Epson FX-880 Service Manual

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EPSON FX-880

®

4008484

NOTICE

All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or

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.

Copyright © 1996 SEIKO EPSON CORPORATION. Printed in Japan.

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

1

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

print

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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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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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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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

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 )

1.

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 )

2.

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

Tear Off / Bin ( Green )

3.

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 )

4.

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

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

¾

¾

¾

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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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?

NO

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

1

ESC/P

table 2

Off

On,

Off

On,

Off

On,

, Uni-D
., 30 sec.

, IBM 2380 Plus

0

, Ø

On

, Off

On

, Off

On

, 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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1.2.6 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

NO

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

PC437

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

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

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

Rev. A

1-11

FX-880 Service Manual

2

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

Rev. A

1-1

3

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

&+$37(5

OPERATING PRICIPLES



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

2

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

2-

Chapter

3

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

2-

FX-880 Service Manual

4

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

2-

FX-880 Service Manual

5

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

CG

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

2-

FX-880 Service Manual

6

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

2-

TROUBLESHOOTING

&+$37(5



FX-880 Service Manual

Chapter

3 Troubleshooting

3.1 OVERVIEW

The printer may exhibit different symptoms for the same problem, which makes troubleshooting
more difficult. This section, however, provides simple and effective ways to facilitate
troubleshooting. The following flowchart illustrates the main steps of the troubleshooting process.

START

Unit Level Tr oubl es hoo ting

Unit Repair of the

C229PSB/PSE Board

Unit Repair of the

C229MAIN Board

Assembly and Adjustment

END

Unit Repair of

M-3J10 Mechanism

Figure 3-1. Troubleshooting Process Flowchart

3.1.1 Main Component Checking Point

The following components can be checked by a simple measurement equipment such as a multi­meter, etc.) easily.

Table 3-1. Motor Coil Resistance Test Points

Motor

Connector

Number

PF Motor
(CN8)

CR Motor
(CN9)

Rev. A

Test Pin

Number

(Set Meter to Ohms. Disconnect

Test Method

Motor from Main Board and check it

with Printer Power off.)

1 and3, 2 and 4 Place one lead on pin 1 (pin2) and the

other lead on pin3 (pin 4) each of the
test pins to check the two motor phases.

Common pin : 5,

Test pins : 1, 2, 3

and 4

Place one lead on pin 5 and the other
lead on each of the 4 test pins to check
the two motor phase.

Meter Reading

16.0

Ω ± 10%

(at 25°C par one

phase)

2. 7 Ω ± 10%

(at 25°C par one

phase)

3-1

2

Table 3-2. Printhead Solenoid Resistance

FX-880 Service Manual

Chapter

3 Troubleshooting

Part Test Pin

Number

(See the figure

berlow.)

Printhead

Common pin C1 :
Test pin 1, 4

Common pin C2 :
Test pin 8
Common pin C3 :
Test pin 2, 6
Common pin C4 :
Test pin 5, 9
Common pin C5 :
Test pin 3, 7

Test Method

(Set Meter to Ohms. Disconnect

Motor from Main Board and check it

with Printer Power off.)

For example, place one lead on pin C1 and
the other lead on Test pin 1 to check #1 pin
Printhead solenoid. The test pin num ber is
just match with the printhead solenoid (dot
wire) number.

Printhead Connenctor

Specifications

8.19 ± 0.8Ω (at 25°C)

Printhead

2

6

C1

C2

4

View A

C5

8

9

1

T

T

3

5

7

Printhead Connenctor

C4

C3

Figure 3-2. Printhead Connector Pin Alignment

Table 3-3. Printhead Driver Test Pint

Transistor Numbers Test Method

(Set meter to diodes. Check

power off.)

Q2, Q3, Q4, Q5, Q6,Q7, Q8,
Q9, Q10

Check from base to collector,
and check from base to
emitter. Reverse leads and test

again.
Q11,Q12, Q13, Q14, Q15,
Q16, Q17, Q18, Q19, Q20

A

Meter Reading

Not open and not shorted from
base to collector, base to
emitter.

Rev. A

3-

3

Table 3-4 Detector Test Point

FX-880 Service Manual

Chapter

3 Troubleshooting

Detector Connector

Number

HP Detector
(CN4)

Front PE Detector
(CN6)

Release Lever Detector
(CN10)

PG Detector
(CN11)

Printhead thermistor Place one lead on pin T and the

(Set Meter to Ohms. Check the

Place one lead on pin 1 and the
other lead on pin 2, and toggle the
detector actuator.
Place one lead on pin 1 and the
other lead on pin 2, and toggle the
detector actuator.

Place one lead on pin 1 and the
other lead on pin 2, and toggle the
detector actuator.
Place one lead on pin 1 and the
other lead on pin 2, and move the
detector actuator from -0 to 6.

other lead on other pin T to check
the resistance.(Refer to Fig.3-2.)

Test Method

Printer power off.)

Meter Reading

Meter should toggle between
open and short. (LOW: within
CR Home position.)
Meter should toggle between
open and short. (HIGH:
paper is installed in the
printer.)
Meter should toggle between
open and short. (HIGH:
Friction Feed mode.)
Meter should toggle between
open and short.
(HIGH: PG -1 ~ 3.)

Approx. 14KΩ (at 17°C)

3.1.2 Error

As this printer checks its condition by itself at power-on, when it finds any trouble, it indicates it
with error indication buzzer and LEDs. The error Indications and countermeasures are shown in
the table below:

Error LED Status Buzzer Cause Disposition

Paper out error Paper Out: On

Pause: On
Release lever
error

Fatal error All LEDs : Blink

Note: Symbols used in the table represent the following:

“∗” : A beep sounds for approx. 100 ms with the interval of approx. 100ms.
“-“ : A beep sounds for approx. 500 ms with the interval of approx. 100ms.

Pause: ON

***

-----



The printer fails to load
paper.
The release lever is set
to a wrong position.

The carriage unit gets
into out of control or
power supply voltage
becomes incorrect.

Set paper to the
printer correctly.
Set the release
lever to the
correct position.
Turn off the
printer once and
turn it back on.

Rev. A

3-

FX-880 Service Manual

4

Chapter

3 Troubleshooting

3.2 UNIT LEVEL TROUBLESHOOTING

You may be able to Identify the defective unit just from the symptom displayed. The table below
provides the symptoms for a number of failures, so that you can easily Identify the problem. Once
the problem has been identified, refer to the flowchart listed In the right-hand column of the table
below to determine the case of the problem.

Table 3-5. Symptoms and Problems

Symptom Problem See Page

Printer fails to operate
when power is on.
Abnormal carriage
operation at power on.

Printing is faulty during
self-test, but carriage
operation is normal.
Abnormal paper
feeding
Abnormal control panel
operation
Data sent by the host
computer is printed
incorrectly

z Carriage dose not move.
z Control panel indicator LEDs do not light.
z Carriage moves away from the home position at

power on.

z Carriage returns to home position correctly, but the

printer then fails to enter the READY mode.

z No printing at all.
z Faulty printing  some of the dots are not printing.

The printer prints but feeds paper Incorrectly.
When the LF/FF switch is pressed, no paper is fed.
z Carriage operates normally at power on, and self-

test is executed correctly, but data is not printed.

z Data from the computer is printed incorrectly.

3-5

3-6

3-7

3-8

3-9

3-10

The repair procedure flowcharts use the following symbols:

START

Start

Preocessing

Forwarding to
another items

END

Decision

Figure 3-3. Symbols Used in the Flowcharts

Branching

Return to the
Start of the item

END

Rev. A

3-

5

1. Printer fails to operate when power is on.

START

FX-880 Service Manual

Chapter

3 Troubleshooting

Is AC input voltage normal?

120V version: 85 - 138V

230V version: 187 - 276V

YES

Are the fuses F1 on

C229PSB/PSE bl own?

NO

Measure the +35V line at pin 7

or 8 of CN2 on C229PSB/PSE.

Is output voltage

normal?

YES

Measure t he +5V line at pin 3 or 4

of CN2 on C229PSB/PS E.

NO

NO

YES

Use the correct AC input voltage.

No fluctuation from AC voltage range is

NO

Is the ne w f use also blow n w h en

power is turned on again?

permitted.

Replace the fuse.

YES

Replace the C229

PSB/PSE.

Rev. A

Is output voltage

normal?

