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EPSON
EPSON TERMINAL PRINTER
LQ-870/1170
4000694 REV.-A
NOTICE
* All rights reserved. Reproduction of any part of this manual in any from whatsoever without SEIKO EPSON's express written permission is forbidden. ` The contents of this manual are subject to change without notice. " All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. * The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequences thereof. @ Copyright 1991 by SEIKO EPSON CORPORATION Nagano, Japan
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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 a DANGER headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND THE
HOST COMPUTER BEFORE PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE. 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.
WARNING
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 VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY-AC RATING DIFFERENT FROM THE 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 /wP CHIPS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS. 5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS RECOMMENDED BY THE MANUFACTURER; INTRODUCTION OF SECOND-SOURCE ICS OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.
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PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the LQ-870/l 170. The instructions and procedures included herein are intended for the experienced repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: Chapter 1 Provides a general product overview, lists specifications, and illustrates the main components of the printer. Chapter 2 Chapter 3 Describes the theory of printer operation. Includes a step-by-step guide for product disassembly and assembly. Chapter 4 Chapter 5 Chapter 6 Includes a step-by-step guide for adjustment. Provides Epson-approved techniques for troubleshooting. Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
` The contents of this manual are subject to change without notice.
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REVISION SHEET
A
July 23, 1991
1st issue
~ : . . ..
~<... ,, . ,.
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TABLE OF CONTENTS
CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX GENERAL DESCRIPTION OPERATION PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE
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CHAPTER 1 GENERAL DESCRIPTION
1.1
1.2 1-1 FEATURES .....................................................................................@.m...m..mmo.om. .... S P E C I F I C A T I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3. 1.2.1 1.2.2 1.3 1.4 Hardware Specif ications..........................................."""....".. ...s... 1-3
Firmware Specifications ............................................S.............." 1-9
.... PARALLEL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14 CONTROL 1.4.1 1.4.2 ..... PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
..... Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16 .... Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17
1.5 DIP SWITCHES AND JUMPERs......................................S"..."."."".S"...".".." 1.5.1
1.5.2 1.6
1-18
..... DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 ..... Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19 .... I N S T R U C T I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
OPERATING 1.6.1 1.6.2 1.6.3 1.6.4 1.6.5 1.6.6 1.6.7 1.6.8 1.6.9 1.6.10
..... Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20 Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 Paper-out Detection and Form Override Function ...........1 -21 .... Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21 .... Buzzer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21 Printer .... Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
.... Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22 Paper Loading and Ejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22 .... Tear-off Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23 .. Paper-Thickness Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24 Printer Protection for Heavy Duty Printing . . . . . . . . . . . . . . . . . . . . . . . 1-25 . ..... C O M P O N E N T S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 C060 MAIN Board (Main Control Circuit Board) .............1 -26 C060 PNL Board (Control Panel Circuit Board) ...............1 -27 C060 PSB/PSE Board (Power Supply Circuit Board) ......1 -27 C060 DRV Board (Head Control Circuit Board) .................l -28 M-5D1 O/5D60 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 ..... Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-29
1.6.11
1.7 MAIN 1.7.1 1.7.2 1.7.3 1.7.4 1.7.5 1.7.6
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LIST OF FIGURES
Figure 1-1. Exteror View of the LQ-870/l 170 .....................................1-2 Figure 1-2. Pin Configuration ....................................m.................................l.3 Figure 1-3. Printable Area for Single-Sheet Paper ..............................1-6 Figure 1-4. Printable Area for Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6 Figure 1-5. Character Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .1-13 Figure 1-6. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .1-14 . Figure 1-7. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16 . Figure 1-8. Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20 .... Figure 1-9. Hexadecimal Dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 .. Figure 1-10. Paper-Thickness Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24 Figure 1-11. LQ-870/l 170 Component Layout ....................................1-26 .... Figure 1-12. C060 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 .... Figure 1-13. C069@NL Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-27 Figure 1-14. C060 PSB/PSE Board ...........................................................l.27 Figure 1-15. C060 DRV Board ....................................................................l.28 Figure 1-16. M-5 D10/5D60 Printer Mechanism ..................................1-28
,:,., ~
(:-.
.,,
..... Figure 1-17. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-29
LIST OF TABLES
Table 1-1. Table 1-2. Table 1-3. Table 1-4. Optional Interface Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-l .. ..... Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Specifications for Single-Sheet Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Specifications for Single-Sheet Multi-Part Forms (Carbonless Duplicating Paper) ............................................1-5 Table 1-5. Table 1-6. Table 1-7. Table 1-8. Table 1-9. Specifications for Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5 Specifications for Envelopes ................................................l.5 Specifications for Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..1-5. .. Printing (Text Mode) ...............................................................l.l O ... Printing (Bit Image Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
~.. ,, ..,.
Table 1-10. Character Matrix and Character Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Table 1-11. Connector Pin Assignments and Signal Functions .......l-l 4 Table 1-12. DIP Switch Set 1 (SWl).........................................................l.l 8 ... Table 1-13. DIP Switch Set 2 (SW2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19 \ Table 1-14. International and PC Character Set Selection ...............1 -19 .... Table 1-15. Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-19 ... Table 1-16. Paper-Thickness Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24
REV.-A
1.1 FEATURES
The l_Q-870/l 170 is a small, light-weight, low-cost printer that provides advanced paper handling and is compatible with The LQ-5 10/550. The printer's main features are:
q Use of ESC/P 2 control codes
The printer can print fonts in various point sizes and receive and print raster graphic images.
q Compatibility with LQ and SQ series printers q Printing speeds:
300 characters per second (CPS) in high-speed draft mode at 10 characters per inch (cpi) 330 cps (draft, 12 cpi) 275 cps (draft, 10 cpi) 1 1 0 cps (LQ, 12 cpi) 9 2 cps (LQ, 10 cpi)
q Multiple fonts resident in the printer: nine letter quality (LQ) fonts (Roman, Saris Serif, Courier,
Prestige, Script, OCR-B, Script-C, Orator, and Orator-S) and one draft font
q Clear, easy-to-read printing using standard EPSON fonts q Selection of fonts, condensed printing, and the cut-sheet feeder (C SF) bin using control panel buttons q Advanced paper handling
Continuous paper: Three ways to insert continuous paper, using the front, bottom, or rear paper entrance Auto backout and auto loading when using the front or rear paper entrance Ability to use continuous paper without removing the cut-sheet feeder Ability to use the standard tractor in three positions (two push tractor positions and one pull tractor position) Single-sheet paper: Two ways to insert single-sheet paper, using the front or top paper entrance Auto loading
q Easy handling of single-sheet paper with the optional cut-sheet feeder q Optional tractor that can be used to create a push-pull tractor feeding q Optional interface cards
The LQ-870/l 170 is equipped with the standard EPSON 8-bit parallel interface. The optional interface cards ensure compatibility with a wide variety of computers. Table 1-1 Lists the optional interface cards, Table 1-2 lists the optional units available for the LQ-8 70/1 170, and Figure 1-1 shows an exterior view of the LQ-870/ 1170. Table 1-1 Optional Interface Cards Model No. C82305* C82306" C82307"
C82308*
Description Serial interface card (inch screw) ` 1 Serial interface card (mini screw) ` 1 32KB serial interface card (inch screw)
32KB serial interface card (mini screw)
I
1-1
REV.-A
q The last digit in each part numbers above, represented by an asterisk ('), varies depending on the
country. ` I. You cannot use the printer with the following baud rates: 1800, 200, 134.5, 110, or 75 bps. NOTE: Refer to the "Optional Interface Technical Manual" for more information on the optional interface cards. Table 1-2. Optional Units for LQ-870 Model No. C80637'
C80638" C80020 7753 7768
~...
