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LX-810/850
TECHNICAL MANUAL
EPSON
NOTICE
" All rights reserved. Reprc~duction of any part of this manual in any from whatsoever without SEIKO EPSON's express written permission is forbidden. q 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. 9 Copyright 1989 by SEIKO EPSON CORPORATION Nagano, Japan
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REV.-A
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damage to equipment: DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by a DANGER headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER 1.
ALWAYS DISCONNECT THE F'RODUCT FROM BOTH THE POWER SOURCE AND THE H O S T C O M P U T E R BEFORE P E R F O R M I N G A N Y M A I N T E N A N C E O R R E P A I R PROCEDURE. 2. NO WORK SHOULD BE PERFC)RMED 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 EP'SON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. 4. IN ORDER TO PROTECT SENSITIVE /.LP CHIPS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS. 5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS RECOMMENDED BY THE MANUFACTURER; INTRODUCTION OF SECOND-SOURCE ICS OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.
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PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the LX-8 10/850. The instructions and procedures included herein are intended for the experienced repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: Chapter 1 Provides a general product overview, lists specifications, and illustrates the main components of the printer. Chapter 2 Chapter 3 Chapter 4 Describes the theory of printer operation. Discusses the options Includes a step-by-step guide for product disassembly, assembly, and adjustment. Chapter 5 Chapter 6 Provides Epson-approved techniques for troubleshooting. Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
q
The contents of this manual are subject to change without notice.
iv
REVISION TABLE
REVISION
I A IMar
DATE ISSUED
27, 1989
CHANGE DOCUMENT
I
I
1st issue
I
E
fy, -...,,.;
....
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REV.-A
TABLE OF CONTENTS
CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX GENERAL DESCRIPTION OPERATING PRINCIPLES OPTIONAL EQUIPMENTS DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT TROUBLESHOOTING MAINTENANCE
vi
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CHAPTER 1 GENERAL DESCRIPTION
1.1
1.2
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ..... .1-1. . . . SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .1-3. . . 1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 1.2.2 Firmware Specifications (ESC/P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1.3
1.4
INTERFACE OVER\fl EW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-12
DIP SWITCH AND JUMPER SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 1.4.1 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-15 1.4.2 Jumper Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.5
SELECTYPE FUNC1'ION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 SHEET LOADING AND SHEET EJECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 TEAR-OFF FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.6 1.7 1.8
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 1.8.1 1.8.2 1.8.3 1.8.4 1.8.5 ... Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18 Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Buzzer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 . Adjust Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 1-22
1.6
MAIN COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6.1 1.6.2 1.6.3 1.6.4 1.6.5
TAMA Boarld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23 . TAPNL-W Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 TA Filter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 . Printer Mechanism (M-3D1 O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
LIST OF FIGURES
Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 1-5. Figure 1-6. Figure 1-7. Figure 1-8. Exterior View of the LX-810/850 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 . Cut-Sheet Printing Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Printing Area for Continuous Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Roll Paper Printing Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-8 Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 . Self-Test Printout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18 Hexadecimal Dump Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
,-i :
REV.-A
Figure 1-9.
Lever Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 .
Figure 1-10. LX-810/850 Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Figure 1-11. TAMA Main Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 ... Figure 1-12. TAPNL-VV Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23. ... Figure 1-13. TA Filter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 . Figure 1-14. Model-3Dl O Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 .. Figure 1-15. Housing . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24
LIST OF TABLES
Table 1-1. Table 1-2. Table 1-3. Table 1-4. Table 1-5. Table 1-6. Table 1-7. Table 1-8. Table 1-9. interface Options ....................................................................m l-l Optional Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..1-1 Cut-Sheet Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .1-4 . Continuous Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 .. Roll Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 . Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-5 .. Label Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 printing Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 ... Character Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1o
Table 1-10. Column Width (maximum characters/line) . . . . . . . . . . . . . . . . . . . . 1-11 Table 1-11. Connector Pin Assignments and Signal Functions ..... 1-12 Table 1-12. Printer Select/Deselect Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 . Table 1-13. Settings for DIP Switch 1 (SW 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 Table 1-14. Settings for DIP Switch 2 (SW 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 Table 1-15. International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 Table 1-16. Lever Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 f:-? .
REV.-A
1.1
FEATURES
The LX-8 10/850 is a small, light-weight, low-cost, advanced paper handling printer comparable to the LX-800. Its main features are:
1. Advanced paper handling: Auto backout and cut sheet loading 2. Expanded ESC/P-code printing, implemented as a standard feature 3. Printing speeds:
200 cps (high speed draft) 1 5 0 CpS (dri~ft 10 cpi) 1 8 0 CpS (dri~ft 12 cpi)
4. Optional 8100 series interface 5. Clear, easy-to-read printing with a standard EPSON font 6. Two built-in NLQ (Near Letter Quality) fonts (Roman and Saris Serif) 7. Control panel switch selection of Draft, Roman, or Saris Serif font 8. Control panel switch selection of normal or condensed printing 9. Control panel mode settingd are saved in non-volatile memory
10.
Easy handling of cut sheets with the optional cut-sheet feeder (CSF)
The LX-8 10/850 is equipped with the standard EPSON 8-bit parallel interface. Various interface options enable users to print data from a variety of computers. Table 1-1 lists the interface options, Table 1-2 lists the optional units available for the LX-8 10/850, and Figure 1-1 shows an exterior view of the LX-8 10/850.
Tablo 1-1. Interface Options I Model Description
Enter faceboard
Model
Intelligent serial interface board
Intelligent IE:EE-488 interface board
NOTE: Refer to the "Optional Interface Technical Manual" for details.
Table 1-2. Optional Units
I
Pull tractor unit Roll paper holder
Description
Single bin cut sheet feeder
C8061 2* C80006"
8310 8750
Ribbon cartridge (Black)
1-1
REV.-A
Figure 1-1. Exterior View of the LX-81 0/850
,.
1-2
'
REV.-A
1.2 S P E C I F I C A T I O N S
This section describes LX-8 10/850 prinlter specifications.
1.2.1 Hardware Specifications
Printing Method Pin Configuration Serial, impact, dot matrix 9 wires (diameter 0.29mm)
#1 #2 #3
() ()
( )
t
! t
0.29mm
#4 < > #5 < > #6 #7 #8 #9
( )
0.35mm (1 /72")
f
Figure 1-2. Pin Configuration
Feeding Method Friction feed, tractor feed (push tractor: standard, pull tractor: optional)
When handling paper, note the following precautions described below
Friction Feed Precautions: 1. Do not use continuous paper. 2. Do not use a single sheet shorter than 182mm or longer than 3 6 4 m m .
3. Do not perform any reverse paper feed within 8.5mm from the top, or 22mm from the bottom. 4. Do not perform reverse feed greater than 1/6 inch after the paper end is detected. 5. Use the pull-out unit. 6. Do not use multi-part single sheet forms. Tractor Feed Precautions: 1. Release the friction feed mechanism. 2. Joining of copying paper must be by line or dotted pasting. 3. Copy paper must be a carbon-less, multi-part paper.
