---

I 1 uPDI 6322

(IC6,9)

+ VH

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Figure 2-43. Printhead Drive Circuit

Charge

Circuit

Print head voltage supply circuit.

2-34

REV.-A

(1) Charge/discharge circuit

Figure 2-44 shows the chargeidischarge circuit,

CHG o

R35

AAA

~Mnchage

Q3 DCH yPDl 6322 (IC8, 9)

Rs

ALDCHG o

G

HI-48

DSCHG o-

0 -

-

Figure 2-44. Charge/Discharge Circuit

< Charge pulse >

1

GH

When the gate array (E05A65) outputs HIGH pulse from CHG port, the transistors (Q3,9) go ON and thus the Vh voltage charges the piezoelectric elements (PZD) through the diode (DCH) and resistor (RCH).

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

/

Piezoelectric Element

=

Figure 2-45. Head Charge Condition

< Discharge pulse >

The data for 48 nozzles stored in the gate array (E05A65) is serially transmitted from HDDAT port to the printhead drive IC (pPD 16322). Following this, the discharge pulse is transmitted from E05A65 to KPD 16322. The KPD 16322 then discharges PZD according to the print data to cause the nozzles to inject ink. (PZD is always charged by Vh.)

For cleaning operation, the E05A65 sends ALDSCHG signal to pPD 16322, which automatically discharges ail the piezoelectric elements to cause all the nozzles to inject ink.

Figure 2-46 shows the nozzle in discharge condition.

Figure 2-46. Head Discharge Condition

2-35

REV.-A

Figure 2-47 shows the timing for discharge/charge pulse.

Figure 247. Timing for Discharge/Charge Pulse

(2) Printhead Voltage Supply Circuit

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 voltage boosted to 83 -123.7 VDC 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 TL494.

Since each printhead produced shows slightly different characteristics, this difference must be neutralized by adjusting the head drive voltage. For this purpose, several zener diodes (used for detecting output voltage) and a DIC jumper are provided. When the printhead or the MAIN board is replaced, adjust the DIC jumper to connect the zener diodes in proper arrangement.

< 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 (IC 16).

The rotational direction of the motor is controlled through the ports on E05A65. If PMCW signal is transmitted from PCO, the motor rotates CW. If PMCCW signal is transmitted from PC 1, the motor rotates

Ccw.

CPU uPD70325 (IC5)

Bus

GA

E05A65 (IC12)

P c l

Pco

SOH03 (IC16)

NPN2B

PNPIB

PM+

PM-

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Figure 248. Block Diagram of Pump Motor Drive Circuit

Pump

MOTOR

...

...”5

c)

2-36

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 E05A65 to the driver - PU 1501, and controls the stepping motor by constant-voltage method. The TE motor is supplied with + 5 VDC in hold mode, and +35 VDC in drive mode. This switching is controlled through the port PD3 on E05A65.

CPU

(IC5)

Bus

E05A65

PAO

-PA3

PD3

Phase

DATA

PU1501 (IC18)

DRIVER

CIRCUIT

DRIVE

VOLTAGE

CHANGE

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

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

+ 3.3 VDC or less, the power is supplied from the lithium battery.

TIMER

BUS

CPU

(IC5) CIRCUIT

TC8521AM J

(6E)

BAITERY n

Figure 2-50. Block Diagram of Timer Circuit/Backup Circuit

2-37

REV.-A

2.3.10 EEPROM Control Circuit

This printer is provided with an EEPROM to store the data such as panel settings, paper position data

(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 (IC7) and, as soon as the voltage goes lower than +25 VDC (approx.), transfers the data from the RAM to the EEPROM.

The data in EEPROM is read/written by/to E05A65 in serial mode.

+35VDC

+

PST529C

(IC7)

CPU

NMI

(IC5)

BUS

RAM

GA

E05A65

(IC12)

Serial

EEPROM

(IC2)

Figure 2-51. EEPROM Control Circuit

.., , ;

. . .

2-38

CHAPTER 3

DISASSEMBLY AND ASSEMBLY

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

REV.-A

3.2.2 Printhead Replacement.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.3 Wasted Ink Drain Tank Replacement

(TANK, INK EJECT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

3 . 2 . 5 . 1 M A I N B o a r d R e m o v a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1 7

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

3.2.6 HOLDER ASSY., INK CARTRIDGE Removal ................... 3-1 9

3.2.7 Printer Mechanism Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

3.2.7.1 Disassembly of PAPER HOLDING ASSY. ...... 3-20

3.2.7.2 Disassembly of CAP ASSY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

3 . 2 . 7 . 3 D i s a s s e m b l y o f P U M P ASSY. and

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 D i s a s s e m b l y o f C a r r i a g e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25

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

3 . 2 . 7 . 8 S T E P P I N G M O T O R , T O P E D G E H O L D E R

3 . 2 . 7 . 9 D i s a s s e m b l y o f PLATEN ASHY. . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

3.2.7.10 Disassembly of PAPER GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . .3-31

3.2.7.11 Disassembly of FRAME ASSY., RIGHT . . . . . . . . . . . 3-33

3.2.7.12 Disassembly of TRACTOR ASHY. . . . . . . . . . . . . . . . . . . . . . 3-35

S.i

REV.-A

LIST OF FIGURES

Figure 3-1.

How to Make a False Ink Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Figure 3-2.

Releasing Carriage Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-3.

Setting Shockproof Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Figure 3-4.

Fastening Tube Set Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 3-7

Figure 3-5.

Removal/Disassembly Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

Figure 3-6.

Housing Removal (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-7.

Housing Removal (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-8.

Housing Removal (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 3-9.

Printer Head Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

Figure 3-10. Setting PIN, ADJUST Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

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

Figure 3-12. Attaching Wasted Ink Drain Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Figure 3-13. Removing SHIELD PLATE, I/F.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19

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

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

Figure 3-22. Disassembly of PUMP ASSY. and CLEANER ASSY. 3-22

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

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

Figure 3-25. Disassembly of Carriage (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25

Figure 3-26. Disassembly of Carriage (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25

Figure 3-28. STEPPING MOTOR, PF Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27

Figure 3-29. STEPPING MOTOR, TOP EDGE HOLDER Removal . . . 3-27

Figure 3-30. Disassembly of PLATEN ASSY. (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28

Figure 3-31. Disassembly of PLATEN ASSY. (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29

Figure 3-32. Aligning HOLDER, PLATEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29

Figure 3-33. Disassembly of PAPER GUIDE (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31

Figure 3-34. Disassembly of PAPER GUIDE (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31

Figure 3-35. Direction of SHAFT, RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32

s-ii

c’\

,j

,

Figure 3-36.

Figure 3-37.

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

Figure 3-38.

Figure 3-39.

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

REV.-A

LIST OF TABLES

Table 3-1.

Ink Handling Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-2.

Table 3-3.

Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Table 3-4.

Table 3-5.

Abbreviations List of Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Table 3-6.

Table 3-7.

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

Service Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Table 3-8.

S.iii

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.)

C A U T I O N

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

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.

Condition

When replacing printer mechanism, head, or pump.

When returning the printer to the user.

Table 3-1. Ink Handling Steps

Trouble expected

Ink leakage

Countermeasures

Cap the printhead.

Discharge all the ink.

Cap the printhead.

Ink leakage

(caused by shock or vibration)

Clogging of nozzles

(caused by long left ink)

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

=.,) c 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.

@

(3) Close the case.

(1) Open the ink cartridge case.

(2) Take out the ink pack.

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

3-2

REV.-A

< Filling preservation liquid>

If it seems to take more than a week before the user receives the printer, fill the printhead with preservation liquid. You can fill the liquid in the following procedure:

[Step 1] Set the false ink cartridge on the ink cartridge holder.

[Step 2] Insert the preservation liquid charge identity ROM module (TRANSPORTATION LIQUID FILL

UP PROGRAM CARTRIDGE #F588) into the ROM cartridge slot.

ISteo 3] Power ON. The BIN 1 LED on control panel brink, and printer discharge ink for printer

[Step 4] mechanism ink path.

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

[Step 5] 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.

[Step 6] When the MICRO FEED LED blink, change the preservation liquid cartridge to false ink

[Step 7] cartridge.

Push the FORM FEED switch. The TEAR OFF LED blink.

[Step 8] When the MICRO FEED LED blink, push the FORM FEED switch.

[Step 9] When all LEDs on the control panel, power off.

< Ink charge (initial charge)>

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

Figure 3-2. Releasing Carriage Lock

3-3

RIAGE LOCK

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 value;[5,000 X 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”.)

●

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

(3) Transportation

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

● Capping

● Removing ink cartridge

●

Setting shockproof attachments

● Packaging

St b

Packing Material

REV.-A

Protective Sheet

Packing Material

Figure 3-3. Setting Shockproof Attachments

3-5

REV.-A

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

1

Procedure

Capping

2 Ink discharge

Table 3-2. Service Process

Description Cartridge used

Cap the head None

Remove all the ink in the ink path

False ink cartridge

Remarks

Power on/off or manually

Perform cleaning about 10 times

3 Repair

4 Self test

5 On-line test

6 Filling preservation liquid

7 Capping

8 Packaging

Check

Check

Fill the ink path with the liquid

Cap the head

Set shockproof attachments

Ink cartridge

Ink cartridge

Preservation liquid cartridge

Test Print

On-line Print

Refer to Page 3-3

Power on/off

●

, . .

,.

c’

(4) Maintenance

Perform lubricating, adhering, and cleaning according to Chapter 6 ‘“Maintenance” after disassembling/assembling and/or adjustment.

(5) Adjustment

Make adjustment replacement.

according to Chapter 4 “Adjustment” after disassembling/assembling and/or c-., g-:;

3-6

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

1.

Insert the tube fully.

2. Set the O-ring.

3. Tighten the tube set screw.

Figure 3-4. Fastening Tube Set Screw

Table 3-3. Tools

Tool

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) XE589

Transportation liquid cartridge #F587

Transportation liquid fill up program cartridge #F588

Thickness gauge (1 .00 mm) #F590

Dummy register #F591

Dial gauge #F603

Dial gauge base

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

Designation

Table 3-4. Instruments

Specification

Oscilloscope

Multi meter

20 MHz

Availability

E

E

E

E o

E o o o

E o

0 o o o o o o o

Part No.

B740400 100

B740500 100

B74 1000100

B740200 100

B 7 4 0 8 0 0 4 0 0

B740800500

B740800600

B740800800

B 7 4 3 8 0 0 2 0 0

B743000 100

B74 1 7 0 0 2 0 0

B 7 4 7 7 0 0 2 0 0

B765 106901

S02001 9

C820 180

1 0 1 1 0 1 9

1 0 1 1 0 2 0

1 0 1 1 9 7 4

1 0 1 1 0 1 8

3-7

REV.-A

< Screw designation>

I

Ail small parts, such as screws and washers, are indicated by abbreviations.

Abbreviation

Table 3-5. Abbreviations List of Small Parts

Part Name

C.P.S. Screw Cross-recessed Pan-head S-tight screw

C.B. B. Screw Cross-recessed Bind-head B-tight screw

Cross-recessed Cup-head Uska screw C.C.U. Screw

C. B. S-tite Screw Cross-recessed Bind-head S-tight screw

Cross-recessed Bind-head screw C.B. Screw

C. P. B-tite Screw

C.B.S. Screw

C.B.P. Screw

C.C. Screw

C. P. S. (P) Screw

Cross-recessed Pan-head B-tight screw

Cross-recessed Bind-head S-tight screw

Cross-recessed with Plain washer screw

Cross-recessed Cup-head screw

Cross-recessed Pan-head S-tight with plain washer screw

Top

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

Heed Body washer

(~bled)

Side

1.~ross–recessed head 1.Bind

I

1 .~ormal 1.~lain washer

(Q)@

@

!.~lotted head e

2.~an i

0=

1.

t=

(with Notch)

0=

2.

~-tight

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

2.@tside toothed lock washer

‘&; Q@

3.gup

~ 1

~ ---

0=

4. Iruss

~—

1 .

(1=

4.~appin9

\,,’ ,j,:, ,:,1,

Jf!f!!m

3.~pring washer

~g

3-8

REV.-A

3.1.3 Service Check

List

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

Category

Printer features

~djustment

Component

Printhead

Carriage

Mechanism paper advance mechanism

Paper path

Table 3-7. Service Check List

Item to Check

Nozzle clogging

Does the carriage move smoothly?

❑

Movement noisy,

❑

Mechanism dirty,

13 Mechanism oily

Is the carriage motor running at the correct temperature and not overheating?

Is the paper advancing smoothly?

❑

Movement noisy,

❑ iMechanism dirty,

❑

IMechanism oily

Is the paper advance motor running at the correct temperature and not overheating?

Is the type of paper in the printer feeding smoothly?

Is the tractor feeding the paper correctly?

Is the paper path clear of all obstructions?

Is the tank full?

Is Check Required?

❑

Checked, ❑ Not necessary

❑

IChecked,

❑

Not necessary

❑

❑

Checked,

IChecked,

IJChecked,

❑

❑

Not necessary

IChecked,

❑

❑

❑

INot necessary

Not necessary

INot necessary

❑

IChecked,

❑

INot necessary

IZChecked,

❑

INot necessary llChecked,

❑

INot necessary Wasted Ink

Drain Tank

Self-test

On-line test

Printhead

Printing

Circuit board

ROM version

Was the self-print test successful?

Was the on-line test successful?

Are the platen gap and the platen parallelism adjusted correctly?

Are the bi-directional print position and head slant adjusted correctly?

Is the printhead drive voltage adjusted correctly?

The ROM version is XXXX.

