Epson FX-850, FX-1050 Service Manual

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Page 1

FX-85t3/I05D

TECHNICAL MANUAL

EPSON

Page 2

~...,,

(-’

NOTICE

whatsoever without “ 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,

being informed of them. “ The above notwithstanding

errors in this manual or the consequences thereof.

SEIKO EPSON’S express written permission is forbidden.

SEIKO EPSON would greatly appreciate

SEIKO EPSON can assume no responsibility for any

Na,ga

no, Japan

-i-

(,.

. . . .

”

Page 3

PREFACE

This manual describes functions, theory of electrical and mechanical

FX-

operations, maintenance, and repair of the FX-850 and 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:

1050.

REV.-A

Chapter 1 -

Chapter 2 -

Chapter 3 -

Chapter 4 -

Chapter 5 -

Chapter 6 -

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

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

Describes the theory of printer operation.

Discusses the options

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

Provides Epson-approved techniques for troubleshooting.

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

– iv

–

Page 4

REV.-A

REVISION

REVISION TABLE

DATE ISSUED

CHANGE DOCUMENT

g,},

. .. .

February 15, 1988

1st issue

-v-

f--;

Page 5

REV.-A

PRECAUTIONS

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

to equipment:

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

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

WARNING Signals a precaution which, if ignored, 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 HOST COMPUTER BEFORE PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.

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

THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

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 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 DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

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

NUMBERIRATING PLATE. IF THE EPSON PROD-

jLP

CHIPS AND CIRCUITRY, USE STATIC

- ii -

Page 6

CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES

REV.-A

CHAPTER 3.

CHAPTER 4.

CHAPTER 5. CHAPTER 6. APPENDIX

OPTIONAL EQUIPMENTS (Intentionally omitted at this time)

DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT TROUBLESHOOTING MAINTENANCE

–

vi –

Page 7

CHAPTER 1

GENERAL DESCRIPTION

REV.-A

FEATURES

1.1

SPECIFICATIONS

1.2

1.2.1 Hardware Specifications

1.2.1 Firmware Specifications INTERFACE OVERVIEW

1.3

1.3.1 8-bit Parallel Interface Specifications DIP SWITCHES AND JUMPER SETTING

1.4

1.4.1 DIP Switch Settings

1.4.2 Jumper Settings SELF TEST OPERATION

1.5 HEXADECIMAL DUMP FUNCTION

1.6

PRINTER INITIALIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7

1.7.1 Hardware Initialization

1.7.2 Software Initialization

BUZZER OPERATION AND ERROR CONDITIONS ................. 1-22

1.8

1.8.1 Buzzer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.8.2 Error Conditions

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

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

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

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

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

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

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

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

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

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

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

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

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

1-1 1-3 1-3

1-1o

1-12 1-12 1-17 1-17 1-18 1-19 1-20

1-21

. 1-22

1-22

PAPER HANDLING FUNCTIONS

1.9

1.9.1 Autoloading and

1.9.2 Short Tear-Off Function

1.9.3 Micro-Adjustment Top-of-Form

1.10 PAPER END DETECTION

1.11 MAIN COMPONENTS

1.11.1

1.11.2

1.11.3

1.11.4

1.11.5

Printer Mechanism PEGX Board (Main Board)

PEBFIL-11

Power Transformer

PGPNL Board (Control Panel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

Housing

Board (Filter Board) and

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

Backout Function

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

LIST OF FIGURES

Figure 1-1.

Exterior Views of the FX-850/1050

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

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

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

(TOF) Set Function . . 1-23

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

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

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

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

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

1-23

1-23 1-23

1-24 1-25 1-26 1-27

1-28

1-31

1-1

Figure 1-2.

Printhead Pin Configuration

l-i

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

1-3

Page 8

REV.-A

Figure 1-3.

Cut Sheet Paper Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6

“’”

Figure 1-4. Figure 1-5. Figure 1-6.

Figure 1-7. Figure 1-8. Figure 1-9.

Figure 1-10. Paper End Detection Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Figure 1-11. Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-12. Figure 1-13.

Figure 1-14. PEGX Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-15.

Figure 1-16. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 1-17. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fanfold Paper Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Head Adjustment Lever Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Data Transmission Timing of 8-bit Parallel Interface

36-pin 57-30360 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Self-Test Printing

Hexadecimal Dump Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Model-3B10

Model-3B60

PEBFIL-11

(FX-850) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(FX-105O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Board and Power Transformer . . . . . . . . . . . . . . . . . . . . . 1-28

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

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

1-7

1-12

1-19

1-25

1-26

1-27

1-29

1-31

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

Table 1-9. Table 1-10. Table 1-11. Table 1-12.

Table 1-13.

Table 1-14.

Table 1-15.

LIST FO TABLES

Optional Units Optional Interface Boards Line Feed Speeds

Cut Sheet Paper Specified Conditions . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Fanfold Paper Specified Conditions

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

Envelope Specifications

Label Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lever Adjustment

Ribbon Cartridge Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Specifications Environmental Conditions

Print Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Print Columns

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

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

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

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

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

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

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

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

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

1-2 1-2 1-4

1-5

1-6

1-8

1-9 1-9 1-9

1-10

1-11

~-:-,

. . .

Table 1-16. Table 1-17.

Table 1-18.

Character Size and Pitch Connector Pin Assignments and Signal Functions Printer Select/Deselect Control

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

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

1-11

1-14

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

1-16

Page 9

REV.-A

Table 1.19. DIP Switch Table

1-20. International Character Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Table 1-21. Table 1-22. Table 1-23. Self Test Operation

1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DIP Switch 2 Settings

Setting

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

...................................................:...

.......................................S.......SS........."..

. 1-17

1-18

1-19

Table 1-24. Hexadecimal Dump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

1-iii

Page 10

1.1 FEATURES

REV.-A

The FX-850 and

CPS.

Either model FX-850 with 80 columns or

to your requirements. The main features are as follows:

Max. printing speed:

●

Advanced paper handling functions: Auto tear-off

●

SelecType function (Any print mode can be selected directly from the front panel). Once a mode is selected, it is stored in the non-volatile memory, and is selected when the printer power is turned on. Two

●

NLQ

Printer driver EPSON

such as

Double-height function Pitch control is possible in the Since the IBM emulation mode is standard, these printers are IBM-compatible. The IBM characters are also standard.

8K-byte

Push tractor unit Printing is possible on envelopes and labels in addition to fan-fold paper, cut sheets, and roll paper. User-defined characters are supported in both the Draft and is registered, it is stored in the non-volatile memory and need not be re-registered. The user-defined character set can only be selected (as a default character set) using the DIP switches. Compatible with EPSON optional interface board series #81 XX.

input data buffer (Buffering can be disabled.)

FX-1

050 are serial dot matrix 9-pin terminal

FX-1

050 with

264

CPS

(Draft and Elite)

CPS

220

fonts (Roman and Saris-serif) are standard.

ESC/P-83 is standard. (This driver is compatible with the high class models

FX-800, -1000, -86e, and -286e.)

(Draft and Pica)

Auto loading Auto back-out

Micro adjustment

NLQ

mode. (Pica, elite, proportional modes)

printers that print at a maximum of 264

136 columns can be selected according

NLQ

(Saris-serif) modes. Once a character

FX-850

Figure 1-1. Exterior Views of the FX-850/1050

1-1

Page 11

REV.-A

No.

Table 1-1. Optional Units

Name

FX-850

FX-1

050

#83 10 #731 1 #731 2 #7339 #7340 #8750 #8755 (M) #8758 #81 XX Optional Interface Board

Roll Paper Holder

Pull Tractor Unit Pull Tractor Unit Cut Sheet Feeder (single-bin) Cut Sheet Feeder (single-bin) Ribbon Cartridge Ribbon Cartridge Ribbon Pack

Table 1-2. Optional Interface Boards

No.

#8 143 New serial interface

o o o

Name

#8145

I I I

#8172 I 32 K-byte buffer parallel interface

IRS-232C

#8 148 #8 149 Intelligent serial interface type II #8 149M Intelligent serial interface type III #816 1 IEEE-488 interface #8 165 Intelligent IEEE-488 interface

#81 72M

current loopinterface type II

Intelligent serial interface

128K-byte buffer parallel interface

-., .

t “’

1-2

Page 12

1.2 SPECIFICATIONS

REV.-A

The

FX-850/l

specifications for the printer.

1.2.1 Hardware Specifications Printing Method

Pin Configuration

050 communicates

Serial, impact dot matrix See Figure 1-2 (diameter: 0.29 mm).

with a wide variety of host computers. This section describes the

Wires

# 1’

51 ‘

T 4

--— --

––-

———

0.35mm ( 1/72” )

---

0.29mm

---

Figure 1-2. Printhead Pin Configuration

Feeding Method

NOTES: 1. When using friction feed:

● Use the paper tension unit.

● Do not use fanfold paper.

● Do not perform reverse feed beyond than 1/6 inches after the paper end has been

detected.

● Do not use multi-part, single-sheet forms.

2. When using tractor feed:

●

Release the friction feed mechanism.

●

Multiple copies for printing must be finished by pasting them together at the line or dots.

●

Copy paper must be a carbonless multi-part paper. a) When using push tractor feed: Use the paper tension unit.

●

Friction feed

Tractor feed (push: standard, pull: optional)

1-3

Page 13

REV.-A

● Do not perform reverse feeding for more than 1/6 inches.

● Because accuracy of paper feed cannot be assured, do not perform reverse feeding ‘

after the paper end has been detected.

b) When using pull tractor feed:

● Remove the paper tension unit and mount the pull tractor unit.

● Use the paper path when a single sheet is inserted.

c) When using push-pull tractor feed:

● Remove the paper tension unit and mount the pull tractor unit.

● Do not loosen the paper between the platen and the pull sprocket.

● -Precisely the horizontal position of the pull sprocket and push tractor.

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

Paper Loading Directions

Fanfold paper

Cut sheet paper Line Spacing Line Feed Speed See Table 1-3.

Inserted from the rear side Inserted from the up side

1/6” or programmable (min.

Table 1-3. Line Feed Speeds

f’”

1/2 16“)

Type of Paper Continuous Feed Intermittent Feed Feed Speed

Cut Sheet Fanfold

Paper Specifications

Cut sheet paper Refer to Table 1-4.

Table 1-4. Cut Sheet Paper Specified Conditions

Width [mm] 182-257 (7.2 - 10.1”) 182-366 (7.2 - 14.4”) Length Thickness [mm] Weight [Kg]

Quality Plain paper

[mm] 182 -

48 ins/line 71 ins/line 3.5 “/see 53 ins/line 76 ins/line

I I

3.1 “/see

FX-850 FX-1 050

364 (7.2 - 14.3”)

0.065 -

0.10 (0.0025 - 0.004”)

45 - 70 (14 - 22 lb)

Copies

NOTE: The form overriding mechanism enables printing as close as 13.5 mm from the bottom edge

of the paper. However, paper feed accuracy is not guaranteed within about 22 mm from the bottom.

Not available

1-4

Page 14

Fanfold

Refer to Table 1-5.

Table 1-5. Fanfold Paper Specified Conditions

Width

Copies

Quality Total Thickness

Weight

paper

Width

[mm]

[sheet]

[mm]

[Kg]

[mm]

FX-850

- 254 (4.0 - 10.0”) 101 - 406 (4.0 - 16.0”) ~

101

4 (1 original + 3 ) at normal temperature 3 (1 original + 2 ) at all temperature range

Plain paper

0.065 -

Fanfold 45-70 (14 -22 lb) Multi-part forms 34 - 50 X N (N

Refer to Table 1-6.

Table 1-6. Roll Paper Specifications

0.32 (0.0025 -0.01 2“)

FX-850

only

FX-1 050

Length

Thickness [mm]

Weight [Kg] Quality

Copies

Envelope

Size Weight Quality

[mm]

I I

Refer to Table 1-7.

Table 1-7. Envelope Specifications

[mm]

[Kg]

Roll diameter not more than 127 mm (5”)

-0.09 (0.0028 - 0.0035”)

0.07

45 - 55

Plain paper

Not available

FX-850/l

166 X 92, 240 X 104

39-

78 (12

Plain, Bond, Air mail

050

-24 lb)

Operating conditions: Printing must be executed at normal room temperature.

Envelopes must be oriented with the long direction parallel to the carriage.

1-5

Page 15

REV.-A

Label

Refer to Table 1-8.

Table 1-8. Label Specifications

f:,,,

Size

Thickness [mm]

Printable Area

Cut sheet paper

[mm] 63.5 X 2.38 (2.5 X 15/16”),

0.12”, 3rnm

or more

0.33”, or more

MOX.14.3”

364mm

101.6 X 2.38 (4 X 15/1 6“)

101.6 X 36.5 (4 X 1 7/1 6“)

less than 0.19 (0.0075”)

See Figure 1-3.

10.1*’

(14.4)”.

Printable area

i n t a

8.5mm

72 -

8m(13.6’’),203.6mm

Aec

FX-850/l

182 - 257(366)mm

(354.4 mm)

050

XYZ

-1

0.12”, 3mm

or more

r e a

0.87”, 22mm or more

NOTES: 1. Values in the parentheses apply to the FX-105O.

2. Printing is possible for approximately 42 mm after the bottom edge of a page has detected. Thus, the value 13.5 mm (lowest print position) is given for reference only. Paper

feed accuracy cannot be assured in the area approximately 22 mm (0.87”) from the bottom edge of the page.

Figure 1-3. Cut Sheet Paper Printable Area

A8C

1-6

XYZ

-1

be~n

Page 16

REV.-A

Fanfold paper

Printable

area

0.36”, or

more!

0.35”, or more

Printabh

area

See Figure 1-4.

9mm

o 0 0 0 0 0 0

o ABC

o 0 0

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

o 0 0

o ABC

o“

0 0 0 0 0

10*~(16)”, 101

Printable area

Max. 203.3(

350)mm

254(406)mm

,8”(13.8”)

XYZ :

X’iz :

0 0 0 0 0 0

0 0

0 o 0 0 0 0 0

NOTE: 1. Values in the parentheses apply to FX-105O.

2. 0.47”, 12 mm or more when the 101 to 242 mm (4 to 9.5”) width paper is used.

0.98”, 25 mm or more when the 254 mm (10”) width paper is used.

Figure 1-4. Fanfold Paper Printable Area

Envelopes

Size Quality Thickness

No. 6 (166 X 92 mm), No. 10 (240 X 104 mm) Bond paper, xerographic copier paper, airmail paper

0.16-

0.52 mm (0.0063 -0.01 97”)

NOTE: Differences in thickness within printing area must be less than 0.25 mm (0.0098”).

121

Weight

-241 lb (45 -91

NOTES: 1. Envelope printing is only available at normal temperature.

2. Keep the longer side of the envelope horizontally at setting.

3. Set the left of No. 6 envelope at the setting mark of the sheet guide.

Label

Size

Thickness

2 1/2 X 15/16”, 4 X 15/16”, 4 X 1 7/16”

O.19 mm (0.0075) max.

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

g\m2)

1-7

Page 17

REV.-A

NOTES: 1.

Printing of labels is only available at Labels must be fanfold.

2. Labels with pressure-sensitive paper

and the total thickness must be less

normal temperature.

must be jointed by pasting along the dots or lines,

than or equal to 0.3 mm (O.

under conditions that must be between 5 to 35 “C and 20 to Examples of labels: AVERY CONTINUOUS FORM LABELS

AVERY MINI-LINE LABELS

8“) to be printed out

80Y0

RH.