Description Single-bin cut-sheet feeder
High-capacity cut-sheet feeder Tractor Fabric ribbon cartridge Film ribbon cartridge
Table 1-2-1. Optional Units for LQ-1 170 Model No. I . . Description
("
-w
C80639' I Single-bin cut-sheet feeder C80640'
C80021· High-capacity cut-sheet feeder Tractor
7754 I 7770
I Fabric ribbon cartridge ] Film ribbon cartridge I
q When the last digit in the part number above is represented by an asterisk ("), the number varies
depending on the country.
Figure 1-1. Exterior View of the LQ-870
1-2
REV.-A
1.2 SPECIFICATIONS
This section provides the specifications for the LQ-870/l 170.
1.2.1 Hardware Specifications
Printing method Pin configuration Serial, impact, dot matrix 24 wires; 12 x 2 staggered, diameter 0.2 mm (.008 in.)
Wires 1 Wires 2 ~j ili 1,,
-- ----
1 /90"
T
- - ' + ; ~ (
-+--------
- "
+L_J!!""i
Figure 1-2. Pin Configuration
Feeding methods Friction feeding (front and top paper entrances) Push tractor feeding (front and rear paper entrances) Pull tractor feeding (front and bottom paper entrances) Push-pull tractor feeding (front and rear paper entrances) Line spacing Paper insertion Paper feed speed 1/6 inch, 1/8 inch, or programmable in units of 1/360 inch Friction feeding: front or top paper entrance Tractor feeding: front, bottom, or rear paper entrance Friction feeding without cut-sheet feeder: 59.0 msec for a l/6-inch line feed 3.6 inches per second (ips) during continuous feeding Friction feeding with cut-sheet feeder: 62.7 msec for a l/6-inch line feed 3.3 ips during continuous feeding Tractor feeding: 64.1 msec for a l/6-inch line feed 3.0 ips during continuous feeding
NOTE: Paper handling precautions are listed below.
1-3
REV.-A Friction feeding precautions q Move the release lever to the FRICTION position. q Load paper into the front or top paper entrance. q Do not use continuous paper. q Do not perform any reverse feeds within the top 8.5 mm (.34 in.) or bottom 22 mm (.87 in.) of the paper. . Do not perform reverse feeds greater than 1/6 inch after a paper end is detected. q Use the paper tension unit. . Load single-sheet multi-part forms only into the front paper entrance. . Use only carbonless multi-part forms. Push tractor feeding precautions q Move the release lever to the REAR PUSH/FRONT PUSH position. q Load paper into the rear paper entrance. . Release the friction-feed mechanism. q Multi-part forms must be spot pasted beyond the perforation between the sprocket holes. q Use only carbonless multi-part forms. q Use the paper tension unit. ~ . q Do not perform reverse feeds greater than 1/6 inch. . Because paper feeding accuracy cannot be assured after a paper end is detected, do not perform .:reverse feeds after a paper, end is detected. ., Push-pull tractor feeding precautions q Move the release lever to the REAR PUSH/FRONT PUSH position. q Load paper into the front, rear, or bottom paper entrance. q Release the friction-feed mechanism. q Remove the paper tension unit and attach the pull tractor. q Make sure there is no slack in the paper between the platen and the pull tractor. q Carefully align the pull tractor and push tractor sprockets. . Paper for multiple copies must be spot pasted beyond the perforation between the sprocket holes. q Use only carbonless multi-part forms. q Do not perform reverse feeds greater than 1/6 inch. q Do not perform reverse feeds after a paper end is detected. Pull tractor feeding precautions q Move the release lever to the PULL position. q Load paper into the front or bottom paper entrance. . Release the friction feed mechanism. . Remove the paper tension unit and attach the pull tractor. q Paper for multiple copies must be spot pasted beyond the perforation between the sprocket holes. q Use only carbonless multi-part forms. ` . Do not perform reverse feeds. Paper specifications See Tables 1-3, 1-4, 1-5, 1-6, and 1-7.
{::"-. ,,.
Table 1-3. Specifications for Single-Sheet Paper (80/1 36 column) Width Length Thickness Weight Quality 148 to 257/420 mm (5.8 to 10. 1/1 6.5 in.) (top insertion) 182 to 257/364 mm (7.2 to 10. 1/1 4.3 in.) (front insertion) 364 mm (1 4.3 in.), maximum 0.065 to 0.14 mm (0.0025 to 0.0055 in.) 14 to 24 lb (52.3 to 90 g/m2) Standard paper (such as photocopier paper)
.,.
1-4
REV.-A Table 1-4. Specifications for Single-Sheet Multi-Part Forms (Carbonless) (80/1 36 column)
Width Length Thickness Weight Quality Copies
182 to 2 16/364 mm (7.2 to 8.5/1 4.3 in.) 257 to 297 mm (10.7 to 11.7 in.) 0.065 to 0.14 mm (0.0025 to 0.0055 in.) -- per sheet 0.12 to 0.64 mm (0.0047 to 0.0256 in.) total 17 to 24 lb (52.3 to 90 g/m2) single sheets 12 to 15 lb (40 to 58 g/m2) each Carbonless duplicating paper Four sheets (one original and three copies)
Table 1-5. Specifications for Continuous Paper (80/1 36 column) Width Thickness Weight Quality Copies 101 to 254/406 mm (4.0 to 10.0/16 in.) 0.065 to 0.10 mm (0.0025 to 0.0039 in.) single sheet 0.065 to 0.32 mm (0.0025 to 0.012 in.) total 14 to 22 lb (52.3 to 82 g/m2) single sheet 12 to 15 lb (40 to 58 g/m2) each Standard paper or carbonless duplicating paper 4 sheets (1 original and 3 copies) Table 1-6. Specifications for Envelopes Size
Thickness
Weight Quality Copies
No. 6 = 166 mm x 92 mm (6.53 in. x 3.62 in.) No. 10 = 240 mm x 104 mm (9.45 in. x 4.09 in.) 0.16 to 0.52 mm (0.0063 to 0.0197 in.) Differences in thickness within the printing area must be less than 0.25 mm (0.0098 in.). 12 to 24 lb (45 to 91 g/m2) Bond paper, standard paper, air mail Not available
NOTES: q Printing on envelopes is available only at normal temperatures.
q Load envelopes only into the top paper entrance. q Keep the longer side of the envelope horizontal when you insert it. q Place the left edge of a no. 6 envelope at the sheet guide mark.