❑

Checked,

13 Checked,

IJChecked,

IJChecked,

❑ iNot necessary

EIChecked, 13 Not necessary

13 Checked,

❑

Not necessary

❑

INot necessary

❑

Not necessary

❑

Not necessary System

Jpgrade shipment Has the ink cartridge been removed?

Has the preservation liquid been filled?

Have all relevant parts been included in the shipment?

❑

IChecked,

❑

INot necessary llChecked,

❑

Not necessary llChecked, ilNot necessary

3-9

REV.-A

3.2 DISASSEMBLY AND ASSEMBLY

This chapter describes procedures for disassembling main components of this printer. Unless otherwise specified, the disassembled unit or components can be reassembled simply by performing the disassembly procedure in the inverted sequence. The assembly procedure is, therefore, omitted in this manual. Cautions for the assembly procedures are shown as “ASSEMBLY POINTS”. Adjustments required after assembling are shown as “REQUIRED ADJUSTMENT ITEMS”.

e

●

Be sure to read section 3,1 and follow instructions when attempting to disassemble the unit.

●

Before disassembly, remove shockproof attachments used for transportation.

●

Before disassembly, remove paper and ink cartridge.

This section consists of the following seven paragraphs.

(1) Housing Removal (2) Printhead Replacement (3) Wasted Ink Drain Tank Replacement (4) Printer

Mechanism Removal (5) Circuit Board Removal (6) Ink Cartridge Holder Removal (7) Printer Mechanism

Disassembly Refer to the exploded view of the printer in the APPENDIX for reference.

Da

3.2.2

3-12

I

3.2.1

3-11

I

I l%intheacll%placernent I ] I-lousingRemoval [ I

I

Printer Mechanism

Removal

I 1

I

I

EEEl - ,

323

I

3-’4

I Wasted Ink Drain Tank

Replacement I

I

I

C7*,,.

J

. .

<.”

. .

3.2.5.2

3-18

POWER SUPPLY Soard

Removal

I

I

Figure 3-5. Removal/Disassembly Flow Chart

3-1o

REV.-A

3.2.1 Housing Removal

This paragraph describes the procedures for removing the HOUSINGS, FRONT and UPPER.

[Step 1] Remove the SHEET GUIDE ASSY., REAR, the COVER, PRINTER, the COVER, FRONT, the SHEET

[Step 2]

GUIDE ASSY., FRONT, the tractor, and the knob.

Unscrew C.B. B. screw (M3 X 12) attaching COVER, GEAR to the HOUSING, UPPER, to remove

[Step 3] the COVER, GEAR.

Unscrew C.B. screw (M4 X 16) attaching the HOUSING, UPPER and C.B.B. screw (M3 X 12) attaching the HOUSING, FRONT to the HOUSING, UPPER.

C.B.B. Screw (M3 X 12)

I

C.B. Screw (M4 X 16)

\ /

C.B.B. Screw (M3 x 12)

UPPER

Figure 3-6. Housing Removal (1)

[Step 4]

[Step 5]

Remove 3 pawls attaching the HOUSING, FRONT to the HOUSING, UPPER.

( ~80-column printer: 2 pawls)

Pull the HOUSING, FRONT toward you, and disconnect 2 connectors on the control panel to remove the HOUSING, FRONT.

HOUS

Figure 3-7. Housing Removal (2)

3-11

REV.-A

[Step 6] Disconnect the connector that connects the interlock switch to the resistor at the rear of the

[Step 7] printer mechanism.

Raise the front side of the HOUSING, UPPER with the rear side held.

Figure 3-8. Housing Removal (3)

3.2.2 Printhead Replacement

This section describes the procedures for disassembly and assembly of the printhead.

[Step 1] Discharge ink. (Refer to section 3.1. 1.)

[Step 2 ]

[Step 3]

Remove the housing. (Refer to section 3.2. 1.)

Remove C.B.S. screw (M3 X 8) fastening the PRESSING PLATE, COVER SPRING, LOWER to remove the PRESSING PLATE, COVER SPRING, LOWER.

[Step 4] Release the carriage lock. (Refer to section 3.1. 1.)

[Step 5]

[Step 6]

Disconnect FPC of the printhead from 2 connectors on the carriage.

Remove 2 screws (CUP screw (M3 X 8)) attaching the printhead to the carriage.

[Step 7] Loosen the TUBE SET SCREW attaching the TUBE, SUPPLY, INK to the printhead to remove the TUBE, SUPPLY, INK from the printhead.

TUBE SET SCREW

,..

;,. ., f!s’

X 8)

OWER

Corm

Figure 3-9. Printer Head Replacement

3-12

REV.-A

ASSEMBLY POINTS

When assemble the printhead, follow the procedures shown below.

[Step 1] Verify that the PIN, ADJUST on the carriage is set in the direction as shown in the Figurt below.

r,

II

PIN, ADJUST

I

Mark

Mark

\ nn l-l I I I I ~.arriw

Figure 3-10. Setting PIN, ADJUST Direction

[Step 2]

[Step 3]

Engage the tube set screw and O-ring onto the TUBE, SUPPLY, INK.

Connect the TUBE, SUPPLY, INK to the printhead and tighten the TUBE SET SCREW with

[Step 4] a tightening torque of 1 kg (Refer to section 3. 1.2.).

Mount the printhead on the carriage and fasten the printhead with 2 screws (CP (P) (M3X 8))

(See Figure 3-9.)

[Step 5] Attach the cover, TUBE to the frame, FRONT with the screw (CUP screw (M3 X 8)) and the

[Step 6]

PRESSING PLATE, COVER SPRING, UPPER.

Loosen the screw (CUP screw (M3 X 8)) which fasten the printhead along with the PRESSING

PLATE, COVER SPRING, UPPER and then adjust the PRESSING PLATE, COVER SPRING

UPPER until it is parallel to the COVER, TUBE.

[Step 7] Verify that the COVER, TUBE does not interfere with the FPC by manually moving the carriage left and right.

Id FPC

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

3-13

REV.-A

REQUIRED ADJUSTMENT ITEMS

If you have disassembled/assembled the printhead, make the following adjustment after repair.

●

Printhead slant adjustment (Refer to section 4.5. 1.)

If you have replaced the printhead, make the following adjustment in the specified sequence,

(1) Platen gap adjustment (Refer to section 4.2.)

(2) Printhead drive voltage adjustment (Refer to section 4.4.)

3.2.3 Wasted Ink Drain Tank Replacement (TANK, INK EJECT)

This section describes how to replace the wasted ink drain tank.

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step 2] Separate the pump tube from the wasted ink drain tank (TANK INK, EJECT).

ASSEMBLY POINTS

Be sure to apply the pump tube through the retaining hole before attaching the pump tube.

Be sure to set the wasted ink drain tank (TANK, INK EJECT) in the correct direction onto th

HOUSING, LOWER.

If you have replaced the tank, reset the ink tank replacement counter according to 3.1.1.

Following this, be sure to adjust PRINT POSITION setting (Refer to section 4.5.2.) which has als been reset.

c..,,

“’\

4, ;) c. . .

Ie

Figure 3-12. Attaching Wasted Ink Drain Tank

3-14

REV.-A

3.2.4 Printer Mechanism Removal

This section describes how to remove the printer mechanism.

W A R N I N G

When working with the printer mechanism, take sufficient care in handling the ink.

Carefully read the precautions in 3.1.1 before beginning the work.

C A U T I O N

Discharge ink from the printer before removing the printer mechanism.

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step 2 ]

[Step 3]

Discharge the ink in the ink path of the printer mechanism. (Refer to section 3.1. 1.)

Unscrew 3 C.C.U. screws (M3 X 8) and 1 C.B.B. screw (M3 X 12) to remove the SHIELD PLATE,

I/F.

Printer Mechanism

C.C.U. Screws (M3 X 8)

MAIN Board

SHIELD PLATE, l/F

C.C.U Screw (M3 X 8) C.B.B. Screw (M3 X 12)

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

[Step 4]

[Step 5]

Separate the pump tube from the wasted ink drain tank.

Remove the TUBE, SUPPLY, INK from the ink cartridge holder by removing the TUBE SET

SCREW that fastens the TUBE, SUPPLY, INK to the cartridge holder.

[Step 6] Remove the cords (connected to the DETECTOR ASSY., INK CARTRIDGE and the DETECTOR

ASSY., INK) from the rear side of the printer mechanism.

z’ tridge Holder

Figure 3-14. TUBE, SUPPLY, INK Removal

3-15

REV.-A

[Step7] Disconnect the following connectors, which connect the printer mechanism to the MAIN board;

CN 13 (Blue/6 pins), CN 14 (White/6 pins), CN 12 (White/2 pins), CN15 (White/2 pins), CN 18

(FPC/26 pins), CN 17 (FPC/36 pins), CN 11 (White/3 pins), CN 10 (Blue/3 pins), CN9 (Yellow/2 pins), CN8 (White/2 pins).

[ S t e p 8 ] Remove the 4 screws (PRINTER MECHANISM MOUNTING SCREW) fastening the printer mechanism to the HOUSING, LOWER.

C A U T I O N

When loosening the screws that fasten the printer mechanism, take sufficient care not to damage the FPC.

[Step 9] Remove the printer mechanism.

M.

R

Figure 3-15. Printer Mechanism Removal

ASSEMBLY POINTS

Be sure to mate the connectors with each correct partner referring to the Table below.

<’

Table 3-8. Connector Connection

Printer Mechanism Side I M A I N B o a r d S i d e

Release detector (White: 2 Pin)

PE sensor (Front; (Yellow: 2 Pin)

TE sensor (Blue: 3 Pin)

PE sensor (Rear) (White: 3 Pin)

Pump motor (White: 2 Pin)

TE motor (Blue: 6 Pin)

PF motor (White: 6 Pin)

CR motor (White: 2 Pin)

CN8 (White)

CN9 (Yellow)

CN 10 (Blue)

CN 11 (White)

CN 12 (White)

CN 13 (Blue)

CN 14 (White)

CN 15 (White)

●

Refer to “ASSEMBLY POINTS” in 3.2.3 when inserting the pump tube into the wasted ink drain tank.

“>.

u

3-16

.

REV.-A

REQUIRED ADJUSTMENT ITEMS

If you have replaced the printer mechanism, make the following adjustment in the specified sequence.

(1) Prlnthead drive voltage adjustment (Refer to section 4.4.)

3.2.5 Circuit Board Removal

This section describes how to remove the MAIN board and the POWER SUPPLY board.

3.2.5.1 MAIN Board Removal

W A R N I N G

When working with the MAIN board, take sufficient care in handling the battery. Carefully read the precautions in 3.1.1 before beginning the work.

CAUTION

● To minimize damage to connectors, pull the female connector slowly while holding down the

MAIN board.

● CN 17 and CN 18 are connected to FPC, which are different from ordinary connectors. Take special care in handling these connectors.

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step 2 ]

[Step 3]

Remove the printer mechanism. (Refer to section 3.2.4.)

Unscrew CCU Screw (M3 X 8) which fastens the GROUNDING PLATE, RIGHT to the HOUSING,

LOWER, and remove the GROUNDING PLATE, RIGHT and the COVER, MAIN BOARD.

[Step 4] Unscrew the 2 screws (C. B. S-TITE screw (M3 X 12)) which fasten the COVER, CONNECTOR,

UPPER to the HOUSING, LOWER, and remove the COVER, CONNECTOR, UPPER.

[Step 5] Disconnect the following connectors on the MAIN board: CN 19, CN5, CN6, CN4

[Step 6] Unscrew the 4 screws (C. B.B. screw (M3 X 12) X 3 and C.C. U. screw (M3 X 8) X 1)) which fasten the MAIN board to the HOUSING, LOWER, and remove the MAIN board.

HOU

C.B. B .C. U. Screw (M3x 8)

GROUNDING PLATE, l/F

MAIN B( lard

~ -

,

y’”

~

a!!!lh-d

C.B. B. Screw (M3 X 12)

C. B. S.-TITE Screws (M3 X 12)

,, ‘

JR, i..

.

Ihl

~yl-/y.yj ., .

4“, k

COVER CONNECTOR,

UPPER

~c”c”u” SGreW (M3xq

GROUNDING PLATE, RIGHT

““”- “ *CO’ERMAIN’OARD

+

Figure 3-16. MAIN Board Removal

3-17

REV.-A

A S S E M B L Y P O I N T S

●

If you have replaced the MAIN board, take the weight of the wasted ink drain ink tank and replace it if the weight exceeds 240g.

●

If you have replaced the MAIN board, reset the wasted ink tank replacement counter before making the following adjustments.

a

R E Q U I R E D A D J U S T M E N T I T E M S

If you have replaced the printer mechanism, make the following adjustment in the specified sequence.

(1) Printhead drive voltage adjustment (Refer to section 4.4.)

(2) Print position adjustment (Refer to section 4.5.2.)

3.2.5.2 POWER SUPPLY Board Removal

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step 2 ]

[Step 3]

Remove the printer mechanism. (Refer to section 3.2.4.)

Disconnect the connector CN4 on MAIN board.

[Step 4] Unscrew the 3 screws (C.B. B. screw (M3X 12) X 2 and C.C.U. screw (M3 X 8) X 1)) which fasten the POWER SUPPLY board to the HOUSING, LOWER, and remove the POWER SUPPLY board.

,,

C2 -’. ,.:

WS (M3 X 12)

PPLY Board

Figure 3-17. POWER SUPPLY Board Removal

3-18

REV.-A

3.2.6 HOLDER ASSY., INK CARTRIDGE Removal

[Step 1] Remove the housing. (Refer to section 3.2.1.)

