Texas Instruments OMNi810 User manual

OMNi 800
electronic data terminals
MAINTENANCE MANUAL FOR
MODEL 810 PRINTER
MANUAL NO. 994386-9701 Rev. B
Revised 1 June 1978
TEXAS INSTRUMENTS
INCORPORATED

Copyright 1978 by Texas Instruments Incorporated
All Rights Reserved - Printed In USA
The information and/or drawings set forth in this document and all rights in and to
inventions disclosed herein and patents which might be granted thereon disclosing or
employing the materials, methods, techniques or apparatus described herein are the
exclusive property of Texas Instruments incorporated.
No copies of the information or drawings shall be made without the prior consent of
Texas Instruments Incorporated.
r----------------------.. INSERT LATEST CHANGED PAGES.DESTROY SUPERSEDED PAGES
LIST 0 F EFFE CT IV EPA GES INote: The portIon of the text affected by the changes is indicated by a vertical bar
In the outer margins of the page.
Maintenance Manual for Model 810 Printer
Manual No. 994386-9701
Original Issue: 15 July 1977
Revision
A: 15 March 1978 ECN 432918
T otdl nurnher of pages In this publication is 342 consisting of the following:
Page
Change
Page
Change
No. No.
No. No.
Cover 0
A-I-A-8 0
A 0 B-I-B-2 0
iii-xii 0
C-I-C-6
0
1-1-1-4 0
D-I-D-22 0
2-1--2-8 0
E-I-E-18 0
3-1-3-2
0
F-I-F-27
0
4-1-4-54 0 Index
-1- Index·8 0
5-1-5-25 0 User Response Sheet 0
6-1-6-134 0 Business Reply 0
7-1-7-37 0 Cover Blank 0
Cover 0
CHANGE NOTICES
I
Revision ECN
Page
No.
Letter
Date
Number Level
Description
A 3/15/78 432918 D Update drawings, add preventive
maintenance information
B 6/1/78
432332
D Correct errors; add Line Buffer Option Drawings and
Installation Instructions.
A
Change
No.

PREFACE
This manual provides operation, installation,'and maintenance information for the Model81 0 Printer
manufactured by Texas Instruments Incorporated. The manual is organized into the following
sections:
Section I - describes
the standard features of the Model 810 and lists specifications and available
options and accessories.
Section II -presents installation instructions, including unpacking, interface cabling,
and initial
preparation and testing.
Section III -provides descriptions of the control panels and indicators, operating instructions, self-
help procedures, interface
information, and software commands.
Section IV -explains principles
and theory of operation of the mechanism and electronics.
Section V - describes maintenance, including troubleshooting, assembly removal
and replacement,
and preventive maintenance.
Section VI -contains assembly drawings
and associated parts lists.
Section VII -presents logic diagrams
and electrical schematics.
iii

Various options available for the Model810 Printerare identified throughoutthis manualby a three-
letter configuration code. The options installed in your printer can be determined from the
configurationlabel
on theunderside of the access door. We suggestyoucopythis informationontothe
figure for ready reference to the user
of this manual. The code is defined in the table below.
CONFIGURATION
PRINTER
INTERFACE
CHARACTER
OPTION
SET
BSC
__
EIA
FUL __
UKF __
FLC __
TTY ___
UKL __ DNF __
VFC __
PLT
DNL __ SWF __
FCO __
LBE
SWL __ GRF __
VCO __
BRO __
GRL __
KAT __
DSC __
EXP __
KTS __
PROCESSOR IRC
___
OPTIONS
DNB __
NDE __
GDS __
NOTES:
DNB __
GED __
IRC __
LBP
LB __
DSC __
BRO __ GDS __
LBT
HDP __
BRO __
DSC __
GDS __
DEFINITIONS OF PRINTER CONFIGURATION CODE
BRa - Baud Rate Option
KAT -
Katakana & Full US ASCII
BSC -Basic KTS
Katakana plus Six Special Characters, Full
DNB - Data Terminal Not Busy US ASCII
DNF - Denmark/Norway Full ASCII LB Line
Buffer
DNL -
Denmark/Norway Limited ASCII LBE Line
Buffer bd, EIA IfF
DSC
Decode Carriage Return
LBP Line
Buffer bd, Par l/F
EIA
Serial Data
LBT Line Buffer
bd, TTY I/F
EXP
Expanded Domestic U.S. NDE -Non-Delete
Recognition
FCO
Forms Length & Compressed Print
PLT
Par Input TI-compatible
FLC
Forms Length Control
SWF
Sweden/Finland Full ASCII
FUL
Full ASCII Domestic U.S.
SWL
Sweden/Finland Ltd. ASCII
GDS
Gated Data Strobe
TTY
20 rnA Current Loop
GED -
Gated EIA Data
UKF -
United Kingdom Full ASCII
GRF -
Germany Full ASCII UKL -
United Kingdom Ltd. ASCII
GRL -
Germany Limited ASCII VCO -Vertical
Format Control and
HDP
Half Duplex Operation
Compressed Print
IRC
-Inverted/Reverse Channel
VFC -Vertical
Format Control
iv

