LQ-1170 - Diagramasde.com

LQ-1170
24-PIN DOT MATRIX PRINTERS
TM-LQ8/1170
LQ-870/1170
SERVICE MANUAL
EPSON
T$$$ Printed on recycled paper.
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
REV.-A
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 THATTHE 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 /JP 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.
REV.-A
PREFACE
This manual describes functions, theory of electrical and mechanical
operations, maintenance, and repair of the LO-870/1170.
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 -
Describes the theory of printer operation.
Chapter 3 -
Includes a step-by-step guide for product disassembly and
assembly.
Chapter 4 -
Includes a step-by-step guide for adjustment.
Chapter 5 -
Provides Epson-approved techniques for troubleshooting.
Chapter 6 -
Describes preventive maintenance techniques and lists
lubricants and adhesives required to service the equipment.
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The contents of this manual are subject to change without notice
- iv -
Revision Level
Date
Revision
I
1~
1st printing
I----%ViSC?d
2ndprhting
I
I
I
7/23/91
10/g/91
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I
3/17/92
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REV.-A
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
- vi -
6/4/93
CHAPTER 1
GENERAL DESCRIPTION
1.1 FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 Firmware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 PARALLEL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 CONTROL PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.1 Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.2 Indicator Lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 DIP SWITCHES AND JUMPERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.1 DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.52 Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.1 Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2 Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.3 Paper-out Detection and Form Override Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.4 Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.5 Buzzer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.6 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.7 Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.8 Paper Loading and Ejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.9 Tear-off Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.10 Paper-Thickness Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.11 Printer Protection for Heavy Duty Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 MAIN COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.1 C060 MAIN, C061 MAIN, and C060 MAIN B Board (Main Control Circuit Board) . . . . . . . . . . . . . . .
1.7.2 C060 PNL Board (Control Panel Circuit Board). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.3 C060 PSB Board (Power Supply Circuit Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.4 C060 DRV Board (Head Control Circuit Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.5 M-5D10/5D60 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.6 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l-i
1-1
1-3
1-3
1-9
1-14
1-16
1-16
1-17
1-18
1-18
1-19
1-20
1-20
1-20
1-21
1-21
1-21
1-22
1-22
1-23
1-23
1-24
1-25
1-26
1-27
1-28
1-28
1-29
1-29
1-30
6/4/93
LIST OF FIGURES
Figure 1-1. Exterior View of the LQ-870 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-2. Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-3. Printable Area for Single-Sheet Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-4. Printable Area for Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-5. Character Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-6. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-7. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-8. Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-9. Hexadecimal Dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-10. Paper-Thickness Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-11. LQ-870/1170 Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-12. C060 MAIN, C061 MAIN, and C060 MAIN B Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-13. C060 PNL Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-14. C060 PSB Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-15. C060 DRV Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-16. M-5D10/5D60 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-17. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1-3
1-6
1-6
1-13
1-14
1-16
1-20
1-20
1-24
1-26
1-27
1-28
1-28
1-29
1-29
1-30
LIST OF TABLES
Table 1-1. Optional Interface Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
Table 1-2. Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
Table 1-3. Specifications for Single-Sheet Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4
Table 1-4. Specifications for Single-Sheet Multi-Part Forms (Carbonless Duplicating Paper) . . . . . . . . . . . . . . 1-5
Table 1-5. Specifications for Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
Table 1-6. Specifications for Envelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
Table 1-7. Specifications for Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
Table 1-8. Printing (Text Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-10
Table 1-9. 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-14
Table 1-12. DIP Switch Set 1 (SW1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-18
Table 1-13. DIP Switch Set 2 (SW2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-18
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
Table 1-17. Main Boards and Driver Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-26
l-ii
REV.-A
1.1 FEATURES
The LQ-870/1170 is a small, light-weight, low-cost printer that provides advanced paper
handling and is compatible with The LQ-510/550. The printer’s main features are:
I
0 Use of ESC/P 2 control codes
The printer can print fonts in various point sizes and receive and print raster graphic images.
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Compatibility with LQ and SQ series printers
0 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 10 cps (LO, 12 cpi)
92 cps (LO, 10 cpi)
0 Multiple fonts resident in the printer: nine letter quality (LQ) fonts (Roman, Sans Serif, Courier,
Prestige, Script, OCR-B, Script-C, Orator, and Orator-S) and one draft font
0 Clear, easy-to-read printing using standard EPSON fonts
0 Selection of fonts, condensed printing, and the cut-sheet feeder (CSF) bin using control panel buttons
0 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
0 Easy handling of single-sheet paper with the optional cut-sheet feeder
0 Optional tractor that can be used to create a push-pull tractor feeding
0 Optional interface cards
The LQ-870/1170 is equipped with the standard EPSON 8-bit parallel interface. The optional
interface cards ensure compatibility with a wide variety of computers. Table l-l Lists the optional
interface cards, Table 1-2 lists the optional units available for the LO-870/1170, and Figure l-l
shows an exterior view of the LO-870/1170.
Table l-l Optional Interface Cards
Model No.
Description
C82305’
Serial interface card (inch screw) 1
C82306’
Serial interface card (milli screw) 1
C82307’
32KB serial interface card (inch screw)
C82308’
32KB serial interface card (milli screw)
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1-1
REV.-A
*The last digit in each part numbers above, represented by an asterisk (‘), varies depending on the
country.
l.You cannot use the printer with the following baud rates: 1800, 200, 134.5, 1 10, or 75 bps.
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NOTE: Refer to the “Optional Interface Technical Manual” for more information on the optional
interface cards.
Table 1-2. Optional Units for LQ-870
Description
1 Model No. /
C80637’
Single-bin cut-sheet feeder
C80638‘
High-capacity cut-sheet feeder
I C80020
1 Tractor
7753
Fabric ribbon cartridge
7768
Film ribbon cartridge
Table 1-2-1. Optional Units for LQ-1170
Description
1 Model No. /
C80639'
Single-bin cut-sheet feeder
C80640’
High-capacity cut-sheet feeder
I C8002 1
r7754
7770
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I
Tractor
I
Fabric ribbon cartridge
I
Film ribbon cartridge
*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-870/1170.
1.2.1 Hardware Specifications
Printing method
Serial, impact, dot matrix
Pin configuration
24 wires; 12 x 2 staggered, diameter 0.2 mm (.008 in.)
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)
Line spacing
Push-pull tractor feeding (front and rear paper entrances)
1/6 inch, 1/8 inch, or programmable in units of 1/360 inch
Paper insertion
Friction feeding: front or top paper entrance
Tractor feeding: front, bottom, or rear paper entrance
Paper feed speed
Friction feeding without cut-sheet feeder:
59.0 msec for a 1/6-inch line feed
3.6 inches per second (ips) during continuous feeding
Friction feeding with cut-sheet feeder:
62.7 msec for a 1/6-inch line feed
3.3 ips during continuous feeding
Tractor feeding:
64.1 msec for a 1/6-inch line feed
3.0 ips during continuous feeding
NOTE: Paper handling precautions are listed below.
1-3
REV.-A
Friction feeding precautions
0 Move the release lever to the FRICTION position.
0 Load paper into the front or top paper entrance.
0 Do not use continuous paper.
0 Do not perform any reverse feeds within the top 8.5 mm (.34 in.) or bottom 22 mm (.87 in.) of
the paper.
0 Do not perform reverse feeds greater than l/6 inch after a paper end is detected.
0 Use the paper tension unit.
0 Load single-sheet multi-part forms only into the front paper entrance.
0 Use only carbonless multi-part forms.
Push
0
0
0
0
0
l
0
0
tractor feeding precautions
Move the release lever to the REAR PUSH/FRONT PUSH position.
Load paper into the rear paper entrance.
Release the friction-feed mechanism.
Multi-part forms must be spot pasted beyond the perforation between the sprocket holes.
Use only carbonless multi-part forms.
Use the paper tension unit.
Do not perform reverse feeds greater than l/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
0 Move the release lever to the REAR PUSH/FRONT PUSH position.
l Load paper into the front, rear, or bottom paper entrance.
0 Release the friction-feed mechanism.
l Remove the paper tension unit and attach the pull tractor.
0 Make sure there is no slack in the paper between the platen and the pull tractor.
0 Carefully align the pull tractor and push tractor sprockets.
l Paper for multiple copies must be spot pasted beyond the perforation between the sprocket holes.
0 Use only carbonless multi-part forms.
0 Do not perform reverse feeds greater than l/6 inch.
0 Do not perform reverse feeds after a paper end is detected.
Pull
0
0
0
0
0
0
0
tractor feeding precautions
Move the release lever to the PULL position.
Load paper into the front or bottom paper entrance.
Release the friction feed mechanism.
Remove the paper tension unit and attach the pull tractor.
Paper for multiple copies must be spot pasted beyond the perforation between the sprocket holes.
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 (80/136 column)
Width
Length
Thickness
Weight
Quality
148 to 257/420 mm (5.8 to 10.1/16.5 in.) (top insertion)
182 to 257/364 mm (7.2 to 10.1/14.3 in.) (front insertion)
364 mm (14.3 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/l 36 column)
Width
Length
Thickness
Weight
Quality
Copies
182 to 216/364 mm (7.2 to 8.5/l 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/mZ) single sheets
12 to 15 lb (40 to 58 g/mZ) each
Carbonless duplicating paper
Four sheets (one original and three copies)
Table l-5. Specifications for Continuous Paper (80/l 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 9 1 g/m2)
Bond paper, standard paper, air mail
Not available
NOTES: 0 Printing on envelopes is available only at normal temperatures.
0 Load envelopes only into the top paper entrance.
0 Keep the longer side of the envelope horizontal when you insert it.
0 Place the left edge of a no. 6 envelope at the sheet guide mark.
Table 1-7. Specifications for Labels
Label size
Thickness
Copies
2 l/2 in x 15/16 in.
4 in. x 15/16 in.
4 in. x 7/l 6 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 i n . ) - t o t a l
Not available
NOTES: 0 Printing on labels is available only at normal temperatures.
0 Only use labels on continuous backing paper with sprocket holes for tractor feeding.
0 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 (0.0 1 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 10% and 80% RH.
0 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.
148-257 m m (5.8-10 1-j
top Insertion
front lnsertlon 182-257 mm (7 Z-10.1”)
<
_
r
‘1)
L
Prtntable area Max. 203 2 mm I8 I” 1
3
7-
A-1)
I
ABC
XYZ
-i
l 1)
3.0 mm (0.12 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 .O in.) or more for front insertion when paper
width is 257 mm (10.1 in.).
l
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
0
0
0
0
0
0
Prmlable
area
I
4
XYZ
-l
9mmtO 35”)
or more
----o_
0
+
9mm10 35”)
or more
0
7Gq;
+
I
Prmtable
area
l
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1) 13 mm (0.51 in.) or more with paper 101 to 241 mm (4 to 9.5 in.) wide. 25 mm (0.9 in.) or more
for rear insertion or 26 mm (1 .O in.) or more for front insertion with paper 254 mm (10 in.) wide.
Figure 1-4 Printable Area for Continuous Paper
1-6
REV.-A
Ink ribbon
80column:
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)
1 1.7 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 (MCBF): 6000 power-on hours (POH) at 25% duty,
136-column
Printhead life
200 million strokes (black ribbon)
Safety approvals
Safety standards UL1950 with D3 (U.S. version)
100 million strokes (film ribbon)
CSA22.2#220
EN 60950 (TUV) (European version)
Radio frequency
interference (RFI)
Electrical specifications 120 V version
FCC class B (U.S. version)
VDE087 1 (self-certification) (European version)
120 VAC
Rated voltage
Input voltage range
103.5 to 132 VAC
Rated frequency range 50 to 60 Hz
Input frequency range 49.5 to 60.5 Hz
2.0 A
Rated current
Power consumption
Approx.58 W (during selftest in draft)
‘Insulation resistance
10 Megohms minimun (at
500 VDC between AC line
and chassis)
1-7
REV.-A
Dielectric strength
1000 VAC rms for one minute or
1200 VAC rms for one second
(between AC line and chassis)
220 to 240 V
Rated voltage
220 to 240 VAC
Input voltage range
198 to 264 VAC
Rated frequency range
50 to 60 Hz
Input frequency range
49.5 to 60.5 Hz
version
Rated current
1.0 A
Power consumption
Approx. 58 W (during self-test in
draft mode at 10 cpi)
Insulation resistance
10 Megohms minimum (at 500 VDC
between AC line and chassis)
Dielectric strength
1250 VAC rms for one minute or
1500 VAC rms for one second
(between AC line and chassis)
Environmental conditions
Temperature
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
10 to 80 % RH, operating
5 to 85 % RH, storage
Resistance to shock
1 G, within 1 ms, operating
2 G, within 1 ms, storage
Resistance to vibration 0.25 G, 55 Hz, maximum, operating
0.50 G, 55 Hz, maximum, storage
Physical specifications
Weight
80-column:
Approx. 8.8 kg (4.0 lb)
136-column:
Approx. 1 1.5 kg (5.2 lb)
Dimensions
80-column:
449 mm (width) x 365 mm
(depth) x 17 1 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 17 1 mm (height)
24.6 in. (width) x 14.7 in. (depth)
x 6
in. (height)
1-8
10/9/91
1.2.2 Firmware Specifications
Control codes
ESC/PTM level ESC/P 2
(EPSON standard code for printers)
Printing direction
Bidirectional with logic seeking
Input data buffer
8KB, 32KB, 84KB; to change RAM (4A 5A)
Character code
8 bits
Character tables
Italic character table, PC 437, PC 850, PC 880, PC 883, PC 865
(PC indicates character tables for personal computers.)
Fonts and pitches
Bit map fonts
Scalable fonts
Printing modes
EPSON Roman
EPSON Sans Serii
EPSON Courier
EPSON Prestige
EPSON Script
EPSON Script C
OCR-B
EPSON Orator
EPSON Orator-S
EPSON Draft
EPSON Roman
EPSON Sans Serif
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)
. Character pitch (10, 12, 15, or proportional)
. Condensed
+ Double-width
+ Double-height
. Emphasized
- Double-strike
- Italic
- Underlined
- Double-underlined
- Overscore
m Strike-through
* Outline
. Shadow
1-9
1o/9/9 1
NOTES: High-speed draft is valid when the printer’s status is as follows:
- High-speed draft mode is selected by DIP switch.
- Emphasized mode is not selected.
. Condensed mode is not selected.
- Draft mode is selected.
. No D/L (download) characters are sent to the printer.
- The horizontal dot space of characters is not set.
. No bit image is sent to the printer.
* Super/subscript is not selected.
(The printer switches back to normal mode to print emphasized, condensed, or download
characters and bit images.)
Printing speed
See Tables l-8 and l-9.
Printing columns
See Table 1-8.
Character matrix
See Table l-10.
Character size
See Table l-10.
Table 1-8. Printing (Text Mode) 80/13&Column
cpi:
cps:
LQ:
HSD:
characters per inch
characters per second
letter quality
high-speed draft
1-10
REV.-A
Table 1-9. Printing (Bit Image Mode) 80/136-Column
dpi:
ips:
dots per inch
inches per second
1-11
REV.-A
Table 1-10. Character Matrix and Character Size
LQ, 12 pitch, condensed
-
360
-
180
Max. 37 X 22
Min. 18 X 22
360
360
2.6 X 3.1
1.0 x 3.1
180
-
360
360
-
180
LQ, proportional, super/subscript
Max. 28 X 16
Min. 12 X 16
360
360
1.8 X 2.3
0.7 X 2.3
180
LO, proportional, super/subscript,
condensed
-
360
360
-
180
LQ, proportional
LO, proportional, condensed
NOTES: l
l
HDD is the horizontal dot density in dots per inch.
Face matrix and character size indicate the size of the maximum character. This value
depends on the paper, the ribbon, and other variables.
0 Unit ESC sp (which also can be sent as unit followed by the character string
CHRS(&h20)) indicates
the minimum length to be added to the right of the character specified with the ESC sp
control code.
l “----” indicates that printer firmware reshapes the character matrix. Character width
becomes half of the noncondensed character width.
