Epson 420i User Manual
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Epson 420i User Manual

Epson 420i User Manual

High speed business printer
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PEED
HIGH S
PRINTER
BUSINESS
USER'S
GUIDE
EPSON AMERICA INC. SERVICE DIVISION

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Summary of Contents for Epson 420i

  • Page 1 PEED HIGH S PRINTER BUSINESS USER’S GUIDE EPSON AMERICA INC. SERVICE DIVISION...
  • Page 2 EPSON 420i HIGH SPEED BUSINESS PRINTER Epson America, Inc. Computer Products Division 2780 Lomita Blvd. Torrance, CA 90505 (213) 539-9140...
  • Page 3 Subpart J of Part 15 of FCC Rules. Only com- puters certified to comply with the Class B limits may be attached to this printer. Operation with noncertified computers is likely to result in interference to radio and TV reception.”...
  • Page 4 INTRODUCTION The Epson 420i is a high speed business printer which is usable with almost all commer- cial software, including word processing and graphics programs. By changing one switch on the back of the printer, either the Epson Printer mode or the IBM Graphics Printer mode is selectable.

  • Page 5: Precautions For Use

    Do not perform printing without the ribbon cassette and paper properly installed. EPSON reserves the right to change the contents as stated herein at any time and without notice. Although every effort has been made to insure that the contents as stated herein are complete and without error, EPSON cannot be responsible for any damage that may occur should this not be the case.

  • Page 6: Table Of Contents

    CONTENTS OUTLINE SWITCHES AND LAMPS REPLACEMENT OF THE RIBBON CASSETTE PAPER SETTING MAIN FUNCTIONS PARALLEL INTERFACE SERIAL INTERFACE DIP SWITCH SETTING CODE TABLE CONTROL CODE SUMMARY PRINT MODE FLOWCHART CONTROL CODE EXPLANATION PROGRAM EXAMPLES ... APPENDIX ............... .

  • Page 7: Outline

    Any one of 17 fonts may be selected from the five available print modes. Each font may be used exclusively or intermixed within any given line. When a mode change is indicated, data already input is printed in the mode first selected, the printer skips a few spaces, changes mdoes, and then receives new data.
  • Page 8 Detailed Summary of Character Fonts...
  • Page 9 Paper Feed Function and Form Width Pin feed method (form width may vary) 5”-15.5” Friction feed method 7. Line Feed Pitch Minimum 1/180” 8. Line Feed Speed 60 lines/second - when 6 lines/inch is selected 75 lines/second - when 7.5 lines/inch is selected 9.

  • Page 10: Switches And Lamps

    Pressing this switch selects either ON-LINE (green indicator on) or OFF-LINE (green indicator off) state. If in the OFF-LINE state, the printer outputs a busy signal. The print-head returns to the home position when entering the ON-LINE state from the OFF-LINE state.
  • Page 11 Lights up when power is on. Blinks if an error has been generated. 10. ON-LINE Lamp (Green) Data can be input when the printer is the ON-LINE state. The ON-LINE lamp is lit when the printer is ON-LINE, off when the printer is OFF-LINE. When the printer is OFF- LINE, a BUSY signal is output by the printer.

  • Page 12: Replacement Of The Ribbon Cassette

    RIBBON CASSETTE REPLACEMENT Installing the Ribbon Cassette 1. Open the printer cover and push the paper pressure bar toward the platen as shown in Fig. 1. Fig. 1...
  • Page 13 2. Set the head adjustment lever all the way forward. This lever may be moved easily by pushing it outward. 3. To attach the ribbon cassette to the printer, hold the ribbon cassette knobs in both hands and press the ribbon into position between the ribbon mask and the printhead.

  • Page 14: Removing The Ribbon Cassette

    Removing the Ribbon Cassette 1. Push the paper pressure bar towards the platen side. Pull the head adjustment lever forward. 2. As shown in Fig. 6, hold the ribbon cassette in both hands and pull the ribbon cassette upward. Fig. 5 Fig.