TABLE OF CONTENTS
Paragraph Title Page
SECTION I. GENERAL DESCRIPTION
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
1.2 Description ............................................ 1-3
1.3 Configuration .... '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-3
1.4 Modification Features ..................................... 1-3
1.5 Optional Features ........................................ 1-4
1.6 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-4
SECTION II. INSTALLATION
2.1 Introduction ............................................ 2-1
2.2 Space Requirements ...................................... 2-1
2.3 Unpacking and Setting Up .................................. 2-1
2.4 Cabling and Grounding Information ............................ 2-2
2.4.1 Serial Interface Cable
.................................... 2-3
2.4.2 Parallel Interface Cable ................................... 2-5
2.4.3 TTY Interface Cable ..................................... 2-5
2.5 Initial Preparation ........................................ 2-6
2.5.1 Line Voltage Selection
................................... 2-6
2.5.2 Supplies Installation
.................................. 2-7/2-8
2.5.3 Operational Checkout
................................. 2-7/2-8
SECTION III. OPERATION AND INTERFACE INFORMATION
3.1 Introduction ............................................ 3-1
3.2 Control Panel Controls and Indicators .......................... 3-2
3.2.1
Paper Out Indicator .............................. '....... 3-2
3.2.2
Error Indicator ........................................ 3-2
3.2.3
On Line Switch and Indicator ............................... 3-2
3.2.4
Reset/Tab Switch ...................................... 3-3
3.2.5 Form Align ./Tab Set Switch ............................. 3-3
3.2.6 Form Align'" /Tab Clear Switch ........................... 3-3
3.2.7 Form Feed/Set ,Top of Form Switch .......................... 3-3
3.2.8 Line Feed/Line Feed Switch ............................... 3-3
3.2.9 Power Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-3
3.3 Auxiliary Control Panel Controls and Indicators ..................... 3-3
3.3.1
Normal/Test/YFC Switch (BSC,FLC,VFC,FCO,YCO) .............. 3-5
3.3.2 Pencil Switches (BSC,FLC,YFC,FCO,YCO) ..................... 3-5
3.3.3 8 LPI Switch and Indicator (BSC,FLC,VFC) ..................... 3-5
3.3.4 Form Length Rotary Switch (FLC,FCO) ....................... 3-5
v

Paragraph
3.3.5
3.3.6
3.3.7
3.3.8
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.4.9
3.4.10
3.4.11
3.4.12
3.4.13
3.4.14
3.4.15
3.4.16
3.4.17
3.4.18
3.4.19
3.5
3.6
3.6.1
3.6.2
3.6.3
3.6.3.1
3.6.3.2
3.7
3.7.1
3.7.2
3.8
3.8.1
3.8.2
3.9
3.9.1
3.9.2
3.9.3
3.9.4
3.9.5 .
3.9.6
3.9.7
TABLE OF CONTENTS (Continued)
Title
Page·
VFC Switch (VFC,VCO) .................................. 3-5
Store/Recall Switch (VFC,VCO)
.............................. 3-5
16.5 CPI/8 LPI Switch and Indicators (FCO,VCO) ................ 3-5
Elapsed Time Indicator (Optional) ............................ 3-6
Operating Procedures . . . . . . . . . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . .. 3-6
Ribbon Installation (All Printers) ............................ 3-6
Paper Loading (All Printers) ............................... 3-7
Turn-On Procedure (All Printers) ............................ 3-9
Top of Form Adjustment (All Printers) ....................... 3-10
Printhead Adjustment (All Printers) .......................... 3-11
Self-Test Diagnostic (All Printers) ............. 0 • • • • • • • • • • • •• 3-12
Lines Per Inch Spacing (All Printers) ......................... 3-12
Characters Per Inch Spacing (FCO, VCO) ..................... 3-13
Baud Rate/Parallel Input Selection (All Printers) ................. 3-13
Parity Selection (All Printers) .............................. 3-14
Automatic Line Feed Override (All Printers) .................... 3-14
Automatic Perforation Skip Override (All Printers) . . . . . . . . . . . . . . .. 3-14
Vertical Tab Setting (All Printers) ........................... 3-14
Vertical Tab Clearing (All Printers) .......................... 3-15
Fixed Form Length Selection (FCO, FLC) ..................... 3-15
Programming Form Length (FCO, FLC) ...................... 3-16
Storing Vertical Format (VFC, VFO) ......................... 3-16
Recalling Vertical Format (VFC, VFO) ....................... 3-17
Turn-Off Procedure (All Printers) ........................... 3-18
Self-Help Procedures ..................................... 3-18
Serial Interface ........................................ 0 3-19
Baud Rate .......................................... 3-20
Signal Levels and Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-20
Asynchronous Data Format ............................... 3-21
Timing ........................................... 3-21
Parity ............................................ 3-21
Parallel Interface (Optional) ................................ 3-21
Signal Levels and Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-23
Timing ............................................. 3-23
TTY Current Loop Interface (Optional) ......................... 3-23
Signal Levels and Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-23
Timing .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-25
Software (Remote Control) ................................. 3-25
Software Commands .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-25
Software Form Length Setting ............................. 3-25
Software Horizontal Tab Setting ............................ 3-29
Software Line Width Setting .............................. 3-29
Software Vertical Format Recall ......... -. . . . . . . . . . . . . . . . . .. 3-30
Software Vertical Format Store ............................ 3-30
Software Vertical Tab Setting 3-30
vi