YES

Verify each motor and printhead solenoid

resistance,referring to Table 3-1 and Table 3-2.

Are the resistance

normal?

YES

Replace the C229MAIN.

NO

NO

END

Figure 3-4. Flowchart (1)

Replace the C229

PSB/PSE.

Replace the applied

unit.

3-

6

2. Abnormal carriage operation at power on.

START

FX-880 Service Manual

Chapter

3 Troubleshooting

Are all c onnectors connecting the

C229MAIN board and printer

mechanism?

YES

Dose the carriage move

to the home position?

YES

Replace the C229MAIN Board.

NO

NO

Reinsert the connectors correctly.

NO

Is the fault solved?

YES

END

See the troubleshooting for

Printer Mechanism.

NO

Is the fault solved?

Rev. A

YES

END

END

Figure 3-5. Flowchart (2)

3-

Chapter

7

g

j

g

g

g

g

j

y

3. Printing is faulty during self-test, but carriage operation is normal.

START

FX-880 Service Manual

3 Troubleshooting

Is AC input voltage normal?

120V version: 85 - 138V.

230V version: 187 - 276V.

YES

Holding down the LF/FF or

Load/E

printer to start self test printin

Is the vertical

YES

ect switch, turn on the

Is printin

executed?

line ali

Is any dot

missin

YES

ned?

YES

?

NO

NO

NO

NO

.

Perform the Bi-D

ad

ustment.

Is the fault solv ed?

END

Use the correct AC input v ol tage.

No fluctuation from AC v ol ta

permitted.

Are all connectors connec ting the

C229MAIN board and printer

mechanism?

YES

NO

YES

e range is

Reinsert the connectors correctly.

NO

NO

Is the fault solv ed?

YES

END

Rev. A

YES

Verify FFCs are properly inserted

and have continuit

defective, replace t he pri nthead.

Is the fault solv ed?

. If they are not

NO

YES

END

Adjust the Platen Gap.

Replace the C229MAIN

board.

END

Figure 3-6. Flowchart (3)

3-

8

4. Abnormal paper feeding

START

FX-880 Service Manual

Chapter

3 Troubleshooting

Is the paper loaded

correctly?

YES

Is the connector CN5

or CN6 connected

correctly?

YES

Dose the platen knob rotate

smoothly when it is turned

manually at power off?

YES

Replace the

C229MAIN board.

NO

NO

Load the paper

correctly.

Reinsert the connector

CN5 or CN6 correctly.

NO

Is the fault

solved?

YES

END

NO

Refer to the

troubleshooting for

Printer Mechanism.

Rev. A

NO

Replace the

C229MAIN board.

Is the fault

solved?

YES

Is the fault

solved?

NO

YES

Refer to the

troubleshooting of

Printer Mechanism.

END END END

Figure 3-7. Flowchart (4)

3-

9

5. Abnormal control panel operation

START

FX-880 Service Manual

Chapter

3 Troubleshooting

Do the switches

have clicks?

YES

Is the fault

solved?

YES

NO

Replace the Operation Panel.

NO

Replace the C229MAIN board.

NO

Is the fault

solved?

YES

Verify t ha t t he harnes s for the operation

panel is properly inserted and have

continuity . I f it is connected, replac e t he

harness.

END

END

END

Figure 3-8. Flowchart (5)

Rev. A

3-

0

6. Data sent by the host computer is printed incorrectly.

START

Execute the printer self test.

FX-880 Service Manual

Chapter

3 Troubleshooting

Dose the self test print

normally?

YES

Verify the default setting.

Is the interface

cable connected

correctly?

YES

Replace the

C229MAIN

board.

NO

Refer to the other

troubleshooting items.

NO

Replace the interface cable.

NO

Is the fault sol ved?

YES

END

Rev. A

Is the fault sol ved?

YES

END

NO

Increase the setting position of

the paper thickness lever.

Is the fault sol ved?

YES

END

Figure 3-9. Flowchart (6)

NO

Adjust the platen gap.

(Refer to chapter 4.)

3-1

FX-880 Service Manual

Chapter

3 Troubleshooting

3.3 UNIT REPAIRING OF THE POWER SUPPLY BOARD

This section is necessary only for servicers who repair to the component level. Servicers who
perform only board replacement can ignore this section.
The table below lets you troubleshoot problems with the power supply board (C229PSB/PSE). The
table provides various symptoms, likely cases, and checkpoints. Checkpoints include waveforms,
resistance, and other value to be checked to evaluate the operation of each component.

Table 3-6. Repair of the C229PSB/PSE

Condition Cause Checkpoint Solution

Symptom

Fuse F1 is
blown.

Transformer
(T1) is open.

Verify whether the fuse is blown or
not.

Verify the coil of transformer by a
multimeter.

Verify the waveform at drain of Q1.

Replace the
C229PSB/
PSE board.
Replace the
C229PSB/
PSE board.

The printer
dose not
operate at
all.

+35V line is
defective.

Switching
FET (Q1) is
defective.

Q2 or Q3 is
defective.

Replace the
C229PSB/PS
E board.

Figure 3-10. Drain of Q1

Verify the waveform at corrector of
Q2 or Q3.

Replace the
C229PSB/
PSE board.

Rev. A

Figure 3-11. Corrector of Q2/Q3

3-11

2

Symptom

FX-880 Service Manual

Chapter

Table 3-7. Repair of the C229PSB/PSE (continued)

Condition Cause Checkpoint Solution

Verify the waveform at pin 5 or 7 of
PC1.

+35V line is
defective.

PC1 is
defective.

Figure 3-12. Waveform of PC1

3 Troubleshooting

Replace the
C229PSB/
PSE board.

The printer
dose not
operate at
all.

+5V line is
defective.

Regulator IC
(IC51) is
defective.

Verify the waveform at pin 5 of IC51.

Replace the
C229PSB/
PSE board.

Figure 3-13. OSC of IC51

Verify the waveform at pin 9 or 10 of
IC51.

Replace the
C229PSB/
PSE board.

Figure 3-14. Output of IC51

Rev. A

3-1

FX-880 Service Manual

3

Chapter

3 Troubleshooting

3.4 UNIT REPAIRING OF THE MAIN BOARD

This section is necessary only for servicers who repair to the component level. Servicers who
perform only board replacement can ignore this section.
The table below lets you troubleshoot problems with the main board (C229MAIN). The table
provides various symptoms, likely cases, and checkpoints. Checkpoints include waveforms,
resistance, and other value to be checked to evaluate the operation of each component.

Table 3-8. Repair of the C229MAIN

Condition Cause Checkpoint Solution

Symptom

Verify the voltage waveforms for the
+5VDC line (IC1, pin 3) and for the
reset signal (IC1, pin 1) when the
power is on.

The printer
dose not
operate at
all.

The CPU
dose not
operate.

The reset
circuit is not
operational.

Selection
control ROM
is abnormal

5V line

Replace the
C229MAIN
board.

/RESET

Figure 3-15. Reset Signal

Verify the signal at pin 22, IC7 or pin
30, IC6 which changes between
HIGH and LOW.

Replace the
C229MAIN
board.

Figure 3-16. Chip Select Signal for

Program ROM

Rev. A

3-1

4

Symptom

The printer
dose not
operate at
all.

FX-880 Service Manual

Chapter

3 Troubleshooting

Table 3-9. Repair of the C229MAIN (continued)

Condition Cause Checkpoint Solution

Verify the oscillator signal at pin 26
or 27 of the CPU (IC3).

Replace the
The CPU
dose not

The CPU is
defective.

C229MAIN

board.
operate.

The carriage
operates
abnormally.

The carriage
dose not
operate at
all.

IC8 is
defective.

Figure 3-17. Clock Signal of CPU

Verify the CR motor phase control
signals at pin 5, 6, 16,17, and motor
drive signals at pin 1, 8, 11, 18 of
IC8.

Pin 5 of IC8

Pin 1, of IC8

Figure 3-18.

CR Motor Control Signal

Replace the

C229MAIN

board.

Rev. A

3-1

5

Symptom

FX-880 Service Manual

Chapter

3 Troubleshooting

Table 3-10. Repair of the C229MAIN (continued)

Condition Cause Checkpoint Solution

Verify the PF motor phase control
signals at pin 1, 2, 23, 24, and
motor drive signals at pin 3, 6, 18,
21 of IC11.

The paper
feeds
abnormally.

Self test
printing is
abnormal.

The paper
dose not
feed at all.

