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EPSON TERM NAL PR NTER
LX-300
(
SERVICE MANUAL
)
EPSON
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.
WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautiomry measures itemized below should always be observed when performin grepair/
maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND
PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCE-
DURE.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH
BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN
THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT
CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN
THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN
WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON
CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT-
AGE, 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 (YI'HER
NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY
APPLICABLE EPSON WARRANTY.
- ii -
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair
of LX-300.
The instructions and procedures included herein are intended for the experience repair technician, and
attention should be given to the precautions on the preceding page. The chapters are organizd as
follows:
CHAPTER 1. PRODUCT DESCRIPTION
Provides a general product overview, lists specifications, and illustrates the main components of the pMter.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Includes a step-by-step guide for product d isassembly and assembly.
CHAPTER 4. ADJUSTMENTS
Includes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides Epson-approved techniques for adjustment.
CHAPTER 6. MAINTENANCE
Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
APPENDIX
Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
The contents of this manual are subject to change without notice.
-iv-
.......
( ( j
REVISION SHEET
Revision Issue Date Revision Page
Rev. A April 6, 1994 1st issue
4
-v-
TABLE OF CONTENTS
CHAPTER 1. PRODUCT DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
CHAPTER 4. ADJUSTMENTS
CHAPTER 5. TROUBLESHOOTING
CHAPTER 6. MAINTENANCE
APPENDIX
- vi -
CHAPTER 1 Product Description
Table of Contents
1.1 FEATURES 1-1
1.2 SPECIFICATIONS 1-2
1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2.1.1 Paper Handling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.2.1.2 Paper Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.2.1.3 Printable Area.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.2.1.4 Ribbon Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.1.5 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.2.1.6 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.2.1.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.2.1.8 SafetyApprovals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.2.1.9 Physical Specifications . . . . . . . ...'..... . . . . . . . . . . . . . . . . . 1-8
1.2.2 Firmware Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.3 INTERFACE SPECIFICATIONS 1-11
1.3.1 Parallel Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.3.2 Serial InterfaceSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
1.4 OPERATING INSTRUCTIONS 1-14
1.4.1 Control Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.4.2 Self-test Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.3 Hexadecimal Dump Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.4 PrinterStatus Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.5 Selected Font . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.6 Paper Position Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.7 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.4.7.1 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.4.7.2 Software Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.4.8 PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.4.8.1 Selectable PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.4.8.2 Changing the DefaultSettings. . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.5 MAIN COMPONENTS 1-21
1.5.1 Ct30 MAIN Board. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.5,2 C130 PSB/PSE Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
.P.::k
List of Figures f
('.
Figure 1-1. Exterior View of the LX-300. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Figure 1-2. Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-3. PrintableArea forCut Sheets Using Manual Insertion. . . . . . . . . . . 1-5
Figure 1-4. Printable Area for Cut Sheets with the CSF. . . . . . . . . . . . . . . . . . . 1=6
Figure 1-5. PrintableArea forContinuous Paper . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Figure 1-6. PrintableArea forRoll Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Figure 1-7. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Figure 1-8. Panel Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Figure 1-9. C130 MAIN Board Component Layout. . . . . . . . . . . . . . . . . . . . . . 1-21
Figure 1-10. C130 PSB/PSE Board Component Layout . . . . . . . . . . . . . . . . . 1-21
List of Tables
Table l-1. Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 1-2. Feeding Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table l-3. Adjust LeverSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table 1-4. Specifications for Cut Sheet Paper (Manual Insertion) . . . . . . . . . . . 1-4
Table 1-5. Specifications for Cut Sheet Paper (CSF). . . . . . . . . . . . . . . . . . . . . 1-4
Table l-6. Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Table 1-7. Specifications for Continuous Paper (Single Sheet and Multi-Part) . 1-4
Table 1-8. Specifications for Continuous Paper with a Label. . . . . . . . . . . . . . . 1-5
Table l-9. Roil Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Table l-10. Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Table 1-11, Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Table 1-12. Character Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Table 1-13. Printing Speed.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Table 1-14, Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Table 1-15 Signal and Connector Pin Assignments for the Parallel Interface. 1-12
(T
Table 1-16. Signal and Connector Pin Assignments for the Serial Interface . . 1-13
Table 1-17 Font Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 `:"""
Table 1-18 Font Lights and Language Selection. . . . . . . . . . . . . . . . . . . . . . . 1-17
Table 1-19 Default Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Table 1-20 Character Spacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Table 1-21 Shape of Zero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Table -22 Skip Over Perforation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Table -23 Character Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Table -24 Auto Line Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Table -25 Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Table -26 Auto Tear Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Table -27 Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Table 1-28. Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Table 1-29. Bit Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Table 1-30. Parity Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Table 1-31. Data Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Table 1-32. EWACK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2o
LX-300 Service Manual Product Daadption
1.1 FEATURES
The LX-300 is a small, light-weight, 9-pin serial impact dot-matrix color printer suitable for
personal use. The major features of this printer areas follows:
0 Fast printing of 10-cpi draft characters at 220 cps
Cl Compact design saves precious workspace
Cl Easy-to-operate panel
LI Quiet printing
CI Standard 8-bit parallel interface and EIA-232D serial interface
D Printing of up to 66 lines on A4-size or 62 lines on letter-size paper
~ Optional color printing usinga color ribbon (black, magenta, cyan, yellow)
~ Detachable push and pull tractor
Figure 1-1 shows an exterior view of the LX-300 and Table 1-1 lists the optional units available for
the LX-300.