1-3
REV.-A a. Push Tractor Feed 1. Use the pull-out unit. 2. Do not perform reverse feeding greater than 1/6 inch. 3. After paper end detection, accuracy of paper feed cannot be assured and reverse feeding cannot be performed. b. Push Pull Feed 1. Remove the pull-out unit and attach the pull tractor unit. 2. Do not loosen the paper between the platen and pull tractor unit. 3. Adjust precisely the horizontal position of the pull and push tractor. 4. Do not perform reverse feeding greater than 1/6 inch. 5. Do not perform reverse feeding after the paper end is detected. c. Pull Tractor Feed 1. Remove the pull-out unit and attach the pull tractor unit. Line Spacing Paper Insertion Paper-Feed Speed 1/6 inch, 1/'8 inch, or programmable in units of 1/216 inch From rear Approximately 95 ins/line (1/6 inch line feeding) Approximately 75 ins/line (1/6 inch in page feed)
Paper Specifications See Table 1-3 through 1-6 Table 1-3. Cut-Sheet Specifications
Width Length Thickness 182 mm to 257 mm (7.15 in. to 10.1 in.) 182 mm to 364 mm (7.15 in. to 14.3 in.) 0.065 mm to 0.14 mm (0.0025 in. to 0.0055 in.) 14 lb. to 24 lb. (52.3 g/mz to 90 g/m2)
Si_k&lL
Width Copies Quality Total Thickness Weight Width Weight Quality Thickness
Table 1-4. Continuous Paper Specifications
101 mm to 254 mm (4.0 in. to 10.0 in.) 3 sheets (1 original and 2 copies) Plain paper 0.065 mm to 0.25 mm (0.0025 in. to 0.01 in.) 1 sheet - 14 lb. to 22 lb., (52.3 g/m2 to 82 g/m2) 3 sheets -- 12 lb. to 15 lb., (40 g/mz to 58.2 g/m2) each
Table 1-5. Roll Paper Specifications
216 mm & 3 mm (8.5 in. & 0.12 in.) 14 lb. to 17 lb. (45 kg to 55 kg) Plain paper 0.07 mm to C).09 mm (0.0028 in. to 0.0035 in.)
1-4
REV.-A
Table 1-6. Envelope Specifications
Size Quality Thickness No.6 (166 Imm x 0.16 mm to
92
mm), No. 10 (240 mm x 104 mm) mm (0.0063 in. to 0.0197 in.)
Bond paper, Plain paper, Air mail
0.52
Difference of thickness within printing area must be less than 0.25 rnm (0.0098 in.). Weight 12 lb. to 24 lb. (45 g/m2 to 91 g/m2)
NOTES: " . *
Envelope printing is only available at normal temperature. Keep the long side of the envelope horizontal at setting. Set the left of a No.6 envelope at the setting mark of the sheet guide.
Table 1-7. Label Specifications Size
Weight Thickness 2 1/2 in. X 15/16 in. (63.5 mm X 23.8 mm) 55Kg (68 g/m2) O.19 mm (0.0075 in.) max. Thickness excluding the base paper must be equal to or less than 0.12 mm (0.0075 in.).
NOTES: "
q
Label printing is only available at normal temperature. Labels must be a fanfold type. For printing labels on pressure sensitive paper, the following conditions must be met: (1) jointed by dotted or line pasting. (2) total thickness is equal to or less than 0.3mm (0.01 18 inch). (3) 5 degree C to 35 degree C and 10'%0 to 80'ZO RH.
q
1-5
REV.-A
Printing Area
p) . ..
The figures below show the printing area for cut sheets.
*1 )
4=
r
ABC
-
182-257 mm(7. 2-10.1 " )
* Printable area *1 )
8.5rnrY
0.33 " or mt "e --\ -- i P r
I n t a
XYZ 7
3../
,7 ""
b 364mm max. I 14.3 " max. ~
a
r e a
--
--
L
ABC --
- XYZ l -
q
1 ) At least 3.0 mm (O. 12 in.) when the paper width is less than 229 mm (9 in.); at least 24 mm (0.9 in.) when the paper width is 257 mm ( 10.1 in.) Printing is possible approx. 28 mm from the paper's detected bottom edge; the 13.5 mm value (0.87 in.) of either the top or bottom edge. ~.=
q
(lowest print position) is for reference only. Paper feed accuracy can not be assured within 22 mm ~
Figure 1 -:3. Cut-Sheet Printing Area
1-6
REV.-A
4.0 " -10.0 " ,101 mm-254mm
I
I
*1) 1A
Printable area 1
I *2)
Printable
area
o 0 0 0
o 0
0 0 0 0 0 )(YZ 0 0 0 0 - - - - - - - - - - - - - - - 00 0 0 0 XYZ 0 0 i 0 0 0 0 0 0
0
0 0
0
+
0
9mm,0.35 " or more
9mm,0.35 " or mqre
+
0 0 -0- - - - - - - - - - - - - - - - - - - - - - - - - - - 0 0 0 0 ABC 0
4ABC
t
4
Printable area
t
0 0 0 0 0 0 0
q 1) 13
mm or greater for paper widths of 101 - 242 mm (4 - 9.5. in.)
26 mm or greater for paper widths of 254 mm (10 in.) *2) 13 mm or greater for paper widths of 101 - 242 mm (4 -9.5 in.) 24 mm or greater for paper widths of 254 mm (1 O in.)
Figure 1-4. Printing Area for Continuous Paper
1-7
REV.-A
I 3rnm
2`1 6mm(8.5 ")* 3mm(0. 12 " )
min. 3 m m 2 0 3 . 2 m m
I
m i n .
`1
50m
m i n
(printable area)
I
--
T
1
I
AEIC
XYZ
60m
-- Figure 1-3. Roll Paper Printing Area
Ink Ribbon Type: Color: Reliability: Reliability Mean Cycles Between Failure (MCBF): Mean Time Between Failure (MTBF): Life of Printhead Safety Approval Safety Standards UL478 (U.S. version) CSA22.2 #;!20 (Canada version) VDE0806 (TIJV) (European version) Radio Frequency Interference (RFI) FCC class B (U.S. version) VDE 0871 (Self-certification)( EurOPean version) 200 million :;trokes\wire 4000 POH (2!5% duty) 8750 Ribbon Cartridge Black 3 million characters at 14 dots/character
3
million lines (excluding printhead)
, ,,: f..
",.
