Epson FX-880 Service Manual

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EPSON FX-880

4008484

NOTICE

transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.



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



All effort have been made to ensure the accuracy of the contents of this manual. However,

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



The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for

any errors in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION. General Notice: Other product names used herein are for identification purpose only and may

be trademarks or registered trademarks of their respective owners. EPSON disclaims any and all rights in those marks.

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.

DANGER

WARNING

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

Signals a precaution which, if ignored, could r esult in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings.

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

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM THE POW ER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURES.

2. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIER WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

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

WARNING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON T HE SERIAL NUMBER/RATING PLATE. I F THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAI LABLE POW ER 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 MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

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

PREFACE

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of FX880. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 1. PRODUCT DESCRIPTIONS

Provides a general overview and specifications of the product.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of electrical and mechanical operations of the product.

CHAPTER 3. TROUBLESHOOTING

Provides the step-by-step procedures for troubleshooting.

CHAPTER 4. DISASSEMBLY AND ASSEMBLY

Describes the step-by-step procedures for disassembling and assembling the product.

CHAPTER 5. ADJUSTMENTS

Provides Epson-approved methods for adjustment.

CHAPTER 6. MAINTENANCE

Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.

APPENDIX

Provides the following additional information for reference:

• Connector pin assignments

• Electric circuit boards components layout

• Exploded diagram

• Electrical circuit boards schematics

REVISION STATUS

Rev. Date Page(s) Contents

A 1997/09/30 All First release

TABLE OF CONTENTS

PRODUCT SPECIFICATION

1.1 SPECIFICATION .................................................................................. 1-1

1.2 OPERATION.........................................................................................1-7

1.2.1 Control panel ................................................................................................ 1-7

1.2.2 Switches........................................................................................................ 1-7

1.2.2.1 Usual Operation..................................................................................1-7

1.2.2.2 Operations at Power-on...................................................................... 1-8

1.2.3 Indicators ( LEDs )........................................................................................ 1-9

1.2.4 Buzzer............................................................................................................ 1-9

1.2.5 Default setting mode 1............................................................................... 1-10

1.2.5.1 Setting Method.................................................................................. 1-10

1.2.5.2 Setting Items.....................................................................................1-10

1.2.6 Default Setting Mode 2............................................................................... 1-11

1.2.6.1 Setting Items..................................................................................... 1-11

1.2.7 EEPROM Clear Function............................................................................ 1-12

1.2.8 Bi-D Adjustment.......................................................................................... 1-13

OPERATING PRICIPLES

2.1 MAIN COMPONENTS..........................................................................2-1

2.1.1 C229MAIN Board........................................................................................... 2-1

2.1.2 C229PSB/PSE Board.................................................................................... 2-1

2.2 PRINTER MECHANISM.......................................................................2-2

2.2.1 Printhead....................................................................................................... 2-2

2.2.2 Paper Feed Mechanism................................................................................ 2-2

2.2.3 Carriage Movement Mechanism.................................................................. 2-2

2.2.4 Tractor Feed Mechanism ............................................................................. 2-2

2.2.5 Platen Gap Adjustment Mechanism............................................................ 2-2

2.2.6 Ribbon Feed Mechanism ............................................................................. 2-2

2.3 CIRCUIT OPERATION......................................................................... 2-4

2.3.1 C229PSB/PSE Power Supply Circuit .......................................................... 2-4

2.3.2 C229MAIN Board Circuit .............................................................................. 2-5

TROUBLESHOOTING

3.1 OVERVIEW ..........................................................................................3-1

3.1.1 Main Component Checking Point ............................................................... 3-1

3.1.2 Error............................................................................................................... 3-3