1-12
REV.-A
(Typical LO character)
(Typical draft 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
1
Ascender area
5
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
R
I
G
l-l
T
S
P
A
C
E
I
Descender area
Ascender
area
R
I
G
Ii
T
S
P
A
C
E
Descender area
29 dots
(Typical LQ. excluding 15 pitch)
15 dots for
15 pitch and condensed LO
Character width (CW)
Character width (CW)
4
1 2 dots (10 CPI) 120 DPI
15 dots (12 CPI) 180 DPI
1 6 dots (15 CPI) 240 DPI
3 6 dots (10 CPI) 360 DPI
14 dots (condensed 10 CPI) 2 4 0 DPI
3 0 dots (12 CPI) 360 DPI
1 2 dots (condensed 12 CPI) 2 4 0 DPI
2 4 dots (15 CPI) 360 DPI
2 1 dots (condensed 10 CPI) 3 6 0 DPI
18 dots (condensed 12 CPI) 3 6 0 DPI
(Subscript
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
(Subscript
character)
-/
-
1
character)
+/
R
R
I
G
H
T
;
4
5
6
7
8
9
10
11
12
13
14
15
16
S
P
A
C
E
-
I
G
H
T
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 interface are as follows:
Data format
8-bit parallel
Synchronization
/STROBE signal
Handshaking
BUSY and / ACKNLG signal
Signal level
TTL-compatible
Adaptable connector
57-30360 (Amphenol) or equivalent
Data transmission timing
See Figure 1-6.
BUSY
ACKNLG
DATA
STROBE
pis+z+sj
b*j
Figure 1-6. Data Transmission Timing
Table l-l 1 provides the connector pin assignments and describes the signal functions of the 8-bit parallel interface.
Table l-l 1. Connector Pin Assignments and Signal Functions
Pin No.
Signal Name
Return
Pin No.
Dir.
Function
1
STROBE
19
IN
STROBE pulse to read the input data. Pulse width
must be more than 0.5 ps. Input data is latched at
the falling edge of this signal.
2
3
4
5
6
7
8
9
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
20
21
22
23
24
25
26
27
IN
IN
IN
IN
IN
IN
IN
IN
Parallel input data to the printer.
HIGH level means data 1.
LOW level means data 0.
IO
ACKNLG
28
OUT
This pulse indicates data has been received and
the printer is ready to accept more data. Pulse
width is approximately 11 ps.
11
BUSY
29
OUT
HIGH indicates the printer cannot accept more
data.
12
PE
30
OUT
HIGH indicates paper out. This signal is effective
only when the ERROR signal is LOW.
13
SLCT
-
OUT
Always HIGH output. (Pulled up to +5 V through a
3.3K-ohm resistor.)
1-14
1 o/9/91
Table 1-11. Connector Pin Assignments and Signal Functions (Cont.)
Pin
No.
14
Signal Name
/AUTOFEED-XT
Return
Pin No.
-_
Dir.
IN
15
If LOW when the printer is initialized, the printer automatically
performs a line feed upon input of the CR code (auto LF).
Not used.
16
GND
17
Chassis GND
--
-_
Ground for twisted pair grounding.
--
Chassis ground level of printer.
18
Not used.
19to
30
GND
31
/INIT
32
33
Ground for twisted pair grounding.
16
IN
Pulse input for printer initialization (width: 50 p.s, minimum,
active LOW).
/ERROR
OUT
LOW indicates an error has occurred in the printer.
GND
--
Ground for twisted pair grounding.
34
Not used.
35
36
Function
/SLCT-IN
OUT
Always HIGH. (Pulled up to +5 V through 3.3K-ohm resistor.)
IN
If LOW when the printer is initialized, DCl/DC3 control is
disabled.
NOTES: * “Dir.” indicates the direction of the signal flow as viewed from the printer.
- “Return Pin No.” denotes a twisted pair return line.
* The cable used must be shielded to prevent noise.
* All interface conditions are based on lTL levels. Both the rise and fall times of all signals must be less than
0.2 p.s.
- The /AUTOFEED-XT signal can be set to LOW using DIP switch 2-4.
* The /SELECT-IN signal can be set to LOW using jumper 3.
* 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.
1-15
1o/9/91
1.4 CONTROL PANEL
There are seven non-lock buttons and 19 indicators on the control panel.
0
DRAFT
0 Sans-Serll 0 Scr1pt.C
0 POWER 0 DATA
0
Courier
0 Presllge
c1 MULTI.PART
0
Roman
0 Script
0
to
CPI
0
1 7
CPI
0
12
CPI
0 2 0
CPI
0
(5
CPI
0 PROPORTIONAL
0 OCR-E
0 ORATOR 0 SLOT
0 Orator-S
OPAPER O U T
Figure 1-7. Control Panel
1.4.1 Buttons
(1) Operate switch
Use this switch to turn on the power 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.
(8) FONT (green) -Draft, Courier, Roman, Sans 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-870/1170.
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 ANIT signal.
Table 1-12. DIP Switch Set 1 (SW1)
I
Description
1
2
3
International and PC character set selection
4
Character table selection
5
6
Factory
Setting
OFF
ON
I1
ON
ON
ON
See Table l-l 4.
Graphic
Italic
OFF
Graphics direction
Unidir.
Bidir.
OFF
High-speed draft mode
Invalid
Valid
OFF
Invalid
Valid
I
OFF
OFF
I
OFF
7 1 Input buffer
8 -One-inch skip continuous paper
I
ON
I
Table 1-13. DIP Switch Set 2 (SW2)
Description
No.
ON
OFF
Factory
Setting
1
2
Page length of continuous paper
See Table 1-15.
3
Auto tear-off
ON
OFF
OFF
4
Auto line feed
ON
OFF
OFF
1-18
OFF
OFF
REV.-A
Table 1-14. International and PC Character Set Selection
l-l
1-2
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
Country
PC
ON
U.S.
OFF
ON
OFF
ON
OFF
ON
OFF
France
Germany
U.K.
Denmark 1
Sweden
Italy
Spain 1
437
850
860
863
865
l-3
(437)
(437)
(437)
When you turn on DIP switch l-4 and use ESC
+ 0 to select the italic character table, the
country setting becomes U.S.
When you turn off DIP switch l-4 and use ESC
t 1 to select the graphics character table, the
PC setting becomes 437.
Table l-l 5. Page Length
2-1
2-2
OFF
ON
OFF
ON
OFF
OFF
ON
ON
Page Length
11 inches
12 inches
8.5 inches
70/6 inches
1.52 Jumpers
If jumper 3 is connected to GND,.the /SLCT-IN signal is set to LOW and the printer ignores DCl/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.A.
France
Germany
U.h.
r)erlnls I k.
s (4 t cd 7 1 /
I 1. 3 i ,i
Sl’d 1 I(
-T 4 3 7
SWl-1 1-2 1-3 1-4
on
on
0n
i? I1
cjtf
(If i
oit
on
on
off
off
on
cn
oft
on
off
on
oft
on
ott
on
htt
0t
0i
on
on
r
.-,,/
i
i
off
off
off
off
off
oft
rit f
pfi
H i g h s p e e d d r a f t SWl-6
ot i
Valid’
Invalid
Receive buffer
Valid
Invr;ljd
1 inch skip
Invalid
’ i (1
h
0~
on
SWl-7
off
0 1.1
SWI-8
off
(\I1
swz-1 2 - 2
off off
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.
I6
2 0
4 0 16 5 2 0
2 0 54 6 8 6
bD
7 0 6 C 65 2
7 5 6D 7 0 20 7
69 7 3 2 0 6 6 6
OA 2 0 2 0 2 0 2
0 16 7
9 7 3 2
0 6F 6
0 72 6
5 61 7
0 2 0 6
4
0
6
9
4
9
0 1 LB
6 9 7 3
2 0 61
6E 74
7 5 7 2
7 4 20
3 6 12 1 8
2 0 6 1 6E
2 0 6 4 bl
6 F 7.5 7 4
6 5 2 0 6D
6 5 61 7 3
50 IB 7
2 0 6 5 7
74 61 2
2E 2 0 5
6 1 6 8 6
7 9 2 0 6
0
8
0
4
5
6
0 0
61
6 4
6 8
7 3
6F
Figure 1-9. Hexadecimal Dump
1-20
.@.R..t..6..P.p.
T h i s i s a n exa
m p l e o f a d a t a d
ump p r i n t o u t . T h
is feature makes
.
i t e a s y fo
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.
0
0
0
0
The home position is not detected at printer mechanism initialization.
The home position is detected during printing.
The PAUSE button is pressed and the printer enters the PAUSE condition.
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:
0 The BUSY signal becomes HIGH.
0 The /ERROR signal becomes LOW.
0 No / ACKNLG pulse is sent.
1.6.5 Buzzer Operation
The buzzer sounds under the following conditions:
0 A paper-out error is detected. (The buzzer beeps three times for 0.1 seconds, with 0.1 second
intervals.)
0 Abnormal carriage movement is detected. (The buzzer beeps five times for 0.5 seconds, with 0.5
second intervals.)
0 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 /INIT 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
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
The current paper position becomes the top-of-form position.
Left and right margins
Released
Line spacing
l/6 inch
Vertical tabs
Cleared
Horizontal tabs
Every eight characters (relative)
Family number of typestyle
Last font selected from the control panel
Download characters
Kept during software initialization Cleared during hardware
initialization
Character spacing
Printing effects
Condensed printing
Printer condition
Last setting selected from the control panel
Cleared except condensed printing
Last setting selected from the control panel
RUNNING (not PAUSE)
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
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
0.06 to 0.12 mm (.0024 to .0047 in.)
0.13 to 0.17 mm (.005 1 to .0067 in.)
0.18 to 0.25 mm (.007 1 to .O 10 in.)
0.26 to 0.32 mm (.OlO to .013 in.)
NOTE: If the printing density becomes lighter, move the adjust lever position one step higher.
1 position (2 s?p) ev-
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 from overheating and to stop printing
when the head driver voltage drops. If the temperature of the printhead exceeds the maximum allowed
value, printing stops automatically. When the printhead temperature drops to a certain value, printing
resumes. At first, printing resumes at a lower print speed. However, as the printhead temperature
decreases, print speed increases
to the normal speed. If the printhead temperature continues to increase at the lower speed, the printer
stops printing. The printer stops or resumes printing as the printhead temperature increases or
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.
1-25
6/4/93
1.7 MAIN COMPONENTS
The table below identifies and describes the main board and driier board modifications that have been made for the
LQ-870/1170 printer.
Table 1-17. Main Boards and Driver Board
Board Name
Description
CO60 MAIN
Main board in original LQ-870s and LQ-1170s. A different board CO60 board
was used for the LQ-870 and for the LQ-1170. Driver circuitry was on a
separate board.
Co60 DRV
Contained driver circuitry. Used only with the CO60 MAIN board.
CO61 MAIN
For the LQ-1170 only. Combined main board and driier board. (CO60 DRV
board is unnecessary.)
CO60 MAIN B
New boards for the LQ-870 and LQ-1170. There is a different CO60 MAIN B
board for the LQ-870 than is used for the LQ-1170. These boards combine main
board and driver board (CO60 DRV board is unnecessary), and can replace any
previous board for a printer of the same carriage width.
. CO60 MAIN board:
* CO61 MAIN board:
CO60 MAIN B board:
CO60 DRV board:
CO60 PNL board:
CO60 PSB board:
. M-5Dl015D60:
l
l
l
l
original main control board).
LQ-1170 main control and driver board).
new main control and driver boards for the LQ-870 and for LQ-1170).
the drive board (not needed when the Co61 or CO60 MAIN B board is used).
the control panel board.
the power suppty board.
the printer mechanism.
Figure 1-11. LQ-870/1170 Component Layout
1-26
1.7.1 C060 MAIN, C061 MAIN, and C060 MAIN B Boards (Main Control Circuit Board)
The CO60 MAIN board was the original board used in the LQ-870/1170 printer when it was released in 1991. (There
were separate CO60 MAIN boards for the LQ-870 and LQ-1170, and it required a driver board.) The CO61 board for the
LQ-1170, which became available in 1992, combined the main board with the driver circuitry. There are now two new
CO60 MAIN B boards, which also contain driver circuitry, and are defined at the factory for use with either the LQ-870
or the LQ-1170.
All these boards contain a TMP90CO4 8-bit CPU, an EO5A49BB gate array, a PROM (512K), a PSRAM (256K), a mask
ROM (1 M), and an EEPROM. In addition, the CO61 and CO60 MAIN B also include the components and circuits built
into the CO60 DRV board. The CO60 MAIN B board for the LQ-1170 contains an SRAM in location 5A, which is not
mounted in the CO60 MAIN B board for the LQ-870.
Gere Array E05A49B (48)
Driver Circuit (Same as CO60 DRV)
1 CPU TMP90C04 1 (2C)
CPU TMPSOC 04 1N (2C)
I
I
(14
EEP
PSRAM
(4A/SA)
(3A)
PdOM (3A)
EEPR6M [SC) 1
MASK ROM (2A)
MASK ROM
M65256 (4A)
(COSO)
(CO61)
Driver circuit
(Sameasthe~DRV)
CPU
TMFWCO41
PROM (3A)
MASK ROM (WA)
G/A
EO5A49BB
(48)
(CO60 MAIN-B)
Figure 1-12. C060 MAIN, C061 MAIN, and C060 MAIN B Boards
1-27
6/4/93
1.7.2 C060 PNL Board (Control Panel Circuit Board)
The CO60 PNL board is the LQ-870/1170 control panel, which includes the buttons, indicator LEDs, and DIP switches.
Figure 1-13. CO60 PNL Board
1.7.3 C060 PSB Board (Power Supply Circuit Board)
The power supply unit consists of a switching regulator circuit that converts the AC line voltage to the DC vottages (for
example, +35 V and +5 V) used by the printer. The CO60 PSB board uses a 120 V input type.
Figure l-14. CO60 PSB Board
1-28
6J4193
1.7.4 C060 DRV Board (Head Control Circuit Board)
The CO60 DRV board (consists of a SLA7024M hybrid IC, a PU1501, and a PU4135 transistor array. The circuitry for
this board has been incorporated into the CO61 MAIN board and the CO60 MAIN B boards.
Figure l-15. CO60 DRV Board
1.7.5 M-5D10/5D60 Printer Mechanism
The M-5D10/5D60 printer mechanism was developed specifically for use with LQ-870/1170. 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.
Figure 1-16. M-5D10/5D60 Printer Mechanism
1-29
WI93
1.7.5 Housing
The LQ-87011170 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.
%IY
(LQ-870)
Figure l-17. Housing
1-30
REV.-A
CHAPTER 2
OPERATION PRINCIPLES
2.1
PRINTER MECHANISM OPERATION ............................................ 2-1
Printhead Mechanism ........................................................... 2-1
2.1.1
2.1.2 Carriage Movement Mechanism ....................................... 2-2
Paper Advance Mechanism ................................................. 2-3
2.1.3
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.
How the Printhead Works .............................................. 2-1
Figure 2-2.
Carriage Movement ........................................................... 2-2
Figure 2-3.
Moving the Paper-Thickness Adjustment Lever ..... 2-2
Figure 2-4.
Friction Feeding Using the Top Entrance .................. 2-3
Figure 2-5.
Push Tractor Operation ................................................... 2-4
Figure 2-6.
Pull Tractor Operation ...................................................... 2-5
Figure 2-7.
Push-Pull Tractor Operation ........................................... 2-5
Figure 2-8.
Moving the Release Lever ............................................... 2-6
Figure 2-9.
Friction Feeding Using the Top Entrance .................. 2-6
Figure 2-10.
Push Tractor Feeding Using the Rear Entrance ...... 2-7
Figure 2-11.
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
2-i
REV.-A
Figure 2-13.
Friction Feeding Using the Front Entrance . . . . . . . . . . . . . . . 2-9
Figure 2-14.
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.
Ribbon Advance Mechanism .......................................... 2-11
Power Supply Circuit Block Diagram ......................... 2-13
Figure 2-17.
Control Circuit Block Diagram ...................................... 2-14
Figure 2-18.
Data Flow .............................................................................. 2-15
Figure 2-19.
Reset Circuit Block Diagram .......................................... 2-17
Figure 2-20.
/RESET Signal Timing ...................................................... 2-18
Figure 2-21.
Sensor Circuit Block Diagram ....................................... 2-18
Figure 2-22.
Carriage Motor Drive Circuit ......................................... 2-19
Figure 2-23.