1-8
REV.-A Electrical Specifications 120 VAC & 10% (120V version) 2 2 0 / 2 4 0 VAC + 10% (220/240V v e r s i o n ) Frequency Range Power Consumption insulation Resistance Dielectric Strength 120V Version 220/240V Version Environmental Temperature Humidity Resistance to Shock Resistance to Vibration Conditions 5 to 35 degrees C (41 to 95 degrees F) -operating 30 to 60 degrees C (-22 to 149 degrees F) -storage 10 to 80 YO RH (no condensation) operating 5 to 85 % FIH (no condensation) -storage 1 G, within 1 mS -operating 2 G, within 1 mS -storage 0.25 G, 55 Hz max. -operating 0.50 G, 55 Hz max. -storage Physical Specifications Weight Dimensions 5.75 Kg 418 mm (Width) X 339 mm (Depth) X 141 mm(Height), excluding knobs and paper guides 49.5 to 60.!5 Hz 28W (Draft self-test) 10 Mgohms min. (Between AC Line and Chassis) (At 50 or 60 Hz, between the AC line and chassis) 1 KV AC (rmslminute) or 1250V AC (rms/second)
1.5KV AC (rms\l O minutes) or 1250V AC (rms\second)
Power Conditions
1-9
REV.-A 1.2.2 Firmware Specifications (ESC/P) Control Code Printing Direction Input data buffer Character Set ESWPTM level ESC/P-81 (EPSON Standard Code for Printers) Bi-directional Uni-directional 4 K bytes 96 ASCII characters 96 Italic characters 32 International characters (13 countries) 32 International Italic characters 96 IBM Graphics characters Font EPSON NLQ Roman EPSON NLQ Saris Serif EPSON Draft Printing Speed See Table 1.8 printing with logic seeking (text) (left to right) printing (Bit-image)
,,. :., {/-.
Table 1-8. Printing Speed
Type of Letters High Speed Draft Pica Elite Double-Width Emphasized Double-Width Emphasizecl Condensed Double-Width condensed Double-Width Elite Print Speed [cps) 200 150 180 75 75 37 128 64
Condensed Elite NLQ Pica NLQ Elite
90 150 25 30
Dot-matrix Format Character Size
9 X $J Text mode (Draft) 18 X 20 Text mode (NLQ) See Table 1-9
Table 1-9. Character Size
Type of Letters Pica Elite Condensed Double-Width Pica Double-Width Elite Double-Width Condensed Condensed Elite Emphasized Double-Width Emphasized Super/Subscript Width ( m m ) 2.1 1.7 1.05 4.2 3.4 2.1 0.85 2.1 4.2 Depends On Pitch Height (mm) 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 1.6
1-10
REV.-A Printing Columns Table See Table 1-10
1-10. Column Width (maximum characters/line)
Column Width (CPL) 80 96 137 40 40 48 68 160 80 Column/inch (cpi) 10 12 17 5 5 6 8.5 20 10
Type of Letters Pica Elite Condensed Double-Width Pica Double-Width emphasized Double-Width Elite Double-Width Condensed (Condensed Elite Emphasized
I
1-11
REV.-A
1.3 INTERFACE OVERVIEW
The standard 8-bit parallel interface provided with this printer meets the specifications described below. Data Format Synchronization Handshaking Signal Level Adaptable Connector 8-bit parallel By STROBE pulse By BUSY and ACKNLG signal TTL-compatible 57-30360 (amphanol) or equivalent
Data Transmission Timing See Figure 1-6
BUSY { ACKNLG DATA STROBE o.5#s min.
A ,/,,
,/[ .
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. 1 Signal Name STRORE Return Pin No. 19 DIR In Functional Description
Strobe pulse to read the input data. Pulse width must be more than 0.5,us. Input data is latched at falling edge of this signal.
2
DATA 1
20
3 4 5 6 7 8 9 10
DATA 2 DATA 3 DATA 4 DATA 5 DATA 6 DATA 7 DATA 8 ACKNLG
21 22 23 24 25 26 27 28
In [n In In In In In In out
Parallel input data to the printer. "HIGH" level means data " 1". "LOW" level means data "O".
This pulse indicates data is received and ready to accept next data. Pulse width is 121.M approx. "HIGH" indecates printer cannot accept next data. "HIGH" indicates paper-out. This signal is effective only when ERROR signal is "LOW". Always "HIGH" output. (Pulled up to +5V through 3.3kohms register.)
11 12
BUSY PE
29 30
out out
13
SLCT
--
out
1-12
REV.-A Table 1-11. Connector Pin Assignments and Signal Functions (Cont.) Pin No. 14 Signal Name AUTOFEED-XT Return Pin No. -- DIR In Functional Description if "LOW" when the printer is initialized, a line feed is automatically performed by input of "CR" code. (Auto LF)
Not used GND Chassis GND -- -- Ground for twisted-pair grounding Chassis ground level of printer Not used GND
I NIT ERROR 16 In out Grounds for twisted-pair grounding Pulse (Width: 50#s min., active "LOW") input for printer initialization. "LOW" indicates some error is occurred in the printer. Ground for twisted-pair grounding Not used
15 16 17 18 9 to 3 0
31 32 33 34
GND
--
--
--
--
35
--
out
Always "HIGH". (Pulled up to +5V through 3.3 Kohms register.) If "LOW" when prinater is initialized, the DC1/DC3 control is disabled.
36
SLCT-IN
--
In
NOTES: 1. "DIR" refers to the direction of the signal flow as viewed from the printer. 2. "Return" 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 0.2 us. 5. The AUTO FEED-XT signal c:an be set LOW by DIP switch 2-4. 6. The SELECT-IN signal can ble set LOW by jumper 1. 7. Printing tests, including interface circuit tests, can be performed without using external equipment by setting DATA 1-8 of the interface connector to certain codes and connecting the ACKNLG signal to the STROBE signal.
1-13
REV.-A T a b l e 1 - 1 2 s h o w s P r i n t e r S e l e c t / D e s e l e c t (DC l/DC3) controL including relations amon9 ON-LINE, c! . .
SELECT-IN input, DC l/DC3 and interface signals. Table 1-12. Printer Select/Deselect Control
ON-LINE SW
SLCT-IN HIGH/LOW
HIGH
Dcl/Dc3 DC l/DC3
DC 1
ERROR LOW
HIGH
BUSY HIGH
LOW/HIGH (During data entry) LOW/HIGH (During data entry) LOW/HIGH (During data entry) LOW/HIGH (During data entry)
ACKNLG No pulse
Pulse output after entry Pulse output after entry Pulse output after entry
DATA ENTRY Disable
Enable(Normal Process) Enable (Waits DC 1. See Note 2)
OFF-LINE ON-LINE
DC3
HIGH
LOW
DC 1
HIGH
Enable (NorPulse output after entry mal process)
DC3
HIGH
NOTES: 1. In Table 1-12, it is assumed that no ERROR status exists other than that attributable to the
OFF-LINE mode. 2, Once the printer has been put in the deselected state by the DC3 code, the printer will not revert to the selected state unless the DC 1 code is input again. (In the deselected state, the printer ignores input data until the DC 1 code is received.) 3. The DC 1 and DC3 codes are enabled only when the SLCT-IN signal (Input Connector No.36 for the parallel interface unit) is HIGH and printer power is initialized. 4. if the SLCT-IN signal is LOW when the printer is initialized, DC1/DC3 printer select/deselect control is invalidated, and these control codes are ignored. 5. If the SLCT-IN signal is HIGH and is not set to LOW by jumper 1 when the printer is initialized, the printer starts from the selected (DC 1 ) state.