3.2 UNIT LEVEL TROUBLESHOOTING....................................................3-4

3.3 UNIT REPAIRING OF THE POWER SUPPLY BOARD .....................3-11

3.4 UNIT REPAIRING OF THE MAIN BOARD......................................... 3-13

3.5 REPAIRING THE PRINTER MECHANISM......................................... 3-16

DISASSEMBLY AND ASSEMBLY

4.1 OVERVIEW ..........................................................................................4-1

4.1.1 Disassembly Precautions........................................................................... 4-1

4.1.2 Tools and Instruments................................................................................. 4-1

4.1.3 Service Check After Repair.......................................................................... 4-2

4.1.4 Abbreviations for Small Parts...................................................................... 4-3

4.2 DISASSEMBLY AND ASSEMBLY....................................................... 4-4

4.2.1 Printhead Removal....................................................................................... 4-5

4.2.2 HP (Home Position) Detector Removal....................................................... 4-6

4.2.3 Pre-disassembly Procedures ...................................................................... 4-7

4.2.4 Upper Housing Removal.............................................................................. 4-8

4.2.5 C229MAIN Board Removal........................................................................... 4-9

4.2.6 C229PSB/PSE Board Removal.................................................................. 4-11

4.2.7 ROM Removal ............................................................................................. 4-12

4.2.8 Platen Removal........................................................................................... 4-13

4.2.9 Printer Mechanism Removal...................................................................... 4-14

4.2.10 Printer Mechanism Disassembly............................................................. 4-15

4.2.10.1 CR Motor Removal.......................................................................... 4-15

4.2.10.2 PF Motor Removal.......................................................................... 4-16

4.2.10.3 PF Gear Train Disassembly............................................................ 4-17

4.2.10.4 PG (Platen Gap) Detector Removal................................................ 4-18

4.2.10.5 Release Detector Removal............................................................. 4-18

4.2.10.6 Front PE (Paper End) Detector Removal........................................ 4-19

4.2.10.7 Rear PE Detector Removal............................................................. 4-19

4.2.10.8 Carriage Assembly Removal........................................................... 4-20

4.2.10.9 Rear Paper Guide Assembly Removal............................................ 4-21

4.2.10.10 Ribbon Drive (RD) Assembly Removal......................................... 4-22

ADJUSTMENT

5.1 ADJUSTMENT OVERVIEW ................................................................. 5-1

5.1.1 Required Adjustment ................................................................................... 5-1

5.1.2 Adjustment Tools ......................................................................................... 5-1

5.2 ADJUSTMENT AND RESETTING THE PRINTER............................... 5-2

5.2.1 Platen Gap Adjustment ................................................................................ 5-2

5.2.2 Factory Setting.............................................................................................. 5-4

5.2.3 Bi-D Adjustment............................................................................................ 5-6

MAINTENANCE

6.1 PREVENTIVE MAINTENANCE............................................................6-1

6.2 LUBRICATION ..................................................................................... 6-2

APPENDIX

7.1 CONNECTOR SUMMARY ................................................................... 7-1

7.2 COMPONENT LAYOUT....................................................................... 7-6

7.3 EXPLODED DIAGRAM ........................................................................ 7-9

7.4 DIMENSION AND WEIGHT................................................................ 7-11

7.5 CIRCUIT DIAGRAM ...........................................................................7-12

CHAPTER

PRODUCT SPECIFICATION

FX-880 Service Manual

Chapter 1 Product Description

1.1 SPECIFICATION

The FX-880 is a small hoot, 9 pins serial impact dot m atrix printer. The main specif icat ion is as follows;

HARDWARE SPECIFICATIONS

Print method 9 pins Impact dot matrix Print pin arrangement 9 ´ 1 Print pin diagrams 0.29 mm ( 0.0114 inch )

RESOLUTION

Table 1-1. Resolution ( dpi )

Printing mode Horizontal

density

High speed draft 90 72 No Draft 120 72 No NLQ 240 144 No Bit image 60, 72, 80, 90 or

120

120 or 240 72 No

PRINTING SPEED

Table 1-2. Printing Speed (cps)

Printing mode Character

pitch

High speed Draft 10cpi 80 410 345 Draft 10cpi 80 310 260 NLQ 10cpi 80 78 65

l When the power supply voltage drops to the lower limit, the pr inter stops printing once and

then starts to print rest dat a on that line again more slowly than before.

l When the head temperature rises to the upper limit, the print er st ops pr inting once. If the

head temperature falls down to t he nor m al level, it begins to print again mo r e slowly than before.

Printable

column

Vertical density Adjacent dot

72 Yes

Printing speed

Normal Copy

FEEDING METHOD

Friction feed Front, Rear Push tractor feed Front, Rear Push & Pull tractor feed Front, Rear Pull tractor feed Front, Rear, Bottom

FEED SPEED

Normal mode 62 ms 1/6 inch feed

0.127MPS ( 5.0 IPS) continuos feeding

Copy mode 83 ms 1/6 inch feeding

0.078MPS (3.1 IPS) continuos feed

FEEDER

Front push tractor Rear push tractor CSF ( Option, bin1 / bin2 ) Pull tractor ( Option ) Roll paper holder ( Option )

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Chapter 1 Product Description

