Position the LEVER, G, ADJUST at position O. * Verify

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
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 heading.
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
ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND THE
HOST COMPUTER BEFORE PERFORMING ANY MAINTENANCE OR REPAIR
PROCEDURE.
2. NO WORK SHOULD
PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH
BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN
THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT
CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN
THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN
WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON
CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED
VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY-AC RATING DIFFERENT FROM THE AVAILABLE POWER
SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE
POWER SOURCE BEFORE
OR REPLACING PRINTED CIRCUIT BOARDS
AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE
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
OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND
VOID ANY APPLICABLE EPSON WARRANTY.
- ii -
REV.-B
PREFACE
This manual describes functions, theory of electrical and mechanical
operations, maintenance, and repair of the
070.
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.
●
The contents of this manual are subject to change without notice.
iv -
REVISION SHEET
DATE ISSUED
A
June 20, 1991
B
Sept. 6, 1991
CHANGE DOCUMENT
1st issue
Added information for the LQ-1 070:
l-i, l-ii, 1-1 - 1-8, 1-10, 1-11, 1-24, 1-26 - 1-28
2-i, 2-ii, 2-1 -
2-11,
2 - 1 3 - 2-15, 2-17, 2-18
3-i, 3-ii, 3-5 - 3-20
4-i, 4-1 - 4-4, 4-6
5-i, 5-1 - 5-5, 5-9, 5-11 - 5-19
6-i, 6-1, 6-4
A-1, A-ii, A-1 - A-1 5, A-17 -
9, A-22, A-23
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 -
REV.-B
CHAPTER 1
GENERAL DESCRIPTION
.....
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.2
....
S P E C I F I C A T I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
..
1 . 2 . 1 H a r d w a r e S p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
..
1 . 2 . 2 F i r m w a r e S p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
1.3
...
I N T E R F A C E O V E R V I E W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
1 . 3 . 1 P a r a l l e l I n t e r f a c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1. . -. 1 4
1.4
....
CONTROL PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
1.5
.
DIP SWITCHES AND JUMPER SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18
...
1 . 5 . 1 D I P S w i t c h S e t t i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
...
1 . 5 . 2 J u m p e r S e t t i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
1.6
OPERATING
..
I N S T R U C T I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
1.6.1
....
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
1.6.2
..
Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
1.6.3
Paper-out Detection and Forms Override Function . . . . . . . 1-21
1.6.4
...
Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21
1.6.5
...
Buzzer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21
1.6.6
Printer
1.6.7
...
Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
...
Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
.
Sheet Loading and Sheet Ejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
1.6.9
...
Tear-off Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23
..
1.6.10 LEVER, G, ADJUST . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
1.6.11 printer Protection for Heavy-Duty Printing . . . . . . . . . . . . . . . . . . . . . 1-25
1.7
...
M A I N C O M P O N E N T S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-26
1.7.1
MAIN Board (Main Control Circuit Board) . . . . . . . . . . . 1-26
1.7.2
PNL Board (Control Panel Circuit Board) ............. 1-27
1.7.3
Board (Power SupPlY Circuit Board) . . . 1-27
..............................1
. -28
1.7.4 Printer Mechanism (M-5
1.7.5
....
H o u s i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-28
-i
LIST OF FIGURES
Figure 1-1.
Exterior View of the
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-2.
Pin
Figure 1-3.
Printable Area for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-4.
Printable Area for Continuous Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Figure 1-5.
Character
Figure 1-6.
Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-7.
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-8.
...
Self-Test Printout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Figure 1-9.
.
Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
...
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
...
Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
...
Figure l-10. Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24
Figure 1-11.
070 Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
Figure 1-12.
MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-13.
PNL Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-14.
..
PSB/PSE Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-27
Figure 1-15.
O/5E60 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . .1-28
....
Figure 1-16. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-28
LIST OF TABLES
Table 1-1.
Interface Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-2.
...
Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Table 1-3.
.
Specifications for Cut Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Table l-4.
Specifications for Cut Sheets
.
(Carbonless Duplicating Paper) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Table 1-5.
Specifications for Continuous Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 -5
Table 1-6.
....
Envelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Table l-7.
...
Label Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Table 1-8.
..
Printing (Text Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Table 1-9.
Printing (Bit Image Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-10. Character Matrix and Character Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-11. Connector Pin Assignments and Signal Functions . . . . . . . 1-14
Table 1-12. Settings for DIP Switch 1
Table 1-13. Settings for DIP Switch 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
.
.............................
Table 1-14. International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-15. Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table l-16. Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......... 1-24
1.1 FEATURES
The
070 are small, light-weight, low-cost, printers with advanced paper handling that is
compatible with the LQ-5 10/550/1010. The printer’s main features are as follows:
● Use of
2 control codes
Ability to print multi-point fonts
Ability to receive and print raster graphic images
Compatibility with the
series available on the market
● Printing speeds: 225 characters per second
252
(draft, 12
210
(draft, 10
84
12
64
10
(high-speed draft, 10 characters per inch
● Optional interface card
● Clear, easy-to-read printing with standard EPSON fonts
● Multiple fonts resident in the printer
9 LQ fonts (Roman, Saris
Courier, Prestige, Script, OCR-B, Script C, Orator, Orator-S)
1 draft font
● Control panel switch selection of fonts, condensed, and cut-sheet feeder
● Optional tractor unit for push-pull tractor feed
bin
● Flexible handling of continuous paper
Three ways to insert continuous paper (front/bottom/rear path)
Auto backout and auto loading (rear insertion)
Use of continuous paper without removing
Attachment of standard tractor unit in either of two positions (push/pull)
● Easy handling of cut sheets with the optional cut-sheet feeder
Two ways to insert cut sheets (front/top)
Auto loading
The
070 are equipped with the standard EPSON 8-bit parallel interface. Various interface
options ensure compatibility with a wide variety of computers. Table 1-1 lists the interface options, Table
1-2 lists the optional units available for the
the
070.
070, and Figure 1-1 shows an exterior view of
.
Table 1-1. Interface Options
Model
Description
Serial interface card (inch screw)
Serial interface card (mini screw)
serial interface card (inch screw)
serial interface card (mini screw)
C82310
parallel interface card
C82313
IEEE-488 interface card
Printing is not possible for the following baud rates : 1800, 200, 134.5, 110, 75 bps.
NOTES: Refer to the “Optional Interface Technical Manual” for details.
The asterisks
in the table above represent the last digit of the part numbers. This digit varies,
depending on the country. For instance, in the U.S. the last digit is 1.
REV.-B
Table 1-2. Optional Units
Description
Model
Single-bin cut-sheet feeder (80-column)
High-capacity cut-sheet feeder (80-column)
cut sheet feeder (1 36-column)
High capacity cut sheet feeder (1 36-column)
Tractor unit (80-column)
C80019*
Tractor unit (1 36-column)
7753
Fabric ribbon cartridge (80-column)
7754
Fabric ribbon cartridge (1 36-column)
7768
7770
1
Film ribbon cartridge
Film ribbon cartridge (1 36-column)
Note: When a part number in the table above is followed by an asterisk (’), the last digit of the number
varies, depending on the country. For example, in the U. S., the model number for a single-bin
cut-sheet feeder (80-column) is
(LQ-107O)
Figure 1-1. Exterior View of the
1-2
REV.-B
1.2 SPECIFICATIONS
070 printer.
This section provides specifications for the
1.2.1 Hardware Specifications
Printing method
Serial, impact, dot matrix
Pin configuration
24 wires
X 2 staggered, diameter 0.2 mm)
2
Wires 1
I
-
- - - - - - ’ $
- -
1/90”
- 1 _-
- - - - - $
1/90”
‘-
I
1/60”
i
1
Figure 1-2. Pin Configuration
Feeding methods
Friction feed (front/top)
Push tractor feed (rear)
Pull tractor feed (front/bottom)
Push-pull tractor feed (with optional tractor) (rear)
Line spacing
Paper insertion
Paper-feed speed
1/6 inch, 1/8, or programmable in units of 1/360 i n c h
Friction feed
Front or rear side
Tractor feed
Front, bottom, or rear side
feed)
77.6
Friction without
2.2 inches per second
2.2
(continuous)
77.6
Tractor
2.2
(continuous)
(1/6-inch feed)
77.6
Friction with
(1/6-inch feed)
(continuous)
NOTE: The points below provide precautions for handling paper.
1. Friction feed (release lever in FRICTION POSITION).
Paper must be loaded from the front or top entrance.
Do not use continuous paper.
Do not perform any reverse paper feeds within the top 8.5 mm (.34
bottom 22 mm (.87 in.)
(top entrance), or bottom 40.2mm (1.6 in.) (front entrance) area.
Do not perform reverse feeds greater than 1/6 inch after a paper end has been detected.
1-3
● Use the paper tension unit.
● Do not use multi-part cut-sheet forms, except with front insertion.
● Do not perform reverse feeds greater than 1/6 inch when using envelopes.
2. Push tractor feed (release lever in REAR PUSH POSITION).
Paper must be loaded from the rear entrance.
Release the friction-feed mechanism.
Multi-part forms must be spot pasted beyond the perforation between the tractor holes.
Paper for multiple copies must be carbonless multi-part paper.
Use the paper tension unit.
Do not perform reverse feeds greater than 4/15 inch.
Since accuracy of paper feed cannot be assured after the paper end has been detected, please
do not perform reverse feeds after detection of a paper end.
3. Push-pull tractor feed (release lever in REAR PUSH POSITION).
Paper must be loaded from the front, rear, or bottom entrance.
Release the friction-feed mechanism.
Remove the paper tension unit and attach the pull tractor unit.
Ensure that there is no slack in the paper between the platen and the pull tractor.
Precisely adjust the horizontal position of the pull tractor and push tractor sprockets.
Paper for multiple copies must be spot pasted beyond the perforation between the tractor holes.
Paper for copies must be a carbonless multi-part paper.
Do not perform reverse feeds greater than 4/15 inch.
Do not perform reverse feeds after the paper end has been detected.
4. Pull tractor feed (release lever in PULL POSITION).
● Paper must be loaded from the front or rear entrance.
● Release the friction-feed mechanism.
● Remove the paper tension unit and attach the pull tractor unit.
● Insert the paper from either front or bottom.
● Paper for multiple copies must be spot pasted beyond the perforation between the tractor holes.
● Paper for copies must be a carbonless multi-part paper.
● Do not perform reverse feeds.
Paper specifications
See tables 1-3, 1-4, 1-5, 1-6, and 1-7
Table 1-3.
Width
Length
Thickness
Weight
Quality
for Cut Sheets (One-Part Paper)
mm (5.8 in. to 10.1 (* 16.5) in.)
148 mm to 257
(top insertion)
182 mm to 257 (*364) mm (7.2 in. to 10.1 (* 16.5) in.)
(front insertion)
364 mm (1 4.3 in.), maximum
0.065 mm to 0.14 mm (0.0025 in. to 0.0055 in.)
14 lb. to 24 lb. (52.3
to 90
Standard paper (photocopier paper, etc.)
Recycled paper (at normal temperatures)
(*136-column)
1-4
REV.-B
Table 1-4. Specifications for Cut Sheets (Carbonless Duplicating Paper)
Width
Length
Thickness
Weight
Quality
Copies
182 mm to 216 (’364) mm (7.2 in. to 8.5 (* 14.3) in.)
257 mm to 297 mm (10.1 in. to 11.7 in.)
0.065 mm to 0.14 mm (0.0025 in. to 0.0055 in.) - single sheet
0.12 mm to 0.32 mm (0.0047 in. to 0.012 in.) - total
17 lb. to 24 lb. (52.3
to 90
- single sheet
12 lb. to 15 lb. (40
to 58
- each
Carbonless duplicating paper
4 sheets (1 original and 3 copies)
(*136-column
Table 1-5. Specifications for Continuous Paper
Width
Thickness
Weight
Quality
Copies
101 mm to 254 (“406) mm (4.0 in. to 10.0 (* 16) in.)
0.065 mm to 0.10 mm (0.0025 in. to 0.0039 in.) - single sheet
0.065 mm to 0.32 mm (0.0025 in. to 0.012 in.) -total
14 lb. to 22 lb. (52.3
to 82
- single sheet
12 lb. to 15 lb. (40
to 58
- each
Standard paper or carbonless duplicating paper
Recycled paper (at normal temperatures)
4 sheets (1 original and 3 copies)
36-column)
Table 1-6. Envelopes
Size
Thickness
Weight
Quality
Copies
NOTES: ●
No. 6= 166 mm X 92 mm
No. 10= 240 mm X 104 mm
0.16 mm to 0.52 mm (0.0063 in. to 0.0197 in.)
Differences in thickness within the printing area must be less than
0.25 mm (0.0098 in.)
12 lb. to 24 lb. (40
to 91
Bond paper, standard paper, airmail
Not available
Printing on envelopes is available only at normal temperatures and only using top insertion.
● Keep the longer side of the envelope horizontal during insertion.
● Place the left edge of a No. 6 envelope
sheet guide setting mark.
Table 1-7. Label Specifications
Label size
Copies
Thickness
NOTES: ●
2 1/2 in. X 15/16 in.
4 in. X 15/16 in. “
4 in. X 1 7/16 in.
Not available
0.07 mm to 0.09 mm (0.0028 in. to 0.0031 in.) - base paper
0.16 mm to 0.19 mm
in. to 0.0075 in.) -total
Printing on labels is available only at normal temperatures.
● Labels must be of the fanfold type.
● Labels with pressure sensitive paper must be spot pasted beyond the perforation between
the tractor holes. The total thickness must be less than or equal to 0.3 mm (0.01 18 in.).
Labels can be printed out only if the temperature is between 5 and 35 degrees C (41 and
95 degrees F) and humidity is between 10 % and 80 % RH.
● Examples of labels AVERY CONTINUOUS FORM LABELS
AVERY MINI-LINE LABELS
● Labels must be used with the pull tractor (front or bottom).
● Do not perform reverse feeds.
1-5
Printable area
See figures 1-3, 1-4, and 1-5
top insertion 148 - 257 mm (5.8
148 - 257
420)
front insertion 182
182
257
364)
1“)
10. 1“
16.5))
257 mm (7.2
10 1“)
mm (7.2
1“
14.3’”))
.,, Printable area max. 203.2 mm (8 in.)
-1
mm
364mm
(14.3”)
max.
/,
I
(0.53”)
or more
v
(*
136-column)
(80-column):
3.0 mm (O. 12 in.) or more when paper width is less than 229 mm (9 in.).
24 mm (0.9
mm (1.0
insertion) or more when paper width is 229 mm
(9.0 in.) to 257 mm (10.1 in.).
(136-column:)
3.0 mm (O. 12 in.) or more when paper width is less than 392 mm (1 5.4 in.). 29 mm (1.14 in.) (top
insertion) /31 mm ( 1.22 in.) (front insertion) or more when paper width is 392 mm (1
in.) to 420
mm (1 6.4 in.).
Paper-feed accuracy cannot be assured within 22 mm (0.87 in.) from the bottom edge of paper (top
insertion).
Paper-feed
cannot be assured within 40.2 mm (1 .58 in.) from the bottom edge of paper
(front insertion).
Paper-feed accuracy cannot be assured within 22 mm (0.87 in.) from the top edge of paper.
Figure 1-3. Printable Area for Cut Sheets
101.254 mm
101.254 x406)
1*
1’
Printable
Printable area
Max. 203.2 mm
Max. 345.4
80 column
136
0
0
0
0
0
0
0
area
0
0
0
J
10“
-
9 mm (O 35”)
0
0
0
0
-:0
0
0
c
or more
0
t
0
Printable
area
0
0
0
0
0
0
0
Figure 1-4. Printable Area for Continuous Sheets
1-6
136-column)
REV.-B
(80-column):
●
1) 13 mm (0.51 in.) or more when a paper width of 101 mm (4 in.) to 241 mm (9.5 in.) is used.
24 mm (0.9
insertion)\ 26 mm (1.0 in.)(front/bottom insertion) or more when a paper width
of 254 mm (10 in.) is used.
(1 36-column):
13 mm (0.51 in.) or more when a paper width of 101 mm to 401.3 mm (4 in. to 15.8 in.) is used.
15 mm or more when a paper width of 381 mm to 406 mm (15 in. to 16 in.) is used. 13 mm (rear
insertion) (0.5 1 in.) /1 7 mm (front/bottom insertion) (0.67 in.) is used. ( 136-column).