[Step2] Remove the printer mechanism. (Refer to section 3.2.4)

[Step 3] Unscrew C.B.B. screw (M3X 12) which fastens the HOLDER ASSY., INK CARTRIDGE to the

HOUSING, LOWER to remove the HOLDER ASSY., INK CARTRIDGE together with the TORSION

SPRING, 3490 and the COVER, HOLDER, INK CARTRIDGE.

A$’”-o 1

HOLDER ASSY.,

INK CARTRIDGE

.+,

@ ‘“ f

- /

—

ING, LOWER

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

ASSEMBLY POINTS

Before attaching the HOLDER ASSY., INK CARTRIDGE to the HOUSING, LOWER, assemble the

TORSION SPRING, 3490 and the COVER, HOLDER, INK CARTRIDGE onto the HOLDER ASSY., INK

CARTRIDGE.

Figure 3-19. Assembling TORSION SPRING, 3490 and COVER, HOLDER, INK CARTRIDGE

3-19

REV.-A

3.2.7 Printer Mechanism Disassembly

This section describes how to disassemble the printer mechanism.

W A R N I N G

When working with the printer mechanism, take sufficient care in handling the ink. Carefully read the precautions in 3.1.1 before beginning the work.

3.2.7.1 Disassembly of PAPER HOLDING ASSY.

[Step 1] Remove the housing. (Refer to section 3.2.1.)

[Step 2] Remove the TORSION SPRING, 6750 (LEFT) from the hook on the left frame.

[Step 3] Remove the TORSION SPRING, 6750 (RIGHT) from the hook on the right frame.

[Step 4] Remove the TORSION SPRING, 6750 (LEFT)from the left hook of the PAPER HOLDING ASSY..

[Step 5] Remove the TORSION SPRING, 6750 (RIGHT) from the right hook of the PAPER HOLDING

ASSY..

[Step 6] Remove the two E-rings (4)thatfasten the PAPER HOLDING ASSY., and then remove the PAPER

HOLDING ASSY..

.,,, ,., , c

PAPER HOLDING ASSY.

TORSION SPRING, 6750 (LEFT)

‘igh’Frame*$;:

TORSION SPRING, 6750 (RIGHT)

Figure 3-20. Disassembly of PAPER HOLDING ASSY.

c’

!

,,,.~

G’

3-20

REV.-A

3.2.7.2 Disassembly of CAP ASSY.

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step2] Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 3] Unscrew the 3 screws (C.B.S. screw (M3x8)) which fasten the FRAME, STRENGTHEN LEFT, and remove the FRAME, STRENGTHEN RIGHT.

[Step 4] Unscrew C.B.B. screw (M3x8)which fastens the CAP ASSY. to the FRAME, FRONT, and remove the CAP ASSY..

[Step 5] Separate the tube of the PUMP ASSY. from the CAP ASSY..

CAP ASSY.

FRAME, STRENG THEN RIGHT I

C.B.S. Screws (M3 X 8)

C,B.B, Screw (M3 X

Figure 3-21. Disassembly of CAP ASSY.

3-21

REV.-A

3.2.7.3 Disassembly of PUMP ASSY. and CLEANER ASSY.

[Step 1]

[Step 2]

Remove the housing. (Refer to section 3.2. 1.)

Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 3]

[Step 4]

Remove the CAP ASSY.. (Refer to section 3.2.7.2.)

Remove the TUBE, SUPPLY, INK, from the PUMP ASSY..

[Step 5] Unscrew two screws (C.B.S. screw (M3X 8)) which fasten the PUMP ASSY. to the frame, and remove the PUMP ASSY..

[Step 6] Separate the CLEANER ASSY. from the frame.

/-

CAUT’*N ~

Never touch the rubber section of the CLEANER ASSY..

Screws (M3x8)

Figure 3-22. Disassembly of PUMP ASSY. and CLEANER ASSY.

3-22

REV.-A

3.2.7.4 FRAME, FRONT Removal

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step2] Remove the printer mechanism. (Refer to section 3.2.4)

[Step3] Remove the CAP ASSY.. (Referto section 3.2.7.2.)

[Step4] Remove the TUBE, SUPPLY, INK from the hook on the PUMP ASSY..

[Step 5] Remove the harness of the platen gap sensor from the clamp in the rear of the printer mechanism.

[Step 6] Unscrew C.B.S. screw (M3 X 8) which fastens the resistor to the rear of the printer, and remove the resistor.

[Step 7] Unscrew C.B.S. screw (M3 X 8) which fastens the FRAME, STRENGTHEN, RIGHT to the FRAME,

FRONT.

[Step 8] Carefully peel off FPC from the FRAME, FRONT. (FPC is adhered to the FRAME, FRONT with adhesive double coated tape.)

[Step 9] Unscrew two screws (C. B.S. screw (M3 X 8)) which fastens the FRAME, FRONT to the printer mechanism, and remove the FRAME, FRONT.

CBS. Screws (M3 X 8)

C.B.S. Screw (M3 X 8)

Figure 3-23. FRAME, FRONT Removal

F’RAME,

STRENGTHEN,

RIGHT

3-23

REV.-A

3.2.7.5 Carriage Motor (DC MOTOR, CR) Removal

[Step 1] Remove the housing. (Refer to section 3.2.1.)

[Step 2] Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 3]

[Step 4]

Remove the CAP ASSY.. (Refer to section 3.2.7.2.)

Remove the FRAME, FRONT. (Refer to section 3.2.7.4.)

[Step 5] Unscrew the 3 screws (C.B.S. screw (M3 X 8)) which fasten the MOUNTING PLATE ASSY.,

PULLEY, DRIVEN to the FRAME, FRONT, and remove the timing belt from the pulley.

[Step 6] Unscrew the 4 screws (C.C. screw (M3 X 12) X 3 and C.B.S. screw (M3 X 8) X 1 ) which fasten the carriage motor (DC MOTOR, CR) and the MOUNTING PLATE, MOTOR, CR, to the FRAME,

FRONT and remove the carriage motor together with the MOUNTING PLATE, MOTOR, CR.

[Step 7] Unscrew the 2 screws (CUP screw (M3 X 5)) which fasten the carriage motor to the MOUNTING,

PLATE, MOTOR, CR and remove the carriage motor from the MOUNTING, PLATE, MOTOR,C R .

C.C.

Screws (M3x8)

MOUNTING

PLATE ASSY.,

PULLEY,

DRIVEN

Timiny Belt

FRAME, FRONT

, ,.

C7 ,.

CR.

CARRIAGE MOTOR DAMPER

-- MOUNTING PLATE, MOTOR, CR

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

ASSEMBLY POINTS

When attaching the carriage motor to the MOUNTING PLATE, MOTOR CR be sure to set the motor in the correct attitude. Note the direction of the cord shown in Figure 3-24.

REQUIRED ADJUSTMENT ITEMS

If you have replaced the carriage motor, make the following adjustment

●

Timing belt tension adjustment (Refer to section 4.3.)

-

. . . .

3-24

REV.-A

3.2.7.6 Disassembly of Carriage

[Step 1]

[Step 2]

Remove the housing. (Refer to section 3.2. 1.)

Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 3] Remove the printhead. (Refer to section 3.2.2.)

[Step 4]

[Step 5]

[Step 6]

Remove the CAP ASSY.. (Refer to section 3.2.7.2.)

Remove the FRAME, FRONT. (Refer to section 3.2.7.4.)

Remove the HOLDER, CABLE, PRINT HEAD which fastens FPC to the FRAME, FRONT, and release one end of the FPC.

[Step 7]

[Step 8]

Unscrew the 3 screws (C.B.S. screw (M3 X 8)) which fasten the MOUNTING PLATE ASSY.,

PULLEY DRIVEN to the FRAME, FRONT, and remove the timing belt from the MOUNTING

PLATE ASSY., PULLEY DRIVEN and pulley of CR motor.

Remove the 3 FLANGE NUT (M4) which fasten the SHAFT, CR, GUIDE, MAIN and SHAFT,

CR, GUIDE, SUB to the FRAME, FRONT, and then remove the carriage together with the

SHAFT, CR, GUIDE, MAIN and SHAFT, CR, GUIDE, SUB.

Timing Belt

C.B. S Screws (M3 X B)

+

FLANG NUT (M4) w ‘ p i /

FPC \\ ‘)= PLAIN WASHER

FRAMEFR

‘Wk:::\spR’NG

\

\

SPACER, CR,

GUIDE, SUB

-?

HOLDER, CABLE, LEVER, PARALLEL, ADJUST

PRINT HEAD e

, . ,’

~<+ FLANGE NIJT (M4)

Figure 3-25. Disassembly of Carriage (1)

[Step 9] Remove the 2 screws (C.C. screw (M2.5 X6)) which fasten the encoder to the carriage.

[Step 10] Remove the CABLE ASSY., HEAD from the carriage.

[Step 1 1] Remove the timing belt from the carriage.

E

AD

Figure 3-26. Disassembly of Carriage (2)

3-25

REV.-A

~

‘ss’”6”

‘“’N’s

When engaging the timing belt to the carriage, make sure that 3 grooves can be seen at the end of the belt as shown in Figure 3-27.

1

1

,H

I

: t

Timing Belt

. . .

.’,

3 grooves

Figure 3-27. Engaging Timing Belt

REQUIRED ADJUSTMENT ITEMS

If you have reassembled the carriage, make the following adjustment in the specified sequence.

(1) Timing belt tension adjustment (Refer to section 4.3.)

(2) Platen gap adjustment (Refer to section 4. 1.)

(3) Platen gap adjustment (Refer to section 4.2.)

(4) Printhead slant adjustment (Refer to section 4.5.1)

(5) Print position adjustment (Refer to section 4.5.2) c.,

L

,.,.

“;’ /j

3-26

REV.-A

3.2.7.7 STEPPING MOTOR, PF Removal

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step2] Remove the printer mechanism. (Refer to section 3.2.3)

[Step 3] Unscrew the CUP screw (M3X8) and the C.B.S. screw (M3X8) which fasten the STEPPING

MOTOR, PF to the FRAME, SUB, RIGHT, and remove the STEPPING MOTOR, PF.

STEPPING MOTOR, PF

\ CUP Screw (M3x8)

A., ‘~ , ~ ,

>.;

‘d d

GHT

“ \ f

C.B.S. Screw (M3 X 8)

P

Figure 3-28. STEPPING MOTOR, PF Removal

3.2.7.8 STEPPING MOTOR, TOP EDGE HOLDER Removal

[Step 1] Remove the housing. (Refer to section 3.2.1.)

[Step 2] Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 3] Unscrew the 2 screws (C.B.S. screw (M3X8)) which fasten the STEPPING MOTOR, TOP EDGE to the right frame and remove the STEPPING MOTOR, TOP EDGE HOLDER.

TOP EDGE

C.B.S. Screws (M3x8)

Figure 3-29. STEPPING MOTOR, TOP EDGE HOLDER Removal

3-27

REV.-A

3.2.7.9 Disassembly of PLATEN ASSY.

[Step 1] Remove the housing. (Refer to section 3.2.1.)

[Step 2] Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 3] Remove the CAP ASSY.. (Refer to section 3.2.7.2.)

[Step 4] Remove the FRAME, FRONT. (Refer to section 3.2.7.4.)

[Step 5] Remove the PAPER HOLDING ASSY.. (Refer to section 3.2.7.1.)

[Step6] Unscrew the2screws (C. B. S.screw(M3X 8))which fasten the COVER, PLATEN tothe frame,

LEFT/RIGHT, and remove the COVER, PLATEN.

[Step 7] Remove the E-ring (3) which fixes the GUIDE, PAPER EJECT to the left frame and remove the

GUIDE, PAPER EJECT.

[Step 8] Unscrew the 2 screws (C.B.B. screw (M3X6)) which fasten the PAPER GUIDE ASSY.,

SUPPORT to the frame, LEFT/RIGHT, and remove the PAPER ASSY., SUPPORT.

[Step 9] Remove the PUMP ASSY. and the CLEANER ASSY.. (Refer to section 3.2.7.3.)

[Step 10] Unscrew C.B. screw (M2X4) which fastens the SENSOR SUB ASSY., PW to the TOP EDGE

HOLDER., and remove the SENSOR SUB ASSY., PW while separating the FPC (connected to the sensor) from the adhesive double coated tape.

[Step 11] Hook off the GROUNDING SPRING.

:

+

@

PAPER GUIDE ASSY.,

SUPPORT

C.B.B Screws (M3 x 6)

\~

TOP

HOL

ASS ing (3)

1

\

C.B.S. Screws

(M3x 8)

,w

Figure 3-30. Disassembly of PLATEN ASSY. (1)

3-28

REV.-A

[Step 12] Rotate the HOLDER, PLATEN, RIGHT and HOLDER, PLATEN, LEFT which fasten the PLATEN

ASSY. to the frame, LEFT/RIGHT, and remove the PLATEN ASSY..

HOLDER, PLATEN, LEFT/RIGHT

Figure 3-31. Disassembly of PLATEN ASSY. (2)

ASSEMBLY POINTS

When assembling the GUIDE, PAPER EJECT be sure to hook the TORSION SPRING 700 to the

GUIDE PAPER EJECT.

When attaching the SENSOR SUB ASSY., PW make sure the adhesive double coated tape is completely covered by FPC.

Before setting the platen, set up the other parts as shown in the figure below.

Take the alignment of the HOLDER, PLATEN, RIGHT and HOLDER, PLATEN, LEFT.

Figure 3-32. Aligning HOLDER, PLATEN

3-29

REV.-A

I

REQUIRED ADJUSTMENT ITEMS

If you have reassembled the carriage, make the following adjustment in the specified sequence.

(1) Timing belt tension adjustment (Refer to section 4.3.)

(2) Platen gap adjustment (Refer to section 4. 1.)

