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EPSON FX-880
®
4008484
NOTICE
rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or All 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. effort have been made to ensure the accuracy of the contents of this manual. However, All 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
Signals a precaution which, if ignored, could result 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.
WARNING
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER 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 THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE. 3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. 4. IN ORDER TO PROTECT SENSITIVE 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. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6.
PRODUCT DESCRIPTIONS OPERATING PRINCIPLES TROUBLESHOOTING DISASSEMBLY AND ASSEMBLY ADJUSTMENTS MAINTENANCE
Provides a general overview and specifications of the product.
Describes the theory of electrical and mechanical operations of the product.
Provides the step-by-step procedures for troubleshooting.
Describes the step-by-step procedures for disassembling and assembling the product.
Provides Epson-approved methods for adjustment.
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. A Date 1997/09/30 Page(s) All First release Contents
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
1
PRODUCT SPECIFICATION
FX-880 Service Manual Chapter 1 Product Description
1.1 SPECIFICATION
The FX-880 is a small hoot, 9 pins serial impact dot matrix printer. The main specification 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 High speed draft Draft NLQ Bit image Horizontal density 90 120 240 60, 72, 80, 90 or 120 120 or 240 Vertical density 72 72 144 72 72 Adjacent dot print No No No Yes No
PRINTING SPEED Table 1-2. Printing Speed (cps) Printing mode Character pitch Printable column Printing speed
Normal Copy 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 printer stops printing once and then starts to print rest data on that line again more slowly than before. l When the head temperature rises to the upper limit, the printer stops printing once. If the head temperature falls down to the normal level, it begins to print again more slowly than before. FEEDING METHOD Friction feed Push tractor feed Push & Pull tractor feed Pull tractor feed FEED SPEED Normal mode Copy mode
Front, Rear Front, Rear Front, Rear Front, Rear, Bottom
62 ms 0.127MPS ( 5.0 IPS) 83 ms 0.078MPS (3.1 IPS)
1/6 inch feed continuos feeding 1/6 inch feeding 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 Width Length Thickness Weight Quality Front entry Rear entry 148 ~ 257mm ( 5.8 ~ 10.1") 182 ~ 364mm ( 7.2 ~ 14.3" ) 92 ~ 364mm ( 3.6 ~ 14.3") 0.065 ~ 0.14mm ( 0.0025~ 0.0055") 2 52 ~ 90g/m (14 ~ 24 lb) * Plain paper, Reclaimed paper , not curled, not folded, not crumpled Table 1-4. Cut Sheet ( Multi-Part ) Insertion Width Length Copies Total thickness Weight Quality Jointing Front entry 182 ~ 257mm ( 7.2 ~ 10.1" ) 182 ~ 364mm ( 7.2 ~ 14.3" ) 1(original) + 5 0.12 ~ 0.46mm ( 0.0047 ~ 0.018" ) 2 40 ~ 58g/m ( 12 ~ 15 lb) Plain paper, Reclaimed paper, not curled, not folded, not crumpled Line glue at the top or one side of form Table 1-5. Envelope Insertion Envelope Width Length Total thickness Rear entry only No.6 No.10 165mm ( 6.5" ) 241mm ( 9.5" ) 92mm ( 3.6" ) 105mm ( 4.1" ) 0.16 ~ 0.52mm ( 0.0063 ~ 0.020" ) The difference of thickness at the printable area is within 0.25mm ( 0.0098" ) 45 ~ 90g/m2 ( 12 ~ 24 lb ) BOND paper, plain paper, air mail, no glue at a flap, not curled, not folded, not crumpled
Weight Quality
Table 1-6 Continuous Paper ( Single Sheet and Multi-Part ) Insertion Width Length Copies Total thickness Weight Weight ( multi part) Quality Jointing Front entry Rear entry Bottom entry 101.6 ~ 254mm ( 4 ~ 10" ) 101.6 ~ 558.8mm ( 4 22" ) 1(original) + 5 0.065 ~0.46mm ( 0.0025 ~ 0.018" ) 52 ~ 82g/m2 ( 14 ~ 22 lb ) 40 ~ 58g/m2 ( 12 ~ 15 lb ) Plain paper, Reclaimed paper, carbon less multi part paper Point glue or both sides paper staple
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Table 1-7. Continuous Paper with Labels Insertion Label size Front entry See the figure below; Bottom entry
6 3 .5 m m (2 .5 ")
( 1 5 /1 6 " )
L a b e l
2 3 .8 m m
R 2 .5 m m
( 0 .1 " )
Base sheet width Base sheet length Base sheet thickness Total thickness Label weight Quality
Figure 1-1. Label 101.6 ~ 254.0mm ( 4 ~ 10" ) 101.6 ~ 558.8mm ( 4 ~ 22" ) 0.07 ~ 0.09mm ( 0.0028 ~ 0.0035" ) 0.16 ~ 0.19mm ( 0.0063 ~ 0.0075" ) 2 68g/m (17 lb) A very continuous form labels, a very mini-line labels or the same quality labels Table 1-8. Roll Paper
Insertion Width Thickness Weight Quality
Rear entry 216mm ( 8.5" ) 0.07 ~ 0.09mm ( 8.5" ) 2 52 ~ 82g/m ( 14 ~ 22 lb ) Plain paper, not curled, not folded, not crumpled
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TYPEFACE Bit map Font
Bar code fonts
EPSON Draft 10cpi, 12cpi, 15cpi EPSON Roman 10cpi, 12cpi, 15cpi, Proportional EPSON Sans Serif 10cpi, 12cpi, 15cpi, Proportional EAN-13, EAN-8, Interleaved 2 of 5, UPC-A, UPC-E, Code 39, Code 128, POSTNET