:!,,

Lever Adjustment

See Figure 1-5 and Table 1-9.

Table 1-9. Lever Adjustment

Lever Position

2nd

3rd 4th

5th

Paper Thickness [mm]

0.06 -0.12

-0.17

o.13

0.18

0.26 .

:::

Head adjustment Lever

‘“’ward-

.fl

(*’

q“’’”’”

Figure 1-5.

Head Adjustment Lever Positioning

NOTES: 1. When printing density becomes lighter, set the head adjustment lever one position lower.

2. When using thicker paper than shown in the above table, set the head adjustment lever to the 6th or higher appropriate position by performing the self-test operation.

<=,”

Ribbon Cartridge

Printer

Color

Life Dimension

(W) X (h) X (d)

See Table 1-10.

Table 1-10. Ribbon

Ribbon Model No.

[characters]

[mm]

Cartridge Specification

#8750

FX-850

3 million (14 dots/character)

293 X 34 X 72

1-8

#8755 (M)

FX-1 050

Black

468 X 34 X 78

Page 18

Dimensions

Weight

See Table 1-11 (Details are shown in Figures A-45 and 46.). See Table 1-11.

Table 1-11. Dimensions and Weight

Width [mm] Height [mm]

FX-850

FX-I 050 605 150

NOTE: Excluding platen knob and paper guide.

Electrical Specifications See Table 1-12.

—

Voltage [V AC]

Frequency range [Hz] 49.5 - 60.5 Rating current [A]

Insulation resistance [M ohm] min. (between AC line and chassis)

430 150

Table 1-12. Electrical Specifications

Depth [mm]

120 V Version

120V

10YO

360

Weight [Kg]

9.5

12.5

220/240 V Version

220/240V

& 10%

Dielectric strength [V AC, rms] (1 minute, between AC line and chassis)

Environmental Conditions

Temperature [“C]

Humidity [% RH] Resistance to shock [G] (within 1 ms) Resistance to vibration [G] (55 Hz, max.)

Reliability

MCBF

MTBF

Printhead

life

1250

Refer to Table 1-13.

Table 1-13. Environmental Conditions

Storage

- 60

–30

- 85

0.50

5 million lines (excluding

(MCBF

. . .

Mean Cycles Between Failure)

FX-850: 4000

FX-105O: 6000

100 million characters (14 dots/character)

POH

(duty 25%)

POH

printhead)

(duty 25%)

1250

Operating

5 -35

10 - 80

0.25 I

1-9

Page 19

REV.-A

Safety Approvals

Safety standards

Radio Frequency Interference

1.2.2

Firmware Specifications

UL4785th (U.S.A. version) CSA22.2#220 VDE0806

(RFI)

FCC class B (U.S.A. version)

VDE871 (European version)

(TUV)

(European version)

Control Code

Printing Direction

Text

Bit-image Character Code Character Set

Font

Printing Mode

NOTE: A condensed mode for 15

ESC/P-83

Bidirectional printing with logic seeking Unidirectional printing 8 bits 96 ASCII and 13 international character sets Graphics

NLQ NLQ

Draft:

Printing quality

Character pitch (10, 12, 15

Roman: Saris-serif: 10, 12, 15, Proportional

Condensed Double-width Double-height Emphasized

Double-strike Italic Underlined

CPI

characters is not available.

10, 12, 15, Proportional

(Draft/NLQ)

CPI

or Proportional)

Print Speed

Draft pica

Draft elite

ICondensed draft pica IEmphasized draft pica

NLQ

NOTE: When any italic character is in the same line, the print speed

the parentheses.

Refer to Table 1-14.

Table 1-14. Print Speed

Type of Letters

normal pica

I I

1-10

Print Speed

220 (107)

264 (1 28)

183 (91) 107

[CPS]

will be reduced to the value in

Page 20

Print Columns

Refer to Table 1-15.

Table 1-15. Print Columns

Printable Columns

Type of Letters

FX-850

Normal

Condensed

Elite

Condensed elite 160

NOTE: In Condensed mode, printable column is always 137.

(Previous FX series is 132.)

Character Size, Pitch Refer to Table 1-16.

Table 1-16. Character Size and Pitch

Type of Letters

Width

137

[mm] [mm]

Height

IcPI]

FX-1 050

136

Character Pitch

233

163

272

[mm]

Normal

Emphasized Condensed Elite 1.7

Condensed elite 0.85

NOTE: Width of Elite character is changed to 1.7 mm from 2.1

mm (not same as normal mode).

2.1

1.05

3.1

2.54 (1 O

1.48 (17

2.11 (12

1.27 (20

cpi)

cpi) cpi) cpi) cpi)

1-11

Page 21

REV.-A

1.3 INTERFACE OVERVIEW

The

FX-850/l

1.3.1 8-bit Parallel Interface Specifications

Data Transmission Mode Synchronization Handshaking Logic Level

Data Transmission Timing

Connector

050 has 8-bit parallel interface as standard.

pallarel

8-bit

By STROBE pulse By BUSY and ACKNLG (either or both)

TTL compatible

See Figure 1-6. 57-30360 (AMPHENOL) or equivalent

(See Figure 1-7.)

‘“s’

—--J---’

2!-,

NOTE: Transmission time (rising and falling time) of every input signal must be less than 0.2

—r—Lrl———ttt—

Figure 1-6. Data Transmission Timing of 8-bit Parallel Interface

ps.

.:.

t,, .

1-12

Page 22

-. s

;

Page 23

REV.-A Table 1-17 shows the connector pin assignments and signal functions of the 8-bit parallel interface.

Table 1-17. Connector Pin Assignments and Signal Function

~,.

.., ’

Pin No.

2 3 4 5 6 7 8 9

Signal Name

STRORE

DATA 1 DATA 2 DATA 3 DATA 4 DATA 5 DATA 6 DATA 7 DATA 8

ACKNLG

BUSY

Return Pin No.

21 22 23 24 25 26 27

DIR

Strobe pulse to read the input data.

be more than 0.5#s. Input data is latched after falling edge of this signal.

These signals represent information of the 1st to 8th

bits of parallel data, respectively. Each signal is at “HIGH” level when data is logical “1“ and “LOW” when

logical “O”.

In In In In In

out

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

out

A “HIGH” signal indicates that the printer cannot receive data.

ing cases:

1. During data entry

2. During printing operation

3. In off-line status

4. During printer error status

Functional Description

Pulse width must

12#s.

The signal becomes “HIGH” in the follow-

12 13 14

15 16 17

- 30

AUTO FEED XT

CHASSIS

GND

INIT

ERROR

out

A “HIGH” signal indicates that the printer is out of paper. Pulled up to

With this signal at “LOW”’ level, the paper is automatically fed one line after printing. (The signal level can be fixed to “LOW”’ with DIP SW 2-4.)

Not used. Logic Printer chassis

In the printer, the chassis isolated from each other.

Not used.

TWISTED-PAIR RETURN signal

When the level of this signal become

GND

+5V

through 3.3 K ohms resistor.

level.

GND.

GND

and the logic

GND

level.

“LOW”, the printer controller is reset to its initial state and the print buffer is cleared. This signal is normally at “HIGH” level, and its pulse width must be more than 50 @ at the receiving terminal.

out

The level of this signal becomes “LOW” when the printer is in -

1. Paper-out status

2. Off-line status

3. Error status

GND

are

1-14

Page 24

Table 1-17. Connector Pin Assignments and Signal Function (cent’d)

REV.-A

Pin No. Signal Name

NOTES: 1.

GND

SLCT-IN

“DIR” refers to the direction of signal flow as viewed from the printer. “Return” denotes “TWISTED-PAIR RETURN” and is to be connected at signal ground level. As to the wiring for the interface, be sure to use a twisted-pair cable for each signal and never fail to complete connection on the Return side. To prevent noise effectively, these cables should be shielded an connected to the chassis of the host computer and the printer, respectively.

All interface conditions are based on TTL level. Both the rise and fall times of each signal must be less than

Data transfer must not be carried out by ignoring the (Data transfer to this printer can be carried out only after confirming the

or when the level of the BUSY signal is “LOW”.)

Return Pin No.

0.2Ks.

DIR

Functional Description

Same as with Pin No. 19 to 30.

Not used. Pulled up to The DC

“HIGH” level. (Internal fixing can be carried out with Jumper- l.)

+5V

through 3.3 K ohms resistor.

l/DC3

code is only valid when this signal is

ACKNLG

or BUSY signal.

ACKNLG

signal

1-15

Page 25

REV.-A

Table 1-18 shows the printer select/deselect (DC

SLCT-IN

input, DC 1

/DC3,

and interface signals.

Table 1-18. Printer Select/Deselect Control

l/DC3)

control, including relations among ON-LINE,

:):>

. .

ON-LINE SW

OFF-LINE

ON-LINE HIGH

HIGH/LOW

SLCT-IN

LOW

Dcl/Dc3

l/DC3

DC 1

DC3 HIGH

DC 1

DC3 HIGH

ERROR

LOW HIGH HIGH

HIGH

LOW\HIGH

(During data entry)

LOW\HIGH

(During data entry)

LOW/HIGH (During data after entry entry)

LOW/HIGH (During data entry)

BUSY

ACKNLG

No pulse Disable Pulse output

after entry

Pulse output after entry

Pulse output

Pulse output after entry

DATA ENTRY

Enable

mal

Enable (Waits DC1. See Note 2)

Enable (Nor-

mal

(Nor-

Process)

NOTES: 1. In the Table 1-18, it is assumed that no ERROR status exists other than that attributable

to OFF-LINE mode.

DC3

2. Once the printer is deselected by the

code, the printer will not revert the selected state

unless the DC 1 code is input again. (In the deselected state, the printer ignores input data

until the DC

3. The DC 1 and

code is received.)

DC3

codes are enabled only when the

SLCT-IN

signal (Input Connector No.36

for the parallel interface unit) is HIGH and printer power is initialized.

4. If the

SLCT-IN

signal is LOW when the printer is initialized, DC

l/DC3

printer select/deselect

control is invalidated, and these control codes are ignored.

5. If the

SLCT-IN

signal is HIGH and is not set to LOW by jumper 6 when printer initialized,

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

f-:

1-16

Page 26

1.4 DIP SWITCHES AND JUMPER SETTINGS

REV.-A

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

1.4.1 DIP Switch Settings

The DIP switches are located at the right side of the printer. When the printer hardware is initialized, the following functions are set to the default values shown in the table below.

Table 1-19. DIP Switch 1 Settings

1-1 1-2 1-3 1-4 1-5

1-6 1-7

Description Default character set

Shape of zero

Table select

Protocol mode

Short tear-off mode

International character set

User-defined Slashed Graphic IBM emulation

off

See Table 1-20.

FX-850/l

OFF ROM Not slashed Italic ES C/P

050 printer.

1-8

NOTE:

Default character set

Shape of zero

Protocol mode

When DIP

When DIP switch 1-1 is ON, the user-defined character set will be selected as default.

User-defined characters are maintained in printer memory even when the power is turned off, so the user-defined character set can be easily selected simply by turning off the power, setting this switch to ON, and then turning the power on again.

When DIP switch 1-2 is ON, prints for clearly distinguishing between

When DIP switch 1-4 is ON, printer operates in the IBM emulation mode; when off, printer operates in the Epson Functions of emulation mode.

SW1-4 is on (IBM mode), the function of DIP SW1-3 changes to auto CR ON/OFF.

a stashed zero (0); when OFF, prints open zeros (0).

uppercase O and zero when printing program lists,

ESC/P mode.

DIP

switches 1-6, 1-7, and 1-8 are different when using the printer in the IBM

Useful etc.

Short Tear-off

When print operation has finished, the short tear-off feature automatically feeds the perforation

of the continuous paper to the tear-off edge of the sheet guide cover so that the user can tear

off the last sheet. When the user resume printing, the paper is fed backward to the loading position.

1-17

Page 27

REV.-A

Country

Table 1-20. International Character Set

1-6

1-7

1-8

IBM

Table

,,# ,. .:

USA

France

Germany UK ON OFF Denmark Sweden Italy Spain

NOTE: When DIP SW1-4 is on (IBM mode), the functions of DIP SW1-6

through

SW1-8 change to IBM character generator selection.

ON ON

OFF OFF ON OFF OFF ON OFF

Table 1-21. DIP Switch 2 Settings

ON OFF

ON ON

OFF

ON OFF

OFF

CG Table 1

Table 2

2-1 2-2 Cut sheet feeder mode 2-3 2-4

1.4.2 Jumper Setting

The jumper J 1 is located on the main board and it can

NOTE: If the jumper J 1 is connected, the

Page length

1 -inch skip over perforation

Auto line feed

OFF

signal is fixed to LOW, and DC 1 /DC3 printer select control is ignored.

Description

Table 1-22. J1 Setting

Fix to “LOW”

Depend on the external signal.

12 inch 11 inch

On On

fiw

;:;-

SLCT-:?-!

SLCT-IN

OFF

off off off

signal to “LOW” level.

,.-,

1-18

Page 28

1.5 SELF TEST OPERATION

The

FX-850/l

● Control Circuit Functions

● Printer Mechanism Functions

● Print Quality

● DIP Switch Settings

Table 1-23 lists the self test operating instructions and Figure 1-8 shows the self test printing.

050 printer has the following self test (self printing) function which checks the following:

Table 1-23. Self Test Operation

REV.-A

Type-face

Draft

NLQ

Start

stop

Turn the power ON while pressing the

LINE FEED switch.

● Paper out condition.

● Press the ON-LINE switch, and turn

Turn the power ON while pressing the

the power OFF.

FORM FEED switch.

MF’12S1

Default character Shape of zero

Table Protocol mode Automatic tear-off Country

F’age Length

CSF Mode

F“erforation

Skip

fiuto

Input

Buffer

110#57-&.0X +,_

ill’#*~&-OX

“#S%& ’OX+, #% Z&’ OX+,

5Z&’OX+,-./O1234567 i39:;<=>?@ABCDE FGHIJKLMNOP~RSTUVWXYZ[ \l’’’abcdefdef ghljklmnOpqrstL~ vw~yz{l } %&’()*+,–./cU234567 s,.,...–., &’OX+,-./O134567 E19:;~:=???? @A.SCDEFGHIJKLMNOFRRSTUVWXYZ[\l”” –’abcdefghijklmnOpqrStuvwxy~{i}’”

‘OX+, -./O1234567S9:; <=>?@

-./O134S67E19:;< :=::?

()*+, )x+,

-./O134567S9:;:; =:}?}? d

Jl~34567S 9:;<=

+,_.

/O12X4S67s9:;<= ;>?

