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EPSON TERMINAL PRINTER
LQ-300 SERVICE MANUAL
EPSON
NOTICE
All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON's express written permission is forbidden. The contents of this manual are subjects to change without notice. Alleffortshavebeen made toensuretheaccuracy of thecontentsofthis manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can manual or the consequence thereof.
assume no
responsibility for any errors in
this
Epson is registered trademark of Seiko Epson Corporation. General Notice: Other product names used herein are foridentication purposes only and maybe trademarks of their respective carnpanies.
Copyright @ 1994 by SEIKO EPSON CORPORATION Nagano, Japan
-i-
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 darnage to equipment.
Theprecautionary measures itemized below should alwaysbe 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 PROCEDURE. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNTAMILIARWITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNITTOA 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.
2.
3.
WARNING
1.
REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE 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. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS. 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.
2.
3.
4.
5.
- ii -
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of LQ-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 organized as follows: CHAPTER 1. PRODUCT DESCRIPTION Provides a general product overview, lists specifications, and illustrates the main components of the printer. CHAPTER 2. OPERATING PRINCIPLES Describes the theory of printer operation. CHAPTER 3. DISASSEMBLY AND ASSEMBLY Includes a step-by-step guide for product disassembly 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 -
f=":
REVISION SHEET
Revision Rev. A Issue Date September 28, 1994 Revision Page 1st issue
.$...
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.
.,,
-v1
TABLE OF CONTENTS
CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX
PRODUCT DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY
..
ADJUSTMENTS TROUBLESHOOTING MAINTENANCE
- vi -
CHAPTER
1
Product Description
Table of Contents
1.1 FEATURES
1.2 SPECIFICATIONS
1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-2
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1.2.1.6 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1.2.1.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1.2.1.8 Safety Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1.2.1.9 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 1.2.2 FirmwareS pacifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1-11 1.3 INTERFACE SPECIFICATIONS 1.3.1 Paraliellnterface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 1.3.1.I Compatible Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 1.3.1.2 Reverse Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13 1.3.2 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 1.3.3 Interface Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.3.4 Preventing the Host from Data TransferTimeout . . . . . . . . . . . . . . . . . 1-15
1.4 OPERATING INSTRUCTIONS 1.4.1 Control Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.2 Self-test Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.3 Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.4 Micro Adjustment Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.5 PrinterStatus Indication.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.6 Selected Font . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.7 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.7.1 Power-on Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.7.2 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.7.3 Software Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.8 PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . .......:. . : . . . . . . . . . 1.4.8.1 Selectable PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.8.2 Changing the Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . .
1-16 1-16 1-17 1-17 1-18 1-18 1-19 1-19 1-19 1-19 1-19 1-20 1-20 1-20
1-24 1.5 MAIN COMPONENTS 1.5.1 C143 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 1.5.2 C130PSB/PSE Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 1.5.3 Printer Mechanism (M-5M1O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 1.5.4 Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
List of Figures
Figure 1-1. Exterior View of the LQ-300. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Figure l-2. Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Figure l-3. PrintableAreafor Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Figure l-4. PrintableAreafor Envelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Figure l-5. PrintableAreafor Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Figure l-6. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 Figure 1-7. Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 Figure l-8. C143 MAIN Board Component Layout . . . . . . . . . . . . . . . . . . . . . . I-24 Figure l-9. C130 PSB/PSE Board Component Layout . . . . . . . . . . . . . . . . . . 1-24 Figure 1-10. Printer Mechanism (M-5 M1O). . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 Figure 1-11. Housing Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
,':~\ !!.,
List of Tables
Table l-1. Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Table l-2. PaperThickness LeverSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 (:; Table l-3. Feeding Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Table 1-4. Specifications for Cut Sheet Paper (CSF). . . . . . . . . . . . . . . . . . . . . 1-4 Table 1-5. Specifications for Cut Sheet Paper (Manual Insertion) . . . . . . . . . . . 1-4 Table -6. Specifications forEnvelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Table -7. Specifications for Continuous Paper (Single Sheet and Multi-Part) . 1-4 Table -8. Specifications for Continuous Paper with a Label. . . . . . . . . . . . . . . 1-5 Table -9. Electrical Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Table -lO. CharacterTables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 Table -11. Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 Table -12. Printing Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Table -13. Signal and Connector Pin Assignments forthe Parallel Interface. 1-12 Table -14. Signal and ConnectorPin Assignments forthe Parallel Interface. 1-13 Table -15. Signal and Connector Pin Assignments forthe Serial Interface . . 1-14 Table -16. Paper Feeding Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 Table -17. Font Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Table -18. Font Lightsand Language Selection . . . . . . . . . . . . . . . . . . . . . . . 1-20 f"~. Table -19. Default Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 .. Table -20. CharacterTables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 Table -21. Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Table -22. SkiDOver Perforation/Auto TearOff/AGM/Auto Line Feed EX~/ACK/ State Reply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Table l-23. Graphic Ptint Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Table l-24. Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Tablel-25.interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Table l-26. Bit Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Table 1-27. Parity Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 Table 1-28. Data Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
LWOO Service Manual
Product Description
1.1 FEATURES
The LQ300 is a small, light-weight, 24pin serial impact dot-matrix color printer suitable for personal use. The major features of this printer are: Fast printing of lo-cpi draft characters at 200 cps Compact design saves precious work space q Easy-to-operate panel q Quiet printing q Two built-in 8-bit parallel interfaces and an EIA-232D serial interface q Printing of up to 66 kes on A4-size or 62 lines on letter-size paper q Optional color printing using a color ribbon (black, magenta, cyan, yellow) q Detachable tractor (push, pull, and push-pull tractor feed)
q q
Figure 1-1 shows an exterior view of the LQ-300, and Table 1-1 lists the optional units available for the LQ-300. ~'"pe'"Q@'
lease r
Knob Power s
Sprocket
lever
Center support
Tractor unit
Figure 1-1. Exterior View of the LQ-300
Table 1-1. Optional Units
Model #77!53
#7755 #7768 S015077 C80637* C83211· C80030*
Description
Ribbon oartridge (monochrome) Ribbon oartridge (monochrome, sub-cartridge) Ribbon cartridge (film) Ribbon oartridge (color) Single-bin cut sheet feeder Color upgrade kit Pull tractor unit
* The number represented by an asterisk varies depending on the country.
Rev. A "l-1
Product Description
LQ-300 Service Manual
1.2 SPECIFICATIONS
This
section provides detailed information about the LQ-300.
r
.T,
,$
,'
1.2.1 Hardware Specifications
Printing method: Pin arrangement: Pin diameter: 5erial impact dot matrix 12 x 2, staggered 0.20 mm (0.0079 inches)
. o m .
3f, 5 () E E m II m a
x
L"?"'"
{\ () () 6
?
`o
! ! I
7
()
In 4
9 () 1 1 () 1 3 () 15 ()
i
-!
()
8
() 10
HEAD CENTER
{: . , .-
a . \
`o
17< ) 1 9 ()
21 ( ) 2 2 ()
I
() 1 6
7
ij;;: i()22
I f5 L' 2 4
Figure 1-2. Pin Configuration
Printing direction:
p .....
Bidirectional with logic seeking for text and unidirectional for graphics. (Bidirectional printing of graphics can be selected with a printer setdng or software command.)