The self test
printing is
not executed
or a
particular dot
is not
printed.

IC 11 is
defective.

Any
transistor of
Q2 - Q10 is
defective.

Pin 1 of IC11

Pin 3 of IC 8

Figure 3-19.

PF Motor Control Signal

Verify the printhead drive signal at
the corrector and base of Q2 - Q11

BASE of Q5

CORRECTOR of Q5

Replace the
C229MAIN
board.

Replace the
C229MAIN
board.

Figure 3-20.

Pritnhead Drive Signal

Any
transistor
from Q11 to
Q25 is

-

Replace the
C229MAIN
board.

defective.
Data from
the host
computer is
printed
incorrectly.

Rev. A

Data
corruption
occurs when
the interface
is used.

IC2 or CPU

is defective. -

Replace
C229MAIN
board.

3-1

6

3.5 REPAIRING THE PRINTER MECHANISM

FX-880 Service Manual

Chapter

3 Troubleshooting

For detailed procedures for replacing or adjusting matter, refer to Chapter 4,

Assembly

try find other potential causes.

Problem: The CR motor fails to operate.
The CR motor fails to
drive the timing belt
after power on.

Problem: The carriage dose not operate when power on (after carriage has been centered
The CR motor rotates,

but the carriage dose
not move.

The carriage moves to
the left slightly, then
stops.

The carriage moves to
the left or right end,
then stops.
Problem: Self test printing is not executed.
The carriage moves,
but dose not print.

and Chapter 5,

Symptom Cause Checkpoint Solution

prior to power on manually).

adjustments

Table 3-11. Repairing the Printer Mechanism

Foreign substances
are lodged in the
mechanism.
The CR motor is
defective.

The belt drive or
driven pulley is
defective.
The timing belt is
defective.

The carriage
movement is not
smooth.

The HP detector is
defective.

The printhead FFC
common wires are
disconnected.

The printhead is
defective.

. If a problem or symptom occurs, refer to following tables to

Manually move the
timing belt to see if the
motor can rotate freely.
Measure the motor coil
resistance. It should be
about 16 ohms. If the
coil is shorted, also
verify CR motor driver
IC8 on the main board.

Verify the pulleys which
are broken or worn.

Verify the timing belt is
set correctly to the
carriage.
Verify whether the timing
belt is broken or not.
Verify whether the
carriage moves
smoothly when move
manually.

Verify the HP detector
by multi meter.

Verify whether FFC is
set or not to the
printhead or the main
board.
Measure the printhead
coil resistance. It should
be about 8 ohms. If the
printhead is shorted,
also verify the drivers on
the main board.

Disassembly and

Remove the
foreign substance.

Replace the CR
motor (and main
board, if
necessary).

Replace the
pulleys.

Reset the belt to
the carriage.

Replace the belt.
Clean and

lubricate the CR
guide shaft or
frame. Otherwise,
replace the CR
motor.
Replace the HP
detector.

Set the FFC to the
printhead or the
main board
correctly.
Replace the
printhead, (and
drivers , if
necessary).

Rev. A

3-1

FX-880 Service Manual

7

Chapter

Table 3-12. Repairing the Printer Mechanism (continued)

Symptom Cause Checkpoint Solution

Problem: Self test printing is not executed.
A particular dot is
missing.

The printing is too
light, or the print
density is not
uniform.

Problem: Paper feed is abnormal.
Printing is performed
but the paper is not
fed or is fed
uniformly. The PF motor dose

Problem: The ribbon is abnormal.
The ribbon is not
turning.

The ribbon feed
properly only when
the carriage moves
in one direction (i.e.,
it fails to feed when
the carriage moves
in the other
direction).

The printhead is
defective.

The printhead is
defective.

The platen gap is
properly adjusted.

Foreign substances
are lodged in the
paper path.

not drive the
mechanism.
The PF motor is
defective.

The ribbon cartridge is
defective.

Foreign substances
are caught in the
gears.

The planetary gear in
the ribbon drive gears
is defective.

Measure the printhead coil
resistance. It should be
about 8 ohms. If the
printhead is shorted, also
verify the drivers on the
main board.
Verify whether head wire is
born or not.
Verify whether head wire is
born or not.

Set the gap adjustment
lever to the first position,
and check the platen gap.
The correct PG is 0.365 ±

0.015.
Verify the paper path

whether any foreign
substance is put on.
Verify the mechanism
whether any foreign
substance is put on.
Measure the motor coil
resistance. It should be
about 16 ohms. If the motor
is shorted, also verify the
drivers on the main board.

Remove the ribbon
cartridge, verify to rotate its
knob manually, and to see if
the ribbon feeds normally.
Verify whether the RD
ratchet rotates when the
carriage is moved manually
toward left and right.

Move the carriage manually:
verify whether the ribbon
feed gears turns in reverse
and engages the gear.

3 Troubleshooting

Replace the
printhead, (and
drivers , if
necessary).

Replace the
printhead.
Replace the
printhead.

Adjust the platen
gap. Refer to
Chapter 5.

Remove any
foreign
substance.
Remove any
foreign
substance.
Replace the PF
motor, (and
drivers , if
necessary).

Replace the
ribbon cartridge.

Remove any
foreign
substances.
Otherwise,
replace the ribbon
feed mechanism.
Replace the
ribbon feed
mechanism.

Rev. A

3-1

FX-880 Service Manual

8

Chapter

Table 3-13. Repairing the Printer Mechanism (continued)

Symptom Cause Checkpoint Solution

Problem: Paper becomes stained with ink.
Ink stains appear on
printed areas.

Problem: Printing continues after the paper ends or when no paper is loaded.
Printing continues
past the end of the
page.

The ribbon mask is
positioned incorrectly.

The platen gap is not
adjusted correctly.

The PE detector is
defective.

Make sure the ribbon
mask is in the correct
position.
Set the gap adjustment
lever to the first position,
and verify the platen
gap. The correct platen
gap is 0.365±0.015.

Check if the PE detector
is bad.

3 Troubleshooting

Reinstall the ribbon
mask.

Adjust the platen
gap. Refer to the
chapter 5

Adjustment

Replace the PE
detector.

.

Rev. A

3-1

CHAPTER



DISASSEMBLY AND ASSEMBLY

FX-880 Service Manual

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.1 OVERVIEW

This section describes various points to note when disassembling and assembling the printer.
Unless otherwise specified, disassembled units or components can be re-assembled by reversing
the disassembly procedure. Therefore, no assembly procedures are included in this section.
Precautions for any disassembly or assembly procedure are described under the heading

CHECK POINT

“
heading “

ADJUSTEMNTS

4.1.1 Disassembly Precautions

Follow the precautions below when disassembling the printer.

”. Any adjustments required after disassembling the units are described under the

”.

WARNING

CAUTION



Before disassembling, assembling or adjusting the printer,
disconnect the power supply cable from the AC power socket.
Failure to do cause personal injury.



Be careful with the printhead when you handle it, as it may be very
hot just after printing.



Do not touch the heat sink attached to the switching FET (Q1) on the
power supply board, just after power off as it may be very hot.



Never touch the heat sink attaches to the switching FET (Q1) while at
AC power cable is connected to the AC outlet, as it is not electrically
isolated.

To maintain efficient printer operation:



Use only the recommended tools for maintenance work.



Use only the recommended lubrications and adhesives (See Chapter

6.)



Adjust the printer only in the manner described in this manual.

4.1.2 Tools and Instruments

The table below lists the tools and the instruments required for disassembling, assembling or
adjusting the printer. Use only tools that meets these specifications.

Table 4-1 . Tool and Instrument List

Name Specification EPSON Part No.

Phillips Screwdriver No.2 B743800200
Phillips Screwdriver No.1 B743800100
Box Driver 7.0mm Diagonal B741700200
Tweezers
Round-nose pliers
Thickness gage
Soldering iron
E-Ring holder Size: #6 B740800800
Multi-Meter OHM/Voltage/Current
Oscilloscope Min. 50MHz

Note) All tools and instruments listed above are commercially available.

Rev. A






B741000100
B740400100
B776702201
B740200100




4-1

FX-880 Service Manual

2

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.1.3 Service Check After Repair

After completing repair of the product, use the check list shown below, to verify status of repaired
product and all the repair work performed before returning the product to the users. This list can
be as a record of all service work performed with the product.