  • Page 15: Paper Setting

    2. Bottom feed (tractor type)-used for fan-fold, multiple copy sheets Rear Feed Tractor Paper Setting 1. Attach the paper rack to the rear of the printer by inserting it into the two holes located there, as shown in Fig. 8. Connect the ground wire. It is located between the paper rack and the power cable receptacle’s right-hand screw (shown in Fig.
  • Page 16 “PIN FEED.” (The form is free to move.) Fig. 9 3. Insert the paper into the back of the printer following the paper feed path 1 as shown in Fig. 7. Fig. 10 4.
  • Page 17 5. Open both tractor lids, adjust the form holes so they match the tractor pins, and then close the tractor lids. 6. Determine the proper horizontal positions of the tractors, and then pull the tractor lock lever forward to lock it into this position. 7.
  • Page 18 3. Move the tractor lock lever upward. (Fig. 11) 4. Perform steps 5-8 for the rear feed tractor type (path 1). 5. Move the side stoppers, located at the bottom of the printer at the paper insertion opening, to match the width of the paper to be used.

  • Page 19: Main Functions

    Detection Functions 1. Cover Switch The printer cover open/close detection switch puts the printer in the OFF-LINE state. It outputs a BUSY signal when the cover is opened. If the cover is opened during printing, printing is terminated after the current line is finished, and the OFF-LINE state is entered.

  • Page 20: Self Test Printing

    ON-LINE state only after the printer cover is closed and the RESET or ON-LINE switch is pressed. The self test print examples in the two modes (Epson Printer and IBM Graphics Printer) are shown on pages 15 and 16.
  • Page 21 SELF TEST PRINT EXAMPLE (EPSON MODE)

  • Page 23: Printhead Protection

    The double-strike process requires 2 passes of the printhead. Example: (STANDARD) Buffer This printer is equipped with an 18K-byte communication buffer which allows the reception of data during printing. Thus, even for large data transfers the computer is free to perform other tasks. Printhead Protection During high-density printing, a heat detector within the printhead protects the coils from damage due to overheating, by reducing print speed.

  • Page 24: Parallel Interface

    LOW and then HIGH again, the printer is initialized. 2. Signals from the Printer * BUSY This signal shows that the printer is in the BUSY state. When it is HIGH, data cannot be received. The following are conditions for which a HIGH BUSY signal is output:...
  • Page 25 (d) When the printer is in the OFF-LINE state. (At this time, the ON-LINE lamp is not lit: 1) If the printer cover is open; 2) paper supply is depleted or P.EMPTY lamp is lit; 3) an error is detected or the POWER Lamp is blinking;...
  • Page 26 2. Input / Output Conditions (a) Input Signals • INITIAL signal and STROBE signal (b) Output Signals • BUSY, ACK, ERROR, P.EMP signals. 3. Signal Cable Length The maximum length is 2 meters. All the signal lines should be run as twisted pairs with the GND lines.

  • Page 27: Timing Chart

    Timing Chart (a) Data input (b) Initialization DIP Swtich Setting The parallel interface is selected when DIP switches 1-1 and 1-2 are set as follows:...

  • Page 28: Serial Interface

    • If CD is to be used, cut J1 and connect a jumper at J4. Note 2: RTS and CTS are connected within the printer. If CTS is to be used, cut J3 and connect a jumper at J6. CAUTION: Changes in jumper connections should only be made by an authorized...
  • Page 29 Employed for the X-ON/X-OFF and ETX/ACK control. * RTS (REQUEST TO SEND) On (SPACE) state is continuously output. *SRTS This is a handshaking signal representing the printer’s BUSY state. OFF: BUSY ON: READY * DTR (DATA TERMINAL READY) This signal controls the state of the modem.
  • Page 30 When the printer is in the paper empty state or the cover has been opened, the DTR line goes OFF. The SRTS line output is identical to the DTR output. The printer can receive up to 4K bytes more after the DTR line goes OFF.

  • Page 31: Baud Rate

    3. ETXlACK Protocol The printer sends an ACK (O6HEX) to the computer in response to the data block separated by ETX (03HEX) which was sent by the computer. If the communication buffer space goes below 4K bytes, ACK is not sent. If the buffer space is more than 4K bytes, ACK is sent through the TR line.

