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Epson MX-82, MX-82 F/T 2. Definitions of Some Terms Often Used

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2. Definitions of Some Terms Often Used

Before looking at the printer in detail, some terms should be defined first so that you can understand them more easily and in less time.

They are;

*ASCII code

*Escape codes

*“+” symbol

*2, D and H

If you are already familiar with the above terms, skip these paragraphs.

(1) ASCII code

Characters in computer systems are represented by groups of bits. The various groups of bits that represent the set of characters that are the “alphabet” of any given system are called a “coding system”, or simply “code”.

Codes for representing the information vary in relation to both the number of bits used to define a single character in the assignment of bit patterns to each particular character.

In US ASCII (The United States of America Standard Code for Information Inter- change) code the bit group (01000001)z = ~41 >H represents the character “A”. The sending and receiving equipment must be programmed to acknowledge the code used in computer systems.

The MX-82 has 96 character set and control codes. In addition, it has an inter- naitonal character set as shown in a previous chapter. Those characters are put in some addresses of the ASCII code table instead of the standard characters. And those can be accessed by a particular control code or the DIP switch.

Alphabets, numbers and special symbols are addressed from <~O>H to

<7 E > H and from < A0 > H to < FE > H. So same characters are put in two differ- ent addresses. The selection of which one to use is up to you if your machine has an 8-bit data bus line.

(2)Escape codes

In a lot of control codes that the MX-82 has, you might be confused by the word “ESCAPE”.

Some alphabetical letters and some numbers follow it. Each of them causes a special function to the printer, i.e.

(a)To format a sentence.

(b)To do emphasized printing.

(c)To select paper end detector programmably.

(d)To set column length.

(e)To select an international character set.

(f)Others.

Generally, printer control codes, especially like “ESCAPE”, are not standardized. Every computer and printer manufacturer applies its own meaning to such codes.