PAPER / MEDIA

Table 1-3. Cut Sheet

Insertion Front entry Rear entry Width 148 ~ 257mm ( 5.8 ~ 10.1”) Length 182 ~ 364mm ( 7.2 ~ 14.3” ) 92 ~ 364mm ( 3.6 ~ 14.3”) Thickness 0.065 ~ 0.14mm ( 0.0025~ 0. 0055” ) Weight 52 ~ 90g/m2 (14 ~ 24 lb) Quality Plain paper, Reclaimed paper *, not curled, not folded, not cr um pled

Table 1-4. Cut Sheet ( Multi-Part )

Insertion Front entry Width 182 ~ 257mm ( 7.2 ~ 10.1” ) Length 182 ~ 364mm ( 7.2 ~ 14.3” ) Copies 1(original) + 5 Total thickness 0.12 ~ 0.46mm ( 0.0047 ~ 0.018” ) Weight 40 ~ 58g/m2 ( 12 ~ 15 lb) Quality Plain paper, Reclaimed paper, not curled, not folded, not crumpled Jointing Line glue at the top or one side of form

Table 1-5. Envelope

Insertion Rear entry only Envelope No.6 No.10 Width 165mm ( 6.5” ) 241mm ( 9.5” ) Length 92mm ( 3.6” ) 105mm ( 4.1” ) Total thickness 0.16 ~ 0.52mm ( 0.0063 ~ 0.020” ) The difference of thickness at the printable area is within 0.25m m

( 0.0098” ) Weight 45 ~ 90g/m2 ( 12 ~ 24 lb ) Quality BOND paper, plain paper, air mail, no glue at a flap, not curled, not

folded, not crumpled

Table 1-6 Continuous Paper ( Single Sheet and Multi-Part )

Insertion Front entry Rear entry Bottom entry Width 101. 6 ~ 254m m ( 4 ~ 10” ) Length 101.6 ~ 558.8mm ( 4 22” ) Copies 1(original) + 5 Total thickness 0.065 ~0.46mm ( 0.0025 ~ 0.018” ) Weight 52 ~ 82g/m2 ( 14 ~ 22 lb ) Weig ht ( multi part) 40 ~ 58g/m2 ( 12 ~ 15 lb ) Quality Plain paper, Reclaimed paper, carbon less mult i part paper Jointing Point g lue or bot h sides paper staple

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Chapter 1 Product Description

Table 1-7. Continuous Paper wit h Label s

Insertion Front entry Bottom entry Label size See the figure below;

63.5m m (2.5")

Label

23.8m m ( 15/16" )

R 2.5m m ( 0.1" )

Figure 1-1. Label

Base sheet width 101.6 ~ 254.0mm ( 4 ~ 10” ) Base sheet length 101.6 ~ 558.8mm ( 4 ~ 22” ) Base sheet thickness 0.07 ~ 0.09mm ( 0.0028 ~ 0.0035” ) Total thickness 0.16 ~ 0.19mm ( 0.0063 ~ 0.0075” ) Label weight 68g/m2 (17 lb) Quality A very continuous form labels, a very mini-line labels or the

same quality labels

Table 1-8. Roll Paper

Insertion Rear entry Width 216mm ( 8.5” ) Thickness 0.07 ~ 0.09mm ( 8.5” ) Weight 52 ~ 82g/m2 ( 14 ~ 22 lb ) Quality Plain paper, not curled, not folded, not crumpled

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Chapter 1 Product Description

TYPEFACE

Bit map Font EPSON Draf t 10cpi, 12cpi, 15cpi

EPSON Roman 10cpi, 12cpi, 15cpi, Proportional EPSON Sans Serif 10cpi, 12cpi, 15cpi, Proportional

Bar code fonts EAN-13, EAN-8, I nterleaved 2 of 5, UPC-A, UPC-E, Code 39,

Code 128, POSTNET

CHARACTER TABLES

Standard version 11 tables NLSP version 19 tables

INPUT BUFFER

0 Kbytes / 32 Kbytes

ELECTRICAL SPECIFICATION

120 V version Rated voltage AC 120 V Input voltage range AC 103.5 to 132 V Rated frequency range 50 to 60 Hz Input frequency range 49.5 to 60.5 Hz Rated current 0.7 A ( Max. 1.6 A ) Power consumption Approx. 34 W ( ISO/IEC10561 Letter pattern) Insulation resistance Min. 10 MW ( between AC line and chassis) Dielectric strength AC 1000 V rms 1 min. or AC 1200 V rms 1 sec.(between AC line and

chassis) 230 V version Rated voltage AC 220 to 240 V Input voltage range AC 198 to 264 V Rated frequency range 50 to 60 Hz Input frequency range 49.5 to 60.5 Hz Rated current 0.4 A ( Max. 0.9 A ) Power consumption Approx. 34 W ( ISO/IEC10561 Letter pattern)