Paper Advance Motor Drive Circuit ............................ 2-20
Figure 2-24.
Figure 2-25.
Printhead Drive Circuit .................................................... 2-20
Head Drive Signal Output Timing ................................ 2-21
Figure 2-26.
Parallel Interface Circuit ................................................. 2-22
Figure 2-27.
EEPROM Control Circuit ................................................. 2-22
LIST OF TABLES
Table 2-1.
Paper Advance Methods and Paper Entrances ......... 2-3
Table 2-2.
Ribbon Advance Gear Linkage ........................................ 2-11
Table 2-3.
Power Supply Boards ......................................................... 2-12
Table 2-4.
Power Supply Output Voltages and Applications .... 2-12
Table 2-5.
Functions of the Main IC and Circuits ......................... 2-16
Table 2-6.
Carriage Motor Drive Modes ........................................... 2-19
2-ii
REV.-A
2.1 PRINTER MECHANISM OPERATION
This section describes the Model 5D lo/5060 printer mechanism and explains how it works. The Model
5D 1 O/5060 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
Ribbon Mask
Dot Wire
Wire Resetting Spring
Actdting Plate Spring
Figure 2-l. How the Printhead Works
Figure 2-l 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.
Carriage Guide Sha
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
or away from the platen. Moving the paper-thickness adjustment lever to the fourth position or higher
slows the printing speed to protect the printhead. The PG sensor reads the current position of the
paper-thickness adjustment lever.
flyAdjustment
Shaft
PG !&or
Figure 2-3. Moving the Paper-Thickness Adjustment Lever
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 push-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-l 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
Rear
Front
Bottom
TOP
Friction
No
OK
No
OK
Push Tractor
OK
OK
No
No
Pull Tractor
OK
OK
OK
No
Push-pull Tractor
OK
OK
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)
Paper Tension Roller
&>/aper Tension Roller
Gear
L
Tracter
Reduction Gear
Paper Feed R
Paper Feed
Motor
Platen Gea;
Paper Feed Reduction Gear
//U’
Paper Feed Motor
Pinion Gear
Figure 2-4. Friction Feeding Using the Top Entrance
2-3
REV.-A
Push Tractor Method
When the push tractor is selected, the tractor reduction gear engages the tractor gear on the tractor
assembly. The tractor reduction gear is driven by the paper-feed gear, which in turn is driven by the
paper-feed motor pinion gear. The paper-feed pinion gear, when turning in the direction of the black
arrow, results in pushing the paper through the mechanism.
During tractor feeding, the release lever is set to the tractor position to disengage the friction drive.
This releases the pressure between the paper advance roller and the platen. Figure 2-5 illustrates push
tractor operation.
Paper (Continuous)w _, _
Paper Tension Roller
I ransmlsslon tiear-,
\
ractor Reduction Gear
, Paper Feed Motor
1 Wnbon bear
Paper Feed Reduction Gear
Platen Gear
Figure 2-5. Push Tractor Operation
2-4
REV.-A
Pull Tractor Method
Pull tractor feeding is basically the same as push tractor feeding. In push tractor feeding, the tractor
(the paper advance inechanism) is before the paper entrance. It pushes the paper through the printer
mechanism. In pull tractor feeding, however, the tractor is after the paper entrance. Because it pulls
the paper through the printer mechanism, it requires no paper tension unit. Figure 2-6 illustrates pull
tractor operation when you insert paper into the bottom paper entrance.
Paper (Continuous)
Platen v,[
Tractor Gear
Paper Tension Roller
ransmission Gear
Paper Feed Reduction
Gear
Figure 2-6. Pull Tractor Operation
Push-Pull Tractor Method
The push-pull tractor method is a combination of the push tractor and pull tractor methods. In push-pull
tractor feeding, the printer uses two tractors, one in front of and one behind the paper entrance, to
advance the paper. They simultaneously push and pull the paper through the printer mechanism. Figure
2-7 illustrates push-pull tractor operation.
Paper
(Continuous)
Tractor Gear
Platen
Paper Tension Roller
Transmission Gear
ctor Reduction Gear
Pinion Gear
Figure 2-7. Push-Pull Tractor Operation
2-5
REV.-A
You use the release lever to switch between friction and tractor feeding. Setting the release lever to
the friction feed position presses the paper advance roller against the platen. Setting the release lever
to the tractor feed position separates the paper advance roller from the platen and releases this pressure.
The release detector senses the current position of the release lever.
Release Lever
Release Sensor
Paper’Feed Roller
Figure 2-8. Moving the Release Lever
2.1.3.2 Paper Insertion Entrances
This section describes how the printer feeds paper when you use each of the paper insertion entrances.
Top paper insertion entrance
When you insert paper into the top entrance, the printer uses friction feeding to advance the paper.
The printer has two paper-out detectors: the front paper-out detector, which is in front of the printer
mechanism, and the rear paper-out detector, which is behind the printer mechanism. When you insert
paper into the top entrance, the rear detector senses when the paper runs out.
Paper (Cut Sheet)
Paper Tension Roller
Pyinthead
Pj/aten
Sheet Guide
r-End Sensor (Rear)
Paper Feed Roller
Figure 2-9. Friction Feeding Using the Top Entrance
2-6
REV.-A
Rear paper insertion entrance
When you insert paper into the rear entrance, the printer can use the push tractor, the pull tractor, or
the push-pull tractor method to advance the paper. The rear paper-out detector senses when the paper
runs out.
Paper (Continuous)
\
Paper Tension Roller
Push Tractor
aper-End Sensor (Rear)
Paper Feed Roller
Figure 2-10. Push Tractor Feeding Using the Rear Entrance
Pull Tractor
-
Paper‘Feed Roller
Figure 2-11. Pull Tractor Feeding Using the Rear Entrance
2-7
1 o/9/9 1
Paper (Continuous)
Pull Tractor
Printhead \
Paper-tno 38
.r)
Paper Fekd Roller
Figure 2-1 l-l. Push-Pull Tractor Feeding Using the Rear Entrance
Bottom paper insertion entrance
When you insert paper into the bottom entrance, the pull tractor advances the paper. The front paper-out
detector senses when the paper runs out.
Pa per (Continuous)
Paper Feed Roller
/
1
Paper-End Sensor (Front)
From Bottom Insertion
Figure 2-12. Pull Tractor Feeding Using the Bottom Entrance
2-8
REV.-A
Front paper insertion entrance
When you insert paper into the front entrance, the printer can use friction feeding, the push tractor,
the pull tractor, or the push and pull tractors to advance the paper. The front paper-out detector senses
when the paper runs out.
Paper Tension Roller
PF
Paper-End Sensor
From Front Insertion
Figure 2-13. Friction Feeding Using the Front Entrance
Paper (Continuous)
Printhead \
Paper-End Sensor (Front)
From Front Insertion
Figure 2-14. Pull Tractor Feeding Using the Front Entrance
2-9
REV.-A
Paper (Cut sheet)
\
/
r
From Front Insertion
Paper-End Sensor
I
Push Tractor
\ape(r$i Roller
PF Drive Roller
Figure 2-14-l .Push Tractor Feeding Using the Front Entrance
Paper (Continuous)
From Front lnserti
Paper-End Sensor
Figure 2-14-2. Push Pull Tractor Feeding Using the Front Entrance
2-10
REV.-A
2.1.4 Ribbon Advance Mechanism
The ribbon drive gear advances the ribbon through a gear linkage. This arrangement of gears always
turns the ribbon drive gear counterclockwise, regardless of the direction in which the carriage is moving.
Table 2-2. Ribbon Advance Gear Linkage
I
Direction of Carriage
Movement
Left to right (arrow I) )
Right to left (arrow 0 )
Gear Linkage
Belt-driven pulley l Ribbon transmission gear w
Planet gear (1) l Planet gear (3) l Planet gear (4)
Ribbon-driving gear
l
Belt-driven pulley 0 Ribbon transmission gear t$
Planet gear (1) 4 Planet gear (2) 0 Ribbon-driving gear
The ink ribbon within the cartridge case is an endless ribbon. The pressure of the ribbon grip roller
holds the ribbon against the ribbon advance roller. The ribbon advance roller is linked to the ribbon
drive gear and winds the ink ribbon. The ribbon brake spring is attached to the exit slot of the cartridge
case. It prevents slack in the ribbon and maintains the correct ribbon tension. The ribbon mask keeps
the paper clean by preventing the ribbon from brushing against the paper.
Ribbon Feed Roller
h
Ribbon Mask
Ribbon Pressure
Roller
Planet Gear ,fl-
Ribbon Driving
\
Gear
Ribbon Transmission
\
Gear
Planet
Gear
e
Figure 2-15. Ribbon Advance Mechanism
2-11
REV.-A
2.2 POWER SUPPLY OPERATION
The printer can be powered by either of two power supply boards: the 120 V CO60 PSB board or the
220/240 V CO60 PSE board. The only difference between these boards is in the primary circuitry. The
ways in which they supply power to the printer are identical. These power supply boards output the
DC current necessary to drive the printer control circuits and the printer drive mechanism. Table 2-3
shows the input voltages and fuse ratings for these boards.
Table 2-3. Power Supply Boards
Board
CO60
PSB
CO60
PSE
Fuse Fl Rating
Input Voltage WAC)
103.5
2.5A/ 125 V
to 132
1.25A / 250 V
198 to 264
2.2.1 Power Supply Overview
The power supply board has two power output lines that supply power to the various control circuits
and drive mechanisms. Table 2-4 lists the parts of the printer that run off these two DC output supply
voltages.
Table 2-4. Power Supply Output Voltages and Applications
Applications
Output Supply Voltage (DC)
+35 v
+5 v
Carriage motor drive
Paper advance motor drive
Printhead drive
CO60 MAIN board logic circuitry
Various sensors
Control panel LEDs
Paper advance motor hold
2.2.2 Supply Circuit Operation
Figure 2-l 6 shows the power supply circuitry in block diagram form. AC power feeds into the printer
from the external power source. A filter circuit removes the noise. The AC voltage then undergoes full
wave rectification and is smoothed to produce the direct current supply voltage. This voltage is fed
through a switching circuit and secondary smoothing circuit to produce the stepped down +35 VDC
supply. A +35 V line voltage detector circuit is connected to the switching circuit. This feedback control
arrangement ensures that the +35 VDC supply remains stable.
The +5 VDC supply is achieved by feeding the +35 VDC line through the +5 VDC power supply circuit.
This circuit further steps down the +35 VDC voltage and outputs a stabilized +5 VDC supply.
There are four circuits to protect the supply circuitry and avoid danger. The +5 VDC line contains a
current overload protection circuit and a voltage overload protection circuit. The current overload
protection circuit is part of the + 5 VDC supply circuit. It cuts the + 5 VDC line if the current is too great.
The + 5 V voltage overload protection circuit cuts the supply if the voltage reaches or exceeds + 7 VDC.
It stops switching circuit operation, which stops the output of the +35 VDC line.
2-12
REV.-A
The +35 VDC line has a voltage overload protection circuit and a voltage drop protection circuit. The
+35 V voltage overload protection circuit cuts the supply if the voltage reaches or exceeds -t 36 VDC.
It stops switching circuit operation, which stops the output of the +35 VDC line. The voltage drop
protection circuit protects the printer from damage that might occur if the secondary circuitry of the
+35 VDC line short circuits. If a voltage drop is detected, it stops switching circuit operation, which
stops the output of the +35 VDC line.
Power Supply Board
r------------------------------------------------------------------------,
Primary
i Secondary p-F-p + t5VDC
I
qt
Full wave
Rectificatio
Circuit
--)
L -D $35
I
II
I1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
- - - - - - -.-.- - - - - - - - - - - - - - - -
-_ .---_
I
+5 line
Voltage
Overload
Protection
Circuit
+35 hne
Voltage
Overload
Protection
Circuit
I
I
I
I
-------r--------------~~~~~~~~~---------J
t
AC Input
Figure 2-16. Power Supply Circuit Block Diagram
2-13
V D C
Power
Switch
2.3 CONTROL CIRCUIT OPERATION
The control circuit consists of three boards: the main board (CO60 MAIN, CO61 MAIN, or CO69 MAIN B), which is the
main control board, the CO60 DRV board, the driver board (used only with the CO60 MAIN board), and the CO60 PNL
board, the control panel board. The CO61 and CO60 MAIN B boards combine main control circuitry and driver circuitry
on one board. This section describes how these boards work.
2.3.1 Control Circuit Operation Overview
The printer’s CPU is an 6-bii CPU TMP9OCO41 that runs at 10 MHz. It controls all the components of the printer. The
EO5A49BB gate array contains various memory management functions that assign memory and I/O areas. The PU4135
rationalizes and simplifies the circuitry and contains all the driver circuits for driving the printer mechanism on five chips.
Figure 2-17 shows the control circuits in block diagram form.
CO60 PNL
Control
Panel
CO60 MAIN CO61 MAIN CO60 MAIN B
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...-.-..-~...-..--.........~~-.?..........~~~.-.-...~....~...~--.............
.
Parallel
I/F
Optional
EEPROM
(SC)
_
G/A
EOSWBB (48)
MASK
ROM
8M
(1/2A)
PROM
FP-Bl
512K
. . . . . .._...__.. I
(34
-
TMP9OC041
(Xl
i SLA7024M
i (1~7)
i
r
WA
Gate array
GAP
Platen-gap adjust lever position sensor
HP
Home-position sensor
RELEASE Release sensor
PEl
Front paper-out detector (positioned in front of the printer mechanism)
PE2
Rear paper-out detector (positioned behind the printer mechanism)
Figure 2-17. Control Circuit Block Diagram
2-14
PSRAM
258K
(4A)
PSRAM
REV.-A
Table 2-5 lists the functions of the printer’s main components and circuits. The CPU converts the print
data sent from the host computer to image data (the print image). Then the printer loads the image data
to RAM. The printer processes each line of data sequentially. The CPU transfers the print data to the
printhead drive circuit and sends the printhead drive pulse to the printhead drive circuit. The length
of the pulse corresponds to the printhead drive voltage. Then the printhead drive circuit outputs the
printhead drive signal.
7
Host
Computer
Print
Data
RAM
G/A
I
---------
+35V Line
t
CPU
t-v
II--
STK-6022B
(i
Data line
Data Latch
and
Data Output
Figure 2-18. Data Flow
2-15
--) Printhead
REV.-A
Table 2-5. Functions of the Main IC and Circuits
IC or Circuit
TMP90C04 1
E05A49
Functions
Location
2 C
4B
Receives data from the host computer and loads the data to the input buffer in
RAM (under interrupt processing control). Expands the input data held in the
buffer to create image data. Loads this image data to the image buffer in RAM.
Transfers the image data to the printhead drive circuit. Also controls various parts
of the printer mechanism, such as the motors.
This gate array consists of seventeen components configured on a single chip:
Memory Management Unit
Wait Control Unit
Refresh Control Unit
Program ROM Select Unit
Centronics I/F Control Unit
Option Control Unit
Panel Control Unit
EEPROM Control Unit
General Output Unit
HPW Differential Unit
HPW Pulse Limit Unit
Bit manipulation unit
Head Control Unit
Internal Clock Generate Unit
Internal I/O and MMIO Decode Unit
Output Data Multiplex and input Data Latch Unit
PU4135
IC8-IC13
This is a drive circuit for the printhead. It consists of six chips.
PROM
3A
The PROM contains the program that runs the CPU.
RAM
4A
5A
The RAM contains the CPU working area and the various buffers. (5A is not used
and not installed in the 80-column printer.)
MROM
1A
(Mask ROM) 2A
The mask ROM contains the character design (also called the character
generator).
EEPROM
The EEPROM is an electronically writable and erasable ROM that contains information such as the top-of-form position.
5c
V r e f C i r c u i t 1C
TL43 1
This circuit generates the reference voltage used irrthe A/D converter in the CPU.
2-16
1 O/9/9 1
2.3.2 Reset Circuit
Figure 2-19 shows the reset circuit in block diagram form. The reset circuit issues the /RESET signal. The control
circuits are initialized when they receive the /RESET signal. The conditions under which the /RESET signal is output
are described below.