  • Page 32: Dip Switch Setting

    DIP SWITCH SETTING The Epson 420i has two banks of eight DIP switches located on the back of the printer next to the interface connectors. The switch banks are labeled 1 and 2, with the in- dividual switches in each bank labeled from 1 to 8. To identify a particular switch we use a two part number consisting of the bank number followed by the switch number.
  • Page 33 DIP Switch Bank 2 This bank of switches selects some of the other features of the Epson 420i. These switches may be left in the OFF position as they come from the factory, or you may wish to change some of the switch settings to select different features. First you must decide if you want to use the Epson FX mode or the IBM Graphics Printer mode, determined by Switch 2-4.
  • Page 34 Select operating mode Note: Switch 2-4 changes several functions of the printer. See the differences be- tween the Epson Printer mode and the IBM Graphics Printer mode (page 36 .) * International Character Set Selection Note: Switch 2-8 is not used.

  • Page 35: International Characters

    The international character set selection does not become valid until the printer is turned ON once again. The table below shows the international characters: International Characters...

  • Page 36: Code Table

    CODE TABLE The control code tables for the Epson and IBM (character set 1 and 2) modes are shown below. CODE TABLE (EPSON MODE)
  • Page 37 CODE TABLE (IBM CHARACTER SET 1)
  • Page 38 CODE TABLE (IBM CHARACTER SET 2) Note: Encircled characters are selected by the DIP switches.

  • Page 39: Control Code Summary

    CONTROL CODE SUMMARY CATEGORY ITEM PRINT COMMANDS CHARACTER DESIGNATIONS CHARACTER FORMAT DESIGNATIONS DOUBLE-WIDTH MODE SYMBOLS HEX (DECIMAL) CODE FUNCTION...
  • Page 41 Relationship among the font, bold, double-strike and double-width functions is shown in the table below. 0: Can be used simultaneously The bold and double-strike modes may not be entered simultaneously. The last mode input has priority. In all print modes, the double-width mode may be used simultaneously with the bold or double-strike print modes.
  • Page 42 Differences between the Epson Printer mode and the IBM Graphics Printer mode Selecting one of the two mode (Epson Printer or IBM Graphics Printer mode) changes several things about the way the Epson 420i operates. The following functions change when you change the setting of Switch 2-4.

  • Page 43: Print Mode Flowchart

    PRINT MODE FLOWCHART * 16 CPI refers to condensed printing Note: 1) Italic print mode is set by and terminated by 2) This flow chart is valid only when the MODE dial switch is set to ‘0’. If any other is selected, the software designations of the above are ignored.

  • Page 44: Control Code Explanation

    0 [ n [ 255.n is a binary 8-bit code. Input of this code results in a n/180 inch paper- feed after printing. This line-feed value is not stored within the printer. This starting position of the next line is at the right side of the line printed previously.
  • Page 45 Character Designation Commands (1B, 50)H (27, 80)D, (9B, D0)H (155, 208)D Input of this code selects the 10 CPI pica print mode. (1B, 4D)H (27, 77)D, (9B, CD)H (155, 205)D Input of this code selects the 12 CPI elite print mode. (0F)H (15)D, (8F)H (143)D Input of this code selects the 16 CPI standard condensed print mode (1B, 0F)H (27, 15)D, (9B, 8F)H (155, 143)D...
  • Page 46 (1B, 21, n)H (27, 33, n)F This code allows you to select multiple print styles (i.e., pica-italic-underlined) with one command. The value of n determines the style selected. To determine a value of n, add the values given for the print styles that you want to use from the table below.
  • Page 47 This code terminates italic print mode. (1B,36)H (27,54)D (IBM mode only) In the IBM Graphics Printer mode, this command selects the IBM Graphics Printer character set 2 which includes characters not contained in character set 1. (1B,37)H (27,55)D (IBM mode only) In the IBM Graphics Printer mode, this command selects the IBM Graphics Printer character set 1.
  • Page 48 (14)H (20)D, (94)H (148)D This code terminates the double-width print mode (1B, 57, n)H (27, 87, n)D, (9B, D7, n)H (155, 215, n)D This code is a double-width print mode code that is not terminated by the line-feed. This code clears them mode. n = (01) or (31) n = (00) or (30) Graphic Printing Commands...
  • Page 49 (1B, 6B, n1, n2)H (27,107, n1, n2)D, (9B, EB, n1, n2)H (155, 235, n1, n2)D This code selects high density graphic mode. The maximum number of vertical dots is 16 and the maximum of horizontal dots is 1632. The n1 and n2 are binary numbers that display the graphic data number.