CHARACTER TABLES Standard version NLSP version INPUT BUFFER 0 Kbytes / 32 Kbytes
11 tables 19 tables
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 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)
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ACOUSTIC NOISE 55 dB(A)
( ISO 7779 pattern )
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 MTBF Print head life RIBBON CARTRIDGE Type Color Ribbon life SAFETY APPROVALS 120 V version Safety standards EMI 230 V version Safety standards EMI
6.5 million lines ( Except Print head) (4000 POH ) approx. 100 million characters
Fabric Black Approx. 3 million characters ( Draft 10 cpi, 14 dot / chr. )
UL 1950 CSA C22.2 No. 950 FCC part 15 subpart B class B, CSA C108.8 class B EN60950 ( VDE, NEMKO ) 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 ) Weight Approx. 7.6 kg
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CONSUMPTION & OPTIONS Table 1-9. Consumable & Option Consumption Ribbon cartridge Ribbon pack Options High capacity cut sheet feeder ( Bin1 ) Single bin cut sheet feeder ( Bin 2 ) Pull tractor unit Roll paper holder Front paper guide Front sheet guide Serial Interface card 32KB intelligent serial Interface card 32KB intelligent Interface card Local Talk I/F card 32KB IEEE-1284 I/F card Coax I/F card Twinax I/F card IEEE-1284 parallel I/F card Ethernet I/F card "*": According to each destination. Code No. #8750 #8758 C80638* C80637* C80020* #8310 C81402* C81400* C82305* / C82306* C82307* / C82308* C82310* / C82311* C82312* C82313* C82314* C82315* C82345* C82347*
Figure 1-2. Exterior View of the FX-880
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1.2 OPERATION
This section describes the operations equipped with this printer.
1.2.1 Control panel
The control panel of this printer consists of 5 switches and 5 LEDs, as shown below;
F o n t
D ra D ra R o m R o m S a n S a n ft ft C a n a n s s s s
T e a r O ff/B in
T e a r o ff B in 1 B in 2
L F /F F
L o a d /E je c t
P a u s e
P a p e r O u t O p e ra te
o n d e n s e d C o n d e n s e d e r if e r if C o n d e n s e d
M ic r o A d ju s t
3 s e c
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; (1) Operate 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 the printer.
(2) Pause 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 the non-printing status, the Micro Adjust function and Font selection are enabled. If it is pressed again, these function are disabled. (3) Load/Eject - Loads the paper when the printer is out of paper. - Ejects the paper to the paper park. (4) LF/FF - Feeds a line if pressed shortly. - Feeds the continuos paper or eject the cut sheet. (5) Tear Off Advances the continuos paper to the Tear-OFF position. If it is pressed again, the paper is moved to the TOF position. (6) Bin Selects the CSF bin number when the CSF is used. (7) Font Selects the font from the list on the panel when the Micro Adjust function is enabled. (8) Micro Adjust 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 the TOF position after loading the paper, and the Tear-off adjustment is enable in the Tear-off position.
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1.2.2.2 Operations at Power-on
Pressing the specified switch (switches) while turning on the printer enables the following special functions: 1. Self test - Switches : Function: - Switch: Function: Load / Eject while turning on the printer. Executes the printing LQ self test printing. LF / FF turning on the printer. Executes the Draft self test printing.
2.
Data dump mode Switches : Function: Load / Eject and LF / FF switches at same time while turning on the printer. Executes the data dump function.
3.
Clearing the line counter value for the ribbon life in the EEPROM Switches: Function: Tear-off / Bin and Pause at same time while turning on the printer. Clears the line counter value stored in the EEPROM.
4.
Bi-D adjustment Switches: Function: Pause switch, while turning on the printer. Executes the Bi-D adjustment.
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1.2.3 Indicators ( LEDs )
This printer has the following indicators to indicate its current condition as shown in the table below: 1. Pause ( Orange ) Comes On when the printer is paused, and goes Off when the printer is not paused. Blinks when the Micro adjust function and the Font selection are enabled or the printhead is in the overheated condition. Paper Out ( Red ) Comes On when the printer is in the Paper out condition. Blinks when the paper eject error has occurred . Tear Off / Bin ( Green ) Blinks when the continuos paper is in the tear off position. Comes On when the CSF Bin1 is selected, and goes Off when the CSF Bin2 is selected. Font ( Green ) Indicates the font selections. Table 1-10. LED Status Printer status Pause Paper out error Release lever error Paper eject warning Head hot warning Micro adjust & Font selection Tear off Bin selection Font selection Tear-Off / Bin ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ According as ¾ paper path According as ¾ bin selection According as ¾ font selection Blinks Blinks Font Pause On On On On Blinks Blinks ¾ ¾ ¾ Blinks Paper Out ¾ On ¾ Blinks Blinks ¾ ¾ ¾ ¾ Blinks
2.
3.
4.