-./0123456789::

-./Ol2S4567S9:;<=> :

ROM

(Unslashed)

Italics

ESC/P

Valid

U.S.A. 1-6 ON

tich

Invalid

None

Depend on

Valid

=>?@

. . ..-..-,@

fN3CDEFGHIJ

@?4r3CDEFGHIJKLKL MNOPQRSTUVWXYZ[\lA

CAEICDEFGHIJKLMNOPQRSTUVWXYZ

I/F

>?@

AECDEFGHIJKLMN0 PQRs

GABCDEFGHIJ

AEICIC DEFGHIJliLMNOPflRSTUVWXYZ[\l”’”-Yabcde fghi.jk.lmnOpqrstuvw~:y

‘@

AECDEFGHIJKLMNOFQRSTUVWXYZ[\l ““-’abcdefgh~JklmnO pqrstLLvw~Y~{

~Bc

FGHIJKL

1–1 OFF

1-2 OFF

1-3

OFF

1-4 OFF

1-5

OFF

1-7

~-~

OFF

2-2

OFF

~-~

OFF

2-4

OFF

KLMNOPQRSTU VWXYZ[’.

OpQRSTUVWXYZ[\],. -’abcdefghijklmn

KLMNOP12RSTUVWXYZ[ \]-’

TuvwxYZ[\]’”’-’

[\l-–Tabcdefghijklmnopqrstuvwxy

1-S ON

abcdefgh IJklmnOPqrstuvw~

]’”

‘abcdefghijklmnopqrstuvwxy

opq

rSt UVWx Y2’[~ }-

‘abcdefghijk.lmnopqrstuvwxy abcdefghijklmnopqr stuvwx Yz{i}- !“

zC}*

Z{ll+ !“

Draft Mode

!''#$%&-()*+,-./ol23456789:;<=>?@ABcDEFGHIJKLMNoPQRs

!''#$X&-()*+,-./Ol23456789:;c=>?@ABCDEFGHZJKLMNOPQRBTWWKY

''#$%& #$X&-()*

$%&-()*

X&’()*+,-./O123456789 :;C=>?MBCDEFGHIJKLMNOPQRS &"()*+,-./O123456789 :;C=>?@ABCDEFGHZJKLMNOPQRSTWWKY

‘()*+, ox+, )*+,

()&+,

()*

+,-./O123456789 :;<=> ?WBCDEl?GHIJKLMNOFQRSTUVWKYZ[\l

+,-./0123456789 :;<=> ?WBCDEFGHIJKLMNOPQR

+,-./Ofi3456789 :;C=>?@~CDE~~JK~O=~

-./O123458789:;< =>?@ABCDEFGH1JKLMNOPQRS

-./O123456769:; <=>?@ABCDEFGHIJKLMNOFQR

-./012345678g:; <=>?@ABCDE~JKLMN()~S

NLQ

!“#s%&’()*+ !“#s%&’()*+ “tlS%&’OX+, -./O1234567B9:; #sz&’()*+,-./O1234567

s%& J()*+, %&’ OX+,

&’(); +,-./O1234567S9:; <=>?@ABCDEFGHIJ

‘08+,

-./O1234S67E9:;< =>?@ABCDEFGHIJ

-./O1234567S9:; <=>?@ABCDEFGHIJ

)*+,

-./01234S67S9:;

,-./O123456789SI< =>?@ABCDEFGHIJ

,-./O123456789:;

-./01234567e9:;<

-./O123456789:;<

<=>7@ABCDEFGHIJKLIINOpQRS

<=>?@

S9:;<=>?@ASCDEFGHIJ

=>?@

fiBCDEFGHIJKLllNOPQRS TUVWXYZ[\ln–’abcde fghijklmnopqrstu VWXY

RBCDEFGHI

=>?@ABCDEFGHIJ KLMNOPQRSTUVWXYZ[ \]”-

IlBCDEFGHIJ

KLMNOPQRSTUVWXYZ[

NLQ

TUVWXYZ[\l’-’abcdef@jkhnn

BTUVWKYZ[\l--’abcdefsMjkhnopqrstuvwxyz{

TWWXYZC\l---abcdef~

(Roman) Mode

KLMNOPQRSTUVWXYZ[

JKLMNOPQRSTUVWXYZ[

KLMNOPQRSTUVWXYZ[

KLMNOP12RSTUVWXYZ[ \] A-’

KLMNOPQRSTUVWXYZ[

TUVWXYZ[\]A-’abcdef ghijklmnopqrstuvwx Yz{l}+ !“

(Saris-Serif) Mode

TWWXYZ[\:-T’abcdefgMjkhn

Z[\l -

BTWWXYZ[\]”-TabcdefghiJkhn

abcdefghLlklmomrstuvwxy

‘abode

“

Z[\]--’abodefghijklm

TUVWXYZ[\l--’abcdefghijkbn

Z[\l--’abcdefghi@nnomretuvwxyz{l}-

\]A–’abcdefghijk lmnopqrstuvwx

\ln

‘abcdefghti”klmnopqrstuvwxy

\lA-

‘abcdefghijklmnopqrstuvwxyz(

‘abcdefghti”klmnopqrstuvwxyz{;}

● bcdefghti”klmnopqrstuvwxyz{:}-

\]A ‘abcdefghijklmnopqrstuvwxyz{:}+

\l*-%bcdefghti”klmnopqrstu

\]a–’abcdefghijklmnopqr

Figure 1-8. Self Test Printing

1-19

omratuvwx

fghkikhunomrstuwvxyz

opgretuvwxyz{

omrstuvwxyz{!}

opgrstuvwxyz{i}-

omretuwxyz{l}-

!}- !“

opgretuvwxyz{j}- !“’

VWXYZC}-

stuvwxyz{;

!“’

Page 29

REV.-A

1.6 HEXADECIMAL DUMP FUNCTION

The hexadecimal dump function causes the printer to print the received data in hexadecimal. The printer

prints 16 values in hexadecimal, followed by the corresponding ASCII characters, on one line. If there is no corresponding printable character for a value (i.e. a control code), a period (.) is printed. Any

remaining data (less than 16 values) can be printed by operating the ON LINE switch. No panel settings can be made in the hexadecimal dump mode. This function makes it easy for technician to identify source of communications problems between the printer and computer. Table 1-24 lists the self test operating instructions and Figure 1-9 shows the hexadecimal dump printing.

Table 1-24. Hexadecimal Dump Operation

the

Function Operation

Hexadecimal dump mode

CIata 0,:,0,:,

(:>0(>1 (:)002 0003 00<.,4 ,)0(:)5

0006 0007

0008 0009 OOOA C,ooe ,:,,:,OC ,j(j,jl)

OWE

OOOF 0010 0011 0012 0<113 0014 ,:,015

0016 0017

0010 ljo19 ,:, C,l iIOIB O(>1C CJOID Oc:DIE ,>,:,1,=

0020

0021 ,:,022

0023 0(>24

0025 0026

,:,027 ,5028 0029 OCUA

O(jzn

O02C OC13J

O(;12E O02F

0030

0(:,31 0032

0033

CIOT4

0035

0036

0037

CMHB

0039

OO?.la ,>,]y

Turn the power ON while

pressing both the LINE FEED and FORM FEED switches

Dump Mode

IB 40 00 IB 55 00 IB .33 18 7e 01 IB 57 00

S2 20 31 OD

#:,

(:,&

20 2,)

7T OD

2,>

61 6E 64 20 46 58 2D

&,5

2,:,

73 63 72 b9 61 6C

72 6? 78 20 39 2D 70 69

6C 20 70 72 69 6E 74 65 72 73 20 74 68 61 74

OA 20 20 20 70 72 69 6E 74

6D 61 78 69 6D 75 6D 20 6F 66 20 32 36 34 20 4.3

50 53 2E 20 20 45 b? 74 6S 65 72 20 6D 6F 64 65 6C W 46 5S 2D 3S 35 20 63 bF bC 75 6D 6E 77 20 6F 72 20 46 58 2D OA 20 20 20 31 30 35 30 20 77 69 74 60 20 31 33 36 20 6S 6F 6C 75 6D 6E 73 20 63 61 6E 20 62 65

73 65 6C 65 63 74 65 64 20 61 63 63 6F 72 64

b~ 6E 67 20 74 6F 20 79 6F 75 72 20 72 65 71 75

72 65 6D 6S 6E 74 73 2E 20 20 S4 68 65 OD OA 20 20 20 6D 61 b9 6E 20 66 65 61 74 73 72 65 73 20 61 72

06 OD OA 20 b9 6E 74 69 6E 67 20 73 70 63 65 64 36 20 20 32

36 34 20 64

20 45 6C 69 74 65 29 OD

20 20

20 20 20 20 20 3Z Z~ 30 20 43 50 53 20 28 44 7Z 61 .% 74 20 61 6E 64 20 50 6? 63 61 29 OD 06 OD

of+

20 20 2,> 2A 20 41 64 76 61 &E 63 65 64 ~o 70 61 70 65

6E 63 74 69 6F 6E 7S 3& 20 20 41 75 74 6F 20 74 6S 61 72 2D 6F 66 66 OD OA 20 20 20 20 20 20 20

20 20 20 20 20 20 20 20 20 20

2<)

41 75 74 6F 20 6C 6F 61 64 69 6E 67 oD oA

20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20

~,> ZIJ

20 20 20 ~. 20 20 20 q~ 75 ,4 # 20 62

.53

6B 2D 6F 75 74 OD OR 20 20 20 20 20 20 20 20

20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 2(]

20 20 20

4D 69 63 72 6F

74 OD

79 70 65 7?

20 70 72 69 6E 74 20 6D 6F 64 65 20 63 61 6E

62 65 20 73 65 6C 6.5 6.3 74 65 64 20 64 69 72 63 63 74 6C 79 20 66 72 6F bD 20 74 60 65 20 66

6F 6E 74 OD OA 20 20 20 20 20 70 61 6E 65 6C

2E 20 20 4F 6E 6.3 65 20 61 20 6D 6F 64 63 20

7Z 20 7Z 63 6C 65 63 74 69 64 2C 20 &9 74 20

77 20 73 74 6F 72 6S 64 20 69 6E 20 74 68 63

6E 6F 6E 2D 76 6F 6C 61 74 69 6C 63 20 6D 65

bD 6F 72 79 2C OD 06 20 20 20 20 20 61 6E 64 20

73 20 73 65 6C 65 63 74 65 64 20 77 6B 65 6E

20 74 68 63 20 70 72 69 6E 74 65 72 20 70 6F 77

65 72

OD 20 64

b5 20

69 73 20’ 74 75 72 6E 6S 64 20 6F 6E 2E

OA OD .56

bF 6E 74 73 20 2S 52 6F 6D 61 6E 20 61 6E

20 57 61 6E 73 2D 71 65 72 69 66 29 ~o 61 7Z

7Z 74 61 6E 64 61 72 64 2E OD 06 OD OA 20

oia OD

2,>

31 2E 31

OFI 20 20 20

6!5 2[>

61 77 20 66

2,)

50 53 20 2S 44 72 61 66 74 20 61 6E

20 20 20 20 20 20 20 20 20 20 20 20 20

72 20 68 61 6E 64 AC 69 6E 67 20 66 75

21-1 20

20 20 20 20 20 20 20 20 20 20 20

Zf)

20 20 ~o

I>D OA

20 20 20 2A 20 53 65 6C 65 63 54

20 66

7!3

6E 63 74 69 6F 6E 20 20 41 6E

OFI

20 20 20 2A 20 S4 77 6F 20 4E 4C 51

IE 00 OD oA 12

IEI

4D 20 20 20 43 48 41 50 54

OR W 20

54 68 65 20 46 5S 2D 3S .35

?.0

20 77 69 74 68 20 3S

20 20 20 4D 61 78 2E 20 70 72

2!3

20 20

2,>

~1 64 6A 75 73 74 60 65 6E

2!>

2,>

.20 b4

.5E

Z(j 3) 20 20 20

2e 31 2E OD OA

20 4& 65 61 74 75 72

,31

30 35 30

6F 74 20 6D 61 74

20 74 65 72 6D 67 6E

2,>

61 74 20 61 20

.5F 6C

6C 6F 77 73 30

0(4

20 20 20 20 20 20

213 20

Zrj 20 20 20 Zcl

IEI

.20

70 00

61 72

21J 20

stop

● Press the ON LINE switch to

set the printer off line. Next, turn off the printer.

.@.

. .

. . . . . .

.x.

.W.

1 . . . . ( 1 . .

. .

1.1 es. . O ● nd FX-105O ar e serial dot mat

rix 9-pin termin

● l

printwe

print at ●

. . maximum of 264 C Ps .

Either

?.0 OD

6.1

FX-850

columns or FX-.

1050 with 13

6 columns

selectmd accord ing to your irmmmnts.

main

● ra as fol lows

. . . .

inting speed

64 CPS ( d Elite) . .

220

●

ft and Pica) . . .

* Advancwd

● per handl inq tu

nctions:

ear-off . .

Auto

ck-out

. .

Micro

. . . .

YPR function (An

y print

swlected

● ctly from th~ f

rent. .

Dnc=

is 8Ql Qcted, it is

stored

no”-volati

mory,

. .

soloctmd

thm printer POW

er is

. . . .

fonts (Roman ● n

Sans-seri

e standard. . . . .

loading. .

turn-d

CHAPT

Featur

Thm FX-8S

that

mod-

with

can b.

rmqu

Thin. .

features

Max . pr

: 2

Draft ● n

CPS

( Dr

auto t

Auto ba

adjustmmn

i SO1OCT

mod-

can dir

panel

●

mod=

in the

● nd

wh.”

o“.

* Two NLQ

f ) ● r

f ---

.— -

Figure 1-9. Hexadecimal Dump Printing

1-20

Page 30

REV.-A

1.7 PRINTER INITIALIZATION

There are two initialization methods: hardware initialization and software initialization.

1.7.1 Hardware Initialization

This type of initialization occurs when printer power is turned on or when the printer receives the INIT signal from the host computer via the 8-bit parallel interface. When printer is initialized in this way, it performs the following actions:

● Initializes printer mechanism.

● Sets the on-line mode.

● Sets the page length to 11 or 12 inches according to the DIP switch.

● Clears the input data buffer and print buffer.

● Read DIP switch and jumper settings.

● Sets the print mode according to the DIP switch and the non-volatile memory set by control panel.

● Sets printer selections to their default values

1.7.2 Software Initialization

This type of initialization occurs when the printer receives command

(ESC @)

via software.

When the printer is initialized in this way, it performs the following actions:

● Clears the print buffer.

● Sets printer selections to their default values.

NOTE: The printer’s default values are as follows:

Page Position Preset paper position becomes top of form position Left and Right Margin

Released Line Spacing 1/6 inches Vertical Tab Position

Cleared Horizontal Tab Position Every 8 characters (relative) VFU Channel Channel O Family Number of Type Style Roman (Family Number O) Downloaded Characters Deselected: Software initialize

Cleared:

Hardware initialize Justification Left justification Character Per Inch Bit Image Mode Assignment

Printing Effects

ESC

Z =

Cleared

K =

ESC

X 3

X O,

ESC

L =

ESC

X 1,

ESC

X 2,

●

1-21

Page 31

REV.-A

1.8 BUZZER OPERATION AND ERROR CONDITIONS

This section describes the buzzer operation and error conditions of the printer.

1.8.1 Buzzer Operation

The buzzer beeps as follows:

●

When a BEL code is sent to the printer, the buzzer sounds for 0.1 second. When the following error has occured:

●

Carriage Trouble . . . . . . . . . . . . . . . . . . . . .

Paper End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Abnormal Voltage . . . . . . . . . . . . . . . . . . .

RAM Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Short circuited printhead

drive transistor . . . . . . . . . . . . . . . . . . . . . . . .