Paragraph
4.1
4.2
4.2.1
4.2.1.1
4.2.1.2
4.2.1.3
4.2.1.4
4.2.1.5
4.2.2
4.2.3
4.2.4
4.2.4.1
4.2.4.2
4.2.5
4.2.6
4.2.7
4.3
4.3.1
4.3.2
4.3.2.1
4.3.2.2
4.3.2.3
4.3.2.4
4.3.2.5
4.3.3
4.3.3.1
4.3.3.2
4.3.3.3
4.3.4
4.3.4.1
4.3.4.2
4.3.4.3
4.3.4.4
4.3.4.5
4.3.4.6
4.3.4.7
4.3.4.8
4.3.5
4.3.5.1
4.3.5.2
4.3.5.3
TABLE OF CONTENTS (Continued)
Title Page
SECTION IV. THEORY OF OPERATION
General ............................................... 4-1
Principles of Operation .................................... 4-1
Dot Matrix Printing Mechanism ............................. 4-1
Printhead Assembly .................. . . . . . . . . . . . . . . . . .. 4-2
Carriage Drive
....................................... 4-2
Paper Drive ......................................... 4-3
Ribbon Drive ........................................ 4-4
Dot Matrix Printing Mechanics ............................ 4-4
Electronic
Control Subsystem ............................... 4-6
Firmware
Program Overview ............................... 4-8
Printhead/ Carriage Subsystem .............................. 4-8
Printhead Drive ...................................... 4-9
Carriage Drive ....................................... 4-9
Paper Feed Subsystem .................................. 4-11
Power Supply ........................................ 4-12
Fuses
.............................................. 4-14
Theory
of Operation ..................................... 4-14
Overview ........................................... 4-14
Processor Board
...................................... 4-16
Microprocessor System
................................ 4-16
Communications Interfaces
.............................. 4-18
FIFO Buffer ....................................... 4-18
Printhead Carriage Control .............................. 4-18
Software .......................................... 4-22
Driver Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-29
Printhead Driver Circuits ............................... 4-29
Carriage
Motor Driver Circuit ............................ 4-32
Paper Feed Motor Driver Circuits ......................... 4-36
Power Supply ........................................ 4-42
AC Power Module ................................... 4-43
+30 Vde Supply ..................................... 4-44
+5 Vde Regulator .................................... 4-44
+8 SW ........................................... 4-47
±12 Vdc
and -5 Vdc Regulators ........................... 4-48
-75 Vdc Supply ..................................... 4-49
Overvoltage Protection Circuit ............................ 4-49
Power Good/Reset ................................... 4-50
Current Loop Option Board ............................... 4-52
Receiver Circuit ..................................... 4-52
Transmitter Circuit .................................... 4-53
Auxiliary Parallel Interface '............................... 4-53
vii

TABLE OF CONTENTS (Continued)
Paragraph Title Page
SECTION V. MAINTENANCE
5.1 General ........................ 0 0 0 • 0 • 0 •• 0 • 0 0 0 0 • 0 •• 0 0 0 0 5:-1
5.2 Preventive Maintenance 0 0 0 0 • 0 • 0 0 0 0 0 0 0 •• 0 0 • 0 • 0 •• 0 0 0 0 0 0 0 0 •• o. 5-1
5.3 Troubleshooting 0 0 0 0 0 0 0 • 0 0 0 0 0 0 0 • 0 • 0 • 0 ••• 0 ••••• 0 • 0 0 • 0 0 0 • o. 5-1
5.4 Removal and Replacement . 0 • 0 0 •• 0 • 0 • 0 0 •• 0 • 0 • 0 ••••• 0 •• 0 0 0 0 o. 5-3
5.4.1 Printed Circuit Boards 0 0 0 • 0 •• 0 •• 0 •••• 0 •• 0 ••• 0 •• 0 •• 0 • 0 • 0 0 0 5-3
5.4.2 Battery (996351-0001) .... 0 0 • 0 0 0 0 0 • 0 0 0 • 0 ••••••• 0 ••••••• 0 •• 5-5
5.4.3 AC Power Module (994373-0001) Removal and Replacement
.......... 5-5
5.4.4 Motherboard (994330-0001)
............. 0 • • • • • • • • • • • • • • • • •• 5-7
5.4.5
Fan Assembly (996275) .......... 0 ••••••••••• 0 0 •• 0 • • • • • • •• 5-8
5.4.6 Printhead (994258)
.......... 0 ••••••• 0 • 0 •• 0 •• 0 • 0 0 0 0 0 • • • •• 5-9
5.4.7
Paper Drive Motor Assembly (994183) 0 ••• 0 •••• 0 0 0 0 0 0 0 0 •• 0 0 0 • 0 5-10
5.4.8 Paper Tractor (996158-0001, 0002) o. 0 0 • 0 •• 0 • 0 ••••••••• 0 • 0 0 0 0 0 5-11
5.4.9 Ribbon Drive Assembly (994215) 0" 0 • 0 0 •••• 0 0 • 0 0 • 0 •••• 0 0 0 • 0 5-13
5.4.10 Control Panel (994251) 0" 0 0 0 0 0 • 0 0 '0 • 0 0 • 0 •• 0 • 0 • 0 0 • 0 0 0 0 • 0 0 5-14
5.4.11 Auxiliary Control Panel Assembly (994257) . 0 0
•• 0 • 0 • 0 • 0 0 • 0 • 0 0 0 0 • 0 5-15
5.4.12 Carriage Drive
Motor Assembly (994238) 0.' 0 0 0 •• 0 • 0 • 0 0 •• 0 0 0 0 • 0 5-16
5.4.13 Wire Rope
.. 0 0 0 0 0 ••• 0 •••• 0 •• 0 • • • • • • • • • • • • • • • • • • • • • •• 5-18
5.4.14 Carriage and
Paper Drive Assembly (994183) ...... 0 •• " • • • • • • • • •• 5-20
5.4.15 Secondary Fuse 0 ••••••••••• 0 •• 0 ••••••••••• 0 • • • • • • • • • •• 5-21
5.4.16 Power Line Fuse ................................ 0 • 0 •• 0 5-22
5.5 Adjustments ....... 0 ••• 0 •••••••• 0 ••••••• 0 • • • • • • • • • • • • •• 5-24
5.5.1 Ribbon Guide ............ 0 ••• 0 •••• 0 •••••••••••• 0 • • • •• 5-24
5.6 Testing
............... 0 ••••• 0 •• 0 •••••••••••••• 0 •• 0 • •• 5-24
SECTION VI. ASSEMBLY DRAWINGS AND LISTS OF MATERIAL
SECTION VII. SCHEMATIC DIAGRAMS
APPENDIX A. CHARACTER SET DOT MATRIX
APPENDIX B. ASCII CONTROL AND CHARACTER CODE
APPENDIX C. MODEL 810 PRINTER VERSIONS,
OPTIONS, AND ACCESSORIES
APPENDIX D. TMS 8080A MICROPROCESSOR
APPENDIX E. TMS 5501 I/O CONTROLLER
APPENDIX F. INSTALLATION OF OPTIONAL KITS
ALPHABETICAL INDEX
viii