Table 1-7. Specifications for Labels Label size 2 1/2 in x 15/16 in. 4 in. x 15/16 in. 4 in. x 7/16 in. 0.07 to 0.09 mm (0.0028 to 0.0031 in.) --for the backing paper 0.16 to 0.19 mm (0.0063 to 0.0075 in.) -- total Not available
Thickness Co~ies
NOTES: q Printing on labels is available only at normal temperatures.
q Only use labels on continuous backing paper with sprocket holes for tractor feeding. q Labels with pressure-sensitive paper must be spot pasted beyond the perforation between
the sprocketholes and the total thickness must be less than or equal to 0.3 mm (0.01 18 in.). You can print labels only when the temperature is between 5 and 35 degrees C (4 1 and 95 degrees F) and humidity is between 10YO and 80'%0 RH.
q Examples of labels: Avery continuous form labels and Avery mini-line labels
1-5
REV.-A Printable area See Figures 1-3, 1-4, and 1-5.
tog insertton
148.257 mm (5.8.10. 1`") > "1) >
& " 1)
front insertion 182-257 mm (72-1 o 1") Printable area Max. 203.2 mm [8 In.)
I
--a--A
85mm [033")
or n -
1
I
ABC
T
XYZ T
364mm
(14 3") mox.
/,/
L
ABC
--
XYZ J
l__J_
i3.5 mm [053") w mue
`1) 3.0 mm (O. 12 in.) or more when paper width is less than 229 mm (9 in.). 25 mm (0.9 in.) or more for top insertion or 26 mm (1.0 in.) or more for front insertion when paper width is 257 mm (1 0.1 in.).
q
For top insertion, paper feeding accuracy cannot be assured within 26 mm (1 .02 in.) from the bottom edge of the paper. For front insertion, paper feeding accuracy cannot be assured within 47.0 mm (1 .85 in.) from the bottom edge of the paper. Figure 1-3 Printable Area for Single-Sheet Paper
<
4 1~
101.254
mm (4.10'") `1
Printable area
`1) T
0 0 0 0 0 0 0 o 0
10
0 0
Printable area 0 0 0 0 0 . ;
~ 9mm(0.35"1
l
ABC -
'
-1
XYZ
.:,,
9mm(0.35"1
or more
"""-"""k
"'more +- -:------ - - - - - - - - - - - - - - - - : ~ o
o
1- r
u
0
ABC
Printable area
0 0 0 0
XYZ 7
o 0 0
v
0 0 0
o 0 0 0
q
more 1) 13 mm (0.51 in.) or fnore with paper 101 to 241 mm (4 to 9.5 in.) wide. 25 mm (0.9 in.) or wide. for rear insertion or 26 mm (1,0 in.) or more for front insertion with paper 254 mm (1 O in.) Figure 1-4 Printable Area for Continuous Paper 1-6
REV.-A Ink ribbon 80-column: Black ribbon cartridge #7753 Film ribbon cartridge #7768 136-column: Black ribbon cartridge #7754 Film ribbon cartridge #7770 Color Black Life 2 million characters at 48 dots/character (black ribbon) 0.2 million characters at 48 dots/character (film ribbon), 80-column 0.3 million characters at 48 dots/character (film ribbon), 136-column Dimensions of ribbon cartridge: 80-column: 293 mm (width) x 34 mm (height) x 72 mm (depth) 11.7 in. (width) x 1.4 in. (height) x 2.9 in. (depth) 136-column: 468.5 mm (width) x 34 mm (height) x 72 mm (depth) 18.4 in. (width) x 1.4 in. (height) x 2.9 in. (depth) Reliability Mean cycles between failures (MCBF): 5 million lines (excluding printhead) Mean time between failures (MTBF): 4000 power-on hours (POH) at 25% duty, 80-column Mean time between failures (M CBF): 6000 power-on hours (POH) at 25% duty, 136-column Printhead life Safety approvals 200 million strokes (black ribbon) 100 million strokes (film ribbon) Safety standards UL1 950 with D3 (U.S. version) CSA22.2#220 EN 60950 (TUV) (European version) Radio frequency interference (RFI) Electrical specifications 120 V version FCC class B (U.S. version) VDE0871 (self-certification) (European version) Rated voltage Input voltage range 120 VAC 103.5 to 132 VAC
Rated frequency range 50 to 60 HZ Input frequency range 49.5 to 60.5 Hz Rated current Power consumption 2.0 A A p p r o x . 5 8 W ( d u r i n g selftest in draft) Insulation resistance 10 Megohms minimun (at 500 VDC between AC line and chassis)
1-7
REV.-A Dielectric strength 1 0 0 0 VAC rms for one minute or $"" 1 2 0 0 VAC rms f o r 220 to 240 VAC 198 to 264 VAC 50 to 60 Hz 49.5 to 60.5 Hz 1.0 A Approx. 58 W (during self-test in draft mode at 10 cpi) Insulation resistance Dielectric strength 10 Megohms minimum (at 500 VDC between AC line and chassis) 1250 VAC rms for one minute or 1500 VAC rms for one second ( b e t w e e n A C l i n e a n d c h a s s i s ) "" Q 5 to 35 degrees C (41 to 95 degrees F), operating 30 to 65 degrees C (22 to 149 degrees F), in shipping container Humidity Resistance to shock 10 to 80 YO RH, operating 5 to 85 % RH, storage 1 G, within 1 ms, operating 2 G, within 1 ms, storage 0.25 G, 55 Hz, maximum, operating 0.50 G, 55 Hz, maximum, storage 80-column: Approx. 8.8 kg (4.0 lb) 136-column: Approx. 11.5 kg (5.2 lb) 80-column: 449 mm (width) x 365 mm (depth) x 171 mm (height) 17.7 in. (width) x 14.7 in. ( d e p t h ) x 6 i n . ( h e i g h t ) 136column: 624 mm (width) x 365 mm (depth) x 171 mm (height) 24.6 in. (width) x 14.7 in. (depth) x 6 in. (height) one second (between AC line and chassis) 220 to 240 V Rated voltage version Input voltage range Rated frequency range Input frequency range Rated current Power consumption
Environmental
c o n d i t i o n s ,,
Temperature
Resistance to vibration
Physical specifications
Weight
.