Energy Star compliant Insulation resistance Min. 10 M W ( between AC line and chassis) Dielectric strength AC 1000 V rms 1 min. or

AC 1200 V rms 1 sec. ( between AC line and chassis)

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Chapter 1 Product Description

ACOUSTIC NOISE

55 dB(A) ( ISO 7779 patt er n )

ENVIRONMENTAL CONDITION

Temperature 5 to 35 °C ( Operating )

-30 to 60 °C ( Non-operating)

Humidity 10 to 80 % ( Operating without condensation )

0 to 85 % ( Non-operation without condensation)

RELIABILITY

Total print volume 6.5 million lines ( Except Print head) MTBF (4000 POH ) Print head life approx. 100 million characters

RIBBON CARTRIDGE

Type Fabric Color Black Ribbon life Approx. 3 million characters ( Draft 10 cpi, 14 dot / chr. )

SAFETY APPROVALS

120 V version Safety standards UL 1950 CSA C22.2 No. 950 EMI FCC part 15 subpart B class B, CSA C108.8 class B 230 V version Safety standards EN60950 ( VDE, NEMKO ) EMI EN55022 ( CISRP pub.22 ) class B

AS/NSZ.3548 class B

CE MARKING

230 V version Low Voltage Directive 73/23/EEC

EN60950

EMC Directive 89/336/EEC EN55022 class B

EN61000-3-2 EN61000-3-3 EN50082-1 IEC801-2 IEC801-3 IEC801-4

INTERFACE

Bi-directional parallel Interface ( IEEE-1284 nibble mode supported ) Type-B I/F level 2 ( Option )

CONTROL CODE

ESC/P IBM 2380 Plus emulation

PHYSICAL SPECIFICATIONS

Dimensions 415mm( W ) ´ 350mm ( D ) ´ 154mm ( H )

Weig ht Approx. 7.6 kg

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Chapter 1 Product Description

CONSUMPTION & OPTIONS

Table 1-9. Consumable & Option

Consumption Code No.

Ribbon cartridge #8750 Ribbon pack #8758

Options

High capacity cut sheet feeder ( Bin1 ) C80638* Single bin cut sheet feeder ( Bin 2 ) C80637* Pull tractor unit C80020* Roll paper holder #8310 Front paper guide C81402* Front sheet guide C81400* Serial Interface card C82305* / C82306* 32KB intelligent serial Interface card C82307* / C82308* 32KB intelligent Interface card C82310* / C82311* Local Talk I/F card C82312* 32KB IEEE-1284 I/F card C82313* Coax I/F card C82314* Twinax I/F card C82315* IEEE-1284 parallel I/F card C82345* Ethernet I/F card C82347*

“*”: According to each destination.

FX-880 Service Manual

Figure 1-2. Exterior View of the FX-880

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FX-880 Service Manual

Chapter 1 Product Description

1.2 OPERATION

This section describes the operations equipped with this print er.

1.2.1 Control panel

The control panel of this print er consist s of 5 switches and 5 LEDs, as shown below;

Font

Draft D raft C ondensed Rom an R om an C ondensed Sans serif Sans serif C ondensed

T e a r O ff/B in

Tear off Bin1 Bin2

LF/FF

M icro A djust

Load/Eject

Pause

3sec

Paper O ut

O perate

Figure 1-3. Panel Operation Outline

1.2.2 Switches

1.2.2.1 Usual Operation

In the normal mode, pressing panel switches executes the following functions;

Operate

(1)

This switch turns the printer on and off it is the secondary switch in the power supply circuit.

CAUTION

Unplug the power cable from the AC Inlet when connecting/ disconnecting the Interface cable to/from t he pri nt er.

Pause

(2)

This switch alternates printer activity between printing and non-printing states. If this button is held down for over 3 seconds when the printer is in t he non-printing status, the Micro Adjust function and Font selection are enabled. If it is pressed again, these function are disabled.

Load/Eject

(3)

- Loads the paper when the printer is out of paper .

- Ejects the paper to the paper par k.

LF/FF

(4)

- Feeds a line if pressed shortly.

- Feeds the continuos paper or eject the cut sheet .

Tear Off

(5)

Advances the continuos paper to the Tear-OFF posit ion. If it is pressed again, the paper is moved to the TOF position.