LIST OF ILLUSTRATIONS
Figure Title Page
I-I Model 810 Printer ........................................ I-I
2-1 Printer Dimensions ........•.............................. 2-1
2-2 Rear View of Printer .........•............................ 2-2
2-3 Ground Jumper Location ................................... 2-3
2-4 Cable Options _.. . . . . . . . . . . • . . . . . . . . . • . . . . . . . . • . . . . . . . . .. 2-4
2-5 Line Voltage Selection
..................................... 2-5
3-1 Control Locations ........................................ 3-1
3-2 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-2
3-3 Auxiliary Control Panels
................................... 3-4
3-4 Ribbon Installation
....................................... 3-6
3-5
Paper Loading .......................................... 3-8
3-6 Asynchronous Data Format ................................ 3-21
3-7 Parallel Interface Character Timing
........................... 3-24
4-1 Model 810 Printer Simplified Block Diagram ...................... 4-2
4-2 Model 810 Printer
Print head Assembly .......................... 4-3
4-3 Printing the Letter
"E" ..................................... 4-5
4-4 Electronic Control Subsystem Block Diagram
...................... 4-7
4-5 Printhead/Carriage Subsystem Block Diagram
........... ~ . . . . . . . .. 4-9
4-6 Carriage
Motor Shaft Encoder Phase Relationship for
Left-to-Right Carriage Motion
.....•....................... 4-10
4-7 Carriage Velocity Profiles Print Mode .......................... 4-11
4-8
Paper Drive System Block Diagram ........................... 4-12
4-9 Model 810 Printer Power Supply Block Diagram
.................. 4-13
4-10 Model 810 Printer Simplified Electronics Block Diagram ............. 4-15
4-11 Processor
PC Board, Detailed Block Diagram .................... 4-17
4-12
FIFO Memory Write Cycle, Timing Diagram ..................... 4-19
4-13 Carriage
Motor Shaft Encoder State Diagram .................... 4-20
4-14 Carriage Speed Control Counter Timing Diagram .................. 4-21
4-15 Forming the Character
"W" ................................ 4-22
4-
16 Printhead Solenoid Timing Diagram ........................... 4-23
4-17 Normal
Print Mode Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-24
4-18 Printer Subroutine
EI00 Accept States State Diagram ............... 4-26
4-19 Test Mode Flow
Chart .................................... 4-27
4-20 Printhead Carriage State Diagram .......... :................. 4-27
4-21 Driver Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-30
4-22 Printhead Solenoid Current Pulse Profile ........................ 4-31
4-23 Printhead Power Driver Simplified Schematic
.............. . . . . . .. 4-32
4-24 Printhead Carriage Driver Simplified Schematic
................... 4-33
ix