Dimensions
1-8
REV.-A
1.2.2 Firmware Specifications
Control codes ESC/PTM level ESC/P 2 (EPSON standard code for printers) Printing direction Input data buffer Character code Character tables Bidirectional with logic seeking 8KB, 32KB, 64KB; to change RAM (4A 5A) This printer is able to input buffer capacity 8, 32, or 64KB 8 bits italic character table, PC 437, PC 850, PC 860, PC 863, PC 865 (PC indicates character tables for personal computers.) Fonts and pitches Bit map fonts EPSON Roman EPSON Saris Serif EPSON Courier EPSON Pr@ge EPSON Script EPSON Script C OCR-B EPSON Orator EPSON Orator-S EPSON Draft Scalable fonts EPSON Roman EPSON Saris Serif Printing modes 10, 12, 15, proportional 10, 12, 15, proportional 10, 12, 15 10, 12 10, 12 proportional 10 10 10 10, 12, 15 8 to 32 pt 8 to 32 pt
It is possible to select and mix the following printing modes, except 15 cpi condensed, which is not available. . Print quality (draft or LQ)
q Character pitch (1 O, 12, 15, or proportional) q Condensed
. Double-width . Double-height
q Emphasized
. Double-strike . Italic . Underlined
q Double-underlined q Overscore q Strike-through
. Outline
q Shadow
1-9
REV.-A NOTES: High-speed draft is valid when the printer's status is as follows:
~,. :5, q High-speed draft mode is selected by DIP switch(SVV1-6). q Emphasized mode is not selected. q Condensed mode is not selected. q Draft mode is selected. q No D/L (download) characters are sent to the printer. q The horizontal dot space of characters is not set. q No bit image is sent to the printer. q Super/subscriPt is not selected.
(The printer switches back to normal mode to print emphasized; characters and bit images.) See Tables 1-8 and 1-9. See Table 1-8.
See Table 1-10.
condensed, or download
printing speed printing columns Character rnatriX Character size
See Table 1-10. Table 1:6. Printing (Text Mode) 80/1 36-Column
1
print Pitch
4A Iv f) . 1I
Peinting
Printable Columns 80/1 36
137/233
Character Pitch (cpi) 10 17.1 12 20 15 Invalid.
Printing Speed (CPS) Draft 275 236 330 275 413 LQ 92 157 110 183 138 HSD 300 -- -- -- --
I
12
0 1
96/1 64 160/274 120/204
15
0 1
cpi: Cps: LQ: HSD:
characters per inch characters per second letter quality high-speed draft
~:.: -.. .
1-1o
REV.-A
Table 1-9. Printing (Bit Image Mode) 80/1 36-Column
Pins [ Bit Image Printing Mode I D e n s i t y (dpi) I 60 I Printable Dots I 480/8 16 960/1 632 960/1 632
1920/3264 640/1 088
4;
I Printing Speed (ips)
8 I Single-density
8 1 Dual-density
I
I
120
120
240 80
I
27.5
I
1
I
I
13.8
27.5
13.8 13.8
8 ] Double-speed, dual-density
8 8 Quadruple-density CRT graphics
8 24 24
24
CRT graphics II Single-density Dual-density
CRT graphics II
90 60 120 90 180 360
720/1 224 480/8 16 960/1 632 720/1 224 1440/2448 2880/4896
18.3 ,.! `;; * 2 7 . 5 `" `"" 13.8 18.3 9.2 9.2
24 24
Triple-density Hex-density
dpi: ips:
dots per inch inches per second
1-11
REV.-A Table 1-10. Character Matrix and Character Size Character Size HDD Face Matrix printing Mode 2.0 x 3.1 90 7 x 22 High-speed draft, 10 pitch 1.9 x 3.1 120 9 x 22 Draft, 10 pitch 1.9 x 3.1 120 9 x 22 Draft, 12 pitch 1.0 X 2.3 120 7 X 16 Draft, 15 pitch -- -- 240 Draft, 10 pitch, condensed --120 -- 240 Draft, 12 pitch, condensed 2.2 x 3.1 360 31 x 22 LQ, 10 pitch 1.9 x 3.1 360 27 X 22 LQ, 12 pitch 1.6 X 2.3 360 22 X 16 LQ, 15 pitch -- -- 360 LQ, 10 pitch, condensed -- -- 360 LQ, 12 pitch, condensed 2.6 X 3 . 1 360 Max. 37 X 22 LQ, proportional 1.0 x 3.1 360 Min. 18 X 22
.
,<',, Unit ESC -- 120 120 120 120
SP
180 180 180 180 180
180
e.,,
LQ, proportional, condensed LQ, proportional, super/subscriPt LQ, proportional, super/subscriPt, condensed
-- -- Max. 28 X 16 Min. 12 X 16 --
360 360 360 360 360 360
-- -- 1.8 X 2.3 0.7 X 2.3 -- --
180 180 180
NOTES: q HDD is the horizontal dot density in dots per inch. of the maximum character. This value q Face matrix and character size indicate the size depends on the paper, the ribbon, and other variabIes. q Unit ESC sp (which also can be sent as unit followed by the character string CHR$(&h20)) indicates the minimum length to be added to the right of the character specified with the ESC SP .%. control code. <" m a t r i x . Character width ..,, ,, q -- indicates that printer firmware reshapes the character becomes half of the noncondensed character width.
.
1-12
REV.-A
(Typical draft character) (Typical LQ character)
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Ascender area 1
E F 1 c . F c . . E R I G H T
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Ascender area
L E F T
R I G H T s P A c E
s P A c E
s P A c E
Descender area
Descender area
&
Face width 9 dots
9
<
Face width
>
Character width (CW)
29 dots (Typical LQ, excluding 15 pitch) 15 dots for 15 pitch and condensed LQ
12 dots (10 CPI) 120 DPI 15 dots (12 CPI) 180 DPI 16 dots (15 CPI) 240 DPI 14 dots (condensed 10 CPI) 240 DPI 12 dots (condensed 12 CPI) 240 DPI
<
Character width (CW)
>
36 dots (10 CPI) 360 DPI 30 dots (12 CPI) 360 DPI 24 dots (15 CPI) 360 DPI 21 dots (condensed 10 CPI) 360 DPI 18 dots (condensed 12 CPI) 360 DPI
(Subscript character)
(Subscript character)
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
--
L E F T
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
L' E F T s P A c E
--
R I G H T s P A c E
R I G H T s P A c E
s
P A
c E
--
--
--
--
Figure 1-5. Character Matrix 1-13
REV.-A
1.3 PARALLEL INTERFACE
The specifications for the printer's 8-bit parallel Data format Synchronization Handshaking Signal level Adaptable connector Data transmission timing interface are as follows:
8-bit parallel /STROBE signal BUSY and /ACKNLG signal TTL-compatible 57-30360 (AmphenOl)
or equivalent
See Figure 1-6. , /
BUSy [ ACKNLG DATA STROBE
A
w
Return Pin No. 19 Dir. IN 20 21 22 23 24 25 26 27 28 IN IN IN IN IN IN IN IN
OUT
H
Function
STROBE pulse to read the input data. Pulse width
c
..ZY
Figure 1-6. Data Transmission Timing
Table 1-11 provides the connector pin assignments and describes the signal functions of the 8-bit parallel interface. Table 1-11. Connector Pin Assignments and Signal Functions Pin No. Signal Name STROBE
1
must be more than 0.5 #s. Input data is latched at the falling edge of this signal. Parallel input data to the printer. HIGH level means data 1. LOW level means data O.