Edge guties ~
~p"perwppof's
A
lease
r
YA&
feed
b
Power
.. ./,
w Pfintercover #/<
/'=5
A%
A
Print head
Sprocket unit
-
Paper Jpport Troctof
Figure 1-1. Exterior"View of the LX-300
Table 1-1. Optional Units
I Model Description I
#8750 Ribbon cartridge (monochrome)
#8758 Ribbon cartridge (monochrome, sub-mtridge)
,
I S015073
C80837*
I Ribbon cartridge (color)
Single-bin cut sheet feeder
I
C83208* Color upgrade kit
I C80030* [ Pulitractorunit I
I #8310 I Roil paper holder I
Rev. A 1-1
a
Product Description LX-300 Sarvice Mimual
1.2 SPECIFICATIONS
/- . :.,,
This section provides detailed information about the LX-300. : ,.f
1.2.1 Hardware Specifications
Printing method: Serial impact dot matrix
Pin configuration: 9 wires
Pin diameter: 0.29 mm
Figure 1-2. Pin Configuration
Printing direction: Bidirectional with logic seeking for draft text with monochrome
printing.
Unidirectional printing for graphics, NLQ text, bit image, and color
printing.
1-2 Rev. A
LX-XXI Sarvka Manual Product Description
1.2.1.1 Paper Handling Specifications
Feeding system: Friction feed or tractor (push and pull) feed
Feeding method
Cut sheets: Manual insertion (top entry) and feeding with the
optional cut sheet feeder (CSF)
Continuous paper: Push and pull tractor feeding
Feeding pitch: li~ in~, 1A in~, or pr~ammable feeding in in~ments
of %16 inch, minimum
Paper paths
Cut sheet path: Top entry (manual insertion or the optioml CSF)
Continuous paper paths: Rear entry (push tractor feed)
Rear entry (pull tractor feed)
Continuous paper parking: Possible, using push tractor
CSF: Single bin, manual insertion using optional CSF (top entry)
Paper-feeding speed: See Table 1-2.
Table 1-2. Feeding Speed
Feeding l/G inoh Line Feed Continuous Feed
Friction
79 rns/line 2.78 incheskecond
Tractor (single)
Tractor (double) 96 redline 2.08 inoheakxond
Friction feed
q Set the release lever to the friction msition.
. When a sheet is inserted into the t;p slot, place its left edge at the marked position.
. Donotperform reverse feeds greater than O.27inch(6.8 mm).
Push tractor feed
. Set the release lever to the tractor position.
. Donotperform reverse feeds greater than O.27 inch (6.8 mm).
. During printing ofiabels, never perforrnreverse feeding.
. After printing labels, do not eject them from the rear.
Pull tractor feed
0 Remove the tractor unit from the push position and mount it in the pull position.
q Do not perform reverse feeding.
The adjust lever must be set to proper position for the paper thickness, as shown below.
Table 1-3. Adjust Lever Settings
Lever Position Paper Thickness
o 0.065 mm -0.16 mm (0.0026 in. -0.0063 in.)
1 0.16 mm -0.25 mm (0.0063 in. -0.0098 in.)
b 2 0.25 mm -0.48 mm (0.0098 in. -0.0189 in.)
Rev. A 14
Product Description LX-WI Service Manual
1.2.1.2 Paper Specifications
,..
Table 1-4. Specifications for Cut Sheet Papar (Manual Insertion) (i `-';
Width 182 mm -257 mm (7.2 in. -10.1 in.)
Length 182 mm -364 mm (7.2 in. -14.3 in.)
Thickness 0.065 mm -0.14 mm (0.0025 in. -0.0055 in.)
Weight 52.3-90 g/m2 (14 -24 lb.)
Quality Plain paper, recycled paper
Table 1-5. Specifications for Cut Sheet Paper (CSF)
Size A4 (W x L: 210 mm (8.3 in.) x 297 mm (11.7 in.))
Letter ('W x L: 216 mm (8.5 in.) x 279 mm (11.0 m.))
Thickness 0.065 mm -0.14 mm (0.0025 in. -0.0055 in.)
Weight 64-90 @m* (17 -24 lb.)
QuaMy Plain paper, recycled paper
Table 1-6. Envelope Specifications
Size NO.6 Width 166 mm x Length 92 mm (6.5 in. x 3.6 in.)
No.1O Width 240 mm x Length 104 mm (9.5 in. x 4.1 in.)
Thickness 0.16 mm - 0.48 mm (0.0063 in. -0.019 in.)
Weight 45-90 g/m2 (12 1-24 lb.)
Quality Bond paper (not curled, folded, or crumpled), plain paper, airmail paper
Notes: . Printing of envelopes is guaranteed only when the temperature is room temperature
and humidity is normal (15 - 25