Fatal error
1.2.4 Buzzer
This printer has the buzzer to indicate its current condition with the following indications: Table 1-11. Buzzer Status Printer status Beep sounds YYY Paper out error Release lever error YYY Paper eject warning Y Illegal panel operation Note: The symbols used in the table represents the following: " Y " = A beep sounds for approximately 100 ms with the interval of approximately 100 ms. " " = A beep sounds for approximately 500ms with the interval of approximately 100ms.
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1.2.5 Default setting mode 1
You can change some parameters that the printer refers to at printer initialization.
1.2.5.1 Setting Method
Refer to the following flowchart for the default setting mode 1.
S T A R T
H o ld in g d o w n T e a r o f f / B in s w itc h , tu r n o n th e p r in te r .
R e fe r r in g to th e F o n t a n d T e a r o ff/ B in L E D s , p u s h T e a r o f f /B in s w itc h to s e le c t th e m e n u .
L a n g u a g e s e le c tio n s h e e t R e fe r r in g to th e P a u s e a n d P a p e r O u t L E D s , p u s h L o a d /E je c t s w itc h to c h a n g e th e s e ttin g v a lu e . P u s h d o w n L o a d /E je c t s w itc h to s e le c t th e a im e d la n g u a g e .
C h a n g e th e la n g u a g e ?
Y E S
N O
F in is h ?
P u s h d o w n T e a r o f f / B in s w itc h . T u r n th e p r in te r o ff to s a v e th e s e ttin g s . S e le c t th e m e n u , s e le c t m e th o d a n d c u r r e n t s e ttin g a r e p r in te d .
E N D
Figure 1-4. Flowchart for Default Setting Mode 1
1.2.5.2 Setting Items
Setting values available for the default setting mode including factory settings 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) On, Off On, Off On, Off Bi-D, Uni-D Auto, Parallel, Option 10 sec., 30 sec. ESC/P, IBM 2380 Plus 0, Ø On, Off On, Off On, Off On, Off table 2, table 1
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 ( IBM 2380 Plus )*1 *1: This setting is effective when the IBM 2380 Plus emulation is selected only.
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1.2.6 Default Setting Mode 2
Refer to the following flowchart for the default setting mode 2.
S T A R T
H o ld in g d o w n T e a r o f f / B in a n d L F /F F s w itc h e s , tu r n th e p r in te r o n .
R e fe r r in g to th e F o n t a n d T e a r o ff/ B in L E D s , p u s h T e a r o f f /B in s w itc h to s e le c t th e m e n u .
L a n g u a g e s e le c tio n s h e e t R e fe r r in g to th e P a u s e a n d P a p e r O u t L E D s , p u s h L o a d /E je c t s w itc h to c h a n g e th e s e ttin g v a lu e . P u s h d o w n L o a d /E je c t s w itc h to s e le c t th e a im e d la n g u a g e .
C h a n g e th e la n g u a g e ?
Y E S
N O
F in is h ?
P u s h d o w n T e a r o f f / B in s w itc h . T u r n th e p r in te r o ff to s a v e th e s e ttin g s . S e le c t th e m e n u a n d th e m e th o d , a n d th e c u r r e n t s e ttin g s a r e p r in te d .
E N D
Figure 1-5. Flowchart for Default setting mode 2
1.2.6.1 Setting Items
Setting values available for the default setting mode including factory settings are as shown in the following table: Table 1-13. Setting Values Available for Default Setting Mode 2 Items Page length for front tractor Page length for rear tractor Character table Setting values (BOLD font : factory setting) 3 inch, 3.5 inch, 4 inch, 5.5 inch, 6 inch, 7 inch, 8 inch, 8.5 inch, 11 inch, 70/6 inch, 12 inch, 14 inch, 17 inch 3 inch, 3.5 inch, 4 inch, 5.5 inch, 6 inch, 7 inch, 8 inch, 8.5 inch, 11 inch, 70/6 inch, 12 inch, 14 inch, 17 inch Standard version: Italic, PC437, PC850, PC860, PC863, PC865, PC861, BRASCII, Abicomp, Roman 8, ISO Latin 1 NLSP version: Italic, PC437, PC850, PC437 Greek, PC 853, PC855, PC852, PC857, PC866, PC869, MAZOWIA, Code MJK, ISO 8859-7, ISO Latin 1T, Bulgaria, PC774, Estonia, ISO 8859-2, PC866 LAT. Italic U.S.A., Italic France, Italic Germany, Italic U.K., Italic Denmark 1, Italic Sweden, Italic Italy, Italic Spain 1
International character set for Italic table
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1.2.7 EEPROM Clear Function
You can change some parameters into the factory settings to perform panel operation easily. Pressing Tear off / Bin and Load / Eject switches at same time while turning on the printer turns the default settings into the factory settings: Table 1-14. Cleared Items and Values on EEPROM (Standard Model) Item Character table selection Page length for rear tractor Page length for front tractor Page length for CSF bin 1 Page length for CSF bin 2 TOF adjustment value for rear tractor TOF adjustment value for front tractor TOF adjustment value for CSF bin 1 TOF adjustment value for CSF bin 2 TOF adjustment value for rear manual insertion TOF adjustment Value for front manual insertion Bottom margin for rear tractor Bottom margin for front tractor Font Selection Print direction setting I/F mode selection Auto I/F waiting time setting Auto line feed Auto tear off Skip over perforation High speed draft Input buffer Software 0 slash Buzzer Auto CR Tear-off adjustment value Manual insertion time Tear-off wait time I/F timing data TOF minimum value Paper edge length Paper length for rear manual insertion Paper length for front manual insertion sub number for customization Value PC437 11 inch 11 inch 22 inch 22 inch 8.5 mm 8.5 mm 8.5 mm 8.5 mm 8.5 mm 8.5 mm 11 inch 11 inch Draft 10 cpi Bi-D Auto 10 sec. Off Off Off On On ESC/P Off On Off 0 2 or 3 sec. 3 sec. BUSY timing data 4.2 mm 0 22 inch 22 inch Standard
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1.2.8 Bi-D Adjustment
Refer to the following flowchart for the Bi-D adjustment.