1-2
Rev. A
LWOO Service Manual
1.2.1.1 Paper Handling Specifications Paper paths Cut sheet path: Continuous paper paths: Continuous paper parking: CSF: Feeding pitch: Feeding system: u Friction feed
q
Product Description
Rear entry (manual insertion or optional CSF) Cannot handle multi-part paper using friction feed Rear entry ( push tractor feed using the push tractor unit or pull tractor feed using the pull tractor unit or push-pull tractor feed using both tractor units) Possible, using push tractor unit Cannot handle envelopes or multi-part paper % ~~, 1A ~ch, or Programmable feeding in increments of $%o inch, minimum Friction feed or &actor (push, pull, and push-pull) feed
Set the release lever to the friction position. . Insert the left edge of the sheet at the marked position. q Do not.perform reverse feed in the area within 0.63 inch (16 mm) from the bottom edge of the sheet.
Push tractorfeed Set the release lever to the tractor position. Install the tractor unit in the rear in the push &actor position. q On the first page (that is, the page immediately after sheet loading) the accuracy of paper feeding is not guaranteed within the area 0.87 inch (22 mm) from the top edge of the sheet. q On the last page, the accuracy of paper feeding is not guaranteed after the paper comes off the tractor pins. q During printing oflabels, never perform reverse feeding. q Do not eject the labels from the rear.
q q
u Pull tractor feed Set the release lever to the tractor position. . Install the tractor unit in the top in the pull tractor position. q Do not perform reverse feeding. q Do not eject them from the rear.
q
Push pull tractor feed Set the release lever to the tractor position. Install one tractor unit in the rear in the push tractor position and install the other tractor unit in the top in the pull tractor position. . Do not perform reverse feeding. q Do not eject the paper from the rear.
q q
Paper thickness leve~
The adjust lever must be set to proper position for the paper thickness, as shown below.
Table 1-2. Paper Thickness Lever Settings
Lever Position Paper Thickness 0.065 mm -0.12 mm (0.0026 in. -0.0047 in.) 0.12 mm -0.19 mm (0.0047 in. -0.0075 in.) 0.19 mm -0.26 mm (0.0075 h. -0.01 in.) Corresponding Paper Ordinary paper Multi-part forms (2 sheets)
o
1 2
Multi-part forms (3 sheets)
Multi-part forms (4 sheets) Envelopes (20 lb.) Envelopes (24 lb.)
3
4 5
0.26 mm -0.32 mm (0.01 in. -0.013 in.)
0.32 mm -0.44 mm (0.013 in. -0.017 in.) 0.44 mm -0.52 mm (0.017 in. -0.02 in.)
Paper-feeding speed:
See Table 1-3.
Rev. A
1-3
Product Description
LQ-300 Service Manual
Table 1-3. Feeding Speed
Lever Position o, 1 Feeding Friction Tractor 1/6 inch Line Feed Max. 94 ins/line Typ. 80 ins/line (*) Min. 75 ins/line I I Continuous Feed Max 3.6 incheslsec. Typ. 3.3 incheshec (*) Min. 2.8 inchhec. Max. 2.8 incheslsec. Typ. 2.5 inche.shec.' Min. 2.2 incheskec.
I
2-5
Friction Tractor
Max. 106 redline Typ. 104 ins/line (*) Min 94 m.s/line
* Feed speed is varies depending on the motor driving voltage. 1.2.1.2 Paper Specifications
Table 1-4. Specifications for Cut Sheet Paper (CSF)
Width Length Thickness Weight Qualitv 182 mm -216 mm (7.2 in. -8.5 in.) 210 mm -364 mm (8.3 in. -14.3 in.)
10.07 mm -0.12 mm (0.0028 in. -0.0047 in.)
64-90 g/m2 (18 -24 lb.) Plain oaDer. recvcled DaDer
I
Table 1-5. Specifications for Cut Sheet Paper (Manual Insertion)
Width Length Thickness Weight Quality 148 mm -257 mm (5.8 in. -10.1 in.) 182 mm -364 mm (7.2 in. -14.3 in.) 0.065 mm -0.14 mm (0.0025 in. -0.0055 in.) 52.3-90 g/m2 (14 -24 lb.) I Plain paper, recycled paper
Table 1-6. Specifications for Envelopes
Size Thickness Weight Quality 6 No. 10
No.
Width x Length: 166 mm x 92 mm (6.5 in. x 3.6 in.) Width x Length: 240 mm x 104 mm (9.5 in. x 4.1 in.)
0.16 mm - 0.52 mm (0.0063 in. - 0.0197 in.) 45- 91 g/m2 (12 -24 lb.) Bond paper (not curled, folded, or crumpled), plain paper, airmail paper
Notes: . Printing of envelopes is guaranteed only at room temperature and normal humidity (15
- 25° C (59 - 77° F) ,20- 60% RI-I). q Variations in envelope thickness must be less than 0.25 mm (0.0098 in.). . When inserting envelopes, keep the longer side horizontal.
Table 1-7. Specifications for Continuous Paper (Single Sheet and Multi-Part)
Width Total thickness Weights Copies Quality 101.6 mm - 254 mm (4.0 in. - 10.0 in.) 0.065 mm - 0.32 mm (0.0025 in. - 0.012 in.) 52.3- 82 g/m2 (14 - 22 lb.) -- not multi-part 40- 58.2 g/m2 (12 - 15 lb.) -- multi-part 4 sheets (1 original + 3 copies) Plain paper, recycled paper, carbonless multi-part paper
1-4
Rev. A
LQ-300 Service Manual
Product Description
Table 1-8. Specifications for Continuous Paper with a Label
Label size (W x L) Width of base paper Thickness of base paper Total thickness Weight Quality Notes:
63.5 mm (min.) x 23.8 mm (min.) [ 2.5 in. (min.) x 15/16 in. (min.)]
101.6 mm -254 mm (4.0 in. x 10,0 in.) 0.07 mm - 0.09 mm (0.0028 in. - 0.0031 in.) 0.16 mm -0.19 mm (0.0063 in. - 0.0075 in.) 68 g/m2 (17 lb.) Plain paper
q Use only continuous-type labels and use them only with the tractor. . Examples of labels --Avery Continuous Form Labels --Avery Mini-Line Labels q Printing of envelopes is guaranteed only at room temperature and normal humidity (15 - 25° C (59 - '77° F) ,20- 6(Mo RI+).