(3) Platen gap adjustment (Refer to section 4.2.)

(4) Printhead slant adjustment (Refer to section 4.5.1)

(5) Print position adjustment (Refer to section 4.5.2)

,.

.!.

C2

!

c..-\,..

.“

3-30

REV.-A

3.2.7.10 Disassembly of PAPER GUIDE

IStepl] Remove thehousing. (Refer to section 3.2.1.)

[Step2] Remove the printer mechanism. (Refer to section 3.2.4)

[Step3] Remove the CAP ASSY.. (Refer to section 3.2.7.2)

[Step4] Remove the FRAME, FRONT. (Refer to section 3.2.7.4)

[Step5] Remove the PAPER HOLDING ASSY.. (Refer to section 3.2.7.l)

[Step6] Remove the PLATEN ASSY.. (Refer to section 3.2,7.9)

[Step7] Remove the STEPPING MOTOR, TOP EDGE HOLDER. (Referto section 3.2.7.8)

[Step8] Unscrew the 3screws(C.B.S. screw (M3X8)X2and C.B.S. screw (M2.5X6)Xl)) which fasten the FRAME ASSY., LEFT, and remove the FRAME ASSY., LEFT.

[Step 9] Remove the ROLLER, ASSY., DRIVE.

ROLLER ASSY., DRIVE

X 6)

Figure 3-33. Disassembly of PAPER GUIDE (1)

[Step 10] Unscrew the 3 screws (C. B.S. screw (M3X8) X2 and C.B.S. screw (M2.5X6) X 1)) which fasten the FRAME ASSY., RIGHT, and remove the FRAME ASSY., RIGHT.

[Step 1 1] Slide the PAPER GUIDE toward the left and remove the PAPER GUIDE.

Figure 3-34. Disassembly of PAPER GUIDE (2)

3-31

REV.-A

A S S E M B L Y P O I N T S

When attaching the FRAME ASSY., RIGHT to the PAPER GUIDE, make sure the SHAFT, RELEASE of the PAPER GUIDE, RIGHT is set in the proper direction as shown below.

@

PAPER GUIDE

Figure 3-35. Direction of SHAFT, RELEASE

REQUIRED ADJUSTMENT ITEMS

If you have reassembled the carriage, make the following adjustment in the specified sequence.

(1) Timing belt tension adjustment (Refer to section 4.3.)

(2) Platen gap adjustment (Refer to section 4.1.)

(3) Platen gap adjustment (Refer to section 4.2.)

(4) Printhead slant adjustment (Refer to section 4.5.1)

(5) Print position adjustment (Refer to section 4.5.2)

I c. .

.“ , ,

,./”

3-32

REV.-A

3.2.7.11 Disassembly of FRAME ASSY., RIGHT

[Step 1] Remove the housing. (Refer to section 3.2. 1.)

[Step 2]

[Step 3]

[Step 4]

[Step 5]

Remove the printer mechanism. (Refer to section 3.2.4.)

Remove the CAP ASSY.. (Refer to section 3.2.7.2.)

Remove the FRAME, FRONT. (Refer to section 3.2.7.4.)

Remove the STEPPING MOTOR, PF. (Refer to section 3.2.7.7.)

Remove the PAPER HOLDING ASSY.. (Refer to section 3.2.7. 1.) [Step 6]

[Step 7]

[Step 8]

[Step 9]

[Step 10]

Remove the PLATEN ASSY.. (Refer to section 3.2.7.9.)

Unscrew C.C. screw (M3 X 8) which fastens the FRAME, SUB, RIGHT, and remove the FRAME,

SUB, RIGHT.

Remove the release lever from the FRAME ASSY., RIGHT.

Remove the INTERMITTENT GEAR and the SPUR GEAR (27) from the FRAME ASSY., RIGHT.

[Step 1 1]

[Step 12]

Remove the COMBINATION GEAR (8, 30) from the shaft (C) on the FRAME ASSY., RIGHT.

Remove the COMPRESSION SPRING (200), the PLAIN WASHER (10.3 X 0.5 X 18.7), and the SPUR GEAR (34.5) from the shaft (B) on the FRAME ASSY., RIGHT.

[Step 13] Remove the COMPRESSION SPRING (200), the PLAIN WASHER (8 X 0.5 X 15), and the SPUR

GEAR (34.5) from the shaft (A) on the FRAME ASSY., RIGHT.

Shaft (C)

)

B, RIGHT c

Figure 3-36. Disassembly of Frame Assembly, RIGHT

B)

3-33

REV.-A

ASSEMBLY POINTS

When attaching the release lever to the FRAME ASSY., RIGHT, make sure that all the teeth of the gap gear are fully engaged with the teeth of the release lever.

I

@

H-

Release Lever

I

INTERMITTED

Gear Posifien

Figure 3-37. Setting Release Lever

REQUIRED ADJUSTMENT ITEMS

If you have reassembled the carriage, make the following adjustment in the specified sequence.

(1) Timing belt tension adjustment (Refer to section 4.3.)

(2) Platen gap adjustment (Refer to section 4. 1.)

(3) Platen gap adjustment (Refer to section 4.2.)

(4) Printhead slant adjustment (Refer to section 4.5.1)

(5) Print position adjustment (Refer to section 4.5.2)

I

,: Z.,..

c c, \,....

3-34

3.2.7.12 Disassembly of TRACTOR ASSY.

[Step 1] Remove the TRACTOR GEARS (left/right) attached on the SHAFT, TR, DRIVE, and remove the

FRAME, TR, (left/right).

[Step 2] Remove the E-rings (6) attached on the SHAFT, TR, DRIVE, and remove the tractors (left/right).

FRAME, TR, LEFT

TRACTOR GEAR

\

/

,,../”

<..,

....,,

.,.

I

LEVER, Th, RIGHT

Figure 3-38. Disassembly of Tractor Assembly

I

When attaching the tractor to the SHAFT, TR, DRIVE, make sure that the reference marks meet each

r_--AssEMBLypO’NTs

Figure 3-39. Tractor Set Position

3-35

CHAPTER 4

ADJUSTMENTS

4.1 PLATEN GAP PARALLELISM ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 PLATEN GAP ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.3 TIMING BELT TENSION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4 . 4 P R I N T H E A D D R I V E V O L T A G E A D J U S T M E N T . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

4.5 PRINT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4.5.2 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4.6 VOLUME VR1 ADJUSTMENT ON MAIN BOARD . . . . . . . . . . . . . . . . . . . . . . . 4-10

REV.-A

LIST OF FIGURES

Figure 4-1. Setting of Dial Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Figure 4-2. Platen Gap Parallelism Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Figure 4-3. SHAFT, CR, MAIN Installation Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Figure 4-4. Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Figure 4-5. Timing Belt Tension Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Figure 4-6. Notice Sheet on Spare Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Figure 4-7. Jumper Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Figure 4-8. Print Check Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Figure 4-9. Head Inclination Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

LIST OF TABLES

Table 4-1. Head Drive Voltage and Jumper Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-i

REV.-A

This chapter describes the various adjustments you should make after you disassemble or replace any parts or components that require adjustment. Needless to say, you should also make adjustment in any case if the printer does not function properly or print quality is not good enough.

Other conditions that require adjustment are described in this chapter.

W A R N I N G

Disconnect the power supply cable from the printer whenever you work with the printer. (Unless otherwise specified)

4.1 PLATEN GAP PARALLELISM ADJUSTMENT

This adjustment is to make the distance between the platen and the printhead (platen gap) uniform at column 1 and column 136 (column 80 in case of 80-column printer). Since it has already been adjusted in the assembling line before shipment, you need not adjust it. But if you have changed the setting of

LEVER, PARALLEL, ADJUST when repairing this printer, you should make this adjustment.

[Step 1] Remove the printhead. (Refer to section 3.2.2.)

[Step 2] Install the dial gauge base to the carriage.

[Step 3] Set the dial gauge to the dial gauge base (# F590), and touch the probe to the platen so that the long needle indicates 15-20 divisions on the scale. Then fix the dial gauge (# E603) to the dial gauge base with a hexagonal screw.

/

Platen

Screw

Probe

Dial Gauge Base dle

Long Needle

Figure 4-1. Setting of Dial Gauge

4-1

REV.-A

[Step 4] Adjust the LEVER, PARALLEL, ADJUST so that the long needle of the dial gauge indicates a constant value at any point on the platen with an allowance of 3 divisions (0.03 mm) when you move the carriage to the left and right.

/’-

Carriage

SHAH, CR, MAIN

LEVER, PARALLEL, ADJUST

Figure 4-2. Platen Gap Parallelism Adjustment

[Step 5] Remove the dial gauge and the dial gauge base.

[Step 6] Install the printhead to the carriage. (Refer to section 3.2.2.)

NOTE: Be sure to adjust the platen gap (Refer to section 4.2) after this adjustment.

4.2 PLATEN GAP ADJUSTMENT

This adjustment is to make the distance between the platen and the printhead 1.00&0.05mm. If this adjustment is not performed properly, print quality will be degraded. This adjustment is required when you loosened the flange of the shaft, CR, MAIN or replaced the printhead.

L

I

CAUTION

When making this adjustment, do not allow the clearance gauge to touch the nozzles of the head.

They are quite fragile.

I

[Step 1] Slightly loosen the FLANGE NUT (M4) of the SHAFT, CR, MAIN, and check the installation direction of the SHAFT, CR, MAIN.

; “, \

. c

.,

SHAFT, CR, MAIN

Figure 4-3. SHAFT, CR, MAIN Installation Direction

4 - 2

REV.-A

[Step2] Insert the thickness gauge (exclusively made by EPSON) between the platen and the printhead, and rotate the SHAFT, CR, MAIN so that the head is pressed lightly against the head. When rotating the SHAFT, CR, MAIN, you can make use of the notch at the right side of the shaft.

Platen o

\

1.00 mm &O.05 mm

T

(x ~

SHAFT, CR, MAIN

Prmthead and Carriage

Figure 4-4. Platen Gap Adjustment

[Step 3] Set the adjust lever to the normal paper printing position and tighten the FLANGE NUT(M4).

[Step 4] Pull out the thickness gauge. If the thickness gauge does not come off easily, loosen the

FLANGE NUT (M4) again and go back to Step 2.

[Step 5] Apply Neji-lock to the FLANGE NUT (M4).

NOTE: Be sure to perform printhead slant adjustment (Refer to section 4.5.1) after the platen gap adjustment.

4-3

REV.-A

4.3 TIMING BELT TENSION ADJUSTMENT

This adjustment is to change the tension of the timing belt to a proper level. If this adjustment is not performed properly, bi-directional printing settings will be interfered.

This adjustment is required when you loosened the timing belt for disassembling or assembling the printer or when the bi-directional print position cannot be aligned.

[Step 1] Center the carriage.

[Step 2] Loosen the 3 screws (C.B.S. screw (M3X8))attachin9 the MOUNTING PLATE ASSY., PULLEY,

DRIVEN to the frame.

[Step 3] Engage the tensiOn gauge to the hook of the MOUNTING PLATE ASSY., PULLEY, DRIVEN and adjust the belt tension. Tension value: 1,500 * 1009

PULLEY, DRIVEN

Figure 4-5. Timing Belt Tension Adjustment

... . .

0

4-4

REV.-A

4.4 PRINTHEAD DRIVE VOLTAGE ADJUSTMENT

Printhead drive voltage of each printhead should be adjusted individually, because all printheads are not exactly of the same characteristics.

If it is not adjusted properly, print quality will be degraded. This adjustment is required when the printhead or the printer mechanism is replaced. It is also required when the MAIN board is replaced.

The voltage for each printhead is determined by measuring the characteristics of each printhead during the production line. You can realize this voltage by setting the jumper located on the MAIN board.

[Step 1] Remove the printer mechanism. (Refer to section 3.2.4.)

[Step 2] Check the printhead drive voltage in one of the following ways.

(1) When only the MAIN board is replaced:

Remove the printhead from the carriage and check the head drive voltage printed at the bottom, and then put it back onto the carriage.

(2) When the printhead is replaced:

Check the head drive voltage printed at the bottom of the printhead.

(3) When the printer mechanism is replaced:

Check the head drive voltage printed on the notice sheet on the spare printer mechanism.

(See Figure below.)

I

/

Notice Sheet

I

\

Printer Mechanism Unit

Figure 4-6. Notice Sheet on Spare Printer Mechanism

[Step 3] Confirm the jumper settings (Jumper 5 and 6) referring to Table 4-1.

4-5

Table 4-1. Head Drive Voltage and Jumper Setting

Head Drive Voltage (V)

122.2- 123.7

120.7- 122.1

118.8- 120.6

117.1 - 118.7

115.5- 1 1 7 . 0

A

B

Jumper 5 Setting x

Y z x

Y

Jumper 6 Setting

1 1 3 . 8 - 1 1 5 . 4 z

1 1 2 . 4 - 1 1 3 . 7

1 1 0 . 8 - 1 1 2 . 3

1 0 8 . 8 - 1 1 0 . 7

1 0 6 . 8 - 1 0 8 . 7 c

D z x

Y x

Y

105.3- 106.7

103.7- 105.2

102.0- 103.6

100.4- 101.9

)8.5 - 100.3

)7.0 - 9 8 . 4

)5.2 - 9 6 . 9

)3.6 - 95.1

)2.0 - 93.5

10.4 - 91.9

18.5 -90.3

6 . 8 - 8 8 . 4

5 . 0 - 8 6 . 7

3 . 0 - 8 4 . 9

F

H

E

G z x x

Y

Y z z x x

Y

Y z z

A

4-6

[Step4]

REV.-A

When only the MAIN board is replaced:

Set the jumpers (5 and 6) on the MAIN board according to the settings confirmed in Step

3, and install the main board to HOUSING, LOWER.