Ink ribbon
Type #7753 black ribbon cartridge (80-column)
#7768 film ribbon cartridge (80-column)
#7754 black ribbon cartridge (1 36-column)
#7770 film ribbon cartridge (1 36-column)
Color Black
Life 2 million characters at 48 dots/character (black ribbon)
(80-column) 0.2 million characters at 48 dots/character (film ribbon)
(136-column) 0.3 million characters at 48 dots/character (film ribbon)
Dimensions of ribbon cartridge
Fabric Type:
(80-column):
293 mm (W) X 34 mm (H)
72 mm (D)
(136-column): 468.3 mm (W) X 34 mm (H) X 72 mm (D)
Film Type:
(80-column):
293 mm (W) X 34 mm (H) X 72 mm (D)
(136-column): 468.5 mm (W) X 34 mm (H) X 72 mm (D)
Reliability
Mean cycles between failures
3 million lines (excluding
Mean time between failures
Life of
4000 power on hours
(25% duty)
200 million strokes (black ribbon)
100 million strokes (film ribbon)
Safety approvals
Safety standards UL1 950 with D3 (U.S. version)
EN 60950
(European version)
Radio frequency interference
FCC class B (U.S. version)
VDE0871 (self-certification) (European version)
Electrical specifications
120 V version
Rated voltage
120
Input voltage range
103.5 to 132
Rated frequency
50 to 60 Hz
Input frequency
49.5 to 60.5 Hz
Rated current
2.0 A
Power consumption
Approx. 33 W (during a
test in draft mode, 10 cpi)
insulation resistance
10 megohms, minimum (at 500
VDC between AC line and
chassis).
Dielectric strength
1000
for 1 minute or
1200
for 1 second
(between AC line and chassis)
1-7
REV.-B
220 to 240 V version Rated voltage
220 to 240
Input voltage range
198 to 264
Rated frequency
50 to 60 Hz
Input frequency
49.5 to 60.5 Hz
Rated current
1.0 A
33 W (during a self-test
Power consumption
in draft mode, 10 cpi)
Insulation resistance
10 megohms, minimum (at 500
VDC between AC line and chassis).
Dielectric strength
1 minute or 1500
1250
1 second (between AC
line and chassis)
Environmental
Temperature range 5 to 35 degrees C (41 to 95 degrees F) - o p e r a t i n g
–30 to 60 degrees C (–22 to 140 degrees F)
conditions
– in shipment container
10 to 80 % RH - operating
Humidity
5 to 85 % RH – storage
Resistance to shock 1 G, within 1 ms – operating
2 G, within 1 ms - storage
Resistance to
0.25 G, 55 Hz, max. - operating
vibration
0.50 G, 55 Hz, max. - storage
Physical specifications (80-column):
Weight
6.1 kg,
(13.5
Dimensions 434 mm (width) X 368 mm (depth) X 151 mm (height)
17.4 in. (width) X 14.7 in. (depth) X 6 in. (height)
(136-column):
Weight
8.4 kg,
(1 8.6
Dimension 609 mm (width) X 368 mm
151 mm (height)
24.4 in. (width X 14.7 (depth) X 6 in. (height)
1-8
REV.-A
1.2.2 Firmware Specifications
level
Control code
2
(EPSON standard code for printers)
Printing direction
Bidirectional with logic seeking
Input data buffer
8KB (when SW 1-7 is OFF)
OKB (when SW 1-7 is ON)
Character code
8 bits
Character tables
Italic character table, PC 437, PC 850, PC 860, PC 863, PC 865
(PC indicates character table for personal computer)
Fonts and pitches
Bit-map fonts
EPSON Roman
Saris
10, 12, 15, proportional
10, 12, 15, proportional
EPSON Courier
10,
EPSON Prestige
10, 12
EPSON Script
10, 12
EPSON Script C
proportional
OCR-B
10
EPSON Orator
10
15
EPSON Orator-S 10
Scalable fonts
EPSON Draft
10, 12, 15
EPSON Roman
8 pt to 32 pt
EPSON Saris Serif 8 pt to 32 pt
Printing modes
Selection and mixture of the following modes are allowed, excluding 15 cpi
condensed mode:
O Print quality (draft/letter quality)
O Character pitch (10, 12, 15, or proportional)
O Condensed
O Double-width
O Double-height
O Emphasized
O Double-strike
O Italic
O Underlined
O
O Overscore
O Strike-through
O Outline
O Shadow
1-9
REV.-B
NOTES: High-speed draft is valid if the printer status is as follows:
● High-speed draft is selected by DIP switch.
● Emphasized character mode is not selected.
● Condensed character mode is not selected.
● Draft 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 into normal mode to print emphasized, condensed, or download
characters and bit images.)
Printing speed
See tables 1-8 and 1-9.
Printing columns
See Table 1-8.
Character matrix
See Table 1-10.
Character size
See Table 1-10.
Table 1-8. Printing (Text Mode)
Printable
Columns
Character Pitch
0
80 (* 136)
1
Print Pitch
10
12
15
Condensed
Printing Speed
Draft
LQ
10
210
70
137 (“233)
17.1
180
0
96 (* 164)
12
252
84
—
1
160 (*272)
20
210
140
—
0
120(”204)
315
225
—
—
Invalid
1
(* 136-column)
I
cpi:
characters per inch
Cps:
characters per second
LQ:
letter quality
high-speed draft
1-10
REV.-B
Table 1-9. Printing (Bit Image Mode)
Pins
Density
Bit Image Printing Mode
21.0
1632)
10.5
(“1632)
21.0
240
1920 (*3264)
10.5
80
640 (“ 1088)
10.5
Single-density
60
8
Dual-density
120
120
Double-speed, dual-density
8
Quadruple-density
8
CRT graphics
8
CRT graphics
I
Printing Speed
480 (*8 16)
8
8
Printable Dots
90
24
Single-density
60
24
Dual-density
120
24
CRT graphics II
24
24
960
960
720
(“1224)
480 (*8 16)
960
14.0
21.0
1632)
10.5
90
720 (“224)
14.0
Triple-density
180
1440 (“2448)
7.0
Hex-density
360
2880 (*4896)
7.0
I
(* 136-column)
dots per inch
ips:
inches per second
REV.-A
Table 1-10. Character Matrix and Character Size
Printing Mode
Face
Character Size
Matrix
Unit
sp
90
2.0 x 3.1
—
9 x 22
120
1.9 x 3.1
120
9 x 22
120
1.9 x 3.1
120
7 X 16
120
1.0 X 2.3
120
Draft, 10 pitch, condensed
—
240
—
120
Draft, 12 pitch, condensed
—
240
—
120
10 pitch
31 x 22
360
2.2 x 3.1
180
12 pitch
27 X 22
360
1.9 x
180
15 pitch
22 X 16
360
1.6 X 2.3
180
—
360
—
180
High-speed draft, 10 pitch
7
Draft, 10 pitch
Draft, 12 pitch
22
I
Draft, 15 pitch
10 pitch, condensed
12 pitch, condensed
360
proportional
proportional, super/subscript,
condensed
NOTES: .
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
Max. 28 X 16
Min. 12 X 16
360
360
1.8 X 2.3
0.7 X 2.3
180
proportional, condensed
proportional, super/subscript
–
I
—
—
I
360
360
I
—
—
I
180
is horizontal dot density in dots per inch.
● Face matrix and character size indicate the size of the maximum character. This value is
dependent on paper, ribbon, etc.
● Unit
sp (which also can be sent as unit, followed by the character string
indicates the minimum length to be added to the right of the character specified with the
sp control code.
● “ - ” indicates that the character matrix is reshaped by printer firmware. Character width
becomes half of the noncondensed character width.
1-12
REV.-A
(Typical
(Typical draft character)
2
3
4
5
6
7
8
9
10
11
12
13
Ascender area
2
3
4
R
I
G
H
T
L
E
F
T
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
s
P
A
c
E
s
P
c
E
15
16
17
18
19
20
21
22
23
24
Descender area
character)
Ascender area
R
I
G
H
T
L
E
F
T
s
P
A
c
E
s
P
A
c
E
I
Descender area
.
I
Face width
Face width
9 dots
29 dots
excluding 15 pitch)
15 dots for
15 pitch and condensed
(Typical
Character width (CW)
12 dots (10
15 dots (12
16 dots (15
120
180
240
14 dots (condensed 10
240
36 dots (10
30 dots (12
360
12 dots (condensed 12
240
24 dots (15
360
21 dots (condensed 10
360
18 dots (condensed 12
360
(Subscript character)
(Subscript character)
9
10
11
13
14
15
16
17
18
19
20
21
22
23
24
L
E
F
T
s
P
c
E
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
R
I
G
H
T
s
P
A
c
E
L
E
F
T
s
P
A
c
E
R
G
H
T
s
P
A
c
E
—
—
Figure 1-5. Character Matrix
1-13
REV.-A
1.3 INTERFACE OVERVIEW
The printer has a parallel interface with the specifications described below.
1.3.1 Parallel Interface
Specifications for the 8-bit parallel interface are as follows:
Data format
8-bit parallel
Synchronization
STROBE signal
Handshaking
BUSY and
signal
Signal level
Adaptable connector
57-30360
Data transmission timing
See Figure 1-6.
or equivalent
BUSY
DATA
STROBE
min.
min.
min.
Figure 1-6. Data Transmission Timing
Table 1-11 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-11. Connector Pin Assignments and Signal Functions
Pin No.
Signal Name
Return
Pin No.
Dir.
Functional Description
1
STROBE
19
IN
STROBE pulse to read the input data. Pulse width must
be more than
Input data is latched at 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 O.
28
OUT
This pulse indicates data has been received and the
printer is ready to accept more data. Pulse width is
approximately 11
10
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
ohm resistor.)
1-14
a 3.3K
Table 1-11. Connector Pin Assignments and Signal Functions (Cont.)
Pin No.
Signal Name
14
AUTO FEED-XT
Return
Pin No.
Dir.
Functional Description
—
IN
If LOW when the printer is initialized, the printer
automatically performs a line feed upon input of the
CR code (Auto LF).
15
Not used.
16
17
Chassis
—
—
Ground for twisted-pair grounding.
—
Chassis ground level of printer.
18
Not used.
to 30
Ground for twisted-pair grounding.
31
I NIT
32
ERROR
16
OUT
—
33
Pulse (width:
initialization.
IN
—
min., active LOW) input for printer
LOW indicates an error has occurred in the printer.
Ground for twisted-pair grounding.
Not used.
34
35
Always HIGH. (Pulled up to
resistor.)
OUT
—
36
DC
IN
through 3.3K ohm
control is disabled.
NOTES: 1. “Dir.” indicates the direction of the signal flow as viewed from the printer.
2. “Return Pin No.” denotes a twisted-pair return line.
3. The cable used must be shielded to prevent noise.
4. All interface conditions are based on TTL levels. Both the rise and fall times of all signals
must be less than
5. The
signal can be set to LOW by
switch 2-4.
6. The SELECT-IN signal can be set to LOW by jumper 3.
7. Printing tests, including those of the interface circuits, can be performed without using
external equipment by setting DATA 1- DATA 8 pins to the STROBE signal.
1-15
REV.-A
1.4 CONTROL PANEL
On the control panel are: a power button (labeled OPERATE), 7 non-lock type buttons, and 19 indicators.
Figure 1-7. Control Panel
BUTTONS
(1) OPERATE Button
This button turns on the power supply to the printer.
(2) PAUSE Button
This button controls printer action. Pressing the button toggles the printer between PAUSE condition
(no printing, no paper feeding, and not accepting data) and RUNNING. This button is also used in
conjunction with the
initialization, as if ESC
button as a buffer clear to clear the input buffer and perform software
had been received.
(3) LINE FEED/FORM FEED Button
Pressing this button performs a line feed, and holding down the button performs a form feed,
irrespective of the PAUSE/RUNNING condition. This button is also used in conjunction with the
button as the micro reverse feed.
(4) LOAD/EJECT Button
Pressing this button loads or ejects the paper. Refer to Section 1.6.8, Sheet Loading and Sheet Ejection.
This button is also used in conjunction with the
(5) TEAR-OFF/BIN
button as the micro forward feed.
2 Button
In tractor-feed mode, pressing this button advances continuous paper to the tear-off position, and the
TEAR-OFF indicator is lit. In friction-feed mode, pressing this button toggles between bin 1 and bin 2,
and the selected BIN indicator is lit.
Button
This button is used only in combination with another button,
1-16
(7) FONT Button
Pressing this button selects a font, and pressing it continuously selects the next one, sequentially. The
FONT LED indicates the currently selected font.
(8) CONDENSED Button
Pressing this button toggles the printing mode between normal and condensed, alternatively.
NOTE: Selections of the FONT and CONDENSED buttons are stored as defaults, so that the last FONT
and the CONDENSED selection become effective when the printer is initialized.
INDICATORS
(1) OPERATE (green)
Lit when the printer’s OPERATE button is on, and AC power is supplied.
(2) PAUSE (orange)
Lit when the printer is in PAUSE-mode (no printing, no paper feeding, and not accepting data).
(3) TEAR-OFF (orange)
Lit when the sheet is advanced to the tear-off position.
(4) DATA (orange)
Lit when the printer has received data from the host. .
(5) PAPER-OUT (red)
Lit when the paper-out detector senses no paper. Refer to Section 1.6.3, Paper-out Detection and Forms
Override Function.
(6) MULTI-PART (green)
Lit when the adjust lever is positioned at the 4th step or higher,
(7) BIN 1 (green)
Lit when bin 1 is selected.
(8) BIN 2 (green)
Lit when bin 2 is selected.
(9) FONT (green) - Draft, Courier, Roman, Saris Serif, Prestige, Script, Script C, Orator, Orator-S, OCR-B
These indicators show the currently selected font.
(10) CONDENSED (green)
Lit when condensed mode is selected.
1-17
1.5 DIP SWITCHES AND JUMPER SETTING
This section describes the DIP switch selections and jumper setting for the
printer.
DIP Switch Settings
The two DIP switch banks for the printer, located on control panel, function as shown in tables 1-12
through 1-15. (Note that the status of the DIP switches is read only at power on or upon receipt of the
INIT signal.)
Table 1-12. Settings for DIP Switch 1
No.
Description
2
3
International character set and PC selection
ON
selection
Factory
Setting
OFF
ON
ON
ON
See Table 1-14.
Graphic
Italic
OFF
5
Graphic print direction
Unidir.
Bidir.
OFF
6
High-speed draft
Invalid
Valid
OFF
7
Input buffer
Invalid
Valid
OFF
8
l-inch
ON
OFF
continuous
I
OFF
Table 1-13. Settings for DIP Switch 2
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 LF
ON
OFF
OFF
1-18
OFF
OFF
REV.-A
Table 1-14. International Character Set Selection
ON
ON
ON
ON
OFF
OFF
OFF
OFF
1-2
1-3
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Country
437
850
860
863
865
(437)
(437)
(437)
Us.
France
Germany
U.K.
Denmark 1
Sweden
Italy
Spain 1
L
When SW 1-4 is OFF,
If graphic table was selected by
t 1, PC becomes 437.
When SW 1-4 is ON,
if italic table was selected by
t O, country setting becomes U.S.
Table 1-15. Page Length
2-1
2-2
OFF
ON
OFF
ON
OFF
OFF
ON
ON
Page Length
11 inches
inches
8.5 inches
70/6 inches
1.5.2 Jumper Setting
If Jumper 3 is connected to GND, the
signal is fixed to LOW.
1-19
REV.-A
1.6 OPERATING INSTRUCTIONS
This section describes the self-test and hexadecimal dump functions and also includes the error states,
printer initialization, and buzzer operation.
1.6.1 Self-Test
To run the self-test using draft mode, turn the printer on while pressing the LOAD/EJECT button. To
run the self-test using the letter quality (LQ) mode, turn the printer on while pressing the LINE
FEED button. You can stop or start self-test printing by pressing the PAUSE button. When
you are satisfied with the self-test, stop the printing by pressing the PAUSE button and turn the printer
off.
The firmware revision number is printed on the first line of the self-test, followed by the current D I P
switch settings.
Xxxxxx
Country/PC
1-2
on on
o n o n
on
off
on
off
on
o n
France
German y
K.
I
o
i
1“3 1-4
off
off
Orl
off
off off
on
off
oft
o n
f
f
f
speed draft
Va 1 id
off
Invalid
on
Receive buffer
I
1 d
on
1 inch
1 rival
I
off
on on
I I
437
.
off
2-2
off
t
i
Figure 1-8. Self-Test Printout
1.6.2 Hexadecimal Dump Function
To put the printer in hex. dump mode, power it on while pressing both the LOAD\ EJECT and LINE
FEED buttons. In hex. dump mode, the printer prints out the hexadecimal representation
of the input data, along with the corresponding ASCII characters. This function is valuable for checking
the data the printer has received from the host. If input data is a nonprintable character code, a period
(.) is printed in the ASCII column.