Bin

(6)

Selects the CSF bin number when the CSF is used.

Font

(7)

Selects the font fr om t he list on the panel when the Micro Adjust function is enabled.

Micro Adjust

(8)

The Micro Adjust switch is available in the Micro Adjust mode. Micro switch executes micro feed forward or backward by 1/216 inch one by one. The TOF adjustment is enabled in t he TOF position after loading t he paper, and the Tear-off adjustment is enable in the Tear-off position.

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Chapter 1 Product Description

1.2.2.2 Operations at Power-on

Pressing the specified switch (switches) while turning on the pr int er enables the following special functions:

1. Self test

- Switches : Function: Executes the printing LQ self t est printing.

- Switch: Function: Executes the Draft self t est printing.

2. Data dum p m ode

Switches : Function: Executes the data dump function.

3. Clearing the line counter value for the r ibbon life in the EEPROM

Switches: Function: Clears the line counter value stored in the EEPROM.

4. Bi-D adj ust m ent

Switches: Function: Executes the Bi-D adjustment.

Load / Eject LF / FF

Load / Eject

Tear-off / Bin

Pause

turning on the printer.

switch, while turning on the printer.

while turning on the printer.

LF / FF

and

switches at same time while turning on the printer.

Pause

at same time while turning on the printer.

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Chapter 1 Product Description

1.2.3 Indicators ( LEDs )

This printer has the following indicators to indicate its current condition as shown in the table below:

Pause ( Orange )

Comes On when the printer is paused, and goes Off when the printer is not paused. Blinks when the Micro adjust function and the Font selection are enabled or the printhead is in the overheated condition.

Paper Out ( Red )

Comes On when the printer is in the Paper out condition. Blinks when the paper eject error has occurred .

Tear Off / Bin ( Green )

Blinks when the continuos paper is in the tear off position. Comes On when the CSF Bin1 is selected, and goes Off when the CSF Bin2 is selected.

Font ( Green )

Indicates the font selections.

Table 1-10. LED Status

Pause Paper out error Release lever error Paper eject warning Head hot warning Micro adjust & Font selection Tear off

Bin selection Font selection According as

Fatal error Blinks Blinks Blink s Blinks

Printer status

Font Tear-Off /

Bin

¾¾ ¾ ¾ ¾¾ ¾ ¾ ¾¾ ¾ ¾ ¾

font selection

According as paper path According as bin selection

¾¾¾

Pause Paper Out

On On On On

On Blinks Blinks Blinks Blinks

¾¾

¾ ¾

1.2.4 Buzzer

This printer has the buzzer to indicate its current condition with the following indications:

Table 1-11. Buzzer Status

Printer status Beep sounds

Paper out error Release lever error – – – – – Paper eject warning Illegal panel operation

Note: The symbols used in the table represents t he f ollowing:

“ Ÿ ” = A beep sounds for approximately 100 ms with the interval of appr oxim at ely 100 m s . “ – “ = A beep sounds for approximately 500ms wit h t he interval of approximately 100ms.

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FX-880 Service Manual

Chapter 1 Product Description

1.2.5 Default setting mode 1

You can change some parameters that t he pr inter refers to at pr int er initialization.

1.2.5.1 Setting Method

Refer to the following f lowchart for the default sett ing mode 1.

START

H o ld in g d o w n

Language selection sheet

Push down

Select the m enu, select m ethod and current setting are printed.

Tear off/ B in

tu rn o n th e p rin te r.

C hange the language?

Tear off/ B in

s w itc h ,

YES

sw itch.

Push down

select the aim ed language.

Lo ad/E ject

s w itc h to

R e fe rrin g to th e F o n t a n d T e a r o ff/ B in LED s, push sele ct the m enu .

R eferring to the Pause and Paper

O u t L E D s , p u s h

Tear off/B in

to change the setting value.

Finish?

T u rn th e p rin te r o ff to s a v e th e

settings.

s w itc h to

Load /Eject

END

sw itch

Figure 1-4. Flowchart f or Def aul t Setting Mode 1

1.2.5.2 Setting Items

Setting values available for the default set ting mode including factory sett ings are as shown in the following table:

Table 1-12. Setting Values Available for Default Setting Mode 1

Items Setting values

(BOLD font : factory setting)

Skip over perforation Auto tear off Auto line feed Print direction I/F mode Auto I/F wait time Software 0 slash High speed draft Input buffer Buzzer Auto CR ( IBM 2380 Plus )*1 IBM character table

Bi-D

Auto

, Parallel, Option

0 sec

ESC/P

table 2

Off

On,

Off

On,

Off

On,

, Uni-D ., 30 sec.