●

Recognition of the control panel operation Beeps once in the following cases:

Self print mode Hexadecimal dump mode Print mode setting

●

Proportional space alternation Beeps once when old proportional space is selected and twice new one is selected.

Beeps 6 times, pausing briefly after 3rd beep. Beeps 20 times, pausing briefly after every 4 beeps. Beeps 5 times, pausing every beep. Beeps 6 to 10 times, pausing briefly after every 2 beeps. The beeps

warn which RAM is incorrect as follows:

6 times . . . . . . . .

8 times . . . . . . . .

10 times . . . . .

Beeps 10 times, pausing after every beep.

Internal RAM (CPU) Lower Address RAM Upper Address RAM

(IC) (IC)

1.8.2

Error Conditions

The printer enters an error state and sets the ERROR signal LOW and BUSY signal HIGH to prohibit

reception of data when any of the following states occurs.

●

The carriage home signal is not detected after the printer mechanism has been initialized (carriage error).

●

The carriage home position is detected during printing (carriage error). The printer is set OFF LINE using the ON LINE switch.

●

An internal DC voltage drop is detected (abnormal voltage is detected).

●

During initialization, an error is detected by a READ/WRITE check of the RAM in the control circuit.

●

printhead drive transistor is shorted.

Interface signal PE is also set HIGH in addition to the above error sequence when any of the following states occurs.

● The printhead is moved outside of the printable area by a forms override function (paper end state).

● The paper end state continues after the cut sheet feeder mode has been set and paper loading has

been completed (paper end state).

1-22

Page 32

REV.-A

1.9 PAPER HANDLING FUNCTIONS

The push tractor unit can be easily mounted or removed using the paper release lever. Either continuous

paper or cut sheets can be easily selected by operating the LOAD/EJECT switch and paper release lever.

Various paper handling functions are described below.

1.9.1 Autoloading and Backout Function

Loading and ejecting a cut sheet:

When no sheet is loaded, push the paper release lever backward, load the sheet along the sheet guide,

TOF

and press the LOAD/EJECT switch so that the sheet is automatically fed up to the

When the LOAD/EJECT switch is pressed with a sheet loaded, the sheet will be ejected. Loading and ejecting continuous paper (auto back-out): Pull the paper release lever forward, load continuous paper onto the push tractor unit, and press the

TOF

LOAD/EJECT switch so that the paper is automatically fed up to the

When the LOAD/EJECT switch is pressed with the paper loaded, the paper is fed in the reverse direction

(ejected) up to the tractor waiting position (auto back-out). If the paper cannot be fed in the reverse direction at 1/6 inch line spacing, the paper ejection process will be terminated.

position.

1.9.2 Short Tear-Off Function

For continuous paper (when the paper release lever is moved to the tractor feeder side), the paper will be automatically fed to the perforations (tear-off position) when printing is completed, no data is being received from the host computer, and the print buffer is empty. At this time, the micro-adjustment set function becomes valid so that the tear-off position can be adjusted accurately using the LF and FF switches. The adjusted tear-off position is stored in the memory and remains valid even after the

printer power is turned off, so that the paper will be automatically fed to that position when the tear-off function is executed later. After the paper is cut off, the paper is automatically returned to the previous position by sending new

print data or setting the printer OFF LINE.

1.9.3 Micro-Adjustment Top-of-Form Set Function

After paper loading is completed, set the printer ON LINE by pressing the ON LINE switch. In this state, the paper loading position can be finely adjusted by operating the LF and FF switches. When the printer is in the micro adjustment mode, the ON LINE LED on the panel blinks. The paper loading position can be adjusted individually for the friction feed, tractor feed, and cut sheet feeder modes, and the adjusted values are stored in the memory. The value for the tractor feed remains valid even after the printer power is turned off. NOTE: If paper is already loaded when the printer power is turned on, the position of the paper will

TOF

be recognized as the

position.

TOF

1-23

Page 33

REV.-A

1.10 PAPER END DETECTION

The paper end is detected by the PE sensor. When the paper end is detected, the printer indicates it

by lighting the lamp on the control panel and ringing the buzzer. The printer sets the parallel interface

signals

After the paper end is detected, load a new sheet and press the ON LINE switch so that the printer enters

the ON LINE mode. Figure 1-10 shows the paper end detection position.

as shown below, and enters the OFF LINE mode.

● BUSY signal: HIGH

● PE signal:

. ERROR signal: LOW

HIGH

Approx.

59. 9mm

.-.

ABC

Printable

.------

Paper End Detection

ABC

— —

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

Area

Posltlon

XYZ

1...

---

Fig. 1-10. Paper End Detection Position

1-24

Page 34

1.11 MAIN COMPONENTS

The

FX-850/l

Model-3B 10\3B60 printer mechanism

●

PEGX

●

● PGPNL board (control panel)

PEBFIL-11

●

● Housing

Figure 1-11 shows the

050 printer includes the following major subassemblies:

board (main board)

board (filter board) and power transformer

FX-850/l

050 component locations.

— Power Transformer

FIEV.-A

Pape Unit

PEBFIL-ll–

Board

Tension

Plunger–

Printhead

PEGX

Board

Paper Feed Motor

Carriage Motor

FX-850

NOTE: In

FX-1 050

FX-850, the paper tension unit and push tractor unit are excluded.

Figure 1-11. Component Locations

1-25

Page 35

REV.-A

1.11.1

The range of usable paper, mechanisms are based on printer mechanisms Model-53 10/5360 for the pull tractor unit or cut sheet feeder can be mounted to the mechanism. Since the construction of these

printer mechanisms are simplified, maintenance is very easy.

Printer Mechanism

Model-3B

(FX-850)/3B60 (FX-1

050) are 9-pin dot matrix printer mechanisms, and feature a wide

light weight, compact size, and advanced paper handling function. These

LQ-850/l

050. The optional

F’”

.-,

Figure 1-12.

Figure 1-13.

Model-3B10

Model-3B60

(FX-850)

(FX-105O)

●

1-26

Page 36

REV.-A

1.11.2 PEGX Board (Main Board)

PEGX

The

board is the main board, and interfaces the printer to the host computer, controls the printer

mechanism and control panel, and supplies DC voltage. Since the complicated logic circuit section is

PEGX

implemented using gate arrays, the Driver circuits for the motors, sensors, and on the Universal

Gate

Memory

PEGX

board are:

STK6722HZ (IC2A)......... . . . . . . . . . . . . . . . . . . . .

●

NJM2355 (lCIA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

●

Array

E05A15HA (IC3A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

●

E05A16GA (IC7A)......... . . . . . . . . . . . . . . . . . . . . . . .

●

EP-ROM (IC4A)

●

S-RAM (IC5A and 6A).. . . . . . . . . . . . . . . . . . . . . . . . .

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

board features very compact construction.

printhead are also included on this board. Other main

Carriage Motor Driver

Switching Regulator

Paper Feed and Carriage

and

Printhead

driver

Motors controller,

Host computer interface

Program ROM, 256 K-bit Buffer and Back up memory

ICS

GA (E05A15HA)

CPU (PPD7810HG)

Figure 1-14.

PEGX

S-RAM (8 KBX2)

%&h

Board

Lithium Battery

GA(E05A16GA)

DIP

SW2

SW1

1-27

Page 37

REV.-A

1.11.3 PEBFIL-11 Board (Filter Board) and Power Transformer

.K !%

The DC power supply circuit is on the main board. The

PEBFIL-11

board and power transformer remove noise from the AC power supply section and drop the AC input voltage. Figure 1-15 shows the

PEBFIL-11

board and power transformer.

220/240V

t--

120V

220V

(240V)

120V

Figure 1-15.

PEBFIL-11

Board and Power Transformer

1-28

Page 38

REV.-A

1.11.4 PGPNL Board (Control Panel)

LEDs,

There are 11

seven switches, and a buzzer on the control panel. Among these, seven

three switches are for the panel setting function

(SelecType).

Font, character pitch, and condensed mode

LEDs

and

can be selected directly using these switches. Settings set using the SelecType mode are stored in the memory and are set on the panel when the printer hardware is initialized.

Normally, the SelecType

function is valid when not printing. The printers have various other functions that can be selected from the control panel.

Figure 1-16 shows the control panel.

Switches

ON LINE

FORM FEED

LINE FEED

Figure 1-16. Control Panel

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

This button controls the printer’s on line/off line status. When the printer is on

line, ON LINE light is on and the

printer can receive and print data from the computer. When this lamp is flickering, the micro adjustment function can be used.

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

When the printer is off line, press this button to eject a

single sheet of paper or to advance continuous paper to the top of the next page.

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

When the printer is off line, press this button to advance the paper one line, or hold it down to advance the paper continuously.

1-29

Page 39

REV.-A

LOAD/EJECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

This button is used to feed the paper to the loading position, or to eject paper when paper is already loaded. Paper is

ejected forward if the paper release lever is set to the single sheet position, and is ejected backward (removed from the paper path) if the release lever is set to the continuous paper position.

FONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

This button is used to select

SERIF, or DRAFT mode. The yellow indicator light shows the selected font.

PITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONDENSED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

This button is used to select 10 CPI, 12 CPI, or PS (proportional) spacing. The yellow indicator light shows the selected pitch. This button is used to select or deselect the condensed

mode. The yellow indicator light is on when the printer is in the condensed mode. In this mode all characters are printed at approximately 60% of their normal width.

LEDs

POWER (Green) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

READY (Green) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

On when the POWER switch is on, and power is supplied. On when the printer is ready to accept input data. This LED flickers while data is printed.

PAPER OUT (Red) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

On when the paper end sensor detects that the printer is out of paper.

NLQ

ROMAN,

NLQ

SANS-

““

;.-

. ._.’

1-30

Page 40

REV.-A

1.11.5 Housing

The housing consists mainly of the upper and lower cases. The components described in the former

sections (1. 11.1 through 1.11 .3) are accommodated in the lower case. Other components are the paper feed knob, paper separator, and printer cover. The DIP switch position is changed from the rear side of the printer (conventional) to the right side. A removable cover is located on the upper case so that the DIP switches on the optional board can be set without removing the upper case.

Figure 1-17 shows the upper and lower cases.

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

FX-850

FX-1 050

Figure 1-17. Housing

1-31

Page 41

CHAPTER 2

OPERATING PRINCIPLES

REV.-A

2.1 GENERAL

2.1.1 Cable Connections

2.2 PRINTER MECHANISM OPERATION

2.2.1 Printhead

2.2.2 Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.3 Home Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.4 Ribbon Feed Mechanism

2.2.5 Paper Feed Mechanism

2.3 CIRCUIT OPERATION

2.3.1 General

2.3.2 Power Supply Circuit

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

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

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

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

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

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

2.2.5.1 Push Tractor Feeding Method . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.2.5.2 Friciton Feeding Method

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

Information

2.3.1.1

2.3.1.2

2.3.1.3

2.3.2.1 Filter Circuit

Power Supply Section Control Circuit Section Memory Mapping

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

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

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

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

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

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

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

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

2-5

2-5 2-6 2-7

2-9 2-10 2-1o 2-1o 2-12 2-14 2-15 2-1 e

2.3.2.2 Transformer

2.3.2.3 Rectifier and Smoothing Circuit . . . . . . . . . . . . . . . . . . . . 2-17

2.3.2.4 Chopper-Type Switching Regulator Circuit

2.3.2.5 Pulse-Width Modulation

+5V

2.3.2.6

2.3.2.7

2.3.2.8 + 12V DC Supply Circuit

2.3.2.9 Vx Voltage Supply Circuit

2.3.3 Main

2.3.4 Main Circuit Operation

IC Function

2.3.3.1 CPU Functions

2.3.3.2 E05A15HA Gate Array Functions ................ 2-29

2.3.3.3 E05A16GA Gate Array Functions ................ 2-31

2.3.4.1 Reset Circuit

2.3.4.2 Interface Control Circuit

2.3.4.3 DIP Switch Circuit and Jumpers .................. 2-37

Regulator Circuit

+24V

Regulator Circuit

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

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

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

(PWM)

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

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

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

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

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

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

Circuit ..... 2-19

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

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

2-16

2-18

2-21 2-23 2-25 2-26 2-27 2-27

2-33 2-33 2-34

2.3.4.4 Memory Back-up Circuit

2-i

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

2-38

Page 42

REV.-A

2.3.4.5 Printer Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39

2.3.5 Printer Mechanism Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41

2.3.5.1 Carriage Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41

2.3.5.2 Carriage Motor Software Control ................. 2-49

2.3.5.3 Paper Feed Control Circuit

2.3.5.4 Plunger Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58

2.3.5.5 Printhead Control Circuit

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

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

2-53

2-60

LIST OF FIGURES

Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Carriage Mechanism Figure 2-5. Figure 2-6. Figure 2-7. Figure 2-8. Figure 2-9. Control Circuit Block Diagram Figure 2-10. Memory Mapping Figure 2-11. Figure 2-12. Transformer Circuit Figure 2-13. Rectifier and Smoothing Circuit Figure 2-14. Step-Down Circuit Figure 2-15. Step-Down Timings Figure 2-16. NJ M2355 Internal Circuit

Figure 2-17. Output Transistor Drive Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Cable Connections Print Mechanism Block Diagram

Printhead Mechanism

Ribbon Feed Mechanism Push Tractor Feeding Method Friction Feeding Method

Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

PEBFIL-11

Filter Circuit Board

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

2-1 2-3 2-4 2-5 2-6 2-8 2-9

2-12 2-14 2-16 2-16

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

Figure 2-18.

Figure 2-19. Oscillator Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Figure 2-20. Constant-Voltage Control Figure 2-21. AMP 1 Output Figure 2-22.. Figure 2-23. Constant-Voltage Control Figure 2-24. Over-Current Protection (OCP)

Figure 2-25. + 12V DC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25

Figure 2-26. Vx Voltage Circuit

Figure 2-27. Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.33

Figure 2-28. Interface Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . 2-34

+5V

Regulator Circuit

+24V

Regulator Circuit

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

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

(+5V

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

(+24V

DC) . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

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

Z.ii

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

DC)

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

2-21

2-22

2-23

2-24

2-26

Page 43

REV.-A

Figure 2-29. Data Transmission Timing Figure 2-30. Serial Data Flow

Figure 2-31. DIP Switch Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-32. Memory Back-up Circuit

Figure 2-33. Carriage Motor Control Block Diagram . . . . . . . . . . . . . . . . . . . . . . . 2-41

Figure 2-34. GA(E05A15HA) Operation Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

Figure 2-35. GA(E05A16GA) Operation Diagram

Figure 2-36. Carriage Motor Drive Circuit Block Diagram ............. 2-44

Figure 2-37. Carriage Motor Drive Sequence

Figure 2-38. Carriage Motor Drive Circuit Block Diagram ............. 2-47

Figure 2-39. Carriage Motor Control Circuit

Figure 2-40. High Speed Skip Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50

Figure 2-41. Home Position Seek Operation

Figure 2-42. Home Position Seek Phase States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52

Figure 2-43. Paper Feed Motor Drive Circuit Block Diagram . . . . . . . 2-53

Figure 2-44. GA(E05A15HA) Function for Paper Feed Motor ....... 2-54

Figure 2-45. Phase Excitation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2-46. Paper Loading/Ejecting Operation Figure 2-47. Plunger Mechanism

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

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

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

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

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

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

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

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

2-35 2-36

2-37

2-38

2-43

2-45

2-48

2-51

2-54

2-57

2-58 Figure 2-48. Plunger Drive Circuit

Figure 2-49. Relationship Between Transistors and Plunger ........ 2-59

Figure 2-50. Printhead Central Circuit Block Diagram ................... 2-60

Figure 2-51. Print Drive Pulse Width Figure 2-52. Half-dot Protection Circuit

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

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

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

2-58

2-61

2-62

LIST OF TABLES

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

Board Connector Summary Power Supply Application Pin Function of CPU Pin Function fo GA(E05A15HA) Pin Function of ST-RAM Conditions 2-2 phase Excitation

1-2 phase Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GA(E05A16GA)

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

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

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

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

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

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

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

2-2

2-11

2-27

2-29

2-38

2-46

Table 2-9.