LIST OF ILLUSTRATIONS (Concluded)
Figure Title Page
4-25 Printhead Carriage Driver Circuit Forward Command ............... 4-34
4-26
Print head Carriage Motor Current Waveforms ................. 0 •• 4-35
4-27 Variable Reluctance,
Paper Feed Stepper Motor . 0 • 00 0 ; .• ' ••• 0 • oC 0 0 • •• 4-36
4-28 Stepper
Motor Drive Circuit Simplified Diagram ..... 0 ••• 0 0 •• 0 • 0 0 0 4-39
4-29
St~pper Motor Drive Circuit, Phase A 0 0 0 • 0 • 0 •••• " • 0 0 ••• 0 • • • • •• 4-40
4-30 Stepper
Motor Circuit Waveforms ... 0 ••• 0 0 • 0 ~ ••••••••••• ". • • •• 4-41
4-31 Paper Feed Stepper Motor Currents ................ 0 •••••••• 0 0 4-43
4~32 Stepper Motor Line Feed Cycle . 0 0 0 0 0 0 0 • 0 0 0 •• 0 0 0 • 0 •• 0 • 0 • 0 0 0 • 0 4-44
4-33 Power Supply Functional Block Diagram o. 0 • 0 0 0 • 0 0 0, 0 •••• 0 0 ••• 0 0 4-45
4-34 Power Transformer Primary
Tap Arrangements 0 0 • 0 • 0 0 • 0 0 •••• 0 0 •• 0 4-46
4-35 30 Vdc Supply
o. 0 0 • 0 ••• 0 0 0 0 •• 0 0 0 0 0 •• 0 0 • 0 0 0 0 • 0 •• 0 ..... 0 •• 4-46
4-36
+5 Vdc Regulator ... 0 0 0 • 0 0 0 0 • 0 0 • 0 0 0 • 0 0 0 0 • 0 0 0 0 • 0 0 0 0 ••• 0 • 0 4-47
4-37 +8 SW Line .. 0 0 •• 0 •• 0 • 0 0 0 0 0 • 0 • 0 0 0 0 0 0 • 0 •• 0'0 ••••• 0 • 0 0 0 •• 4-48
4-38 ±12 Vdc and
-5 Vdc Regulators .. 0 •• 00 0 0 0 0 • 0 • 0 • 0 • 0 0 0 ••••••• 0 •• 4-48
4-39
-75 Vdc Supply . 0 0 • 0 • 0 • 0 • 0 0 •• 0 0 0 0 • 0 •• 0 0 0 0 0 0 • 0 0 0 0 •• 0 • 0 •• 4-49
4-40 Overvoltage Protection Circuit 0 0 ••• 0 0 ... 0 • 0 • 0 • 0 • 0 0 0 •• 0 • 0 • 0 0 0 •• 4-50
4-41 Powergood/Reset Signal Profiles 0 ••• 0 •• 0 • 0 0 0 0 •• 0 0 • 0 • 0 • 0 • 0 • 0 •• 4-51
4-42 Powergood/Reset Circuit Block Diagram 0 0 • 0 0 0 • 0 ••• 0 • 0 ••• 0 • 0 0 0 • 0 4-51
5-1 Lubrication Points ............... 0 ••• 0 0 • 0 • • • • • • • • • • • • • • • • • 5-1
5-2 Electronics Cover Removal ................ 0 • 0 ••••••• 0 ••••••• 5-4
5-3 Battery Replacement . 0 • 0
•• 0 ••••• 0 0 •••• 0 0 0 0 0 0 0 •••••••• 0 ••• 0 5-5
5-4 AC Power Module 0
•••••• 0 0 ••• 0 •• 0 0 ••• 0 • 0 • 0 0 •• 0 •• 0 • 0 • 0 0 •• 5-6
5-5 Motherboard .... 0 ••• 0 • 0 •••••• 0 •• 0 ••• 0 • 0 0 ••• 0 0 •• 0 •••• 0 •• 5-7
5-6 Fan, Card Guide
and Bracket 0 0 ••• 0 0 •• 0 ••• 0 0 ••••• 0 •• 0 • 0 0 • 0 ••• 5-8
5-7 Printhead Being Removed 0 • • 0 0 • • • 0 0 0 • • • 0 • 0 0 • • 0 • • • • • 0 0 • • • 0 •
•• 5-9
5-8
Paper Drive Motor with Gear, Connector and Shaft
Removed . 0 • 0 • 0 • • • 0 • 0 0 0 0 • • 0 0 • 0 • 0 • 0 0 0 0 0 0 0 0 0 0 0 0 0 • 0 • • 0 0 5-10
5-9 Left Paper Advance Bearing 0 0 0 0 ••• 0 • 0 0 0 0 • 0 0 • 0 0 0 0 0 0 0 0 0 0 0 0 0 • 0 5-12
5-10 Paper Tractors Removal 0 0 0 0 • 0 0 •• 0 ••• 0 • 0 0 0 0 • 0 0 0 0 0 •• 0 • 0 0 0 0 • 0 5-12
5-11 Ribbon Drive Assembly 0 0 0 0 0 0 0 ••• 0 0 • 0 0 0 0 0 0 • 0 •• 0 •• 0 0 0 • 0 • 0 o. 5-13
5-12 Ribbon Drive Assembly Removal
o. 0 •• 0 • 0 • 0 0 0 •• 0 •••••• 0 0 • 0 • 0 o. 5-14
5-13 Control Panel Assembly 0 ••••• 0 • 0 •• 0 0 • 0 • 0 •• 0 0 ••• 0 • 0 • 0 • 0 • • •• 5-15
5-14 Auxiliary Control Panel 0
••• 0 ••• 0 • 0 0 0 •••••• 0 0 0 ••• 0 • 0 • • • • • •• 5-16
5-15 Carriage Drive
Motor . 0 ••••• 0 •• 0 0 0 0 0 • 0 0 0 0 •• 0 0 • 0 0 • 0 • 0 0 0 0 o. 5-17
5-16 Idler Pulley 0 0 0 0 0 0 0 0 0 0 0 0 • 0 ••• 0 0 0 • 0 • 0 0 0 0 •••• 0 0 0 ~ 0 0 0 0 0 • o. 5-18
5-17 Wire Rope Detail
o. 00 • • 0 0 • • 0 • 0 0 0 0 • • 0 0 • 0 0 0 0 0 • • 0 0 0 0 0 0 0 • 0 • 0 5-19
5-18 Carriage
and Paper Drive Assembly 0 0 0 •• 0 0 • 0 0 0 0 0 0 0 0 0 0 • 0 0 •••• o. 5-20
5-19 Paper-Out Switch 0 0 •• 0 0 • 0 •• 0 •• 0 0 0 0 0 • 0 0 0 0 0 0 0 0 0 0 •• 0 0 0 0 0 0 o. 5-21
5-20 Secondary Fuse Area 0 0 0 • 0 0 •••••• 0 0 • 0 0 0 0 • 0 0 • 0 0 0 0 ••• 0 • 0 • 0 0 0 5-22
5-21 Power Plug
at Rear of Printer . 0 0 0 0 0 0 • 0 0 0 •• 0 •••• 0 ••• 0 • 0 • 0 • o. 5-23
5-22 Test Barber Pole Printout 0 0 0 0 0 0 • 0 0 • 0 0 0 0 0 0 0 • 0 0 0
•• 0 0 0 0 ••••• o. 5-25
6-1 Model 810 Printer Major Assemblies .•... 0 0 0 -. 0 0 0 0 0 •• 0 0 0 0 •• 0 0 0 0 • 0 6-3
x