, IBM 2380 Plus

, Ø

, Off

Off

On,

, table 1

( IBM 2380 Plus )*1

*1: This setting is effective when the I BM 2380 Plus em ulat ion is select ed only.

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1-1

1.2.6 Default Setting Mode 2

Refer to the following f lowchart for the default sett ing mode 2.

START

FX-880 Service Manual

Chapter 1 Product Description

H o ld in g d o w n

LF/FF

s w itc h e s , tu r n th e p rin te r o n .

Language selection sheet

C hange the language?

Push down

Select the m enu and the m ethod,

and the current settings are printed.

Tear off/ B in

Tear off/ Bin

and

YES

sw itch.

Figure 1-5. Flowchart f or Def aul t setting mode 2

Push down

select the aim ed language.

Lo ad/E ject

s w itc h to

R eferring to the Font and Tear

o ff/ B in L E D s , p u s h

sw itch to se le ct the m e nu.

R eferring to the P ause and Paper

O u t L E D s , p u s h

to change the setting value.

T u rn th e p rin te r o ff to s a v e th e

Load /Eject

Finish?

settin gs.

END

Tear off/Bin

sw itch

1.2.6.1 Setting Items

Setting values available for the default set ting mode including factory sett ings are as shown in the following table:

Table 1-13. Setting Values Available for Default Setting Mode 2

Items Setti ng values (BO LD f ont : factory setting)

Page length for front tractor 3 inch, 3.5 inch, 4 inch, 5.5 inch, 6 inch, 7 inch, 8 inch, 8. 5 inch,

11 inch

Page length for rear tractor 3 inch, 3.5 inch, 4 inch, 5.5 inch, 6 inch, 7 inch, 8 inch, 8.5 inch,

11 inch

Character table Standard version:

Italic, Abicomp, Roman 8, ISO Latin 1 NLSP version: Italic, PC857, PC866, PC869, MAZOW IA, Code MJK, ISO 8859-7, ISO Latin 1T, Bulgar ia, PC774, Estonia, ISO 8859-2, PC866

LAT. International character set for Italic table

Italic U.S.A.

Denmark 1, Italic Sweden, It alic Italy, Italic Spain 1

, 70/6 inch, 12 inch, 14 inch, 17 inch , 70/6 inch, 12 inch, 14 inch, 17 inch

PC437

, PC850, PC860, PC863, PC865, PC861, BRASCII,

, PC850, PC437 Greek, PC 853, PC855, PC852,

, Italic France, Italic Germany, Italic U.K., Italic

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FX-880 Service Manual

Chapter 1 Product Description

1.2.7 EEPROM Clear Function

You can change some parameters into the factory settings to perform panel operation easily. Pressing default settings into the factory settings:

Tear off / Bin

Table 1-14. Cleared Items and Values on EEPROM (Standard M odel)

Character table selection PC437 Page length for rear tractor 11 inch Page length for front tractor 11 inch Page length for CSF bin 1 22 inch Page length for CSF bin 2 22 inch TOF adjustment value for rear tractor 8.5 mm TOF adjustment value for front tractor 8.5 mm TOF adjustment value for CSF bin 1 8.5 mm TOF adjustment value for CSF bin 2 8.5 mm TOF adjustment value for rear manual insertion 8.5 mm TOF adjustment Value f or front manual insertion 8.5 mm Bottom margin for rear tractor 11 inch Bottom margin for front tractor 11 inch Font Selection Draft 10 cpi Print direction setting Bi-D I/F mode selection Auto Auto I/F waiting time setting 10 sec. Auto line feed Off Auto tear off Off Skip over perforation Off High speed draft On Input buffer On Software ESC/P 0 slash Off Buzzer On Auto CR Off Tear-off adj ustment value 0 Manual insertion time 2 or 3 sec. Tear-off wait time 3 sec. I/F timing data BUSY timing data TOF minimum value 4.2 mm Paper edge length 0 Paper length for rear m anual insertion 22 inch Paper length for front manual insertion 22 inch sub number for customization Standard

Load / Eject

and

switches at same time while turning on the printer turns the

Item Value

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1-1

1.2.8 Bi-D Adjustment

Refer to the following f lowchart for the Bi-D adjustment.

START

FX-880 Service Manual

Chapter 1 Product Description

H o ld in g d o w n the printer on, and the first alignm ent patter is printed along w ith th e g u id e fo r th e a d ju s tm e n t.