S T A R T
H o ld th e p a lig n w ith in g r in m e th e d o w n P a u s e s te r o n , a n d th e n t p a tte r is p r in g u id e fo r th e a ] th e n u m b e a lig n e d p a g th e L F /F je c t s w itc h w itc h , tu rn fir s t te d a lo n g d ju s tm e n t.
[S te p A S e le c t c lo s e ly p r e s s in L o a d /E
r fo r th e m o s t tte rn b y F s w itc h a n d e s .
[S te p B ] F ix th e s e le c te d n u m b e r b y p r e s s in g T e a r O ff/B in s w itc h , a n d th e n e x t a lig n m e n t p a tte r is p r in te d . R e p a d ju 1 . 2 . 3 . e a t S te p s A a n d B u n til fin is h in g th e s tm e n t fo r th e fo llo w in g m o d e s : H ig h s p e e d d r a ft m o d e D ra ft m o d e N L Q m o d e T u r n th e p r in te r o ff, a n d th e n e w s e ttin g s a r e s to r e d in th e n o n - v o litile m e m o ry .
E N D
Figure 1-6 . Bi-D Adjustment flowchart
Rev. A
1-13
&+$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 r iv e r IC C R M o to r D r iv e IC G a te a rra y E 0 5 B 5 0
C N 3
P S R A M P r in t H e a d D r iv e r C P U P R O M
E E P R O 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.
F u s e C N 1 C N 2 S w itc h in g F E T P h o to - c o u p le r T ra n s fo rm e r R e g u la to r IC
D io d e B r id g e
Figure 2-2. C229PSB/PSE Component
Rev. A
2-1
FX-880 Service Manual Chapter 2 Operating Principles
2.2 PRINTER MECHANISM
This printer mechanism consists of Printhead, Paper feed mechanism, Carriage movement mechanism, Tractor feed mechanism, Platen gap adjustment mechanism, Ribbon feed mechanism, PF motor, CR motor, detectors, and so on.
2.2.1 Printhead
The printhead prints data from the control board on paper using the ink ribbon. The printhead is mounted on the carriage unit.
2.2.2 Paper Feed Mechanism
The paper feed mechanism picks up paper and transports it to the printhead, then ejects it step by step or continuously driven by the PF motor. PF motor drives the paper feed mechanism gears and the platen roller. The top of form and paper out condition are detected by front and rear PE detector, respectively.
2.2.3 Carriage Movement Mechanism
The carriage movement mechanism carries the carriage unit left and right along the CR guide shaft and mechanism frame and stops it at any position for printing. It is driven by the torque sent from the CR motor via the timing belt. Home position is detected by the HP (home position) detector at power on and CR motor phase changing timing.
2.2.4 Tractor Feed Mechanism
The tractor feed mechanism feeds continuous paper to the printhead and ejects it. The torque from the PF motor is transferred to the tractor unit via the release mechanism in the paper feed mechanism. The release mechanism switches the PF motor torque between cut sheet feeding and continuous paper feeding by the release lever. This printer is equipped with several tractor feeding methods (front / rear push tractor feeding, front / rear push & pull tractor feeding and front / rear pull tractor feeding), which is selected according to the tractor unit setting positions and the lever positions. The tractor detector detects the release lever setting position in cut sheet feeding or continuous paper feeding.
2.2.5 Platen Gap Adjustment Mechanism
The platen gap (the gap between the platen and the printhead) adjustment mechanism consists of CR guide shaft, parallelism adjustment bushing, PG adjust lever and PG detector. PG adjust lever is attached to the left side of the CR guide shaft. The bushings are attached to the both sides of the frame. As the both sides part of CR guide shaft is eccentric toward external form of it, printhead approaches or recedes from the platen roller to turn the PG lever forward or backward. PG detector detects PG lever position. If the lever is set 2nd and more position, the printer gets into copy mode.
2.2.6 Ribbon Feed Mechanism
The CR motor drives the ribbon feed mechanism via the timing belt. The ribbon feed mechanism has the sun and planetary gear system. No matter the carriage unit is driven left and right, the ink ribbon is driven in one direction.