LIST OF TABLES
Table Title Page
I-I
Standard Features and Specifications 1-2
3-1 Self-Help Procedures ..................................... 3-19
3-2 Software
Commands ...................................... 3-26
3-3 Column or Line '~n" Number Conversion ......................... 3-28
4-1
4-2
4-3
5-1
5-2
C-l
C-2
C-3
C-4
Printhead Subroutine EI00 Accept States ...................... .
Carriage
State Maximum Software Execution Times
(Microseconds)
....................................... .
Carriage
Motion Reference Speeds ........................... .
Failure Analysis
Chart ................................... .
Option PROM Part Number and Location ...... ........... .. .. ...
List of Designations ...................... . ............. .
Printer Versions ....................................... .
Printer Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Printer Accessories ..................................... .
xi/xii
4-25
4-28
4-28
5-2
5-26
C-I
C-2
C-3
C-5

SECTION I
GENERAL
DESCRIPTION
1.1 INTRODUCTION .
.This section of the manual contains a general description of the TexasInstruments Model810 Printer
shown in Figure
1-1. Specifications and features are listed in Table 1-1.
A0001245
Figure 1-1. Model 810 Printer
1-1

CHARACTERISTICS
PRINTING
Technique
Character matrix
Character set
Characters per inch
Characters per line
Lines per inch
THROUGHPUT
Print speed
Lines per minute
Line feed
Paper slew
PAPER HANDLING
Paper width
Paper loading
Number of copies
CONTROL SYSTEM
Electronics
Printing method
Buffer (FIFO) capacity
Horizontal tabs
Vertical format control
Self-test
Bell
COMMUNICATIONS
Interface
Baud rates
Parity
INPUT POWER
AC voltage
Frequency
Power consumption
Power fuse
ENVI RONMENT
Mounting
Operating temperature
Storage tem peratu re
Operating humidity
Storage humidity
PHYSICAL
Weight
Height
Width
Depth
Table 1-1. Standard Features and Specifications
SPECI FICATION
Wire matrix impact
9 x 7 (9 wide, Thigh) dot matrix
64-character ASCII
10
132 maximum
6 or 8 (operator or software selectable)
150 characters per second
64 at 132 characters per line, and up to 450 at 10 characters per Hne
33 milliseconds
17.7
cm per second (7 inches per second)
Adjustable from 7.6
to 38.1 cm (3 to 15 inches)
Rear or bottom feed
One original and five copies
TMS 8080 microprocessor system
Bidirectional
256 characters
Software programmable
Software and operator programmable
Prints ASCII characters in a rotating pattern (barber pole)
Pulsing audible tone
Serial (EIA R5-232-C)
110,150,300,1200,2400,4800,9600
Odd, even, or ignore
100,120,220, or 240 Vac (+10% to -15%)
47 to 63 hertz
200 watts maximum
100 or 120 Vac range requires 5 amp., 250 V fuse
220 or 240 Vac range requires 2.5 amp., 250 V fuse
Table top
+5°C (+37°F) to +40°C (+l04°F)
-30°C (-22°F) to +70°C (+158°F)
5% to 90% (no condensation)
5% to 95% (no condensation)
25 kilograms (55 pounds)
20.3 cm (8 inches)
65.4 cm (25-3/4 inches)
50.8 cm (20 inches)
1-2