When either the printhead or the printer mechanism is replaced:

Set the jumpers (5 and 6) on the MAIN board according to the settings confirmed in Step

3.

MAIN Board

Jumper

Figure 4-7. Jumper Setting

[Step5]

[Step6]

[Step7]

Connect a dummy resistor (20. OKohm~ 1 %) (#F59 1) to connector CN 16 on the MAIN board.

Set the digital multi-meter to the test terminal TP3(+) and TP4(–) on the MAIN board.

Connect the control panel to CN 19 and short-circuit the pin no. 1 and no.3 of the connector

CN2 on the control panel. (Refer to section 5.1 for the details.)

Turn on the power.

[Step8]

[Step9] Adjust the volume VR2 on the MAIN board until the digital multi-meter indicates the specified voltage with an allowance of &O.5V.

[Step 10] Turn off the power.

[Step 11] Stop short-circuiting CN2 on the control panel, and remove the control panel from the MAIN board.

[Step 12] Remove the dummy resistor and the multi-meter from the MAIN board.

[Step 13] Install the printer mechanism.

4-7

REV.-A

4.5 PRINT ADJUSTMENT

The print adjustment can be divided into the printhead inclination adjustment and print position adjustment. These adjustments can be performed by running the special program on the personal computer (EPSON PC/EQUITY or 100% IBM PC compatible machine) connected to the printer.

4.5.1 Printhead Slant Adjustment

If the printhead is not installed at the right angle to the carriage, the characters will not be printed at the right angle.

This adjustment is performed to correct the installation angle of the printhead.

When you reinstall the printhead or when the characters printed are not at the right angle, you should perform this adjustment by turning the PIN, ADJUST on the carriage while checking the output.

I

CAUTION

When you turn the PIN, ADJUST for inclination adjustment, first loosen the screw on the righthand side to unfasten the printhead, or the PIN, ADJUST may be damaged.

1

[Step 1]

[Step

2]

[Step 3]

[Step 4]

[Step 5]

[Step 6]

[Step 7]

[Step 8]

[Step 9]

Load 15-inch continuous paper (for 136-column printer) or 10-inch continuous paper (for

80-column printer) to the front push tractor.

Open the upper case and set the control panel so that CASE OPEN will not be detected. (Refer to Section 5.1 for the details.)

Connect the printer to the personal computer and turn on the printer power.

Turn on the power for the personal computer and start the adjustment program (Program name: F30B01 A (GW-BASIC)).

When “CHANGE DATE?” is displayed on the screen, enter N.

When “ADJUST... 1, RESET...2° is displayed, select “ADJUST” by entering “ 1“.

When “80 COLUMN... 1, 136 COLUMN...2° is displayed, select 80 column or 136 column for your machine.

When “BI-D...1, HEAD TILT...2, END...E” is displayed, select “HEAD TILT” by entering “2”.

When “PRINTER No.?” is displayed, enter the applicable printer number and press the return key.

(a), press the return key to print the final check pattern and finish the adjustment. If it looks like (b) or (c), continue the following steps.

—

“.,

(a) Acceptable

/ \

/

(b) Not acceptable

Figure 4-8. Print Check Pattern

\

(c) Not acceptable

4-8

.“. ,., c

-!

REV.-A

[Step 1 1] Center the carriage and loosen the screw (fastening the printhead)on the righthand side. Then, holding the head with the hand, turn the PIN, ADJUST. The PIN, ADJUST can be turned to

5 different positions.

inthead Fixed Screw

PIN, ADJUST

Figure 4-9. Head Inclination Adjustment

[Step 12] Turn the PIN, ADJUST to a proper position and tighten the screw loosened in Step 10.

[Step 13] Press the SPACE key and print the check pattern again. If the check pattern is acceptable, press the return key to print the final check pattern and finish the adjustment. If not acceptable, go back to Step 12.

4.5.2 Print Position Adjustment

This adjustment is performed on the control circuit to compensate the deviation of print position, which may be caused by the different printing speeds due to the parts tolerance of the printer mechanism, and the deviation of print timing between odd-numbered lines and even-numbered lines in bi-directional print. This printer stores the compensation-related data in EEPROM on the MAIN board. You should perform this adjustment in the following conditions.

●

The MAIN board is replaced.

“ The cartridge replacement counter is cleared, i.e. the contents of EEPROM is cleared.

. The printer mechanism is replaced.

“ The timing belt is removed or loosened.

“ The bi-directional print position is not aligned.

[Step 1] Load 15-inch continuous paper (for 136-column printer) or 10-inch continuous paper (for

80-column printer) to the rear push tractor.

[Step 2] Connect the printer to the personal computer and turn on the printer power.

[Step 3] Turn on the power for the personal computer and start the adjustment program (Program name: F30B01 A (GW-BASIC)).

[Step 4] When “ACHANGE DATE?” is displayed on the screen, enter N.

[Step 5] When “ADJUST... 1, RESET...2° is displayed, select “ADJUST” by entering “1”.

4-9

REV.-A

[Step 6] When “’80 COLUMN...1, 136 COLUMN...2° is displayed, select 80 column or 136 column for your machine.

[Step 7] When “BI-D...1, HEAD TILT...2, END...E” is displayed, select ‘“BI-D” by entering “l’”.

[Step 8] When “PRINTER No.?” is displayed, enter the applicable printer number and press the return key.

[Step 9] Print the odd-numbered lines at SPEEDO and even-numbered lines at SPEED1 both in uni-directional print mode. In SPEED 1 mode, the compensation value of ‘“-4” is automatically selected.

NOTE:

The compensation value “-4” is a specific value judged from our experience. The plus value means that the print position will be shifted to the right, while the minus value to the left.

[Step 10] If the vertical elements in even-numbered lines and odd-numbered lines are aligned, press the return key and go to Step 11. If they are not aligned, enter another value and press the return key to check the output. Continue this procedure until they are aligned.

[Step 1 1] When the return key is pressed in Step IO, vertical lines are printed at SPEEDl in bi-directional print mode. The compensation value of “5” is automatically selected.

NOTE:

The compensation value “5” is a specific value judged from our experience. The plus value means that the print position will be shifted to the right, while the minus value to the left.

[Step 12] If the vertical elements in even-numbered lines and odd-numbered lines are aligned, press the return key and go to Step 13. If they are not aligned, enter another value and press the return key to check the output. Continue this procedure until they are aligned.

[Step 13] When the return key is pressed in Step 12,vertical Iines are printed at SPEED2 in bi-directional print mode. The compensation value of “7” is automatically selected.

NOTE: The compensation value “7” is a specific value judged from our experience. The plus value means that the print position will be shifted to the right, while the minus value to the left.

[Step 14] If the vertical elements in even-numbered lines and odd-numbered lines are aligned, press the return key and go to Step 15. If they are not aligned, enter another value and press the return key to check the output. Continue this procedure until they are aligned.

[Step 15] When the return key is pressed in Step 14, the printing will be performed at each SPEED and the adjustment is finished.

4.6 VOLUME VRI ADJUSTMENT ON MAIN BOARD

● which controls the carriage motor. Since VR 1 has already been adjusted before shipment, additional adjustment is not required.

However, when the gate alley, E05A48 is replaced, adjust VR 1 in the following steps.

[Step 1] Connect the oscilloscope to the 7th pin of the gate array, E05A48.

[Step 2] Turn on the printer power.

[Step 3] Verify that the printhead is capped and that the carriage motor is not rotating.

[Step 4] Turn VR1 until 1 cycle of the continuous waveform in the oscilloscope shows 10* O. O5PS.

4 - 1 0

CHAPTER 5

TROUBLESHOOTING

5.3 REPAIR OF POWER SUPPLY BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

5.5 REPAIR OF THE PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

REV.-A

LIST OF FIGURES

Figure 5-1.

Troubleshooting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIST OF TABLES

Table 5-1.

Resistance of Motor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 5-4. Symptoms and Reference Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-5. Repair of Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

S.i

REV.-A

5.1 OVERVIEW

The task of troubleshooting is not an easy job, even a single trouble may exhibit a variety of symptoms.

Figure 5-1 show a flowchart, by which you can easily determine the cause of trouble.

I UnitRepla@rnent I

I

Service Check List

I

I-=7-l

Figure 5-1. Troubleshooting Procedure

Table 5-1 and 5-2 lists the information related to the troubleshooting operation.

Unit Name

Carriage motor pauer-feed motor

Top edge holder motor

Pump motor

Table 5-1. Resistance of Motor Coil

Specifications

Coil Resistance 7.8ohms f 10% at 20 degrees C

Coil Resistance 19.5ohms * 7% at 25 degrees C

I Coil Resistance 790hms & 10% at 25 degrees C

Coil Resistance 1 17ohms

Buzzer

Table 5-2. Error Display

LED Status

All LEDs blink

5 times of O. l-second beep with

O. l-second intervals

5 times of 0.5-second beep with

0.5 second intervals

3 times of O. l-second beep with

0.1 -second intervals

3 times of O. l-second beep with

O. l-second intervals

PAPER OUT LED lights up

INK END LED lights up

Error Description

Weasted ink drain tank overflow

Cover open

Carriage malfunction paper empty

Ink end or ink cartridge empty

I

I

5-1

REV.-A

In order to check the waveforms of the MAIN board, you can use the extension cable provided for this printer. You can remove the MAIN board from the lowercase and still check its waveforms by connecting the board to the printer mechanism with these cables.

The following table shows extension cables and connecting points.

CN 11

CN 18

CN 17

CN 13

CN 15

CN 12

CN 14

Connector on MAIN

Board

CN5

CN6

CN7

CN8

CN 10

CN9

Table 5-3. Extension Cables

Connecting Point on

Printer Mechanism

Extension Cable

Ink cartridge sensor #F578

#F578 Ink-and sensor

PG sensor #F578

/ IWeaseflractorsensor I #F578

Part No.

1011025

1011025

1011025

\ 1011025

I Top edge sensor I #F579

I Paper-end sensor (front) I #F578

Paper-end sensor (rear)

Printhead

#F579

I Printheaci

TE motor

I 1011024

I 1011025

1011024

#F574, and #F575 1011027

I ## R5i16,

and #F577

] 1 0 1 1 0 2 6

#F580 1011023

, CR motor

Pump motor

Paper-feed motor

# F 5 9 4

#F578

#F580

B765 1054101

1011025

1011023

I

I

I

I in order to make the printer operate with the case-open sensor removed, you can cut out the male connector from the extension cable #F579 and short-circuit Line 1 and 3, and then insert it to the 3-pin connector on the control panel.

At the same time, cut out the female connector from the extension cable #E594 and short-circuit Line

1 and 2, and then connect it to the connector connected to the resistor coming form the printer mechanism.

. . .

{

5-2

REV.-A

5.2 REPAIR BY UNIT REPLACEMENT

When a problem occurs, you can separate a particular unit that is responsible for the particular problem by referring to the symptoms listed below. Refer to Table 5-4, identify what the problem is, and then perform the checks according to the corresponding flowchart.

Table 5-4. Symptoms and Reference Pages

Contents Symptom

Printer fails to operate at time “ Control panel LEDs do not light up.

of power on.

. Carriage and pump do not operate.

Error is detected.

o Error is indicated by LED or buzzer.

Print failure occurs during self o Printing is not performed.

test.

“ Faulty printing - some of the dots are not printed.

“ Bad print quality (density, etc.)

Paper is not fed normally.

o No paper is fed.

“ Feeding is irregular.

“ Paper jam occurs.

Control panel does not func“ When “LF” or “FF” switch is pressed in PAUSE tion normally.

mode, no paper is fed.

. Each function cannot be controlled through control panel.

“ PAUSE mode cannnot be selected.

o

DIP SW cannot be set.

The printer does not function . Self-test is executed correctly, however print data normally in on-line mode.

from the host computer is not printed correctly.

o When printer is operated, an error occurs to the host computer.

Reference Page

5-4

5-5

5-7

5-8

5-9

5-10

5-3

REV.-A

(1) Printer fails to operate at time of power on.

Use the correct input voltage.

Check the outpui volta e of the power

Yes

Replace the fuse and pull out CN4 on the

MAIN board.

No

No

Replace the MAIN board.

“Yes

●

Replace the power board.

7

ND

No

1

Replace the printer mechanism.

I

ND

T7

5-4

(2) Error is detected.

Read the error message displayed

(Refer to table 5-2)

~

Yes

A

A

Check the cable connection on the control panel.

Connect the cable

Yes

Turn off the power supply and try to move the carriage manually.

Yes Yes

4

I

I

Replace the MAIN board.

I

I

No

Yes

Replace the control Panel.

Replace the printer mechanism.

No

●

+

Yes

END

*

5-5

Wasted ink drain tank overflow.

I

Replace the wasted ink drain tank

57

‘r’es

Replace the HOLDER

ASSY., INK CARTRIDGE.

Yes

5-6

(3) Print failure occurs during self test.

Set the adjust lever in the correct position and execute self-test.

~

No

Yes

< dot is missing or print density is incorrct. ) v

Yes

Press the CLEANING

SW

Replace the printhead,

I

No b

Yes

Excute the adjustment for printhead slant and Bi-d print.

Replace the printer mechanism.

I

connected correctly ?

. .

Yes

No

I

Connect each connector correctly.

I

No

●

Yes v

ND

* v 4

END

END

+

5-7

REV.-A

(4) Paper is not fed normally.

I f+ power

< turn smoothly ?

Yes

Replace the MAIN board.

L anfirm that there are no stray pieces of paper or anything else nothing abnormal within the paper

the paper path. Remove any stray pieces or other foreign objects

I

Replace the printer mechanism.