Table 2-10.

Table 2-11.

Carriage Speed Modes

Acceleration/Deceleration Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-49

2-2 phase Excitation

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

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

2-iii

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

. ,,,,,,,,

2-49

2-55

Page 44

REV.-A

Table 2-12. Paper Feed Motor Speed

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

Table 2-13. Paper Feed Direction and Operation

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

2-55 2-55

Table 2-14. Acceleration/Deceleration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-56

Table 2-15. Relationship Between GA Ports and

piunger Voltage

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

2-59

2-iv

Page 45

REV.-A

2.1 GENERAL

This chapter describes the operation of each component. Section 2.2 and the subsequent sections give

more detailed descriptions of each component.

2.1.1 Cable Connections

PEGX

The printer components are connected to and controlled by the interconnection of the components.

board. Figure 2-1 shows the

Power

Transformer

120V

220V 240V

PEGFLU board

120V

220/240V

Model-3Bl O/3B60

PEGX

board

PGPNL

board

(c%%’)

AC120V

AC220V AC240V

Host computer

Figure 2-1. Cable Connections

‘

2-1

Page 46

REV.-A Each component is connected to one of the connectors on the

2-1. Table 2-1 describes the connectors.

Table 2-1 Board Connector Summary

PEGX

board, which are listed in Table

“:,

Circuit

Board

PEGX

board

Connector

Number

CN 1

CN2

CN3

CN4

CN5

CN6

CN7

Description

Standard 8-bit parallel interface connector. Used for data transfer from the host computer.

Connector for the optional interface board. Used for data transfer from the host computer. When the optional interface board is mounted, CN 1 is

invalid. Supplies two step-down AC voltages from the

power supply transformer to the DC regulator

circuit on the

Drives the printhead needles. Drives the plunger that opens and shuts the

paper bail on the printer mechanism.

Transfers the state of the carriage home position sensor from the printer mechanism to the control circuit on the

Transfers the state of the paper end sensor from the printer mechanism to the control circuit on the

PEGX

board.

PEGX

board.

Number

of Pins

12 Table A-1 8

Reference

Table

Table A-1 5

Table A-1 6

Table A-1 7

Table A-1 9

Table A-20

Table A-2 1

‘(,.’

CN8 CN9

CN 10

CN 11

Drives the paper feed motor. Drives the carriage motor.

Transfers the state of the release lever from the

printer mechanism to the control circuit on the

PEGX

board.

Interface connector between the and the control panel.

PEGX

board

6 9

20 Table A-25

Table A-22

Table A-23

Table A-24

2-2

Page 47

REV.-A

2.2 PRINTER MECHANISM OPERATION

The printer mechanism is a 9-pin serial dot matrix impact mechanism. Figure 2-2 shows a drawing of the mechanism. The name in the rectangles indicate relationship between each mechanism and the control circuit on the PEGX board.

E05A15HA

CN7

Plunger

Ribbon

Feed

E05A15HA

Paper End

v“’’’’” “’”

)Kl

Home Position

CN6

Figure 2-2. Printer Mechanism Block Diagram

Sensor

Platen

‘r““

Printhead

Drive

Circuit

----

“ ‘ “ ‘

E05A15HA

““I

Carriage Motor Control

Circuit

Carriage Motor

Cantrol

Circuit

Feed Motor

The printer mechanism is composed of the following:

Printhead

●

● Carriage Mechanism

● Home Position Sensor

● Ribbon Feed Mechanism

● Paper Feed Mechanism

2-3

Page 48

REV.-A

2.2.1 Printhead

The printhead is an electromagnetic induction 9-pin serial dot head. Nine dot wires are driven individually to print a dot pattern on the paper, positioned between the platen and ribbon, by hitting

the ink ribbon against the paper and the platen. Print data expanded on the PEGX board is converted

into dot-image data for one vertical row, and output to the

printhead by the printhead drive circuit. A

character is printed by serially printing the dot patterns for each vertical row in the horizontal direction as the carriage moves. Figure 2-3 shows the

Dot Wire

W~re Reaettmg

Stopper

Spring

printhead mechanism

Ribbon

Platen

Mask

P-~,

*,.

Actuating Plate Spring

Figure 2-3. Printhead Mechanism

Paper

2-4

Page 49

REV.-A

2.2.2 Carria9e Mechanism

the

The carria9e is driven by the carria9e motor via a timin9 belt, and moves left and right alon9 the platen.

Since a stepPer motor is used for the

position.

The carriage motor is controlled by a

carria9e motor,

very simPle, oPen-lOOp sYstem-

carria9e can be stopped and started at any

Figure 2-4 shows the carria9e mechanism.

Carria9e Mechanism

2.2.3

Home Position Sensor

Figure 2-4.

The home position sensor detects the home position of the

when the printer is initialized. The

the

Carriz19f2 motor pOSitiOn.

control

circuit stores the home position, which is referenced to control

carria9e. A home-Position seek is performed

2-5

Page 50

REV.-A

2.2.4 Ribbon Feed Mechanism

Carriage movement is conveyed to the series of gears in the ribbon feed mechanism. The ribbon feed mechanism converts bidirectional horizontal carriage movement into single directional rotational movement so that the ribbon can be taken up during printing. Figure 2-5 shows the ribbon feed mechanism.

ibbon

Breaking

ping

f-:

Planet

Figure 2-5. Ribbon

Feed Mechanism

2-6

Page 51

REV.-A

2.2.5 Paper Feed Mechanism

The paper feed mechanism is composed of the paper feed motor, platen, push tractor unit, paper tension

unit, and release mechanism. Either the friction feed or tractor feed system can be selected depending on the paper used. (There are two paper entrances. One is for friction feed and the other is for tractor feed.) Rotational movement of the paper feed motor is conveyed to the platen in the case of friction

feed, and to the push tractor unit (the platen also rotates) in the case of tractor feed. The conveyance

mechanisms are switched using the release lever. The paper tension unit is mounted at the top of the platen, and is rotated by the paper feed motor. The paper ejection is assisted by friction between the platen and the paper tension unit.

2-7

Page 52

REV.-A

2.2.5.1 Push Tractor Feeding Method (Figure 2-6) Paper feeding is performed by driving the paper feed motor with the paper release lever set forward to load fan-fold paper into the tractor unit. A paper tension unit is installed at the exit of the case to prevent irregular paper feeding and slackening.

Paper Release Lever

K“::, j-,

Paper Tension Roller Gear

PaperTensionRoller~\-T

Transmission Gear - n

Platen

Gear

‘::::s~

Paper Feed Transmission Gear

Paper Feed Motor Pinion Gear

(i) Side View

(ii) Top View

(a) Gear Arrangement

“..,”

‘

“

.,,

Paper

Paper Tension Roller,

Holding Roller

Figure 2-6. Push Tractor Feeding Method

(b)

Paper Path

Paper

Push-Tractor

----

Paper Feed Roller (Release State)

2-8

Page 53

REV.-A

2.2.5.2. Friction Feeding Method (Figure 2-7) The paper is loaded from the upper paper entrance with the paper release lever set backward. The paper is held against the platen by the paper feed roller and is fed due to friction with the platen and paper feed roller. As in the push tractor feed method, the paper tension unit is used to prevent paper feed problems.

Paper Release Lever

Paper Tension Roller Gear

paDer

-.ens!!?n:o’!erw?!i~

_fransmisslon Uear

.(h

~g@~~%en

m, . . ..r.c. ar

I-

Im,s,

--”.

*“

Tractor Transmission Gear

~lrAc-Rh

-’

Paper Feed Transmission Gear

(O’--*

Paper

(i) Side View

(ii) Top View

(a)

Gear Arrangement

Feed ~otor pinion

Tractor Gear

~ear” q

)

Friction/Tractol

Sensor

Paper Tension Support Roller

Holding

Roller

\o’”

Q!#

plate>

Figure 2-7. Friction Feeding Method

;;*

~-”

Paper Feed Roller

(b)

Platen Path

2-9

..-

/“

/’

Paper End Sensor

(Friction State)

Paper

Page 54

REV.-A

2.3 CIRCUIT OPERATION

$’2.

---

The main circuits of the printer are on the power transformer.

2.3.1 General Information

PEGX

The

and the control panel, and process data from the host computer.

2.3.1.1 Power Supply Section Figure 2-8 shows a block diagram of the power supply section.

board includes the various circuits that supply DC voltage, control all of the printer operations

Filter

1-[

sten-

PEGX

board, the control panel, the

;~gulator

PEBFIL-11

board, and the

WVU (+36VDC)

I-F

Figure 2-8. Power Supply Block Diagram

Half-wave

rectifier and Smooth in Circuit

+24

egulator

ircuit

V;lta

Circuit

Voltage

... -

;

2-10

Page 55

REV.-A

The power supply circuit is divided into the

PEGX

board,

PEBFIL-11

board, and power supply transformer. This circuit converts the AC voltage from the step-down transformer into the DC voltage required to drive the printer mechanism and operate the control circuits. The AC voltage from outside the printer

VAC

is input to the step-down transformer via the filter circuit. The AC voltage is converted to 26

VAC

The 26

by the transformer, and is input to the power supply circuit on the

VAC

is converted to approximately 36 VDC by the full-wave rectifier and smoothing circuit. The

unregulated DC voltage and the regulated +24

VDC and + 5 VDC (total of 3 supplies) are supplied to

PEGX

board.

and

the control circuit. Switching regulator IC NJ M2355 (1A) controls the chopper-type switching regulator

circuits for +24

VDC and +5

VDC.

The +36 VDC and +5 VDC are supplied to the Vx voltage circuit, converted to the Vx voltage, and

supplied to the reset circuit.

VAC

The 12

is converted to unregulated 12 VDC by the positive half-wave rectifier and the smoothing

circuit, and is supplied to the control circuit.

Table 2-2. Power Supply Application

Voltage

+5V

Logic circuit Plunger solenoid holding voltage Paper feed motor holding voltage Signal pull-up voltage

Application

+36V

(vu)

+24V I

(Vp)

+ 12V

- 12V

Plunger solenoid driving voltage Paper feed motor driving voltage

Carriage motor driving voltage

Printhead driving voltage

Option interface voltage Option interface voltage

2-11

Page 56

REV.-A

2.3.1.2 Control Circuit Section

Figure 2-9 shows the control circuit block diagram.

ILEI

I II

1111

I I I I I

I I

—

Figure 2-9. Control Circuit Block Diagram

2-12

Page 57

The control circuit consists mainly of the following ICS:

● pPD7810HG

CPU(4B)

The KPD78 10HG CPU executes the program in the 27256 PROM (4A) and controls all of the printer operations. The CPU begins executing the program from address OOOOH upon receiving the reset signal. The CPU also reads the DIP switch and jumper settings and detects the states of the analog circuits.

● 27256 PROM (4A)

The 27256 PROM includes the control program (firmware) and character generators.

●

HM6264 SRAM

HM6264 SRAMS

The

(X 2) (5A/6A)

are external memories for the CPU. They are used as an input data buffer

and line buffer for expanding data and as a working area for the program. (8K x 2 = 16K bytes)

● E05A16G gate array (7A)

E05A 16GA gate array controls handshaking for parallel data (including the optional interface),

The the control panel, plunger, speed of the carriage motor, and reset signal. The gate array also generates Italic and Super/subscript characters so that command processing speed is improved and the load on the firmware is lightened.

● E05A15HA gate array (3A)

The E05A15HA gate array has address latch and address decode functions, and controls the memory. The gate array also controls the carriage and paper feed motors using the 2-channel automatic phase switching circuit. In addition, the gate array reads the states of the head data buffer, carriage home position sensor, paper end sensor, and release switch sensor.

REV.-A

Other control circuits are as follows:

● Reset circuit

The reset circuit outputs the reset signal. The reset signal is sent to the CPU for the necessary time either when the printer power is turned on or when the I NIT signal is input from the host computer.

● Memory back-up circuit

The memory back-up circuit backs up the panel settings and data for the top-of-form

SRAM

stored in the

(6A) when the printer power is turned off, so that the values will remain valid

(TOF)

when the printer power is turned on again. The DC voltage supplied to this circuit is monitored, and power is supplied from the battery for back-up when the main-power voltage level drops.

● Plunger drive circuit

The plunger drive circuit drives the plunger using the plunger control signal. The plunger is controlled by switching the drive voltage on and off.

‘ Paper feed motor drive circuit

The paper feed motor drive circuit drives the paper feed motor using the motor control signals. The paper feed motor is a 4-phase stepper motor. The rotation of the motor (position and speed)

is controlled by outputting the phase switching signal generated by the

E05A 15HA gate array and

switching the common voltage (driving or holding).

● Carriage motor drive circuit

The carriage motor drive circuit drives the carriage motor using the carriage motor control signals. The carriage motor is a 4-phase stepper motor. The rotation of the motor (position and speed) is

controlled by outputting the phase switching signal generated by the

E05A 15HA gate array and

switching the common voltage (driving or holding).

●

Printhead

drive circuit

printhead drive circuit drives the printhead after expanding the printhead data. Data from the

The

host computer is processed and expanded so that it is converted to dot data for one vertical row. Printing is executed by expanding the patterns for vertical rows as the carriage moves.

position

2-13

Page 58

REV.-A

2.3.1.3 Memory Mapping

This printer is controlled by PEGX circuit board which equips pPD7810HG CPU with 64-K bytes of

address space. Figure 2-10 shows a memory map of this address space.

FFFF HEX.

G.A (E05A15HA)

FOOO HEX.

GA (E05A16GA)

EOOO HEX.

,:,

““

cOOOHEx

Aoo--

ST-RAM (5A)

8000 HEX.

Program

and

Character Generator

32 KB

0000 HEX.

8KB

f-’”’

Figure 2-10. Memory Mapping

2-14

Page 59

REV.-A

2.3.2 Power Supply Circuit

This section describes the operation of power supply circuit. The power supply circuit consists of following sections:

●

Filter Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.1

●

Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.2

●

Ractifier and Smoothing Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 2.3.2.3

. Chopper-Type Switching Regulator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.4

. Pulse-Width Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.5

●

+5V

Regulator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.6

●

+ 24V Regulator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.7

●

+ 12VDC Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.8

●

Vx Voltage Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2.3.2.9

2-15

Page 60

REV.-A

2.3.2.1 Filter Circuit The AC line voltage passes through the power switch, then is input to the filter circuit. A fuse, F1, is used on the in the printer from going out via the AC line. Either C 1 or coil and the case. Figure 2-1 1 shows the filter circuit.