  • Page 50: Horizontal Tab Commands

    (1B, 5A, n1, n2)H (27, 90, n1, n2)D This code prints quadruple-density dot graphics at 240 dots per inch. The values of n1 and n2 define the number of bytes of data according to the formula n1 + n2*256. Each byte of data controls the printhead pins in one vertical row of dots. The maximum number of bytes of data is 3264.

  • Page 51: Vertical Tab Commands

    (1B, 6C, n)H (27,108, n)D, (9B, EC, n)H (155, 236, n)D This code sets the left margin, The n selects the column with the present character width as the base. This code is ignored if the value of n exceeds a single line. This code clears the print data input already and the horizontal tabs..
  • Page 52 This command must be followed by the the selected line spacing. In the Epson Printer mode, this command sets the line spacing to n/60 inch. (1B, 2E)H (27, 46, n)D This code sets the line spacing for subsequent line feed commands to n/120 inch.
  • Page 53 In the Epson Printer mode, this code sets the eighth data bit to 1. (1B, 23)H (27, 35)D In the Epson Printer mode, this command cancels control of the eighth data bit set by either the set eighth-bit or clear eighth-bit command.

  • Page 54: Buzzer Command

    International Character Set Command 6 1 . (1B, 52, n)H (27, 82, n)D In the Epson Printer mode, this command selects from one of the 8 international character sets as shown in the table below. Buzzer Command (07)H (07)D, (87)H (135)D This code causes the buzzer to sound for approximately 1/3 second.
  • Page 55 This code turns the paper-out sensor off and allows you to print to the bottom of single sheets of paper. (1B, 39)H (17, 57)D This code turns the paper-out sensor on so that it will report when the printer runs out of paper. This is the default condition. Selects unidirectional printing...

  • Page 56: Program Examples

    PROGRAM EXAMPLES...
  • Page 61 1 1 . Termination of condensed 1 3 . Subscript 1 4 . Termination of superscript/subscript Refer to 13.
  • Page 62 1 5 . Elite, double-strike, italic Bold 1 7 . Termination of bold Refer to 16.
  • Page 63 Double-strike Termination of Double-strike 1 9 . Refer to 18.
  • Page 64 High quality High quality ON/OFF...
  • Page 65 2 2 . Italic 2 3 . Termination of Italic Refer to 22.
  • Page 66 2 4 . IBM character Set 1 IBM character Set 2 2 5 .
  • Page 67 Double width 2 7 . Double-width Refer to 26. Termination of double-width 2 6 . Refer to 26. Double width...
  • Page 68 3 0 . Standard graphic Double-density graphic High density graphic...
  • Page 69 Selected density dot graphics...
  • Page 70 High-speed, double-density dot graphics Quadruple-density dot graphics...
  • Page 71 Horizontal tab setting 3 6 . 3 7 . Horizontal tab Right margin...
  • Page 72 Page length in lines 4 0 . 4 1 . Page length in inches Refer to 3. Vertical tab setting Refer to 4.
  • Page 73 Channel vertical tab setting 4 3 . Channel selection of vertical tab Refer to 43...
  • Page 74 1/8 inch line feed 7/60 inch line feed 1/6 inch line feed...
  • Page 76 n/120 line spacing...
  • Page 77 Underline 5 2 . Buffer clear 5 3 . Back space...
  • Page 78 8th bit 0 (Epson only) 5 4 . 8th bit 1 (Epson only)
  • Page 79 8th bit valid (Epson only) skip-over perforation 5 7 .
  • Page 81 Termination of skip-over perforation Refer to 57. Data delete 6 0 . Home positioning International character (Epson only)
  • Page 82 Buzzer Reset...

  • Page 83: Appendix

    There is a function of printing input data from a computer in hexadeciamal codes. Therefore, it is possible to check the data the printer has received. To perform this function, keep pushing both the LF and the FF switches at power-on till the initializa- tion operation ends.

  • Page 84: Limited Warranty

    Epson product, are excluded from coverage under this warranty. This warranty does not apply if the Epson label or logo, or the rating label or serial number, has been removed from your Epson product, or if, in the sole opinion of Epson, your Epson product has been damaged...
  • Page 85 EPSON EPSON AMERICA INC.

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