When you turn on the power
Immediately after you turn on the power, PST-520 (6C) outputs the NCCON pulse. E05A49 (48) receives this pulse
and outputs the /DISC pulse. Then the electrical charge through the resistor (R49) in the condenser (C28C29) is
discharged. After this, E05A49 receives the THLD signal and outputs the /RESET signal. After a certain time has
elapsed, the charge in the condenser builds up again. The THLD signal is canceled and then the /RESET signal is
canceled.
When the CPU performs a reset (CPU self-reset)
The CPU outputs the /RESET signal if there is a /RESET request for E05A49 and if E05A49 has output the /DISC pulse.
t5v
Line
PST520
(‘34
E05A49
(4B)
A
_-----------
CPU RSET 22PIN
L------_----
1
3
OUT
9
---FaTPOUT
--) RESET
10
----) T H L D
R69 2K
4
11
DISC
OPTION RST 1lPlN
Figure 2-19. Reset Circuit Block Diagram
2-17
REV.-A
Power On
CPU Self Reset
4
4
+5 V Line
VCCON
----I
DISC
u
THLD
RESET
Figure 2-20. /RESET Signal Timing
2.3.3 Sensor Circuits
Figure 2-21 shows the sensor circuits in block diagram form. When the printhead temperature exceeds
the maximum allowed value, the TEMP2 signal and other signals, such as the CRHOME signal, are sent
directly to the CPU. The +35 V line signal passes through the reset circuit before it reaches the CPU.
Terminals P50 to P55 in the CPU are used for the A/D converter. The Vref circuit generates the A/D
converter reference voltage Vref.
C P U (1C)
LEVER 31
P31
RESET
NMI
P S T 5 2 9 C (36)
P50
Vref -
+35V Line 17
T28
4.741 v
Vref Circuit
Figure 2-21. Sensor Circuit Block Diagram
2-18
REV.-A
2.3.4 Carriage Motor Drive Circuit
Figure 2-22 shows the carriage motor drive circuit. An open-loop, constant-current drive arrangement
runs the carriage motor. 2-2 and l-2 phase excitation drive the motor. 2-2 phase excitation corresponds
to two l-2 phase excitation steps. For each single-step phase change of a 2-2 phase excitation motor,
the carriage moves l/120 inch. For each single-step phase change of a 1-2 phase excitation motor,
the carriage moves l/240 inch.
The carriage motor drive circuit of the SLA7024M detects and regulates the amount of current flowing
in the carriage motor coil. The current flowing through the coil varies depending on the speed of the
carriage motor. The CPU sets the amount of current via the E05A49 I/O port. Signals are sent to HOLD
to-M on the SLA7024M. The SLA7024M sets the coil current to correspond to the carriage motor speed.
The printer uses ports P60 to P63 in the CPU exclusively as control ports for the stepping motor.
SLA7024M (IC15)
CPU (2C)
GRAIN
CRBIN
CR-A
CR-B
P60
P 6 1
P 6 2
P63
-HOLD
- L
-M
PO
Pl
P2
Data
Bus
CRA
CRB
CR-A
CR-B
f Coil Current
CR Motor
Coil Current
GP
GND
E05A49 (48)
Figure 2-22. Carriage Motor Drive Circuit
Table 2-6. Carriage Motor Drive Modes
Drive Mode
Excitation
Drive Frequency
Standard Characters Printed
10/3 X s p e e d
2-2 phase
3593 pps
High S p e e d D r a f t
3 X speed
2-2 p h a s e
Draft
8/3 X s p e e d
2-2 p h a s e
3 3 0 0 pps
2 9 3 2 pps
2 X speed
2-2 p h a s e
2 2 0 2 pps
High S p e e d J a p a n e s e Kanji
1.5 X speed
l - 2 phase
1651 pps
4/3 X s p e e d
1 X speed
l - 2 phase
l-2 phase
1 4 6 3 pps
3/4 X s p e e d
l - 2 phase
1101 pps
8 2 5 pps
2/3 X s p e e d
l - 2 phase
733
0.5 X speed
l - 2 phase
550
pps
pps
2-19
Draft
LQ, Japanese Kanji
1 o/9/9 1
2.3.5 Paper Advance Motor Drive Circuit
The printer uses a stepping motor to advance the paper. The minimum amount the printer can advance
paper is l/360 inch. The motor is a 2-2 or 1-2 phase, constant-voltage drive motor. P70 to P73 in the
CPU are the control ports for the stepping motor. Paper advance motor phase data is output through
these ports. PFB to PFD are turned on and off in the PU 150 1 according to the phase data the CPU sends.
When the paper advance motor is running, the voltage supplying the coil of the paper advance motor
is i-35 V. When the paper advance motor is not running and is in hold status, the supply voltage to
the coil is +5 V. Switching between these two supply voltages occurs at the PFCOM terminal of the
PU 150 1 when /PFENB is turned on or off.
STK-6022B (2A)
CPU (1C)
PFAIN Bl
PF-AIN
82
PFBIN 83
PF-BIN
84
P70
P72
P71
P73
Cl
C2
c3
C4
CP
PFA
PF-A
PFB
PF-B
PFCOM
PF MOTOR
f5V
1 De”:,” Fki
B
P
(PFCOM) Epk t35v
E05A49 ( 4 B )
Figure 2-23. Paper Advance Motor Drive Circuit
2-20
REV.-A
2.3.6 Printhead Drive Circuit
Figure 2-24 shows the printhead drive circuit in block diagram form. The print data already has been
expanded to create the image data. The CPU splits up this data three times and transfers this information
to the latch circuit in the E05A49. The CPU samples the voltage of the +35 V line via the A/D converter.
(See section 2.3.3.) The CPU outputs a pulse via the CPU time output port PPO. The length of this pulse
corresponds to the +35 V line voltage. This pulse becomes the head drive signal. In this way, PU4 135
(8A-13A) outputs head drive signals (signals HDl to HD24) that relate to voltage levels through the
length of the pulses. These signals are output to the head for each of the sections of print data that
were created by dividing the data three times before sending it.
By sampling the +35 V line voltage and determining the length of the head drive signal, it is possible
to keep the energy supplied to the head constant. If the voltage of the +35 V line is HIGH, the CPU
shortens the output pulse. If the voltage of the f35 V line is LOW, the CPU lengthens the output pulse.
Figure 2-25 shows the timing of the head drive signal output.
Ei05A49 (48)
PU4135 (8 -13A)
31-4 X6
HEAD 1-24
l:I- 6 HDl-24 = P r i n t h e a d
CPU
-
u
n
P50
I
DATA LINE
: R74
1 3.3K 1 %
Figure 2-24. Printhead Drive Circuit
I
E05A49
1
I
1
1
output
I
PU4135
Cl -C6
I
HDl-24
-
-
-
-
-
----------1
I
L-----------J
- - - - - I
I
L----------J
Figure 2-25. Head Drive Signal Output Timing
2-21
REV.-A
2.3.7 Parallel Interface Circuit
Figure 2-26 shows the parallel interface circuit in block diagram form. The /STROBE signal latches the
data sent from the host computer in E05A49. E05A49 automatically outputs the BUSY signal to stop
the host computer from sending more data. Then it outputs the/lBF signal for the CPU. The CPU receives
the /IBF signal via the interrupt signal input port P82, recognizes that the printer has received the data
from the host computer, and reads the data latched in the E05A49. Then the CPU resets the BUSY signal
so that the printer is ready to receive more data from the host computer.
P a r a l l e l I/F
DO-7
D O - 7
DINO-7 DATAO-7
ii%
STB
STROBE - + _---r _ _ _ _ _ _ _ _ _ _ _
I
I
I
I
B U S Y
P82
e ----:
BUSY
C P U (2C)
E05A49 (48)
Figure 2-26. Parallel Interface Circuit
2.3.8 EEPROM Control Circuit
Figure 2-27 shows the EEPROM control circuit in block diagram form. The EEPROM contains information
such as the top-of-form position. EEPROM is non-volatile memory so information it contains is not lost
when you turn off the printer. Because the EEPROM is a serial I/O device, E05A49 converts the 8-bit
parallel data that the printer receives from the CPU to serial data.
DATA BUS
SCL
SCK
SDA
SDA
C P U (2C)
EEPROM (5C)
E05A49 (48)
Figure 2-27. EEPROM Control Circuit
2-22
1o/w93
C APTER 3
DISASSEME LY AND ASSEMBLY
3.1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Disassembly Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.2 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.3 Service Checks After Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.4 Screw Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 Removing the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2 Removing the Printer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2.1 Removing the Front Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.22 Removing the Upper Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3 Removing the Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3.1 Removing the Driver Board (C060 DRV Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3.2 Removing the Main Board (C060 MAIN Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3.3 Removing the Main Board (C061 MAIN or C066 MAIN B Board) . . . . . . . . . . . . . . . .
3.2.3.4 Removing the Power Supply Board (C060 PSB Board) . . . . . . . . . . . . . . . . . . . . . .
3.2.3.5 Removing the Control Panel Board (C060 PNL Board) . . . . . . . . . . . . . . . . . . . . . . .
3.2.4 Removing the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5 Disassembling the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.1 Removing the Carnage Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.2 Removing the Paper Advance Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.3 Removing the Flexible Flat Cable (FFC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.4 Removing the Carnage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.5 Removing the Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.6 Removing and Disassembling the Right Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.7 Removing and Disassembling the Left Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.8 Removing and Disassembling the Paper Guide Support Assembly . . . . . . . . . . . . . .
3.2.5.9 Removing and Disassembling the Carnage Guide Assembly . . . . . . . . . . . . . . . . . .
3.2.5.10 Removing the Home-Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.11 Removing the Rear Paper-Out Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.12 Removing the Front Paper-Out Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.13 Removing the Platen-Gap Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.14 Removing the Release Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.15 Disassembling the Tractor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.5.16 Arranging the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3-1
3-1
3-2
3-3
3-4
3-5
3-6
3-6
3-6
3-7
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-13
3-14
3-14
3-15
3-16
3-17
3-17
3-18
3-18
3-20
3-20
3-21
3-21
3-22
3-23
3-23
LIST OF FIGURES
Figure
Figure
Figure
Figure
Figure
Figure
Figure
3-1. Flowchart for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-2. Removing the Printer and Paper Eject Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3-3. Removing the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3-4. Removing the Front Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3-5. Removing the Optional Interface Card Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3-6. Removing the Driver Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3-7. Removing the C060 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Figure 3-8. Removing the C061 MAIN or C060 MAIN B Board . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Figure 3-9. Special Extractor Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-10
3-i
10/18/93
Figure 3-10. Removing the Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-11. Removing the Control Panel Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-12. Removing the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-13. Removing the Carriage Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-14. Removing the Paper Advance Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-15. Removing the FFC . . . . . . . . . . . . 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-16. Removing the Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-17. Removing the Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-18. Positioning the Platen Gear and Combination Gear . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-19. Disassembling the Right Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-20. Disassembing the Left Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-21. Removing the Paper Guide Support Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-22. Disassembling the Carriage Guide Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-23. Insertion Direction for Plain Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-24. Inserting the Release Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-25. Removing the Home-Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-26. Removing the Rear Paper-Out Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-27. Removing the Front Paper-Out Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-28. Removing the Platen-Gap Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-29. Removing the Release Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-30. Disassembling the Tractor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3-31. Arranging the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-10
3-11
3-12
3-13
3-14
3-14
3-15
3-16
3-16
3-17
3-17
3-18
3-18
3-19
3-19
3-20
3-20
3-21
3-21
3-22
3-23
3-23
LIST OF TABLES
Table
Table
Table
Table
3-1. Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2. Equipment Required for Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3. Inspection Checklist for Repaired Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4. Abbreviations Used for Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-ii
3-1
3-1
3-2
3-3
REV.-A
3.1 OVERVIEW
This section describes disassembly precautions, tools, service checks after repair, and screw
specifications.
3.1.1 Disassembly Precautions
Follow the precautions below when disassembling the printer.
Before disassembling, assembling, or adjusting the printer, disconnect the power cord from the
external AC power socket. Failure to do so risks personal injury. The printer’s power switch is wired
into the primary circuitry. As a result, the printer still remains live with current flowing even when
For efficient printer operation, use only the recommended tools for maintenance work.
Adjust the printer only as described in this manual.
3.1.2 Tools
Tables 3-l and 3-2 list the tools you need when disassembling, assembling, or adjusting the printer.
Use only tools that meet these specifications.
Table 3-1. Recommended Tools
Part No.
Tool
Round-nose pliers
Nippers
Tweezers
Soldering iron
E-ring holder # 2.5 (Note 2)
E-ring holder # 5
E-ring holder # 6
Phillips screwdriver No. 2
Normal screwdriver
Box driver (7 mm across)
Thickness gauge (0.36 mm)
Thickness gauge (0.40 mm)
B740400100
B740500100
B741000100
B740200100
B740800400
B740800700
B740800800
B743800200
B743000100
B741700200
-
NOTE
All tools are commercially available.
Table 3-2. Equipment Required for Maintenance
3-1
REV.-A
3.1.3 Service Checks After Repair
When repaired printer is to be sent back to the customer, use the checklist shown in Table 3-3 to note
the current state of the components. This checklist provides a record to make servicing and shipping
more efficient.
Table 3-3. Inspection Checklist for Repaired Printer
Category
Printer
features
Component
Printhead
Are any wires broken?
0 Checked, 0 Not necessary
Are any wires worn out?
0 Checked, 0 Not necessary
Does the carriage move smoothly?
0 Movement noisy, 0 Mechanism dirty,
0 Mechanism oily
0 Checked, 0 Not necessary
Is the carriage motor running at the correct
temperature and not overheating?
0 Checked, 0 Not necessary
Is the paper advancing smoothly?
0 Movement noisy, 0 Mechanism dirty,
0 Mechanism oily
q
Is the paper advance motor running at the
correct temperature and not overheating?
0 Checked, 0 Not necessary
Is the paper in the printer feeding
smoothly?
0 Checked, 0 Not necessary
Is the tractor feeding the paper correctly?
0 Checked, 0 Not necessary
Is the paper path clear of all obstructions?
0 Checked, 0 Not necessary
Is the platen free of damage?
0 Checked, 0 Not necessary
Ribbon
mask
Is the ribbon mask free of distortion?
0 Checked, 0 Not necessary
Self-test
Was the self test successful?
0 Checked, 0 Not necessary
On-line test
Was the on-line test successful?
q
Checked, 0 Not necessary
Printhead
Is the platen gap adjusted correctly?
q
Checked, 0 Not necessary
Printing
Is the bidirectional print position adjusted
correctly?
0 Checked, 0 Not necessary
DIP switch
settings
Are DIP switches the reset to their factory
shipment settings?
0 Checked, 0 Not necessary
ROM
version
The ROM version is ~.
0 Checked, 0 Not necessary
Is the ribbon removed?
0 Checked, 0 Not necessary
Are all necessary parts been included in the
shipment?
•i Checked, 0 Not necessary
Carriage
mechanism
Paper
advance
mechanism
Paper path
Adjustment
System
Jpgrade
Shipment
Is Check Required?
Item(s) to Check
3-2
Checked, 0 Not necessary
1 o/9/9 1
3.1.4 Screw Specifications
In the following sections, abbreviations are used for small parts, such as screws and washers. Tables. 3-4
and 3-5 list these abbreviations.
Table 3-4. Abbreviations Used for Screws
I
Abbreviation
Part Name
I
S(C)
Cross-recessed
Cross-recessed
Cross-recessed
Cross-recessed
CBB(C)
CB
CBS(O)
Bind
Bind
Bind
Bind
head Cone point S tight screw
head Cone point B tight screw
head screw
head S tight screw with Outside toothed lock washer
Table 3-5. Types of Screws and Abbreviations
Head
Side
TOP
.Cross-recessed head 1 .fjind
0
+
!.Slotted head
Washer
(assembled)
Body
1 ._Plain washer
1 .tjormal
II=
!I
c=
(with Notch)
OENl=
2. S-tight
cl
2._Pan
2 ._Outside toothed
lock washer
3. B-tight
8
\
/
aQ
m
3.Cup
4. lapping
I’
c=
4.Iruss
3-3
O(Q@
3.Spring washer
1019/91
3.2 DISASSEMBLY AND ASSEMBLY
This section describes how to disassemble and assemble the main components of the printer. When the
procedure for installing a component in the printer is simply the reverse of the procedure for removing the
component from the printer, no description of how to install the component is given.
Assembly and adjustment notes follow the disassembly procedure description, when necessary. Please
follow the instructions in these notes when you assemble or adjust printer components.