1.2 DESCRIPTION.
The Model 810 Printer is a receive-only, forms programmable, impact printer. The printer features a
microprocessor system which controlsall characterrecognition, printing, and papermovement. Basic
operating,
data processing, and self-test routines for the microprocessor system are resident in read-
only memory(ROM). Random-access memory (RAM) stores vertical format control routines which
are locally programmable by the operator
or remotely programmable through the communications
line.
A single printhead produces a seven-dot column which forms the 9 x 7
dot matrix used for character
generation (see Appendix
A). TheASCII64-characterset is standard; a completeASCII95-character
set (see Appendix
B) and othercharacter sets are available as options. Printing is bidirectional at the
rate
of 150 characters per second. A full 132-character line is printed in less than 1 second.
Standard print format
is ten characters per inch horizontally and six or eight lines per inch verti-
cally. An option
is available to add 16.5 characters per inch (compressed print) capability. The
printer produces one original and up to five copies using sprocket-fed paper in widths from 7.62 to
38.1 centimeters (3 to 15 inches).
In addition to the standard serial interface, a parallel interface or a TTY current loop interface is also
available as
an option.
1.3 CONFIGURATION.
The Model 810 Printer is available in five different versions:
PART NUMBER CODE TYPE
994292-0001 BSC Basic
994292-0002
FLC
Forms Length Control
994292-0003
VFC
Vertical Format Control
994293-0001 FCO
Forms Length, Compressed Print
994293-0002 VCO Vertical
Format Control, Compressed Print
Complete identification of the options (see paragraph 1.5) installed in each printer is provided on the
underside
of the access door using three-letter configuration codes.
1.4 MODIFICATION FEATURES.
The following standard modification features are available in all printers:
• Ability to enable or disable the NDE option (recognition of DELETE characters) on
processor board . To enable install Bergconnectorbetween terminals E2 and E3. To disable
(NDE printer option) install Berg connector between terminals El and E2.
• Ability to modify the DNB option (busy or not busy on DTR line). Install Berg connector
between terminals E4 and E5 on processor board for DTR = ON LINE onlyand secondary
request
to send (SCA) signal not busy. Install Berg connector between terminals E5 and E6
for DTR = ON LINE and NOT BUSY (DNB printecoption).
1-3

• Ability to modify the IRC option (reverse channel signal). Connect Berg connector be-
tween terminals E8 and E9 (on processor board -0002 only) for asserted signal HIGH
(standard). Connect Berg connector between terminals E7 and E8 for asserted signal
LOW
(lRC printer).
.• Bell option. Disconnect R99 connection on Power Supply board to disable bell.
1.5 OPTIONAL FEATURES.
The following features (identified by configuration code in parentheses) are offered as options:
Full ASCII 95-character set (FUL)
European (DNF, DNL,
SWF, SWL, UKF, or UKL) and other character sets
Texas Instruments-compatible (PLT)
TTY 20-mA neutral current loop (TTY)
Selectable forms lengths (FCO
or FLC)
Vertical Format Control, non-volatile eight-channel memory (VCO
or VFC)
Compressed print 16.5 characters per inch (FCO
or VCO)
Elapsed Time Indicator
Line Buffer Option Kit (See Appendix F for installation instructions).
1.6 ACCESSORIES.
The following items are available
as accessories:
Paper Basket
Floor Mounting Stand
Interface Cable (See cabling information in Section II for selection of cables.)
1-4

SECTION II
INSTALLATION
2.1 INTRODUCTION.
This section provides information for selecting the installation site, unpacking and setting up the
printer,
and ensuring that the printer is operating properly.
2.2
SPACE REQUIREMENTS.
The printer occupies a flat surface area 65.4 centimeters (25.75 inches) wide by 58.4 centimeters (23
inches) deep including cableclearanceof7.6centimeters
(3 inches) .SeeFigure 2-1 for printeroutline
dimensions. Space must be provided for adequate ventilation. Particular care must be taken to
prevent blocking the cooling fan intake and exhaust louvers (on either side of the printer). An
unobstructed paper feed path must be provided behind or below the printerfor the paper supply. A
method of holding the printed output must also be provided ifthe optional paper basket accessory is
not used. The printershould be so located as to allow easyaccess to the operator controls. Theprinter
should not be placed in an environment where humidity, temperature, or otherspecificationslisted in
Section I may be exceeded. A sturdytable capable of adequatelysupporting 25 kilograms (55 pounds)
is suitable if the optional floor mounting stands are not used. Regardless of the mounting selected,
care must be taken to ensure that the paperchute underneath the printer does not bearany weight of
the printer and is not subjected to any pressure which could deform it.
I
~
65.4 CM
(253/4 IN)
A0001246
I
I I \J
1
u-
Z
M -
ci 00
N-
)
~ ______ 50.8 CM --------I.-t
(20 IN)
Figure 2-1. Printer Dimensions
2.3
UNPACKING AND SETTING UP.
To remove the printerfrom its'shipping carton and place the printer in its normal operatinglocation,
perform the following procedure.
I. Examine shipping carton for apparent damage. If any damage is observed, note nature of
damage and follow local procedure for handling damaged shipments.
2. Place shipping carton on floor and open top of shipping carton.
3. Remove loose items from shipping carton.
2-1