74 01
20 69
20 6F 66 20 61
74
20 70
72 69
75
72
74
73 20 66 65
0.4 20 20
20 20 69 74
20
20
LB 52
54
00
69
73
36
20
20
6F
65
65
12
50
70
61 6E 20 65
64 61 74 61 20
75 74 2E 20 54
20
61
65
73 79
66
00
73
.@. R. . t. .6.
D.
This is a n e x a
mple of a data d
p r i n t o u t .
i s f ea
re makes
6F
.
61
6 4
Figure 1-9. Hexadecimal Dump Function
1-20
i
Paper-out Detection and Forms Override Function
When the paper-out detector, attached to the printer mechanism, detects a paper-end, the printer first
performs a forms override. If paper loading fails, the BUSY signal goes HIGH, the PAPER OUT indicator
is lit, the interface PE signal becomes HIGH, the ERROR signal becomes LOW, and the printer enters
the PAUSE condition automatically.
By ignoring the paper out, the printer can print additional lines after the paper out is detected. This
function is called the forms override function. After you load new paper and press the PAUSE button,
the printer recovers to the RUNNING condition, and printing restarts.
The printer enters the paper-out condition only when a paper-out is detected after the printer performs
paper loading.
1.6.4 Error Conditions
If any of the following error conditions are detected, the printer automatically enters PAUSE condition.
● Home position is not detected at printer mechanism initialization.
● Home position is detected during printing.
● The PAUSE button is pressed, and the printer enters PAUSE condition.
● A paper-out is detected after performing paper loading operation.
If parallel interface is selected, the following interface signals are output to indicate the error and to
stop data transmission:
The BUSY signal becomes HIGH.
The ERROR signal becomes LOW.
No ACKNLG pulse is sent.
1.6.5 Buzzer Operation
The buzzer sounds under the following conditions:
. A paper-out error is detected (beeps 3 times for 0.1 second, with 0.1 second intervals).
● Abnormal carriage movement is detected (beeps 5 times for 0.5 second, with 0.5 second intervals).
● A panel setting is accepted (O. 1 second beep).
Printer Initialization
There are three initialization methods: hardware initialization, software initialization, and panel
initialization.
(1) Hardware initialization
This type of initialization takes place when the printer power button is turned on (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:
1-21
REV.-A
(a) Initializes printer mechanism.
(b) Clears input data buffer.
(c) Clears downloaded character set.
(d) Clears print buffer.
(e) Returns printer settings to their default values.
(2) Software initialization
Input of the
command also initializes the printer. Printer initialization by
perform functions (a), (b), and (c) above. The settings changed by the last
code does not
operation are
maintained.
(3) Panel initialization
This printer can be initialized by pressing the PAUSE button in combination with the ALT button. When
the printer is initialized from the front panel, functions (a) and (c) above are not performed. The settings
changed by the last
operation are maintained.
1.6.7 Default Values
When the printer is initialized, the following default values are set:
Page position
The current paper position becomes the top-of-form position
Left and right margins
Released
Line spacing
1/6 inch
Vertical tabs
Cleared
Horizontal tabs
Every 8 characters (relative)
Family number of type style
Last font selected from the panel
Download
Kept - software initialization
characters
Cleared – hardware initialization
Character spacing
10 cpi
Printing effects
Cleared, except condensed printing
Condensed printing
Last setting selected from the panel
Printer condition
RUN
1.6.8 Sheet Loading and Sheet Ejection
The release lever can disengage the pull-tractor unit drive mechanism, giving this printer improved
paper-handling for functions that utilize the release lever. These functions are described below:
Automatic cut-sheet loading without the cut-sheet feeder
Move the release lever to the friction-feed position, and place the sheet along the paper guide (top or
front). A few seconds later, the sheet is automatically loaded to the top-of-form position and the printer
enters the RUNNING condition.
1-22
REV.-A
Automatic cut-sheet loading and ejection with cut-sheet feeder
Move the release lever to the friction-feed position, and place the sheets into the hopper of the cut-sheet
feeder. Pressing the LOAD/EJECT button loads one sheet to the top-of-form position. If a paper-out is
detected before printing starts, a sheet will again be loaded automatically to the top-of-form position.
Continuous paper loading and ejection
Move the release lever to the REAR PUSH position, and insert the paper into the tractor unit. Pressing
the LOAD/EJECT button loads the paper automatically to the top-of-form position. If a paper-out is
detected before printing starts, the paper will be loaded automatically to the top-of-form position.
If the LOAD/EJECT button is pressed after continuous paper has been loaded, the paper is ejected
backward to the push tractor unit. To back out several pages, press the LOAD/EJECT button several
times. Each time LOAD/EJECT is pressed, reverse feed is performed for a single 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 next loaded
At this time, the LOAD\ EJECT button advances the paper forward,
and the LINE FEED/FORM FEED button moves the paper backward.
The adjusted top-of-form position for continuous paper is saved in EEPROM, but the setting for cut sheet
paper is not saved.
1.6.9 Tear-off Function
The below tear-off function is limited under the push tractor mode.
Auto-tear-off
The auto-tear-off function is enabled by DIP switch setting. When this function is enabled and the release
lever is in the tractor position, the paper advances to the tear-off position automatically if the input data
buffer is empty and the printer is in the RUNNING condition. The TEAR-OFF LED lights to indicate that
you can use the LOAD/EJECT and LINE FEED/FORM FEED buttons, in combination 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 returns to the original position automatically and printing starts. If the PAUSE button is pressed
while the paper is advanced to the tear-off position, the paper returns to the original position (and the
printer enters the PAUSE condition).
1-23
REV.-B
Short-tear-off
To access 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 PAUSE or RUNNING
condition. At this time, the TEAR-OFF LED lights to indicate that you can use the LOAD/EJECT and LINE
FEED/FORM FEED buttons, in conjunction 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 returns to its original position
automatically and printing starts. If the TEAR-OFF button is pressed again while the paper is advanced
to the tear-off position, paper returns to its original position whether the printer is in PAUSE or RUNNING
condition.
I 1.6.10 LEVER, G, ADJUST Operation
The LEVER
ADJUST must be set to the proper position for the paper thickness. If this lever has been
set to the 4th step or higher, printing speed is reduced and the head energy is increased.
Table 1-16. Lever Positions
Paper Thickness
Lever Position
NOTE: If printing density becomes lighter, adjust the LEVER, G, ADJUST position one step higher.
1 position (3rd step)
A
Figure 1-10. Lever Positions
1-24
REV.-A
1.6.11 Printer Protection for
H e a v y -Dut y Pri nt i ng
This printer has a printhead protection function to prevent it from overheating and to protect the printer
when the head driver voltage drops. If head temperature exceeds its maximum value, printing stops
automatically until the head temperature drops to a certain value before printing resumes. Printing
resumes at a lower print speed at first.
However, as the head temperature decreases, print speed increases to normal speed automatically. If
the head temperature continues to increase at the lower speed, printing is stopped or resumed as
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 recovers 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
REV.-B
1.7 MAIN COMPONENTS
I
070 printers are designed for easy removal and replacement
The main components of the
to maintain and repair the printer. The main components are:
1)
MAIN board:
the main control board; the CPU on this board controls all main functions.
2)
PNL board:
the control panel board.
3)
the power supply board.
board:
the printer mechanism.
4) M-5
Board
MAIN Board
r
9
d
Printer
Printer Mechanism
Mechanism
10
070)
Figure 1-11.
1.7.1
The
Component Layout
MAIN Board (Main Control Circuit Board)
MAIN Board for the
consists of a TMP90C041 N 8-bit CPU, an E05A50 gate array,
a PROM (5 12K), a PSRAM (256 K), a mask ROM (character generator,
In addition to this, the board for the
MAIN Board (80-column and 136-column)
1-26
and a hybrid
070 also includes a SRAM (64 K).
(1 36-column)
(80-column)
Figure 1-12.
an
REV.-B
1.7.2
The
Board (Control Panel Circuit Board)
board is the
control panel, which includes the indicator
switches, I
and DIP switches.
Figure 1-13.
1.7.3
Board
Board (Power Supply Circuit Board)
The power supply unit consists of a switching regulator circuit, which converts the AC line voltage to
the DC voltages (for example,
type, and the
and + 5V) used by the printer. The
board is 220\240V input type.
o
o
Figure 1-14.
Board
.
1-27
board is 120V input
REV.-B
1.7.4 Printer Mechanism (M-5
The
printer mechanism was developed specifically for use with
070 printer.
The components include a carriage motor, carriage mechanism, paper-feed motor, paper-feed
mechanism, ribbon-feed mechanism, printhead, and sensors. This printer mechanism allows three ways
of paper insertion.
This picture shows
an 80-column Printer.
The
and
differ in
width only.
I
Printer Mechanism
Figure 1-15.
1.7.5 Housing
070 housing consists of the upper, lower, and front cases. The front case houses the
control panel board. The lower case contains the printer mechanism, the main control circuit board,
I The
and power supply circuit board.
070)
(LQ-570)
Figure 1-16. Housing
1-28
REV.-B
CHAPTER 2
OPERATION PRINCIPLES
2.1
OVERVIEW OF PRINTER MECHANISM OPERATION . . . . . . . . . . . . . . . 2-1
M e c h a n i s m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.1
Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
..
2.1.3 Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2.1.3.1 Paper Advance Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
2.1.3.2 Paper Insertion Entrances ......................................."."" 2-6
2.1.4 Ribbon Advance Mechanism ..................................."""..."..."."2.2
POWER SUPPLY
..
2 . 2 . 1 P o w e r S u p p l y O v e r v i e w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
2.2.2 SupPly Circuit Operation .....................
2.3
m
........
CONTROL CIRCUIT OPERATION
".
S.."
2.3.1
(Control
2.3.2
....
Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
2.3.3
...
Sensor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
2.3.4
MOTOR, CR Drive Circuit
2.3.5
..
MOTOR, PF Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18
Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Drive Circuit
2.3.6
2.3.7
Parallel Interface Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.8
EEPROM Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES
Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-1.
Figure 2-2.
Carriage
Figure 2-3.
Paper-Thickness Gap LEVER, G, ADJUST
2-2
M o v e m e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Figure 2-4.
..
Top Entrance Friction Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
LEVER, RELEASE Movement
Figure 2-9.
Paper Path for Top Entrance Friction Feed .................. 2-6
2-6
Figure 2-10. Paper Path for Rear Entrance Push Tractor Feed. . . . . . 2-7
Figure 2-11. Paper Path for Rear Entrance Push-Pull
...
Tractor Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
REV.-B
Figure 2-12. Paper Path for Bottom Entrance Pull Tractor Feed... 2-8
Figure 2-13. Paper Path for Front Entrance Friction Feed. . . . . . . . . . . . . . . 2-9
Figure 2-14. Paper Path for Front Entrance Pull Tractor Feed. . . . . . . 2-9
.
Figure 2-15. Ribbon Advance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1o
Figure 2-16. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Figure 2-17. Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13
Figure 2-18. Data Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. -15
Figure 2-19. Reset Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
.
Figure 2-20. RESET Signal Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
Figure 2-21. Sensor Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
.
Figure 2-22. MOTOR, CR Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Figure 2-23. MOTOR, PF Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Figure 2-24. Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-25. Head Drive Signal Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
Figure 2-26. Parallel Interface Circuit
2-20
.
Figure 2-27. EEPROM Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
LIST OF TABLES
Table 2-1.
Paper Advance Methods and Paper Paths ................... 2-3
Table 2-2.
Ribbon Advance Gear Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2-3.
Power Supply Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Table 2-4.
Power Supply Output Voltages and Applications ...... 2-11
Table 2-5.
Functions of the Main
Table 2-6.
MOTOR, CR Drive Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
.
and Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
REV.-B
2.1 OVERVIEW OF PRINTER MECHANISM OPERATION
This section describes the PRINTER MECHANISM of the
printer unit and explains
how the printer works. The
has a PRINTER MECHANISM that features a 24-pin impact
dot
for serial printing. There are four main parts to the printer mechanism: 1) the
mechanism, 2) the carriage movement mechanism, 3) the paper advance mechanism, and 4) the ribbon
advance mechanism. Each of these is described below.
2.1.1
Mechanism
The
mechanism consists of the
itself, the ink ribbon, and the PLATEN. The
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
and print dots independently of each other.
The basic way that the wires are driven is described in the four steps below.
drive circuit. This changes the
The control circuit outputs the drive signal to the
drive voltage, and current flows through the corresponding
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
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
together 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
Stopper
\
\
/
Actuating
Paper
Actuating plate
Figure 2-1. How the
Works
Figure 2-1 shows the action of the PRINTER MECHANISM when a single dot is printed. The
tends to heat up after a period of continuous printing. To minimize the possibility of the dot wire drive
coils overheating within the
and any loss of performance, the head is equipped with a
thermistor that detects the head temperature. When this thermistor detects changes in the
temperature, the voltage signal changes. This signal change is read by the control circuit for feedback
control.
2-1
I
REV.-B
2.1.2 Carriage Movement Mechanism
A timing belt is connected to the carriage on the lower side. With the
installed, this carriage
moves in either direction along the SHAFT, CR, GUIDE. The carriage is driven by the MOTOR, CR a
stepping motor that drives the TIMING BELT via the BELT PULLEY. The DETECTOR
HP DETECTS
when the carriage is in the home position.
Left
Carriage
SHAFT, CR, GUIDE
DETECTO I
MOTOR, CR
BELT PU”LLEY
Figure 2-2. Carriage Movement
The paper-thickness LEVER, G, ADJUST allows the printer to use different weights of paper (different
thicknesses). The user controls this lever and alters the platen gap on the SHAFT, CR, GUIDE by changing
its position. Changing the position of the lever rotates the CHAFT, CR, GUIDE and moves the carriage
either toward or away from the PLATEN. Moving the paper-thickness LEVER, G, ADJUST to the fourth
position or higher slows down the printing speed to protect the
The PG sensor reads the
current position of the paper-thickness LEVER, G, ADJUST.
ADJUST
PLATEN
PLATEN
Figure 2-3. Paper-Thickness LEVER, G, ADJUST Movement
2-2
2.1.3 Paper Feed Mechanism
Cut sheet paper is advanced by friction feed. Continuous form paper is advanced using a tractor feed
mechanism.
There are three ways to advance the paper with tractor feed: using the push tractor, using the pull tractor,
using the push and pull tractors together. Any one of these three tractor configurations can feed
paper through the printer. In normal operation, the printer is set up with one tractor, which functions
as either a push tractor or pull tractor, depending on where it is attached to the printer body. To use
the push-pull tractor feed method, an optional tractor must be attached in addition.
There are also four ways to insert paper into the printer. Different paper paths are used for different
types of paper. Table 2-1 lists which paper paths can be used for each of the various paper advance
methods.
Table 2-1, Paper Advance Methods and Paper Paths
Paper Insertion (Paper Paths)
Paper Advance Method
Rear
Entrance
Front
Entrance
Bottom
Entrance
Top
Entrance
Friction Feed
No
OK
No
OK
Push Tractor
OK
No
No
Pull Tractor
No
OK
OK
No
Push-pull Tractor Feed
OK
No
No
No
2.1.3.1 Paper Advance Mechanisms
This section describes how the friction feed and tractor feed mechanisms work to advance the paper
in the printer.
Friction Feed Method
The paper is held between the platen and paper advance’ roller, and between the paper eject roller and
paper eject unit cover. The paper-feed pinion gear, turning in the direction of the black arrow, drives
the COMBINATION GEAR, 8.5, 30. The COMBINATION GEAR, 8.5, 30 turns the SPUR GEAR, 34,
paper-feed rollers, and top ROLLER
PAPER EJECT. The paper then advances in the direction of
the white arrow.
The paper advance roller spring holds the paper against the platen. Setting the LEVER, G, ADJUST to
the tractor feed position releases this pressure and frees the paper. Figure 2-4 illustrates friction feed
when paper is inserted through the top entrance.
R
6
40
raper teea
Roller
COMBINATION GEAR, 8.5, 30
Paper Feed Motor Pinion Gear
MOTOR, PF
Figure 2-4. Top Path Friction Feed
2-3
REV.-B
Push Tractor Method
I
When the push tractor is selected, the SPUR GEAR, 16 engages the SPUR GEAR, 17 (Tractor gear) on
the TRACTOR
COMBINATION GEAR, 8.5, 30 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.
I
During tractor feeding, the LEVER, G, ADJUST 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)
ROLLER
PAPER EJECT
PLATEN
COMBINATION GEAR,
30
Paper Feed Motor Pinion Gear
MOTOR, PF
Figure 2-5. Push Tractor Operation
2-4
Pull Tractor Method
Using pull tractor feed to advance the paper is basically the same as using push tractor feed. In push
tractor feed, the TRACTOR
(paper advance mechanism) is before the paper entrance. It pushes
the paper through the PRINTER
tractor
has the opPosite
with the tractor situated after the paper entrance. Since it pulls the paper through the PRINTER
MECHANISM, it requires no paper tension unit. Figure 2-6 illustrates pull tractor operation tractor when
paper is inserted through the bottom path.