CAUTION
Before disassembling any part of the printer, read the warnings in Section 3.1.
Before disassembling any part of the printer, remove the paper and the ribbon cartridge.
Disassembly consists of the following procedures:
+
*
Removing the printhead
Removing the case
Removing the electrical circuits
Removing the printer mechanism
Disassembling the printer mechanism
Diagrams in the appendix show how the components fit together. Refer to them as necessary.
Remove ribbon cartridge.
-1 [“““i p===
-1 p-y
E
Disassembling the Tractor Unit
Removing the Control Panel Board
3.2.3.3
3-8
Removing the Power Supply Board
I
3.2.3.1
3-7
Removing the Drive Board
Figure 3-1. Flowchart for Disassembling the Printer
3-4
1 o/9/91
3.2.1 Removing the Printhead
1.
2.
Remove the printer cover.
Remove the paper eject cover.
Figure 3-2. Removing the Printer and Paper Eject Cover
3.
4.
Remove the 2 screws that secure the printhead to the carriage. Lift out the printhead.
Disconnect the upper and lower FCCs from the printhead.
Printhead
Head Cable
Figure 3-3. Removing the Printhead
lW91
3.2.2 Removing the Printer Case
This section describes how to remove the front case and upper case.
3.2.2.1 Removing the Front Case
1.
2.
3.
Remove the printer cover.
Remove the CB (M3 X 8) screw securing the front case to the upper case.
Release the clips that secure the front case to the upper case. (The LQ-1170 has 3 clips.) Open the
front case. Disconnect connector CNl on the control panel board (CO80 PNL); then remove the front
case.
CB(M3X8)
Figure 3-4. Removing the Front Case
3.2.2.2 Removing the Upper Case
::
Remove the printer cover, the paper tension unit, the tractor, and the paper advance knob.
Remove the 2 CBS(C) (M3X12) screws that attach the optional interface card cover or remove the
2 thumb screws that attach the optional interface; then remove the cover or interface card.
CBS(C) (M3 X 12)
Figure 3-5. Removing the Optional Interface Card Cover
3.
4.
5.
Remove the front case, as described in Section 3.2.2.1.
Remove the 2 CBS(C) (M4 X 14) screws that secure the upper case to the lower case.
Remove the upper case.
3-6
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3.2.3 Removing the Circuit Boards
Some printers contain a separate driver board and main board; others contain a single board that combines
the functions of the driver board and main logic board. Sections 3.2.3.1 and 3.2.3.2 describe how to
remove the CO60 DRV board and CO60 MAIN board. Section 3.2.3.3 describes how to remove the CO61
MAIN board (LQ-1170 only) or the CO60 MAIN B board (defined at the factory either for the LQ-870 or the
LQ-1170). Section 3.2.3.4 describes removal of the CO60 PSB board, and Section 3.2.3.5 describes
removal of the CO60 PNL board.
3.2.3.1 Removing the Driver Board (CO60 DRV Board)
(This board is used with the CO60 MAIN board only. It is unnecessary with the CO61 or CO60 MAIN B
board.)
1. Remove the upper case, as described in Section 3.2.2.2.
2. Disconnect the cables from connectors CN2 - CN12 on the driver board.
3. Remove the 4 stoppers attached to the main board; then remove the driver board.
Stoppers
CO60 Oh Board
Figure 3-6. Removing the Driver Board
3-7
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3.2.3.2 Removing the Main Board (C060 MAIN Board)
1.
2.
3.
4.
5.
Remove the upper case, as described in Section 3.2.2.2.
Remove the mechanism unit, as described in Section 3.2.4.
Remove the driver board, as described in Section 3.2.3.1.
Disconnect CN4 and CN6 from the main board.
Remove the 3 CBB(C) (M3 X 12) screws and 2 CB (Ml X 8) screws that hold the main board to the
lower case: then remove the main board.
CBB(C) (M3 x 12) Screws
CB(M3 - 8) Scre
CB
CO60 MAIN Board
Figure 3-7. Removing the CO60 MAIN Board
Assembly and Adjustment Note
After replacing the main board, you must adjust the bidirectional print position to ensure that bidirectional
printing is correctly aligned. (See Section 4.2.)
3-8
3.2.3.3 Removing the Main Board (C061 MAIN or C060 MAIN B)
1.
2.
3.
4.
5.
6.
Remove the upper case, as described in Section 3.2.2.2.
Remove the mechanism unit, as described in Section 3.2.4.
Remove 2 CBS M3 x 6 screws attaching the shield plate, and remove the shield plate.
Disconnect the cables from connectors CN4 through CN16 on the main board.
Remove the 2 CBS(B) M3 x 8 screws securing the interface ground plate.
Remove the 3 CBB M3 x 12 screws attaching the main board to the lower case. Then remove the
main board.
C B B (M3 X 1 2 )
CBS
(M3 >:
61
CBS [Mu3 x 8)‘SHlELD PLATE
Figure 3-8. Removing the CO61 MAIN or CO60 MAIN B Board
Assembly and Adjustment Note
After replacing the main board, you must adjust the bidirectional print position to ensure that bidirectional
printing is correctly aligned. (See Section 4.2.)
3-9
3.2.3.4 Removing the Power Supply Board (C060 PSB Board)
NOTE
To remove the C060 power supply board for replacement, you must use a special extractor tool, available
from Epson Parts Order Services. After obtaining this special tool, follow the procedure below.
fuming Tool Caver
Figure 3-9. Special Extractor Tool
1.
2.
3.
4.
Remove the upper case, as described in Section 3.2.2.2.
Remove the mechanism unit, as described in Section 3.2.4.
Disconnect the cable from CNl and CN2 on the PSB.
Remove the 2 CBS(C) (M3 X 12) one-way screws and the 2 CBS(O)(M3 X 8) one-way screws that
attach the power supply board to the lower case; then remove the power supply board.
CBB (M3“ 12)
I
CO60 PSB/PSE
Board
CSS(MSXS)(O)
CN2
‘CBB (M3X 12)
CBS(M3X8)(0 j
Figure 3-10. Removing the Power Supply Board
3-10
WI93
3.2.3.5 Removing the Control Panel Board (C060 PNL Board)
1.
2.
Remove the front case, as described in Section 3.2.2.1.
Remove the 5 CBS(C) (M3 X 12) screws that secure the control panel board to the front case; then
remove the control panel board.
CO60 PNL Board
Front Case
CBB(C)(MB x 10) Screws
Figure 3-11. Removing the Control Panel Board
3-11
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3.2.4 Removing the Printer Mechanism
1.
Remove the upper case, as described in Section 32.2.2.
2.
Remove the 2 CB (M3 X 6) screws that attach the frame to the right shield plate. Remove the shield
plate.
3.
If your printer contains a separate main board and driver board, disconnect the 2 flexible flat cables
(FFCs) from connectors CN3 and CN4 on the driver board. Then disconnect the cables for the
following CO66 DRV board connectors: CN5 (white, P-pin); CN6 (white, &pin); CN7 (black, 5-pin); CN8
(white, e-pin); CN9 (black, O-pin); CNlO (black, 3-pin); CNl 1 (blue, a-pin); and CN12 (white, 3-pin).
If your printer contains only a main board, disconnect the 2 FFCs from connectors CN3 and CN4 on
the CO61 MAIN board or the CO60 MAIN B board. Disconnect the cables for the following connectors
for the CO61 MAIN or CO60 MAIN B board: CN9, CNlO, CNll, CN12, CN13, CN14, CN15, and CN16.
4.
Remove the 4 CBB(C) (M4 X 15) screws that secure the printer mechanism to the lower case; then
remove the printer mechanism.
Right Shield Plate
I
CBS(C)
(M4x 14)
Figure 3-12. Removing the Printer Mechanism
Assembly and Adjustment Note
After replacing the printer mechanism, you must adjust the bidirectional print position to ensure that
bidirectional printing is correctly aligned. (See Section 4.2.)
3-12
3.2.5 Disassembling the Printer Mechanism
This section describes how to disassemble the main components of the printer mechanism.
3.2.5.1 Removing the Carriage Motor
1.
2.
3.
4.
5.
6.
Remove
Remove
Remove
Remove
Remove
Remove
the printer mechanism from the tower case, as described in Section 3.2.4.
the printer spring (778 gm) from the base frame.
the timing belt from the heft pulley.
the 2 mounting screws and the carnage motor frame as shown in Figure 3-13.
the 2 CB (M3 X 6) screws that hold the carnage motor to the carriage motor frame.
the carnage motor.
CR Motor Frame
\
~
BS(0) (M3 X 6)
crews
Figure 3-13. Removing the Carriage Motor
Assembly and Adjustment Note
See Section 3.2.5.13 for details on arranging and positioning the motor cable.
After removing the carnage motor from the carnage motor frame, you must adjust the carnage motor
backlash. (See Section 4.1.1.) You also must adjust the bidirectional print position to ensure that
bidirectional printing is correctly aligned. (See Section 4.2.)
3-13
6w93
3.2.5.2 Removing the Paper Advance Motor
1.
2.
3.
Remove the printer mechanism from the lower case, as described in Section 3.2.4.
Remove the 2 CBS (M8 X 10) that hoM the paper feed motor the right frame.
Remove the paper advance motor from the right frame.
aper Advance Motor
Figure 3-14. Removing the Paper Advance Motor
Assembly Note
See Section 3.2.5.13 for details on arranging and positioning the motor cable.
3.2.5.3 Removing the Flexible Flat Cable (FFC)
1.
2.
3.
4.
5.
Remove the printhead, as described in Section 3.2.1.
Remove the printer mechanism from the lower case, as described in Section 3.2.4.
Remove the FFC from the clips that hold it along the rear side of the printer mechanism. Make sure
that the FFC is free.
Remove the FFC from clip A on the head cable holder at the rear of the printer mechanism.
Remove the four clips that hold the head cable holder to the base frame. Remove the FFC and the
head cable holder.
v
FFC
Figure 3-15. Removing the FFC
Assembly Note
See Section 3.2.5.13 for details on arranging and positioning the FFC.
3-14
6/4J93
3.2.5.4 Removing the Carriage
1.
2.
3.
Remove the FFC, as described in Section 3.2.5.3.
Remove the timing belt from the carriage.
Remove the hexagon nut (M4) and gap adjustment lever. Use the box driver to rotate and free the
adjust bushing. Remove the bushing.
4. Remove the carriage guide shaft by pulling the carriage guide shaft a little to the right.
5. Remove the carnage.
Carriage Guide Shaft
Figure 816. Removing the Carriage
Assembly and Adjustment Note
After removing or rotating the adjusting bushing, you must adjust the platen gap (see Section 4.1.2).
3-15
6J4J93
3.2.5.5 Removing the Platen
1.
2.
3.
4.
5.
6.
7.
8.
Remove the printer mechanism from the lower case, as described in Section 3.2.4.
Remove the 2 CBS (M3 X 8) screws that secure the platen cover to the left and right frames. Remove
the platen cover.
Set the gap adjustment lever to 6. (The lever should be straight up.)
Remove the printhead, as described in Section 32.1.
Remove the ribbon mask holder from the carnage assembly.
Rotate the left platen shaft hoMer and slide it out of the frame to the left.
Rotate the right platen shaft holder and slide it out of the frame to the right.
Remove the platen.
C8P (C)
IM3 X 10) Screws
Figure 3-17. Removing the Platen
Assembly Note
When you insert the platen on the frame, make sure the platen gear meshes with the combination gear.
Do not force it into place. Mesh the gears into position first, then insert the platen into position.
- -
- Combination Gear
Platen Gear
Figure 3-18. Positioning the Platen Gear and Combination Gear
3-16
6w93
3.2.5.6 Removing and Disassembling the Right Frame
1.
2.
3.
4.
5.
Remove the printer mechanism from the lower case, as described in Section 3.2.4.
Remove the platen from the printer mechanism, as described in Section 3.2.5.5.
Remove the carriage motor from the base frame, as described in Section 3.2.5.1.
Remove the 4 CBS(C) (M3 X 10) screws that secure the right frame to the base frame. Remove the
right frame from the base frame.
Remove the following items from the right frame in this order: paper advance motor, tractor clutch cam,
cog (8.5 mm, 30 mm), cog (40 mm), plain washer, spring (20 gm), and cog (16 mm).
Tractor Cktch Cam
Paper Advance Motor
Figure 3-19. Disassembling the Right Frame
3.2.5.7 Removing and Disassembling the Left Frame
1.
2.
3.
4.
4.
5.
Remove the printer mechanism from the lower case, as described in Section 3.2.4.
Remove the platen from the printer mechanism, as described in Section 3.2.5.5.
Remove the timing belt from the mechanism.
Follow the instructions on removing the carnage, as described in Section 3.2.5.4, except for step 5.
Remove the platen gap sensor.
Remove the 4 CBS(C) (M3 X 10) screws that secure the left frame to the base frame. Remove the
left frame from the base frame.
Figure 3-20. Disasembling the Left Frame
3-17
3.2.5.8 Removing and Disassembling the Paper Guide Support Assembly
1.
2.
3.
4.
5.
Remove
Remove
Remove
Remove
Remove
the
the
the
the
the
printer mechanism from the lower case, as described in Section 3.2.4.
platen from the printer mechanism, as described in Section 3.2.5.5.
right frame from the base frame, as described in Section 3.2.5.6.
left frame from the bass frame, as described in Section 3.2.5.7.
paper guide support assembb.
Figure 3-21. Removing the Paper Guide Support Assembly
3.2.5.9 Removing and Disassembling the Carriage Guide Assembly
1.
2.
3.
4.
Remove
Remove
Remove
Remove
the
the
the
the
printer mechanism from lower case, as described in Section 3.2.4.
platen from the printer mechanism, as described in Section 3.2.5.6.
right and left frame, as described in Section 3.2.5.6 and 3.2.5.7.
carriage guide assembly.
Figure 3-22. Disassembling the Carriage Guide Assembly
3-18
6J4/93
I
Assembly Note
1 When you install the plain washer, insert it from the front in the direction indicated by the mark.
Plain Washer
\
Mark Side
Figure 3-23. Insertion Direction for Plain Washer
Paper Guide (Right Side)
Release Shaft
Figure 3-24. Inserting the Release Shaft
3-19
6/4/93
3.2.5.10 Removing the Home-Position Sensor
1.
2.
3.
Remove the printer mechanism from the lower case, as described in Section 3.2.4.
Remove the clips that secure the home-position sensor from the rear side of the base frame.
Remove the home-position sensor from the rear of the base frame.
Figure 3-25. Removing the HomePosition Sensor
3.2.5.11 Removing the Rear Paper-Out Detector
1.
2.
3.
Remove the paper guide support assembly, as described in Section 3.2.5.8.
Remove the clips that hold the rear paper-out detector in the paper guide.
Remove the rear paper-out detector.
Paper-Out Detector
Figure 3-26. Removing the Rear Paper-Out Detector
3-20
6J4t93
3.2.5.12 Removing the Front Paper-Out Detector
1. Remove the printer mechanism from the lower case, as described in Section 3.2.4.
2. Open the clips that hold the front paper-out detector to the base frame.
3. Remove the front paper-out detector.
Paper-Out Detector
Figure 3-27. Removing the Front Paper-Out Detector
3.2.5.13 Removing the Platen-Gap Sensor
1. Remove the printer mechanism from the lower case, as described in Section 3.2.4.
2. Remove the clips that hold platen-gap sensor to the left frame.
3. Remove the platen-gap sensor.
Platen-gap Sensor
Figure 3-28. Removing the Platen-Gap Sensor
3-21
3.2.5.14 Removing the Release Sensor
1. Remove the printer mechanism, as described in Section 3.2.4.
2. Remove the platen from the printer mechanism, as described in Section 3.2.5.5
3. Remove the right frame, as described in Section 3.2.5.6. (Follow steps 1 through 4.)
4. Unhook the release sensor from the paper guide.
Figure 3-30. Removing the Release Sensor
1 o/w93
3.2.5.15 Disassembling the Tractor Unit
1. Remove the tractor unit from the printer.
2. Remove the cog (17 mm) from the tractor shaft.
3. Remove the right tractor frame from the tractor shaft and the tractor guide shaft;
4. Remove E-ring 6 from the tractor shaft.
5. Remove the right tractor, the paper support unit, and the left tractor from the tractor shaft and tractor
guide shaft.