2 3 4 5 6 7 8 9 10
DATA 1 DATA 2 DATA 3 DATA 4 DATA 5 DATA 6 DATA 7 DATA 8 ACKNLG
This pulse indicates data has been received and the printer is ready to accept more data. Pulse width is approximately 11 KS. HIGH indicates the printer cannot accept 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 a S. SK-ohm resistor.)
11
12 13
BUSY PE SLCT
29 30 --
OUT OUT
OUT
1-14
Table 1-11. Connector Pin Assignments and Signal Functions (Cont.)
Pin No. 14 Signal Name AUTO FEED-XT Return Pin No. -- Dir. IN Functional Description If LOW when the printer is initialized, the printer automatically performs a line feed upon input of the CR code (auto LF). Not used. GND Chassis GND -- -- -- Ground for twisted pair grounding. Chassis ground level of printer. Not used. GND I NIT ERROR GND -- 16 IN OUT -- Ground for twisted pair grounding. Pulse input for printer initialization (width: 50 KS, minimum, active LOW). LOW indicates an error has occurred in the printer. Ground for twisted pair grounding. Not used. OUT SLCT-IN -- IN Always HIGH. (Pulled up to + 5 V through 3.3 K-ohm resistor.) If LOW when the printer is initialized, DC l/DC3 control is disabled.
15 16 17 18 19 to 3 0 31 32 33 34 35 36
NOTES: 1. "Dir." indicates the direction of the signal flow as viewed from the printer. 2. "Return Pin No." denotes a twisted pair return line. 3. The cable used must be shielded to prevent noise. 4. All interface conditions are based on TTL levels. Both the rise and fall times of all must be less than 0.2 ws. 5. The /AUTOFEED-XT signal can be set to LOW using DIP switch 2-4. 6. The /SELECT-lN signal can be set to LOW using jumper 3. 7. You can perform printing tests, including interface circuit tests, without using external equipment by setting the DATA 1 through DATA 8 pins to the \STROBE signal. signals
1-15
REV.-A
1.4 CONTROL PANEL
There are seven non-lock buttons and 19 indicators on the control panel.
u DRAFT 0 Courier u Roman
m Saris. Sefil 0 Script. C 0 OCR E O Prestige 0 ORATOR U SLOT 0 OratOr-S 0 Script cpi CPI
FONT d
0 POWER 0 DATA 0 MULTI. PART 0 PAPER OUT MICRO FEED
m
= 1 S
10 cP1 o 17
20 C
o !2 CPI n
PITCH m
-
P I 0 PRCPIXTICNAL
F &LncT:Er
-
Figure 1-7. Control Panel
1.4.1 Buttons
(1) Operate switch Use this switch to turn on the po,wer supply to the printer. (2) PAUSE button Press this button to toggle the printer between the PAUSE condition (in which there is no printing or paper feeding and the printer does not accept data) and the RUNNING condition. Press the PAUSE and ALT buttons at the same time to clear the input buffer and perform a software initialization. Pressing the PAUSE and ALT buttons has the same effect as the ESC @ command.
(3) LINE FEED/FORM FEED button Press this button to perform a line feed. Hold it down to perform a
form feed, whether the printer is in the PAUSE or the RUNNING condition. Press this button and the ALT button at the same time to use the micro reverse feed function. (4) LOAD/EJECT button Press this button to load or eject paper. See Section 1.6.8, Paper Loading and Ejection. Press this button and the ALT button at the same time to use the micro forward feed function. (5)
TEAR OFF / BIN
l/ BIN 2 button When the printer is in tractor feed mode, press this button to advance {" `",
continuous paper to the tear-off position. The TEAR OFF indicator light comes on. When the printer is in friction feed mode, press this button to select bin 1 or bin 2 of the cut-sheet feeder. The indicator light of the selected bin comes on. (6) ALT button Use this button with other buttons to perform a variety of functions. (7) FONT button Press this button to select a font. Press it again to select the next font. The FONT indicator light shows the currently selected font. (8) CONDENSED button Press this button to select normal or condensed printing. NOTE: FONT and CONDENSED button selections are stored as defaults and take effect when the printer is initialized.
1-16
REV.-A
1.4.2 Indicator Lights
(1) OPERATING (green) Lit when the printer's operate switch is on and AC power is supplied.
(2) PAUSE (orange)
Lit when the printer is in PAUSE mode. In PAUSE mode, there is no printing or paper feeding and the printer does not accept data.
(3) TEAR OFF (orange)
Lit when the page is advanced to the tear-off position. (4) DATA (orange) Lit when the printer has received data from the host machine. (5) PAPER OUT (red) Lit when the paper-out detector detects that there is no paper. See Section 1.6.3, Paper-out Detection and Form Override Function. (6) MULTI-PART (green) Lit when the paper-thickness lever is positioned at the fourth step or higher. (7) BIN 1 (green) Lit when bin 1 is selected. (8) BIN 2 (green) Lit when bin 2 is selected. (9) FONT (green) -Draft, Courier, Roman, Saris Serif, Prestige, Script, Script C, Orator, Orator-S, OCR-B These indicator lights show the currently selected font. (10) CONDENSED (green) Lit when condensed mode is selected.
1-17
REV.-A
1.5 DIP SWITCHES AND JUMPERS
This section describes the DIP switches and jumpers of the LQ-870/l 170.
1.5.1 DIP Switches
The printer has two banks of DIP switches located on the control panel. Tables 1-12 through 1-15 describe the functions of the DIP switches. The status of the DIP switches is read only at power-on or upon receipt of the /l NIT signal.
Table 1-12. DIP Switch Set 1 (SW1)
No. Description ON OFF Factory Setting ON ON ON I OFF OFF OFF OFF
1
2 3 International and PC character set selection I See Table 1-14. Graphic Unidir. Invalid Invalid I Italic Bidir. Valid Valid
4 I Character table selection 5 6 7 Graphics direction" High-speed draft mode Input buffer
t
."
8 I One-inch SkiI) continuous DaDer
Table 1-13. DIP Switch Set 2 (SW2)
No. Description Page length of continuous paper Auto tear-off ON OFF Factory Setting OFF OFF OFF
1
2 3
See Table 1-15. ON OFF
4 I Auto line feed
~-. .,
1-18
REV.-A
Table 1-14. International and PC Character Set Selection 1-1
ON ON ON ON OFF OFF OFF OFF 1-2 ON ON OFF OFF ON ON OFF OFF 1-3 ON OFF ON OFF ON OFF ON OFF Country Us. France Germany U.K. Denmark 1 Sweden Italy Spain 1 Pc 437 850 860 863 865 (437) (437) (437)
`
I
II
1-
I
When you turn on DIP switch 1-4 and use ESC + O to select the italic character table, the country setting becomes U.S. When you turn off DIP switch 1-4 and use ESC t 1 to select the graphics character table, the PC setting becomes 437.