1-14
1.4 DIP SWITCH AND JUNIPER SETTINGS
This section describes DIP switch settings for the LX-8 10/850 printer.
1.4.1 DIP Switch Settings
The two DIP switches are located on the side of the printer and function as shown in Tables 1-13 through 1-15. Note that the status of the DIP switc:hes is read only at power on or upon receipt of the I NIT signal.
Table 1-13. Settings for D!P Switch 1 (SW1)
No.
1 I Character Pitch
Description
ON
OFF I 10 cpi 0 Italics I
Fectory Setting OFF OFF OFF
I
I
12 cpi
0 Graphics Invalid
2 3
Shape of Zero Table Selection (note)
E ` ` "gh
Normal See Table 1-15 No. 1 2
3 4
4 I Tear Off
I
Valid
I
OFF
:'
Factory Setting OFF
OFF OFF
When the DIP switch is set for the Italic table, at power on printer defaults to ESC 7 table. When the switch is set for the Graphic table, at power on it defaults to ESC 6 table.
Table 1-14. Settings for DIP Switch 2 (SW2)
Description Page length Cut-Sheet Feeder (CSF) Mode
l-inch skip AUTO FEED XT Signal Internally Fixed or ~t
.-
ON 12
in.
OFF
11 in.
On
On Fixed to LOW
off off
Depends On External Signal
OFF
Table 1-15. International Character Set Selection
1-6 On 1-7 I On I 1-8 On Country U.S.A 1-6 Off 1-7 ] On I 1-8 On Country Denmark 1
1.4.2 Jumper Setting Jumper 1 (user-selectable) is located on the TAMA board. If the jumper is connected, the SLCT-IN signal is fixed to LOW, and DC 1 /DC3 printer select control is ignored.
1-15
REV.-A
1.5
SELECTYPE F U N C T I O N
SelecType allows the user to choose fonts and the printing mode easily. This function provides for
selection of Draft, Roman, or Saris Serif fonts and selection of normal printing or condensed printing
modes. SelecType is effective only when the printer is ON LINE and not printing. To select Roman or Saris Serif, press the NLQ button. A buzzer sounds when the NLQ button is pressed. When it sounds twice, the Roman font is selected. When it sounds three times, the Saris Serif font is selected. To select the Draft font, press the DRAFT button. The buzzer will sound once, indicating that the DRAFT font is selected. To set for condensed printing when the printer is in the print mode, press the CONDENSED button once (the buzzer will sound once), and the printer will enter the condensed print mode. T O cancel condensed printing, press the CONDENSED button again. After YOU press the button, the ,. ~ ,. `g,,, buzzer sounds twice to tell you that condensed printing is cancelled.
1.6 SHEET LOADING AND SHEET EJECTION
The release lever enables disengaging of the push tractor unit drive mechanism. The printer therefore provides some improved paper-handling functions through combination of the release-lever and LOAD/EJECT control panel switch.
Cut Sheet Loading And Ejection To load a sheet of paper, position the paper release lever back, place the sheet along the paper guide, and press the LOAD/EJECT switch. This loads the paper to the top-of-form position. Pressing the LOAD/EJECT switch after the paper has been loaded will cause the paper to be ejected. Continuous Paper Loading And Ejection (Back-out) To load fanfold paper, move the paper release Iever forward, and insert the paper into the push tractor. Pressing the LOAD/EJECT switch will then cause paper to be automatically loaded to the top-of-form position. Pressing the LOAD/EJECT switch after the fanfold paper has been loaded will cause the printer to eject the paper backward from the push tractor. To back out several pages, press the LOAD/EJECT switch several times (reverse feed is performed on a page-by-page basis). The ON-LINE LED
will
~:, L. .,.
flash only when the paper is loaded and the ON-LINE switch pressed. This indicates
that the printer has entered "Top-of-form adjust" mode, and that the user may adjust the top-of-form position, as well as the loading positions for subsequent forms. Adjustment is made using the FORM FEED button, which will increment the paper forward, and the LINE FEED switch, which will increment the paper in reverse. (The minimum feed amount is 2/216 inch). When cut sheet is used, the adjusted Top-of-form position will be lost when the printer is re-initialized, and the Top-of from will be reset to the default value. When continuous paper is used, however, the memory of the adjusted Top-of-form position will be retained even after printer initialization.
1-16
REV.-A
1.7 T E A R - O F F FUNCTION
The Tear-Off function can be enabled by making the appropriate DIP switch setting, and will operate when the release-lever is set to the tractor position. In such a case, if the input data buffer is empty and the printer is ON-LINIE, the paper will automatically be fed to the tear-off position, and the ON-LINE LED will flash to indicate that the FORM FEED and LINE FEED switches are now available to perform micro-adjustment. The user may then adjust the paper to the tear-off position. This position becomes the new tear-off position default, and will remain valid even if the printer is reset and reinitialized, and regardless of whether the main power has been interrupted. When new data are input to the printer, the paper will automatically be returned to its original position, and printing will then start. Paper having been advanced to the tear-off position will also be returned to its original position if the ON-LINE switch is pressed (switching the printer from ON-LINE to OFF-LINE).
1-17
REV.-A
1.8 OPERATING
buzzer operation. 1.8.1 Self-Test
INSTRUCTIONS
functions, error states, printer initialization, and
This section describes the self-test, hexadecimal d u m p
To begin printing the self-test in the Draft mode, turn the printer ON while pressing the LIN E-FEED button. To begin printing the self-test using the hlLQ mode (Near Letter Quality), press FORM FEED and hold it down, then turn the printer power ON. Self-test printing can be stopped or started by pressing ON-LINE (ON-LINE indicator is not lit). To finish the self-test, stop the printing by pressing the ON-LINE switch then turn OFF the printer power. The firmware revision number is printed as the first line of the self-test, and subsequently, current DIP switch settings are printed.