(17)
Figure 3-30. Disassembling the Tractor Unit
3.2.5.16 Arranging the Cables
When you assemble the printer, arrange the cables as shown in Figure 3-30.
n
Printer Mechanism (Bottom)
Figure 3-30. Arranging the Cables
3-23
10/9/91
CHAPTER 4
ADJUSTMENTS
4.1 ADJUSTING THE PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1 Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.2 Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 BIDIRECTIONAL PRINT POSITION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Overview of Bidirectional Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 Bidirectional Print Position Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-1
4-2
4-4
4-4
4-4
LIST OF FIGURES
Figure 4-1. Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-2. The Adjusting Bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-3. Platen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-i
4-1
4-2
4-3
1 o/9/9 1
4.1 ADJUSTING THE PRINTER MECHANISM
This section describes the various adjustments you may need to make to the printer mechanism.
4.1.1 Carriage Motor Backlash Adjustment
In the carnage motor backlash adjustment, the pinion gear of the carriage motor is meshed smoothly with the belt pulley
cog. If the pinion gear is poorly aligned, printer operation becomes noisy, and the accuracy of character alignment during
printing suffers.
1.
2.
3.
Remove the carriage motor, along with the carriage motor frame, from the printer mechanism (see Section 32!Y)
Loosen the two CBS(O) (M3 X 6) screws that hold the carriage motor to the carriage motor frame.
Check the alignment of the carriage motor pinion gear with the belt pulley cog. Move the carnage motor until there
is a gap of about 0.05 - 0.15 mm (0.002 - 0.006 inch) between the two. Tighten the 2 CBS(O) (M3 X 6) screws.
Figure 4-1. Carriage Motor Backlash Adjustment
4-1
1o/9/91
4.1.2 Platen Gap Adjustment
The platen gap adjustment must be done if any of the following conditions exist:
* The carriage guide shaft has be rotated or reassembled,
* The adjustment bushing has been rotated,
* The characters printed are consistently lighter on one side of the paper.
(To test, print 1-2 pages in LQ self-test with a new ribbon.)
1.
2.
3.
4.
5.
6.
7.
8.
Remove the printer mechanism from the lower case (see Section 3.2.4).
Remove the printhead from the carriage (see Section 3.2.1).
Remove the ribbon mask and the ribbon mask holder.
Reinstall the printhead. Do not connect the FCCs at this time.
Set the paper release lever to friction feed.
Move the carriage unit the printhead is at the 75th column for an 80column printer or at the 130th column for an
i36-column printer.
Use the 7mm box driver to loosen the hexagon nut (M4).
Insert a small screwdriver in the countersink of the carrier guide shaft and rotate until the platen gap is 0.38mm.
0.38
mm
-L
4
Platen
Figure 4-2. Platen Gap
9.
While holding the carrier shaft in the present position, set the gap adjustment lever to 0 (the second position from
the rear) and tighten the hexagon nut.
10. Move the printhead to the 5th column print position. Check the platen gap with the thickness gauge. It should still
be set to 0.38mm. If it is not, try rotating the parallel adjustment bushing. If you cannot set the gap to 0.38mm by
rotating the bushing, go back to step 7.
4-2
lcuw91
Left Frame
Figure 4-3. The Adjustment Bushing
11. Move the printhead to the middle of the carrier guide shaft and check the gap again. It should still be 0.38mm.
If it is out of adjustment go to step 7, otherwise go to step 12.
12. Remove the printhead, install the ribbon mask holder, and then replace the printhead.
13. Assemble the printer.
4-3
1019191
4.2 BIDIRECTIONAL PRINT POSITION ADJUSTMENT
This section describes how to adjust the bidirectional print position to ensure correct printing alignment.
4.2.1 Overview of Bidirectional Print Position Adjustment
This printer prints characters when the carriage is moving in either direction (i.e., from left to right or from right to left).
Adjustment is necessary to ensure that the printing of characters in one direction is properly aligned with the printing
of characters in the opposite direction. For example, if the the print position is out of alignment, printing of a vertical
line shows staggering because of the skew effect.
It is important to readjust the bidirectional print position if anything has been done to the gear arrangement that might
affect this printing alignment. By making the timing lag slightly during printing while the carriage moves from right to
the left, it is possible to line up printing done in this direction so that it will match printing done in the left-to-right
direction. The procedure to alter the timing is called the bidirectional print position adjustment.
The degree of bidirectional printing skew differs, depending on the unique characteristics of each printer mechanism.
For this reason, there is no standard skew correction value that can be applied to each printer. The unique skew
correction value for each printer has to be wriien to EEPROM on the main board.
Whenever the printer mechanism, or the main board itself, is changed during servicing, the bidirectional print position
must be readjusted and a new bidirectional skew correction value must be wriien to EEPROM.
4.2.2 Bidirectional Print Position Adjustment Procedure
Initial operation
Before performing the bidirectional alignment adjustment, complete the initial operation below:
* Position the adjustment lever at position 0.
* Verify that the DIP switch setting for high-speed draft is off (DIP switch 1-6 is on).
* Verify that the DIP switch setting for country is U.S. (DIP switches l-l, 1-2, and 1-3 are on, and 1-4 is off).
* Load paper.
* Feed at least 10 lines.
* Turn the printer off.
NOTE: The printer enters unidirectional printing mode automatically from the top of form to the line 10 position on the
paper, because this improves paper-feed accuracy, Therefore, you must perform the bidirectional alignment
adjustment after 10 lines or more have been fed.
Adjustment operation
The alignment procedure is as follows:
1.
Turn the printer power on while pressing the ALT, LWFF, and LOAD/EJECT buttons.
2.
The printer enters draft mode and prints the reference value and “I” characters for 4 lines.
4-4
Are the characters aligned vertically?
NO -> GO TO STEP 3.
YES -> GO TO STEP 4.
3.
Refer to the odd-numbered lines (1st and 3rd), and adjust the even-numbered lines (2nd and 4th).
* If the even-numbered lines are shifted to the right:
-> Press the LOAD/EJECT button once while pressing the ALT button.
(The reference value increases +l and even lines shift to the left.)
* If the even-numbered lines are ,shifted to the left:
->
Press the LF/FF button once while pressing the ALT button.
(The reference value decreases -1 and even lines shift to the right.)
4.
Press the ALT, LWFF, and LOAD/EJECT buttons at the same time.
5.
The printer enters LQ mode, and the printer prints the reference value and the “I” characters for 4 lines.
Are the characters aligned vertically?
NO -> GO TO STEP 6.
YES -> GO TO STEP 7.
6.
Refer to the odd-numbered lines (1st and 3rd) and adjust the even-numbered lines (2nd and 4th).
* If the even-numbered lines are shifted to the right:
->
Press the LOAD/EJECT button once while pressing the ALT button.
(The reference value increases +l and even lines shift to the left.)
* If the even-numbered lines are shifted to the left:
->
Press the LF/FF button once while pressing the ALT button.
(The reference value decreases -1 and even lines shift to the right.)
7.
Turn printer power off.
4-5
REV.-A
CHAPTER 5
TROUBLESHOOTING
5.1 OVERVIEW ................................................................................................5-1
5.2 REPAIR BY UNIT REPLACEMENT.. .................................................. 5-2
5.3 REPAIR OF THE POWER SUPPLY BOARD.. ................................. 5-14
5.4 REPAIR OF THE M A I N BOARD.. ....................................................... 5-16
5.5 REPAIR OF THE PRINTER MECHANISM.. ..................................... 5-19
LIST OF FIGURES
Figure 5-1.
Troubleshooting Procedure.. ............................................... 5-1
Figure 5-2.
Printhead Resistance.. .......................................................... 5-8
LIST OF TABLES
Table 5-1.
Motor and Printhead Coil Resistance.. .............................. 5-1
Table 5-2.
Error Displays ..............................................................................5-1
Table 5-3.
Symptoms and Reference Pages.. ....................................... 5-2
Table 5-4.
Repair of the Power Supply Board ..................................... 5-14
Table 5-5.
Repair of in the Main/Drive Circuit Board.. ..................... 5-16
Table 5-6.
Repair of the Printer Mechanism.. ...................................... 5-19
5-i
..
Ii
12/4/92
5.1 OVERVIEW
Use the procedures described in this chapter to help identify problems in the printer based on the symptoms that these
problems may produce.
START
5-2
5.2
Repair by
unit replacement
5-16
5.4
5-14
5.3
Repair of the printer
mechanism
Repair of the
main/drive board
Repair of the
power supply board
5-19
5.5
I
I
The fault is corrected
Figure 5-1. Troubleshooting Procedure
The following tables provide troubleshooting information.
Table 51. Motor and Printhead Coil Resistance
Part
Specifications
Carriage motor
Coil resistance - 5.0 ohms f 7% at 77’ F (25’ C)
(pin 1 = CRA, pin 2 = CR-A, pin 3 = CRB, pin 4 = CR-B, pin 5 = common)
Paper-feed motor
Shinano Kenshi motor:
Coil resistance - 56.0 f 4 ohms at 77” F (25’ C)
Seiko Epson motor:
Coil resistance -5l.Of4ohmsat77”F(25”C)
(pin I = PFA, pin 2 = PF-A, pin 3 = PFB, pin 4 = PF-B, pin 5 = common)
Printhead
Coil resistance - 16.7 f 2.0 ohms at 77’ F (25’ C) (See page 5-7 for information.)
Table 5-2. Error Codes
Error Display
Error
Cause
Buzzer beeps 3 times for
0.1 second, with
0.1-second intervals.
Paper-out error
l
Buzzer beeps 5 times for
0.5 second, with
0.~second intervals.
Carriage error
l
Printer is out of paper.
Paper-end sensor is abnormal.
l
l
l
5-1
Carriage motor malIunction.
Carriage mechanism malfunction.
Carriage motor driver malfunction.
REV.-A
5.2 REPAIR BY UNIT REPLACEMENT
For most problems, it is sufficient for you to determine the difficulty to the unit level. Refer to Table
5-3, identify what the problem is, then perform the checks according to the corresponding flowchart.
Table 5-3. Symptoms and Reference Pages
Symptom
Problem
See Page
Printer fails to operate when
power is on.
. Carriage does not move.
. Control panel indicator lamp does not light.
5-3
Carriage operation is abnormat.
. Carriage moves away from home position at power
on.
. The carriage returns to the home position correctly,
but the printer then fails to enter the READY mode.
5-4
Printing is faulty during selftest, but carriage operation is
normal.
. No printing at all.
. Faulty printing-some of the dots are not printed.
5-5
Paper feeding is abnormal.
. No paper is fed.
. Regular paper feed, but with variations in the separations between lines.
5-9
Control panel operation is
abnormal.
. When the LF switch is activated, no paper is fed.
5-12
Printing of data sent by the
host computer is faulty.
. Carriage operates normally at power on, and self-test
is executed correctly.
. Print data from the computer, however, is not printed
correctly.
5-13
5-2
1o/9/91
(1) Printer Fails to Operate when Power is On
Y
START
Yes
Yes
Measure the
resistance of the
carriage motor,
PF motor and
pr i nthead
Replace FIJI and
power on again
S e e S e c t i o n 5.5,
repair of the
printer
mechanism
Yes
See Section 5.4,
the repair of
the main board
and DRV board
No
Yes
Replace
pluggable
chips
0
END
5-3
Replace the
Pow;;,;~““”
1o/9/9 1
(2) Carriage Operation is Abnormal
0
START
No
mechanism inserted
properly into
Secure
connectors
Yes
a-+
nave t o t h e
home position?
No
Yes
See Section
5.5, Repair
of the
printer
mechan i sm.
See Section 5.4,
Repair of the
main/drive boards
Do the final
7
A
0
Check for
circuit board
damage before
re-installing the
printer mechanism
corrected?
confidence test.
END
0
5-4
No
10/9/91
(3) Printing is Faulty During Self-Test, but Carriage Operation is Normal
START
?
do necessary
adjustments.
See Ch. 4 for
Verify the
continuity of CN4
B CN3 and that
they are securely
connected.
I
Measure
See CH. 4,
do necessary
adjustments
Replace CN4
and/or CN3 if
necessary and
perform self test
printhead
resistance
Replace printhead
and DRV board
Replace
printhead
1
*
5-5
10/9/91
Yes
NO
R e p l a c e pluggable
chips on
main board
5-6
6/5/92
Wire Assignments)
C o i l Reslrtanco-
1 6 . 7 k 1 . 7 o h m s (at 770 F , 280 C)
between the coil and
corrospondlng common pln.
(3, 7,
I
11, 1%
(14, 22, 19, 23)
R
5-7
(2, 6,
10, 18,
615192
16.7 f 1.7
Coil Resistance:
Thermistor Resistance: 9.4 f 0.94K ohms
Rear Connector
Test Point 1 I Test Point 2
c3
C6
c2
3, 7, 11, 15
I
I
14, 22, 19, 23
2, 6, 10, 18
Front Connector
Test Point 1
Test Point 2
C5
5, 9, 13, 17
c4
4, 12, 20, 21
Cl
1, 8, 16, 24
REV.-A
(4) Paper Feeding is Abnormal (but Printing is Normal)
Yes
Load the paper correctly.
I
c>
A
Refer to section 5.5,
Repair of the printer
mechanism.
I
I
Replace the main board.
paper-feed motor
Replace the main board.
fault corrected?
I
L7
7
r
Refer to section 5.5,
Repair of the printer
mechanism.
Replace the main board
and the paper-feed motor.
I
I
END
v
END
*
5-9
REV.-A
1C h e c k motyr r e s i s t a n c e . ]
neplace m o r o r ana
main logic board.
No
NOTE
Check motor resistance.
Perform final
test.
NOTE : Perform bidirectional print alignment adjustment.
5-10
REV.-A
Check left and
right tractors for
proper phasing.
Yes
LIean o r r e p l a c e .
Adjust phasing
or replace sprocket
assemry.
Inspect paper
path.
Reform final
test.
5-1 1
REV.-A
(5) Control Panel Operation is Abnormal
fault corrected?
I
Replace the main board.
END
L7
5-l 2
Replace the control panel
board.
REV.-A
(6) Printing of Data Sent by the Host Computer is Faulty
NOTE: It is assumed here that the host computer is operating normally.
[ P e r f o r m s e l f ;st p r i n t i n g . 1
Refer to other troubleshooting
+iGkQ.yy
Replace the connection cable
from the host computer.
fault corrected?
Replace the main board.
I
5-13
REV.-A
5.3 REPAIR OF THE POWER SUPPLY BOARD
This section describes problems that indicate that the power supply board is defective, and it provides
various symptoms, likely causes, and checkpoints. Checkpoints refer to power waveforms, resistance
values, and other values to be checked to evaluate the operation of any component that might be bad.
Check these values and take the appropriate action.
WARNING
The power switch for this printer controls the secondary (AC) power circuit. The primary (AC) circuit
is continually active as long as the printer is connected to AC power.
Table 5-4. Repair of the Power Supply Board
Condition
iormal.
Cause
Checkpoint
Action
Table 5-4. Repair of the Power Supply Board (Continued)
5-15
REV.-A
5.4 REPAIR OF THE MAIN/DRIVE BOARD
This section provides instructions for repairing the main board when it is defective and describes various
symptoms, likely causes, and checkpoints. Checkpoints refer to proper waveforms, resistance values,
and other values to be checked to evaluate the operation of any component that might be @ad. Check
these values and take the appropriate action.
Table 5-5. Repair of in the Main/DRIVE Circuit Board
Problem
Symptom
Cause
Checkpoint
Solution
he printer
does not oprate at all.
The CPU does
not operate.
The reset circuit is not
operational.
Check the voltage waveforms for the + 5V
line (IC5C pin 7) and for the THLD signal
(IC4B pin 10) when power is on.
Replace lC4B.
IC5C.
Check the voltage waveforms for the
THLD signal (IC4B pin 10) and for the
RESET signal (IC4B pin 12) when power
is on.
Replace IC4B.
Check pin 2 1 of IC 1C for the Vxvoltage
(NMI signal HIGH).
Replace IC2C.
Check pin 71 of IC4B for a change in the
signal HIGH/LOW.
Replace IC4B.
Selection of
control ROM
is abnormal.