PEBFIL-11

board. The filter circuit attenuates external noise and inhibits noise generated

drains leakage current between the primary

<.,. %

““

O&fi-C&.,

.——————

-—

(

22~/240V

2.3.2.2 Transformer

VAC,

AC Voltages(120 and 12 transformer.

VAC

and supplied to the PEGX circuit. Figure 2-12 shows a schematic drawing of the power

220

Version Only)

Figure 2-11.

VAC,

240

VAC)

LI 800}H

PEBFIL-11

that pass through the filter circuit are divided into 26

Filter Circuit Board

F 1

“)

125V

( iOOV Version

125V

1.25A 250V

(

120V

(220/240V

Version

) )

Version)

VAC

IZO vAC ~

S0/00

FRlb4ARY ORAY 7F

WHITE

IZOV

Verslan

2ECOtOARY

red

27.6 VAC

red

blue

8.3 VAC

Figure 2-12 Transformer Circuit

2-16

240

220

VAC

S0/00 HZ

FRIMARY

ORANOE

wow

BLLE

ZZO/240

E E

V Varslm

red

blw

27.6

8.3

VAC

Page 61

REV.-A

2.3.2.3 Rectifier and Smoothing Circuit

VAC

The 26 and converted to approximately 36 voltages are converted from this DC voltage, which is used as the power supply voltage for the switching regulator IC at the next stage.

AC 1

from the secondary coil of the transformer are full-wave rectified by diode bridge DB 1,

VDC by smoothing capacitor C 1. The +24 VDC and + 5

10-1

VAC

10-2

%00

50V

lo5t

VDC

‘c’~

Figure 2-13.

Rectifier and Smoothing Circuit

2-17

Page 62

REV.-A

2.3.2.4 Chopper-Type Switching Regulator Circuit A chopper-type switching regulator is employed in the power supply circuit. Operation of the step-down circuit is as follows:

–ton—

Figure 2-14. Step-Down Circuit

Figure 2-14 shows the chopper-type, step-down switching regulator circuit. When the transistor is ON,

voltage

energy WL is accumulated in choke coil L. When the transistor turns off, WL is applied to the load via flywheel diode D so that output voltage Vo becomes the average value:

Therefore, Vo can be held constant by controlling Ton. Figure 2-15 shows the step down timings.

Vi is applied to coil L and capacitor C, and load current IL flows. At this time, electromagnetic

V. =

Vi X Ton

i—-~

where, T = Ton + Toff (T is constant)

*Z=ZZZ

c-:

Vo<

Voltage between the collector

and the emitter of Tr

V1-ve o

- —

‘mitterarrentOf

cuwentdD

Current”t’okecoi’

l—

Current at

;omrEILO+

m-”

oz2rEs’::F

(

V1-vo)vo

ILO =

Figure 2-15. Step-Down Timings

2Lt

V 1

diode D when It is reverse recovered.

*’ON

(-’

“-

2-18

Page 63

REV.-A

2.3.2.5 Pulse-Width Modulation

Figure 2-16 shows the internal circuit of the

In circuit 1 the output from AMP 1 flows into the negative terminal of comparator 1, and the outputs

from AMP 2 and AMP 3 in circuit 2 flow into the negative terminal of

OR. Dead-time control voltage is also input to additional negative terminals of both

1 and 2.

A sawtooth waveform from the oscillator is input to the positive terminals. The sawtooth waveform from the oscillator causes the comparators to generate pulses as shown in Figure 2-17.

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

I I

(PWM)

Circuit

NJM2355

Circuit 1

IC. The PWM comparator operates as follows:

PWM comparator 2 without wired

PWM comparators

PWM

Comparator 1

I I I

h- ----.-----

-t

Osc

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

1%1

-1

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

----------------------------------------Figure 2-16,

PWM

Comparator 2

NJM2355

Internal Circuit

Circuit 2

2-19

Page 64

REV.-A

As shown in Figure 2-17, when the potential at the NJM2355 is

lower than the preset voltage or current k value, it is controlled by the dead-time control voltage. When it exceeds the preset value, it is controlled by the error amplifier to keep it lower than the preset value.

~..,

“

—:

----- : —.— “

@Terminol

GTerrnind

. Oead-Time

Control

Voltage

PWM

OFF

OFF ON

OFF

Comparator

output

:’

. .

Figure 2-17. Output Transistor Drive Waveform

2-20

Page 65

REV.-A

2.3.2.6 Figure 2-18 shows the +5 VDC regulator circuit An NJ

+5V

Regulator Circuit

M2355

switching regulator IC is used for constant-frequency pulse-width modulation. The circuit shown below employs an NJ as a chopper-style switching regulator circuit.

This

connected to pins 2 and 3. Therefore, R22, and

has a built-in oscillator. The oscillation frequency is determined by external components

cause the circuit to oscillate at about 30 kHz. The

oscillator waveform is shown in Figure 2-19.

:?;

C3746 013

012

A1015

(

)

NJM 2355 (7A)

M2355

Cll

1000U’

10V

lo5t

configured

—

- +5#v

: R14

3. 3K

‘:”

(

)

- c 12

R 19 33K

Figure 2-18.

VA1$

20ys/

+5V

Regulator Circuit

DI V

—

GND

Figure 2-19. Oscillator Waveform

2-21

Page 66

REV.-A

AMP 1 in the IC is an error amplifier used to monitor the output voltage. Figure 20 shows the constant-voltage control circuit. Pin 1 of the

to the negative terminal of AMP 1.

The error amplifier adjusts its output according to the voltages applied to the positive and negative

input terminals. This has the effect of maintaining the voltage at the terminal at 5V.

Figure 2-21 shows the output from AMP 1. When the voltage at pin 4 becomes higher than that at pin 5 (over voltage), AMP 1 outputs current modulated by pulse-width modulation output voltage of the circuit.

PWM is described below.

provides a 5 V reference output (Vref), which is applied

(PWM) to reduce the

OUTPUT

VREF

R20

3. 3K

Figure 2-20. Constant-Voltage

Control (+5

R 108 and C35 compensate for phase lag

Voltage

R 14

3. 3K

VDC)

v ‘r

in the error amplifier to prevent abnormal oscillation.

‘be-pin’

“

Under Voltage

( Normal

Voltage )

Figure 2-21. AMP 1 Output

Over Voltage

Pin 4

AMP 1

OUT PUT

2-22

Page 67

REV.-A

2.3.2.7 +24 Figure 2-22 shows the

VDC

Regulator Circuit

+24V

regulator circuit.

The +24VDC regulator circuit has almost the same function and employs the same oscillation circuit

as the + 5V

VDC regulator circuit.

Here, the error amplifier AMP 2 is used for over-current control, and AMP 3 for constant-voltage control.

The operation of the error amplifier AMP 3 is as follows.

1’1

Osc

VREF

14 15 16

R17

3.3K (— —

R16

1OOK(*

NJM2355

) )

(7A)

011

C3748

L1 R3

105C

4 b24VDC

?6 $. IK

!4K

-ONo

Figure 2-22.

D15

+24V

Regulator Circuit

EO;;;:GA

Poo

2-23

Page 68

REV.-A

The negative terminal of AMP 3

receives VREF (5V) Consequently, the voltage applied to the positive terminal is adjusted to 5V. Therefore, based on Figure 2-23, the output voltage is set to the following value:

(R6 + R2) =

ohms (9.1 K ohms + 2.4K ohms)

= 23.96 V

OUTPUT

Voltage

#’. %-.

3. 3K

9R7K

2R5K

Figure 2-23. Constant-Voltage Control (+24 VDC)

AMP 2 operates as follows for over-current control.

+24 V is applied to the negative terminal, and the positive terminal will receive an equal voltage when, based on Figure 2-24, a negative current of the following value flows.