Paper (Continuous)
/
TRACTOR
PLATEN
\
/
SPUR GEAR, 16
Gear
GEAR, 8.5, 30
Figure 2-6. Pull Tractor Operation
Push-Pull Tractor Method
This is a combination of the push tractor and pull tractor methods. TWO tractors are used, one in f
of and one behind the paper entrance, to advance the paper. They act simultaneously to push and
the paper through the PRINTER MECHANISM. Figure 2-7 illustrates push-pull tractor operation.
Paper (Continuous)
PL
7
R, 40
Feed Motor
Gear
T
Figure 2-7. Push-Pull Tractor Operation
2-5
‘rent
pull
REV.-B
The LEVER, RELEASE switches between friction feed and tractor feed. Setting the LEVER, RELEASE to
the friction feed position presses the paper advance roller against the PLATEN. Setting the release lever
to the tractor feed position releases this pressure, so that the paper advance roller separates from the
PLATEN. The DETECTOR
RELEASE senses the current position of the LEVER, RELEASE.
E
R GUIDE
., RELEASE
Paper Feed Roller
Figure 2-8. LEVER, RELEASE Movement
2.1.3.2 Paper Insertion Entrances
This section describes the different ways to feed paper into the printer.
Top entrance paper insertion
When you feed paper into the printer through the top entrance, the method to advance the paper is
friction feed.
I
There are two paper-out detectors: the front paper-out detector is in front of the PRINTER MECHANISM
and the rear paper-out detector is behind the PRINTER MECHANISM. When paper is inserted through
the top entrance, the rear detector senses when the paper runs out.
ROLLER
Paper (Cut Sheet)
PAPER EJECT
Printhead
\
Paper Feed Roller
Figure 2-9. Paper Path for Top Entrance Friction Feed
2-6
REV.-B
Rear entrance paper insertion
When you feed paper into the printer through the rear entrance, the method to advance the paper can
be: the push tractor, or the push-pull tractor. The rear paper-out detector senses when the paper has
run out.
Paper (Continuous)
ROLLER
\
PAPER EJECT
PAPER GUIDE
TRACTOR
DETECTOR
Paper Feed Roller
Figure 2-10. Paper Path for Rear Entrance Push Tractor Feed
Paper (Continuous)
TRACTOR
TRACTOR
DETECTOR
Paper
PE, REAR
Roller
Figure 2-11. Paper Path for Rear Entrance Push-Pull Tractor F e e d
2-7
REV.-B
Bottom entrance paper insertion
When you feed paper into the printer through the bottom entrance, the pull tractor advances the paper.
The front paper-out detector senses when the paper runs out.
Paper (Continuous)
PF Drive Roller
/ From Bottom Insertion
Figure 2-12. Paper Path for Bottom Entrance Pull Tractor Feed
2-8
REV.-B
Front entrance paper insertion
When you feed paper into the printer through the front entrance, the paper can be advanced either
with friction feed or the pull tractor. The front paper-out detector senses when the paper runs out.
Paper (Cut sheet)
\
ROLLER
PAPER EJECT
PF Drive Roller
FRONT
DETECTOR
Paper Feed Roller
From Front Insertion
Figure 2-13. Paper Path for Front Entrance Friction Feed
Paper (Continuous)
TRACTOR
DETECTOR
FRONT
From Front Insertion
Figure 2-14. Paper Path for Front Entrance Pull Tractor Feed
2-9
REV.-B
2.1.4 Ribbon Advance Mechanism
The ribbon drive gear advances the ribbon through a gear linkage. This arrangement of gears makes
the ribbon drive gear always rotate in a counterclockwise direction, regardless of the direction the
carriage is moving.
Table 2-2. Ribbon Advance Gear Linkage
I
Direction of Carriage
Movement
Left to right (arrow
)
Gear Linkage
I
PULLEY, DRIVEN
Ribbon transmission gear
● COMBINATION
COMBINATION GEAR (4) ● RATCHET, RD
COMBINATION GEAR (1)
Right to left (arrow
)
●
GEAR (3)
PULLEY, DRIVEN Ribbon transmission gear
COMBINATION GEAR
COMBINATION GEAR (2)
RATCHET, RD
The ink ribbon within the cartridge case is an endless ribbon that is held against the ribbon advance
roller by the pressure of the ribbon grip roller. The ribbon advance roller, linked to the ribbon drive gear,
winds the ink ribbon.
The ribbon brake spring, attached to the exit slot of the cartridge case, prevents slack in the ribbon
and keeps the ribbon tension correct, The ribbon mask keeps the paper clean by preventing the ribbon
from brushing against the paper.
Ribbon Feed Roller
Ribbon Pressure Roller
Ribbon Transmission Gear
Brake
COMBINATION GEAR
RATCHET, RD .
arriage
COMBINATION GEAR
Figure 2-15. Ribbon Advance Mechanism
2-10
2.2 POWER SUPPLY OPERATION
The printer can be powered by either of two power supply boards: the 120 V
220/240 V
board or the
board. The only difference in the way these two boards operate is in the primary
circuitry. How they work to supply power to the printer is identical. These power boards output the DC
current necessary to drive the printer control circuits and printer drive mechanism. Table 2-3 shows
the input voltages and fuse ratings for these boards.
Table 2-3. Power Supply Boards
Board
Fuse F1 Rating
input Voltage
103.5 to 132
2.5A / 125 V
198 to 264
1.25A / 250 V
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
MOTOR, CR drive
MOTOR, PF drive
Printhead drive
+5 v
MAIN board logic circuitry
Various sensors
Control panel LEDs
MOTOR, PF hold
2.2.2 Supply Circuit Operation
Figure 2-16 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
supply. A +35 V line voltage detector circuit is connected to the switching circuit. This feedback control
arrangement ensures that the +35
The + 5
supply is kept stabilized.
supply is achieved by feeding the
This circuit further steps down the +35
line through the
power supply circuit.
voltage and outputs a stabilized +5
supply.
There are two main features of the power supply circuit. First, the power supply switch is in the
secondary circuitry. When this switch is turned off, the switching circuit is de-energized and output of
the +35
supply stops. However, since the switch is in the secondary circuitry, while the printer
remains plugged into the external AC supply current continues to flow in the primary circuitry, whether
the power supply switch is turned off or on. For this reason, before you perform any maintenance work,
you must disconnect the printer from the external AC power supply by unplugging it from the power
source.
2-11
Second, there are four circuits to protect the supply circuitry and avoid danger. The +5
line
contains a current overload protection circuit and a voltage overload protection circuit. The current
overload protection circuit is part of the + 5
supply circuit. It cuts the + 5
line if the current
is too great. The + 5 V voltage overload protection circuit cuts the supply if the voltage reaches or
exceeds + 7
The +35
It stops the switching circuit operation, which stops the output of the +35
line.
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 +36
It stops the switching circuit operation, which stops the output of the +35
line. The voltage drop
protection circuit protects the printer from such damage as might occur from short circuiting in the
secondary circuitry of the +35
line. If a voltage drop is detected, it stops the switching circuit
line.
operation, which stops the output of the +35
Power Supply Board
---------------------------- -------------------- -------------------- -,
I
b
1
Secondary
Prima ry
1
I
1
supply
Circuit
1
,
1
1
1
1
1
1
1
1
1
1
+
1
1
1
1
1
1
1
1
1
1
1
+5
1
1
I
1
1
1
1
1
1
t
1
Filter
Circuit
1
1
1
I
1
1
1
I
I
1
1
1
1
1
1
I
I
1
I
1
1
I
I
1
I
1
1
1
1
1
1
1
1
1
1
1
1
1
I
1
1
1
1
1
1
I
I
1
+35 line
Voltage
Drop
Protection
Circuit
1
1
1
1
- - - - - - -
I
- - - - - - - - - - - - - - - - - - - - - - - - -
AC Input
Figure 2-16. Power Supply Circuit Block Diagram
2-12
1
Power
Switch
REV.-B
2.3 CONTROL CIRCUIT OPERATION
The control circuit consists of two boards: the
the
MAIN board, which acts as the main board, and
board, which acts as the control panel board. This section describes how these boards
work.
Control Circuit Operation Overview
2.3.1
The printer CPU is an 8-bit CPU TMP90C041 running at 10 MHz. It oversees control of all the
components of the printer. The
gate array contains various memory management functions
that control the assignment of the memory and
areas. Rationalization and simplification of the
circuitry is achieved through use of the
which holds all the driver circuits for driving the
PRINTER MECHANISM on a single chip. Figure 2-17 shows the control circuits in block diagram form. I
-------
Board
Control
Panel
--
1
1
MAIN Board
~ ---------- ----------------------------- ------------------------1
1
1
1
Parallel
l/F
GA
EEPROM
“
(4D)
1
I
I
I
t
I
I
1
,
1
136
column
only
1
1
Option
l/F
I
PROM
5 12K
(5 E)
256K
(6E)
I
1
1
1
1
1
1
❑
Vref
Circuit
1
1
1
1
t
1
1
1
1
1
1
1
1
1
1
7
I
1
64K
( 1 E)
,
!
t
1
8M
1
1
1
1
1
1
1
1
1
1
1
1
(2A)
CPU
1
1
1
I
I
1
1
1
1
-
.
----------------------
-
I
I
PRINTHEAD MOTOR, CR MOTOR,
I
1
------------------
DETECTOR AS
HP
----------------------------
PE, FRONT
DETECTOR
PE, REAR
-------------------------
1
I
I
DETECTOR
PLATEN
DETECTOR
RELEASE
----------------------
j
I
----
PRINTER MECHANISM
GA
DETECTOR
Gate array
HP Home position sensor
DETECTOR
RELEASE Platen gap sensor
MOTOR, CR
Carriage motor
DETECTOR
RELEASE Release sensor
MOTOR, PF
Paper advance motor
DETECTOR
DETECTOR
PE, FRONT Front paper-out detector (positioned in front of the PRINTER MECHANISM)
PE, REAR Rear paper-out detector (positioned behind the PRINTER MECHANISM)
Figure 2-17. Control Circuit Block Diagram
2-13
REV.-B
Table 2-5 lists the functions of the main components and circuits of the printer. The CPU converts the
print data sent from the host computer to image data (the print image). The image data is then loaded
to RAM. Each line of data is processed sequentially. The CPU transfers the print data to the
drive circuit. The CPU sends the
drive pulse to the
drive circuit. The length of this
drive voltage. The head drive circuit then outputs the head drive
pulse corresponds to the
signal.
Host
Computer
RAM
CPU
Print
Data
---------
Print Data
Convertor
t
*
Line
II
Drive
Pulse
STK-6022B
Data Latch
and
Data Output
Figure 2-18. Data Flow
Table 2-5. Functions of the Main
or Circuit
Functions
Location
Receives data from the host computer and loads the data to the input
buffer in
(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
drive
circuit. Also controls various parts of the PRINTER MECHANISM, such as
the motors.
TMP90C041
I
E05A50
and Circuits
4D
This is a gate array consisting of three components configured on a
single chip:
Memory Management Unit
Handles CPU memory in ROM, RAM, and mask ROM, and assigns
addresses for other devices.
Parallel Interface (Parallel I/F)
Holds the parallel interface functions.
Reset Circuit
Contains the circuit that generates the RESET signal.
2-14
REV.-B
Table 2-5. Functions of the Main
or Circuit
and Circuits (Cont.)
Functions
Location
2A
This is a single chip that houses drive circuits for the printhead,
and MOTOR, PF of the PRINTER MECHANISM. The chip also includes the
various sensor input circuits for the PRINTER MECHANISM.
PROM
5E
PROM contains the program that runs the CPU.
RAM
6E
Holds the CPU working area and the various buffers. (1 E is not used for
an 80-column device and is not installed.)
MROM
(Mask ROM)
3E
4E
Holds the character design (also called the character generator).
is an electronically writable and erasable ROM used to hold such
information as the TOF position.
Vref Circuit
This is a circuit for generating the reference voltage used in the A/D
convertor within the CPU.
—
2.3.2 Reset Circuit
Figure 2-19 shows the reset circuit in block diagram form. The reset circuit issues the RESET signal.
Each part of the control circuits is initialized when this
is received. The conditions when
the RESET signal is output are described below.
When turning on the power supply
Immediately after the power has been turned on,
(2A) outputs the
pulse.
receives this pulse and then outputs the DISC pulse. The electrical charge in the condenser within
the
is then discharged. After this, STK-6022”B outputs the
signal, and
then
outputs the RESET signal. After a certain time has elapsed, the charge in the condenser in the
builds up again. The
signal is canceled and then the RESET signal is canceled.
Resets performed by the CPU itself (CPU self-reset)
The CPU outputs the RESET signal if there is a RESET request for
the DISC pulse.
+5
Line
(2A)
-----------
-----------
—
DISC
75
107
73
106
’0
—
5
Figure 2-19. Reset Circuit Block Diagram
2-15
and if
has output
REV.-A
Power On
CPU Self Reset
+5 V Line
Figure 2-20. RESET Signal Timing
2.3.3 Sensor Circuits
Figure 2-21 shows the sensor circuits in block diagram form. Detection of any excessive printhead
temperature causes the TEMP2 signal to be sent directly to the CPU. Other signals, such as the
signal, pass through the
unit before reaching the CPU. Terminals
to
are used for the A/D convertor.
The
circuit generates the A\D convertor reference voltage
CPU (1 c)
(2A)
PE20UT
PE1OUT
‘
PE 1
P34
GAPOUT
GAP
P31
LEVOUT
LEVER
P51 —
“
A V P P
VPP
I
‘
4.741 v
Circuit
Figure 2-21, Sensor Circuit Block Diagram
2-16
GAP
LEVER
+35 V Line
on the CPU
REV.-B
2.3.4 MOTOR, CR Drive Circuit
Figure 2-22 shows the MOTOR, CR drive circuit. An open-loop, constant-current drive arrangement is
used for running the MOTOR, CR. The motor is driven by 2-2 phase excitation and 1-2 phase excitation.
2-2 phase excitation corresponds to two 1-2 phase excitation steps. Thus, for each single step phase
change of a 2-2 phase excitation motor, the carriage moves 1/1 20 inch. For each single step phase
change of a 1-2 phase excitation motor, the carriage moves 1/240 inch.
The MOTOR, CR drive circuit of the
detects the amount of current flowing in the MOTOR,
CR coil and regulates this current. The current flowing through the coil varies, depending on the speed
of the MOTOR, CR. The amount of current is set by the CPU via the
to
1 to
on the
The
port. Signals are sent
sets the coil current to correspond to the
I
MOTOR, CR speed.
Ports
on the CPU are used exclusively as control ports for the stepping motor.
to
(2A)
CPU (lC)
Coil Current
MOTOR, CR
P61
-
CRC
m
Po
Data
Bus
Gp
P2
P5
Coil Current
1
GND
E05A50(4D)
Figure 2-22. MOTOR, CR Drive Circuit
Table 2.6. MOTOR, CR Drive Modes
I
Drive Mode
3.214 X speed
3 X speed
2 X speed
1.5 X speed
4/3 X speed
1 X speed
2/3 X speed
1/2 X
Excitation
2-2
2-2
2-2
1-2
1-2
1-2
1-2
1-2
phase
phase
phase
phase
phase
phase
phase
phase
Drive Frequency Type
Standard Print Character
High Speed Draft
Draft
2700
2520
1680
2520
2240
LQ
1680
1120
840
2-17
REV.-B
I
2.3.5 MOTOR, PF Drive Circuit
The printer uses a stepping motor to advance the paper. The minimum amount of paper that can be
advanced is 1/360 inch. The motor is a 2-2 phase or 1-2 phase, constant-voltage drive type.
I
to
on the CPU are the control ports for the stepping motor. MOTOR, PF phase data is output through
to
these ports.
are turned on and off within the
according to this phase data sent
from the CPU.
When the MOTOR, PF is running, the voltage supplying the coil of the MOTOR, PF is +35 V. When the
MOTOR, PF 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
terminal of the
when PFENB is turned on
or off.
(2A)
CPU
MOTOR, PF
P71
E05A50
Figure 2-23. MOTOR, PF Drive Circuit
2-18
REV.-A
2.3.6
Drive Circuit
Figure 2-24 shows the
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 within the
The CPU samples the voltage of the +35 V line via the A/D
convertor (see Section 2.3.3).