[S te p A ] S e le c t th e n u m b e r fo r th e m o s t closely aligned pattern by pressing the LF/FF sw itch and Load/E ject sw itches.

[S te p B ] Fix the selected num ber by p re s s in g T e a r O ff/B in s w itc h , a n d the next alignm ent patter is printed.

R epeat S teps A and B until finishing the a d ju s tm e n t fo r th e fo llo w in g m o d e s : 1 . H ig h s p e e d d ra ft m o d e 2 . D ra ft m o d e 3 . N L Q m o d e

Pause sw itch,

tu rn

T u rn th e p rin te r o ff, a n d th e n e w settings are stored in the non-volitile memory.

END

Figure 1-6 . Bi-D Adjustment flowchart

Rev. A

1-1

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OPERATING PRICIPLES

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FX-880 Service Manual

Chapter

2 Operating Principles

2.1 MAIN COMPONENTS

This printer is divided into several main components for easy removal and repair. The main components are :

z C229MAIN : Control board z C229PSB/PSE : Power supply board z C229PNL : Operation panel board z M-3J10 : Printer mechanism z Housing : Upper case, Lower case, Rear sheet guide, Knob, Printer cover

2.1.1 C229MAIN Board

The C229MAIN board consists of CPU TMP96C141AF (IC3), gate array E05B50 (IC2), EEPROM AT93C46 (IC4), 1/4M PSRAM (IC5), 2/4M PROM (IC7), driver elements, and so on.

P F M o to r D riv e r IC

CN3

Print H ead D river

C R M o to r D r iv e IC G a te a rra y

CPU

EEPRO M

E05B 50

PSRAM

PRO M

Figure 2-1 . C229MAIN Component

2.1.2 C229PSB/PSE Board

The C229 PSB/PSE power supply board consists of Transformer, Switching FET, Regulator IC, Diode bridge, Fuse, Photo-coupler, and so on.

Fuse

CN1

Switching FET

Photo-coupler

Transform er

R e g u la to r IC

Rev. A

CN2

D iode B ridge

Figure 2-2. C229PSB/PSE Component

2-1

FX-880 Service Manual

Chapter

2 Operating Principles

2.2 PRINTER MECHANISM

This printer mechanism consists of Printhead, Paper feed mechanism, Carriage movement mechanism, Tractor feed mechanism, Platen gap adjustment mechanism, Ribbon feed mechanism, PF motor, CR motor, detectors, and so on.

2.2.1 Printhead

The printhead prints data from the control board on paper using the ink ribbon. The printhead is mounted on the carriage unit.

2.2.2 Paper Feed Mechanism

The paper feed mechanism picks up paper and transports it to the printhead, then ejects it step by step or continuously driven by the PF motor. PF motor drives the paper feed mechanism gears and the platen roller. The top of form and paper out condition are detected by front and rear PE detector, respectively.

2.2.3 Carriage Movement Mechanism

The carriage movement mechanism carries the carriage unit left and right along the CR guide shaft and mechanism frame and stops it at any position for printing. It is driven by the torque sent from the CR motor via the timing belt. Home position is detected by the HP (home position) detector at power on and CR motor phase changing timing.

2.2.4 Tractor Feed Mechanism

The tractor feed mechanism feeds continuous paper to the printhead and ejects it. The torque from the PF motor is transferred to the tractor unit via the release mechanism in the paper feed mechanism. The release mechanism switches the PF motor torque between cut sheet feeding and continuous paper feeding by the release lever. This printer is equipped with several tractor feeding methods (front / rear push tractor feeding, front / rear push & pull tractor feeding and front / rear pull tractor feeding), which is selected according to the tractor unit setting positions and the lever positions. The tractor detector detects the release lever setting position in cut sheet feeding or continuous paper feeding.

2.2.5 Platen Gap Adjustment Mechanism

The platen gap (the gap between the platen and the printhead) adjustment mechanism consists of CR guide shaft, parallelism adjustment bushing, PG adjust lever and PG detector. PG adjust lever is attached to the left side of the CR guide shaft. The bushings are attached to the both sides of the frame. As the both sides part of CR guide shaft is eccentric toward external form of it, printhead approaches or recedes from the platen roller to turn the PG lever forward or backward. PG detector detects PG lever position. If the lever is set 2nd and more position, the printer gets into copy mode.

2.2.6 Ribbon Feed Mechanism

The CR motor drives the ribbon feed mechanism via the timing belt. The ribbon feed mechanism has the sun and planetary gear system. No matter the carriage unit is driven left and right, the ink ribbon is driven in one direction.