Table 4-2. Repair Status Check List

Category Component Item to Check Status

Printer
Mechanism

Operation Self-Test Was the self-test printing

Adjustment Platen-Gap Is the gap adjusted correctly?

ROM Version Latest version =  Checked, OK
Packing Ribbon Cartridge Has the ribbon cartridge been

Printhead Are all wires print properly?  Checked, OK

 Not necessary
Carriage
Mechanism

Paper Feed
Mechanism

Paper Path Do all types of paper advance

Ribbon Mask Is the ribbon mask free of

On-line Test Was the on-line printing

Bi-D Alignment Is the Bi-Directional alignment

Attachments Have all relevant attachments

Dose the carriage move
smoothly?

z Noisy
z Any dirt or excessive oil?

Is the CR motor at the normal
temperature? (Not too hot?)
Does paper advance smoothly?

z Noisy?
z Paper is jamming?

Is the PF motor at the normal
temperature? (Not too hot?)

smoothly?
Is the tractor feeding paper
smoothly?
Are all paper paths clear of
obstructions?
Is the plate free of damage?  Checked, OK

damage?
successful?
successful?
(PG = 0.38 ± 0.02mm )
made properly?

removed from the printer?
been packed together with the

printer?

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

 Not necessary

 Checked, OK

 Not necessary

 Checked, OK

 Not necessary

Rev. A

4-

FX-880 Service Manual

3

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.1.4 Abbreviations for Small Parts

The table below lists the abbreviations used in this manual for small parts, such as screws and
washers, etc.

Table 4-3. Abbreviations and Screw Type

Abbreviation Description

CB Screw
CBS Screw
CBB Screw
CBP Screw

CP Screw

CB(O) Screw

Head Body Washer

Top Side

C

ross-

recessed

Bind-head S-tight Outside toothed

C

ross-recessed Bind-head Screw

C

ross-recessed Bind-head S-tight Screw

C

ross-recessed Bind-head B-tight Screw

C

ross-recessed Bind-head P-tight Screw

C

ross-recessed Pan-head Screw

C

ross-recessed Bind-head Screw with Outside toothed

lock washer

Table 4-4. Screw Types and Abbreviations

(assembled)

lock washer

Pan-head B-tight

P-tight

Rev. A

4-

FX-880 Service Manual

4

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2 DISASSEMBLY AND ASSEMBLY

This section provides the disassembly procedures. The basic order for disassembly is shown in
the flowchart below. The exploded diagrams are also provided in the APPENDIX. Refer to them to
see how components are engaged each other if necessary.

Main Compornents Disassembly

START

Pre-disassembly

Procedures

Upper Housing Removal

Printer Mechanism

Removal

Printhead Removal

HP Detector Removal

C229MAIN Board

C229PSB/PSE Board

Platen Removal

ROM Replacemant

Printer Mechanism Disassembly

START

Carriage Assembly

Removal

Removal

Ribbon Drive

Assembly Removal

Removal

Figure 4-1. Disassembly Flowchart

PF Motor RemovalCR Motor Removal

PF Gear Train Removal

Rear Paper Guide

Assembly Removal

PG Detector

Removal

Release Detector

Removal

Front PE Detector

Removal

Rear PE Detector

Removal

Rev. A

4-

FX-880 Service Manual

5

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.1 Printhead Removal

1. Remove the top cover.

2. Remove 2 CBS (M3 × 8) screws attaching the printhead to the carriage assembly.

3. Disconnect the head FFC from the printhead and remove it.

WARNING

$'-8670(17



Before disassembling or assembling the printhead, disconnect the
power supply cable from the AC power socket. Failure to do cause
personal injury.



Be careful with the printer when you handle it, as it may be very hot
just after printing.

After replace the printhead, perform the platen gap adjustment. (Refer
to Chapter 5.)

Printhead

Head FFC

Figure 4-2. Printhead Removal

Rev. A

4-

FX-880 Service Manual

6

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.2 HP (Home Position) Detector Removal

1. Remove the top cover.

2. Release the hook attaching the HP detector to the printer mechanism and remove it.

3. Disconnect the harness of the detector from the detector connector.

H arness

Hook

HP Detector

Figure 4-3. HP Detector Removal

Rev. A

4-

FX-880 Service Manual

7

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.3 Pre-disassembly Procedures

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit.

Paper Eject C over

Tractor U nit

Figure 4-4•DPre-Desassembly

CAUTION

Remove the paper eject cover and the tractor unit by pushing and
releasing the hooks at both sides. When remount them, verify to snap
these hooks on the projecting parts.

Rev. A

4-

FX-880 Service Manual

8

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.4 Upper Housing Removal

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)

2. Remove 2 CBS (M3 × 6) screws and a CBB (4 × 12) screw securing the upper housing to the
lower case.

3. Set the release lever to friction paper feeding.

4. Opening the front side of upper housing a little, disconnect the Panel FFC from the connector
of panel assembly.

5. Opening the front side of upper housing a little, release 2 hooks of panel assembly attaching
to upper housing from front bottom side of upper housing and remove the panel away.

6. Open the upper housing from front side, and remove it away.

Panel FF C

CBS(M 3 x 6)

Panel A ssem bly

CBB(4 x 12)

SHEET,R ELASE,C AP

Upper Housing

CBS(M 3 x 6)

R elease Lever

Low er C ase

Panel FF C

Figure 4-5. Upper Housing Removal

CAUTION



When assembly the upper housing, put the hooks of the upper
housing on the catching holes in rear side of the lower case at first
and close the housing.



Panel assembly is put on the upper housing after upper housing
assembled.



Sheet, Release, Cap is able to be assembled after upper housing
assembly.

Rev. A

4-

9

4.2.5 C229MAIN Board Removal

Chapter

FX-880 Service Manual

4 DISASSEMBLY AND ASSEMBLY

WARNING



Before disassembling, assembling or adjusting the printer,
disconnect the power supply cable from the AC power socket.
Failure to do it cause personal injury.



Do not touch the heat sink attached to the switching FET (Q1) on the
power supply board, just after power off as it may be very hot.



Never touch the heat sink attaches to the switching FET (Q1) while at
AC power cable is connected to the AC outlet, as it is not electrically
isolated.

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)

2. Remove the upper housing. (See Section 4.2.4.)

3. Remove 5 CBS (M3 × 4) screws and 3 CBB (3 × 12) screws securing the shield cover to the
printer mechanism and lower housing and remove the shield cover.

4. Disconnect the harnesses from the connectors CN3, CN4, CN5, CN6, CN7, CN8, CN9,
CN10, CN11 and CN12 on the C229MAIN board.

5. Remove 2 CBS (M3 × 12) screws securing COVER,CONNECTOR,UPPER to the I/F
GROUNDING PLATE.

6. Remove 6 CBB (3 × 12) screws securing C229MAIN Board to the lower case.

7. Remove the GUIDE, I/F BOARD and GROUNDING PLATE,I/F,UPPER

8. Remove 2 CP (M3 × 8) screws securing the I/F GROUNDING PLATE to the C229MAIN board
and remove I/F GROUNDING PLATE.

CAUTION

$'-8670(17



Be careful with the edges of the shield plate, as they are very sharp.



Make sure to match the connectors’ color each other. But, the yellow
harness must be connected to CN10, and the blue harness must be
connected to CN11.



The red line side of the harnesses for CN3, CN8 and CN9 must be set
No.1 pin side.

If replace the C229MAIN Board, perform the Default setting and Bi-d
adjustment to store the new data into the EEPRM on the main board.
(Refer to Chapter 5.)

Rev. A

4-

0

CBS(M 3 x 4)

CBB(3 x 12)

CBB(3 x 12)

I/F G ROUNDING PLATE

Chapter

S h ie ld C o v e r

FX-880 Service Manual

4 DISASSEMBLY AND ASSEMBLY

CBS(M 3 x 4)

G R O U N D IN G P L A T E ,I/F ,U PPER

CBB(3 x 12)

CBB(3 x 12)

C P(M 3 x 8)

G U ID E ,I/F B O A R D

C 229M AIN B oard

ROMC229PSB/PSE

CBS(3 x 12)

COVER,CONNECTOR,UPPER

Printer M echanism

Low er C ase

Figure 4-6. C229MAIN Board Removal

Rev. A

4-1

FX-880 Service Manual

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.6 C229PSB/PSE Board Removal

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)

2. Remove the upper housing. (See Section 4.2.4.)

3. Remove 5 CBS (M3 × 4) screws and 3 CBB (3 × 12) screws securing the shield cover to the
printer mechanism and lower housing and remove the shield cover. (See Section 4.2.5.)