The CPU outputs a pulse via the CPU time output port
The length of this pulse corresponds to
the voltage of the +35 V line. This pulse becomes the head drive signal. In this way,
head drive signals (signals HD 1 to
outputs
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
subdividing the data three times before sending.
By sampling the +35 V line voltage and determining the length of the head drive signal, it is possible
to maintain the energy supplied to the head at a constant level. If the voltage of the +35 V line is HIGH,
the CPU shortens the output pulse. If the voltage of the +35 V line is LOW, the CPU lengthens the output
pulse.
Figure 2-25 shows the timing of-the output of the head drive signal.
CPU (Ic)
DO-7
DO-7
HD 1-24
.
E05A50
Figure 2-24.
Drive Circuit
CPU
Output
r---------- 1
1
L
----------
1
L
t
J
------
.----J
Figure 2-25. Head Drive Signal Output Timing
2-19
REV.-A
2.3.6
Drive Circuit
Figure 2-24 shows the
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 within the
The CPU samples the voltage of the +35 V line via the A/D
convertor (see Section 2.3.3).
The CPU outputs a pulse via the CPU time output port
The length of this pulse corresponds to
the voltage of the +35 V line. This pulse becomes the head drive signal. In this way,
outputs
head drive signals (signals HD 1 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
subdividing the data three times before sending.
By sampling the +35 V line voltage and determining the length of the head drive signal, it is possible
to maintain the energy supplied to the head at a constant level. If the voltage of the +35 V line is HIGH,
the CPU shortens the output pulse. If the voltage of the +35 V line is LOW, the CPU lengthens the output
pulse.
Figure 2-25 shows the timing of the output of the head drive signal.
CPU
(2A)
DO-7
DO-7
HOI-24
(4D)
Figure 2-24.
CPU
Output
I
, ----------
Drive Circuit
I
I
1
r
1
1
L
L
- - - - - - - - - - J
-
-
-
Figure 2-25. Head Drive Signal Output Timing
2-19
-
-
1
- - - - - - - - - - - A
-
-
-
-
-
-
z
REV.-B
CHAPTER 3
DISASSEMBLY AND ASSEMBLY
....
3.1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.1.1 Precautions for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.2
..............................................................................................
3-1
.
3.1.3 Service Checks After Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.1.4 Specifications for Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
..
3.2.1 Changing the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
..
3.2.2 Removing the Printer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.2.2.1 Removing the Front Case. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.2.2.2 Removing the HOUSING
UPPER ............ 3-6
.
3.2.3 Removing the Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
MAIN
3.2.3.1 ‘Removing the BOARD
..
MAIN Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
POWER SUPPLY
3.2.3.2 Removing the BOARD
.
PSB/PSE Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
3.2.3.3 Removing the BOARD ASSY.,PANEL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
..
PN L B oard)
3.2.4 Removing the PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
3.2.5 Disassembling the PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . 3-10
3.2.5.1
.
Removing the Motor, CR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
3.2.5.2
Removing the Motor, PF . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 3-11
3.2.5.3
Removing the CABLE, HEAD, FRONT(,REAR)... 3-11
3.2.5.4
.
Removing the Carriage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
3.2.5.5
.
Removing the PLATEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
3.2.5.6
Removing
Disassembling
.
the FLAME, MAIN, RIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3.2.5.7
Removing and Disassembling the PAPER GUIDE
Assembly (Including the DETECTOR
RE-
...
LEASE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
3.2.5.8
Removing
3.2.5.9
Removing the DETECTOR
REAR .... 3-17
3.2.5.10 Removing the DETECTOR
FRONT.. 3-18
Removing the DETECTOR
PLATEN ....... 3-18
3.2.5.11
DETECTOR
HP... . . . . . . . . . . . . . . . 3-17
3.2.5.12 Disassembling the TRACTOR ASHY. . . . . . . . . . . . . . . . . . 3-19
..
3.2.5.13 Arranging the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
REV.-B
LIST OF FIGURES
Figure 3-1.
Flowchart for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . 3-4
Figure 3-2.
Removing the Printer Cover and
..
the Paper Eject Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Figure 3-3.
..
Removing the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Figure 3-4.
. -6
Removing the HOUSING, FRONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 3-5.
Removing the Cover for the Optional
Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Figure
Removing the SHIELD PLATE, MAIN BOARD ............ 3-7
Figure 3-7.
Removing the BOARD
Figure 3-8.
Removing the BOARD
POWER SUPPLY . . . . . . . . 3-8
Figure 3-9.
Removing the BOARD
PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
MAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Figure 3-10. Removing the PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
.
Figure 3-11. Removing the MOTOR, CR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Figure 3-12. Removing the MOTOR, PA............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Figure 3-13. Removing the CABLE, HEAD,
. . . . . . . . . . 3-11
Figure 3-14. Removing the Carriage Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Figure 3-15. Removing the PLATEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . 3-13
Figure 3-16. LEVER, RELEASE Insertion Positioning . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Figure 3-17. Disassembling the FRAME, MAIN, RIGHT . . . . . . . . . . . . . . . . . . . . 3-14
Figure 3-18. Direction for Inserting the PLAIN WASHER . . . . . . . . . . . . . . . . 3-15
.
Figure 3-19. Removing the PAPER GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
Figure 3-20. Removing the PAPER GUIDE
Figure 3-21. Removing the LEVER
SUPPORT . . . . . . . . 3-16
PF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Figure 3-22. How to Insert the SHAFT, RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -16
Figure 3-23. Removing the
HP . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Figure 3-24. Removing the
REAR. . . . . . . . . . . . . . . 3-18
Figure 3-25. Removing the
FRONT . . . . . . . . . . . . 3-18
Figure 3-26. Removing the
Figure 3-27. Disassembling the TRACTOR
PLATEN . . . . . . . . . . . . . . . . . . 3-19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
....
Figure 3-28. Arranging the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
LIST OF TABLES
.
Table 3-1. List of Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Table 3-2. Equipment Required for Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Table 3-3. Inspection Checklist for Repaired Printer . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
.
Table 3.4. Abbreviations Used for Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Table 3-5. Types of Screws and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
REV.-A
3.1 OVERVIEW
This section describes the various points to note when disassembling and assembling the printer.
3.1.1 Precautions for Disassembling the Printer
Follow the precautions below when disassembling the printer.
WARNING
Before disassembling, assembling, or adjusting the printer, disconnect the power supply cable from
the external AC power socket. Failure to do so risks personal injury. The power supply switch for
the printer is wired into the secondary circuitry. As a result, the printer still remains live with current
flowing even when this switch is off.
CAUTION
To maintain efficient printer operation, use only the recommended tools for maintenance work.
Use only the recommended lubricants and adhesives (see Chapter 6).
Adjust the printer only in the manner described in this manual.
3.1.2
Tables 3-1 and 3-2 list the various recommended tools that are needed when disassembling,
assembling, or adjusting the printer. Use only tools that meet these specifications.
Table 3-1. List of Recommended Tools
Part No.
Tool
Round-nose pliers
Nippers
B740400 100
B7405OO1OO
Tweezers
Soldering iron
E-ring holder # 2.5
E-ring holder # 5
E-ring holder # 6
Phillips screwdriver No. 2
Normal screwdriver
Box driver (7 mm across)
Thickness gauge (0.44 m m )
Thickness gauge (0.47 mm)
6741000100
B740200 100
B740800400
B740800700
B740800800
6743800200
6743000100
B74 1700200
—
—
NOTE
All tools are commercially
Table 3-2. Equipment Required for Maintenance
3-1
REV.-A
3.1.3 Service Checks After Repair
When printer components are to be sent back to the customer after servicing, first 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
Item to Check
Is Check Required?
•
Are any wires broken?
❑ Checked, Not
l
necessary
•
Are any wires worn out?
Checked,
l
❑ Not necessary
Does the carriage move smoothly?
Movement noisy, ❑ Mechanism dirty,
❑ Mechanism oily
❑ Checked, Not
l
necessary
Is the carriage motor running at the correct
temperature and not overheating?
Checked,
l
❑ Not necessary
Checked,
l
•! Not necessary
Is the paper advancing smoothly?
❑ Movement noisy, ❑ Mechanism dirty,
❑ Mechanism oily
Checked,
l
•! Not necessary
•
Is the paper advance motor running at the
correct temperature and not overheating?
❑ Checked, Not
l
necessary
Paper• path
Is the type of paper in the printer feeding
smoothly?
❑ Checked, Not
l
necessary
•
Is the tractor feeding the paper correctly?
❑ Checked, Not
l
necessary
•
Is the paper path clear of all obstructions?
Checked,
l
❑ Not necessary
•
Is the platen free of damage?
Checked,
l
❑ Not necessary
•
Ribbon
mask
Is the ribbon mask free of distortion?
Checked,
l
❑ Not necessary
•
Self-print
test
Was the self-print test successful?
Checked,
l
•l Not necessary
On-line test
Was the on-line test successful?
•
Carriage
mechanism
•
•
Paper•
advance
mechanism
Checked, ❑ Not necessary
Is the platen gap adjusted correctly?
❑ Checked, ❑ Not necessary
•
Printing
Is the bidirectional print position adjusted
correctly?
Checked,
l
❑ Not necessary
DIP switch
settings
Have DIP switches been reset to their
ry shipment settings?
❑ Checked, ❑ Not necessary
ROM •
version
The ROM version is XXX.
•
Checked, lNot necessary
Has the ribbon been removed?
Checked,
!
❑ Not necessary
Have all relevant parts been included in the
shipment?
❑ Checked, ❑ Not necessary
REV.-A
3.1.4 Specifications for Screws
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
Part Neme
Abbreviation
CBS(C)
CB
CBS(0)
Cross-recessed Bind head Cone point S tight screw
Cross-recessed Bind head Cone point B tight screw
Cross-recessed Bind head screw
Cross-recessed Bind head S tight with screw with Outside toothed lock washer
Table 3-5. Types of Screws and Abbreviations
Body
Heed
Top
.
Washer
(assembled)
Side
washer
head
(with
toothed
lock washer
3.
,,
,
washer
.
3-3
REV.-A
3.2 DISASSEMBLY AND ASSEMBLY
This section describes the procedures for disassembling and assembling the main components of the
printer. When the procedure for installing a component into the printer is simply the reverse of the
procedure for removing the component, no description of how to install the component is given.
Any points of special concern when assembling or adjusting a component part are given after the
description of the procedure. It is important to take note of these points.
CAUTION
Before disassembling any part of the printer, note the warnings in Section 3.1.
Before disassembling any part of the printer, remove the paper and the ink ribbon.
Disassembly includes the following five procedures:
1. Removing the
2. Removing the case
3. Removing the electrical circuits
4. Removing the printer mechanism
5. Disassembling the printer mechanism
Diagrams in the appendix show how the components fit together. Refer to them as necessary.
I
Remove printer power cord
and interface cable.
Remove paper.
Section
Description
Remove ribbon cartridge.
3.2.1
3.2.5.12
Removing the Front Case
3.2.2.1
3-6
Changing the
Disassembling the Tractor Unit
3.2.2.2
3.2.3.3
3-6
Removing the Upper Case
3.2.4
3-9
3.2.5
3-8
Removing the Control Panel Board
3.2.3.1
Removing the Printer Mechanism
3-19
3-7
Removing the Main Board
3.2.3.2
Removing the Power Supply Board
3-10
Disassembling the Printer Mechanism
Figure 3-1. Flowchart for Disassembling the Printer
3-4
Page
REV.-B
3.2.1 Changing the
Remove the FRAME
2. Remove the COVER
SHEET GUIDE.
EJECT.
HEET GUIDE
EJECT
“(This illustration shows the
an 80-column printer. The difference
between the
and the LQ-
1070 is only in carriage width.)
Figure 3-2. Removing the FRAME
3. Release the two levers that hold the
SHEET GUIDE and the COVER
to the carriage. Lift out the
4. Remove the two FFCS (CABLE, HEAD,
from the
Figure 3-3. Removing the
3-5
EJECT
REV.-B
3.2.2 Removing the Printer Case
This section describes how to remove the front case and HOUSING
3.2.2.1 Removing the
1. Remove the COVER
UPPER.
FRONT
PRINTER, FRONT.
2. Remove the HOUSING, FRONT.
UPPER. Open
3. Use a screwdriver to release the clips that hold the front case to the HOUSING
the HOUSING, FRONT. Remove connector
1 on the BOARD
PANEL
PNL). Remove
the HOUSING, FRONT.
picture
shows an
printer)
I
Figure 3-4. Removing the HOUSING, FRONT
3.2.2.2 Removing the HOUSING
UPPER
1. Remove the COVER
PRINTER, FRONT, the COVER
the KNOB.
2. Remove the two CBS(C)
EJECT, the TRACTOR ASSY, and
X 10) screws that hold the optional interface card cover. Remove the
cover.
CBS(C) (M3X 10) Screws
COVER, CONNECTOR, UPPER
for Optional Interface Card
(*This picture is 80-column)
Figure 3-5. Removing the COVER, CONNECTOR, UPPER for the Optional Interface Card
3. Remove the HOUSING, FRONT (see Section 3.2.2. 1).
4. Remove the two
X 25) screws that hold the HOUSING
UPPER to the HOUSING
LOWER.
5. Depress the two clips that hold the HOUSING
Remove the HOUSING
UPPER to the FRAME
UPPER.
3-6
SHEET GUIDE.
REV.-B
3.2.3 Removing the Circuit Boards
This section describes how to remove the BOARD
POWER SUPPLY
MAIN
board) and the BOARD
3.2.3.1 Removing the BOARD
MAIN
MAIN board), the BOARD
PANEL
PNL board).
MAIN
Remove the HOUSING ASSY.,UPPER (see Section 3.2.2.2).
X 6) screws that hold the HOLDING PLATE,
to the SHIELD PLATE, MAIN
2. Remove the
BOARD . Remove the HOLDING PLATE,
(CABLE, HEAD, FRONT (, REAR)) removing the cables for the
and
3. Disconnect the
connectors on the main board.
4. Remove the three
(C)
X 10) screws that hold the SHIELD PLATE, MAIN BOARD to the BOARD
MAIN. Remove the SHIELD PLATE, MAIN BOARD.
X 14) Screw
X 6) Screw
SHIELD PLATE, RIGHT
HOLDING PLATE,
SHIELD PLATE,
MAIN BOARD
X 10)
BOARD
‘MAIN
MAIN Board)
X 10) Screws
Figure 3-6. Removing the SHIELD PLATE, MAIN BOARD
(M4X 10) screw that holds the SHIELD PLATE, RIGHT to the BOARD
MAIN.
5. Remove the
Remove the
X 14) screw that holds it to the HOUSING
LOWER. Remove the SHIELD
PLATE, RIGHT.
MAIN connectors:
(brown 12-pin),
6. Remove the cables for the following BOARD
(white 5-pin),
(white 6-pin),
(yellow 2-pin),
(black 2-pin), CN 10 (blue 2-pin), CN 11 (white
2-pin), and CN 12 (red 2-pin).
7. Remove the three
X 10) screws and CB
X 8) screws that hold the BOARD
MAIN
to the HOUSING
LOWER. Remove the BOARD
MAIN.
.
X 10) Screws
CB
X 8)’ Screw
Figure 3-7. Removing the BOARD
3-7
MAIN
MAIN
I
REV.-B
Point to Note for Assembly and Adjustment
After replacing the BOARD
MAIN, you must adjust the bidirectional print position
again to ensure bidirectional printing is correctly aligned (see Section 4.2).
3.2.3.2 Removing the BOARD
1. Remove the HOUSING
POWER SUPPLY
UPPER (see Section 3.2.2.2).
Board)
MAIN,
2. Remove the cable for connector CN 13 from the BOARD
1 from the BOARD
3. Remove the cable for connector
10) screws and the CB
4. Remove the four
POWER SUPPLY to the HOUSING
BOARD
POWER SUPPLY.
screws that hold the BOARD
LOWER. Remove the BOARD
POWER SUPPLY
POWER SUPPLY.
Board)
GROUNDING WIRE
(* 136-column only)
(80-column)
Figure 3-8. Removing the BOARD
(1 36-column)
POWER SUPPLY
3.2.3.3 Removing the BOARD
PANEL
PNL Board)
1. Remove the HOUSING, FRONT (see Section 3.2.2.1).
2. Remove the 10
Remove the BOARD
10) screws that hold the BOARD ASSY.,PANELto the HOUSING, FRONT.
PANEL.
, PANEL
ard)
HOUSING, FRONT
Figure 3-9. Removing the BOARD
3-8
PANEL
REV.-B
3.2.4 Removing the PRINTER MECHANISM
UPPER (see Section 3.2.2.2).