Table 1-15. Page Length
2-1 OFF ON OFF ON 2-2 OFF OFF ON ON Page Length 11 inches 12 inches 8.5 inches 70/6 inches
1.5.2 Jumpers
If jumper 3 is connected to GND, the /S LCT-lN signal is set to LOW and the printer ignores DC l/DC3 control.
1-19
REV.-A
1.6 OPERATING INSTRUCTIONS
This section describes the self-test, hexadecimal dump function, error states, printer initialization, and buzzer operation.
1.6.1 Self-Test
.
To run the self-test in draft mode, turn on the printer while pressing the LOAD/EJECT button. To run the self-test in LQ mode, turn on the printer while pressing the LINE FEED/FORM FEED button. You can press the PAUSE button to stop or start the self test. When you are satisfied with the self test, press the PAUSE button to stop it and then turn off the printer. The firmware revision number is printed on the first line of the self-test, followed by the current DIP switch settings.
Xxxxxx
Country/PC U.s. o.
France
Ge r IBd n y U.h. r)e rlnld. r k S (4 & d C i I 1 t a ] `J "s () J 1 I , `c 437 . .. [ ,
Swl-1 1 - 2 1 - 3 1 - 4 . `on o n o n off o n o n o f f off () n off on of f (.> n of f off of f o t f 0 n o n of f c! t i o n (It t of t u { t" o I t o n i) f f ( ~t t c1 t i o f f o f i' on on on :-f II e
High s p e e d d r a f t SW1-6 of i Va 1 i d I rival id on Receive buffer SW1-7 Valid off o 1"1 I il v a 1 i d SM1-8 1 inch skip off I nva 1 id ,, , I ~ d ,,, , , \ Swz-1 2 - 2 off off
t'
Figure 1-8. Self-Test
1.6.2 Hexadecimal Dump Function
To enter hexadecimal dump mode, turn on the printer while pressing both the LOAD/EJECT and the LINE FEED/FORM FEED buttons. In hexadecimal dump mode, the printer prints the hexadecimal representation of the input data along with the corresponding ASCII characters. This function is useful for checking the data the printer receives from the host. If input data is a control code instead of a character code, a period (.) is printed in the ASCII column,
16 ~~ 16 20 20 54 6~ 70 6C 75 60 70 69 73 20 OA 20 20 52 00 IB 74 01 IB 36 12 IB 50 IB 70 00 68 69 73 20 69 ?3 20 61 6E 20 65 78 b 1 65 20 6F 66 20 61 20 64 b 1 74 61 20 64 20 70 72 69 6E 74 6F 75 74 2E 20 54 68 66 65 61 74 75 72 65 20 6D 61 6B 65 73 20 20 20 69 74 20 65 61 73 79 20 66 6F . @ . R . .t. .6. .P. P. T h i s i s an e x a mple of a data d ump printout. Th i s featu r e m a k e s . i t e a s y fo
~., ., .
Figure 1-9. Hexadecimal Dump
1-20
REV.-A
1.6.3 Paper-Out Detection and Form Override Function
The paper-out detector is attached to the paper end, the printer first performs a form the PAPER OUT indicator light comes on, becomes LOW, and the printer enters the printer mechanism. When the paper-out detector senses a override. If paper loading fails, the BUSY signal goes HIGH, the interface PE signal becomes HIGH, the \ERROR signal PAUSE condition.
The form override function ignores the paper out and allows the printer to print additional lines after a paper out is detected. After you load paper and press the PAUSE button, the printer returns to the RUNNING condition and printing begins again. The printer enters the paper-out state only when a paper out is detected after the printer performs a paper loading operation,
1.6.4 Error Conditions
If any of the following error conditions are detected, the printer automatically enters the PAUSE condition.
q The home position is not detected at printer mechanism initialization. q The home position is detected during printing.
. The PAUSE button is pressed and the printer enters the PAUSE condition.
q A paper out is detected after the printer performs a paper loading operation.
If the parallel interface is selected, the following interface signals are output to indicate the error and to stop data transmission:
q The BUSY signal becomes HIGH. . The /ERROR signal becomes LOW. q No /ACKNLG pulse is sent.
1.6.5 Buzzer Operation
The buzzer sounds under the following conditions:
q A paper-out error is detected. (The buzzer beeps three times for 0.1 seconds, with 0.1 second
interval s.)
q Abnormal carriage movement is detected. (The buzzer beeps five times for 0.5 seconds, with 0.5
second intervals.) . A control panel setting is accepted. (The buzzer produces one O. l-second beep.)
1-21
REV.-A
1.6.6 Printer Initialization
There are three types of initialization: hardware, software, and control panel. (1) Hardware initialization This type of initialization takes place when you turn on the printer (and the AC power cord is plugged in) or when the ANIT signal is received. When the printer is initialized, it performs the following actions: (a) Initializes the printer mechanism. (b) Clears the input data buffer. (c) Clears the downloaded character set. (d) Clears the print buffer. (e) Returns the printer settings to their default values.
(2) Software
initialization
,,., L
."
The ESC @ command initializes the printer but does not perform functions (a), (b), and (c) above. The last SelecType settings still take effect.
(3) Control panel initialization
Pressing the PAUSE and ALT buttons at the same time initializes the printer but does not perform functions (a) and (c) above. The last SelecType settings still take effect.
1.6.7 Default Values
When the printer is initialized, the following default values take effect: Page position Left and right margins Line spacing Vertical tabs Horizontal tabs Family number of typestyle Download characters Character spacing Printing effects Condensed printing Printer condition The current paper position becomes the top-of-form position. Released 1/6 jnch Cleared Every eight characters (relative) Last font selected from the control panel Kept during software initialization Cleared during hardware initialization Last setting selected from the control panel Cleared except condensed printing Last setting selected from the control panel RUNNING (not PAUSE)
`f
,,.7,,
~$
1-22
REV.-A
1.6.8 Paper Loading and Ejection
The release lever can disengage the pull tractor drive mechanism. This provides the printer with the following paper handling features: Automatic single-sheet loading without the cut-sheet feeder Move the release lever to the friction feed position and place the sheet along the top or front paper guide. A few seconds later, the printer automatically advances the sheet to the top-of-form position and enters the RUNNING condition. Automatic single-sheet loading and ejection with the cut-sheet feeder Move the release lever to the friction feed position and load single-sheet paper into the hopper of the cut-sheet feeder. Press the LOAD\ EJECT button to load a sheet to the top-of-form position. If a paper out is detected before printing starts, the printer automatically loads another sheet to the top-of-form position. Continuous paper loading and ejection (backout) Move the release lever to the REAR PUSH / FRONT PUSH position and load the paper onto the tractor unit. Press the LOAD/EJECT button to load paper to the top-of-form position. If a paper out is detected before printing starts, the printer automatically advances the paper to the top-of-form position. If you press the LOAD/EJECT button after you load continuous paper, the printer moves the paper backward to the push tractor. To back out several pages, press the LOAD/EJECT button several times. Each time you press the LOAD/EJECT button, the printer reverse feeds one page. When the paper is at the current setting for the top-of-form position, the top-of-form adjustment function is valid for the setting a new top-of-form position. At this time, pressing the LOAD/EJECT button moves the paper forward and pressing the LINE FEED/FORM FEED and ALT buttons at the same time moves the paper backward. The adjusted top-of-form position for continuous paper is saved in EEPROM, but the setting for single-sheet paper is not saved.