1.2.1.3 Printable Area
Cut sheets
3mm[0.12"] minimum
D --
G-
3mm[0.12"] minimum
b
-- -- --
4
5,3mm[0.2"] minimum
. :.,
Printable area
-- --
4
9mm[0.35"] minimum
Figure 1-3. Printable Area for Cut Sheets
Rev. A
1-5
Product Description Envelopes
3mm[0.12"] minimum 3mm[0.12"] minimum
LQ-300 Service Manual
k,
=,
AL 5.3mm[0.21"] minimum
Printable area
T
Continuous paper
13 mm minimum 10.51 m ], ~ : 4----++ 203.2 mm [8"], maximum
13.5mm[0.53*] minimum
Figure 1-4. Printable Area for Envelopes
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, .o---0, 0, 0, 0, 0, 0, 0, Q-r-0,
0, 0, 0, 0, 0, 0, 0, 04 0, 0,
0, 0, 06
:0
,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,0
0 ., . - . . . . . . . - . . . . - . . 0,
,0
,0
:6
0, 0,
,0 ,0 ,0 ,0 ,0
,0 ,0 ,0
,0 ,0 ,0 ,0
,0 ,0 ,0
,0 ,0 ,0
0,
Figure 1-5. Printable Area for Continuous Paper
1-6
Rev. A
LQ-300 Service Manual
Product Description
1.2.1.4 Ribbon Specifications
Ribbon cartridge (mono): Ribbon cartridge (film): Ribbon cartridge (color): Ribbon color: Black ribbon life: Film ribbon life: Color ribbon life Black: Magenta: cyan: Yellow: #7753 #7755 (sub-cartridge) #7768 S015077 Black, magenta, cyan, yellow 2 million characters (48 dots/character) 0.2 million characters (48 dots/character) 1 million characters (48 dots/character) 0.7 million characters (48 dots/character) 0.7 million characters (48 dots/character) 0.5 million characters (48 dots/character)
1.2.1.5 Electrical Specifications Table 1-9. Electrical Ranges
Description
Rated voltage Input voltage range Rated frequency range I Input frequency range Rated current I I 1.1 A
120 V Version
120 VAC 103.5-132 VAC 50- 60 t-fz 49.5- 60.5 Hz 1
230 V Version
220-240 VAC 198-264 VAC
I
0.6 A
Dielectric strength
1000 VAC ms for 1 minute or 1500 VAC rms for 1 minute 1200 VAC rms for 1 second (between AC line and chassis) (between AC line and chassis)
1.2.1.6 Environmental Conditions
Temperature range: 5to35"C (41 to 95 "F) Operation (film ribbon): 15to35`C (59 to 95 `F) Operation (envelopes, labels, or recycled paper): 15to25`C (59 to 77°F) Storage: Operation: Operation (film ribbon): 20 to55`C (-4 to 131 `F) 5 to Humidity (without condensation):
80?40 RH
Operation:
10 to 80Y0 RH
Operation (envelopes, labels, or recycled paper): 20 to 60Y0 RH Storage: 5 to
W'/. RH
1.2.1.7 Reliability
MTBF: Printhead life:
4000
power on hours (POH)
200 million strokes/wire (with monochrome ribbon) 100 million strokes/wire (with color and film ribbon)
Rev. A
1-7
Product Description
LQ-300 Service Manual
1.2.1.8 Safety Approvals
Safety standards: UL1950 with D3, CSA22.2 #950 with D3 U.S. version: European version: EN 60950 ~) IEC950 (SEMKO, DEMKO, NEMKO, SETI) Radio frequency interference: U.S. version: FCC part 15 subpart B class B (RFI) European version: Vfg.243 (VDE0878 part 3, pati 30) EN55022 (CISPR PUB. 22) class B
,ffq
L-. .,
1.2.1.9 Physical Specifications
Dimensions (W x D x H): Weight without tractoc
366 x 275x 141 mm (14.4 x 10.8x 5.6 inches) without tractor
4.3 kg (9.5 lb.)
1.2.2 Firmware Specifications
Control codes: ESC/P2 IBM X24E emulation EPSON remote 8KB
Input data buffer Download memory: Character sets: Character tables:
10KB
14 international character sets and one legal character set
Table 1-10. Character Tables
Character Table ITALIC PC437 (US, Standard Europe) PC850 (Multilingual) PC860 (Portuguese) PC861 (Icelandic) PC863 (Canadian-French) PC865 (Norwegian) BRASCII Abicomp PC852 (East Europe) PC853 (Turkish) PC855 (Cvrillic) Standard Model NLSP* Model
o o o
o
0 0 0
x x x x
o
o
o o
x x x
Iolxl
x o o o
PC857 (Turkish)
PC864 (Arabic) PC866 (Russian) PC869 (Greek) PC437 Greek ISO Latin IT (TuAish) ISO 8859-7 (Greek) Code MJK (Czecho, Slovakia) MAZOWIA (Polland) Bulgaria (Bulgaria)
Ixlol
Ixlol
x x x x x x x x o o o o o o o o
x Not suppofled 0 Suppotied ` NSLP = National Language Suppori
1-8 Rev. A
LC?-300 Service Manual
Product Description
Bitmap fonts:
Scalable fonts:
Character matrix: Print mode:
Resolution: Printing speed and printable columns:
(10 cpi/ 12 cpi/ 15 cpi) EPSON Draft (10 cpi/ 12 cpi/ 15 cpi/ Proportional) EPSON Roman EPSON Saris Serif (lOcpi/ 12cpi/ 15cpi/ Proportional) (10 cpi/ 12 cpi/ 15 cpi) EPSON Courier (10 cpi/ 12 cpi) EPSON Prestige (10 cpi/ 12 cpi) EPSON Script 8-32 points (units= 2 points) EPSON Roman 8-32 points (units= 2 points) EPSON !%ns serif 8-32 points (units= 2 points) EPSON Roman T EPSON Saris Serif H 8- 32points (units =2points) Drailt 10 cpi; 12 horizontal dots, 24 vertical dots NLQ 10 cpi; 36 horizontal dots, 24 vertical dots Double-width Double-height Condensed Bold Double-strike Italics Super/subscript Outline Shadow Underline (single, double, single-broken, double-broken) Strike-through (single, double, single-broken, double-broken) OverScore (single, double, single-broken, double-broken) See Table 1-11. See Table 1-12.
Table 1-11. Resolution
Printing Mode
Draft Draft condensed LQ 8-pin bit image
Horizontal
Density 120 dpi 240 dpi 360 dpi 60 dpi 120 dpi 120 dpi 240 dpi 80 dpi 90 dpi
Vertical Density 180 dpi 180 dpi 180 dpi 60 dpi 60 dpi 60 dpi 60 dpi 60 dpi 60 dpi 180 dpi 180 dpi 180 dpi 180 dpi 180 dpi
Adjacent Dot Printed? No No No Yes Yes No No Yes Yes Yes Yes Yes Yes No
24-pin bit image
60 dpi 120 dpi 90 dpi 180 dpi 360 dpi
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Product Description
LWOO Service Manual Table 1-12. Printing Speed
Printing Mode Draft
Chg\;gter
Printable Columns 80 96 120 137 160 80 96 120 137 160
Maximum Print Speed [cps] Mode 1 200 240 300 171 200 67 80 100 114 133 Mode 2 133 160 200 114 133 50 60 75 86 100 Mode 3 100 120 150 86 100 33 40 50 57 67
F".}
10 cpi 12 cpi 15 cpi
Draft condensed
17 cpi 20 cpi 10 cpi 12 cpi 15 cpi
LQ condensed Vote:
17 cpi 20
Each maximum print speed is changeable depending on attributes of characters within
T >12 "C
Th c 0.19 m m
--c
V:
Normal
--
--
Mode 1
Mode 3
V: Down
V: Normal
--
{ T <12 "C
Printing Mode
J
Mode 2
+_ V: Down-- Mode 3
~Th>01,mm{T212 .+;:;:;: -.
T <12 "C {" Down-- Mode 3 V: Th: Paper thickness T : Printhead temperature V : Printhead driving voltage
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Product Description
1.3 INTERFACE SPECIFICATIONS
LQ-300 has a Centronics
1.3.1 Parallel Interface
The parallel interface has two modes: . Compatible mode q Reverse mode
1.3.1.1 Compatible Mode
Data format: Synchronization: Handshaking: Signal level: Adaptable comector: Data transmission timing:
Note:
.