Xxxxxxxx
10 CPI Spacing 1-1 OFF Shape of Zero O (Unalashed ) 1-2 OFF CG Table Italics 1-3 oFF Short Tear-off Valid 1-4 oFF Draft Print Speed High 1-5 oFF Country U.S.A. 1-6 ON 1-7 ON 1-6 ON Page Length 11 inch 2-1 OFF CSF Mode Invalid 2-2 OFF Skip Perforation None 2-3 OFF Auto LF Depend on I/F 2-4 OFF ! "U$%&" ( )*+, -. /0123456789: ; <=>%ABCDEFGHIJKIMNOPQRSTUVWKY Z[\l `' abcdefshijklmno ! "FF$.%&" ( )*+, -. /0123456769: ; <=>?@ABCDEFGHIJKLMNOPQRSTUVWX YZ[\l `-' abcdefghijklmnop "'P$%&" ( )*+, -. /01234567.99: ; <=>?@ABCDEFGHIJKMINOPQRSTTJVWX YZ[\l`"abcdefgbijklmopq #$%&" ( )*+, - ./0123456769: ; <=>?3ABCDEFOHIJKLMNOPQRS3'WJWX YZC\I `-=abcdefg~ijklmmopqr $%&" ( )*+, -. /0123456769: ; <=>?6%W,CDEFGHIJKLMNOPQRSTUVWX YZ [\] abcdefghijklmnopqre %&' ( )*+, -. /0123456789: ; <=>?@ASCD8FGHI JKLMNoPQRSTUVWK YZ [ \ 1` abcdef ghij klmnopqrat &" ( ) *+, -./0 123456789: : <.>?@tABCDEFGHI JKLMNOPQRS'fUVWXYZ [ \ 1`. abcdefghld klmnopqratu . ( )*+, -. /0123456769, ; <=>?@ABCDEFGHIJKU4NOPQRSTUVWK YZ [\ ]:-yabcdef giij klmnopqratuv ( )%+, -. /0123456789: ; <=>?@ABCDEFGHIJK LMNOPQRSTUVW XY Z [\] `-" abcdefghi.lklmnopqratuvw )*+ ,-. /o12345678g : ; <=>?@ABCDEFGHIJKLMNOPQRSTOVWX YZ[\l `-" abcdef ghl.lklnmopqrstuvwx r+, -. /012345.5789: ; <=>?@ABCDEFOmlIJKLMNOPQRSTOVWX YZ 1 \ 1`_ abcdefghijklmnopqratuwxY + ,- ./0 123456769: ; <=>? QABCDEFGHIJKLMNOPQRSTUVWXY Z[\l " abcdefghijklmnopqretuvwxYz .-./0123456769: ;<=>?@ABCDEFGHIJKMOPQRSmXYZ[\l--`abcdefshijkl~0MrStU-YZ{ -./0123456769: ;<=>7@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\l `'abcdefghijklmnopqrstuvwxYz( : ./0123456789: :<=>?@ABCDEFGHIJK~OPQRSWXYZ[\l---abcdefghijklmonrstuwyz( ;} /0123456769: ;<=>?@ABCDEFGHIJKIJlNOPQRSTWWX YZ[\l-"abcdefghi$klmnopqretuvwxYz{ ~}0123458789: ;<=>?@ABCDEFGHIJKLKNOPQRSTUVWX YZr\l- `abcdefghi~klmnopmstuvwwz{ :}123456789: ;<.>?@ABCDEFGHIJKNNOPQRS~~YZ[i]:-=abcdefg~ij~lmopq~etuwyz{ :}- ! 23458789: ;<=>?IPABCDEFGHIJKLHN3PQRSTUVWX YZ[\]-'nbcdefghijklmnopqretuvwxyz{ ;?- !" 3456789: ;<=>?SIABCDEFGHIJKUINOPQRSTW!4K YZ[\]-_'abcdefghijklmnopqrstuvwxyz{ ;)- !"# 456769: ;<=>?@ABCDEFGHIJKU!NOP,WS TUVWXYZ[\]--'abcdefghijklmnopqretuvwxyz{ ;}- !"#$ 56789: ;<=>?@ABCDEFGHIJKLMNOPQRSTWVWX YZ[\l--abcdefghijklmnopqrotuwyz{ ;}- !"#S.% 6789: :<=>?@ABCDEFGHIJKLtlNOPQESTUVWX YZ[\l--'abcdef8hijklmnopqretuwxYz{ !}- !"#$Z4 769: ;<=>?@ABCDEFGHIJKLJlNOPQR31'UV!4K YZ[\l "'abcdefghijklumopqrntuvwxYz{ 1}- !"#SXd" 89: ;<=>?@ABcDEFGHIJKLrlNoPQRs17JVw'n Z[\l-'abcdefghijklmnopqratuvwxYz{ 1}- !"#$XA'( 9: ;<.>?@ABCDEFGHIJKLMNOPQRSTUWXYZ[\] "'abcdefghijklmnopqrstuvwxyz{ t}- !"#3Xd-() :;c.>?9ABCDEFGHIJKUlNOPQRSTUW4XYZ[\] `.abcdefghijklmnopqretuv'wxyz( ;}- {"#S=-()~ ;<=>?@ABCDEFGHIJKl14NOPQRSTtIVWXYZ[\] `. abcdefghijklmnopqratuvwxyz{ ;}- !"#SXA"f)*+ <=>?@ABCDKFGHIJK~NOpQRs~ YZ[\l--'abcdefghijklmnopqrstuvwxyz( :}- !"#$X&-()*+, =>?13ABCDEFGHIJKLM?40PQRS TUTWXYZ[\l --'abcdefghijklmnopqratuvwxyz{ :}- !"#$Xd"()*+,>?@ABCDEFGHIJKLJ4NOpQRSTUVWXYZ[\] `-. abcdefghijklmnopqretuvwxyz{ 1}- !"#$%&"()*+,-. ?@ABCDEFGHIJKLllNOPQRSTUVWKY Z[\]"-'abcdefghijklmnopqrstuvwxyz( ~}- !"#$xA"()*+,-./ @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\] "-. abcdefghijklmnopqretu..'wxyz{ ;}- ?"#$x&'()*+,-./O ABCDEFGHIJKLMNOPQRSTUVWX YZ[\]"-' abcdefghijklmnopqretuwyz( 1}- !-S$Xd-()*+.-./Ol BCDEFGHIJKLMNOPQRSTUVWXYZ[\l `-. abcdefghijklmnopqrstuvwxyz{ !}- !"#s%&"OX+,-./Oli? CDEFGHIJKLMNOPQRSTUVWX YZ[\l--'abcdefghijklmnopqratuvwxyz( ;}- .I''#$XA "()*+,-./Ol23 DEFGHIJKL4fNOPQRSTW.WKY Z[\l--'abcdefghijklmnopqrstuvwxyz( ;}- !"#$X&-()*+,- ./OlZ34 EFGHIJKLtiNOPQRS'fU%?4X YZ[\l "'abcdeft!hi3klmnowr8tuvwxyz{ !)- ?"#sx&-OX+.-. /O12345 FGHIJKMINOFQFiSTWWXY Z[ OPQRSTUVWX YZ[\l-'abcdefghijklmnopqr6tu%wxyz{ ;}- ! ,,#$x&.OX+,- ./OIZ3456789:;<=>? PQRSTUVWKYZ[\l -_"abcdefghijklmmopqrotuvwxyz{ ;}- !"#$X&-()*+, -./O123456789: ;<=>?@ QRSTUVWXYZ[\l --'abcdefghijklmnopqrstuvwxyz{ 1}- !"#$Xd'()*+, -./Ol23456789: ;<=>?.9A RSTUVWXYZ[\l --'abcdefahlklmnocarstuwxyz(z( !?- !'"#s.&4"()*+. -./Ol23456789: :<=>?@AB STUVWXYZ[il:-=abcdefgiiijklmno:a;stuvwxy;{ ~i; !"#ti'()*+,~ .>01234567, 9: ;<=>WABC TUVWXYZ[\l --'abcdefghijklmnopZrstuvwxyz{ ;}- !"#w&"()*+,- ./Ol2345678: : ; <=> IWABCD WWXYZ[\l "_'abcdefghijklmnonratuvwxyz{ 1}- !-X$X& -()*+. -./OlZ3456789 ; <=>?W4ECDE VWXYZ[\]-'abcdefghijklmnoaratuvwxyz(z( ;}- !"#$X&o (]Jr+,- ./o1234567sg: <=>?WBC7DEF
Character
i&,""
Figure l-7. Self-Test Printout
1-18
REV.-A
1.8.2 Hexadecimal Dump Function
The printer enters the HEX-DUMP mode when it is powered on while the LINE-FEED and FORM-FEED buttons are pressed down. In the HEX-DUMP mode, the hexadecimal representation of the input data is printed out, along with corresponding ASCII characters. This function is valuable for checking the data the printer has received from the host. If input data is a control code rather than a character code, a period (.) is printed in the ASCII column. r),<{ ,:! r?,..,.<),,:, !"IC.,,IC:,
,,($,, , IL ",'.: ,.. I/J. .,1"1 Clllal,''rr:.rv 1, .