4. Using an assistant, grip printer close to styrofoam end caps (at either end of printer), lift
printer from shipping carton, and place .printer on table or optionalfloor mounting stand.
5. Remove styrofoam end caps.
6. Remove two mechanism shipping snubbers and related hardware underneath printer.
7. Open access door, remove styrofoam block covering printhead, and remove rubber band
wrapped around printhead.
8. Slide
printhead from stop to stop and check that printhead and attached wire rope move
freely
and that wire rope is not unstrung.
9. Close access door.
10. (If applicable) Install optional paper basket.
2.4 CABLING
AND GROUNDING INFORMATION.
The communications interface connector (or connectors) is located at the right rear of the printer
(Figure 2-2). All printers have
an EIA Standard RS-232-C interface connector for serial input. A
parallel
or a TTY interfaceconnector is available as an option. The logic(signal) ground is connected
to the safety (chassis) ground by a jumper from E6 to E7 on the motherboard (Figure 2-3). The logic
ground can be isolated from the safety ground by cutting this jumper. To gain access to ground
jumpers remove the top cover, electronics cover, and the printed circuit boards(refer to Section V).
Cables for various input devices are available as options. Refer to Figure2-4forcablingrequirements
to the indicated input devices.
SNUBBER SNUBBER
Figure 2-2. Rear View of Printer
2-2

BLUE
r= MOTHERBOARD
r LOGIC GROUND TO SAFETY GROUND JUMPER
.-----.---------rl---,0t- YELlOW
loT-GREEN
=========================I==~RED
~------------------~I---,~I ORANGE
OPTION
XA3P2
101
0ITTY OPTION
XA3P1
o PROCESSOR
XA2P2
0 o IPROCESSOR XA2P1
b d
XA1P2
10 I
01 DRIVER
XA1P1
P1
F1
1A
] E d [ OjPOWER SUPPLY
XA4P2
\01 [ 0 \POWER SUPPLY XA4P1
F2
3A
E d
F3
1A
E d
F4
1A
b d
F5
1A
[!!J
~
~
[![]
~
Q[J
Figure 2-3. Ground Jumper And PC Board Locations
2.4.1
SERIAL INTERFACE CABLE (EIA). The printer serial interface connector Jl3 requires a
25-pin connector
(AMP 205208-1 or equivalent) with signal lines connected as follows:
ElA (CCITT)
PIN
SIGNAL NAME
DESIGNATION
1 Protective Ground AA (101)
2
Transmitted data
BA (103)
3 Received
data
BB (104)
4 Request
to send
CA (105)
5 Clear
to send
CB (106)
6 Data
set ready
CC (107)
7 Signal ground
AB (102)
8 Received line signal
detector (carrier detect) CF (109)
9
+12 votts NA
10
-12 volts NA
11
Secondary request to send (reverse channel) SCA (120)
20
Data terminal ready
CD (108.2)
Recommended maximum length is 6 meters (20 feet).
2-3

I
103
DATASET
202/212
DATA SET
770
INT. TERM
0)
c:::J J13
PRINTER
0
PRINTER
c::::r J13
~------------------~[][]------------------~~c::JJ13
PRINTER
o 0
:1
742 ASR
[][J------ ~
r.;'\ r.:\ " PRINTER
L _____ .:!Jr-------\::..J-5----
CIJ
--- . __ ~_-----'".,' L. ___ J1_3 _______ ~
733 ASR
743
990
COMPUTER
ITEM
NUMBER
0
0
PART
NUMBER
993204·0001
r-------- ------------- ---
2 993205-000 1
c::r::::J
CTI
CD
3!
DESCRIPTION
103 DATA SET CABLE
202/212 DATA SET CABLE
r-----------------------
3 969626-0001
742 TERMINAL CABLE
~------+-------------- -- t-----------------
4
5
993210-0001 DATA TERMINAL CABLE
973265-0001
- f-----------------
742 AUXILIARY EIA _
INTERFACE CABLE
0
0
0
0
6
959372-0002
ASR TERMINAL CABLE (1200 BAUD)
b?J13
PRINTER
c:::J J13
PRINTER
PRINTER
c::::J J13
c::::J J19
PRINTER WITH
TTY
c::J J13
INTERFACE
@
_J18
PRINTER WITH
PARALLEL
c:::::l J13
INTERFACE
LENGTH
METERS
(FEET)
1.8
(6)
- ----
1.8
(6)
r-------------
~- -------
(6)
1.8
f----- -- -- ------
1.8 (6)
-----
3.6
(12)
1.8
(6)
- ------ ---- -
---- --------
7
983848-0001
743 TERMINAL CABLE
1.8
(6)
I-------+_ -------------------- ----------- ---------- ------ --- - ------
------ -----r-- ------t
8 975056-0010
990 COMPUTER CABLE
3 (10)
1---------+----------- - r---------- ----------
- ------ ---- ---- --- -----------
8
975056-0020 990 COMPUTER CABLE
r--------- --------------1--------------
9 994403-0001
CURRENT LOOP INPUT CABLE
(INCLUDED IN TTY OPTION)
6 (20)
------
1.8
(6)
I---.----+---------------f------------------------r------------
10
414127-0001
CONNECTOR ONLY !INCLUDED
IN PARALLEL OPTION)
I--------+------------f------------------------ f------- ------
ALSO
AVAILABLE
A0001249
993211-0001 EIA EXTENSION CABLE (25 WIRES) 1.8
(6)
Figure 2-4. Cable Options
2-4