(!) No

A

No b

Replace the printer mechanism.

‘

ND

*

<

Was the paper feed No motor coil damaged by overheating ?

Yes

*

Replace the MAIN board.

6 v

I ID r

AI

/

.-

63

:’..

,,

5-8

(5) Control panel does not function normally.

No

Yes Connect the control panel cable correctly,

No

4

Replace the control panel.

4

Yes

No

Yes

ND

F7

Replace the MAIN board.

v

ND ND

*

REV.-A

REV.-A

(6) The printer does not function normally in on-line mode.

Execute self-test.

T

Refer to other sedon for troubleshooting.

Parallel

Check the setup values between printer and host computer.

Yes

Replace option interface board.

No

<

Replace the interface cable between printer and host computer.

4

Yes

END

*

No

I

Replace the MAIN board.

ND

*

No

Adjust the setup vakIe$$.

. . .. . . .. .

.)

> c,>,.,,..

:,’

@

5-1o

REV.-A

5.3 REPAIR OF POWER SUPPLY BOARD

This section describes the problems related to the power supply board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component. Check these values and take the appropriate action.

Table 5-5. Repair of Power Supply Board

5-11

REV.-A

Symptom Conditon

The printer +5V line is does not opdead.

crate at all.

Table 5-5. Repair of Power Supply Board (Cont.)

Cause

+35V line is dead.

IC51 is dead.

Checkpoint

Check the +35V line.

Check the oscillation waveform and switching waveform of IC51.

Solution

Replace

IC51 .

+

1 f

T/

4ttt-

A

{

./ /

+t+t

/–

P

3

2V

*

20

$s

Oscillation Waveform (IC51, pin 5)

I

-

“d

-

I

\

!’i+l+

Q51 or Q52 is dead.

$

1

1

I mk’

*

Switching Waveform (IC51, pin 8)

Replace

Q51 or

Q52.

5-12

REV.-A

5.4 REPAIR OF MAIN BOARD

This section describes the problems related to the MAIN board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component. Check these values and take the appropriate action.

Table 5-6. Repair of Main Board

5-13

REV.-A

S y m p t o m I C o n d i t o n

The printer The CPU does not oPdoes not crate at ail.

operate.

.

Rcmair nf

““. ” - -.

..-~-..

M a i n B o a r d (Cont.)

-. . . . . . . . —-—- — . — ——. -—.

Cause Checkpoint

Either CG or

RAM is defective.

CPU is defective.

Check the oscillator signal at either pin 53 or

54 of the CPU.

Solution

Replace CG or RAM.

If signal is detected, replace CPU.

Otherwise replace

CR2.

-tttt+tu-l-l-l+-Hi+

& ii-i-t -l-t-i+ -m-t -l-H+

*

-t

I t

20ms I

c

:.,.,’)

*“

5-14

Symptom

The carriage does not operate normally.

Conditon

The carriage does not operate at all.

Table 5-6. Repair of the Main Board (Cont.)

Cause Checkpoint

IC 10 is defective.

Check the oscillator waveform at pins 27, 25,

32 and 31 of ICIO.

Solution

Replace

Ic 10.

ICI 7 is defective.

At IC 17, compare the waveform at pin 2 with that at pin 4.

Replace

Ic17.

5-15

REV.-A

,

““.

”

Ransir nf the M a i n B o a r d (Cont.)

w w. .. -~.-.. -. . . . .

5-16

Symptom Conditon

Table 5-6. Repair of the Main Board (Cont.)

Cause

The top edge holding mechanism does not operate normally.

TE motor ICI 2 is does not rodefective.

tate at all.

ICI 8 is defective.

The pump The pump does not opmotor does crate normally not rotate at all.

IC12 or

IC16 is defective.

Abnormal print in unline mode.

Data is not received normally.

ICI 2 is defective.

Check the output signal at pin 21, 22, 23 and

24 of IC 12.

Checkpoint

Check the output signal of IC 18.

Check the waveform at pin 1 and 2 of ICI 2 and pin 15 and 9 of IC 16.

Check the input/output signal of IC 12.

Solution

Replace

Ic12.

Replace

IC 18.

Replace

IC12 or 16.

Replace

Ic12.

5-17

REV.-A

5.5 REPAIR OF THE PRINTER MECHANISM

Troubles related to the printer mechanism procedures in Table 5-7.

should be repaired according to the troubleshooting

Symptom

The pump motor does not rotate.

Table 5-7. Repair of Printer Mechanism

Condition

The pump motor fails to rotate at time of power on.

Cause

The pump motor is defective.

Checkpoint

Check the coil resistance of the motor.

Solution

Foreign substances Manually drive the are lodged in the

Remove any for.

gear train connecteign substance.

gear in the mechanism.

ed to the pump motor to check if the motor rotates.

Replace the pump motor.

Ink is not absorbed Used ink does not or poorly absorbed.

go through the used ink tube during the cleaning operation.

The tube is not Check that the properly connected tube is properly to the cap.

The ink tube is damaged.

The cap is defective.

The pump is defective.

connected to the cap.

Set the tube

Check the ink tube Replace the tube.

visually.

Check for any defective part.

Replace the pump to see if this causes the ink to be absorbed normally.

properly.

Replace the head cap.

Replace the pump unit.

The printhead is defective.

Replace the printhead to see if this causes the ink to be absorbed normally.

Replace the printhead.

Remove any foreign substance.

rhe carriage motor The carriage motor Foreign substances Manually drive the

Aoes not rotate.

fails to rotate at time of power on.

are lodged in the gear in the timing belt to see if the carriage momechanism.

tor rotates.

The carriage motor Measure the coil is defective.

resistance of the

CR motor.

Replace the carriage motor.

e*.., , c

1

5-18

REV.-A

Symptom Condition

The carriage does The carrige motor not operate normalrotates, but the

Iy at time of power on.

carriage does not move.

(after the carriage has been manually centered prior to power on).

Cause

The pulley is defective.

The timing belt is defective.

The carriage moves to the left slightly and then stops.

Carriage movement is not smooth.

The encoder is defective.

Checkpoint

Check for broken or worn pulley.

Solution

Replace the driven pullely.

Check that the timReinsert the timing ing belt is properly belt.

inserted into the bottom of carriage.

Check the timing belt for any damage.

Replace the timing belt.

Check whether the Clean and carriage moves lubricate.

smoothly when moved manually.

Check tension of the timing belt.

Adjust tension of the timing belt.

Replace the encoder.

Printing is not performed.

The carriage moves to the left or right end, and then stops.

The carriage moves, but no printing is performed.

The ink end sensor Check the ink-end is defective.

sensor with a tester.

The head cable is disconnected.

Replace the ink end sensor.

Check the head caReplace the cable.

ble for disconnection.

The printhead is defective.

Replace the printhead.

Ink absorption is poor.

Replace the printhead to see if the printhead operates normally.

See “Ink is not absorbed” on the previous page.

REV.-A

Symptom

Abnormal printing.

Table 5-7. Re~air of Printer Mechanism (Cont.)

Condition

A particular dot is not printed.

Cause

Front of the printhead is not clean.

The head cable is disconnected.

Checkpoint Solution

Perform the cleaning operation.

Clean.

Check the head caReplace the cable.

ble for disconnection.

A dot is not printed occasionally.

The printhead is defective.

Front of the printhead is not clean.

Replace the printhead.

Check front of the printhead.

Replace the printhead.

Clean.

The expiration of the ink cartridge.

Check the ink cartridge for expiration.

Replace the ink canriege.

Insufficient contact Check whether the Plug the cale into of the head cable.

cable is properly the connector plugged into the properly.

connector.

Check the cleanliness.

Clean.

The printhead is defective.

Replace the printhead to see if this causes printing to be performed normally.

Replace.

Ink is poorly absorbed.

Check whether the See “Ink is not used ink goes Absorbed”.

through the used ink tube.

Check the platen gap.

Adjust the gap.

Printed characters are not aligned.

The platen gap is not adjusted.

Head inclination is not adjusted.

Adjust the head inclination.

The intervals between the characters are irregular.

abnormal.

Vertical line is not aligned.

The timing belt is defective.

damaged.

Head inclination is not adjusted.

Check that the timSet the timing belt ing belt is properly properly.

inserted into the bottom of carriage.

Tension of the timAdjust the tension.

ing belt is not adjusted.

Print at the sides is The paper gu de is Check the paper guide.

Adjust the head inclination.

Replace or reset the paper guide.

Adjust the head inclination.

5-20

Symptom

Paper is not fed normally.

Table 5-7. Repair of Printer Mechanism (Cont.)

Condition Cause Checkpoint

Top edge holding mechanism does not function properly.

Paper-feeding method cannot be changed.

Paper is not fed.

The TE motor is defective.

Release mechanism is defective.

Measure the coil resistance of the

TE motor.

Check the release mechanism.

Foreign substance are lodged in the paper path.

Paper feeding gears are defective.

Visually check the paper path.

Visually check the gears.

The paper-feed moMeasure the coil tor is defective.

resistance of the

PF motor.

Solution

Replace the TE motor.

Replace the defective parts.

Remove any foreign substance.

Replace defective gears.

Replace the PF motor.

5-21

c

“)

CHAPTER 6

MAINTENANCE

6.1 PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2 LUBRICATION AND ADHESIVE APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

REV.-A

LIST OF FIGURES

Figure 6-1.

How to Apply Adhesive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6-2.

Lubrication Points (l).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6-3.

Lubrication Points (2).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIST OF TABLES

Table 6-2. Lubrication Points

(Refer to Figure 6-2 to Figure 6-3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Table 6-3. Adhesive Application Points

(Refer to Figure 6-2 to Figure 6-3.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

&i

REV.-A

6.1 PREVENTIVE MAINTENANCE

Preventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as well as occasional vacuuming of the mechanism’s interior to remove dust and paper debris. After cleaning the unit, check that it is adequately lubricated (as described in Section 6.2, below). Before returning the printer to the customer, check that the printer operates normally.

W A R N I N G

Do not use thinner, trichloroethylene, or ketone-based solvents on the plastic components of the printer.

6.2 LUBRICATION AND ADHESIVE APPLICATION

Lubrication should be performed when mechanical noise of the printer exceeds a certain level or when disassembly or replacement of the printer is performed.

EPSON recommends that the printer be lubricated at the points as listed in Table 6-2. The two recommended lubricants are EPSON O-5, G-1 4, both of which have been tested extensively and found to comply with the needs of this printer. (Table 6-1 provides details about these lubricants.) Before applying a lubricant, be sure that the surface to be lubricated is clean. Do not apply too much lubricant, as this may dirty or affect the adjacent parts.

Adhesive application is necessary at the point listed in Table 6-3. Figure 6-1 indicates the point at which adhesive must be applied following disassembly or replacement. EPSON recommends Neji lock #2(G) adhesive. Do not let the adhesive overflow to adjacent parts when applying it.

Type

Oil

Grease

Adhesive

Table 6-1. Lubricants and Adhesive

Name Quantity Part No.

o-5

G-1 4

Neji lock #2 (G)

I

40 c c

40 gm.

1000 gm.

1 0 1 0 5 1 3

B70 1400001

B730200200

E: EPSON-exclusive product

E

E

E

Availability

Figure 6-1. How to Apply Adhesive

6-1

REV.-A

Ref. No.

(1)

(2)

(3)

(4)

(5)

Table 6-2. Lubrication Points (Refer to Figure 6-2 to Figure 6-3)

Lubrication Points

Sliding surface of the LEVER, RELEASE, SUB.

The left shaft of the ROLLER ASSY., DRIVER and the inner side of the

FRAME ASSY., LEFT.

HOLDER, PLATEN, RIGHT

HOLDER, PLATEN, LEFT

Carriage pad and CARRIAGE, SUB

Lubricant

G-1 4

G-14

G-1 4

G-1 4 o-5

Table 6-3. Adhesive Application Points (Refer to Figure 6-2 to Figure 6-3.) r

Ref. No.

I Adhesive Application Point No. of Points o

Screw fastening top edge assembly (1/4 of the perimeter) 2

3

@

Screw fastening SENSOR ASSY., PW (1/4 of the perimeter)

Timing belt (2 teeth)

@

1

Head fastening screw (right-side only) (1/4 of the perimeter) 1

@

@

I

@

LEVER, PARALLEL, ADJUST (1/4 of the perimeter)

FLANGE NUT (M4) of the lever G, ADJUST holder (1/4 of the perimeter) 1

1 e,., .:,t>. ,

6-2

Figure 6-2. Lubrication Points (1)

6-3

REV.-A

REV.-A

“L..]

Figure 6-3. Lubrication Points (2)

6-4

(-,

.

APPENDIX

A.1

A.2

A.3

CIRCUIT BOARD COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 4

A.4

A-7

A.5

A-26

LIST OF FIGURES

Figure A-1.

Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

F i g u r e A - 2 . C076 MAIN Board Circuit Diagram (Annotated) . . . . . .

A-7

F i g u r e A - 3 . C076 MAIN Board Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-8

F i g u r e A - 4 . C076 PSB Board Circuit Diagram (Annotated) . . . . . . . . .

A-9

F i g u r e A - 5 . C076 PSB Board Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 O

F i g u r e A - 6 . C076 PSE Board Circuit Diagram (Annotated) . . . . . . . . . .

A-1 1

F i g u r e A - 7 . C076 PSE Board Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 2

Figure A-8.

Control Panel Board Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 3

Figure A-9.

C076 MAIN Board Component Layout (Surface) . . . . .

A-1 4

Figure A-10. C076 MAIN Board Component Layout (Back Side).