1. Remove the HOUSING
2. Remove the CB (M3X 6) screws that attach the HOLDING PLATE., FFC to the SHIELD PLATE, MAIN
BOARD. Remove the HOLDING
3. Disconnect the 2
BORAD
(brown 12-pin),
HEAD, FRONT(,REAR))from the
and
MAIN. Remove the cables for the following BOARD
(white 5-pin),
(white 6-pin),
connectors on the
MAIN connectors:
(yellow 2-pin),
(black 2-pin), CN1O
(blue 2-pin), CN 11 (white 2-pin) and CN12 (red 2-pin).
X 10) screw that holds the SHIELD PLATE., RIGHT to the BOARD
4. Remove the
(see Figure 3-6). Remove the
14) screws that hold it to the HOUSING
MAIN
LOWER.
Remove the SHIELD PLATE., RIGHT.
14) screws that hold the PRINTER MECHANISM to the HOUSING
5. Remove the three
LOWER. Remove the PRINTER MECHANISM.
SHIELD PLATE, RIGHT
X 14) Screws
X 14) Screws
(’This picture is 80-column.)
Figure 3-10. Removing the PRINTER MECHANISM
Point to Note for. Assembly and Adjustment
After replacing the PRINTER MECHANISM, you must adjust the bidirectional print position to ensure
bidirectional printing is correctly aligned (see Section 4.2).
3-9
I
REV.-B
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 MOTOR, CR
LOWER (see Section 3.2.4).
1. Remove the PRINTER MECHANISM from the HOUSING
2. Remove the printer spring (778 gm) from the base frame and the MOTOR, CR frame.
3. Remove the TIMING BELT from the BELT PULLEY.
LOWER.
4. Remove the MOTOR, CR frame from the HOUSING
screws that hold the MOTOR, CR to the FRAME
5. Remove the two CBS(0)
CR, MOTOR.
Remove the MOTOR, CR .
MOTOR, CR
EXTENSION SPRING, 778
FRAME
CR, MOTOR
6) Screws
FRAME, MAIN, BASE
Figure 3-11. Removing the MOTOR, CR
Points to Note for Assembly and Adjustment
See Section 3.2.5.13 for details on arranging and positioning the motor cable.
I
After removing the MOTOR, CR from the FRAME
CR, MOTOR, you must adjust the MOTOR,
CR backlash (see Section 4.1. 1). You also must adjust the bidirectional print position to ensure
bidirectional printing is correctly aligned (see Section 4.2).
3-1o
REV.-B
3.2.5.2 Removing the MOTOR, PF
1. Remove the PRINTER MECHANISM from the HOUSING
LOWER(see Section 3.2.4).
2. Remove the COMPRESSION SPRING, 200 that holds the platen shaft.
to the FRAME, MAIN, RIGHT.
3. Release the two clips holding the MOTOR,
4. Remove the MOTOR,
from the FRAME, MAIN, RIGHT.
FRAME, MAIN, RIGHT
PF
Figure 3-12. Removing the MOTOR,
Point to Note for Assembly
See Section 3.2.5.13 for details on arranging and positioning the motor cable.
(CABLE, HEAD,
3.2.5.3 Removing the
Remove the printhead (see Section 3.2. 1).
LOWER (see Section 3.2.4).
2. Remove the PRINTER MECHANISM from the HOUSING
from the clips that hold it along the rear side of the PRINTER MECHANISM. Make
3. Remove the
is free.
sure that the
from clip on the HOLDING PLATE,
at the rear of the PRINTER MECHANISM.
4. Remove the
to the base frame. Remove the
together
5. Remove the four clips that hold the HOLDING PLATE,
with the HOLDING PLATE,
.
.
CABLE, HEAD, FRONT
CABLE, HEAD, REAR
I
Figure 3-13. Removing the
Cable
Point to Note for Assembly
See Section 3.2.5.13 for details on arranging and positioning the
3-11
REV.-B
3.2.5.4 Removing the Carriage
Remove the FFC (CABLE, HEAD,
(see Section 3.2.5.3).
2. Remove the TIMING BELT from the carriage.
3. Use the box driver to rotate and free the adjusting bushing. This bushing holds the SHAFT, CR, GUIDE
to the FRAME, MAIN, RIGHT. Remove the bushing.
4. Remove the carriage unit together with the SHAFT, CR, GUIDE by pulling the SHAFT, CR, GUIDE a
little to the right.
PARALLEL,
ADJUST
UIDE
Figure 3-14. Removing the Carriage Unit
Point to Note for Assembly and Adjustment
After removing or rotating the adjusting bushing, you must adjust the platen gap (see Section
4.1 .2).
3-12
REV.-B
3.2.5.5 Removing the PLATEN
Remove the PRINTER MECHANISM from the HOUSING
LOWER (see Section 3.2.4).
2. Remove the two
X 10) screws that hold the COVER, PLATEN, LOWER to the left and
FRAME, MAIN, RIGHT. Remove the COVER, PLATEN, LOWER.
3. Remove the COMPRESSION SPRING, 200 that holds the platen shaft (see Section 3.2.5.2, step 2).
4. Set the head LEVER, G, ADJUST to the most forward position.
5. Remove the two clips that hold the LEVER, RELEASE to the platen shaft. Remove the LEVER, RELEASE
from the platen shaft.
6. Rotate the bushing by using the tweezers that holds the platen to the FRAME, MAIN, LEFT. Remove
this BUSHING, 8 with the GROUND SPRING.
7. Rotate the BUSHING, 8 by using the tweezers that holds the platen to the FRAME, MAIN, RIGHT.
Remove the PLATEN by lifting it up toward the right.
X 10) Screws
LEVER, RELEASE
PLATEN
EXTENSION SPRING, 43
Figure 3-15. Removing the PLATEN
I
Point to Note for Assembly
When inserting the LEVER, RELEASE onto the platen shaft, mesh the LEVER, RELEASE with the
mechanism correctly by positioning it at
mark on the auxiliary release shaft.
Mark
Figure 3-16. LEVER, RELEASE Insertion Positioning
3-13
REV.-B
3.2.5.6 Removing and Disassembling the FRAME, MAIN, RIGHT
LOWER (see Section 3.2.4).
1. Remove the PRINTER MECHANISM from the HOUSING
Remove the PLATEN from the PRINTER MECHANISM (see Section 3.2.5.5).
3. Remove the MOTOR, CR from the FRAME, MAIN, BASE (see Section 3.2.5. 1).
4. Remove the two CBS(C)(P) (M3 X 10) screws that hold the FRAME, MAIN, RIGHT to the FRAME, MAIN,
BASE. Remove the FRAME, MAIN, RIGHT from the FRAME, MAIN, BASE.
5. Remove the following items from the FRAME, MAIN, RIGHT in the specified order: MOTOR, PF (see
Section 3.2.5.2), CAM, CLUTCH, TRACTOR, COMBINATION GEAR, 8.5,30, SPUR GEAR, PLAIN
WASHER, COMPRESSION SPRING 200, and SPUR GEAR, 16.
CBS(C)(P) (M3X
Screws
FRAME, MAIN,
G, 200
, PF
COMBINATION GEAR, 8.5, ”30
\
CAM, CLUTCH, TRACTOR ‘
Figure 3-17. Disassembling the FRAME, MAIN, RIGHT
Point to Note for Assembly
I
When installing the PLAIN WASHER, insert it from the front in the direction indicated by the mark.
I
PLAIN
Mark Side
Figure 3-18. Direction for Inserting the PLAIN WASHER
3-14
REV.-B
3.2.5.7 Removing and Disassembling the PAPER GUIDE (Including the DETECTOR
1. Remove the PRINTER MECHANISM from the HOUSING
HP)
LOWER (see Section 3.2.4).
2. Remove the PLATEN from the PRINTER MECHANISM (see Section 3.2.5.5).
3. Remove the FRAME, MAIN, RIGHT from the FRAME, MAIN, BASE (see Section 3.2.5.6).
4. Remove the three springs (32 gm) from the lower side of the PRINTER MECHANISM . (These springs
join the PAPER GUIDE support to the FRAME, MAIN, BASE.)
5. While holding open the clips that secure the PAPER GUIDE to the FRAME, MAIN, BASE, slide the
PAPER GUIDE to the left. Remove the PAPER GUIDE.
IDE
AIN, BASE
(“ This picture is 80-column)
EXTENSION SPRING, 43
Figure 3-19. Removing the PAPER GUIDE
6. Open the clips that hold the SPUR GEAR, 18 to the ROLLER
GEAR, 18 from the ROLLER
7. Remove the ROLLER
DRIVE. Remove the SPUR
DRIVE.
DRIVE from the PAPER GUIDE.
8. Slide the PAPER GUIDE support to the right. Remove the PAPER GUIDE support from the PAPER
GUIDE.
PAPER GUIDE
(“ This picture is 80-column)
R, 18
ROLLER
PAPER
Figure 3-20. Removing the PAPER GUIDE
3-15
A&W., SUPPORT
SUPPORT
REV.-B
9. While holding down the three LEVER
the LEVER
PF, pull out and remove the SHAFT, RELEASE Remove
PF and the COMPRESSION SPRING, 1300 from the PAPER GUIDE.
RELEASE to the PAPER GUIDE,
10. While holding open the clips that secure the DETECTOR
remove the DETECTOR
RELEASE.
LEVER
PF
(* This picture is 80-column. 136-column
printer has four Paper advance Rollers and
four
‘~
COMPRESSION SPRING, 1300
‘
SHAFT, RELEASE
I
Figure 3-21. Removing the LEVER
PF
Point to Note for Assembly
I
Insert the SHAFT, RELEASE in the PAPER GUIDE in the way shown in the diagram below.
I
I
Figure 3-22. How to Insert the SHAFT, RELEASE
3-16
REV.-B
3.2.5.8 Removing the DETECTOR
HP
LOWER (see Section 3,2.4).
1. Remove the PRINTER MECHANISM from the HOUSING
2, Remove the clips from the rear side of the FRAME, MAIN, BASE that hold the DETECTOR
Remove the DETECTOR
DETECTOR
HP
Figure 3-23. Removing the DETECTOR
REAR
3.2.5.9 Removing the DETECTOR
1. Remove the PRINTER MECHANISM from the HOUSING
2. Remove the two
HP.
HP from the rear of the FRAME, MAIN, BASE.
HP
LOWER (see Section 3.2.4).
(M3 X 10) screws that hold the COVER, PLATEN, LOWER to the frame. Remove
the COVER, PLATEN, LOWER.
3. Remove the clips that hold the DETECTOR
DETECTOR
REAR in the PAPER GUIDE. Remove the
REAR .
DETECTOR
REAR
Figure 3-24. Removing the DETECTOR
3-17
REAR
REV.-B
3.2.5.10 Removing the DETECTOR
FRONT
LOWER (see Section 3.2.4).
1. Remove the PRINTER MECHANISM from the HOUSING
FRONT to the FRAME, MAIN, BASE. Remove the
2. Open the clips that hold the DETECTOR
DETECTOR
FRONT.
DETECTOR
,
I
I
Figure 3-25. Removing the DETECTOR
PLATEN
3.2.5.11 Removing the DETECTOR
Remove the PRINTER MECHANISM from the HOUSING
Remove the clips that hold DETECTOR
DETECTOR
FRONT
LOWER (see Section 3.2.4).
PLATEN to the FRAME, MAIN, LEFT. Remove the
PLATEN.
n
I
PLATEN
/ L e f t
1’
II
Figure 3-26. Removing the DETECTOR
3-18
PLATEN
REV.-B
3.2.5.12 Disassembling the TRACTOR
Remove the TRACTOR
from the printer.
2. Remove the SPUR GEAR, 17 from the SHAFT, TRACTOR.
3. Remove the FRAME, TRACTOR, RIGHT from the SHAFT, TRACTOR and the SHAFT, TRACTOR, GUIDE.
4. Remove RETAINING RING from the SHAFT, TRACTOR.
5. Remove the TRACTOR ASSEMBLY (RIGHT), the PAPER SUPPORT unit, and the TRACTOR ASSEMBLY
[LEFT) from the SHAFT, TRACTOR and SHAFT, TRACTOR, GUIDE.
SHAFT, TRACTOR, GUIDE
/
RETAINING RING
FRAME TRACTOR,
RIGHT’
SHAFT, TRACTOR
SPUR ‘GEAR, 17
Figure 3-27. Disassembling the TRACTOR
3-19
I
3.2.5.13 Arranging the Cables
Figure 3-28 shows how the cables are arranged for the PRINTER MECHANISM. When assembling the
printer, make sure that the cables are laid out as shown in this figure.
PRINTER MECHANISM (Bottom)
n
(*This is an 80-column printer.)
Figure 3-28. Arranging the Cables
3-20
REV.-B
CHAPTER 4
ADJUSTMENTS
4.1 ADJUSTING THE PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.1 MOTOR, CR Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
..
4.1.2 Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.2 BIDIRECTIONAL PRINT POSITION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . 4-4
4.2.1 Overview of Bidirectional Print Position Adjustment . . . . . . 4-4
4.2.2 Bidirectional Print Position Adjustment Procedure . . . . . . . . . . 4-4
..
4.3 CIRCUIT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
4.3.1 Adjustment Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
...
LIST OF FIGURES
Figure 4-1. MOTOR, CR Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Figure 4-2. Removing the RIBBON MASK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. -2
Figure 4-3. The Adjusting Bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
.
...
Figure 4-4. Platen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
I
REV.-B
4.1 ADJUSTING THE PRINTER MECHANISM
This section describes the various adjustments you may need to make to the PRINTER MECHANISM.
4.1.1 MOTOR, CR Backlash Adjustment
In the MOTOR, CR backlash adjustment, the pinion gear of the MOTOR, CR 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.
CR, MOTOR, from the PRINTER MECHANISM
Remove the MOTOR, CR, along with the FRAME
(see Section 3.2.5.1).
Loosen the two CBS(0) (M3X 6) screws that hold the MOTOR, CR to the FRAME
CR, MOTOR.
Check the alignment of the MOTOR, CR pinion gear with the BELT PULLEY cog. Move the MOTOR,
CR until you judge that there is a gap of about 0.05 -0.15 mm between the two. Tighten the two
CBS(0) (M3 X 6) screws.
o
“
\
..0
Figure 4-1. MOTOR, CR Backlash Adjustment
4-1
REV.-B
4.1.2 Platen Gap Adjustment
If you have rotated or reassembled the SHAFT, CR, GUIDE or the adjusting bushing, or if printing is
abnormal, you must adjust the gap between the PLATEN and the
I
Remove the PRINTER MECHANISM from the HOUSING
LOWER (see Section 3.2.4).
2. Remove the
from the carriage (see Section 3.2. 1).
3.
Use
tweezers
to
remove
the RIBBON MASK from the carriage.
I
/
I
RIBBON MASK
\
‘
Figure 4-2. Removing the RIBBON MASK
I
4.
5.
6.
7.
8.
on the carriage.
Remount the
Set the paper-thickness LEVER, G, ADJUST to position O (the second step position).
Move the LEVER, RELEASE back to the friction setting.
is at the 5th column print position.
Move the carriage until the edge of the
Use the box driver (7 mm) to rotate the adjusting bushing on the FRAME, MAIN, RIGHT of the PRINTER
MECHANISM.
Box Driver
BUSH, PARALLEL, ADJUST
Figure 4-3. The Adjusting Bushing
4-2
9. Rotate the adjusting bushing until the platen gap
large enough for a thickness gauge of 0.44
mm thickness but too narrow for one of 0.47 mm thickness.
0.45 mm
PLATEN
/
+
Figure 4-4. Platen Gap
10.
Move the carriage until the edge of the
is at the 75th column print position.
Use the box driver (7 mm) to rotate the adjusting bushing on the FRAME, MAIN, RIGHT of the
PRINTER
MECHANISM.
I
12. Rotate the adjusting bushing until the platen gap is large enough for a thickness gauge of 0.44
mm thickness but too narrow for one of 0.47 mm thickness.
back again so that the edge of the
is at the 5th column print position.
13. Move the
Check the platen gap again with the thickness gauge. It should still be large enough for a thickness
gauge of 0.44 mm thickness but too narrow for one of 0.47 mm thickness. If this is not the case,
go back to step 8.
14. Center the carriage. Check the platen gap again with the thickness gauge. It should still be large
enough for a thickness gauge of 0.44 mm thickness but too narrow for one of 0.47 mm thickness.
If this is not the case, go back to step 8.
15. Remove the
install the RIBBON MASK and then replace the
4-3
I
REV.-B
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 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 a fraction during
printing while the carriage moves from right to the left, it is possible to line up the printing done in
this direction so that it will match the printing done in the left to right direction. This procedure to alter
the timing is called 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
I
I
to each printer. The unique skew correction value for each printer has to be written to
BOARD
MAIN
MAIN BOARD).
