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Interface Timing, Data transfer must be carried out by observing the ACKNLG or

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Interface Specifications The column heading "Direction" refers to the direction of signal flow as viewed from the printer. "Return" denotes the twisted-pair return, to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair cable for each signal and to complete the connection on the return side. These cables should be shielded and connected to the chassis of the host computer and the printer. All interface conditions are based on TTL level. Both the rise and the fall times of each signal must be less than 0.2 microseconds. Data transfer must be carried out by observing the ACKNLG or BUSY signal. Data transfer to this printer can be carried out only after receipt of the ACKNLG signal or when the level of the BUSY signal is LOW. Interface Timing The figure below shows the timing for the parallel interface. BUSY ACKNLG Technical Specifications 8-11

Section	Page
FRONT MATTER	1
CONTENTS	6
INTRODUCTION	8
Features	8
Options	9
About This Manual	11
Application Notes	12
Where to Get Help	13
CHAP 1-SETTING UP THE PRINTER	14
Unpacking the Printer	15
Checking the Parts	15
Choosing a Place for the Printer	17
Assembling the Printer	19
Installing the Platen Knob	19
Installing the Ribbon Cartridge	20
Attaching the Paper Guide	23
Testing the Printer	26
Plugging in the Printer	26
Running the Self Test	27
Checking the Operation	34
Connecting the Printer to Your Computer	35
The Parallel Interface	35
Setting Up Your Application Software	38
Choosing From a Menu	38
CHAP 2-PAPER HANDLING	39
Using Single Sheets	40
Loading Paper	40
Reloading During Printing	43
Using Continuous Paper	44
Positioning Your Continuous Paper Supply	44
Loading Continuous Paper	45
Switching Between Continuous and Single Sheets	51
Switching to Single Sheets	51
Switching Back to Continuous Paper	55
Printing on Special Paper	58
The Paper Thickness Lever	58
Multi-part Forms	61
Labels	62
Envelopes	64
CHAP 3-USING THE PRINTER	66
Operating the Control Panel	67
Setting the DIP Switches	71
Changing a DIP Switch Setting	71
The DIP Switch Tables	72
The DIP Switch Functions	74
Page Length	75
Skip Over Perforation	76
Adjusting the Loading Position	77
The Loading Position	77
Using Micro-adjustment	78
Using Short Tear-Off	79
Adjusting the Tear-off Position	80
Selecting Typestyles	82
Character Fonts	83
Condensed Mode	84
Selecting an International Character Set	85
Choosing a Character Table	87
Using the Data Dump Mode	89
CHAP 4-SOFTWARE AND GRAPHICS	92
Enhancing Your Printing	93
Character Spacing	93
Character Size	94
Special Effects and Emphasis	95
Selecting Typestyles With Master Select	97
Graphics	100
The Print Head	101
The Graphics Command	104
Column Reservation Numbers	105
A Simple Graphics Program	105
Designing Your Own Graphics	106
User-defined Characters	111
Designing Your Characters	111
Defining Your Characters	113
Sending Information to Your Printer	115
Printing User-defined Characters	118
Copying ROM Characters to RAM	119
Letter Quality Characters	120
Mixing Print Styles	121
CHAP 5-USING THE PRINTER OPTIONS	123
The Cut Sheet Feeder	124
Installation	124
Paper Handling	127
Testing the Printer in the Cut Sheet Feeder Mode	131
Operating the Cut Sheet Feeder	133
Single-sheet Insertion	133
Removing the Cut Sheet Feeder	137
The Pull Tractor	139
Installation	139
Paper Handling	141
Removing the Pull Tractor	146
The Multi-Font Module	150
Installation	152
Selecting a Font	155
The Interface Boards	156
Choosing an Interface	156
Compatible Interfaces	157
Installation	157
#8143 New Serial Interface	163
CHAP 6-MAINTENANCE	165
Cleaning the Printer	166
Replacing the Ribbon	168
Transporting the Printer	174
CHAP 7-TROUBLESHOOTING	175
Problems and Solutions	176
Power Supply	178
Printing	179
Paper Handling	188
Options	198
CHAP 8-TECHNICAL SPECIFICATIONS	209
Printer Specifications	210
Printing	210
Paper	212
Mechanical	215
Electrical	216
Environment	216
Interface Specifications	217
Pin Assignments for the Parallel Interface	217
Interface Timing	219
Printing Enabled/Disabled Signals and Control Conditions	220
Option Specifications	221
Single-bin Cut Sheet Feeder (Optional)	221
Initialization	223
Default Settings	223
CHAP 9-COMMAND SUMMARY	225
Using the Command Summary	226
Control Key Chart	228
Commands in Numerical Order	229
Commands Arranged by Topic	232
Printer Operation	232
MSB Control	235
Data Control	236
Vertical Motion	237
Horizontal Motion	243
Overall Printing Style	246
Print Size and Character Width	248
Print Enhancement	252
Word Processing	257
Character Tables	258
User-defined Characters	260
Graphics	262
APPENDIX	265
Proportional Width Table	266
Character Tables	270
GLOSSARY	272
INDEX	280
QUICK REFERENCE	285
Control and ESCape Codes by Function	286
Printer Diagram	289