A-1 5

Figure A-1 1. C076 PSB Board Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 6

Figure A-1 2. C076 PSE Board Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 7

Figure A-1 3. SQ-870 Exploded Diagram -1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 8

Figure A-1 4. SQ-870 Exploded Diagram -2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1 9

Figure A-1 5. SQ-870 Exploded Diagram -3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A - 2 0

Figure A-1 6. SQ-1 170 Exploded Diagram -1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-21

Figure A-1 7. SQ-1 170 Exploded Diagram -2... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-22

Figure A-18. SQ-1 170 Exploded Diagram -3... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A - 2 3

Figure A-1 9. SQ-870 Case Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-26

Figure A-20. SQ-1 170 Case Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-27

REV.-A

A-i

REV.-A

LIST OF TABLES

Table A-1.

Table A-2.

Table A-3.

Table A-4.

Table A-5.

Table A-6.

Table A-7.

CNBoard Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CN2 {C076 Main).......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CN3 (C076 Main).......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-2

A-3

A-3

Table A-8.

Table A-9.

Table A-10.

Table A-1 1.

Table A-12.

Table A-1 3.

Table A-14.

Table A-1 5.

Table A-16.

Table A-1 7.

Table A-18.

Table A-19.

Table A-20.

Table A-21.

CN12 (C076 MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-4

A-4

A-4

A-5

CN18 (C076 MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-5

Part No. Reference Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-4

A-24

A.ii

REV.-A

A.1 CONNECTOR SUMMARY

Figure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes the functions and sizes of the connectors.

I

Case Open Sensor

P

Control Panel

P

IE2

Printer Mechanism Model-47” 0/4760

~ GAP F/T EDGE PEF PER HEAD HEAD TE CR PM PF

I

I

I r - - - - - - - - - I

I

C A R T R I D G E :—

I

1 ---------A

I

CN5 CN6 CN7 CN8 CN1O CN9 CNI1 CN18 CN17 CN13 CN15

2P 2P 2P 2P 3P 2P 3P 26P 36P 6P 2P

MAIN BOARD

6P CN1

2P CN1 w

11P CN4 ml

I 1

36P

I r--’---l

I

, OPTION I/F:

I

, BOARD

I

- - - - 1

I

I

I

- - - - - - - - - - - - - - - - - - I

Parallel

I

I

Specific l/F ~

I

I

I

J

I

I

HOST COMPUTER

I

I

I

IE2: Ink Cartridge Sensor

GAP: Platen Gap

EDGE: Top Edge Sensor

PER:

TE:

PM:

PE Sensor (Rear)

TE Motor

Pump Motor

IE:

F/T:

CR:

PF:

Ink End Sensor

Friction/Tractor Sensor

PEF: PE Sensor (Front)

HEAD: Printhead

Carriage Motor

PF Motor

Figure A-1. Cable Connections

A-1

REV.-A

Board

C076 MAIN board

C076 PSB/PSE board

Control Panel

~oard

Table A-1. Board Connector Summarv

Connactor Function

CN 1

CN1O

CN 11

CN 12

CN 13

CN14

CN 15

CN 16

CN 17

CN 18

CN2

CN3

CN4

CN5

CN6

CN7

CN8

CN9

CN 19

CN20

Parallel interface

Optional interface card

Identity or font module

DC power input (C076 PSB/PSE board)

Ink cartridge sensor

Ink end sensor

PG sensor

Release sensor

Paper-end sensor (front)

Top edge sensor

Paper-end sensor (rear)

Pump motor

Top edge motor

Paper feed motor

Carriage motor

For adjustment

Printhead

Printhead

Control Panel

—

CN 1

CN3

CN 1

CN2

AC power input

DC power output (C076 MAIN board)

C076 MAIN board

Cover open sensor

Pins

3

3

2

6

6

2

2

2

2

2

36

36

60

11

2

2

36

26

16

2

2

11

16

3

A-2

No.

1

2

3

-

-

-

+ 5

+ 5

+ 5

4

5

6

7

8

9

10

11

12

13

14

15

16

-

-

-

0 TXD

0 READY

-

I

+ 5

+ 5

+ 5

RXD

NC

I

I

0 RST

0 INH

CMREQ

WRRDY i RDREQ

0 WR

0 RD

0 Cs

23

24

25

26

17

18

19

20

21

22

-

-

-

-

-

-

GND

GND

GND

GND

GND

GND

0 A3

0 A2

27 0 A l

28 0 AO

29 1/0 D7

30 1/0 D6

31 1/0 D5

32 1/0 D4

33 1/0 D3

34 1/0 D2

35 1/0 D1

36 1/0 DO

Table A-2. CN2 (C076 M A I N )

1/0 Signal Name Function

+ 5 VDC

+ 5 VDC

+ 5 VDC

+ 5 VDC

+5 VDC

+5 VDC

Transmit data

Ready to receive data

Receive data

No connection

Reset

Inhibit

Command request

Write ready

Read request

Write

Read chip select

Signal ground

Signal ground

Signal ground

Signal ground

Signal ground

Signal ground

Address bus bit 3

Address bus bit 2

Address bus bit 1

Address bus bit O

Data bus bit 7

Data bus bit 6

Data bus bit 5

Data bus bit 4

Data bus bit 3

Data bus bit 2

Data bus bit 1

Data bus bit O

Table A-3. CN3 (C076 M A I N )

No.

1/0 Signal Name Function

7

8

5

6

9

10

11

1

2

3

4

12

13

14

15

-

-

I

-

+ 5

+ 5

+ 5

ARE(3

0 CNT

0 PROG

0 RAM

0 CG

0 WR

0 CGA I 8

0 RD

0 CGA13

0 CGA I 4

0 RAM 14

0 CGA I 5

+5 VDC

+ 5 VDC

+ 5 VDC

Address request

MMI02

P-ROM chip select

RAM chip select

CG ROM chip select

Write strobe

CG address bit 17

Read strobe

CG address bit 13

CG address bit 14

RAM address bit 14

CG address bit 15

A-3

REV.-A

No.

Table A-3. CN3(C076 MAIN) (Cont.)

1/0 Signal Name Function

16

17

18

19

20

0

0

0

0

RAM 15

CGA16

RAM 16

CGA17

21

22

23

24

25

26

0 AO

0

0

0

A l

A2

A3

27

28

29

30

31

32

33

34

35

-

-

0 A4

0 A5

0 A6

0

0

-

-

A7

A8

+ 5

+ 5

GND

GND

36

37

38

39

GND

0 PROGAl 6

0 MREQ

0

0

PROGAl 5

PROGAl 4

40

41

0 CGA22

0 CGA21

0

0

CGA20

CGA I 9

42

43

0 PROGAl 3

0 RAMAl 3

0 A9 44

45

46

47

48

49

0 A lO

NC

0 Al 1

NC

0 Al 2

50 vo D7

51 1/0 D6

52 1/0 D5

53 1/0 D4

54 1/0 D3

55 1/0 D2

56 1/0 D1

57 1/0 DO

58 GND

59

60 -

GND

GND

RAM address bit 15

CG address bit 16

RAM address bit 16

CG address bit 17

Address bit O

Address bit 1

Address bit 2

Address bit 3

Address bit 4

Address bit 5

Address bit 6

Address bit 7

Address bit 8

+ 5 VDC

+ 5 VDC

Signal ground

Signal ground

Signal ground

Program address bit 16

Memory request

Program address bit 15

Program address bit 14

CG address bit 22

CG address bit 21

CG address bit 20

CG address bit 19

Program address bit 13

RAM address bit 13

Address bit 9

Address bit 10

Not connect

Address bit 11

Not connect

Address bit 12

Data bus bit 7

Data bus bit 6

Data bus bit 5

Data bus bit 4

Data bus bit 3

Data bus bit 2

Data bus bit 1

Data bus bit O

Signal ground

Signal ground

Signal ground

REV.-A

No.

1

4

5

2

3

6

7

8

9

10

11

Table A-4. CN4(C076 MAIN)

Signal Name Function

+ 5

+ 5

GND

GND

GND

GP

GP

GP

+ 3 5

+ 3 5

NC

+5 VDC

+5 VDC

Signal ground

Signal ground

Signal ground

Power ground

Power ground

Power ground

+35 VDC

+35 VDC

Not connect

Table A-5. CN5 (C076 M A I N )

No. I 1/0 \ Signal Name I Function

1

2 -

I IE2

GND

Ink cartridge sensor

Signal ground

No.

2

1

Table A-6. CN6 (C076 MAIN)

1/0 Signal Name Function

-

I E

GND

Ink end sensor

Signal ground

Table A-1 1. CN11 (C076 MAIN)

No.

1/0 Signal Name

1

2

3 -

-

I

LED

PE

GND

Function

+5 VDC

Paper-end sensor (R)

Signal ground

1

I

Table A-12. CN12 (C076 MAIN)

No.

!/0 Signal Name Function

1 0 P M +

I

2 0 PM-

Pump motor +

Pump motor -

Table A-13. CN13 (C076 MAIN)

No.

1/0 Signal Nama

I I

1

0

TEA

2

3

4

0

0

0

TE-A

TEB

TE-B

5

6

TECOM

TECOM

Function

I –-

TE motor phase A

TE motor phase /A

TE motor phase B

TE motor phase /B

TE motor common

TE motor common

Table A-7. CN7 (C076 M A I N )

No.

1/0 Signal Nama Function

1

2 -

I m

GND

Platen gap sensor

Signal ground

Table A-8. CN8 (C076 MAIN)

Function No.

I

1/0 Signal Name

I

1 i Ffi

2GND

Release sensor

Signal !wound

Table A-9. CN9 (C076 MAIN)

No.

1/0 Signal Nama Function

1

2 -

I PE

GND

Paper-end sensor (F)

Signal ground

No.

1

2

3

-

I

-

Table A-10. CN1O (C076 MAIN)

1/0 Signal Name Function

EDGE

GND

LED

Top edge sensor

Signal ground

+5 VDC

~

1

2

Table A-14. CN14 (C076 MAIN)

No. 1/0 T

1

2

3

4

0

0

0

0

5-

6-

Signal Name

PFA

PF-A

PFB

PF-B

Table A-15. CN15 (C076 MAIN)

PFCOM

PFCOM

Function

PF motor phase A

PF motor phase /A

PF motor phase B

PF motor phase /B

PF motor common

PF motor common

Function No. I 1/0 I Signal Name \

CR motor

CR motor

0 C M +

0 CM-

Table A-16. CN16 (C076 MAIN)

No.

1/0 Signal Name Function

2

1

I

GND

THER

GND

Dummy register

I

@ s- c. . ..>>,

.$ -

*

43.-.

A-4

No.

2

1

32

33

34

35

36

28

29

30

31

24

25

26

27

18

19

20

21

22

23

14

15

16

17

8

9

10

11

12

13

5

6

7

3

4

Table A-17. CN17 (C076 M A I N )

1/0 Signal Name

0

HD2

0 HD4

0 HD6

0 HD8

0 HD 10

0 HD 12

0 HD 14

0 HD 16

0 HD 18

0 HD20

0 HD22

0 HD24

0 HD26

0 HD28

0 HD30

0 HD32

0 HD34

0 HD36

-

I

-

-

-

I

-

-

-

-

I

-

0 HD38

0 HD40

0 HD42

0 HD44

0 HD46

0 HD48

COM

COM

GND/T

THER

SHLD

ENB

SHLD

+ 5

SHLD

ENA

SHLD

GND

Function

Head data 2

Head data 4

Head data 6

Head data 8

Head data 10

Head data 12

Head data 14

Head data 16

Head data 18

Head data 20

Head data 22

Head data 24

Head data 26

Head data 28

Head data 30

Head data 32

Head data 34

Head data 36

Head data 38

Head data 40

Head data 42

Head data 44

Head data 46

Head data 48

Common

Common

GND for thermistor

Thermistor

Shield

Encoder phase B

Shield

+5 VDC

Shield

Encoder A

Shield

GND

No.

18

19

20

21

22

14

15

16

17

23

24

25

26

8

9

10

11

12

13

5

6

7

3

4

2

1 COM

COM

0 HD 1

0 HD3

0 HD5

0

HD7

0 HD9

0

HD 11

0 HD 13

0 HD 15

0 HD 17

0

HD 19

0

HD21

0 HD23

0 HD25

0 HD27

0 HD29

0 HD31

0 HD33

0 HD35

0

HD37

0 HD39

0 HD41

0 HD43

0 HD45

0 HD47

Table A-18. CN18 (C076 M A I N )

1/0 Signal Name Function

Common

Common

Head data 1

Head data 3

Head data 5

Head data 7

Head data 9

Head data 11

Head data 13

Head data 15

Head data 17

Head data 19

Head data 21

Head data 23

Head data 25

Head data 27

Head data 29

Head data 31

Head data 33

Head data 35

Head data 37

Head data 39

Head data 41

Head data 43

Head data 45

Head data 47

REV.-A

\o.

Table A-1 9. CN19 (C076 MAIN)

1/0 Signal Name Function

-

-

-

-

I

-

-

-

-

12

13

14

15

16

8

9

10

11

3

4

1

2

5

6

7 -

I

I

I PAUSE

0 TXS

I LDLED

0 CKS

LDSW

RXS

+ 5

+ 5

GND

GND

FG

LOCKB

FG

FG

FG

LOCKA

PAUSE switch

Transmit data

LED condition load

Serial clock

Switch condition load

Relived data

+ 5 VDC

+ 5 VDC

GND

GND

Frame GND

Case open sensor

Frame GND

Frame GND

Frame GND

+35 VDC

No.

2

1

-

-

Table A-20. CN20 (C076 M A I N )

1/0 Signal Name

RA

RB

Not used

Not used

Function

A-5

53 co

Re~tifier

Figure A-4. C076 PSB Board Circuit

A-9

-—

4 4 .4

+

1

IJ

4

I b b

+

+

.