8-bit parallel By STROBE pulse synchronization By BUSY and ACKNLG signals Tl_'L-compatible level (IEEE-P1284 level 1 device) 36-pin 57-30360 (Amphenol) or equivalent See Figure 1-6.
Transition time (rise time and fall time) of every input signal must be less than 0.2 ps.
BUSY ACKNLG
DATA S T R O B E
--
~
.
Figure 1-6. Data Transmission Timing
The BUSY signal is active (HIGH) under the following conditions: . During data reception (See Figure 1-6.) When the innt buffer is full . When the INIT input signal is active . During a printer error . During the self-test mode . During the default setting mode . When the parallel interface is not selected
q
The ERROR signal is active (LOW) under the following conditions: . When a paper-out error occurs . When a release lever operation error occurs q When a fatal error occurs The PE signal is active (HIGH) under the following conditions:
q
When a
paper-out error occurs
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Product Description
LQ-300 Service Manual
Table 1-13 shows the connector pin assignments and signal functions for the 8-bit parallel interface.
Table 1-13. Signal and Connector Pin Assignments for Parallel Interface
Pin No. Signal Name STROBE 1 19 DATAO-DATA7 2-9 ACKNLG 10 11 12 13 14 15,34 16 17 18 19-30 31 32 33 35 36 * BUSY `
E
. c%
(!!%"%
`0'
Description The STROBE pulse is used to read the input data. The pulse width must be more than 0.5 ps. Input data is latched after the falling edge of this signal. Parallel input data to the printer. A HIGH level means data 1. A LOW level means data O. This pulse indicates data has been received and the printer is ready to accept more data. The pulse width is approximately 12 U.S. HIGH indicates the printer cannot acoept more data. HIGH indicates paper-out. This signal is effective only when the ERROR signal is LOW. Always HIGH output. (Pulled up to +5 V through 3.3K Q resistor.) Not used. Not connected. Signal ground. Chassis ground. Pulled up to +5 V through 3.9K Q resistor. Signal ground. Input for printer initialization. Pulse width 50 w minimum, active LOW. LOW indicates that some error has o=urred in the printer. Signal ground. Pulled up to +5 V through 3.3K Q resistor. Not used.
-c.-
In
20-27
In
28 29 28 28 30 . -- -- -- . 30 29 -- -- 30
out out out out In -- -- -- out -- In out -- out In
SLCT AFXT NC GND Chassis GND LOGIC-H GND INIT ERROR GND +5V SLIN
{,,'".
7%e //0 column indicates the direction of the signal as viewed from the printer.
`{`
. . .
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Product Description
1.3.1.2 Reverse Mode LQ-300 reverse mode supports IEEE-P1284 nibble mode, described in this section.
Transmission mode: Signal level: Adaptable connector: IEEE-P1284 nibble mode IEEE-P1284 level 1 device 36-pin 57-30360 (Arnphenol) or equivalent
Table 1-14. Signal and Connector Pin Assignments for Parallel Interface
Pin No. 1 2-9
10 11 12
Signal Name HostClk DATAO-7
Ptrclk PtrBusy / DataBit-3,7 AckDataReq / DataBit-2,6
C%%"% 19 20-27
28 29 28
`0' In
In out out out
Description Host clock signal.
Signals DATAO through DATA7 represent data bits O to 7. Printer clook signaL Printer busy signal and reverse channel transfer data bit 3 or 7. Acknowledge data request signal and reverse channel transfer data bit 2 or 6. X-flag signal and reverse channel transfer data bit 1 or5. Host busy signal. Not oonnected. Signal ground. Chassis ground. Pulled up to +5 V via 3.9K Q resistor. Signal ground. Not used. Data available signal and reverse channel transfer bit O or 4. Signal ground. Not oonnected. Pulled up to +5 V via 3.3K S2 resistor. 1284 active signal.
13
14 15 16 17 18 19-30 31 32 33 34 35 36 *
Xflag I
DataBit-l,5 HostBusy NC GND Chassis GND Logic-H GND m DataAvail / DataBit-0,4 GND NC +5 v 1284-Active
28
30 -- . -- -- -- 30 29 -- -- -- 30
out
In -- -- -- out -- In out -- -- out In
The l/O column indicates the direction of the signal as viewed from the printer.
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Product Description
LQ-300 Service Manual
1.3.2 Serial Interface
The LQ-300 is equipped with an 8-bit serial interface, standard. Data format: Synchronization: Handshaking: Word length Start bits: Data bits: Parity bit: Stop bits: Bit rate: Logic level MARK ~OgiCid 1): SPACE (logical O): Parity check: Connectoc EIA-232D serial Asynchronous By DTR protocol, X-ON/X-OFF protocol, ETX/ACK protocol 1 bit 7 or 8 bits (selectable) Odd, even, or none (selectable) 1 bit 300,600,1200,2400,4800, 9600,19200 bps (selectable)
3 V to 25 V +3 v to +25 v Odd, even, or no parity bit (selectable) EIA standard 25-pin D-SUB female comector
Table 1-15. Signal and Connector Pin Assignments for Serial Interface
Pin No. 1 2 3 4 7 11 20 5,6,8-10, 12-19, 21-25 * Signal Name Chassis GND TXD RXD RTS Signal GND REV DTR NC
* . . . \>, ~
I/o'
-- out In out -- out out -- Chassis ground. Transmit serial data. Receive serial data.
Description
Request to send. Always SPACE level when the printer is powered on. Pulled up to +12V via 4.7K Q wsistor. Return path for data and control signals. Conneoted directly to the DTR signal. Indicates that the printer is ready to receive data or not. No connection (not used).
l%e //0 column indicates the direction of the signal as viewed from the printer.
,-,...
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Product Description
1.3.3 Interface Selection
The printer has 2 interfaces: parallel and serial. These interfaces can be selected manually in default-setting mode or selected automatically.
q
Manual selection One of the two interfaces can be selected in default-setting mode.
. Automatic selection When automatic interface selection is enabled in default-setting mode, the printer is initialized to idle state scanning, in which an interface receives data when it is powered on, and the interface that receives data first is selected. When the host stops data transfer, and the printer is in the standby state for 10 or 30 seconds (time selectable in the default-setting mode), the printer returns to the idle state. As long as the host sends data to the printer interface in the BUSY state, the currently selected interface remains the same. . Interface state and interface selection When the parallel interface is not selected, the interface is in the BUSY state. When the serial interface is not selected, the interface sends X-OFF and sets the DTR signal MARK. When the printer is initialized or returned to the idle state, the parallel interface is in a READY state, the serial interface sends X-ON and sets the DTR signal SPACE. Notice that the interrupt signal such as a INIT signal on the parallel interface is not effective while that interface is not selected.
1.3.4 Preventing the Host from Data Transfer Timeout
Hosts abandon attempts at data transfers to peripherals when a peripheral is in BUSY state for dozens of seconds continuously. To prevent hosts from this ldnd of timeout, the printer receives data very slowly, several bytes per minute, even if the printer is in BUSY state. This slowdown is started when the rest of the input buffer becomes several hundreds of bytes. Finally, when the input buffer is full, the printer goes into the BUSY state continuously.