4. Disconnect the harness from the connector CN3 on the C229MAIN board.

5. Disconnect the power cable from the connector CN1 on the C229PSB/PSE Board.

6. Remove 2 CBB (3 × 12) screws securing the C229PSB/PSE Board to the Lower Case and
remove the C229PSB/PSE Board away.

WARNING

C229PSB/PSE Board







Before disassembling, assembling or adjusting the printer,
disconnect the power supply cable from the AC power socket.
Failure to do it cause personal injury.
Do not touch the heat sink attached to the switching FET (Q1) on the
power supply board, just after power off as it may be very hot.
Never touch the heat sink attaches to the switching FET (Q1) while at
AC power cable is connected to the AC outlet, as it is not electrically
isolated.

CN1

CBB(3 x 12)

Low er C ase

Rev. A

C 229M A IN B oard

Figure 4-7. C229PSB/PSE Board Removal

4-11

2

4.2.7 ROM Removal

Chapter

FX-880 Service Manual

4 DISASSEMBLY AND ASSEMBLY

WARNING

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)

2. Remove the upper housing. (See Section 4.2.4.)

3. Remove 5 CBS (M3 × 4) screws and 3 CBB (3 × 12) screws securing the shield cover to the
printer mechanism and lower housing and remove the shield cover. (See Section 4.2.5.)

4. Remove the ROM from the C229MAIN Board.



Before disassembling, assembling or adjusting the printer,
disconnect the power supply cable from the AC power socket.
Failure to do it cause personal injury.



Do not touch the heat sink attached to the switching FET (Q1) on the
power supply board, just after power off as it may be very hot.



Never touch the heat sink attaches to the switching FET (Q1) while at
AC power cable is connected to the AC outlet, as it is not electrically
isolated.

Rev. A

4-1

FX-880 Service Manual

3

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.8 Platen Removal

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)

2. Remove the upper housing. (See Section 4.2.4.)

3. Remove 2 CBS (M3 × 8) screws securing the COVER,PLATEN.

4. Rotating the teeth of the PLATEN SHAFT HOLDERs toward front, disengage them from the
Left/Right Side Frames.

5. Slide the PLATEN toward right a little and take it off upward.

$'-8670(17

PLATEN SH AFT HOLDER

Left S ide Fram e

If replace the plate, perform the platen gap adjustment. (Refer to
Chapter 5.)

CBS(M 3 x 8)

C over P laten

PLATEN

PLATEN SH AFT HOLDER

R ight Side Fram e

Figure 4-8. Platen Removal

Rev. A

4-1

FX-880 Service Manual

4

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.9 Printer Mechanism Removal

1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)

2. Remove the upper housing. (See Section 4.2.4.)

3. Remove 5 CBS (M3 × 4) screws and 3 CBB (3 × 12) screws securing the shield cover to the
printer mechanism and lower housing and remove the shield cover. (See Figure 4-6. )

4. Disconnect the harnesses from the connectors CN3, CN4, CN5, CN6, CN7, CN8, CN9, CN10
and CN11 on the C229MAIN board.

5. Remove 2 CBB (4 × 12) screws securing the front frame to the lower housing, and remove
the front frame.

6. Remove 4 mechanism fixing screws, and remove the printer mechanism upward.

$'-8670(17

M echanism Fixing S crew

Printer M echansim

Once remove the printer mechanism, verify the platen gap and the Bi-D
adjustment.

Front Fram e

CBB(4 x 12)

M echanism Fixing S crew

Low er H ousing

Figure 4-9. Printer Mechanism Removal

Rev. A

4-1

FX-880 Service Manual

5

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10 Printer Mechanism Disassembly

4.2.10.1 CR Motor Removal

1. Release the tension spring.

2. Disengage the TIMING BELT from the CR motor pinion and hang it on the hook.

3. Remove 2 SHAFT,MOUNT,CR screws securing the CR motor assembly to the
FRAME,SUB,RIGHT, and remove the CR motor.

4. Remove 2 CB (M3 × 6) screws securing the CR motor to the motor bracket, and remove the
CR motor.

CR MotorSHAFT,M O UNT,C R

CR Motor Bracket

Tension Spring

C B (M 3 x 6)

FRAM E,SU B,RIGHT

$'-8670(17

CHECK POINT

9

Hook

Tim ig Belt

Figure 4-10. PF Motor Removal

If replace the CR motor or TIMING BELT, perform the Bi-d adjustment.
(See Chapter 5.)

Position the CR motor assembly on the CR motor bracket correctly as
shown below;

CR Motor Bracket

CR Motor

M o to r H a rn e s s

Figure 4-11. Positioning the CR Motor on the CR Motor Bracket

Rev. A

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FX-880 Service Manual

6

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.2 PF Motor Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Release the motor harness from the printer mechanism securing part.

3. Set the release lever to the vertical (Rear Push tractor) or forward (Push tractor) position.

4. Remove 2 CBS (M3 × 8) screws securing the PF motor to the FRAME,SUB,RIGHT, and
remove the PF motor.

CAUTION

In case of the release lever in the Friction feeding position, PF motor is
not released.

R elease Lever Position

P F M o to r

CBS(M 3 x 8)

FRAM E,SUB,RIG HT

M o to r H a rn e s s

Figure 4-12. PF Motor Removal

Rev. A

4-1

FX-880 Service Manual

7

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.3 PF Gear Train Disassembly

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove the CR motor. (See Section 4.2.10.1.)

3. Remove the PF motor. (See Section 4.2.10.2)

4. Remove the head FFC from the FRAME,SUB,RIGHT of the printer mechanism.

5. Remove the 2 CBS (M3 × 8) screws securing the FRAME,SUB,RIGHT, and remove the
FRAME,SUB,RIGHT.

SPUR G EAR,21

CO M PRESSIO N SPRING 200

SPUR G EAR,27

SPUR G EAR,34.5

SPUR G EAR,34.5

LEVER , RELEASE

IN T E R M IT T E N T G E A R

FRAM E,SUB,RIG H T

CHECK POINT

9

Plain W asher

SPUR G EAR,34.5



Verify to properly mesh the release lever with the teeth of
INTERMITTEN GEAR as shown below;

SPUR G EAR,34

CAM,CLUTCH,TRACTOR

Figure 4-13. PF Gear Train Disassembly

CBS(3 x 8)

Head FFC

LEVER,RELEASE

IN TE R M ITTEN T G EAR

Figure 4-14.

Engagement between Release Lever and INTERMITTENT GEAR



Assembly to engage the hole of CAM,CLUTCH,TRACTOR with the
ejection part of the release lever.

Rev. A

4-1

FX-880 Service Manual

8

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.4 PG (Platen Gap) Detector Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove 2 clips of PG detector attached to the LEFT FRAME of the printer mechanism and
remove the detector.

C lip

P G D e te c to r

LEFT FR AM E

Figure 4-15. PG Detector Removal

4.2.10.5 Release Detector Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove 2 clips of Release detector attached to the FRAME,SUB,RIGHT of the printer
mechanism, and remove the detector.

R elease D etector

C lip s

FRAM E,SUB,RIG HT

Figure 4-16. Release Detector Removal

Rev. A

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FX-880 Service Manual

9

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.6 Front PE (Paper End) Detector Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove 2 clips of the front PE detector attached to the REAR PAPER GUIDE ASSEMBLY,
and remove the detector.

3. Disconnect the harness from the detector.

REAR PAPER G UIDE ASSM EBLY

C lip

Front P E D etector

Figure 4-17. Front PE Detector Removal

4.2.10.7 Rear PE Detector Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Hold the printer mechanism horizontally.

3. Release 2 clips of REAR PAPER GUIDE ASSEMBLY attached Rear PE detector.(①)

4. Release 2 notches of the REAR PAPER GUIDE ASSEMBLY attaching the detector to it, slide
the detector toward rear a little, and then remove the detector downward. (②)

5. Disconnect the harness from the detector.

FRAM E,REAR

REAR PAPER G U ID E ASSEM BLY

C lip s

Rear PE Detector

Figure 4-18. Rear PE Detector Removal

Rev. A

4-1

FX-880 Service Manual

0

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.8 Carriage Assembly Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove the Head FFC. (See Section 4.2.1.)