5-16
REV.-A
Table 5-5. Repair of in the Main/Drive Circuit Board (Continued)
Problem
The printer
does not operate at all.
The carriage
operates
abnormally.
Symptom
Cause
The CPU does
not operate.
Either ROM or
RAM is
defective.
The carriage
does not operate at all.
Checkpoint
Solution
Replace IC3A
or IC4A.
The CPU is
defective.
Check the oscillator signal at either pin 33
or pin 34 of the CPU.
If a signal is
detected, replace IC2C.
Otherwise, replace CR 1.
IC2C is
defective.
Check the CR motor phase signal at pins
9, 10, 1 1, and 12 of IC2C.
Replace IC2C.
IC15 is
defective.
At IC15, check the input signal for pin 6
and the output waveform for pin 8.
Replace IC 15.
Carriage oper- IC152A is
ation is unstadefective.
bfe (lack of
torque).
Replace IC 15.
5-17
REV.-A
Table 5-5. Repair of in the Main/Drive Circuit Board (Continued.)
Problem
Symptom
Cause
Checkpoint
Self-test printing is
abnormal.
Self-test is
not executed.
The CPU can’t
measure the
voltage on
the +35V
line.
Measure the voltage at Vref (pin 1) of
IC2C. The normal voltage is 4.741 V.
IC4B is
defective.
At IC4B, check the input signal at pin 10 1
and the output signal at pin.
Solution
Replace IC4D.
A particular
dot is not being printed.
IC28 is defective. IC8-IC 13
are defective
Replace
IC2A.Replace
IC8-IC 13
Paper is not
fed normally.
The paper
does not
feed, or the
feed pitch is
abnormal.
IC20 is
defective.
Replace IC20.
Printing of data from the
host computer is faulty.
Data corruption occurs
when the parallel interface
is used.
IC46AD or
IC4B is
defective.
Replace IC6A
or IC4B.
5-18
REV.-A
5.5 REPAIR OF THE PRINTER MECHANISM
for detailed procedures for replacing or adjusting parts, refer to Chapter 3, Disassembly and Assembly,
and Chapter 4, Adjustment. If a problem or symptom recurs following an attempted repair, refer to Table
5-5 to try to find other potential causes.
Table 5-6. Repair of the Printer Mechanism
Solution
Problem
Symptom
Cause
Checkpoint
The carriage motor
fails to operate.
The carriage motor
completely fails to
activate at power
on.
Foreign substances
are lodged in the
gears or elsewhere
in the mechanism.
Manually move the
timing belt to see if
this causes the motor to rotate.
Remove any foreign substances.
The carriage motor
is defective.
Measure the coil resistance of the motor. The resistance
should be about
5.0 ohms.
Replace the carriage motor.
The belt pulley is
defective.
Check for broken
or worn pulley.
Replace the belt
pulley.
The timing belt is
defective.
Check that the timing belt is correctly
inset-ted into the
bottom of the
carriage.
Reinsert the timing
belt.
Check for a broken
timing belt.
Replace the timing
belt.
The carriage does
not operate normally at power on
(after the carriage
has been manually
centered prior to
power on).
Self-test printing
does not execute.
The carriage motor
rotates, but the
carriage does not
move.
The carriage
moves left slightly,
then stops.
Carriage movement is not
smooth.
Check whether the
carriage moves
smoothly when
moved manually.
Clean and
lubricate.
The carriage
moves to the left
or right end, then
stops.
The home position
sensor is defective.
Use a multimeter to
check the home-position sensor.
Replace the homeposition sensor.
The carriage
moves, but no
printing is
performed.
The printhead FFC
common wires are
disconnected.
Check the common
wires for the printhead FFC.
Replace the FFC.
5-19
12Af92
Table 5-6. Repair of the Printer Mechanism (Cont.)
Problem
M-test printing is
rbnormal.
Wmptom
A particular dot fails
to print.
Cause
Measure the coil
resistance of the
printhead. The normal
value is approximately
16.7 ohms.
Replace the
printhead.
Check whether the dot
wire is worn.
Replace the
printhead.
Check whether the tip
of the dot wire is worn.
Replace the
printhead.
Set the gap adjust lever
to the second position,
and check the gap
between the tip of the
printhead and the
platen.
The appropriate value is
0.38 mm.
Adjust the gap.
Refer to Section
4.1.2, Platen Gap
Adjustment.
A foreign substance
is lodged in the paper
path.
Perform a visual check
of the paper path.
Remove any foreign
substance.
The paper-feed motor
is not driving the gear
correctly.
Check that no foreign
substance is lodged
between the gears, and
that the gears are not
broken or worn.
Remove any
foreign substance.
l Replace the
paper-feed
reduction gear.
l Replace the platen
gear.
The paper-feed motor
is defective.
Measure the coil
resistance for the
paper-feed motor.
The approximate value
should be 56 ohms (for
the Shinano Kenshi
motor) or 51 ohms (for
the Seiko Epson motor).
Replace the paperfeed motor.
The printhead is
defective.
The printing is too
The printhead is
light, or the print
defective.
density is not uniform. L
The platen gap is not
properly adjusted.
Paper feeding is
abnormal.
Printing is performed,
but the paper is not
fed, or is not fed
uniformly.
Solution
CheckPoint
5-20
l
REV.-A
Table 5-6. Repair of Printer Mechanism (Continued)
Problem
The ribbon feed is
abnormal.
Paper becomes
stained.
Printing continues
after the paper
ends or when no
paper is loaded.
Cause
Checkpoint
Solution
The ribbon cartridge is defective.
Dismount the ribbon cartridge, rotate its knob manually, and check
whether the ribbon
feeds normally.
Replace the ribbon
cartridge.
Foreign substances
are caught in the
gears.
Check whether the
ribbon driving gear
rotates when the
carriage is moved
manually.
. Remove any foreign substance.
. Replace the ribbon-feed
mechanism.
The ribbon feeds
properly only when
the carriage moves
in one direction
(i.e., it fails to feed
when the carriage
moves in the other
direction).
The planetary lever
is defective.
Move the carriage
manually, and
check whether the
planetary lever
turns in reverse
and engages the
gear.
Replace the ribbonfeed mechanism.
Ink stains appear
on areas where
there is printing.
The ribbon mask is
not correctly
positioned.
Check whether the
ribbon mask is in
the correct
position.
Reinstall the ribbon
mask.
The platen gap is
not adjusted.
Set the gap adjust
lever to the second
position, and check
the gap between
the tip of the printhead and the
platen.
The appropriate
value is 0.38 mm.
Adjust the gap.
Refer to Section
4.1.2, Platen Gap
Adjustment.
The paper-end sensor is defective.
Check the paperend sensor switch.
Replace the paperend sensor.
Symptom
The ribbon is not
fed.
Printing continues
past the paper
end.
5-21
REV.-A
CHAPTER 6
MAINTENANCE
6.1
PREVENTIVE MAINTENANCE ............................................................. 6-1
6.2 LUBRICATION A N D ADHESIVE APPLICATION.. .......................... 6-1
LIST OF FIGURES
Figure 6-1. Correct Adhesive Application .................................................. 6-2
Figure 6-2. LQ-870 Lubrication Points.. ...................................................... 6-3
Figure 6-3. LQ-1 1 7 0 Lubrication Points ..................................................... 6-4
LIST OF TABLES
Table 6-1. Lubricants and Adhesive ........................................................... 6-1
Table 6-2. Lubrication Points.. ...................................................................... 6-2
Table 6-3. Adhesive Application Point ...................................................... 6-2
6-i
REV.-A
6.1 PREVENTIVE MAINTENANCE
Preventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as well
as occasional vacuuming of the mechanism’s interior to remove dust and paper debris. After cleaning
the unit, check that it is adequately lubricated (as described in Section 6.2, below.) Before returning
the printer to the customer, inspect the springs, paper-feed rollers, and basic operation.
CAUTION
Disconnect the printer from the external AC power source before performing maintenance. Do not
use thinner, trichloroethylene, or ketone-based solvents on the piastic components of the printer.
6.2 LUBRICATION AND ADHESIVE APPLICATION
EPSON recommends that the printer be lubricated at the points illustrated in Figure 6-2. Table 6-2 lists
each point together with its recommended lubricant. The three recommended lubricants are EPSON
O-2, G-20, and G-26, all of which have been tested extensively and found to comply with the needs
of this printer. (Table 6-l provides details about these lubricants.) Before applying a lubricant, be sure
that the surface to be lubricated is clean. Do not apply too much lubricant, as this may damage related
parts.
Adhesive application is necessary at the point described in Table 6-3. Figure 6-l indicates the point
at which adhesive must be applied following disassembly or replacement. EPSON recommends that
Neji lock #2 (G) adhesive be applied to the point illustrated. Avoid overflow to adjacent parts.
Table 6-1. Lubricants and Adhesive
Type
Oil
Grease
Grease
Adhesive
Name
o-2
G-20
G-26
Neji lock #2 (G)
Quantity
40 cc
40 gm
40 gm
1000 gm
Availability
E
E
E
E
Part No.
8710200001
B702000001
8702600001
8730200200
E: EPSON-exclusive product
6-1
REV.-A
Table 6-2. Lubrication Points (Refer to Figure 6-2)
Ref. No.
Lubricant
Lubrication Points
1
l/4 of the perimeter of the top edge of the gear (8.5 mm, 30 mm)
G-26
2
l/3 of the perimeter of the top edge of the gear (40 mm)
G-26
3
l/3 of the perimeter of the top edge of the platen gear
G-26
4
Portion of carriage that contacts base frame
G-26
5
Oil pad
6
Gear (40 mm) shaft
G-26
7
Gear (40 mm) shaft
G-26
8
Portion of paper guide that contacts sub paper guide
G-26
9
Portion of paper tension roller shaft that contacts paper tension frame
G-26
10
Portion of tractor shaft that contacts tractor frame (left)
G-26
11
Ribbon planetary lever
G-26
o-2
NOTE: Lubrication must be applied during the reassembly process.
Table 6-3. Adhesive Application Point (Refer to Figure 6-l.)
I
Adhesive Application Point
Portion where timing belt engages the
carriage
/ No. of Points
1
Figure 6-1. Correct Adhesive Application
6-2
I
REV.-A
Figure 6-2. LQ-870 Lubrication Points
6-3
REV.-A
Figure 6-3. LQ-1170 Lubrication Points
6-4
APPENDIX
A.1 CONNECTOR S U M M A R Y ................................................................. A-1
A.2 CIRCUIT DIAGRAMS ........................................................................... A-9
A.3 CIRCUIT BOARD COMPONENT LAYOUT.................................... A-15
A.4 EXPLODED DIAGRAM.. ....................................................................... A-20
A.5 CASE OUTLINE DRAWING.. .............................................................. A-25
LIST OF FIGURES
Figure A-1.
Cable Connections.. .............................................................. A-1
Figure A-2.
C 0 6 0 M A I N Board Circuit Diagram ............................... A-9
Figure A-3.
C 0 6 0 DRV Board Circuit Diagram.. ............................... A-11
Figure A-4.
C 0 6 0 PS8 Board Circuit Diagram.. ................................. A-12
Figure A-5.
C060 PSE Board Circuit Diagram ................................... A-13
Figure A-6.
C 0 6 0 PNL Board Circuit Diagram.. ................................. A-14
Figure A-7.
C 0 6 0 M A I N Board Component Layout.. ....................... A-15
Figure A-8.
C 0 6 0 DRV Board Component Layout........................... A-16
Figure A-9.
C060 PSB Board Component Layout............................. A-17
Figure A-10. C060 PSE Board Component Layout ............................. A-18
Figure A-11. C 0 6 0 PNL Board Component Layout............................. A-19
Figure A-12. Exploded Diagram for L Q - 8 7 0 / 1 1 7 0 ............................. A-20
Figure A-13. Exploded Diagram for Model-5Dl0/5D60.. .................. A-22
Figure A-14. Case Outline Drawing ......................................................... A-25
LIST OF TABLES
Table A-1. Board Connector Summary. . . . . . , . . . , . , . . . , . , A-3
TableA-2. CN1 (C080, C061, and C080 MAIN B) . . . . . . . . . . . . , . A-4
TableA-3. CN2 (CO60, CO81,and CO80 MAIN B) . , . . . . . , . . . . . , A-4
TableA-4. CN3(CO8O,CO81,andC080 MAlNB). . . . . . . . . . . . . . A-5
Table A-5. CN4 (CO80 MAIN) and
CN8(CO61,andC060MAlNB). . . . . . . . . . . . . . . . . . . . A-5
Table A-6. CN5 (CO80 MAIN only) . . . . . . . . . . . . . . . . . . . . . . A-6
Table A-7. CN6 (CO80 MAIN and
CN4 (CO81 MAIN and CO80 MAIN B) . . . . . , . . . . . , . . , . A-8
A-i
Table A-8. CN1 (CO60 DRV only) . . . . . . . . . . . . . . . . . . . . . . .
Table A-9. CN2 (CO60 DRV) and
CN7(CO61 MAIN and CO60 MAIN B) . . . . . . . . . . . . . . . .
Table A-10. CN3 (CO60 DRV) and
CN5(CO61 MAlN and CO6O MAlN B). . . . . . . . . . . . . . . .
Table A-11. CN4 (CO60 DRV) and
CN6(CO61 MAlN and CO6O MAlN B). . . . . . . . . . . . . . . .
Table A-12. CN5 (CO60 DRV) and
CN9(CO61 MAlN and CO6O MAlN B). . . . . . . . . . . . . . . .
Table A-13. CN6 (CO60 DRV) and
CN1O (CO61 MAIN and CO80 MAIN B) . . . . . . . . . . . . . . . .
Table A-14. CN7 (CO60 DRV) and
CN11 (C061 MAlN and C060 MAlN B). . . . . . . . . . . . . . . .
Table A-15. CN8 (CO60 DRV) and
CN12 (CO61 MAlN and C060 MAlN B). . . . . . . . . . . . . . . .
Table A-16. CN9 (CO60 DRV) and
CN14 (CO61 MAIN and CO60 MAIN B) . . . . . . . . . . . . . . . .
Table A-17. CNlO (CO60 DRV) and
CN13 (CO61 MAIN and CO60 MAIN B) . . . . . . . . . . . . . . . .
Table A-18. CN11 (CO60 DRV) and
CN15 (CO81 MAIN and CO60 MAIN B) . . . . . . . . . . . . . . . .
Table A-19. CN12 (CO60 DRV) and
CN16(CO61 MAlNandCO8OMAlNB). . . . . . . . . . . . . . . .
Table A-20. CN1 (CO60 PSB Board). . . . . . . . . . . . . . . . . . . . .
Table A-21. CN2 (CO60 PSB Board). . . . . . . . . . . . . . . . . . . . .
Table A-22. CN1 (CO60 PNL Board. . . . . . . . . . . . . . . . . . . . .
Table A-23. Part Number Reference Table. . . . . . . . . . . . . . . . .
A-ii
A-7
A-7
A-8
A-8
A-8
A-8
A-8
A-8
A-8
A-8
A-8a
A-8a
A-8a
A-8a
A-8a
A-24
A.1 CONNECTOR SUMMARY
Figure A-l illustrates the interconnection of major components. Table A-l summarizes the
functions and sizes of the connectors.
AC INPUT
r
POWER
_ swd
1
(SPIN)
IBP ‘Nl
-
r
PSB
Board
RELEASE
LEVER
CF MOTOR
CR MOTOR
l4EA.D
HEAD
(2PIN)lSPlN;
W
-
-2
1
ISPIN)(17~&Ml5~~N&
W
D R V BOJMI
GAP
PElFROb
PEIREARI
HOME
1L
COOLING FAN
PNL
Board
Figure A-1. Cable Connections
A-l
Prinltr
HtChJnrtm
6Ml93
1
E
8 8
m
I
~
I .
am
c050 PSB
1
COMMAIN
COWMAINB
ROM
Illh ..-. CJrwoe
I
.-’ Type B
M Card IOtir
i
T
u-l
B
I
.......
. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OAP
HP
Pi2
Pi1
UeJdnJJd
CR
PF
. . . . ..e.
:
.