4

4 v

5

(s

w

-

0 v

*

!s”

——

:

Figure A-5. C076 PSB Board Circuit

A-10

1

L 1

I I I

=r-J’

1

7

.1

z

>

44

—-

F i l t e r u u

~!

R e c t i f i e r I

L

Ill,

Figure A-6. C076 PSE Board Circuit D i a g r a m

A-1 1 u

1 1

,

1

1.

*

N a r,

I I

L k.

+

Figure A-7. C076 PSE Boerd Circuit Diagram

A-1 2

(-’J

.

—-----+11 I

1

1

I L I

— \

Figure A-8. Control Panel Board Circuit Diagram

A-1 3

REV.-A

A.3 CIRCUIT BOARD COMPONENT LAYOUT la -— ., . .

.-J ‘ – —...

.,”,

, m u s

—J u

:.

Kx

.

Ei

1 la

Figure A-9. C076 MAIN Board Component Layout (Surface)

A-1 4 c’

. .~

C301-J

Rl d“

C7 am

.

u

E

R70 n a

.

CIW n c1 clo3

REV.-A

Figure A-10. C076 MAIN Board Component Layout (Back Side)

A-1 5

REV.-A

II II +- – - L-J

CM +,

I ‘1 .s2. Nil w

(n

L2 ii

A c

1==-r’:=’os’

II

l’%

*:

“ ‘ lu~

*

10 I I m.P5ZI /

*n

I

*–

Lu

I

8“;

. m. .“. .?.. * -

A.’iu bmn-wa I

.,. , , , , ● , , , , ,

1

Figure A-1 1. C076 PSB Board Component Layout

A-1 6

II I

L

CN I

R16 w

I

- -

I

I

I

++ I

E

k-’&-,,E ich

,S.

I

CN3

21 r!

I I

Figure A-1 2. C076 PSE Board Component Layout

A-1 7

REV.-A

REV.-A

400

401

402

403

410

411

412

450

Ref. No.

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

100

101

102

103

104

105

106

107

108

200

300

330

331

350

500

501

502

503

504

505

506

HOUSING ASSY., LOWER

SHIELD PLATE

HOUSING, UPPER

HOUSING, FRONT

COVER, FRONT

COVER ASSY., PRINTER

SHEET GUIDE ASSY., REAR

SHEET GUIDE, FRONT

EDGE GUIDE, FRONT

KNOB

HOLDER, POWER SWITCH

COVER, MAIN BOARD

COVER, INTER LOCK

COVER, GEAR

COVER, CONNECTOR, UPPER

SHIELD PLATE, l/F

GROUNDING PLATE, l/F

GUIDE, l/F BOARD

GROUNDING PLATE, LEFT

GROUNDING PLATE, CENTER

GROUNDING PLATE, RIGHT

LOGO PLATE

C.P.S. SCREW (M3X8)

C.B.B. SCREW (M3XI 2)

P. MECHANISM MOUNTING SCREW

C.C.U. SCREW (M3X8)

C. B. S-TITE SCREW (M3XI 2)

C.B. SCREW (M4X16)

FOOT

C. P. S.(P.S.) SCREW (M3X8)

MINI CLAMP

FRAME, FRONT

Table A-21. Part No. Reference Table

Description Ref. No.

BOARD ASSY., MAIN

B. ASSY., POWER SUPPLY (120V)

HARNESS

HARNESS

B. ASSY., POWER SUPPLY (220/240V)

POWER CABLE VD3 1303SA-1 OA

POWER CABLE (BSO030303SA-SR-1 OA)

POWER CABLE VDO0303SA-IOA

POWER CABLE (AS3 1303S1)

POWER CABLE ASSY.

POWER CABLE ASSY.

HARNESS

CONTROL PANEL

PRINTER MECHANISM M-47 10/4760

PULLEY, DRIVEN

FRAME, SUB, RIGHT

FRAME, STRENGTHEN, RIGHT

FRAME, STRENGTHEN, LEFT

FRAME ASSY., LEFT

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

524

525

526

527

528

529

530

531

532

533

534

535

536

538

539

540

541

542

543

545

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

Description

FRAME ASSY., RIGHT

MOUNTING PLATE, MOTOR, CR

DC MOTOR, CR

RESISTOR

HARNESS, TOP EDGE DETECT

CARRIAGE ASSY.

TIMING BELT

CABLE ASSY., HEAD

HOLDER, CABLE, PRINT HEAD

PRINT HEAD

PLATEN ASSY.

TOP EDGE HOLDER ASSY.

S., TRANSMISSION, T.

E. HOLDING

ROLLER ASSY., PF

HARNESS, PE, FRONT

HARNESS, PE, REAR

CONNECTOR SWITCH

HARNESS, PF

DETECTOR ASSY., REAR

ROLLER, PF, DRIVEN, LOWER

COMPRESSION SPRING, 1000

EXTENSION SPRING, 70

DETECTOR, PE, FRONT

SHAFT, RELEASE

PAPER HOLDING, ASSY.

PUMP ASSY.

MOTOR ASSY., PUMP

C.B. SCREW (M2.6X5)

PLAIN WASHER (8X0.5X1 5)

CLEANER ASSY.

CAP ASSY.

PAPER GUIDE

POROUS PAD, CR, OIL TANK

SHEET, HOLDER, PLATEN

GROUND SPRING

CRAMP CORE

TUBE, SUPPLY, INK

COVER, TUBE

HOLDER ASSY., INK CARTRIDGE

HOLDER ASSY., NEEDLE

DETECTOR ASSY., INK CARTRIDGE

DETECTOR ASSY., INK

TUBE SET SCREW

O RING

FRAME, HOLDER, INK CARTRIDGE

HOLDING PLATE, HOLDER, INK CAR.

SENSOR SUB ASSY., PW

COVER, TOP EDGE DETECT

PWS COVER

T. E. HOLDING TRANSMISSION GEAR

TOP EDGE HOLDER GEAR

HOLDER, TOP EDGE HOLDER, LEFT

COVER, TOP EDGE DETECT, REAR

TANK, INK EJECT

PAPER GUIDE ASSY., SUPPORT

A-24

Ref. No.

625

626

627

628

629

630

631

632

617

618

619

620

621

622

623

624

610

611

612

613

614

615

616

600

601

602

603

604

605

606

607

608

609

594

595

596

597

599

586

587

588

589

590

591

592

593

572

573

574

575

576

577

581

582

585

Description

HOLDER, P. GUIDE, SUPPORT, LEFT

HOLDER, P. GUIDE, SUPPORT, RIGHT

ROLLER ASSY., DRIVE

M. PLATE ASSY., PULLEY, DRIVEN

PLAIN WASHER (3.2X0.5X7)

BALL BEARING

STEPPING MOTOR, PF

S. MOTOR, TOP EDGE HOLDER

SHEET, CABLE, HEAD, PROTECTION

SHEET, INK, STOPPER

CARRIAGE MOTOR DAMPER

TUBE SET SCREW

O RING

SHEET, ADJUST, CAP

CAP, LEVER ADJUST

LEVER, PARALLEL, ADJUST

SHEET, ADJUST, CAP

LEVER, GAP, ADJUST

LEVER, RELEASE, MAIN

LEVER, RELEASE, SUB

LEVER, RELEASE, TRANSMISSION

HOLDER, PLATEN, LEFT

FRAME, REAR

SHAFT, CR, GUIDE, SUB

SHAFT, CR, GUIDE, MAIN

POROUS PAD, CR, OIL

PRESSING PLATE, COVER SPRING,V

COVER, HOLDER, INK CAR.

POROUS PAD, INK HOLDER

PIN, ADJUST

GUIDE, PAPER EJECT

;ROUNDING PLATE, MOTOR, CR

‘R ESSING PLATE, COVER SPRING, L.

;OVER, PLATEN

5UIDE, PAPER LOAD

)ETECTION, PLATE, PTS

;TOPPER, CR, LEFT

STOPPER, CR, RIGHT

;PACER, CR, GUIDE, SUB

NTERMITTENT GEAR

COMBINATION GEAR 8,30

;PUR GEAR, 27

SPUR GEAR, 34.5

;PUR, GEAR 34

;PUR GEAR, 34.5

‘APER FEEDING REDUCTION GEAR

IASE RUBBER

‘ORSION SPRING, 3490

COMPRESSION SPRING, 200

EXTENSION SPRING, 328

‘ORSION SPRING, 6750

‘ORSION SPRING, 6750

‘ORSION SPRING, 700

COMPRESSION SPRING

.OCKING WIRE SADDLE

Ref. No.

658

659

660

661

662

663

664

665

666

700

650

651

652

653

654

655

656

657

701

702

703

704

705

706

707

708

709

710

711

641

642

643

644

645

646

648

649

633

634

635

636

637

638

639

640

Table A-21. Part No. Reference Table (Cent)

Description

EDGE SADDLE

CLAMP

PLASTIC RIVET

U-TYPE SPRING WASHER

C.B. SCREW (M2.5X3)

CUP SCREW (M2X4)

CUP SCREW (M3X5)

CUP SCREW (M3X8)

C.C. SCREW (M3X12)

FLANGE NUT (M4)

PLAIN WASHER (6 X0.7X I 2)

PLAIN WASHER ( 10.3X0.5X 18.7)

PLAIN WASHER (8. 1 XO.5X22.2

PLAIN WASHER (3. 1 XO.5X6. 1 )

LEAF SPRING

LEAF SPRING

RETAINING RING (3)

RETAINING RING (4)

C.B.S. SCREW (M3X8)

C.B.B. SCREW (M3X6)

C.B. B. SCREW (M3X8)

C.B.B: SCREW (M3XI 2)

C.B.S. SCREW (M2.5X8)

C.B.S. SCREW (M2.5X8)

C. T2.P. SCREW

RETAINING RING (2.3)

C.P.B. SCREW (M2X1 O)

S. C. P.(P4) SCREW (M3X8)

C. P.S.(P) SCREW (M3X8)

C. B. S-TITE SCREW (M2.5X6)

C. B. S-TITE SCREW (3X12)

MIRE BAND

;HEET, NOTICE

‘RACTOR ASSY.

‘RACTOR, LEFT

‘RACTOR, RIGHT

;HAFT, TR, DRIVE

;HAFT, TR, GUIDE

‘RAME, TR, LEFT

‘RAME, TR, RIGHT

.EVER, TR, LEFT

.EVER, TR, RIGHT

‘APER SUPPORT

‘RACTOR GEAR

IETAINING RING (6)

REV.-A

A-25

REV.-A

A.5 CASE OUTLINE DRAWING

—

II r

I

H

I

I w

!

h

,

I 1

J

— r-=

T

, $?3. .

325 mm I

Figure A-19. SQ-870 Case Outline Drawing

A-26

1(

1,

I

1

&

1“ I -----1

I

I

I

1----1

I

(

! ,

(yK$

“.

1

,-

1 1

1

. .

/ ’

J

325 mm

Figure A-20. SQ-1 170 Case Outline Drawing

A-27

REV.-A

EPSON

SEIKO EPSON CORPORATION

PRINTER DIVISION

EPSON OVERSEAS MARKETING LOCATIONS

EPSON AMERICA, INC.

20770 Madrona Avenue

Torrance CA 90503, U . S . A .

Phone: (2 13) 782-0770

Fax: (21 3) 782-5248

EPSON UK LTD.

Campus 100, Maylands Ave,

Hemel Hempstead, Hertfordshire,

HP2 7EZ, U.K.

P h o n e : 0 4 2 2 - 6 1 1 4 4

F a x : 0 4 2 2 - 2 2 7 2 2 7

EPSON AUSTRALIA PTY. LTD.

17 Rodborough Road,

Frenchs Forest, NSW 2086, Australia

Phone: (02) 452-0666

Fax: (02) 975-1409

EPSON HONG KONG LTD.

25/F, Harbour Centre,

25 Harbour Road, Wanchai,

Hong Kong

P h o n e : 5 - 8 3 1 4 6 0 0

F a x : 5 - 7 2 5 7 9 2

EPSON ITALIA S.p.A.

V. Ie F. Ili Casiraghi, 427

20099 SESTO S. GIOVANNI Ml, ITALY

Phone: 2-26233.1

F a x : 2 - 2 4 4 0 7 5 0

EPSON DEUTSCHLAND GmbH

Zulpicher Stra13e 6, 4000 Dusseldorf 11

F.R. Germany

Phone: (02 1 1) 56030

Fax: (21 1) 504-7787

EPSON FRANCE S. A.

68 bis, rue Marjolin 92300,

Levallois-Perret, France

Phone: (1) 47-373333

Fax: (1) 47-371510

EPSON SINGAPORE PTE. LTD.

No. 1 Raffles Place #26-00

Oub Centre, Singapore 0104

Phone: 5330477

Fax: 5338119

EPSON ELECTRONICS TRADING LTD.

(TAIWAN BRANCH)

10F, No. 287 Nanking E. Road Sec. 3,

Taipei, Taiwan, R.O.C.

Phone: (02) 717-7360

F a x : 0 2 - 7 1 2 9 1 6 4

EPSON IBERICA S.A.

Avda. De Roma, 18-26

08290 -Cerdanyola del Vanes

Barcelona, Spain

Phone: (3) 582.15.00

Fax: (3) 582.15.55

SEIKO EPSON CORPORATION

(Hirooka Office)

80 Harashinden, Hirooka

Shiojiri-shi, Nagano-ken

399-07 Japan

Phone: (0263) 52-2552

Telex: 3342-214 (SEPSON J)

1991 Sept.

EPSON

Printed in Japan

92.02 -.7-G