Whenever the PRINTER MECHANISM, or the BOARD
changed during
MAIN
on the
MAIN BOARD) itself, is
the bidirectional print position must be readjusted and a new bidirectional
skew correction value must be written to
4.2.2 Bidirectional Print Position Adjustment Procedure
Initial operation
I
Before performing the bidirectional alignment adjustment, complete the initial operation below:
Position the LEVER, G, ADJUST at position O. * Verify that the DIP switch 1-6 is on).
Verify that the DIP switch setting for country is U.S. (DIP switches 1-1, 1-2, 1-3 are on).
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,
and LOAD\ EJECT buttons.
2. The printer enters draft mode and prints the reference value and
4-4
characters for 4 lines.
Are the characters aligned vertically?
GO TO STEP 4 .
3. Referring the odd-numbered lines (Ist and 3rd), 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
button. (The reference value increases
+ 1 and even lines shift to the left.)
●
If the even-numbered lines are shifted to the left:
Press the
button once while pressing the
button. (The reference value decreases — 1
and even lines shift to the right.)
and LOAD/EJECT buttons at the same time.
4. Press the
5. The printer enters
lines.
mode, and the printer prints the reference value and the
characters for 4
GO TO STEP 6.
Are the characters aligned vertically?
GO TO STEP 7.
YES
6. Referring to the odd-numbered lines (1st and 3rd), 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
button. (The reference value
increases + 1 and even lines shift to the left.)
●
If the even-numbered lines are shifted to the left:
Press the
button once while pressing the
and even lines shift to the right.)
7. Turn printer power off.
4-5
button. (The reference value decreases — 1
REV.-B
4.3 CIRCUIT ADJUSTMENT
The BOARD
MAIN
MAIN BOARD) contains variable resistor
which is used for
balancing the circuitry. When any of the following parts are replaced, the circuitry must be balanced
again by adjusting this variable resistance:
RI 5, R13,
and VR 1
If the circuitry is not correctly balanced in this way, the CPU A\D converter fails to function normally
and printer operation is affected.
4.3.1 Adjustment Process
I
Attach a digital
to the check terminal TP2
voltage) on the BOARD
MAIN BOARD). Turn on printer power and turn variable resistor
obtained.
4-6
MAIN
until a reading of 4.741 V is
REV.-B
CHAPTER 5
TROUBLESHOOTING
5.1
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
.
5.2 REPAIR BY UNIT REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
5.3 REPAIR OF THE BOARD
MAIN
MAIN BOARD)
. -17
5.4 REPAIR OF THE PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LIST OF FIGURES
Figure 5-1.
Troubleshooting
.
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Figure 5-2.
LIST OF TABLES
Table 5-1.
Motor and
Coil Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Table 5-2.
...
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Table 5-3.
Symptoms and Reference Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. -2
Table 5-4.
Repair of a Problem in the BOARD
MAIN
..
MAIN BOARD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-14
Table 5-5.
Repair of the PRINTER MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-B
5.1 OVERVIEW
Problems in the printer may exhibit a variety of symptoms, which can complicate the task of
troubleshooting, unless you follow the procedure shown in the flowchart below.
START
5.2
5-2
Repair by
unit replacement
1
5.3
5-14
Repair of the
BOARD
5-15
5.4
Repair of the printer
mechanism
MAIN
.
The fault is corrected
Figure 5-1. Troubleshooting Procedure
The following tables provide troubleshooting information.
Coil Resistance
Table 5-1. Motor and
I
Specifications
Part
MOTOR, CR
Coil resistance 19.5 ohms
MOTOR, PF
Coil resistance 79.0
3.2 ohms ‘at 25 degrees C (77 degrees F)
Table
Buzzer beeps 3 times
7% at 25 degrees C (77 degrees F)
5 ohms at 25 degrees C (77 degrees F)
Coil resistance 45.5
Error Codes
Error
Error
for Paper-out error
Cause
●
Printer is out of paper.
. DETECTOR
0.1 second, with O.
I
PE, FRONT (, REAR)
intervals.
Buzzer beeps 5 times for
0.5 second, with
intervals.
Carriage error
.
. MOTOR, CR malfunction.
Carriage mechanism malfunction.
● MOTOR, CR driver current malfunction.
I
I
REV.-B
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.
and Reference
Table 5-3.
See Page
Problem
Symptom
Printer fails to operate when
●
power is on.
Carriage does not move.
Control panel indicator lamp does not light.
. 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.
Carriage operation is abnorreal.
Printing is faulty during
test, but carriage operation is
normal.
.
5-3
5-4
5-5
No printing at
. Faulty printing - some of the dots are not printed.
. No paper is fed.
Regular paper feed, but with variations in the separations between lines.
5-9
When the LF switch is activated, no paper is fed.
5-12
Carriage operates normally at power on, and self-test
is executed correctly.
● Print data from the computer, however, is not printed
correctly.
5-13
Paper feeding is abnormal.
●
Control panel operation is
abnormal.
Printing of data sent by the
host computer is faulty.
●
●
The repair procedure flowcharts are represented using the following symbols:
Start
Branching
Processing
Returning to the Start of the item
Forwarding to another
End
item
Decision
5-2
REV.-B
(1) Printer Fails to Operate when Power is On
START
correct AC
input voltage.
Replace the fuSe
and disconnect
the main
No
is turned ON
Measure the output voltage
board.
from the Power
.
1
Replace the BOARD
PoWER SUPPLY.
No
Replace the PRINTER
I
1
MECHANISM.
I
END
5-3
REV.-B
(2) Carriage Operation is Abnormal
CN 12,CN8,CN9,CN 10,
and CN7
connecting the BOARD
MAIN and the PRINTER
MECHANISM inserted
Secure
I
connectors.
I
Yes
No
END
No
Refer to section 5.5,
Repair of the PRINTER
MECHANISM.
Yes
No
the fault corrected?
Yes
Replace the BOARD
MAIN.
END
5-4
REV.-B
Printing is Faulty During Self-Test, but Carriage Operation is Normal
START
Set the head
ADJUST to the 2nd
position, and perform
and CN7 connecting the
MAIN
BOARD
and the PRINTER MECHANISM.
any
Perform bidirectional
printing adjustment.
A
No
the fault corrected?
Replace the printhead
END
Yes
the fault corrected?
Replace the BOARD
MAIN.
AS
Check
resistance.
Yes
Replace
chips.
Yes
Replace
Replace
and logic
Yes
No
Replace logic
No
Q
D
I
Check
resistance again.
I
Replace
cable.
Replace
/\
1
1
Perform final
test.
I
REV.-A
# 2 0
# 4 0
# 6 0
# 8 0
o
o
o #7
o
o #11
#5
#9
o
o
o
o
o
< Wire
#15
#17
#19
#21
Assignment )
Coil Resistance:
45.5
at 25°C
(Between each dot wire and common.)
#20
#24
@
#
<
#16
{
@
cOM.
@
@
@
21
~
#5
Terminal Assignment )
Figure 5-2. Printhead Resistance
5-8
(4) Paper Feeding is Abnormal (but Printing is Normal)
START
No
Load the paper correctly.
i
A
platen knob rotate
manually with power
Refer to
5.5,
Repair of the PRINTER
MECHANISM.
I
Replace the BOARD
MAIN.
No
Replace the BOARD
No
Replace the BOARD
5.5,
Refer to
MAIN and the MOTOR, PF.
Repair of the PRINTER
MECHANISM.
,
I
v
5-9
MAIN.
I
No
Yes
1
Replace defective
m oto r.
Replace logic PCB.
NOTE
NOTE
B
Check motor resistance.
Perform final
test.
No
Replace motor and
cable.
END
NOTE
Yes
Replace
motor.
NOTE
No
No
v
1
Yes
I
Perform final test.
NOTE: Perform bidirectional print alignment adjustment.
5-1o
Inspect gears for damage
or debris.
Clean or replace.
Check left and right tractor
assembly for proper phasing.
Yes
No
<
.
Adjust phasing or replace
sprocket assembly.
No
paper path.
Reform final test.
END
5-11
Yes
REV.-B
(5) Control Panel Operation is Abnormal
MAIN connected
Reinsert connector CN3
correctly.
Is the
fault corrected?
Yes
I
END
v
Replace the BOARD
Replace the BOARD
PANEL.
No
Replace the BOARD
MAIN.
5-12
Replace the BOARD
PANEL.
MAIN.
(6) Printing of Data Sent by the Host Computer is Faulty
NOTE: It is assumed here that the host computer is operating normally.
Perform
self-test
printing.
No
Refer to other troubleshooting
items.
Replace the BOARD
L
I
5-13
I
MAIN.
I
REV.-B
5.3 REPAIR OF THE MAIN BOARD
MAIN 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
This section provides instructions for repairing the BOARD
be bad. Check these values and take the appropriate action.
Table 5-4. Repair of a Problem in the BOARD
I
Problem
The printer
does not operate at all.
Symptom
The CPU does
not operate.
Selection of
control ROM
is abnormal.
Solution
Checkpoint
Cause
The reset circuit is not
operational.
MAIN
Check the voltage waveforms for the
line
pin 52) and for the
Replace
signal
pin 73) when power is on.
Check the voltage waveforms for the
signal
pin 73) and for the
RESET signal
pin 4) when power is
on.
Replace
Check pin 21 of ICIC for a HIGH Vx
voltage (NM I signal).
Replace
Check pin 36 of
signal
Replace
5-14
for a change in the
1 C.
REV.-B
Problem
printer
not
at all.
Table 5-4. Repair of a Problem in the BOARD
MAIN (Cont.)
Checkpoint
Cause
Symptom
The CPU does
not operate.
abnormally.
The carriage
does not operate at all.
Carriage operation is unstable (lack of
torque).
Solution
Replace IC5E
Either ROM or
RAM is
defective.
the oscillator signal at either pin 33
pin 34 of the CPU.
CPU is
defective.
carriage
I
If a signal is
detected, replace ICI C.
Otherwise, replace CR1.
ICI C is
defective.
Check the MOTOR, CR phase signal at pins
9, 10, 11, and 12 of
Replace
is
defective.
At
Replace
is
defective.
check the input signal for pin 90
and the output waveform for pin 100.
Replace
C.
Table 5-4. Repair of a Problem in the BOARD ASSY., MAIN (Cont.)
I
Problem
Symptom
Cause
Checkpoint
Self-test print-
Self-test is
not executed.
The CPU can’t
measure the
voltage on
the
line.
Measure the voltage at Vref (pin 1) of
ing is
abnormal.
is
defective.
Solution
Adjust VR 1.
1 C. The normal voltage is 4.741 V.
At
check the input signal at pin 101
and the output signal at pin 46.
Replace
A particular
dot is not being printed.
is
defective.
Replace
‘a per is not
‘ed normally.
The paper
does not
feed, or the
feed pitch is
abnormal.
is
defective.
Replace
of daa from the
Data
tion occurs
when the
interface
is used.
or
is defective.
Replace
or
is faulty.
5-16
5.4 REPAIR OF THE PRINTER MECHANISM
For detailed procedures for replacing or adjusting parts, refer to Chapter 3,
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 5-5. Repair of the PRINTER MECHANISM
Problem
The MOTOR, CR
fails to operate.
carriage does
not operate
really at power on
[after the carriage
has been manually
prior to
power on).
printing
not execute.
Symptom
Cause
Checkpoint
The MOTOR, CR
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
eign substances.
The MOTOR, CR is
defective.
Measure the coil
sistance of the
The resistance
should be about
19.5 ohms.
Replace the
CR.
The BELT PULLEY
is defective.
Check for broken
or worn pulley.
Replace the BELT
PULLEY.
The TIMING BELT
is defective.
Check that the
BELT is
inserted into
the bottom of the
carriage.
Reinsert the
BELT.
Check for a broken
timing belt.
Replace the timing
belt.
The MOTOR, CR
rotates, but the
carriage does not
move.
Solution
The carriage
moves left slightly,
then stops.
Carriage movement is not
smooth.
Check whether the
carriage moves
smoothly when
moved manually.
Clean and
lubricate.
Replace the
CR.
The carriage
moves to the left
or right end, then
stops.
The DETECTOR
HP is
defective.
Use a
check the
DETECTOR
HP.
Replace the
The carriage
moves, but no
printing is
performed.
The printhead
(CABLE, HEAD,
FRONT (, REAR) )
common wires are
disconnected.
Check the common
wires for the printhead
(CABLE,
HEAD, FRONT
(, REAR) ).
5-17
to
HP.
Replace the
(CABLE, HEAD,
FRONT (, REAR) ).
Table 5-5.
Problem
Self-test printing is
abnormal.
Symptom
A particular dot
fails to print.
of the PRINTER MECHANISM (Cont.)
Cause
The
defective.
Checkpoint
is
Measure the coil
of the
The normal value is approximately 45.5
Solution
Replace the
ohms.
The printing is too
light, or the print
density is not
uniform.
Paper feeding is
Printing is performed, but the
per is not fed, or is
not fed uniformly.
Check whether the
dot wire is worn.
Replace the
is
Check whether the
tip of the dot wire
is worn.
Replace the
The platen gap is
not properly
adjusted.
Set the gap LEVER,
G, ADJUST to the
second position,
and check the gap
between the tip of
and
the
the PLATEN.
The appropriate
value is 0.46 mm.
Adjust the gap.
Refer to Section
4.1.2, Platen Gap
Adjustment.
Foreign substances
are lodged in the
paper path.
Perform a visual
check of the paper
path.
Remove any
substance.
The MOTOR, PF is
not driving the
gear correctly.
Check that no
substance is
lodged between
the gears, and that
the gears are not
broken or worn.
. Remove any
substance.
. Replace the
per-feed
tion gear.
● Replace the plat
en gear.
The MOTOR, PF is
defective.
Measure the coil
for the
MOTOR,
The approximate
value should be 79
ohms.
Replace the
TOR,
The
defective.
5-18
REV.-B
Table 5-5.
Problem
The ribbon feed is
abnormal.
becomes
continues
fter the paper
or when no
is loaded.
of the PRINTER MECHANISM (Cont.]
I
Checkpoint
Solution
The ribbon cartridge is defective.
Dismount the ribbon cartridge,
tate 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
eign substance.
● Replace the
bon-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 ribbon
cartridge.
Ink stains appear
on areas where
there is pinting.
The RIBBON MASK
is not correctly
positioned.
Check whether the
RIBBON MASK is in
the correct
position.
Reinstall the
BON 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
head and the
PLATEN.
The appropriate
value is 0.46 mm.
Adjust the gap.
Refer to Section
4.1.2, Platen Gap
Adjustment.
The DETECTOR
FRONT
(, REAR)
Check the
TOR
FRONT (, REAR)
Replace the
Symptom
The ribbon is not
fed.
Printing continues
past the paper
end.
Cause
5-19
FRONT (, REAR)
REV.-B
CHAPTER 6
MAINTENANCE
6.1
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2 LUBRICATION AND ADHESIVE APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
LIST OF FIGURES
Figure 6-1. Correct Adhesive Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
..
Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
.
Figure 6-3. LQ-107O Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
LIST OF TABLES
Table 6-1. Lubricants and Adhesive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6-2. Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
.
Table 6-3. Adhesive Application Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
&i
REV.-B
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.
Disconnect the printer from the external AC power source before performing maintenance. Do not
or ketone-based solvents on the plastic components of the printer.
use thinner,
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.
6-1 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 6-1 indicates the point
at which adhesive must be applied following disassembly or replacement. EPSON recommends that
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
Quantity
40 cc
40 gm
40 gm
o-2
G-20
G-26
lock #2 (G)
gm
Availability
Part No.
E
E
E
B7 10200001
B702000001
B702600001
E
B730200200
E: EPSON-exclusive product
6-1
I
REV.-A
Table 6-2. Lubrication Points (Refer to Figure 6-2)
Ref. No.
Lubricant
Lubrication Points
1
1/4 of the perimeter of the top edge of the gear (8.5 mm, 30 mm)
G-26
2
1/3 of the perimeter of the top edge of the gear (40 mm)
G-26
3
1/3 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
Portion of platen shaft that contacts ground spring
G-20
7
Gear (40 mm) shaft
G-26
8
Gear (8.5, 30 mm) shaft
G-26
9
Ribbon-feed gear shafts
G-26
10
Gear (1 1.5 mm) shaft
G-26
11
Portion of paper guide that contacts gear (18 mm)
G-26
12
Portion of paper guide that contacts sub paper guide
G-26
13
Portion of release shaft that contacts paper guide
G-26
14
Portion of paper tension roller shaft that contacts paper tension frame
G-26
15
Portion of tractor shaft that contacts tractor frame (left)
G-26
16
Tractor clutch cam
G-26
o-2
NOTE: Lubrication must be applied during the reassembly process.