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Product Description
LQ-300 Service Manual
1.4 OPERATING INSTRUCTIONS
This section describes control panel operation functions, self-test, hexadecimal dump, paper feed, micro adjustment, and printer initialization methods.
1.4.1 Control Panel Operation
The printer control panel contains three non-lock-type push buttons and three LED indicators for easy operation of the various printer functions.
Lights A
Buttons
I.ight
Roman O 0
S a r i s Seriio Courier*
q
Py:li!: :
Draft O W Condensad q
Font
& /FF
Pause
O Draft
q
//
I
2
~1'[1
Paper Parkd
1'$!!d
h 3sec
I W ~ Micro Adjust
Figure 1-7. Control Panel
Buttons
Pause:
Font: LFIFF:
Switches printer status between printing and no printing, if there is print data in the input buffer. When the printer is out of paper, the light flashes and the beeper sounds three times. S&c& one of the available fonts. When you hold down this button while you turn on the printer, you enter the printer setting mode. When you press this button, the printer feeds paper line by line. Hold it down to load a single sheet, or to advance continuous paper to next top-of-form position.
Indicators Pause (Orange): Font 1 and 2 (Green): Special Mode Self-test mode: Hex dump mode: Default-setting mode: Micro adjustment mode: Paper park mode: Hold down the LF/FF button and turn on the printer. Hold down the LF/FF and Font buttons and turn on the printer. Hold down the Font buttons and turn on the printer. Hold down the Pause button or Font button. Hold down the Font and LF/FF buttons together. Lights when the printer in pause mode. Indicates the currently selected font.
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Product Description
Table 1-16. Paper Feeding Functions
Tractor Feed Operations Not Paper Out Paper Out State Friction Feed Not Paper Out
Line feed Eject Press LF/FF and Font buttons at the same time Insert a sheet to the manual insetiion slot Paper park (*1)
I
Paper Out State
Load a sheet (*2) Load a sheet (*2)
--
--
-- After 2 seconds load the sheet manuallv (*2)
--
--
--
(*l):~@n the printer is in tear-off state, the.w functions a~ performed after returning from the tear-off position. (*2) Gce a manually inserted sheet is loaded, the printer enters manual insertion mode. After that, even if data remains in the buffer, the printer goes into a paper out error state at the end of every a sheet and waits for insertion of the next sheet. The CSF is enabled again by sheet loading operation from the CSF or by initialization.
1.4.2 Self-test Function W section explains how to run the self-test.
1. Hold down the LF/FFbutton and turn on the printer to start the self-test. 2. If paper is not loaded, the printer attempts to load it. 3. The printer prints alphanumeric characters continuously. 5. Quit self-test mode printing bypressingthe Pause button and turning the printer off.
1.4.3 Hexadecimal Dump Function
The hexadecimal dump is a useful tool for troubleshooting data control problems. This section describes how to run a hex dump. Turn on the printer while holding down the LF/FF and Font buttons. If paper is not loaded, the printer attempts to load it (either single sheet or continuous paper). If the printer cannot Ioad the paper, it indicates a paper-out error. In this case, insert paper again, and press the Pause button. 4. The printer waits for data after printing the message "Hex dump(*)." English or German is selected "Hex Dump": French is selected "Codes Hexadecirnaux": Italian is selected "Dump esadecimale": "Volcado hex": Spanish is selected 5. Received data is printed as both hexadecimal codes and ASCII characters. If a corresponding printable character does not exist, the printer outputs a period (.). 6. Quit hexadecimal dump printing by pressing the PAUSE button and turning the printer off. Note: In hex dump mode, the character table depends on the default setting, and 10 cpi draft is selected automatically. 1. 2. 3.
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1.4.4 Micro Adjustment Function To enter adjustment mode, press the Pause button for three seconds, until the printer beeps once and the Pause lights bhnk to indicate that the adjustment operation is available. If the printer state is not one of the conditions shown below, this operation is ignored. TOF position adjustment: The position can be adjusted just after the paper is loaded. q Tear-off position adjustment: The position can be adjusted when paper is actually located at the tear-off position.
q
... `~ f. ., .
In the adjustment mode, press the LF/FF button to feed paper forward and the Font button to feed paper backward. You can cancel adjustment mode by pressing the Pause button or inputting a print coremand. The adjusted position is stored in non-volatile memory. 1.4.5 Printer Status Indication This section describes how the printer indicates status and error conditions using LEDs and the beeper. The symbols below describe the frequency of beeper sounds. (.): The beeper sounds for 100 rns with an interval of 100 ma between beeps. (--): The beeper sounds for500rns. signal is active: During initialization: Standby or printing state: Pause state: Micro adjustment mode:
While initialize
Pause light is on. Pause light blinks Pause light is off
Tear-off: Paper-out error state("l) Operating error (~), fatal error (*3):
Notes:
Pause light is on Beeper sounds ( q ) and Pause light blinks. (light on:off ratio= 1:1) Pause light blinks (light on:off ratio= 1:6) Beeper sounds (.. . ) and Pause light blinks (light on:off ratio= 6:1) Beeper sounds (-- ) and Pause light is on.
(*1):
A paper-out error occurs with any of the following conditions: q Paper is not loaded after loading is attempted. q A full sheet finishes printing after single sheet loading by manual insertion. q The end of condrmous paper is reached. When a paper-out error occurs, the printer stops printing and enters the pause state. After that, when a sheet is loaded, the PAUSE light stops blinking and the light stays on, but the printer remains in the pause state. Press the PAUSE button to start printing.
(*2):
(*3):
An operating error occurs for any of the following conditions: q The release lever is set to the TRACTOR position without ejecting cut sheets. q The release lever is set the FRICTION position without ejecting continuous paper. A fatal error occurs with any of the following conditions: q Power supply voltage is abnormal. q Printhead temperature is abnormal.
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Product Description
1.4.6 Selected Font
The combination of two Font LEDs (1 and2) is used to indicate the selected font. To choose one of the seven internal fonts listed on the control panel, press the Font button.
Table 1-17. Font Selection
Selected Font
Roman Saris Serif Courier Prestiae script Draft Draft condensed
\ Font 1 Light I
On On
Font2
Light
On off On On
off
Blinkina Blinking On off
off
Blinking off
1.4.7 Printer Initialization
There are three types of initialization: software initialization. power-on initialization, hardware initialization, and
1.4.7.1 Power-on Initialization
The power-on initialization is performed by turning the printer powered on. When the power-on initialization is performed: . The printer mechanism is initialized. q The hardware initialization is performed. 1.4.7.2 Hardware Initialization Hardware initialization is performed by: . Turning on the printer. . The falling edge of a negative pulse ora low signal on theparallel interface /INITline. When hardware initialization is performed: q Print data in the input buffer is cleared. . Download character definitions are cleared. . The printer's settings areretumed to the defaults. q The printer is set to the standby condition, if no fatal error occurs. 1.4.7.3 Software Initialization Softwme initialization is performed upon receipt of the control code ESC 62. When software initialization is performed: q Print characters in the buffer are not cleared. . The printer setting is changed to the default, but download character definition is not cleared.