Rev. A
2-2
FX-880 Service Manual Chapter 2 Operating Principles
T ra c to r
R e le a s e L e v e r
R e le a s e D e te c to r
R e a r P E D E te c to r P la te n R o lle r F ro n t P E d e te c to r
P F M o to r
P a r a lle lis m
B u s h in g
P r in th e a d C R G u id e S h a ft P a r a lle lis m B u s h in g
C R M o to r C a r r ia g e U n it R ib b o n F e e d M e c h a n is m P G A d ju s t L e v e r H P D e te c to r T im in g B e lt
Figure 2-3. Printer Mechanis Outline
Rev. A
2-3
FX-880 Service Manual Chapter 2 Operating Principles
2.3 CIRCUIT OPERATION
2.3.1 C229PSB/PSE Power Supply Circuit
This printer can be powered by either of two power supply boards: the C229PSB (120V) board or the C229PSE (230V) board. The function of these two boards is the same , except for a difference in the primary circuitry. The power supply outputs the DC current necessary to drive the printer control circuit and drive the mechanism. The input voltages and fuse ratings for these boards are as shown in the following table: Table 2-1. Input Voltage and Fuse Rating Board C229PSB C229PSE Input Voltage 85-138VAC 187-276VAC Fuse F1 Rating 4A, 125V or 250V 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 5V·}5% 0.7A (Type-B I/F output is included.) 35V·}6% 0.8A Applications Logic lines Detectors Panel Switches & LEDs 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.
A C L in e In p u t
L in e F ilte r
Z C - R C C S w itc h in g R e g u la to r - O v e r C u r r e n t p r o te c tio n - O v e r V o lta g e p r o te c tio n R e g u la to r IC + 3 5 V D C
+ 5 V D C
P S C
Figure 2-4. Power Supply Circuit Block Diagram
Rev. A
2-4
FX-880 Service Manual Chapter 2 Operating Principles
2.3.2 C229MAIN Board Circuit
The C229MAIN board is the control circuit board of this printer. This board consists of several IC chips and drivers, as shown in the table below: Table 2-3. Function of the Main IC Element TMP96C141AF Location IC3 Function 16 bit CPU runs at 14.47MHz - Main controller - Detectors control - CR Motor Control 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 Reset IC : Hardware reset function EEPROM : System control data (Market, TTL threshold, Bi-D setting, Page length, TOF, etc.) containing 1M/4M bit - Buffer and Working area of CPU & Gate array 2/4M bit EPROM/ Mask ROM - Control program containing CR Motor driver PF Motor driver Power-off signal sensing
T h e r m is to r
E05B50
IC2
PST594E AT93C46
IC1 IC4
PSRAM ROM SLA7024M A2917SEB Comparator
IC5 IC7 IC8 IC11 IC12
P r in th e a d
H e a d D r iv e r
C G
P S R A M
O p e r a tio n P a n e l G .A . E 0 5 B 5 0 (IC 2 )
A d d r e s /D A T A B u s R O M C P U T M P 9 6 C 0 1 A F (IC 3 )
P G
D e te c to r
P a r a lle l I/F
R e a r P E D e te c to r F ro n t P E D e te c to r H P D e te c to r R e le a s e L e v e r D e te c to r
R e s e t IC T y p e -B I/F ( O p tio n ) E E P R O M
P F M o to r D r iv e r
C R M o to r D r iv e r + 3 5 V D e te c to r
Figure 2-5 . C229MAIN Board Circuit Block Diagram Rev. A
2-5
FX-880 Service Manual Chapter 2 Operating Principles The data from the host computer is stored in the input buffer once, then converted into image data and transmitted to the printhead through the gate array, as shown in the figure below:
H o s t c o m p u te r
P r in t d a ta c o n v e r s io n
In p u t b u ffe r
Im a g e b u ffe r Im a g e d a ta tra n s fe r
R A M
C P U
D a ta la tc h a n d d a ta o u tp u t
G a te a rra y
P r in th e a d d r iv e r c ir c u it
Figure 2-6. Data Flow
Rev. A
2-6
&+$37(5
TROUBLESHOOTING
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 Troubleshooting
Unit Repair of the C229PSB/PSE Board
Unit Repair of the C229MAIN Board
Unit Repair of M-3J10 Mechanism
Assembly and Adjustment
END
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) Test Method Meter Reading (Set Meter to Ohms. Disconnect 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 16.0 ± 10% other lead on pin3 (pin 4) each of the (at 25°C par one test pins to check the two motor phases. phase) Common pin : 5, Place one lead on pin 5 and the other 2.7 ± 10% Test pins : 1, 2, 3 lead on each of the 4 test pins to check (at 25°C par one and 4 the two motor phase. phase) Test Pin Number
Rev. A
3-1
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-2. Printhead Solenoid Resistance Part Test Pin Number (See the figure berlow.) Test Method (Set Meter to Ohms. Disconnect Motor from Main Board and check it with Printer Power off.) Specifications
Printhead
Common pin C1 : For example, place one lead on pin C1 and Test pin 1, 4 the other lead on Test pin 1 to check #1 pin Printhead solenoid. The test pin number is just match with the printhead solenoid (dot wire) number. 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
Printhead Connenctor
8.19 ± 0.8 (at 25°C)
Printhead
2
6 C3 8 C4 C5 1 T C1 C2 4 9 7 5 3 T View A A
Printhead Connenctor
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.) Check from base to collector, and check from base to emitter. Reverse leads and test again. Meter Reading
Q2, Q3, Q4, Q5, Q6,Q7, Q8, Q9, Q10
Not open and not shorted from base to collector, base to emitter.