, ,,,,,,, ,., ..,
" . .
(:;
<::~ f:i.c
fYI,r 1,1..IIw r [:m.t.. :1. ,, A SIH:::E!:'I I...(]fi
D I IN!:< {+141) !Wlx r' K..
JE[:: 1':l,
(.)11 ,...
:1. .,7
`11::.AI,V [.) F'1," l',
1.11.1!:: ! :1'
Al .I'blr; `1' bl!';'l'F:ll [::'1'T1') 1.1%, ,. 1. ,,0,,
!.,,, . , ,, L;,,.1 1', !':1.,, ?.(:,, .1:,>$ t
i. j.
20
61)
.'!(: 61. m `7.! . [ . 20 6(:: . fd /,[:: 6:? fi:j ;'?() 4(:) <,:1 41:,'
f,i::
;., O
m
6:1.
`7:;
:!()
`7:!
(,2
61.
`;?:$ 61.;
Figure 1-8. Hexadecimal Dump Function
1-19
REV.-A
1.8.3 Buzzer Operation
The buzzer sounds under the following conditions: BEL code: Carriage trouble: Paper-out: Abnormal voltage: Incorrect RAM: The buzzer sounds for 0.1 second when a BEL code is input. Beeps 6 times, pausing briefly after 3rd beep. Beeps 20 times, pausing briefly after every 4 beeps. Beeps 5 times, pausing after every beep. (SRAM) Beeps 8 times, pausing briefly after every 2 beeps. (Inside CPU)
Beeps indefinitely until power OFF.
Recognition of panel operation: Beeps 1 or 2 or 3 times in setting print mode. Factory setting: Beeps once when the value under micro-adjusting is equal to the factory-set value. Sheet ejection failure (in CSF mode): Beeps 20 times, pausing briefly after every 4 beeps. Illegal paper releaselunrelease: Beeps continuously when the paper release lever is changed when the paper is in the paper path. Beeps until the lever is changed again or the paper is completely out of the path. .- .* $,".
1-20
REV.-A
1.8.4 Printer Initialization
The printer is initialized when: 1 ) AC power is turned on 2) The INIT signal is input Here is a brief summary of the initialization sequence. a) Return the printhead to the Ieftmclst position. b) Set ON LINE mode. c) Clear the print buffer and input buffer. d) Set the line spacing to 1/6 inches. e) Set the page length to 11 or 12 inches according to the DIP switch setting. f) Clear all vertical tab positions. 9) Set the horizontal tab position at 13-column intervals. h) Set the print mode according to tlhe DIP switch setting and the non-volatile memory setting of the control panel.
1.8.5 Adjust Lever Operation
The adjust lever must be set to the proper position according to the paper of paper you are using. Refer to Table 1-16 and Figure 1-9 below.
Table 1-16. Lever Position Lever Position 2nd step
3rd step 4th step 4th to 7th step
q
Paper
Cut sheet, continuous paper (non copy, 1 + 1 copy) Continuous paper (1 +2 copies) Label Envelope
If printing density becomes Ii!ghter, set the adjust lever position one step narrower.
2'ndl position
FL
o f;'-' )} t, /` II
pi,
u I <.41 I I l.. ""~ ~" l'.$..;/'
m
o
/
4'th position
~Adjust Lever
I
7
Figure 1-9. Lever Position
1-21
REV.-A
1.6 M A I N C O M P O N E N T S
The main components of the LX-8 10/850 printer are designed for easy removal and replacement to maintain/repair the printer.
The main components are: 1 ) TAMA board: Main control board. The CPU on this board controls all main functions. 2) TAPNL-W control panel: Control panel. 3) TA filter unit: Transformer and filter board. 4) M-3D 10: Printer mechanism.
MA board
... t..
TA
Filter Unit
--
Printer Mechanis M-3D 10
Figure 1-10. 1.X-81 0/850 Component Layout
1-22
REV.-A
1.6.1 TAMA Board
The use of the ~PD78 10HG CPU simplifies the main control board circuit design.
. PROM (3C)
-SRAM (3D)
Gate Array E05430 (3B)
- CPU LPD78 10HG (2C)
Figure 1-II 1. TAMA Main Control Board
1.6.2 TAPNL-W Control Panel
The TAPNL-W control panel is the LX-8 10/850 control panel which contains the indicator LEDs and switches.
Figure 1-12. TAPNL-W Control Panel
1-23
REV.-A
1.6.3 TA Filter Unit The TA filter unit contains a power cord ( 120V Version) or AC inlet (220/240V Version), power switch
fuse, filter circuit, and power transformer.
(120V Version)
(220V Version)
(240V Version)
Figure 1-13. TA Filter Unit 1.6.4 Printer Mechanism (M-3D1O) The M-3D 10 printer mechanism was developed specifically for the LX-8 10/850 printer. Its components
include: Carriage motor Carriage mechanism Paper feed motor Paper feed mechanism Ribbon feed mechanism Printhead Sensors
Figure 1-14. Nlodel-3Dl O Printer Mechanism 1-24
-.