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Product Description
LQ-300 Service Manual
1.4.8 Printer Settings
1.4.8.1 Selectable Printer Settings
The following printer settings can be changed by users in default-setting mode: Character table (Standard): Character table (NLSP): Page length: PC437/850/860/861 /863/865 /BRASCII/Abicomp PC437/437 Greek/850 /852/853/855/857/864/866/869 /1S0 Latin IT /1S0 8859-7/Code MJK/Ma.zowia/Bulgaria 11 /12/ 8.5/ 70/6 inches (A4)
l-inch skip-over-perforation: on/Qff Auto tear off: on/mf Graphic print direction: Unidirectional / Bidirectional Software ESC/P2 / IBM X24E AGM: Auto line feed: Interface: Bit rate (serial I/F): Parity bit (serial I/F): Data length (serial): ETX/ACK (serial): State reply
Note:
on/ Q.tl on/Qf Auto selection (10 second wait) / Auto selection (30 second wait)/ Parallel / Serial 300 / 600/ 1200/ 2400/ 4800/ !26Q!2 / 19200 bps None / Odd/ Even 7bits / 8 bits
on/Qll on/Qff Underlines show factory setting.
1.4.8.2 Changing the Default Settings
You can change some parameters that the printer refers to at printer initialization. 1. To enter the default setting mode, turn on the printer while holding down the Font button, The printer prints out the firmware version. Ifpaperisnot loaded, insert a sheet of paper. 2. The printer automatically loads paper and prints a table of languages to choose from: English, French, German, Italian, and Spanish. The Font lights indicate the currently selected language, as shown in the table below.
Table 1-18. Font Lights and Language Selection
Font 1 Light OFF OFF ON ON ON Font 2 Light ON
Blinks
Language English French German Italian Spanish \ I
<-' .,
OFF ON
Blinks
3. Press the Font button to change the language, and press the LF/FF button to select. 4. Press the Font button again after selecting a language. The printer prints help text to guide you in setting defaults. The printed instructions include submenu tables listing all the settings you can change and showing you how the control panel lights appear for each selection. 5. To change the settings, press the Font button to move down and press the LF/FF button to move up in the menu of options shown below. The printer beeps once each time you press the these buttons while you are in this menu.
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Product Deacfiption
Table 1-19. Default Options Font 1 Light
Blinks Blinks
OFF ON Biinks Biinks OFF ON Biinks Biinks OFF ON Biinks Blinks 6.
Font 2 Light
OFF ON
Blinks Biinks OFF ON Biinks Biinks OFF ON Biinks Biinks Biinks Biinks
Pause Light
OFF OFF
OFF OFF ON ON ON ON Blinks Blinks Blinks Blinks Blinks OFF
Setting Character table Page iength
Skip over perforation Auto tear-off Graphic print direction Software AGM Auto line feed interface Bit rate Parity bit Data iength ETWACK I State reply ,
Go to Submenu Tabie 1-20 Table 1-21
Tabie 1-22 Tabie 1-22 Tabie 1-23 Tabie 1-24 Tabie 1-22 Tabie 1-22 Table 1-25 Tabie 1-26 Table 1-27 Tabie 1-28 Tabie 1-22 Tabie 1-22
When you reach the setting you want to change, press the Pause button once. The printer
automatically enters the submenu for that setting. 7. Press the Font button to move the through the settings in the submenu. The printer beeps twice each time you press the Font button while in a submenu. 8. When the lights match your desired setting, press the Pause button to make your selection. The printer saves the new setting and returns to the menu shown above. 9. Repeat steps 5 through 8 for each additional setting you want to change, or skip to step 10 to exit the printer's default setting mode. 10. When you are finished, turn the printer off. Any settings you have made remain in effect until you change them again.
Table 1-20. Character Tables
Font 1 Light OFF
ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON Blinks
Font 2 Light
OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON Blinks Blinks Blinks
Pause Light
OFF OFF OFF OFF ON ON ON ON Blinks Blinks Blinks Blinks Blinks Blinks Blinks
Standard Modei
Pc 437 PC 850 Pc 860 PC 863 PC 865 Pc 861 BRASCII AbicomD -- -- -- -- -- -- --
NLSP Modei
Pc 437 Pc 650 PC 864 PC 437 Greek Pc 652 PC 853 PC 855 PC 857 Pc 866 PC 869 iSO Latin IT ISO 8859-7 Code MJK Mazowia Bulgaria
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LQ-300 Service Manual
Table 1-21. Page Length Font 1 Light
OFF ON OFF ON
Font 2 Light
OFF OFF ON ON
Pause Light
OFF OFF OFF OFF
Setting 11 inches 12 inches 8.5 inches i'0/6 inches
. ..:.~ ... f. .
Table 1-22. Skip Over Perforation / Auto Tear Off/ AGM / Auto Line Feed/ ETWACK / State Reply Font 1 Light
OFF ON
Font 2 Light
OFF ON
Pause Light
OFF ON
Setting
off On
Table 1-23. Graphic Print Direction
Font 1 Light OFF ON Font 2 Light OFF ON Pause Light OFF ON Setting Uni-D Bi-D
Table 1-24. Software
Font 1 Light OFF ON Font 2 Light OFF ON Pause Light OFF ON Setting ESC/P2 IBM X24E
Table 1-25. Interface
Font 1 Light OFF ON OFF ON Font 2 Light OFF OFF ON ON Pause Light OFF OFF OFF OFF Setting Auto selection (10 ms wait) Auto selection (30 ms wait) Parallel Serial
Table 1-26.
Font 1 Light OFF ON OFF ON OFF ON OFF Font 2 Light OFF OFF ON ON OFF OFF ON
Bit Rate
Setting 300 bps 600 bps 1200 bps 2400 bps 4800 bps 9600 bps 19200 bps
gT'., ., .
Pause Light OFF OFF OFF OFF ON ON ON
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Product Description
Table 1-27. Parity Bit
Font 1 Light
OFF ON
Font 2 Light
OFF OFF ON
Pause Light
OFF OFF OFF
Setting
None Even
I
I
OFF
1
Table 1-28. Data Length
Font 1 Light
OFF
Font 2 Light
OFF ON
Pause Light
OFF ON
Setting
7 bits 8 bits J
I
ON
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Product Description
LQ-300 Service Manual
1.5 MAIN COMPONENTS
The main components of the LQ-300 is designed for easy removal and repair. The main components are: s C143 MAIN board: control board s C130 PSB/PSE (120 V/230 V) board: power supply board s M-5M1O: Printer mechanism s Housing
1.5.1 C143 MAIN Board
The C143 MAIN board consists of the TMP90C041 (CPU), an E05B02(GA), a program/CG ROM, a PS-RAM, an EEPROM, etc.
PROM (Program / CG) 4-2 SC5060 (PF Motor Driver) \ [ boll n 0 00 SLA7022M / _ (CR Motor Driver) / 2-M51955B (Reset IC) PSRAM256K TM P90C041 (CPU) EEPROM E05B02(GA) a a o I o'/ 6-STA475A (Printhead Driver)
UPC78M05AHF (Regulator IC)
\ (Color Option) Figure 1-8. C143 MAIN Board Component Layout
1.5.2 C130 PSB/PSE Board The power supply boards are the same as those for the LX-300. The boards have two ratings for input AC voltages: 120 VAC (C130 PSB) and 230 VAC (C130 PSE), Both boards consist of a transformer, switching FETs, regulator IC, diode bridge, etc. The power supply board provides +5 VDC and +35 VDC for the main board and printer mechanism.