:
FWa m
M&r
Mo(or
Lovw
(17 Pm (15 P m
1-j (f-1
-.............+....................................................................................,
PritierMechaniun(MSD1015D80)
Figure A-1. Cable Connections (Continued)
A-2
:
:
6l493
Table A-1. Board Connector Summary
Board
CN No.
No. of Pins
Function
CO61 MAIN and
CO60 MAIN B board
(include driver
board functions)
CNl
CN2
CN3
CN4
CN5
CN6
CN7
CN8
CN9
CNlO
CN11
CN12
CN13
CN14
CN15
CN16
36
36
60
10
15
17
4
4
2
5
5
2
3
2
2
3
Parallel interface
Optional interface
Optional font cartridge
Control panel
Printhead R side
Printhead L side
Power supply (+35 V)
Power supply (+5 V)
Fan motor
Carriage motor
Paper feed motor
Release lever
Home position sensor
Platen gap sensor
PEl sensor (front)
PE2 sensor (rear)
CO60 MAIN Board
CNl
CN2
CN3
CN4
CN5
CN6
36
36
80
4
80
10
Parallel interface
Optional interface
Optional font cartridge
Power supply (+5 VDC)
Drier board
Control panel
CO60 DRV Board
CNl
CN2
CN3
CN4
CN5
CN8
CN7
CN8
CN9
CNlO
CNll
CN12
60
4
15
17
2
5
5
2
2
2
2
3
Main board
Power suppty (+5 and +35 VDC)
Printhead R side
Printhead L side
Fan motor
Carriage motor
Paper feed motor
Release lever
Platen gap sensor
Home position sensor
PEl sensor (front)
PE2 sensor (rear)
CO60 PSB Board
CNl
CN2
2
8
AC power supply
+5 V and +35 V supply
NOTE:
Some versions of this printer contain a separate main board (CO60 MAIN) and driver board (CO80 DRV).
In newer versions the main and drier board functions are combined on a single board (CO81 MAIN and
CO60 MAIN B).
A-3
Table A-3. CN2 (CO60, CO61, and CO60 MAIN B)
Table A-2. CN1 (CO60, C061, and CO60 MAIN B)
No. ~I/O i Signal Name
1
2
~
/
I
I
i
:
i
5 : I
6 ’ I
7
I
8
I
9
I
10
0
11 I 0
12
0
13 ! 0
14 / I
15 i
16117 1 18
19
20
21
22
23
24
25
26
27
28
29
30 iI 31 I I
32
0
33
34
35
36
I
No. I I/O ’ Signal Name
1
:
2
3
4
I
5 ;
6 ’
7
8 1
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
STROBE
DATA 1
~DATA2
’ DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
ACKNLG
BUSY
PE
SLCT
AUTOFEEDXT
GND
FGND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
INIT
ERROR
GND
SLCT-IN
A-4
0
0
0
0
0
0
0
0 j
I
0
0
I
I
I
0
0
0
-
0
0
0
0
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
t5v
+5v
,+5v
-5v
i+5V
j+5V
ITXD
READY
RXD
RST
INH
CMREQ
WRREQ
RDREQ
WR
iiF
cs
GND
GND
GND
GND
GND
GND
A3
A2
Al
A0
D7
D6
D5
D4
D3
D2
Dl
DO
Table A-4. CN3 (CO60, CO81, and CO80 MAIN B)
1
No.
No. ) I/O 1 Signal Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
0
I 0
~ 0
I 0
0
0
0
0
0
1 0
! 0
1 0
/ 0
/ 0
0
0
0
0
0
0
0
0
0
0
0
0
0
2810
29
0
30 / 0
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
;+5v
/ +5v
i+5v
- PREQ
-CNT
-PROG
-RAM
-CG
-WR
CGA18
-RD
CGA13
14
RAM14
15
16
CGA16
RAM16
CGA17
A0
Al
A2
A3
A4
A5
A6
A7
A8
+5v
+5v
Table A-5. CN4 (CO60 MAIN) and CN8 (CO81 MAIN and CO80 MAIN B)
T-r-!
No.
1
2
3
4
I/O S i g n a l N a m e
I
-
+5v
+5v
GND
GND
A-5
I/O ’ Signal Name
i / --
;ND
;ND
SND
‘ROGA 16
-MREQ
PROGA 15
PROGA 14
CGA22
21
20
19
PROGA 13
RAMA 13
A9
A10
N.C
Al 1
N.C
Al2
D7
D6
5
4
3
2
1
0
GND
GND
GND
Table A-6. CN5 (CO60 MAIN only)
No. ( I/O / Signal Name
No. I I/O I Signal Name
1
2
3 /o
4
lo
5
0
6
0
7
0
8
0
9
0
10
0
11
0
12
0
13
0
14
0
15
0
16
0
17
0
18
0
19
0
20
0
21
0
22
0
23
0
24
0
25
0
26
0
27
0
28
I
29
0
30
0
31 j32
33
0
34
0
35
0
36
0
37
0
38
0
39
0
40
0
41
0
42
0
43
0
44
0
45
0
46
0
47
0
48
0
49
0
50
-
51
52
53
54
55
56
57
58
59
60
I El:
H16
H18
Hll
H2
H19
H24
H14
H4
Hl
H21
l k5V
+5v
+5v
+5v
+35v
+35v
PPO
-M
PF COM
-HOLD
-B
+5v
PFB
-PFB
PE3 N.C
T
vu
vu
GND
GND
H23
H6
HlO
H22
H7
H3
H9
H17
H12
H16
H8
H20
H13
H5
i5v
+5v
-L
GND
0
0
0
) LEVER
/B
, -A
PFA
-PFA
PEl
PE2
CR HOME
GND
GND
1
Table A-7. CN6 (CO60 MAIN) and CN4 (CO61 MAIN and CO60 MAIN B)
I/O S i n g l e
1
2
3
4
5
6
7
8
9
10
A-6
I
0
0
0
I
I
0
-
PAUSE
GND
TXS
LDLED
CKS
LDSW
RXS
+5 v
GND
~GND
Table A-8. CNl (CO60 DRV only)
No. I II/O I
i
I.
1
2 i.
I
3
I
4
I
5
I
6
H19
7
I
8
I
9
I
10
I
11
I
12
I
13
I
14
I
15
I
16
I
17
I
18
I
19
I
20
I
21
I
22
I
23
I
24
I
25
I
26
I
27
0
28
I
29
I
30
31
32
I
33
I
34
I
35
I
36
I
37
I
38
I
39
I
40
I
41
I
42
I
43
I
44
I
45
I
46
I
47
I
48
I
49
50
Signal Name
1GND
/ GND
H16
H18
Hll
H2
H24
H14
H4
Hl
H21
+5v
+5v
+5v
+5v
+35v
+35v
PPO
-M
PF COM
-HOLD
-B
+5v
PFB
-PFB
PE3 N.C
T
vu
vu
GND
GND
H23
H6
HlO
H22
H7
H3
H9
H17
H12
H16
H8
H20
H13
H5
+5v
+5v
-L
GND
No.
I/O
51
52
53
54
55
56
57
58
59
60
I
I
I
I
I
0
0
0
Signal Name
: LEVER
B
I -A
j PFA
-PFA
PEl
PE2
CR HOME
GND
1 GND
L
Table A-9. CN2 (CO60 DRV) and CN7 (CO61 MAIN and CO60 MAIN B)
-H-l
No.
1
2
3
4
A-7
I/O
Signal Name
0
0
0
0
GND
GND
+35v
+35v
iw93
Table A-13. CN6 (CO60 DRV) and
CNlO (CO61 MAIN and CO60 MAIN B)
Table A-10. CN3 (CO60 DRV) and
CN5 (CO61 MAIN and CO60 MAIN B)
No.
1
I/O
1
2
3
4
I
j
I
(
0
0
0
;
H3
HI1
/ H2
/ H19
zi
7
8
9
10
11
12
13
I
0
0
0
0
0
0
0
0
2
C6
c2
H22
H15
H18
H23
HlO
14
15
/
j
/
:
i
No.
Signal Name
I/O
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
0
0
0
0
0
0
0
0
0
0
0
0
0
0
I
I
0
!
I
i
I/O
1
2
0
0
Signal Name
~
Table A-14. CN7 (CO80 DRV) and
CNll (CO61 MAIN and CO80 MAIN B)
No.
d
4
5
1 Fii”
Signal Name
I/O
0”
0
0
0
I
1
1
f;;
PF-B
PFCOM
Table A-15. CN8 (CO60 DRV) and
CN12 (CO61 MAIN and CO60 MAIN 8)
Signal Name
H5
Hl
H13
H9
H21
H17
c5
c4
Cl
H24
H20
H12
H8
H15
T
T
H4
No.
I/O
Signal Name
Table A-16. CNQ (CO60 DRV) and
CN14 (CO61 MAIN and CO80 MAIN B)
No.
1
2
I/O
j
I
Signal Name
GND
GSW
Table A-17. CNlO (CO60 DRV) and
CN13 (CO81 MAIN and CO60 MAIN B)
Table A-12. CN5 (CO60 DRV) and
CNS (CO61 MAIN and CO60 MAIN B)
No.
I/O
CRA
CR-A
CRB
CR-B
CRCOM
Table A-l 1. CN4 (CO50 DRV) and
CN6 (CO61 MAIN and CO60 MAIN B)
No.
~
+35v
GP
A-8
No.
I/O
1
2
3
0
I
Signal Name
LED
GND
CR HOME
I
Table A-l 8. CNl 1 (CO80 DRV) and
CN15 (CO81 MAIN and CO50 MAIN B)
I/O
N o .
1
2
i
I
-
Tabb A-21. CN2 (CO60 PSB Board)
I
Signal Name
No.
\ PEl (FRONT)
1 GND
Table A-19. CN12 (CO80 DRV) and
CN18 (CO81 MAIN and CO80 MAIN B)
I
Signal Name
I/O
I
1
2
3
4
5
6
7
8
I
+5v
+5v
GND
GND
GND
GND
+35v
+35v
Tablo A-22 CNl (CO80 PNL Board)
Table
No.
(
I
A-20. CNl (CO60 PSB Bawd)
I/O
Signal Name
I
No.
1
2
3
4
5
6
7
8
9
10
(
I/O
Signal Name
j
PAUSE
GND
TXS
LDLED
CKS
LDSW
RXS
+5v
GND
GND
I
1.
I ,
II
Q
’
m
u
’
D
w
IL
0
1
Figure A-3. CO60 DRV Board Circuit Diagram
A-11
REV.-A
‘-‘xl
A-12
Figure A-4. CO60 PSB Board Circuit Diagram
c
r
C
r
C
a
c
(1
IJ
.
P
c
c
u
I
t
m
I
1
-I
I
r
u
2,
I
_
5”$A>ti 0f
n
I
I
W
I
l.L
Figure A-5. C060 PSE Board Circuit Diagram
A-13
J
I
c!3
1
REV.-A
LO-SLOE002 OWO9 1Nd 0 9 0 3
5+
f-l
?
P
I
I
11
01
I
6
I
8
1
L
“9
I
9
I
B
I
I2
I
2
I
1
REV.-A
A-3. CIRCUIT BOARD COMPONENT LAYOUT
DJ
...
010
?O
THPQOc04 1
i
ET
/
8
,-, +
1
5
PSRRM256K/lH
- - - ----------r’
st
Y
Figure A-7. CO60 MAIN Board Component Layout
A-15
REV.-A
,0
fiPA 142ElAli
I
Cl I
Ice, it
1
1
0
IC9Ir
ULLi
IO
I
I
I
--,I
u
,1PAl429M
ICI3 ,
jI
r
“8’
-
PEW
F/&2:
PE(D
CO60 DRV
r)
:I
CN3
r)
R34
‘h
-+
R2e*-“f
I,‘,’
A S S Y . 2 0 0 3 0 7 2 01
Figure A-8. C060 DRV Board Component Layout
A-16
1
IZSV
SA
0
E
l-
I
-
C6
IN:
,Dl
I
A-17
+
0
D
-I
-
Figure A-9. CO60 PSB Board Component Layout
U &J
FI
s
XL
r
t
RI--
I
REV.-A
REV.-A
Fl
I
I
II
+
II
‘AL’
I’CU!?
rl::
A-18
Figure A-10. C060 PSE Board Component Layout
24ov T3.IsA
IP
LMS d10
IMS dla
A-20
Figure A-l 2-1. Exploded Diagram for LQ-870
A.4 EXPLODED DIAGRAM
REV.-A
REV.-A
A-22
Figure A-13-1. Exploded Diagram for Model-5DlO
610
c,
“525
3
590
El
REV.-A
Table A-23-l. Part No. Reference Table for LQ-870
Ref. No.
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
119
120
121
122
123
124
125
126
127
128
129
130
200
200
201
330
331
332
333
334
334
335
336
337
338
339
340
341
342
Table A-23-2. Part No. Reference Table for LQ-1170
Description
Ref. No.
HOUSING ASSY., LOWER
FOOT
HOUSING, FRONT
HOUSING, FRONT
COVER ASSY., PRINTER
EDGE GUIDE ASSY., REAR
EDGE GUIDE ASSY., REAR
COVER ASSY., FRONT
KNOB
SHIELD PLATE
COVER, DIP, SWITCH
SHIELD PLATE
GROUNDING PLATE
GROUNDING PLATE, I/F
GUIDE, I/F BOARD
XOVER, CONNECTOR, UPPER
CIRCUIT BOARD SPACER
GUKDE, I/F BOARD
SHEET, PANEL
LOGO PLATE
C.B.SCREW (m3 X 8)
C.B.(O) SCREW (M3 X 6)
C.B.S.(O) SCREW (M3 X 6)
C.B.B. SCREW (M3 X 12)
C.B.B. SCREW (M3 X 14)
PRINTER MECHANISM MOUNTING SCREW
C.B.B(O). SCREW (M3 X 8)
C.B.S.-TITESCREW (M3 X 12)
SNAP BAND
FERRITE CLAMP
BOARD ASSY., MAIN
BOARD ASSY., MAIN
C.P.B-TITE SCREW (M3 X 8)
BOARD ASSY., PSB
FUSE
FUSE COVER
INSULATION SPACER
INSULATION SPACER
INSULATION SPACER
INSULATION SPACER
TRANSISTOR
TRANSISTOR HOLDER
HEAT SINK
HOLDER, TRANSISTOR
CUP SCREW (M3 X 14)
C.B.S. SCREW (M3 X 6)
C.B.S-TITESCREW (M3 X 12)
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
119
120
121
122
123
124
125
126
127
200
201
330
331
332
333
334
335
336
337
338
339
340
341
342
A-24
Description
HOUSING ASSY., LOWER
FOOT
HOUSING ASSY., UPPER
HOUSING, FRONT
COVER ASSY., PRINTER
EDGE GUIDE ASSY., FRONT
EDGE GUIDE ASSY., REAR
COVER ASSY., FRONT
i KNOB
SHIELD PLATE
COVER, DIP, SWITCHTOR
SHIELD PLATE
GROUNDIGN PLATE
GRKOUNDING PLATE, I/F
BRACKET
COKVER, CONNECTOR, UPPER
CIRCUIT BOARD SPACER
GUIDE, I/F BOARD
SHEET, PANEL
LOGO PATE
C.B.SCREW (M3 k 8)
~C.B.(O) SCREW (M4x 8)
CB.(M3 Y 6 )
C.B.B. SCREW (M3 x 12)
C.B.B. SCREW (M4 x 14)
PRINTER MECHANISM MOUNTING SCREW
C.B.S.(O) SCREW (M3 *. 8)
BOARD ASSY., MAIN
C.P.B-TITE (M3 X 8)
BOARD ASSY., PSB
FUSE
FUSE
INSULATION SPACER
INSULATION SPACER
INSULATION SPACER
TRANSISTOR
TRANSISTOR HOLDER
HEAT SINK
HOLDER, TRANSISTOR
C.B.S. SCREW (M3 X 14)
C.B.S. SCREW (M3 X 6)
C.B.SPTlTESCREW (M3 X 12)
REV.-A
A.5 CASE OUTLINE DRAWING
-
-
Figure A-l 4-1. Case Outline Drawing for LQ-870
A-25
REV.-A
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11111
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I
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Figure A-l 4-2. Case Outline Drawing for LQ-1170
A-26
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~IIIIII II0 IIll III1 I I
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CO61 MAIN Board
A-37
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