1.6.9 Tear-off Function
Auto tear off
You enable the auto tear-off function by setting a DIP switch. When this function is enabled and the release lever is in the tractor position, the paper automatically advances to the tear-off position if the input data buffer is empty and the printer is in the RUNNING condition. The TEAR OFF indicator light comes on to indicate that you can use the LOAD/EJECT and LINE FEED/FORM FEED buttons with the ALT button for backward and forward micro feed adjustment. Using micro feed, adjust the paper to meet the tear-off edge. Once the tear-off position is set, this setting remains valid even after the printer is turned off or initialized. If subsequent data is sent to the printer, the paper automatically returns to the original position and printing starts. If you press the PAUSE button while the printer is advancing the paper to the tear-off position, the paper returns to the original position and the printer enters the PAUSE condition.
1-23
REV.-A
Short tear off f
To use the short tear-off function, press the TEAR OFF button. The release lever must be in the tractor "position. The paper advances to the tear-off position, whether the printer is in the PAUSE or the RUNNING condition. The TEAR OFF indicator light comes on to indicate that you can use the LOAD/EJECT and LINE FEED/FORM FEED buttons with the ALT button for backward and forward micro feed adjustment. Using micro feed, adjust the paper to meet the tear-off edge. Once the tear-off position is set, this setting remains valid even after the printer is turned off or initialized. If subsequent data is sent to the printer and the printer is in the RUNNING condition, the paper automatically returns to its original position and printing starts. If you press the TEAR OFF button again while the printer is advancing the paper to the tear-off position, the paper returns to its original position whether the printer is in the PAUSE or the RUNNING condition.
1.6.10 Paper-Thickness Lever Operation
You must set the paper-thickness lever (the adjust lever) to the proper position for the thickness of your paper. If this lever is set at the fourth step or higher, printing speed is reduced and printhead energy is increased. . .
Table 1,-16. Paper-Thickness Lever Positions .,
(>.,
I
Lever
O (2nd step) 1 (3rd step) 2 (4th step)
3 (5th step)
I
Position Paper Thickness
0.06 to 0.12 mm (.0024 to .0047 in.) 0.13 to 0.17 mm (.0051 to .0067 in.) 0.18 to 0.25 mm (,0071 to .010 in.)
0.26 to 0.32 mm (.01 O to .013 in.)
I
NOTE: If the printing density becomes lighter, move the adjust lever position one step higher.
``0siti0n(2Yp)~
Figure 1-10. Paper-Thickness Lever Positions
1-24
REV.-A
1.6.11 Protection during Heavy Duty Printing
This printer has a protection function to prevent the printhead value, printing stops automatically. When the printhead decreases, print speed increases to the normal speed. If the printhead decreases. If the voltage supplied to the head drive circuit drops below its minimum limit as a result of heavy duty printing, printing is interrupted immediately. When the power supply voltage increases to a certain value, the remaining print line is printed at half speed. this protective action occurs when half or more of the wires are activated continuously. temperature continues to increase at the lower speed, the printer stops printing. The printer stops or resumes printing as the printhead temperature increases or from overheating and to stop printing when the head driver voltage drops. If the temperature of the printhead exceeds the maximum allowed temperature drops to a certain value, printing temperature resumes. At first, printing resumes at a lower print speed. However, as the printhead
1-25
REV.-A
1.7 MAIN COMPONENTS
The main components of the LQ-870/l 170 are designed for easy removal and replacement during maintenance and repair. The main components are: 1) C060 MAIN board: the main control board; the CPU on this board controls all the printer's main functions.
2) C060 PNL board:
the control panel board.
3) C060 PSB/PSE board: the power supply board. the drive board. 4) C060 DRV board: 5) M-5D 10\5D60: the printer mechanism.
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Figure 1-11. LQ-870/l 170 Component Layout
1.7.1 C060 MAIN Board (Main Control Circuit Board)
The C060 MAIN board consists of a TMP90C041 N 8-bit CPU, an E05A494B gate array, a PROM (5 12K), a PSRAM (256 K), a mask ROM (character generator, 2M), and an EEpROM.
Gate Array E05A49B (4B)
, CPU TMP90C 041 N (2C)
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EEPRO
CGROM ( 1A)
P-ROM (3A)
TTL (6A)
MASK ROM M65256 (4A)
Figure 1-12. C060 MAIN Board
1-26
REV.-A
1.7.2 C060 PNL Board (Control Panel Circuit Board)
The C060 PNL board is the LQ-870/l 170 control panel, which includes the buttons, indicator LEDs, and DIP switches.
Figure 1-13. C060 PNL Board
1.7.3 C060 PSB/PSE Board (Power Supply Circuit Board)
The power supply unit consists of a switching regulator circuit that converts the AC line voltage to the DC voltages (for example, +35 V and +5 V) used by the printer. The C060 PSB board is the 120 V input type and the C060 PSE board is 220/240 V input type.
Figure 1-14. C060 PSB/PSE Board
1-27
REV.-A
1.7.4 C060 DRV Board (Head Control Circuit Board)
The C060 DRV board consists of a SLA7024M hybrid IC, a PU 1501, and a F'U4 135 transistor array.
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Figure 1-15. C060 DRV Board
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1.7.5 M-5D1 O/5D60 Printer Mechanism
The M-5D 10/5D60 printer mechanism was developed specifically for use with LQ-870/l 170. Its components include the carriage motor, carriage mechanism, paper-feed motor, paper-feed mechanism, ribbon-feed mechanism, printhead, and sensors. The printer mechanism provides four ways to insert paper.
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Figure 1-16. M-5 D10/5D60 Printer Mechanism
1-28
REV.-A
1.7.5 Housing
The LQ-870/l 170 housing consists of the upper, lower, and front cases. The front case houses the control panel board. The lower case contains the printer mechanism, main control circuit board, and power supply circuit board.