o“tpu;~o’tage

R9/R3 =, ,

~~~ms

560 ohms/O.22 ohms

= 5.55 [A]

current exceeds this value, over-current protection is turned on to reduce the output voltage.

If the

OUTPUT

Voltage

$“,:.

Figure 2-24. Over-Current Protection (OCP)

Dead-time control has no bearing in this case, because pin 3 of

2-24

1 1 is grounded.

Page 69

REV.-A

2.3.2.8 +12 VDC Supply Circuit The 12 VAC from the transformer is half-wave recrified by diode D7 and is converted to +12 As shown by Figure 2-25, the half-wave rectified voltages pass through the capacitor smoothing circuit so that the ripple is small, and the average DC voltage rises when no load current flows and drops as load current increases.

VDC.

CN1 O

[“z

1000

25V

R12

3. 3K

z::

Figure 2-25. +12

VDC

12V

Circuit

1’

-y $

2-25

Page 70

REV.-A

2.3.2.9

When the and Vx

Q30

● Reset Circuit Power Supply

Vx Voltage Supply Circuit

+24V

power supply line reaches 18.6 V (18 V + 0.6 V), transistors

(+5

V) is output. On the other hand, if the +

and

Q23

turn off and the Vx voltage is shut off.

When the power is switched on or off, the circuit is reset so that it will not drive the printer until the power supply becomes stable.

24V

power

supply

line drops to 18.6 V or less,

Q30

and

Q23

{

turn on

ZD 10

RDZOJSB2

R38

R69

3. 9K

+24V

+ 5V

(

)

R71

10K

Q23

A1015

)

030

C1815Y

I-5

Figure 2-26. Vx Voltage Circuit

2-26

Page 71

REV.-A

2.3.3 Main IC Functions

This section describes the functions of the main ICS in the PEGX board control circuit.

2.3.3.1 CPU Functions

The printer employs the

pPD78 10HG CPU. The CPU processes data using a 3.685 MHz clock which

is 1/4 of the external clock (14.74 MHz.)

The CPU is reset when the reset signal (pin 28: LOW) is input, and executes the external program (4A,

PROM) from address O.

The CPU controls all of the printer operations either directly or indirectly. The external memory area

is expanded to 64K bytes so that the CPU can control the internal RAM, external ROM (4A: program and character generator), external SRAMS (5A and 6A), and the E05A16G and E05A15A gate arrays (7A and 3A).

NOTE: Refer to Section 2.3.1.3 for memory mapping.

This CPU includes an 8-bit analog-to-digital converter, timer-event counter, and serial interface. These functions can be set in units of bits using the mode register for each port, and are used with general

1/0 ports (excluding the analog-to-digital converter.)

Table 2-3 shows the port assignments. (Refer to the Appendix for details on the CPU.)

Pin No. Signal Name

6 7 8 PA7 9

16 17 18

PAO

PA5 PA6

PBO

PB7 Pco

Pcl PC2

PC3

21 PC4 22

PC5

PC6

Table 2-3. Pin Function

Direction

—

IN IN IN

OUT

IN —

Not used.

AUTO FEED XT signal/DIP switch 2-4

SLCT IN signal/Jumper J 1 DIP switch 1-1 to 1-8

TXD data output

RXD data input Not used ON-LINE switch interrupt input

Not used

P/S (Parallel/Serial) data transfer selection signal

input

OUT

PWD signal output

CPU

Function

24 25

PC7

NM 1

OUT

—

Paper feed motor driving control output Not used

2-27

Page 72

Table 2-3. Pin Function of CPU (cent’d)

Pin No.

26 27 28 29

31 32 33 34 35 36 37

Signal Name

INT1

MODE1

RESET

MODEO

x2 Oscillator terminal. FX-850/1050 : 14.74 MHz

Direction

— —

IN —

—

Not used External mode setting terminal External reset signal External mode setting terminal

Function

Vss

ANO

AN 1

AN2 AN3

AN5 AN6 AN7

— —

IN IN IN IN

—

Ground Analog port ground Vp (+ 24VDC) monitor port Vu (+ 36VDC) monitor port

Printhead short-circuit monitor port DIP switch 2-1 to 2-3

Not used

42 43 AV 44 45 WR 46

VAref

ALE

—

OUT OUT OUT

Analog reference voltage input : 4.7V Analog port power source

Read strobe signal output Write strobe signal output Address Latch Enable signal output

(Low address : AO -A8)

54 55

62 63

64 Vcc

PFO

PF7

PDO

PD7 VDD

OUT

IN/OUT

—

High address data (A8 -Al 5)

8 bit address/data bus

Internal memory power source

Main power sourse

NOTE: “Direction” on the signal flow is as viewed from the CPU.

2-28

Page 73

REV.-A

2.3.3.2 E05A15HA Gate Array Functions

This gate array performs chip selection for the main components on the PEGX board, under the control

of the 78 10HG CPU. The gate array also outputs the lower address signals (AO through A7) for the ROM and RAM using data from the CPU. In addition, the gate array controls the carriage motor and paper

feed motor, and drives the printhead and plunger solenoids.

Table 2-4 shows the pin assignments for the gate array. Refer to the Appendix for the details on the

gate array.

Table 2-4. Pin Function of GA (E05A15HA)

Pin No. Signal Name

BANK O BANK 1 OUT

CS4

CS3

CS2 OUT

Cs 1

Direction

OUT

Function

Not used

Chip select signal for the gate array (7A): Low active signal

Chip select signal for the ST-RAM (6A): Low active signal

Chip select signal for the ST-RAM (5A): Low active signal

Chip select signal for the P-RAM (4A): Low active signal

Not used

Home Position (HP) signal input

Paper End

(PE)

signal input

12 CRA

13 14 15

I I

24 25

CRB

CRC

CRD

HD 1

HD8

Vss Vss

OUT OUT OUT OUT

OUT

—

Friction/Tractor switch status input

Friction mode: High

Tractor mode: Low

Not

used

Carriage motor driving signal

Printed driving signal

(Head Data 1-8)

Logic Ground

Page 74

REV.-A

Table 2-4. Pin Function of GA (E05A15HA) (cent’d)

. .

Pin No. Signal Name

26 27

28 29 30

31 32 33 34 35 36 37 38 HD9 39

40 Al 3 41 42 Al 5

43 44 Al 45

PWD

PFA

PFB PFC PFD

CTRGO

VDD

Al 4R

Al 4

Diraction

I I

OUT OUT

— —

OUT

IN OUT OUT OUT

IN OUT

OUT OUT

Function

Printhead

Paper feed motor driving signal

Not used

+5V

Plunger solenoid driving signal

Write strobe signal

Read strobe signal Address bit Al 3 for the P-ROM (4A) Address bit Al 4 for the P-ROM (4A)

Printhead

driving signal

driving signal (Head Data 9)

Address bit Al 2-Al 5 (input)

Address bit AO-A2 (output)

., .

..”

NOTE:

46 47 48 49 50 51

I I

55 56

I I

63 64

“Direction””

CTRG–

CTRG+

on the signal flow is as viewed from the gate array.

Vss

ALE

A7 DO

Vrm

IN OUT

OUT

1/0 Input/Output data bus: DO - D7

Not

used

Reset signal input

Logic Ground

Address Latch Enable Not used Address bit A3-A7 (output)

1/0

—

+5V

~=.,.

2-30

Page 75

REV.-A

2.3.3.3 E05A16GA Gate Array Functions

The E05A16GA gate array is selected by the CS signal (pin 37: decoded by the higher address in the

E05A 15HA) from the E05A15HA gate array (3A), and the internal function of this gate array is activated

when the CPU reads or writes data at the memory mapped address

,(lower

address: AO through A3).

Table 2-5 shows the pin assignments for this gate array. Refer to the Appendix for the detailed specifications on this gate array.

Table

2-5. Pin Function of GA

(E05A16GA)

Pin No. Signal Name

4 5 6 7 8 9

14 15 17

18 19 RSTOUT

20 21 ACK

RXDIN

RSTIN

Vss

RSTIN2

IN7

IN2

STRB

IN 1

INO

BUSY

Direction

IN/OUT

IN IN

— IN

IN IN

OUT

Function

Data bus bit 4-7

Not used Initialize signal (IN IT) input: Low active signal Logic ground Power-on reset signal Parallel data (D7-D2)

Strobe signal

Parallel data

Reset signal output which the

signal is input. BUSY signal Acknowledge signal

(D1-DO)

RSTIN1

or RSTIN2

22 23 24 25 26 27 28 29

32 33 34 35

PE ERR

PC3 PC2

Pc 1

Pco

RXDOUT

PD 1 PDO

PAO

VDD

PA1 PA2

Vss

OUT OUT OUT OUT OUT OUT OUT OUT Carriage motor Power-down signal OUT

IN IN IN IN

—

Paper End signal ERROR signal Carriage motor control signal Buzzer control signal Plunger solenoid ON/OFF control signal Carriage motor control signal RXD Signal output

+ 24V DC control signal FONT switch (control panel) status monitor Power source PITCH switch (control panel) status monitor

CONDENSED switch (control panel) status monitor

Logic ground

Page 76

REV.-A

Table 2-5. Pin Function of GA (E05A16GA) (cent’d)

Pin No.

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 PA5 52

Signal Name

PC4 PC5 PC6

PC7 PBO

PB 1

PB2

PB3

PB4 PB5 PB6 PB7

Vss PA3 PA4

PA6 PA7

Direction

OUT OUT OUT

—

OUT OUT OUT OUT OUT OUT OUT

— —

—

Function PAPER OUT LED ON/OFF Control Signal READY LED ON\ OFF control signal ON LINE LED ON/OFF control signal Not used DRAFT LED ON/OFF control signal ROMAN LED ON/OFF control signal SANS SERIF LED ON/OFF control signal

CPI

(PICA) LED ON/OFF control signal

CPI

(ELITE) LED ON/OFF control signal

PS (PROPORTIONAL) LED ON/OFF control signal

CONDENSED LED ON/OFF control signal

Not used Logic ground LINE FEED switch FORM FEED switch LOAD/EJECT switch Not used

56 57 Cs 58 59 WR 55

63 64

AO IN

DBO

DB3 Vrm

lN\OUT

Address bit (AO - A2)

Chip Select signal input

Read strobe signal

Write strobe signal Input/Output data bus (DO - D3)

Power source

NOTE: “Direction” on the signal flow is as viewed from the gate array.

2-32

Page 77

REV.-A

2.3.4 Main Circuit Operation

All the printer operations are controlled by the PEGX board. The printer control can be divided into two sections: the main control for the host computer interface, printer initialization, memory control, analog signal detection, and reading the DIP switch settings, and error detection and mechanism control for driving the printer mechanisms such as the carriage motor, paper feed motor, plunger, and printhead. This section describes the operation of the following:

● Reset Circuit

● Interface Control Circuit

● Memory Back-up Circuit

● Error-Detection

2.3.4.1 Reset Circuit The printer is reset when any of the following occur:

● The printer power is turned on (hardware initialization).

● The initialization signal (INIT) is received from the host computer (hardware initialization).

● Control code

The reset operation performed for the Figure 2-27 shows the reset circuit.

ESC @

is received from the host computer (software initialization).

ESC @

code is different from that for the other two cases.

d.,,

R80

1“

Refer to Section 1.7 for

y!:

2. 2N

+’”’”’”

Figure 2-27. Reset Circuit

information on hardware and software initialization.

R99

ST-RAM (6A)

‘

CS2

2-33

Page 78

REV.-A

2.3.4.2 Interface Control Circuit Parallel data communication between the printer and host computer is controlled by the gate array

(IC7A:

E05A 16GA) on the PEGX board. Figure 2-28 shows the interface control circuit block diagram.

Figure 2-29 shows the parallel interface data transmission timing.

,y +

HOST COMPUTER

E05A

16 GA)

(7A)

DATA BUS ‘

IN7

INO

STROBE

BUSY

AUTO FEED XT

Figure 2-28. Interface Control Circuit Block Diagram

(78 10HG)

PD7

PDO

PA6

PA7

CPU

(4B)

2-34

,. .

$“

Page 79

BUSY

ACKNLG

DATA

REV.-A

STROBE

.-.

Figure 2-29. Data Transmission Timing

Sequence

1. Data transmitted from the STROBE signal. The gate array

host computer is latched into the gate array at the trailing edge of the

(IC7A)

then outputs the BUSY signal to the host computer.

2. The CPU reads the data latched in the gate array and clears the BUSY signal. However, the CPU also outputs a

sbftware generated BUSY signal to the host computer via the gate array

(IC7A)

so that the

BUSY signal to the host computer remains HIGH.

3. The CPU stores the data from the gate array

in the input buffer

(IC5A)

and informs the gate

(IC7A)

array of completion of data processing through the data bus. The gate array outputs the ACK signal to the host computer to indicate that 1 byte of data has been processed. The CPU then clears the BUSY signal.

4. The printer is now ready to accept the next data byte.

2-35

Page 80

REV.-A

Serial Interface Control Circuit Serial data communication between the printer and host computer is controlled by the serial interface board (#8 143). Other buffered serial interface boards are available.

Figure 2-30 shows

the serial data flow.

y.- ~

‘:’

8143

CPU

(78 10HG)

(4B)

RXD

HOST

-F+F

BUSY/RDY

DTR

COMPUTEF

TXD

Figure 2-30.

Sequence

1. Serial data from the host computer is input to terminal IN7 of the gate array via the optional interface

(8 143) using a start-stop system. The serial data is input in order of the start bit, data (7 or 8 bits), and stop bits. While a byte of data is being processed, the printer is kept in the BUSY state.

2. The data input into the gate array is serially transferred from the RXOUT terminal to the of the printer.

3. The byte of serial data input to the CPU is converted from serial to parallel in the CPU and stored in the input buffer. The BUSY state is cleared.

4. The printer is ready to accept the next data byte.

d?%

BUSY

TXD

Serial Data Flow

RXD(PC 1

PD7

PDO

TXD(PCO)

RXD

)

terminal

$:-.,

;“

2-36

Page 81

REV.-A

2.3.4.3 DIP Switch Circuit

The printer has two types of

PBO

CPU

(781OHG)

(46)

AN3

and Jumpers DIP switches and two jumpers. Figure 2-31 shows the DIP switch circuit.

+5V

RM 1

-14AUTO

FEtD

PA? PA6

R65

R1OO

SW2-4

Vbv”r

Figure 2-31. DIP Switch Circuit

DIP switch settings are read by the DIP switch circuit whenever the printer power is turned on and whenever the INIT signal is sent to the printer from the host computer.

Jumpers There are two jumpers on the PEGX board. J 1: Determines whether or not the internally fixed printer selection signal

(SLCTIN)

is selected by the

host computer.

When jumper J 1 is connected, the

J2: Switches the memory capacity (5

SLCTIN

12K

signal is internally fixed (always selected).

bits or 256K bits) for the PROM

(IC4A).

2-37

Page 82

REV.-A

2.3.4.4 Memory Back-up Circuit

The printer is equipped with SRAM

(IC6A)

that stores the printing mode, character pitch, and TOF (top “

of form) position set using the control panel. The memory back-up circuit is on the PEGX board so that

the settings can be maintained even when the printer power is turned off. A lithium battery is used to

back up the memory. Figure 2-32 shows the memory back-up circuit.

024

R78

A1015

)77

“

ST-RAM

:2:

HM6264 (6A)

17335

+5V

ZD8

HZS3 . ONBZ

R77

150

R79

150

Figure 2-32. Memory Back-up Circuit

.-,

.“

+5V

When the power is turned on under normal conditions,

is applied to Vcc of the RAM and the CPU

starts reading and writing. When the power is turned off, and the voltage on the + 5V line decreases

3.OV,

to about

battery is applied to the

lists the static RAM conditions when the power is on or off.

transistors Q24 and Q25 are switched off and the voltage from the external lithium

Vcc

terminal. The data in the static RAM is therefore maintained. Table 2-6

Table 2-6. ST-RAM Conditions

Power

OFF

+5V

Line

CS2

Vcc [v]

+3.0

-3.3 Data holding

ST-RAM mode

Normal

f“:

2-38

Page 83

REV.-A

2.3.4.5 Printer Error Detection The printer has a function that detects various errors and informs the user of the type of error using

buzzer sound patterns. If an error occurs, the printer is set OFF LINE and the drive voltage is cut off so that damage to the circuits can be minimized. Types of errors, descriptions, and printer states are as follows:

● Carriage Errors:

The buzzer beeps 6 times, pausing briefly after third beep.

Error status:

● The home position sensor indicates home position when the carriage cannot be at the home

position.

● The home position sensor does not indicate home position when the carriage must be at the home

position.

● Printing has not been completed when the carriage is in the deceleration mode.

● After a home position seek is executed, the carriage does not return to the home position.

● Printing is not completed after the carriage reaches the home position.

● Abnormal Voltage

The buzzer beeps 5 times with a pause after every beep.

● An abnormal voltage has been detected on the 24 VDC line. The +24 V (VP) is monitored at ANO

of the CPU. If the voltage (+25 V) is + 28.4 V or more or 19.6 V or less, the printer enters an error state.

● Shorted Printhead Drive Transistor

The buzzer beeps 10 times with a pause after every beep.

● When the printer power is turned on, the drive transistor is checked for shorts during the printer

initialization sequence.

● During printing, the

printhead

drive circuit is checked for shorts each time printing of one frame

is completed.

The state of the

printhead

drive transistor is monitored at AN 1 (pin 35) of the CPU.

● RAM error

The buzzer beeps 6 to 10 times, pausing briefly after every 2 beeps. The beeps warns which RAM is incorrect as follows: Beeps 6 times: internal CPU Beeps 8 times: ST-RAM (5A) Beeps 10 times: ST-RAM (6A)

There are three RAMs on the PEGX board, a 256-byte RAM in the CPU and static RAMs

IC6A. When the printer power is turned on, read/write tests of the RAM in the CPU and

are performed, and a check sum of the

IC6A back-up

When any of the above four errors (carriage error,

SRAM

is calculated and checked.

abnormal voltage, shorted

IC5A and

SRAM

printhead

IC5A

drive transistor, or RAM error) is detected, the printer is set OFF LINE, and the following process is performed:

Prohibit interrupt

● Initialize 1/0 port

. Initialize

printhead

data . Drop + 24VDC and + 36VDC . BUSY signal goes high.

● ERR signal goes low.

● Buzzer beeps.

2-39

Page 84

REV.-A

● Paper End Error

The buzzer beeps 20 times with a pause after every four beeps.

● No paper was loaded when the printer power was turned on.

“

The paper-out state was detected during printing (paper feeding).

When the paper-out state is detected, the printer is set OFF LINE, and the following process is

performed:

● PE signal goes high.

● PE LED lights

● Buzzer beeps.

f’”

- .,

3.-

2-40

*-”:

Page 85

REV.-A

2.3.5 Printer Mechanism Control

This section describes following operating principles: . Carriage Control Circuit and Software Control

● Paper Feed Control Circuit and Software Control

● Print Control Circuit

2.3.5.1 Carriage Control Circuit

The carriage mechanism of the printer is driven by the carriage motor. Reversing the motor rotation,

holding, and phase switching for the carriage motor are controlled by the 4-phase stepper motor drive

IC (IC2A:

by the CPU. The rotational speed of the carriage motor is controlled by another gate array E05A16GA). This gate array motor drive voltage Vu when a hardware error is detected. Figure 2-33 shows the block diagram of

the carriage motor control circuit.

STK6722HZ). This IC

(IC2A)

is controlled by a gate array

(IC7A)

also outputs the power-down signal (PD 1 ) that shuts off carriage

(IC3A:

E05A15HA) which is controlled

(IC3A:

(E?5A 15H$)

CPU

(4B)

P?7

PDO

CRC

CRD

(3A)

PD1

Pco PC3

(7A)

(E05A 16GA)

Figure 2-33. Carriage Motor Control Block Diagram

2-41

Page 86

REV.-A

Carriage Motor Specifications Type Voltage

Coil Resistance

Current

Excitation

Gate Array (IC3A: E05A15HA)

(IC3A)

This gate array stepper motor drive and timing vary depending on the speed and the mode (forward or reverse) of the carriage. The mode register in the gate array switching method, and is fed by the CPU. The gate array

(PDO

PD3)

from the CPU in the carriage motor phase-switching circuit in accordance with the direction and method determined by the mode register, and outputs the data to the 4-phase stepper motor drive

IC (IC2A).

outputs the phase-switching signals

IC (IC2A:

Figure 2-34 shows the block diagram of the gate array

4-phase 200-pole stepper motor Driving: Holding:

110 Driving: 0.68A (max.) Hoding: O. 15A (typical)

1-2 phase, 2-2 phase

STK6722HZ), under the control of the CPU. Phase-switching cycles

+36DC

+5V

7Y0

at 25°C per phase

(IC3A)

determines the carriage movement direction and phase

(CRA, CRB,

(IC3A)

CRC, and

expands the phase data

CRD)

to the 4-phase

(IC3A)

operation.

“c

.-,

CPU

i4B-)

PD3 PDO

Rf5

(E05A 15HA)

(3A)

DB3-O

ViR

Carriage Motor

Phose

Switching Circuit

-m

Latch

—

Figure 2-34. GA (E05A15HA) Operation Diagram

CI?A CRB

CRC

CRD

STK6722

(2A)

f“”

.. .

2-42

Page 87

Gate Array (IC7A: E05A16GA)

(IC7A)

This gate array

motor drive by combining the reference voltage for the 4-phase stepper motor drive

Figure 2-35 shows the block diagram of the gate array

IC (IC2A:

outputs the carriage speed control signal

STK6722HZ), under the control of the CPU. The carriage speed is controlled

(IC7A)

(PCO

operation.

and

PC3)

to the 4-phase stepper

IC (IC2A)

with

PCO

REV.-A

and

PC3.

CPU

7810HG

(4B)

PD7

PDO

GA(E05A 15HA)

(3A)

DB7

DBO

Pco

R97

3.OIK

+5V

STK6722

(2A)

VCC2

Vref

PD 1

Figure 2-35.

This gate array also performs another function. When a hardware error (except a paper end) is detected in the printer, the gate array outputs the power down signal (PD 1 ) to the 4-phase stepper

(IC2A)

motor drive IC

and shuts off the +36 VDC, so that damage to the circuit can be minimized.

GA (E05A16GA) Operation Diagram

2-43

Page 88

REV.-A

● 4-phase Stepper Motor Drive

(IC2A: STK6722HZ) The 4-phase stepper motor drive IC directly drives the carriage motor, under control of the gate arrays

(IC3A:

E05A15HA and

IC7A:

E05A16GA). Figure 2-36 shows the carriage motor drive circuit block

diagram.

GA(E05A15HA)

(3A)

GA(E05A

(7A)

CRA

CRB

CRC

CRD

16GA)

PD 1

Pco

Figure 2-36. Carriage Motor Drive Circuit Block Diagram

STK6722

(2A)

IB Ic

Vref

CCD

CAB

. .,

2-44

Page 89

REV.-A

Carriage Motor Excitation System The carriage motor is controlled by the carriage motor constant current drive circuit. The phases of

CRA

CRD

the carriage motor are controlled by

2-2 phase and 1-2 phase excitation, are used. Because the carriage motor has one driving transistor

per winding

two drivers become active alternately in the 1-2 phase excitation system. Figure 2-37 shows the carriage

motor drive sequences.

(unipolar drive), two drivers become active in the 2-2 phase excitation system and one and

“c

OFF

OD “N 1.

OFF

s+-

123

of the gate array

415 6 7 8

1 I

(IC3A:

E05A 15GA). Two drive systems,

Rotat ion

(ICIA )

c)’

“c

“D ‘

step

Rotat

Ion

OFF

“FF

OFF

C.c.

(a) 2-2 Phase Excitation

:: -

’

C.w

(Carriage moves left to right.

1234567

C.c.

(b) 1-2 Phase Excitation

C.w

(Carriage moves left to right. )

811

Figure 2-37. Carriage Motor Drive Sequence

2-45

Page 90

REV.-A

● Drive

When driving the carriage, direction. The table below

f:,:

1,,. .

the phase excitation sequence differs depending the carriage speed and

shows the phase excitation sequences.

Table 2-7. 2-2 phase Excitation

Drive

Sequence

Step No.

2 3 4

Drive Sequence

Step No.

1 2 3 4 5

]

Phase A

ON ON ON

ON ON ON’

I I I

Left to Right

Phase B Phase C Phase D

ON ON ON ON ON ON ON ON

Table 2-8. 1-2 phase Excitation

Left to Right

Phase A

Phase B Phase C Phase D

ON ON ON ON ON

ON ON ON

Phase A Phase B

Phase A

ON ON

Phase B

Right to Left

Phase C Phase D

Right to Left

Phase C Phase D

f -

i–

“ON

6 7 8

ON ON ON ON

2-46

Page 91

REV.-A

General Operation

Figure 2-38 shows the block diagram of and D, and each coil is driven by the corresponding phase driver A to D. These phase drivers are switched directory by the output pulses from ports

phase drivers are turned off, the surge voltage (e = – L X

motor is applied to the surge voltage absorber via the flywheel diode attached to each phase driver, and is absorbed. This circuit drives the carriage motor using a constant current chopper type drive system. Most of this circuit is included in the 4 phase stepper motor driver

performed using a separately-excited system (oscillation frequency: approximately 24 KHz). The carriage

motor supply voltages VCAB and

VCCD

IC2A (STK6722). The carriage motor has four coils A, B, C,

CRA

CRD

of the gate array

diidt) generated from the coils of the carriage

IC (IC2A:

are applied intermittently so that the coil current is kept constant.

STK6722HA). Chopper control is

(IC3A:

E05A15HA). When the

+35VDC

—-

Surge

Absorber

Voltoge

‘3

—

—-

)

Phase A Driver

From

A04

E05A15HA

Col

Phose

Driver

From

E05A15HA

B04

Phase C Phase D Driver

Driver

Vcco

.—

------%-LET’

Figure 2-38. Carriage Motor Drive Circuit Block Diagram

Polof

E05A16GA

2-47

Vref

From Reference Voltage

Generotlon Circuit

(

+5V

)

Page 92

REV.-A

Detailed Operation (Figure 2-39.)

●

When the + 5V supply voltage is applied to the STK6722HZ

the H-IC starts oscillation and outputs the reference signal (approx. 24KHz) for chopper control.

Because the output of comparator

●

side) when the printer power is turned on, signal (AO 1: low) is input to the base of TR3,

TR 1 to phase A to D5 to

VR13

Voltage

pin 8 (from the reference voltage generation circuit), the output of off, and TR 1 turns off. Then

IC2

goes high again.

●

The surge voltage (also called

(approx.

protect

When the carriage motor stops, the motor drive pulses are fixed at a set value to hold the carriage

●

motor. At this time,

operation is performed (when the carriage motor is held), PD 1 of the E05A 16GA and TR 11 turns on to drop the reference voltage at the plus side of IC2. As a result, the load on

is reduced and by PWM control.

across limiter resistance R13 increases. When

47V) between the collector and base of transistor Q5, and is absorbed by transistor Q5 to

TR3

from being damaged.

H-IC

TR3

H-IC

is powered down to prevent it from overheating. When the power down

is effectively powered down, At this time, approximately 5V is supplied to

IC2 (point Q) is high (input at the plus side > input at the minus

TR7

turns on and base current flows to TR 1. When a high

TR3 turns on, and coil current

to R 13.

ICA

starts decreasing. When

flyback voltage) generated when

ICA

gradually increases due to the reactance of the motor coil.

(IC2A),

VR13

becomes less than

TR3

the triangular waveform circuit “’”

becomes the same as the

IC2

(point Q) goes low, TR7 turns

is cut off by the zener diode ZD 1

ICA

flows from

VREF,

the output of

(IC7A)

goes low, ‘“

VCOMAB VCOMAB

VCCI

VREF

g,:, *

;

---

cot

-8

1“

Wld’A

‘“’I

‘w+

Ott

‘7:F

—

.. -,,.

Figure 2-39. Carriage Motor Control Circuit

2-48

Page 93

2.3.5.2 Carriage Motor Software Control This section describes the carriage motor software control.

Software Control System

(NLQ:

The carriage motor speed is controlled by the printer firmware. Various types of characters

Near

Letter Quality, Draft, and condensed) can be printed by controlling the print and paper feed mechanisms

lnd

the carriage motor speed. The printer has the six speed modes shown in Table 2-9.

Table 2-9. Carriage Speed Modes

Speed Mode

Cerriage Speed I Excitation System

pps

3 4

5 6

3840

2640

2134

1280

1067

640

Note: The carriage speeds and number of

Phase

High

2-2

1-2

1-2 1-2

PPS

ESC*5

(pulse per second) for the 1-2 phase excitation system

speed skipping

Draft

ESC

ESC*6, Draft half, emphasis, ESC

ESC

Z, ESC”4

ESC*7

emphasis-condensed NLQ-Condensed Double height

Description

NLQ

are transformed into these for the 2-2 phase excitation system.

● Speed Control

Since a stepper motor is used as the carriage motor, holding

any position and reversing the printing

direction are possible. The carriage motor control uses an open-loop system, and the carriage position

is synchronized with the phase switching by the firmware. Acceleration, constant speed, and

deceleration control is performed as described below.

Acceleration control: The carriage motor is accelerated in accordance with the acceleration time table. The acceleration time varies depending on the speed mode. Table 2-10 shows the differences between the speed modes.

Table 2-10. Acceleration/Deceleration Control

Speed Mode Carriage Speed

pps

2 3 4

5 6

3840 2640 2134

1280 1067

640

Phase Excitation

2-2 2-2 2-2

1-2 1-2 1-2

2-49

Acceleration/

Deceleration

24 24 48 48 48

steps

Constant Speed

ins/step

0.286

0.379

0.469

0.391

0.469

0.781

Page 94

REV.-A

Constant Speed Control:

The carriage motor constant speed depends on the constant speed set time, which varies with the

carriage speed mode. Printing is possible when the carriage moves at a constant speed. Table 2-10

shows the set times for constant carriage speed.

Deceleration Control: The carriage motor is decelerated in accordance with the deceleration time table. The deceleration time varies depending on the speed mode. The number of deceleration steps for each speed mode are the same as the acceleration steps at the corresponding speed mode. Refer to Table 2-10.

High Speed Skip:

PPS.

High speed skip causes the carriage to skip over blank areas at the high speed of 3840 area continues for nine characters (normal characters) or more after a print command (CR or LF command) is received, the carriage is controlled to skip the area at the high speed of 3840 the carriage comes to the end of the blank area, the carriage speed is lowered so that printing can be started at the speed corresponding to the specified printing mode. Figure 2-40 shows the high speed skip operation.

If a blank

PPS.

de:’,,

.-,

-.. ,

Carriage Speed

3840PPs

acceleration

Stap

pasltlan

Figure 2-40. High Speed Skip Operation

Carriage Movement

I 1’

[’L

&c*lorailm

I I I

Printable Area

640pps

Chmacter/DIV

2-50

Page 95

REV.-A

Home Position Seek Operation

The function which moves the carriage to the home position after CPU inputs RESET signal is called

home position seek. This is operated by driving the carriage motor. Figure 2-41 shows the operation

flow and Figure 2-42 shows the phase state of home

position seek.

Set 2-2 phase excitation with 2134 PPS

[

motor.

Hold the CR motor until

20-30 ms.

the CR

I 0. 68A

Decelerate the carriage

until it stops.

Move the carriage from

right to left 4 steps.

Confirm the phase

excitation state

CR motor.

Set the phase excitation

state to firmware flag.

of the

Figure 2-41. Home Position Seek Operaiton

2-51

Page 96

REV.-A

HP Signal

CR Motor

out

(

Phase A

(

Phase B

Phase C

[

I I

Figure 2-42. Home

I I

Detects HP Signal

4il

I I

2 I 3 --

Reads

and sets the

Seek Phase States

phase change

Point

the

CPU.

. . .

i“

. ---

2-52

Page 97

REV.-A

2.3.5.3 Paper Feed Control Circuit The paper feed mechanism of this printer is driven by the paper feed motor. The paper feed motor is

(IC3A:

controlled by a gate array drive circuit block diagram.

E05A1 5HA) and the CPU. Figure 2-43 shows the paper feed motor

vu +5V

COMCD

(4B)

‘c’

GA(E05A

ISHA)

COMAB

?’

(3A)

ffB

-i

Pfc

ffD

Figure 2-43. Paper Feed Motor Drive Circuit Block Diagram

As you can see in

and phase switching is performed by the gate array (I and reverse directions. Since the paper feed motor rotates in the reverse direction only for micro adjustment or sheet load/eject, the paper feed motor cannot be rotated in the reverse direction by any control codes.

Figure 2-43, the paper feed motor drive voltage is controlled by PC7 from the CPU,

C3A).

The paper feed motor rotates in both forward

● Paper Feed Motor Specifications Type Voltage

Coil Resistance Current

Excitation Paper Feed Pitch

4-phase 48-pole PM type stepper motor Driving: Holding: +5 VDC

78Q &

Driving: 1.2 A (max.) Holding: 0.08 2-2 phase

0.118 mm/pulse (4.23 mm: 1/6”: 36 pulse)

+36

VDC

3fl

at 25” per phase

A(typical)

2-53

Page 98

REV.-A

● Gate Array (IC3A: E05A15HA)

(IC3A)

This gate array

rotational direction, under control of the CPU. Data for expanded in the paper feed motor phase switching circuit,

to switch the rotational direction of the paper feed motor.

directly controls phase switching

for the paper feed motor to switch the phase switching is sent from the CPU, and output as the phase switching signal

CPU

GA[E05A15HA)

(4B)

PD3

PDO

Figure

Paper Feed Motor Excitation System The paper feed motor is controlled by the open-loop constant voltage drive circuit. The phases of the paper feed motor are controlled by

2-2 Phase excitation system is used. The paper feed motor has one driving transistor per winding active in the 2-2 phase excitation system.

Figure 2-45 shows the 2-2 phase excitation system.

2-44. GA (E05A15HA) Function for Paper Feed Motor

( 3A)

PFA-PFD

Paper Feed Motor Phase Switching Circuit

Latch

of the gate array

(unipolar drive), two driver’s become

Mode Reg.

(IC3A:

—

E05A15HA).

(

IC2A)

A02 ‘

OFF

C02

B02

002 ‘

Rotation

Figure 2-45.

‘

Step

OFF

1234

C.c. w

Phase Excitation System

2-54

I 1

C.w

,:.

”-’

Page 99

REV.-A

Drive Sequence When driving the paper feed motor, the phase excitation sequence differs depending the paper feed direction. The table below shows the phase excitation sequence.

Table 2-11. 2-2 phase Excitation

Drive sequence

Step No.

1 2 ON 3 4

Phase A

Foward Feed

Phase B

ON ON

Phase C

Phase D

ON ON ON

Phase

Reverse Feed

Phase B

ON ON ON

Phase C

Phase D

NOTE: If the paper feed motor is driven counterclockwise, paper is fed in reverse.

2.3.5.3 Paper Feed Motor Software Control

This section describes the paper feed motor software control.

Software Control System

The speed and rotational direction of the paper feed motor are controlled by the printer firmware. Line

spacing is also controlled by the firmware. The minimum line spacing value that the user can set is

1/2 16 inch. The printer supports the following three speed modes for paper feeding.

Table 2-12. Paper Feed Motor Speed

Speed Mode

Feed Speed

660 pps 2-2

720

Pp!ii

780 PPS

Excitation System

Phase

2-2 Phase

Description

Continuous paper feed Cut sheet intermittent feed

Cut sheet continuous feed

The paper feed direction is operated by following operation shown in Table 2-13.

Table 2-13. Paper Feed Direction and Operation

Feed Direction

Description

. Control Panel Operation (FF or LF switch)

Forward

● Print Operation

● Paper Load Operation

● Micro Adjustment Operation

● Paper Back-out Operation

Reverse

● Paper Load Operation

● Micro Adjustment ODeration

2-55

Page 100

REV.-A

● Speed Control

Since a stepper motor is used for the paper feed motor, holding at any position is possible. Acceleration, constant speed, and deceleration of the paper feed motor are performed by the

firmware, just like the carriage motor. The speed control methods are described below.

Acceleration Control: The paper feed motor is accelerated in accordance with the acceleration time table. The acceleration time varies depending on the speed mode. Table 2-14 shows the differences between the speed modes.

Table 2-14. Acceleration/Deceleration Mode

f::

Speed

Mode

121

Constant speed control: The paper feed motor constant speed depends on the constant speed set time, which varies depending on the speed mode. Table 2-14 shows the set times for constant paper feed motor speed.

Deceleration control: The paper feed motor is decelerated in accordance with the deceleration time table. The deceleration time varies depending on the speed mode. The number of deceleration steps for each speed mode are the same as the acceleration steps at the corresponding speed mode. When the paper feed motor

decelerates and stops, the drive voltage (+36 V) is turned on and off (chopping) so that the motor stops

stably. When the paper feed motor stops, the motor drive control is performed during the drive voltage chopping operation so that any backlash in the gears of the paper feed mechanism can be taken up.

Paper feed control in the When the the phase excitation system for the paper feed motor changes from the 2-2 phase excitation system. “ The paper feed motor is driven once using the 2-2 phase excitation system, then once using the 1-2

phase excitation system. Therefore, when the

feed motor is held by the 1-2 phase excitation system.

NLQ

Feed Speed

660 pps 720 PPS 780

NLQ mode

(Near Letter Quality) printing operation shifts from the first pass to the second pass,

Excitation System

I I

2-2 Phase

NLQ

printing operation is on the second pass, the paper

Acceleration/

Deceleration

7/6

Steps

7/6

Steps

7/6 Steps

Constant Speed

1.52

1.39

1.28

mS mS

~- -,

‘.

2-56

Epson FX-850, FX-1050 Service Manual

PREFACE

REVISION TABLE

PRECAUTIONS

TABLE OF CONTENTS

GENERAL DESCRIPTION

1.2 SPECIFICATIONS

OPERATING PRINCIPLES