Q11,Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19, Q20
Rev. A
3-2
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-4 Detector Test Point Detector Connector Number HP Detector (CN4) Front PE Detector (CN6) Test Method (Set Meter to Ohms. Check the Printer power off.) 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. Meter Reading
Release Lever Detector (CN10) PG Detector (CN11) Printhead thermistor
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.) Place one lead on pin 1 and the Meter should toggle between other lead on pin 2, and toggle the open and short. (HIGH: detector actuator. Friction Feed mode.) Place one lead on pin 1 and the Meter should toggle between other lead on pin 2, and move the open and short. detector actuator from -0 to 6. (HIGH: PG -1 ~ 3.) Place one lead on pin T and the Approx. 14K (at 17°C) other lead on other pin T to check the resistance.(Refer to Fig.3-2.)
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 The printer fails to load Set paper to the *** Pause: On paper. printer correctly. Release lever Pause: ON The release lever is set Set the release ----error to a wrong position. lever to the correct position. Turn off the Fatal error All LEDs : Blink The carriage unit gets printer once and into out of control or turn it back on. power supply voltage becomes incorrect. 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.
Rev. A
3-3
FX-880 Service Manual 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 Printer fails to operate when power is on. Abnormal carriage operation at power on. Problem 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 selftest is executed correctly, but data is not printed. z Data from the computer is printed incorrectly. See Page 3-5 3-6
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
3-7
3-8 3-9 3-10
The repair procedure flowcharts use the following symbols:
START
Start
Branching
Preocessing
Forwarding to another items
Return to the Start of the item
END
Decision
END
Figure 3-3. Symbols Used in the Flowcharts
Rev. A
3-4
FX-880 Service Manual Chapter 3 Troubleshooting 1. Printer fails to operate when power is on.
START
Is AC input voltage normal? 120V version: 85 - 138V 230V version: 187 - 276V
NO
Use the correct AC input voltage. No fluctuation from AC voltage range is permitted.
YES
Are the fuses F1 on C229PSB/PSE blown?
YES Replace the fuse.
NO
NO Is the new fuse also blown when power is turned on again?
Measure the +35V line at pin 7 or 8 of CN2 on C229PSB/PSE.
YES Replace the C229 PSB/PSE.
Is output voltage normal? YES
NO
Measure the +5V line at pin 3 or 4 of CN2 on C229PSB/PSE.
Is output voltage normal? YES
NO
Replace the C229 PSB/PSE.
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
Replace the applied unit.
END
Figure 3-4. Flowchart (1) Rev. A
3-5
FX-880 Service Manual Chapter 3 Troubleshooting 2. Abnormal carriage operation at power on.
START
Are all connectors connecting the C229MAIN board and printer mechanism?
NO Reinsert the connectors correctly.
YES NO Is the fault solved? YES
END
Dose the carriage move to the home position? YES
NO
See the troubleshooting for Printer Mechanism.
Replace the C229MAIN Board.
NO Is the fault solved? YES
END END
Figure 3-5. Flowchart (2)
Rev. A
3-6
FX-880 Service Manual Chapter 3 Troubleshooting 3. Printing is faulty during self-test, but carriage operation is normal.
START
Is AC input voltage normal? 120V version: 85 - 138V. 230V version: 187 - 276V. YES Holding down the LF/FF or YES Load/Eject switch, turn on the printer to start self test printing.
NO
Use the correct AC input voltage. No fluctuation from AC voltage range is permitted.
NO Is printing executed? YES
Are all connectors connecting the C229MAIN board and printer mechanism?
NO
YES Is the vertical line aligned? YES Is the fault solved? YES YES NO Perform the Bi-D adjustment.
Reinsert the connectors correctly.
NO
NO Is the fault solved?
END
NO Is any dot missing? YES Verify FFCs are properly inserted and have continuity. If they are not defective, replace the printhead.
END
Adjust the Platen Gap.
NO Is the fault solved? YES
Replace the C229MAIN board.
END
END
Figure 3-6. Flowchart (3)
Rev. A
3-7
FX-880 Service Manual Chapter 3 Troubleshooting 4. Abnormal paper feeding
START
Is the paper loaded correctly? YES
NO
Load the paper correctly.
Is the connector CN5 or CN6 connected correctly? YES
NO
Reinsert the connector CN5 or CN6 correctly.
NO
Is the fault solved? YES
END
Dose the platen knob rotate smoothly when it is turned manually at power off? NO
YES
Refer to the troubleshooting for Printer Mechanism.
Replace the C229MAIN board. Is the fault solved? Is the fault solved? YES NO YES Replace the C229MAIN board. NO
Refer to the troubleshooting of Printer Mechanism.
END
END
END
Figure 3-7. Flowchart (4) Rev. A
3-8
FX-880 Service Manual Chapter 3 Troubleshooting 5. Abnormal control panel operation
START
Do the switches have clicks? YES
NO
Replace the Operation Panel.
Is the fault solved? YES
NO
Replace the C229MAIN board.
Is the fault solved? YES
NO
Verify that the harness for the operation panel is properly inserted and have continuity. If it is connected, replace the harness.
END
END
END
Figure 3-8. Flowchart (5)
Rev. A
3-9
FX-880 Service Manual Chapter 3 Troubleshooting 6. Data sent by the host computer is printed incorrectly.
START
Execute the printer self test.
NO Dose the self test print normally? YES Verify the default setting. Refer to the other troubleshooting items.
Is the interface cable connected correctly? YES
NO Replace the interface cable.
NO Is the fault solved? Replace the C229MAIN board. YES
END
NO Is the fault solved? YES
Increase the setting position of the paper thickness lever.