Switching FET Transformer Diode Bridge
Power Switch
(j yu-II
\ \
"n=.
n nnnn lu~uuul
u ~
--
m
1
I
1-----
l/--
/
Reaulator IC
Figure 1-9. C130 PSB/PSE Board Component Layout
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Product Description
1.5.3 Printer Mechanism (M-5M1O)
The printer mechanism consists of 24-pin impact dot head, PF motor, RF motor, PE sensor, ~ sensor, PG sensor, release lever sensor, etc.
Figure 1-10. Printer Mechanism 1.5.4. Housing Assembly
This consists of printer cover assembly, edge guide assembly, upper housing, lower housing assembly, etc.
-= Edge Guide Assembly
Printer Cover Assembly
per Housing Assembly
r Housing Assembly
Figure 1-11. Housing Assembly
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1-25
c
: !:, - ,.. .
;"+
,,-, f ~.
',,,..
CHAPTER 2 Operating Principles
Table of Contents
2"1 2.1 PRINTER MECHANISM OPERATION 2.1.1 Printing Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.2 Carriage Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.1.3 Paper Handling Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.1.3.1 Paper Feed Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.1.3.2 PaperAdvance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.1.4 Ribbon Advance Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 2.1.5 Ribbon Shift Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2.1.6 Platen GapAdjustment Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2-1o 2.2 POWER SUPPLY OPERATION 2.2.1 Power Supply Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.2.2 Power Supply Circuit Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.3 CONTROL CIRCUIT
2-12
2.3.1 Control CircuitODeration overvie w . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.3.2 Power On Reset'Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2.3.3 Power OffSensorCircuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2.3.4 Home Position Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.3.5 Paper End SensorCircuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.3.6 Release Lever Position Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.3.7 Carriage MotorDriveCircuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 2.3.8 Paper Feed MotorDriveCircuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.3.9 Printhead Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.3.10 Interface Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2.3.11 EEPROM Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2.3.12 CS Motor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2.3.13 Color Ribbon SensorCircuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 2.3.14 Platen GapSensorCircuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
List of Figures
Figure 2-1. Printhead Operation Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Figure 2-2. Carriage Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Figure 2-3. Friction Advance Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Figure 2-4. Push Tractor Paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . 2-4 Figure 2-5. Pull Tractor Paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . . 2-5 Figure 2-6. Push-Pull Tractor Paper Advance Mechanism. . ...............2-6 Figure 2-7. Paper Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .2-6 Figure 2-8. Ribbon Advance Gear Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Figure 2-9. Color Shift Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . z-g
Figure 2-10. Platen Gap Adjustment Mechanism. . . . . . . . . . . . . . . . . . . . . . . . z-g Figure 2-11. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-11
Figure 2-12. Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Figure 2-13. Power On Reset Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . Z-13
[;?
Figure 2-14. Power Off Sensor Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . Z-13 Figure 2-15. Home Position Sensor Circuit Diagram . . . . . . . . . . . . . . . . . . . . 2-14
Figure 2-16. Paper End Sensor Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 Figure 2-17. Release Lever Position Sensor Circuit Diagram . . . . . . . . . . . . . . 2-14 ,s. -. Figure 2-18. Carriage Motor Driver Circuit Diagram . . . . . . . . . . . . . . . . . . . . . 2-15 1 .. ~, Figure 2-19. Paper Feed Motor Driver Circuit Diagram . . . . . . . . . . . . . . . . . . 2-16 Figure 2-20. Printhead Driver Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 Figure 2-21. Parallel Interface Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Figure 2-22. Serial Interface Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-23. EEPROM Control Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . Figure 2-24. CS Motor Assembly Circuit Diagram . . . . . . . . . . . . . . . . . . . . . Figure 2-25. Color Ribbon Sensor Circuit Diagram . . . . . . . . . . . . . . . . . . . . . 2-18 . 2-18 . Z-18
. 2-19 Figure 2-26. Platen Gap Sensor Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . 2-19
List of Tables
Table 2-1. CR Motor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Table 2-2. PF Motor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Table 2-3. Ribbon Advance Gear Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Table 2-4. CS Motor Specifications . . . . . . . . . . . . . . . . . . . . . .............2-8 Table 2-5. Coloring Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Table 2-6. Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Table 2-7. Power Supply Output Voltages and Applications . . . . . . . . . . . . . . 2-10 Table 2-8. Functions of the Main [C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .....2-12 Table 2-9. Carriage Motor Drive Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
LQ400 Service Manual
Operating Principles
2.1 PRINTER MECHANISM OPERATION
This section describes the printer mechanism and explains how it works.
2.1.1 Printing Mechanism
The printing mechanism is composed of the prirdhead, ink ribbon, and ribbon mask. The printhead is a 24pin head for impact dot printing. Each wire has own drive coil, which causes the wire to move in and out of the printhead to print each dot. The four steps below describe how these driving wires work. 1. A drive signal transmitted from the control arcuit to the printhead drive arcuit is converted to the proper printhead driving voltage, which energizes a corresponding coil. The energized coil then causes the iron core to become magnetized. The magnetic force draws the actuating plate toward the core, and the dot wire, which is connected to the core, rushes toward the platen. When the dot wire impacts the platen, pressing against the ribbon and paper, it prints a dot. When the driving voltage stops energizing the coil, the magnetic force from the iron core vanishes. The actuating plate returns to its original position (the position before coil was energized) with spring action. The dot wire also returns to its original position.
2. 3. 4.
This is the sequence used to print a single dot. The mechanism is equipped with a built-in thermistor for head temperature detection. The temperature detected by the thermistor is converted to an electric signal and fed back to the control circuit.
Wire Resettin S rin
Stopper
Dot Wire
Yn7YY2
.
77 r
\
Actuating Spring Figure 2-1. Printhead Operation Principles
Rev.A
2-1
Operating Principles
LQ-300 Service Manual
2.1.2 Carriage Movement Mechanism
The carriage movement mechanism consists of the carnage assembly, CR motor, timing belt, driven pulley, HP sensor, etc. The CR motor drives the tirnkigbelt. The carnage assembly is connected to the timing belt, which is moved by the CR motor. Figure 2-2 shows the carriage movement mechanism. The printer detects tie carriage home position with the HI? sensor. This sensor is the basis for determin"mg the carriage home position. The HP sensor informs the CPU of the carriage home position. The sensor is ON, when the carriage is pushed to the right or left. The striker on the carriage actives the sensor to indicate the carriage home position, which toggles the sensor to OFF.
Table 2-1. CR Motor Assembly Specifications
I
Type
Category
I
31.5 -38.5 VDC
Requirement 4-phase, 96-pole, HB-type stepping motor
I
Drive Voltaae I Coil Resistance Drive Pulse Frequency Excitation Method
I
1 9 . 6 Q * 8 % (Der Dhase, at25° C,770 F) I Normal Mode Draft Color Mode LQ Constant-voltage 2400 PPS 1600 DDS 2-2 phase excitation 1-2 phase excitation
I
F~
-.. ,.