REV.-A
1.6.5 Housing
The LX-8 10/850 housing consists of the upper and lower cases. The upper case houses the control panel. The lower case houses the printer mechanism and the main control board.
f:igure 1-15. Housing
1-25
REV.-A
CHAPTER 2 PRINCIPLES OF OPERATION
2.1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.1 Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.2 Outline of Printer Mechanism Operation . . . . . . . . . . . . . . . . . . . . . . 2-3 2.1.2.1 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.2.2 Mc~tors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-7
2.1.2.3 Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 2.1.3 Circuit Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2.2
... .. P R I N C I P L E S O F O P E R A T I O .N. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.2.1 Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.2.1.1 TA Filter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-11 2.2.1.2 + 12V DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . 2-12 2.2.1.3 +2!4V DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . 2-13 2.2.1.4 +5A/ DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . 2-19 2.2.2 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
. 2.2.2.1 Power-on Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20 . 2.2.2.2 Operation at Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 2.2.2.3 Power-off Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 . 2.2.3 Carriage Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22 2.2.3.1 Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 2.2.3.2 Carriage Motor Specification . . . . . . . . . . . . . . . . . . . . . . . . . .2-22 2.2.3.3 Carriage Motor Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 2.2.3.4 Carriage Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24 2.2.3.5 Carriage Motor Software Control ................. 2-32 . 2.2.4 Paper Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-35 2.2.4.1 Paper Feed Mechanism Operation ................ 2-35 2.2.4.2 Paper-Feed Motor Specifications ................... 2-36 2.2.4.3 Paper-Feed Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . 2-37 2.2.4.4 Paper-Feed Motor Software Control ............. 2-38 2.2.5 Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39
2.2.5.1 Printhead Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39 2.2.5.2 Printhead Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39 2.2.5.3 Printhead Drive Circuit Block Diagram ....... 2-40 2.2.5.4 Gate Array E05A30 Operation in Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
2-i
REV.-A
2.2.5.5 Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41 2.2.5.6 Printhead Software Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42 2.2.6 Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 2.2.7 EEPROM Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .2-45 2.2.8 Ribbon-Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46
LIST OF FIGURES
Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 2-5. Figure 2-6. Figure 2-7. Figure 2-8. Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Printer Mechi~nisrn Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Paper-End Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Paper-End Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-4 .. Home-Position Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5 . 2-5 Home-Position Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Release Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Release Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2-6. .. .... Figure 2-9. Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Figure 2-10. TAMA Board Block Diagram Figure 2-11. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Figure 2-12. Transformer Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 Figure 2-13. + 12V DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Figure 2-14. +24V DC Power SupPly Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Figure 2-15. Rectifier and Smoothing Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Figure 2-16. +24DC Switching Regulator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-17. Voltage Feedback Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-18. Over-Current Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-19. Output Transistor Drvie Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2-15 2-16 2-17 p ,, .., ,.,
Figure 2-20. Chopping Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18 Figure 2-21. +5V DC Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 Figure 2-22. Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 Figure 2-23. RESET Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .2-20 Figure 2-24. Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 Figure 2-25. Carriage Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 Figure 2-26. Carriage Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 Figure 2-27. SLA 7020M Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 Figure 2-28. Phase Data Input Circuit (2-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26 Figure 2-29. Phase Signal Timing Chart (2-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . 2-26 Figure 2-30. Phase Data Input Circuit (l-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27 Figure 2-31. Phase Signal Timing Chart (l-2 Phase) . . . . . . . . . . . . . . . . . . . . . . . . . 2-27 Figure 2-32. Reference Voltage Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 Figure 2-33. Constant Current Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29 Figure 2-34. Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30 Figure 2-35. Carriage Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Z.ii
REV.-A Figure 2-36. Home-PositionSeak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33 Figure 2-37. Printing Area and Printing Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34 Figure 2-38. Friction-Feed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35 Figure 2-39. Push Tractor Feed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-36 Figure 2-40. Paper-Feed Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-37 Figure 2-41. Paper-Feed Motor Drive Timing Chart . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38 Figure 2-42. Printhead Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39 Figure 2-43. Printhead Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 Figure 2-44. Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-47 . Figure 2-45. Printhead Driving Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41 . Figure 2-46. Print Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-42 Figure 2-47. A/D Converter (+24V VDC Line Monitor) Circuit ..... 2-42 Figure 2-48. Relationship between Head Driver Voltage and Print Driving Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43 Figure 2-49. Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 Figure 2-50. EEPROM Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45 . Figure 2-51. Ribbon-Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-46
LIST OF TABLES
Table 2-1. Board Connecl:or Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Table 2-2. Voltage Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 .. Table 2-3. Reference Voll:age . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 Table 2-4. Phase-Excitation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 Table 2-5. Drive Sequence (2-2 Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 Table 2-6. Drive Sequence (l-2 Excitation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 Table 2-7. Excitation Sequence (Clockwise : Paper Feeds . Forward) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38 Table 2-8. Ribbon-Feed Gear Train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2-46
Z.iii
REV.-A
2.1 O V E R V I E W
This chapter describes the signals at the connectors linking the primary components of the LX-8 10/850. These components include the printer mechanism and control circuits. The chapter also describes the operation of the printer's circuitry and /printer mechanism.
2.1.1 Connector Summary
The interconnection of the primary components is illustrated in Figure 2-1. Table 2-1 summarizes the functions, sizes, and types of the connectors shown in the figure.
Table 2-'1. Board Connector Summary Board Connector CN 1 CN2 CN3 CN4 CN5
TAMA Board CN6 CN7 CN8 CN9 CN 10
Function
Host l/F (Parallel) Optional I/F Board Control Panel Release Lever CR Motor and PF Motor PE Signal Home Position Signal Head AC Power Input DC Power Input (OEM)
:
Pins
36 26
Reference Table
1-11 A-8 A-9 A-1 O A-1 1 A-12 A-13 A-1 4 A-15 A-16
10
2 12 2 2 12 4 4
2-1
REV.-A
FiiEElr
Board
Control Panel 1 OPin
Model 3D 10 Printer Mechanism
CR motor
PF motor PE HOME
Release
--
HEAd
,
2Pin
12Pin
2Pin
II
I
TAMA Board
c m ,zn
c E : 5 .5 co
: 5
co
": n
ii~ -u n
36 Pin m
L
TA
(OEM) I I I
Power Input I I
L'
,.
"'?
Filter Unit I
rn Transformer / \ 1 I
J
.5 m L z - u
[ Optional l/F
Paralel l/F
)
`
l-l
Optional Interface
1
I
I
Board
I I I I
L
Filter Board
1 `
t:
I Parallel l/F j Specific l/F I
AC"IN
l----------~ ----------i
I
HOST COMPUTER I
~-.. ., .,. ,.
NOTE: CR = carriage.
PF = paper feed. HP = home position. PE = paper end.
Figure 2-1. Cable Connections
2-2
REV.-A 2.1.2 Outline of Printer Mechanism Operation The Model 3D 10 is a 9-pin serial dot matrix printer. Because the frame and many of the components
are of plastic, the mechanism is lightweight. A block diagram of the printer mechanism is shown in Figure 2-2. & z w f 5: :: : ~.: U m $ (0 A u --(> a
NE =0 0+ Ku v< ~~ u 1
~ 2': .$.: ~: $
CW = clockwise; CCW= counterclockwise. HP = home position; PE= paper end.
Figure 2-2. Printer Mechanism Block Diagram
2-3
REV.-A
2.1.2.1 Sensors
The printer mechanism is equipped with the following sensors: Paper-End (PE) Sensor Home-Position (HP) Sensor Friction/Tractor Sensor
Paper-End Sensor (PE sensor)
Figures 2-3 and 2-4 show the paper-end sensor. This sensor switch is ON when no paper is in place
(e.g., when the paper supply has run out).
"Paper-out" ~ ON ~ LOW Paper present ~ OFF + HIGH
~Jq~
Platen o / `"Paper-out"
Paper guide
".. . ~.