3. Remove the Platen. (See Section 4.2.8.)

4. Remove the hexagon nut and the washer securing the LEVER,G,ADJUST to the
SHAFT,CR,GUIDE, and remove the lever.

5. Remove the BUSHING,PARALLEL,ADJUST to turn around the SHAFT,CR,GUIDE.

6. Disengage the TIMING BELT from the CR motor. (See Section 4.2.10.1.)

7. Move the carriage assembly to the far right end, and remove it from the rack of the
FRAME,FRONT with the SHAFT,CR,GUIDE.

8. Release the TIMING BELT from the 2 clips at the bottom of the carriage assembly.

Washer

H exagon N ut

LEVER,G ,ADJUST(R elease Lever)

C arriage A ssem bly

BUSH ING ,PARALLEL,ADJUST

OIL PAD

$'-8670(17

TIM ING BELT

FRAM E,FRO NT

SHAFT,CR ,G UIDE

Figure 4-19. Carriage Assembly Removal

If remove the carriage assembly, perform the Platen Gap adjustment
and Bi-d adjustment. (See Chapter 5.)

CHECK POINT

9

When attaching the TIMING BELT to the carriage assembly, secure the
TIMING BELT using the left and right clips of the carriage assembly as
shown below. And verify there is no slack in the TIMING BELT.

C lip

TIM IN G BELT

NG

OK

Figure 4-20. Attaching the TIMING BELT

Rev. A

4-2

FX-880 Service Manual

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.9 Rear Paper Guide Assembly Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove the Platen. (See Section 4.2.8.)

3. Remove the hexagon nut and the washer securing the LEVER,G,ADJUST to the
SHAFT,CR,GUIDE, and remove the lever. (See Section 4.2.10.8.)

4. Remove the BUSHING,PARALLEL,ADJUST to turn around the SHAFT,CR,GUIDE. (See
Section 4.2.10.8.)

5. Remove the PG Detector. (See Section 4.2.10.4.)

6. Remove the harness of HP Detector.

7. Remove 4 CBS (M3 × 8) screws securing the LEFT FRAME of the printer mechanism, and
remove the LEFT FRAME.

8. Remove the Head FFC from the FRAME,REAR of the PRINTER MECHANISM.

9. Remove 2 CBS (M3 × 8) screws securing the FRAME,REAR to the RIGHT FRAME, and
remove the REAR PAPER GUIDE ASSEMBLY.

10. Push the clip on the bottom of the REAR PAPER GUIDE ASSEMBLY, and slide out the
REAR PAPER GUIDE ASSEMBLY from the FRAME REAR.

CBS(M 3 x 8)

LEFT FR A M E

REAR PAPERG UIDE ASSEM BLY

FRAM E,R EAR

Figure 4-21. REAR PAPER GUIDE ASSEMBLY Removal

C lip

CBS(M 3 x 8)

FRAM E,R EAR

Rev. A

4-21

FX-880 Service Manual

2

Chapter

4 DISASSEMBLY AND ASSEMBLY

4.2.10.10 Ribbon Drive (RD) Assembly Removal

1. Remove the printer mechanism. (See Section 4.2.9.)

2. Remove the Platen. (See Section 4.2.8.)

3. Remove the hexagon nut and the washer securing the LEVER,G,ADJUST to the
SHAFT,CR,GUIDE, and remove the lever.

4. Remove the BUSHING,PARALLEL,ADJUST to turn around the SHAFT,CR,GUIDE. (See
Section 4.2.10.8.)

5. Remove the harness of PG Detector. (See Section 4.2.10.4.)

6. Remove the harness of HP Detector from the LEFT FRAME.

7. Remove 4 CBS (M3 × 8) screws securing the LEFT FRAME of the printer mechanism, and
remove the LEFT FRAME.

8. Remove the CBC (M3 × 8) screw and the CBB (3 × 8) screw securing the ribbon drive
assembly.

9. Release the ribbon drive assembly engaging with the ROLLER ASSEMBLY,DRIVE, and
remove the ribbon drive assembly.

CBC (M 3 x 8)

R ibbon D rive Assem bly

RO LLER ASSEM BLY,DRIVE

Figure 4-22. RD Assembly Removal

CBB (3 x 8)

FRAM E, FRONT

Rev. A

4-2

ADJUSTMENT

&+$37(5



FX-880 Service Manual

Chapter 5 Adjustment

5.1 ADJUSTMENT OVERVIEW

5.1.1 Required Adjustment

This section describes what adjustments are required after any part is removed or replaced. The
following table shows the relationship between the repair item and the adjustment.

Table 5-1. Required Adjustment

Required Adjustment Platen Gap Factory Setting Bi-D

Adjustment

Printhead Removal or
Replacement
Printer Mechanism Replacement --- --­Printer Mechanism Removal
Main Boar Replacement --­Timing Belt Replacement
Platen Replacement
Carriage Assembly
Replacement
CR Motor Replacement --- --­EEPROM Clear --- ---

Note 1) “" means adjustment is required.
Note 2) “---“ means adjustment is not required.









---

---

 

---

--- ---

---













5.1.2 Adjustment Tools

The following table shows the tools required for each adjustment.

Table 5-2. Required Adjustment Tool

Adjustment Required Tool

Platen Gap Thickness gauge
Factory Setting Setting a diskette
Bi-D Adjustment Setting a diskette

Rev. A

5-1

FX-880 Service Manual

2

Chapter 5 Adjustment

5.2 ADJUSTMENT AND RESETTING THE PRINTER

5.2.1 Platen Gap Adjustment

If the SHAFT,CR,GUIDE or BUSHING,PARALLEL,ADJUST is rotated or reassembled, or printing
is too faint or stained, the Plate Gap adjustment must be performed in the following order:

1. Remove the Upper housing. (See Section 4.2.4.)

2. Remove the printhead from the carriage assembly. (See Section 4.2.1.)

3. Using tweezers, remove the ribbon mask from the carriage assembly.

Ribbon Mask

Carriage Assembly

Figure 5-1. Ribbon Mask Removal

4. Attach the printhead onto the carriage assembly.

5. Set the paper adjustment lever to the position "0" (the second step position) from rear.

6. Rotate the SHAFT,CR,GUIDE so that the large countersink on the left edge of the shaft
comes upward.

BUSHING,PARALLEISM,ADJUST

Carriage Assembly

Large countersink

SHAFT,CR,GUIDE

Small countersink

Figure 5-2. SHAFT,CR,GUIDE Setting

7. Move the carriage assembly to the right edge.

8. Loosen a little bit the hexagon nut securing the PG adjust lever and the SHAFT,CR,GUIDE.

9. Set the thickness gauge of 0.38 mm and insert it between the Printhead and PLATEN.

10. Insert the screwdrivers into the countersink located on the left side of the SHAFT,CR,GUIDE
and rotate the screwdriver until the PLATEN and Printhead touch each other lightly.

Rev. A

5-

FX-880 Service Manual

3

Chapter 5 Adjustment

11. Move the carriage assembly to the left edge.

12. Set the thickness gauge of 0.38 mm and insert it between the Printhead and PLATEN.

13. Insert the screwdrivers into the countersink and rotate the screwdriver until the PLATEN and
Printhead touch each other lightly.

14. Continue performing adjustment step 10 to 13, rotating the
BUSHING,PARALLELISM,ADJUST until the parallelism gap of right and left becomes under

0.02 mm.

15. When the parallelism gap of right and left becomes less than 0.02 mm, move the carriage
assembly to the center of the printable area.

16. Insert the thickness gauge between the printhead and the PLATEN, and rotate the
SHAFT,CR,GUIDE so that the platen gap becomes 0.365 ± 0.015 mm.

0.365+/-0.015

PLATEN

Figure 5-3. Platen Gap

17. When the adjustment is complete, tighten the hexagon nut and the washer securing the
adjust lever.

18. Remove the printhead once, and install the ribbon mask.

19. Attach the printhead back onto the carriage assembly.

CHECK POINT

9

Do not rotate the PLATEN during the adjustment.