Rev. A

Chapter

FX-880 Service Manual

2 Operating Principles

Tractor

Front P E detector

Rear PE DEtector

P a ra lle lis m B u s h in g

Platen R oller

P rinthead

C R G uide S haft

R elease Lever

R elease D etector

P F M o to r

P a ra lle lis m B u s h in g

R ibbon Feed M echanism

PG Adjust Lever

Carriage Unit

HP Detector

Tim ing Belt

Figure 2-3. Printer Mechanis Outline

CR Motor

Rev. A

FX-880 Service Manual

Chapter

2 Operating Principles

2.3 CIRCUIT OPERATION

2.3.1 C229PSB/PSE Power Supply Circuit

This printer can be powered by either of two power supply boards: the C229PSB (120V) board or the C229PSE (230V) board. The function of these two boards is the same , except for a difference in the primary circuitry. The power supply outputs the DC current necessary to drive the printer control circuit and drive the mechanism. The input voltages and fuse ratings for these boards are as shown in the following table:

Table 2-1. Input Voltage and Fuse Rating

Board Input Voltage Fuse F1 Rating

C229PSB 85-138VAC 4A, 125V or 250V C229PSE 187-276VAC T2.0AH, 250V

The power supply circuit outputs voltages used to drive the various control circuits and the mechanism, as shown in the following table:

Table 2-2. Output Voltages and Applications

Output Voltage Applications

5V•}5% 0.7A

Logic lines

(Type-B I/F output is included.) Detectors

Panel Switches & LEDs

35V•}6% 0.8A

CR Motor PF Motor Printhead

The power supply circuit consists of the line filter circuit, ZC-RCC (Zero-Cross Ringing Choke Converter) switching circuit and 5V chopper regulator IC. The AC voltage is first input to the line filter circuit for higher harmonics absorption, then input to the switching circuit and transformed to +35VDC. +5VDC is generated from +DC35V by the regulator IC. The over current / voltage protection circuit is also designed on the board. The power switch is set in the secondary circuit that is controlled by the signal PSC from the control panel.

AC Line In p u t

Line F ilter

ZC-RCC Switching Regulator

- O ver C urrent protection

- O ver V oltage protection

R e g u la to r IC

+35V D C

+5VD C

PSC

Figure 2-4. Power Supply Circuit Block Diagram

Rev. A

FX-880 Service Manual

Chapter

2 Operating Principles

2.3.2 C229MAIN Board Circuit

The C229MAIN board is the control circuit board of this printer. This board consists of several IC chips and drivers, as shown in the table below:

Table 2-3. Function of the Main IC

Element Location Function

TMP96C141AF IC3 16 bit CPU runs at 14.47MHz

- Main controller

- Detectors control

- CR Motor Control

E05B50 IC2 Gate array : System Controller

- Parallel I/F control

- Option Type-B I/F control

- Panel Switch, LED control

- Printhead Control

- PF Motor Control

- CR Motor Current control PST594E IC1 Reset IC : Hardware reset function AT93C46 IC4 EEPROM :

System control data (Market, TTL threshold, Bi-D setting, Page length, TOF, etc.) containing

PSRAM IC5 1M/4M bit

- Buffer and Working area of CPU & Gate array ROM IC7 2/4M bit EPROM/ Mask ROM

- Control program containing SLA7024M IC8 CR Motor driver A2917SEB IC11 PF Motor driver Comparator IC12 Power-off signal sensing

O peration Panel

P a ra lle l I/F

Type-B I/F (O ption)

PF Motor Driver

P rinthead

Head Driver

G.A.

E 05B 50

(IC 2 )

CR Motor Driver

Therm istor

Addres/DATA Bus

PSRAM

ROM

R e s e t IC

EEPRO M

CPU

TM P 96C 01A F

(IC 3 )

+35V D etector

P G D e te c to r

Rear PE Detector

Front PE Detector

HP Detector

R elease Lever D etector

Figure 2-5 . C229MAIN Board Circuit Block Diagram

Rev. A

FX-880 Service Manual

Chapter

2 Operating Principles

The data from the host computer is stored in the input buffer once, then converted into image data and transmitted to the printhead through the gate array, as shown in the figure below:

H ost com puter

Print data conversion

Im age data tra n s fe r

CPU

D a ta la tc h

and

data output

Gate array

Figure 2-6. Data Flow

Input buffer

Im age buffer

RAM

Printhead driver

circuit

Rev. A

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Epson FX-880 Service Manual

Specifications and Main Features

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