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(LQ-870) Figure 1-17. Housing
(LQ-I 170)
1-29
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CHAPTER 2 OPERATION PRINCIPLES
2.1 PRINTER MECHANISM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.1 Printhead Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.2 Carriage Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.1.3 Paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 2.1.3.1 Paper Feeding Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.1.3.2 Paper Insertion Entrances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2.1.4 Ribbon Advance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.2 POWER SUPPLY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12 2.2.1 Power Supply Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2.2.2 Supply Circuit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12 2.3 CONTROL CIRCUIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.3.1 Control Circuit Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.3.2 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2.3.3 Sensor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2.3.4 Carriage Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19 2,3.5 Paper Advance Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 2.3.6 Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 2.3.7 Parallel Interface Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 2.3.8 EEPROM Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22
LIST OF FIGURES
Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 2-5. Figure 2-6. Figure 2-7. Figure 2-8. Figure 2-9. Figure 2-10. Figure 2-11. How the Printhead Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Carriage Movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Moving the Paper-Thickness Adjustment Lever . . . . . 2-2 Friction Feeding Using the Top Entrance . . . . . . . . . . . . . . . . . . 2-3 Push Tractor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4 Pull Tractor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Push-Pull Tractor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Moving the Release Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 Friction Feeding Using the Top Entrance . . . . . . . . . . . . . . . . . . 2-6 Push Tractor Feeding Using the Rear Entrance . . . . . . 2-7 Pull Tractor Feeding Using the Rear Entrance . . . . . . . . 2-7
Figure 2-11-1. Push-Pull Tractor Feeding Using the Rear Entrance . . 2-7 Figure 2-12. Pull Tractor Feeding Using the Bottom Entrance . . . 2-8 Z.i
REV.-A Figure 2-13. Figure 2-14. Friction Feeding Using the Front Entrance . . . . . . . . . . . . . . . 2-9 Pull Tractor Feeding Using the Front Entrance . . . . . . . 2-9
Figure 2-14-1. Push Tractor Feeding Using the Front Entrance . . . . 2-10 Figure 2-14-2. Push Pull Tractor Feeding Using the Front Entrance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . . 2-10 Figure 2-15. Figure 2-16. Figure 2-17. Figure 2-18. Figure 2-19. Figure 2-20. Figure 2-21. Figure 2-22. Figure 2-23. Figure 2-24. Figure 2-25. Figure 2-26. Figure 2-27. Ribbon Advance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 . Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 Data Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15 . Reset Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 /RESET Signal Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-18 Sensor Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 Carriage Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 Paper Advance Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 Head Drive Signal Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 Parallel Interface Circuit ................................................o 2-22 EEPROM Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
LIST OF TABLES
Table 2-1. Table 2-2. Table 2-3. Table 2-4. Table 2-5. Table 2-6. Paper Advance Methods and Paper Entrances . . . . . . . . . 2-3 Ribbon Advance Gear Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 Power Supply Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Power Supply Output Voltages and Applications . . . . 2-12 Functions of the Main IC and Circuits . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 Carriage Motor Drive Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 .
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REV.-A
2.1 PRINTER MECHANISM OPERATION
This section describes the Model 5D 10/5D60 printer mechanism and explains how it works. The Model 5D 10\5D60 printer mechanism features a 24-pin impact dot printhead for serial printing. The printer mechanism has four main parts: the printhead mechanism, the carriage movement mechanism, the paper advance mechanism, and the ribbon advance mechanism. The following sections describe these parts.
2.1.1 Printhead Mechanism
The printhead mechanism consists of the printhead itself, the ink ribbon, and the platen. The printhead contains 24 wires in a zigzag arrangement in two rows of 12. A drive coil is provided for each of these wires to make the wires move in and out of the printhead and print dots independently of each other. The four steps below describe the basic way that the wires are driven. 1. The control circuit outputs the drive signal to the printhead drive circuit. This changes the printhead drive voltage and current flows through the corresponding printhead coil. The coil acts as a solenoid and generates a magnetic force. 2. This induced force causes the plate to approach the coil rod and the associated dot wire is rapidly ejected to impact on the platen. 3. The dot wire presses the ink ribbon up against the paper as it hits the platen and, in this way, prints a dot on the paper. 4 As soon as the current through the coil is switched off, the force induced in the coil rod stops. The plate then returns to its original position (its position before the coil was energized) through the action of the plate spring. After the dot wire hits the platen, the rebounding force of hitting the platen works with the wire return spring to pull the wire back to its original position in relation to the plate.
Platen Dot Wwe Wwe Resetting Spring Stopper Ribbon Mask
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Act~ating Plate Spring
Figure 2-1. How the Printhead Works Figure 2-1 shows how the printer mechanism prints a single dot. The printhead tends to heat up after a period of continuous printing. To minimize the possibility of the dot wire drive coils in the printhead overheating and causing a loss of performance, the printhead is equipped with a thermistor that detects the temperature of the printhead. When this thermistor detects changes in the printhead temperature, the voltage signal changes. The control circuit reads this signal change for feedback control. 2-1
REV.-A
2.1.2 Carriage Movement Mechanism
A timing belt is connected to the carriage on its lower side. With the printhead installed, this carriage moves in either direction along the carriage guide shaft. The carriage is driven by the carriage motor, a stepping motor that drives the timing belt via the belt drive pulley. The home-position sensor detects when the carriage is in the home position.
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Carriage Carriage Guide Shaft
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Figure 2-2. Carriage Movement The paper-thickness adjustment lever allows the printer to use paper of different weights (or thicknesses). The user can change the platen gap on the carriage guide shaft by moving this lever. Changing the position of the lever turns the carriage guide shaft and moves the carriage either toward higher or away from the platen. Moving the paper-thickneS.S adjustment Iever to the fourth position or of the slows the printing speed to protect the printhead. The PG sensor reads the current position paper-thickness adjustment Iever.
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Shaft
PG Sensor Figure 2-3. Moving the Paper-Thickness Adjustment Lever
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2-2
REV.-A
2.1.3 Paper Advance Mechanism
The printer uses friction feeding to advance single-sheet paper and tractor feeding to advance continuous paper. There are three ways to advance paper using a tractor feed mechanism: using the push tractor, using the pull tractor, or using the push and pull tractors together. During normal operation, the printer has one tractor that functions as either a push or a pull tractor, depending on where it is attached to the printer. To use the p'ush-pull tractor feed method, the standard tractor and the optional tractor must be installed. There are four ways to insert paper into the printer. The printer uses different paper insertion entrances and paper paths for different types of paper. Table 2-1 lists which paper insertion entrances you can use with each paper advance method. Table 2-1. Paper Advance Methods and Paper Entrances Paper Insertion (Paper Paths) Paper Advance Method Friction Push Tractor Pull Tractor Push-pull Tractor Rear No OK OK OK Front OK OK OK OK Bottom No No OK No Top OK No No No
2.1.3.1 Paper Feeding Mechanisms This section describes how the friction and tractor feed mechanisms advance paper in the printer. Friction Feed Method The paper is held between the platen and the paper advance roller, and between the paper eject roller and the paper eject unit cover. The paper-feed pinion gear, turning in the direction of the black arrow, drives the paper-feed reduction gear. The paper-feed reduction gear turns the platen gear, paper-feed rollers, and top paper tension roller. The paper then advances in the direction of the white arrow. The paper advance roller spring holds the paper against the platen. Setting the release lever to the tractor feed position releases this pressure and frees the paper. Figure 2-4 illustrates friction feeding when you insert paper into the top paper entrance. Paper (Cut Sheet)
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Paper Tension Roller
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Paper F