P rinthead

Rev. A

5-

FX-880 Service Manual

4

Chapter 5 Adjustment

5.2.2 Factory Setting

The factory settings of the printer for each destination are installed in the EEPROM on the main
board. Therefore, If you have replaced the main board, you must re-install them again by the
adjustment program. This section describes how to install the factory settings:

1. Connect the printer and the host DOS/V computer with a parallel interface cable.

2. Set the 10 inch width continuous paper to the printer.

3. Run the adjustment program in the host computer.

4. The printhead wire select menu appears. Move the cursor using “ ↑ “ or ” ↓" key to select

“ 9 pins” from the list and press “

Program : xxxxx Setting:

[ Printer setting ]
>(1) 9 pins
(2) 24 pins

5. Then the market setting menu appears. Referring to the market list table, move the cursor

using “↑" or “↓" key to select your market from the list and press “
choice to the other market after selection, you may press “
menu appears again. An example (for EAI) is shown below:

Return”

VR 0 = x VR 1 = x VR 2 = x

key.

** **

ESC

” key only. The market setting

Return

” key. To change the

Program : xxxxx Setting:
9 pins VR 0 = x VR 1 = x VR 2 = x

** **
[ Setting File ]
(1) DEFSTD (6) ITALIC
>(2) USASTD
(3) EURSTD
(4) NLSP
(5) RUSSIAN

Table 5-3. Market List

Destination Code Destination Code

EAI, EAI (Latin) USASTD EDG (NLSP) NLSP
EURO, EDG, EUL, EUL
(SCANDINAVIA), EFS,
EIS, EIB

6. The process selection menu appears. Move the cursor using “↑" or “↓" key to select “
and press “

Return

” key.

Program : xxxxx Setting:
9 pins VR 0 = x VR 1 = x VR 2 = x

[ Process select ]
>(1) In line
(2) Out-Going

EURSTD EUL (MIDDLE EAST),

EAL, ESP, EHK

** **

DEFSTD

In line

”

Rev. A

5-

FX-880 Service Manual

5

Chapter 5 Adjustment

7. The carriage width select menu appears. Move the cursor using “↑” or “↓” key to select “(1) 80
column” and press “Return” key.

Program : xxxxx Setting:
9 pins VR 0 = x VR 1 = x VR 2 = x

** In line**
[ Carriage Width ]
>(1) 80 column
(2) 106 column
(3) 136 column

8. The main menu appears. Move the cursor using “↑” or “↓” key to select “(2) FF paper” from
the list and press “Return” key. The test pattern printing starts.

Program : xxxxx Setting:
9 pins VR 0 = x VR 1 = x VR 2 = x

** In line**
[ Main Menu ]
(1) Bi-D Adjust (6) Envelope
>(2)FF paper (7) – SUB MENU

(3) ---- N/A ----

9. After the test pattern is printed out, turn off the printer once to install the factory setting into
the EEPROM.

10. Press “ESC” key several times to quite the program.

CAUTION



As this adjustment program is just same as the check program in the
factory and includes many other check items which are not needed
for service, you should not performed any items which are not
described in this manual. Otherwise, the printer functions are not
guaranteed.



The factory setting value is not installed into the EEPROM without
this FF paper printing.

Rev. A

5-

FX-880 Service Manual

6

Chapter 5 Adjustment

5.2.3 Bi-D Adjustment

Bi-D adjustment can be made either through the panel operation or with the adjustment program.
This section describes Bi-D adjustment performed with the following program:

1. Connect the printer and the PC by the parallel interface cable.

2. Set the 10 inch width continuous paper to the printer.

3. Run the adjustment program in the host computer.

4. Select the printhead wire. (Refer to 5.2.2.)

5. Select the market setting. (Refer to 5.2.2.)

6. Select the carriage width. (Refer to 5.2.2.)

7. The main menu appears. Move the cursor using “↑” or “↓” key to select “
the list and press “

Return

” key. The test pattern printing starts.

Program : xxxxx Setting:
9 pins VR 0 = x VR 1 = x VR 2 = x

** In line**
[ Main Menu ]
>(1) Bi-D Adjust (6) Envelope
(2)FF paper (7) – SUB MENU

(3) ---- N/A ----

(1) Bi-D Adjust

” from

8. Then the Bi-D adjustment menu appears. Move the cursor using “↑" or “↓" key to select Bi-D
printing mode from the three printing modes and the “←" or “→" key to change the setting
value.

< Bi-D Adjustment >

> Mode 0 = x
Mode 1 = x
Mode 4 = x

Cancel Print Speed Value Write Default
[ESC] [SPACE] [↑ ↓][←→] [RET] [HOME]

9. Press “
value shown below are printed:

Space”

key, and the four-line Bi-D pattern for the current setting print mode and the

a

H

H

Figure 5-4. Bi-D Adjustment Pattern

Rev. A

5-

FX-880 Service Manual

7

Chapter 5 Adjustment

10. Repeat Step 8 and Step 9 to align the lines continuously by making “a” as specified below:

All mode : Less than 0.05 mm (at the center of the column)

Mode 0 : Less than 0.3 mm (at left and right sides of the column)
Mode 1 : Less than 0.2 mm (at left and right sides of the column)
Mode 4 : Less than 0.05 mm (at left and right sides of the column)

11. Press “Return” key to fix the adjustment value in each mode.

12. Turn off the printer once to install the Bi-D setting into the EEPROM.

13. Press “ESC” key for several times to quite the program.

CAUTION



As this adjustment program is just same as the check program in the
factory and includes many other check items which are not needed
for service, you should not performed any items which are not
described in this manual. Otherwise, the printer functions are not
guaranteed.



The Bi-D adjustment value is not installed into the EEPROM without
power off.

Rev. A

5-

MAINTENANCE

&+$37(5

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FX-880 Service Manual

Chapter

6 Maintenance

6.1 PREVENTIVE MAINTENANCE

Preventive maintenance is important to keep the printer in the best condition and to prevent
troubles in advance. Use the denatured alcohol to clean the exterior case and use the vacuum
cleaner if necessary, to remove dust and paper debris in the printer inside.

WARNING



Disconnect the printer from the AC socket before performing
maintenance.

CAUTION



Do not use thinner, trichloroethylene, or ketone-based solvents on
the plastic components of the printer.



Never use the oil and grease other than those specified in this
manual, and using different type of lubrication can damage the
printer and the components.

The influence that oil and grease give is great especially in low temperature. Therefore, EPSON
has been tested and analyzed various oil and grease extensively and chooses the best one for
that print.

Table 6-1. Lubrication

Oil O-2 40 cc EPSON B710200001
Grease G-26 40 g EPSON B702600001

Ref.

No.

Type

1 2 holes for the SPUR GEARs,34.5 G-26 (5mg)
2 The contact hole of the left side frame with ROLLER,PF,DRIVE G-26 (5mg)
3 The contact surface of left side frame with the gap adjustment

lever.

4 Oil Pad O-2 (0.6 ml)
5 The contact surface for the gear and the shaft in RD ASSEMBLY G-26 (3mg)
6 3 shafts and a hole on HOUSING,RD G-26 (3mg)
7 The contact surfaces for the gears in RD ASSEMBLY G-26 (3mg)
8 6 contact points for the release shaft and ROLLER ASSEMBLY,

PF

Name Quantity Available Part No.

Table 6-2. Lubrication Points

Lubrication Point Lubricant

G-26

(3mg for each

slot)

G-26 (5mg)

Note: Lubrication must be applied during the reassembly process.

Rev. A

6-1

2

6.2 LUBRICATION

FX-880 Service Manual

Chapter

6 Maintenance

T ra c to r C lu tc h C a m

Spur G ears (34.5)

: L u b ric a tio n P o in t R e f. N o .(1 )

Figure 6-1. Lubrication Point (1)

G ap Adjustm ent Lever

Lubricate all these slots.

Platen G ap Adjustm ent S lot

: L u b ric a tio n P o in t R e f. N o .(3 )

: L u b ric a tio n P o in t R e f. N o .(2 )

Figure 6-2. Lubricating Point (2) and (3)

Rev. A

6-

3

: L u b ric a tio n P o in t R e f. N o . 4

Figure 6-3. Lubricating Point (4)

FX-880 Service Manual

Chapter

6 Maintenance

: L u b ric a tio n P o in t R e f. N o .(5 )

: L u b ric a tio n P o in t R e f. N o .(6 )

: L u b ric a tio n P o in t R e f. N o .(7 )

Figure 6-4. Lubricating Points (5), (6) and (7)

R elease Shaft

: Lubricating Point (8)

Figure 6-5. Lubricating Point (8)

Rev. A

6-

APPENDIX

&+$37(5



7.1 CONNECTOR SUMMARY

The primary components are connected as shown below;

FX-880 Service Manual

Appendix

AC

C229PSB/PSE
Board

CN1 CN2

C229MAIN Board

CN3

CN1Parallel I/F

CN2Type-B I/F

CN12

Panel

Printer Mechanism
M-3J10

CN7

CN11

CN9 CR Motor

CN8 PF Motor

CN6 Rear PE Detector

CN5

CN4

Printhead

PG Detector

Release DetectorCN10

Front PE Detector

HP Detector

Figure 7-1. Cable Connections

Table 7-1. Connector Summary

Board Connector

Pin Description

No.