NO Is the fault solved? YES
Adjust the platen gap. (Refer to chapter 4.)
END
END
Figure 3-9. Flowchart (6)
Rev. A
3-10
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 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. Cause Checkpoint Solution
Switching FET (Q1) is defective.
Replace the C229PSB/PS E board.
The printer dose not operate at all.
+35V line is defective. Figure 3-10. Drain of Q1 Verify the waveform at corrector of Q2 or Q3.
Q2 or Q3 is defective.
Replace the C229PSB/ PSE board.
Figure 3-11. Corrector of Q2/Q3
Rev. A
3-11
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-7. Repair of the C229PSB/PSE (continued) Condition Symptom Verify the waveform at pin 5 or 7 of PC1. Cause Checkpoint Solution
+35V line is defective.
PC1 is defective.
Replace the C229PSB/ PSE board.
Figure 3-12. Waveform of PC1 Verify the waveform at pin 5 of IC51.
The printer dose not operate at all.
Replace the C229PSB/ PSE board.
+5V line is defective.
Regulator IC (IC51) is defective.
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
3-12
FX-880 Service Manual 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 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. Cause Checkpoint Solution
The reset circuit is not operational.
5V line
Replace the C229MAIN board.
/RESET
The printer dose not operate at all.
The CPU dose not operate.
Figure 3-15. Reset Signal Verify the signal at pin 22, IC7 or pin 30, IC6 which changes between HIGH and LOW.
Selection control ROM is abnormal
Replace the C229MAIN board.
Figure 3-16. Chip Select Signal for Program ROM
Rev. A
3-13
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-9. Repair of the C229MAIN (continued) Condition Symptom Verify the oscillator signal at pin 26 or 27 of the CPU (IC3). Cause Checkpoint Solution
The printer dose not operate at all.
The CPU dose not operate.
The CPU is defective.
Replace the C229MAIN board.
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.
The carriage operates abnormally.
The carriage dose not operate at all.
IC8 is defective.
Pin 5 of IC8
Pin 1, of IC8
Replace the C229MAIN board.
Figure 3-18. CR Motor Control Signal
Rev. A
3-14
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-10. Repair of the C229MAIN (continued) Condition Symptom 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. Cause Checkpoint Solution
The paper feeds abnormally.
The paper dose not feed at all.
IC 11 is defective.
Pin 1 of IC11
Replace the C229MAIN board.
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
Self test printing is abnormal.
The self test printing is not executed or a particular dot is not printed.
Any transistor of Q2 - Q10 is defective.
BASE of Q5
Replace the C229MAIN board.
CORRECTOR of Q5
Figure 3-20. Pritnhead Drive Signal Any transistor from Q11 to Q25 is 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 the C229MAIN board.
-
-
Replace C229MAIN board.
3-15
FX-880 Service Manual Chapter 3 Troubleshooting
3.5 REPAIRING THE PRINTER MECHANISM
For detailed procedures for replacing or adjusting matter, refer to Chapter 4, Disassembly and Assembly and Chapter 5, adjustments. If a problem or symptom occurs, refer to following tables to try find other potential causes. Table 3-11. Repairing the Printer Mechanism Symptom Cause Problem: The CR motor fails to operate. The CR motor fails to Foreign substances drive the timing belt are lodged in the after power on. mechanism. The CR motor is defective. Checkpoint Solution
Manually move the Remove the timing belt to see if the foreign substance. motor can rotate freely. Replace the CR Measure the motor coil motor (and main resistance. It should be board, if about 16 ohms. If the necessary). coil is shorted, also verify CR motor driver IC8 on the main board. Problem: The carriage dose not operate when power on (after carriage has been centered prior to power on manually). The CR motor rotates, The belt drive or Verify the pulleys which Replace the but the carriage dose driven pulley is are broken or worn. pulleys. not move. defective. The timing belt is Verify the timing belt is Reset the belt to defective. set correctly to the the carriage. carriage. Verify whether the timing Replace the belt. belt is broken or not. Clean and The carriage moves to The carriage Verify whether the lubricate the CR the left slightly, then movement is not carriage moves guide shaft or stops. smooth. smoothly when move frame. Otherwise, manually. replace the CR motor. The carriage moves to The HP detector is Verify the HP detector Replace the HP the left or right end, defective. by multi meter. detector. then stops. Problem: Self test printing is not executed. Set the FFC to the The carriage moves, The printhead FFC Verify whether FFC is printhead or the but dose not print. common wires are set or not to the main board disconnected. printhead or the main correctly. board. Replace the The printhead is Measure the printhead defective. coil resistance. It should printhead, (and drivers , if be about 8 ohms. If the necessary). printhead is shorted, also verify the drivers on the main board.
Rev. A
3-16
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-12. Repairing the Printer Mechanism (continued) Symptom Cause Checkpoint Problem: Self test printing is not executed. A particular dot is The printhead is Measure the printhead coil missing. defective. 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. The printhead is Verify whether head wire is The printing is too defective. born or not. light, or the print density is not uniform. The platen gap is Set the gap adjustment properly adjusted. lever to the first position, and check the platen gap. The correct PG is 0.365 ± 0.015. Problem: Paper feed is abnormal. Printing is performed Foreign substances Verify the paper path but the paper is not are lodged in the whether any foreign fed or is fed paper path. substance is put on. uniformly. The PF motor dose Verify the mechanism not drive the whether any foreign mechanism. substance is put on. The PF motor is Measure the motor coil defective. resistance. It should be about 16 ohms. If the motor is shorted, also verify the drivers on the main board. Problem: The ribbon is abnormal. The ribbon is not The ribbon cartridge is Remove the ribbon turning. defective. cartridge, verify to rotate its knob manually, and to see if the ribbon feeds normally. Foreign substances Verify whether the RD are caught in the ratchet rotates when the gears. carriage is moved manually toward left and right. Solution 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.