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Contents

Page Page TABLE OF CONTENTS GENERAL INSTALLATION Repacking steps Counting OPERATION Self-Test Setting of DIP Switches WHAT IS THE MX-82 LIST OF FIGURES Fig Laying Fig. 40 Adjustment of Inserted Paper Position Fig. 41 Alignment of Side Edges Page GENERAL DESCRIPTION 2. Characteristics INSTALLATION OF MX-82 Page 3.Installation of the Printer Surface Philli Fig. 4 Assembly Tools Right Side of the Printer Fig. 5 Removal of Shipping Screws STEP 4. Cartridge Ribbon Setting Fig. 8 Cartridge Ribbon Setting Fig. 9 Cartridge Ribbon Setting NOTES 1: Fig. 10 Examples of Correct and Incorrect Ribbon Setti ng 5. Separator Installation Fig. 11 Separator installation 6. Paper Loading 6.1. Loading of fanfold paper IN OUT Fig. 12 Insertion of Fanfold Paper Fig. 13 Raising of Sprocket Lock Levers Fig. 14 Engagement of Paper Feed Holes on Feeding Pins Fig. 15 Printer with Fanfold Paper Set Completely Fig. 16 Example of Paper Arrangement 6.2 Removal of fanfold paper 6.3 Column layout on fanfold paper 6.4 Top of form position setting Fig. 17 Top of Form Page INSTALLATION OF MX-82F/T 2. Counting the Parts MX-82F/T 4. Power Cord (Only European Type 220/240V) MX-82F/T Operation Manual Fig. 19 Contents of Carton CRT Display MX-82F/T Type Fig. 20 Laying Printer on Firm Surface Fig. 21 Assembly Tools Fig. 22 Removal of Shipping Screws Lid (2) Option Fig. 24 Cartridge Ribbon Setting Fig. 25 Cartridge Ribbon Setting NOTES: .-Ribbon I Ribbon Mask IncorrectIncorrectCorrect Fig. 26 Examples of Correct and Incorrect Ribbon Setting 6. Mounting and Dismounting of Tractor Unit Fig. 28 Dismounting of Tractor Unit Fig. 29 Mounting of Tractor Unit 7.Paper Loading 7.1Fanfold paper ket Lock Lever Fig. 31 Raising of Sprocket Lock Levers Fig. 32 Engagement of Paper Feed Holes on Feeding Pins Fig. 33 Printer with Fanfold Paper Set Completely NOTE: arrangement Fig. 34 Example of Paper Arrangement Page 7.2Roll paper Fig. 36 Loading of Roll Paper (1) Fig. 37 Loading of Roll Paper (2) Fig. 38 Loading of Roll Paper (3) 7.3Cut paper sheet Fig. 39 Loading of Cut Paper Sheet Fig. 40 Adjustment of Inserted Paper Position top Fig. 42 Form Position Setting Mark 305mm (’ 2”]J7:q Fig. 43 Print Area Letter Size Paper I+--..-A4 Size Paper t-y Fig. 44 Setting of Cut Paper Sheet Fig. 45 Printer with Cut Paper Sheet Set Completely 8. Gap Adjustment used Position of adjusting lever Single-leafpaper Set the lever to the 4th step Fig. 46 Gap Adjustment OPERATION 1.2 Indicators POWER: PAPER OUT: Page 2. Buzzer 3.Paper End Detector 4. Self-Test 5.Setting of DIP Switches Fig. 51 Loosening All 4 Screws Upper case Fig. 52 Pulling Out Wires Hooked to Control Panel MX-82or MX-82F/T Fig. 53 Construction of the Printer Fig. 54 Location of DIP Switches Fig. 55 Setting DIP Switches 5.1 Setting of DIP Switch No Table 2 Functions and Conditions of DIP Switch No Table 3 Character Size and Maximum Column Length 5.2 Setting of DIP Switch No Table 4 Functions and Conditions of DIP Switch No SW Pin No Function 5.3 Coding Tables Table 6 International Character Sets 5.4 Setting Sequence of Functional Specifications 1/8 inch ESC0c 4ESC0 inch Page (7Power ON SI or - ESCSI print 0DC2 Fig. 59 Setting Skip-overPerforation Function 1. What is a Dot Matrix Printer Fig. 61 Formation of Character “E” Fig. 62 Line Spacing 2. Definitions of Some Terms Often Used 3. Control Codes in the Text Mode 3.1 Print action codes 3.2Paper formatting codes ESC D + Page Page (5)ESC (6)ESC2 ESC B + ESC C (12)ESC 3.3Character designation codes PRINT1 AE(CDEFGH1 PRINT1 OBCDEF’GH SJKLMNOP PRINT1 [PRINT] ABCDEF WI JKL [PRINT] ABCDEFG H I JKL ABCDEFG JKLMN ESC E LPR INTI CIBCDEFGHI [PRINT] ABCDEFGH (8)ESC F 3.4Other codes BEL (7) NUL (8)ESC K (9) ESC L 4. Control Codes in the Bit Image Mode 4.1 Normal-densitybit image mode setting by ESC K + nl + nz Page 4.2 Dual-densitybit imagemode setting by ESC L + nl + nz 4.3 Relationship between data and dot wires Fin. 63 Relationship between Data and Dot Wires 4.4 How to obtain nl and n2 Fig. 64 Data Transfer Sequence in Bit Image Mode 4.5 Programming examples Fig. 65 Example of Graphic Pattern Formation Page Fig. 66 Normal-Densityand Dual-DensityModes Fig. 67 Examples of Bit Image Printing Fig. 68 Expressions of Brightness MAINTENANCE Print Head Print Head Unit , Terminal Board Head Lock Lever Head Connector SPECIFICATIONS SPECIFICATIONS (continued) APPENDIX Construction of MX-82and MX-82F/T Page 1.3 Power circuit 1.4 Printer initialization Fig. A1 -2Driver Circuit Diagram APPENDIX 2 Parallel Interface Page Page Page Page APPENDIX 4 Character Fonts Page liiiil Page APPENDIX 5 Control Codes Page sl+NsHu SEKI CQLTR EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC. (LA) Ca EPSON DEUTSCHIAND GMBH