C229MAIN Board CN1 36 Parallel I/F

CN2 36 Type-B I/F (Option)
CN3 10 DC input, Power On/Off
CN4 2 HP Detector
CN5 3 Rear PE Detector
CN6 2 Front PE Detector
CN7 16 Printhead, Thermistor
CN8 4 PF Motor

CN9 5 CR Motor
CN10 2 Release Detector
CN11 2 PG Detector
CN12 12 Panel

C229PSB/PSE Board CN1 2 AC line input

CN2 10 DC output

Rev. A

7-1

FX-880 Service Manual

2

Appendix

Table 7-2. Connector Pin Assignment - CN1

Pin No. I/O Signal Name Function

1 I /STROBE Strobe pulse. Input data is latched at falling edge of the

signal.

2 - 9 I DATA1 - DATA8 Parallel input data to the printer

10 O /ACKNLG This pulse indicates that the printer has received data

and turned into ready to accept next one.

11 O BUSY When this signal is HIGH, the printer is not ready to

accept data.

12 O PE When this signal is HIGH, the printer is in a state of

paper-out error
13 O SLCT This signal is always HIGH when the printer is power on.
14 I /AFXT Not used.
15
16
17
18 O Logic H

19 - 30

31 I /INIT This signal initializes the printer.
32 O /ERROR This signal is output when the printer is in error.
33
34
35 O +5V
36 O /SLIN This signal is always HIGH when the printer is power on.










NC Not connected.

GND Signal ground

Chassis Chassis ground

This line is pulled up to +5V through 3.9 kΩ.

GND Signal ground

GND Signal ground

NC Not connected.

This line is pulled up to +5V through 1.0 kΩ.

Rev. A

7-

3

Table 7-3. Connector Pin Assignment - CN2

Pin No. I/O Signal Name Function

1 - 6

7 O TXD Transmit data
8 O /READY Ready to receive data

9 I RXD Receive data
10
11 O /RST Reset
12 O INH Inhibit
13 I /CMREQ Command request
14 I /WRRDY Write ready
15 I /RDRDY Read request
16 O /W R Write
17 O /RD Read
18 O /CS chip select

19 - 24

25 O A3 Address bus bit 3
26 O A2 Address bus bit 2
27 O A1 Address bus bit 1
28 O A0 Address bus bit 0
29 I/O D7 Data bus bit 7
30 I/O D6 Data bus bit 6
31 I/O D5 Data bus bit 5
32 I/O D4 Data bus bit 4
33 I/O D3 Data bus bit 3
34 I/O D2 Data bus bit 2
35 I/O D1 Data bus bit 1
36 I/O D0 Data bus bit 0







+5 +5 V

NC Not connected.

GND Ground

FX-880 Service Manual

Appendix

Table 7-4. Connector Pin Assignment - CN3

Pin No. I/O Signal Name Function

1 O PSC

2 I PWDN
3 - 4
5 - 6

7

8

9 - 10

Pin No. I/O Signal Name Function

1 I HP HP Detector signal
2









+5V +5V
GND Ground
+35V +35V
+35V +35V

GP Ground

Table 7-5. Connector Pin Assignment - CN4

GND Ground

Rev. A

7-

4

Table 7-6. Connector Pin Assignment - CN5

Pin No. I/O Signal Name Function

1
2 I PE Rear PE Detector signal
3

Pin No. I/O Signal Name Function

1 I PE Front PE Detector signal
2

Pin No. I/O Signal Name Function

1
2 I HTMP Head temperature signal
3 O HEAD3 #3 Head Data
4 O HEAD1 #1 Head Data
5 O HEAD5 #5 Head Data
6 O C5 #3, 7 Common
7 O HEAD7 #7 Head Data
8 O C4 #5,9 Common

9 O HEAD9 #9 Head Data
10 O HEAD8 #8 Head Data
11 O HEAD4 #4 Head Data
12 O C3 #3 Common
13 O C2 #8 Common
14 O HEAD6 #8 Head Data
15 O C1 #1,4 Common
16 O HEAD2 #2 Head Data









+5V +5V

GND Ground

Table 7-7. Connector Pin Assignment - CN6

GND Ground

Table 7-8. Connector Pin Assignment - CN7

+5V +5V

FX-880 Service Manual

Appendix

Rev. A

Table 7-9. Connector Pin Assignment - CN8

Pin No. I/O Signal Name Function

1 O PFA PF Motor phase A

2 O PF-A PF Motor phase /A

3 O PFB PF Motor phase B

4 O PF-B PF Motor phase /B

Table 7-10. Connector Pin Assignment - CN9

Pin No. I/O Signal Name Function

1 O CRA CR Motor phase A

2 O CR-A CR Motor phase /A

3 O CRB CR Motor phase B

4 O CR-B CR Motor phase /B

5



+35V Common

7-

5

Table 7-11. Connector Pin Assignment - CN10

Pin No. I/O Signal Name Function

1 I RELEASE Release Detector signal

2

Pin No. I/O Signal Name Function

1 I PG1 PG Detector signal

2

Pin No. I/O Signal Name Function

1

2 O POUTL Paper Out LED

3 O PAUSE Pause LED

4 O TOFFL Tear Off/Bin LED

5 O FONT2L Font LED

6 O FONT1L Font LED

7 I FONTSW Font Switch

8 I LFFFSW FF/LF Switch

9 I LDEJSW Load/Eject Switch
10 I PAUSSW Pause Switch
11 I PSC Power Switch Control signal
12



Table 7-12. Connector Pin Assignment - CN11



Table 7-13. Connector Pin Assignment - CN12





GND Ground

GND Ground

+5V +5V

GND Ground

FX-880 Service Manual

Appendix

Rev. A

7-

6

7.2 COMPONENT LAYOUT

FX-880 Service Manual

Appendix

Figure 7-2. C229MAIN Board Component Layout

Rev. A

7-

FX-880 Service Manual

7

Appendix

Figure 7-3. C229PSB Board Component Layout

Figure 7-4. C229PSE Board Component Layout

Rev. A

7-

8

Figure 7-5. C229PNL Board Component Layout

FX-880 Service Manual

Appendix

Rev. A

7-

9

7.3 EXPLODED DIAGRAM

FX-880 Service Manual

Appendix

109

104

125

125

125

113

125

125

106

105

123

126

127

133

127

135

119

132

102

127

127

129

127

117

330

127

127

138

122

126

123

200

110

137

128

115

373

400

111

400

112

112

116

541

140

118

126

126

140

126

500

120

140

606

450

101

100

EXPLODED DIAGRAM FOR FX-880(1)

101

107

108

140

Figure 7-6. Exploded Diagram (1)

Rev. A

7-

FX-880 Service Manual

0

Appendix

527

575

530

533

621

622

588

620

525

531

528

535

532

535

535

568

534

578

570

526

602

594

619

598

572

616

617

623

557

501

597

601

595

607

559

565

590

593

561

505

123

556

503

618

562

581

610

613

601

591

607

595

587

599

596

505

613

609

550

543

610

529

524

592

608

610

551

549

547

610

610

650

536

521

524

573

585

610

589

606

584

583

505

614

619

571

610

582

560

563

523

551

610

510

502

565

564

558

522

548

505

610

Figure 7-7. Exploded Diagram (2)

569

586

546

600

576

542

600

123

579

615

EXPLODED DIAGRAM FOR FX-880(2)

545

552

586

123

577

604

544

552

603

504

Rev. A

7-1

7.4 DIMENSION AND WEIGHT

FX-880 Service Manual

Appendix

415

Figure 7-8. Case Outline Drawing

350

154

Rev. A

7-11

FX-880 Service Manual

2

7.5 CIRCUIT DIAGRAM

For the circuit diagram of the following circuit boards, refer to the following pages.

C229PNL BOARD
C229MAIN BOARD
C229PSB/PSE BOARD

Appendix

Rev. A

7-1