-1
Figure 2-2. Carriage Movement Mechanism
2-2
Rev.A
LQ-300 Service Manual
Oparating Principles
2.1.3 Paper Handling Mechanism
During normal operation, paper is fed to the printer, advanced to the specified position, and ejected from the printer. These functions are performed by various paper handling mechanisms, such as the &actors, rollers, and gears. This section describes the paper handling mechanism for this printer. 2.1.3.1 Paper Feed Mechanisms Cut sheets are fed by friction. Continuous paper is fed by a tractor. There are three ways to feed with tractors: the push tractor method, the pull tractor method, and the push-pull tractor method. During normal operation, the printer is set up with only one tractor, which functions as either a push or a pull tractor, depending on where it is attached on the printer. To use the push-pull . . tractor feed method, an optional tractor must be attached. There are two ways to insert paper into the printer. Cut sheets use the top entrance and continuous paper uses rear insertion.
2.1.3.2 Paper Advance Mechanism
This section describes how the friction and tractor advance mechanisms feed paper through the printer. The paper advance mechanism consists of the PF motor, platen, driven roller assembly, driven roller cover, tractor assembly, knob, PF gear train, etc. The PF motor can drive the platen both forward and in reveme.
Friction Advance Method
Paper is held by the platen, the PF driven roller, and the eject roller assembly. Turning in the direction of the black arrows, the PF motor pinion gear drives the paper advance reduction gear. The paper advance reduction gear turns the platen gear, PF driven roller, and the platen. The platen drives the driven roller cover; then the driven roller cover drives to eject the paper. The paper advances in the direction of white arrows. Figure 2-3 shows the friction advance method when the paper is fed through the top paper entrance.
Driven Roller Cover
Driven PF Roller
Figure 2-3. Friction Advance Mechanism
Rev.A
2-3
Operating Principles
LQ-300 Service Manual
Table 2-2. PF Motor Specifications
Category
Type Drive Voltage Coil Resistance Drive Pulse Frequency Excitation Method 31.5 -38.5 VDC 58.5 Q * 5% (per phase, at 25°C, 77°F) 800,900, 1000, 1200, 1300 ppS Constant-voltage 1-2 phase excitation
Requirement
4-phase, 48-pole, PM-type stepping motor
Push Tractor Method When the push &actor method is used with the rear entrance, the torque generated by the PF motor is transmitted to the push tractor gear through the PF motor pinion gear, the paper advance reduction gear, and the tractor transmission gear. When the PF motor pinion gear turns in the direction of the black arrows, the tractor gear rotates in the direction of the black arrow and thus feeds the paper into the printer. The paper is advanced by the platen, which is also driven by the PF motor through the gear train.
Continuous Paper / push Tractor
\&@
PE Sensor
o \ I ractor / Transmission Gear / 5 ~P Tractor Gear P& `b
-1. .
Platen wd `aperAdvance -0 ~ Reduction Gear / Driven Roller Cover Platen Gear
Pinion Gear \ PF Motor
Figure 2-4. Push Tractor Paper Advance Mechanism
L WOO Service Manual
Operating Principles
Pull Tractor Method The pull tractor advances paper in basically the same way as the push tractor. When the push tractor is installed at the paper exit instead of paper entrance, the tractor functions as a Pull tractor instead of a push tractor, pulling the paper out of the printer mechanism. Figure 2-5 sho-ws the pull tractor advance mechanism.
Continuous Paper
/hk/ .. ,
Tractor
ear PI
(/
(3"
Platen Gear
PF Motor
0
~d Pinion Gear " -
Figure 2-5. Pull Tractor Paper Advance Mechanism
Rev.A
2-5
operating Principles
Push - Pull Tractor Method
LQ-300 Service Manual
The push-pull tractor method is a combination of the push method, using the standard tractor, and the pull method, using an optional tractor. The two tractors operate simultaneously to push and pull the paper through the printer mechanism. Figure 2-6 shows push-pull &actor operation when the paper is fed through the rear paper entrance.
t .,, .
..'.%
- -.,..,. b
Figure 2-6. Push-Pull Tractor Paper Advance Mechanism
Disengage Lever The disengage lever switches whether or not the printer transmits the torque of the PF motor to the tractor transmission gear. (See Figures 2-5 and 2-6.) The paper path is different from friction feed and tractor feed. The PF driven roller is not in the tractor feed paper path, so continuous paper is not advanced by this roller. Figure 2-7 shows the paper path.
Sheet Guide
Platen
.
,> Cut Sheet
Continuous paper
QY
\ / PF Driven Roller
<&Tractor PE Sensor Assembly
Figure 2-7. Paper Path
2-6
Rev.A
LQ-300 Service Manual
Operating Principles
2.1.4 Ribbon Advance Mechanism The ribbon is held between the ribbon advance roller (ribbon driven gear) and the ribbon pressure roIler. When the carriage moves on the CR guide shaft from left to right and vice versa, the timing belt turns the belt driven pulley. Then the torque is transmitted to the ribbon driving gear through the gear trains. The ribbon driving gear rotates counterclockwise no matter what direction the carriage moves, because a planetary gear is used in the gear linkage.
Table 2-3. Ribbon Advance Gear Linkage
)
I Direction of Carriage Movement Left to right
(indicated by the black arrow) Right to light irtdioated by the white arrow)
1
Gear Linkage
Belt driven pulley + Gear(1)+ Gear (2) -+ Ribbon driving gear Belt driven pulley + Gear(1)+ Gear (3)+ Gear (4) + Ribbon driving gear
The ribbon brake spring, attached to the exit of the cartridge case, prevents slack in the ribbon and keeps the ribbon tension at an appropriate level. The ribbon mask prevents the ribbon from brushing against the paper.
Ribbon Advance Roller \ & Ribbon Pressure
Ink Ribbon Mask
/
R
D
Ribbon Brake Spring Carriage
Figure 2-8. Ribbon Advance Gear Linkage
Rev.A
2-7
Operating Principles
LQ-300 Service Manual
2.1.5 Ribbon Shift Mechanism
This printer can be equipped with a color upgrade kit to print in color. The printer performs color printing unidirectionally. The option is composed of the color ribbon shift mechanism. The color ribbon feed mechanism is shared in common with black ribbon feed mechanism, and the shift mechanism shifts the ribbon cartridge up and down. Table 2-2 shows the CS motor specifications. The motor control system is open-loop, so that when the color is being changed, the positioning is controlled by stepping pulse.
c'
-'$ .;. . . . ..
Table 2-4. CS Motor Specifications
Category Type Drive Voltage Coil Resistance Drive Pulse Freauencv Excitation Method Requirement 4-phase, 48-pole, PM-type stepping motor 35 VDC + 10% 150 Q * 5% (per phase, at 25° C or 77° F) Color shift 500
DDS
I
I Constant-voltage 2-2 phase excitation
1
The ribbon shift mechanism consists of the color ribbon and color upgrade kit. The color upgrade kit is composed of the CS motor, ribbon shift gear/cam, motor driver IC, and color ribbon sensor. The 1-inch-wide color ribbon is separated into four equal-width bands of different colors. The ribbon shift mechanism shifts the ribbon cartridge up and down. When the color ribbon cartridge is loaded, it is possible to print in up to seven colors. One of the four colors on the ribbon is selected by the color ribbon cartxidge motion, which inserts a portion of the plastic posts into the slots in the printer mechanism as a fulcrum. Figure 2-9 illustrates the color shift mechanism. The mechanism shifts the ribbon cartridge by converting the gear rotation to liner motion (up and down) of the color ribbon cartridge, using color shift cam gear. Any color band can be selected by rotation of the CS motor, using the color home position (the position of the black color ban