Table 6-3. Adhesive Application Point (Refer to Figure 6-l.)
Adhesive Application Point
Portion where timing belt engages the
No. of Points
1
carriage
Figure 6-1. Correct Adhesive Application
6-2
REV.-A
Figure 6-2.
Lubrication Points
6-3
REV.-B
6-4
REV.-B
APPENDIX
..
CONNECTOR SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
CIRCUIT BOARD COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 2
EXPLODED Diagram........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
..
CASE OUTLINE DRAWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-20
LIST OF FIGURES
Figure
Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure A-2.
BOARD
MAIN
MAIN BOARD)
Circuit diagram (Annotated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Figure A-3.
BOARD
POWER
BOARD) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Figure A-4.
BOARD
POWER
BOARD) Circuit Diagram (Annotated) . . . . . . . . . . . . . . . . . . A-7
Figure A-5.
BOARD ASS., POWER
BOARD) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-8
..
Figure A-6.
BOARD
POWER SUPLY
BOARD) Circuit Diagram (Annotated) . . . . . . . . . . . . . . . . . . A-9
Figure A-7.
BOARD
POWER SUPPLY
BOARD) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 O
Figure A-8.
BOARD
PANEL
BOARD) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure A-9.
BOARD
1
PANEL
MAIN BOARD) Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Figure A-1 O. BOARD
BOARD) Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 3
Figure A-1 1. BOARD
POWER
BOARD) Component Layout . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . A-1 4
Figure A-1
BOARD
PANEL
BOARD) Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 5
Figure A-1 3.
6
.
Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Figure A-14, LQ-107O Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 7
Figure A-1
Figure A-1
Figure A-1 7.
O Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 8
Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 9
Case Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... A-22
Figure A-18. LQ-1 070 Case Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-23
A-i
REV.-B
LIST OF TABLES
Table A-1.
.
Board Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Table A-2.
BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Table A-3.
BOARD
MAIN
MAIN). . . . . . . . . . . . . . . . . . . . . . . . . A-3
Table A-4.
BOARD
MAIN
MAIN). . . . . . . . . . . . . . . . . . . . . . . . . A-3
Table A-5.
BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Table A-6.
BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Table A-7.
BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-8.
BOARD
MAIN
MAIN). . . . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-9.
BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-1 O.
CN1O BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-1 1.
BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-1 2.
CN12 BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-1 3.
CN13 BOARD
MAIN
MAIN) . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-14.
.
Part No. Reference Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-20
. ..
REV.-B
CONNECTOR SUMMARY
Figure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes the
functions and sizes of the connectors.
BOARD
PANEL
Model 5E10/5E60 PRINTER MECHANISM
GAP
BOARD
LEVER CRHOME
MAIN
CR MOTOR PF MOTOR
HEAD HEAD
I
MAIN BOARD)
BOARD
POWER SUPPLY
CN
PSE BOARD)
I
t
Optional
I nterf ace
Card
1
AC IN
I
Figure A-1. Cable Connections
A-1
REV.-B
Table A-1. Board Connector Summarv
Board
BOARD
MAIN
BOARD)
Function
Connector
1
MAIN
Pins
Parallel interface
Optional interface card
Control panel
36
36
MOTOR, CR
5
MOTOR, PF
5
12
17
CN 10
CN 11
BOARD
PLY
BOARD
DETECTOR
DETECTOR
DETECTOR
HP (HP sensor)
REAR
PRONT
DETECTOR
PLATEN
CN 12
CN 13
RELEASE
DETECTOR
DC power input BOARD
(POWER
POWER
BOARD)
CN 1
AC power input
PANEL
CN 1
BOARD
MAIN
A-2
2
2
2
2
board)
2
DC power output (BOARD
PNL BOARD)
15
2
MAIN):
MAIN board)
MAIN board)
1
2
REV.-B
Table A-2.
No.
BOARD
MAIN
MAIN) Table A4.
No.
Function
Signal Name
1
2
-
+5
+5
+5
+5
3
4
-
+ 5
+ 5
+5
2
3
4
5
+5
+5
+5
5
-
+ 5
6
-
+ 5
7
8
0
0
/READY
Ready to receive data
9
10
I
-
NC
Receive data
No connection
11
12
13
0
0
I
14
I
15
16
17
18
I
0
Transmit data
/RST
INH
19
20
21
-
22
-
23
24
-
25
0
A3
26
27
0
0
A2
Al
28
29
0
AO
D7
33
34
2
3
4
5
6
7
8
9
10
11
12
No.
Address bus bit 1
Address bus bit O
Data bus bit 7
Data bus bit 6
D5
Data bus bit 5
D4
D3
Data bus bit 4
Data bus bit 3
D2
Data bus bit 2
Data bus bit 1
DO
Data bus bit O
BOARD
/PAUSE
/READY
+5
SHLD
POWER I
POWER2
MAIN
MAIN)
Function
Pause switch
Fixed
Transmit signal (LED)
LED data latch
Shift clock
Load switch data
Receive data (switch)
+5
Signal ground
Shield ground
Power switch
Fixed
A-3
BOARD
I
0
0
0
0
0
0
Nama
PFA
PFB
PFC
PFD
PFCOM
BOARD
Signal Name
1
0
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
I
-
MAIN
I
MAIN)
Function
MOTOR, CR phase A
MOTOR, CR phase B
MOTOR, CR phase C
MOTOR, CR phase D
MOTOR, CR common
CRA
CRB
CRC
CRD
Table A-6.
Signal ground
Address bus bit 3
Address bus bit 2
Signal Name
0
0
0
0
I
I
-
Inhibit
Command request
Signal ground
Table A-3.
No.
2
3
4
5
6
Signal ground
Signal ground
35
36
Reset
Signal ground
Signal ground
30
31
32
o
0
0
0
0
No.
Write
Read
Chip select
/WR
Signal Name
Table A-5.
Write ready
Read request
0
0
-
BOARD
HD5
HDI
HD 13
HD9
HD21
HD17
COM
COM
COM
HD24
HD16
HD 12
HD8
HD20
HD4
TEMP2
TEMP 1
MAIN
I
MAIN)
Function
MOTOR, PF phase A
MOTOR, PF phase B
MOTOR, PF phase C
MOTOR, PF phase D
MOTOR, PF common
MOTOR, PF common
MAIN
MAIN
I
Function
Head data 5
Head data 1
Head data 13
Head data 9
Head data 21
Head data 17
Common
Common
Common
Head data 24
Head data 16
Head data 12
Head data 8
Head data 20
Head data 4
Head temperature
I
REV.-B
Table A-7.
No.
Signal Name
1
0
2
3
4
5
6
7
8
9
10
11
12
0
0
0
0
0
0
0
0
0
0
0
14
15
BOARD
No.
HD 19
HD 15
HD 18
HD 10
HD14
BOARD
Signal Name
I
I
CRHOME
Table A-9.
No.
1
2
BOARD
Signal Name
Table A.1O.
I
2
I
BOARD
Signal Name
No.
0
2
3
4
5
6
7
8
9
10
11
MAIN
Signal Name
Function
BOARD
Signal Name
LEVER
2
-
Psc
+5
+5
+35
+35
+35
Function
Power switch signal
+5
+5
Signal ground
Signal ground
Signal ground
Signal ground
Signal ground
+35
+35
+35
I
I
DETECTOR
MAIN
MAIN)
Function
MAIN)
MAIN
Function
Function
DETECTOR
GAP
Table A-12.
No.
-
MAIN)
MAIN)
Table A-1 1. CN11 BOARD ASSY.,MAIN(C062 MAIN)
1 I
I I
Signal Name
MAIN
ASSY.,PE,FRONT
Signal ground
I
-
No.
I
Function
BOARD
ASSY.,PE, REAR
Signal ground
-
No.
Table A-13.
MAIN)
Head data 3
Head data 11
Head data 2
Head data 19
Head data 7
Common
Common
Common
Head data 22
Head data 15
Head data 18
Head data 23
Head data 10
Head data 14
Head data 6
HD 11
Table A-8.
MAIN
.
I
PLATEN
MAIN
MAIN)
Function
DETECTOR
ground
RELEASE
A-4
.
z
I
-
b
1
I
r
II
-1
I
Figure A-4. BOARD
POWER
PSB
A-7
Diagram
REV.-B
II I
II
T
.
.
I
Figure A-5. BOARD
PSB Board) Circuit Diagram
POWER
A-8
Rectifier
Figure A-6. BOARD
Filter
POWER SUPPLY (C062 PSE BOARD) Circuit Diagram (Annotated) 1
A-9
REV.-B
I
I
1
t
1
.
Figure A-7. BOARD
POWER SUPPLY
A-1 O
PSE Board) Circuit Diagram
REV.-B
i
‘m
I
I
Figure A-8. BOARD
PANEL (C062 PNL BOARD) Circuit Diagram
A-1 1
REV.-B
A-3.
BOARD COMPONENT LAYOUT
1
1
1
1
1
1
1
1
1
I
1
1
1
1
1
1
1
I
1
1
I
5
+
I
Figure A-9. BOARD
MAIN
MAIN Board) Component Layout
A-1 2
REV.-B
Figure A-10. BOARD
POWER SUPPLY
A-1 3
PSB BOARD) Component Layout
REV.-B
L
Figure A-1 1. BOARD
I
2002850 00
POWER SUPPLY
A-1 4
PSE Board) Component Layout
REV.-B
—
—
—
Figure A-1 2. BOARD ASSY., PANEL
PNL BOARD) Component Layout
A-1 5
Figure A-1 3.
Exploded Diagram
A-1 6
A-1 9
A
Ref. No.
100
101
102
103
104
106
107
108
109
110
111
112
113
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
Part
Table
Description
HOUSING
LOWER
SHIELD PLATE, BOTTOM
HOLDING PLATE, FFC
GROUNDING PLATE, l/F
COVER
PRINTER FRONT
FRAME
SHEET GUIDE
HOUSING
UPPER
PAPER GUIDE, FRONT
KNOB
HOUSING, FRONT
COVER, FRONT
EDGE GUIDE, FRONT
RUBBER FOOT
COVER, CONNECTOR, UPPER
GUIDE, l/F BOARD
SHEET, PANEL
KEY TOP, POWER SWITCH
SHIELD PLATE, MAIN BOARD
COVER, DIP SWITCH
GROUNDING PLATE ‘
SHIELD PLATE, RIGHT
LOGO PLATE
C. B.
C. SCREW
X 14)
C. B.(O) SCREW
HEXAGON NUT (M4)
C. B. B(C). SCREW
10)
C. B.
C. SCREW
10)
C. B. B(P). SCREW
12)
C. B. B(P). SCREW
X 25)
C.
6)
SCREW
6)
SOUND ABSORBER
BOARD
MAIN
BOARD
POWER SUPPLY
FUSE
C.B.S. SCREW
WIRE
POWER
POWER
POWER
POWER
POWER
POWER
WIRE
BOARD
CABLE VD3 1303SA-1 OA
CABLE (BS3 1303SA-SR)
CABLE (AS3 1303S1)
CABLE VDO0303SA-1 OA
CABLE ASSEMBLY
CABLE ASSEMBLY
PANEL
PRINTER MECHANISM
FRAME, MAIN, BASE
FRAME, MAIN, RIGHT
O
CAM, CLUTCH, TRACTOR
COMBINATION GEAR, 8.5, 30
SPUR GEAR, 40
Description
Ref. No.
.
507
508
509
510
511
512
513
514
515
520
521
522
523
524
525
526
527
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
COMPRESSION SPRING, 200
X 16)
PLAIN WASHER
SPUR GEAR, 40
FRAME, MAIN, LEFT
COMBINATION GEAR
SPUR GEAR, 13.2
RATCHET, RD
LEVER
RIBBON PLANET
MOTOR, PF
DETECTOR, HP
FRAME
CR, MOTOR
MOTOR, CR
BELT PULLEY
COVER
E
BALL BEARING
C. B.S.(O) SCREW
RETAINING RING
DETECTOR, RELEASE
CARRIAGE
HEAD LOCK LEVER SPRING
HEAD LOCK LEVER (LEFT)
HEAD LOCK LEVER (RIGHT)
GROUNDING PLATE, HEAD
DETECTOR,
REAR
DETECTOR,
FRONT
DETECTOR, PLATEN
PLATEN
BUSHING, 8
SPUR GEAR, 34
PLAIN WASHER 8X0.5 X 15
LEAF SPRING 8.2X0. 15X 15
RETAINING RING TYPE-C
TRACTOR
TRACTOR ASSEMBLY (LEFT)
TRACTOR ASSEMBLY (RIGHT)
FRAME, TRACTOR, LEFT
FRAME, TRACTOR, RIGHT
PAPER SUPPORT
TRACTOR GUIDE SHAFT
SHAFT, TRACTOR
LEVER, TR, FRAME
SPUR GEAR, 17
COMPRESSION SPRING, 150
RETAINING RING TYPE-E(6)
PAPER GUIDE
SHAFT, RELEASE
ROLLER
PF, DRIVE
LEVER
PF
PAPER GUIDE
SUPPORT
COMPRESSION SPRING, 1300
SPUR GEAR, 11.5
SPUR GEAR, 18
564
COVER, EJ
ROLLER
565
566
A-20
EJ
COVER, PLATEN, UPPER
REV.-A
Table A-14. Part No. Reference Table (Cont.)
Ref. No,
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
589
590
591
592
Ref. No,
Description
SPUR GEAR,
PAPER TENSION SPRING
RETAINING RING TYPE-E(5)
SHAFT, CR, GUIDE
LEVER, G, ADJUST
PULLEY, DRIVEN
BELT PULLEY FLANGE
SHAFT, DRIVEN, PULLEY
PLAIN WASHER 3.2 XO.5 X 7
CABLE, HEAD, FRONT
CABLE, HEAD, REAR
GROUNDING PLATE, CR
RIBBON MASK
LEVER, RELEASE
SHAFT, RELEASE, SUPPORT
TIMING BELT
OIL PAD
BUSH, PARALLEL, ADJUST
HOLDER, HEAD CABLE
EXTENSION SPRING, 778
EXTENSION SPRING, 32
COVER, PLATEN, LOWER
COVER,
C. B.
C. B.
SCREW (M3 X 10)
C. SCREW (M3x 10)
A-2
Description
A.5 CASE OUTLINE DRAWING
u“
I
J
b
1368 m m
151 m
Figure A-1 7.
Case Outline Drawing
A-22
4
—------l
151 m
Figure A-1 8. LQ-107O Case Outline Drawing
A-23
EPSON
SEIKO EPSON CORPORATION
PRINTER DIVISION
EPSON OVERSEAS MARKETING LOCATIONS
EPSON AMERICA, INC.
20770 Madrona Avenue
Torrance CA 90503, U.S.A.
Phone: (2 13) 782-0770
Fax: (213) 782-5248
EPSON DEUTSCHLAND
6, 4000 Dusseldorf 11
Germany
Phone: (02 1 1) 56030
Fax: (21 1) 504-7787
EPSON UK LTD.
Campus 100, Maylands Ave,
Hempstead, Hertfordshire,
HP2 7EZ, U.K.
Phone: 0422-61144
Fax: 0422-227227
EPSON FRANCE S. A.
68 bis, rue
92300,
Levallois-Perret, France
Phone: (1) 47-373333
Fax: (1) 47-371510
EPSON AUSTRALIA PTY. LTD.
17 Rodborough Road,
Frenchs Forest, NSW 2086, Australia
Phone: (02) 452-0666
Fax: (02) 975-1409
EPSON SINGAPORE PTE. LTD.
No. 1 Raffles Place #26-00
Oub
Singapore 0104
Phone: 5330477
Fax: 5338119
EPSON HONG KONG LTD.
25/F, Harbour
25 Harbour Road, Wanchai,
Hong Kong
Phone: 5-8314600
Fax: 5-725792
EPSON ELECTRONICS TRADING LTD.
(TAIWAN BRANCH)
10F, No. 287 Nanking E. Road Sec. 3,
Taipei, Taiwan,
Phone: (02) 717-7360
Fax: 02-7129164
EPSON
V.
F. Iii
427
20099 SESTO S. GIOVANNI Ml, ITALY
Phone: 2-26233.1
Fax: 2-2440750
EPSON
De Roma, 18-26
08290-Cerdanyola del
Barcelona, Spain
Phone: (3) 582.15.00
Fax: (3) 582.15.55
SEIKO EPSON CORPORATION
Office)
80 Harashinden, Hirooka
Nagano-ken
399-07 Japan
Phone: (0263) 52-2552
Telex: 3342-214 (SEPSON J)
1991 Sept.
EPSON
Printed in Japan
91 .09-.5-G