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 planetary gear in the ribbon drive gears is defective.
Move the carriage manually: verify whether the ribbon feed gears turns in reverse and engages the gear.
Remove any foreign substances. Otherwise, replace the ribbon feed mechanism. Replace the ribbon feed mechanism.
Rev. A
3-17
FX-880 Service Manual Chapter 3 Troubleshooting Table 3-13. Repairing the Printer Mechanism (continued) Symptom Cause Checkpoint Solution Problem: Paper becomes stained with ink. Ink stains appear on The ribbon mask is Make sure the ribbon Reinstall the ribbon printed areas. positioned incorrectly. mask is in the correct mask. position. Adjust the platen The platen gap is not Set the gap adjustment adjusted correctly. lever to the first position, gap. Refer to the chapter 5 and verify the platen gap. The correct platen Adjustment. gap is 0.365±0.015. Problem: Printing continues after the paper ends or when no paper is loaded. Printing continues The PE detector is Check if the PE detector Replace the PE past the end of the defective. is bad. detector. page.
Rev. A
3-18
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". Any adjustments required after disassembling the units are described under the heading "ADJUSTEMNTS".
4.1.1 Disassembly Precautions
Follow the precautions below when disassembling the printer.
WARNING
Before disassembling, assembling or adjusting the printer, disconnect the power supply cable from the AC power socket. Failure to do cause personal injury. careful with the printhead when you handle it, as it may be very Be hot just after printing. not touch the heat sink attached to the switching FET (Q1) on the Do 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.
CAUTION
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 B741000100 Round-nose pliers B740400100 Thickness gage B776702201 Soldering iron B740200100 E-Ring holder Size: #6 B740800800 Multi-Meter OHM/Voltage/Current Oscilloscope Min. 50MHz Note) All tools and instruments listed above are commercially available.
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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 Printer Mechanism Component Printhead Carriage Mechanism Item to Check Are all wires print properly? 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?) Do all types of paper advance smoothly? Is the tractor feeding paper smoothly? Are all paper paths clear of obstructions? Is the plate free of damage? Is the ribbon mask free of damage? Was the self-test printing successful? Was the on-line printing successful? Is the gap adjusted correctly? (PG = 0.38 ± 0.02mm ) Is the Bi-Directional alignment made properly? Latest version = Has the ribbon cartridge been removed from the printer? Have all relevant attachments been packed together with the printer? Status 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 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 Checked, OK Not necessary Checked, OK Not necessary Checked, OK Not necessary
Paper Feed Mechanism
Paper Path
Ribbon Mask Operation Self-Test On-line Test Adjustment Platen-Gap Bi-D Alignment ROM Packing Version Ribbon Cartridge Attachments
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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 CB Screw CBS Screw CBB Screw CBP Screw CP Screw CB(O) Screw Description Cross-recessed Bind-head Screw Cross-recessed Bind-head S-tight Screw Cross-recessed Bind-head B-tight Screw Cross-recessed Bind-head P-tight Screw Cross-recessed Pan-head Screw Cross-recessed Bind-head Screw with Outside toothed lock washer
Table 4-4. Screw Types and Abbreviations Head Top Crossrecessed Side Bind-head Body Washer (assembled) Outside toothed lock washer
S-tight
Pan-head
B-tight
P-tight
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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
Printer Mechanism Disassembly START
Printhead Removal
CR Motor Removal
PF Motor Removal
PG Detector Removal
Upper Housing Removal
HP Detector Removal Carriage Assembly Removal PF Gear Train Removal
Release Detector Removal
Printer Mechanism Removal
C229MAIN Board Removal Ribbon Drive Assembly Removal C229PSB/PSE Board Removal Rear Paper Guide Assembly Removal
Front PE Detector Removal
Rear PE Detector Removal
Platen Removal
ROM Replacemant
Figure 4-1. Disassembly Flowchart
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4.2.1 Printhead Removal
1. 2. 3. Remove the top cover. Remove 2 CBS (M3 × 8) screws attaching the printhead to the carriage assembly. Disconnect the head FFC from the printhead and remove it.
WARNING
Before disassembling or assembling the printhead, disconnect the power supply cable from the AC power socket. Failure to do cause personal injury. careful with the printer when you handle it, as it may be very hot Be just after printing.
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After replace the printhead, perform the platen gap adjustment. (Refer to Chapter 5.)
Printhead
Head FFC
Figure 4-2. Printhead Removal
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4.2.2 HP (Home Position) Detector Removal
1. 2. 3. Remove the top cover. Release the hook attaching the HP detector to the printer mechanism and remove it. Disconnect the harness of the detector from the detector connector.
H o o k
H P D e te c to r
H a rn e s s
Figure 4-3. HP Detector Removal
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4.2.3 Pre-disassembly Procedures
1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and tractor unit.
P a p e r E je c t