,-
Paper-End Sensor
c~
o /
"Paper present"
/
Paper
Figure 2-3. Paper-End Sensor Mechanism
+5V
&&.
R96
7A'
IK
Figure 2-4. Paper-End Sensor Circuit
2-4
REV.-A
Home-Position Sensor (HP sensor)
Figures 2-5 and 2-6 show the home-position sensor. The sensor switch is ON when the carriage is at the home position. Home position + ON -+ LOIA/ Other positions + OFF - HIGH This sensor determines the reference pcxsition for the carriage drive,
age guide shaft iage
Figure 2-5. Home-Position Sensor Mechanism
+5V
4
J
CN7-1
R97
IK
-
HOME
Figure 2-6. Home-Position Sensor Circuit
2-5
REV.-A
Friction/Tractor Sensor
The release sensor senses the position of the release lever in order to detect whether tractor feed or friction feed is in effect.
:$-2! +.
Release Lever Position : Front + F:riction Feed + OFF + HIGH level
Release Lever Position : Rear -+ Tractor Feed ~ ON ~ LOW level
Front Rear /
\
?"'"\ i,
ease Lever
~.
w < Friction/Tractor
Sensor
~ Figure 2-7'. Release Sensor Mechanism
+5V 4
r'
oJKL-=
R95 IK Figure :2-8. Release Sensor Circuit
2-6
REV.-A
2.1.2.2 Motors
This printer has the following motors: Carriage motor (step motor) Paper-feed motor (step motor)
Carriage Motor
The carriage motor is used to move the carriage right and left along the platen. This unit employs a 4-phase, 48-step motor using either 1-2
or 2-2 Phase excitation. An open-loop system is Used for control.
Paper-Feed Motor Paper feed is also driven by a 4-phase 48-step motor operating with 2-2 phase excitation. Each phase
switch causes the paper to advance by advanced 1/2 16" for each phase switch. The gate array controls the motor through an open loop.
2.1.2.3 Printhead Figure 2-9 shows the dot-wire operation.
When the head-driving coil is energizecl, the dot wire is pushed out. The dot wire strikes the ribbon, causing the ribbon to impact the paper, thereby printing a dot.
/Ribbon
Platen
Dot
`Core
Figure 2-9. Printhead
2-7
REV.-A 2.1.3 Circuit Overview
f. board circuitry.
,. h,
Figure 2-10 shows a block diagram of the TAMA
--7rmm
i PD78 10HG (2 c)
XWl
DATA/ADDRESS BUS (LOWER BYTE)
ADDRESS BUS (UPPER BYTEI
r h`3")'
PROM 32KB
RAM 8KB/32KB
(3C)
I
CONTROL PANEL
~Q= A[)DRESS ADDRESS ,LE DECODER LATCH I I GA E05A30 (36)
J
EEPROM (1 c) B
CONTROL PANEL LED DRIVE
+
24VDC +5VDC
+ 12vDC
t
t
t,
`Usir+km+=l
<-.,'.,
......
CG = character generator; GA = gate array. Figure 2-10. TAMA Board Circuit Block Diagram
The circuit consists mainly of the following ICS: ~PD7810HG CPU (2C)
q
The ~PD78 10HG executes the program in the PROM (3C) and controls all of the printer operations, Upon receiving the RESET signal, the CPIJ begins program execution from address OOOOH. P R O M (3C)
q
The PROM includes the control program (firmware) and character generators. " SRM 2064C (3D) The SRM 2064C SRAM is external melmory for the CPU. It is used as an input data buffer and line buffer for expanding data, and as working area for the program.
2-8
REV.-A E05A30 gate array (3B)
q
The E05A30 functions are as follows 1. Parallel l/F 2. Address decoder 3. Data address multiplexer 4. PF motor control 5. CR motor control 6. Control panel LED drive 7. Printhead drive control EEPROM (lC)
q
The EEPROM has a 256-bit memory, and remembers the current paper position. Other control circuits are as follows: ` Paper feed motor drive circuit The paper feed motor drive circuit drive:; the paper feed motor. The paper feed motor is a 4 phase-step motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching signal by the E05A30 gate array. Carriage motor drive circuit
q
The carriage motor drive circuit drives the carriage motor. The carriage motor is a 4 phase-step motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching signal by the E05A30 gate array. Power supply circuit
q
The circuit converts the AC power source to the DC voltages required by the unit. Specifically, the circuit converts the AC power to +24, +5, and + 12 V DC.
2-9
REV.-A 2.2
PRINCIPLES OF OPERATION
This section describes the operation of each component. 2.2.1 Power Supply Circuit The electrical power required by this mechanism is developed using the TA Filter Unit (which combines
a filter and a power transformer) and the TAMA board. The AC input passes first through the filter circuit,
where line noise is removed, and is then set to the transformer, where it is stepped down into two separate voltages: AC 26V and AC 12V. "The transformer output is sent to the power circuits on the TAMA board, which converts the power to the DC voltages (see below) required for operation. Table 2!-2. Voltage Applications
Voltage +5 v Logic circuit voltage
Purpose
Holding voltage for paper feed motor Others +24 V Carriage motor drive voltage Paper-feed motor drive voltage
Printhead drive voltage +12V Voltage for the optional l/F
A block diagram of the power supply circuit is shown in Figure 2-11. TA Filter Unit
I TAMA B o a r d * Step26VAC down Trans-- . I former
. w 12VAC I
Full-wave ~;jtifier
-- --
smo~thiflg
Circuit
~ +24 VDC +24 Regulator Circuit
I
I
I
~ +5 vDC +5 Regulator C i rc uit E +12 VDC
y-l
rectifier I ~n~oothing I Circuit I Figure 2-11. Power Supply Circuit Block Diagram
2-1o
REV.-A
2.2.1.1 TA Filter Unit
The filter board and the transformer are integrated into a single unit. This unit also incorporates the power switch and the inlet for the incolming AC cable. The incoming AC power passes first through the over-current protection fuse (F 1 ) and the power switch, and then into the filter circuit comprised of C 1, C2, C3, and L 1. This circuits removes AC line. The transformer steps down the incoming AC power into 26 VAC and 12 VAC outputs. To prevent overheating, a temperature fuse is incorporated into the transformer. Figure 2-12 illustrates the design of the! circuit. Power SW . o C2 --- L --
the noise on the
AC input line, and also serves to present noise generated within the printer from running through the
FI
CN1
red 26VAC LI C3
AC INPUT
-- -- a= cl
` blue 12VAC
F1 :
125V, 1.25A (120V Version) 250V, 0.63A (220V Version) 250V, 0.63A (240V Version)
Figure 2-12. Transformer Circuit
2-11
REV.-A
2.2.1.2 + 12V DC Power Supply Circuit:
As Figure 2-13 shows, a half-wave rectifying circuit is used to convert the incoming 12VAC voltage to + 12VDC. The 12V output is used only for the option l/F board (via the CN2 connector on the TAMA board). The TAMA board itself does not utilize this voltage.
,f\c12 e D3 E