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MX-8 5 DOT MATRIX PRINTER Operation Manual P8290062-1.
Copyright © 1982 by EPSON Shinshu Seiki Co., Ltd. Nagano, Japan “All rights reserved” *The contents of this manual are subject to change without notice.
TABLE OF CONTENTS INTRODUCTlON ........................................................................................................ 1 INSTALLATlON ....................................................................................................
LIST OF FIGURES Fig. 1 MX-85 Dot Matrix Printer ........................................................................... 1 Fig. 2 Contents of Carton.. .................................................................................... 3 Fig. 3 Removal of Printer Cover .
LIST OF TABLES Table 1 Function and Conditions of DIP Switch B ............................................. 10 Table 2 Function and Conditions of DIP Switch A ............................................. 10 Table 3 Baud Rate Selection.. ............
INTRODUCTION The MX-85 Dot Matrix Printer is a highly versatile communication grade terminal printer, with the following features: 1. Print Speed: 80 CPS 2. Microprocessor controlled, logic seeking, bidirectional printing 3. Interface: Serial - RS-232C and 20 to 80 mA Current Loop 4.
INSTALLATION 1. Unpacking & Set-up of MX-85 Before removing the MX-85 from the carton, check the box for evidence of shipping damage. If such evidence is present, notify the carrier immediately. 1.1. Unpacking (1) Open carton. (2) Remove accessories; ribbon, manual, etc.
1.3. Contents of carton The Carton should contain the following: 1. MX-85 Printer 2. Cartridge Ribbon 3. Operation Manual 4. Roll Paper Holder 5. AC Power Cord 6. Filter Circuit Board If there is any evidence of damage or missing items, contact the vendor from whom the printer was purchased to report the details.
1.4. Operation site 1. The MX-85 should be installed on a flat, firm surface with adequate room to the rear to accommodate the roll paper holder and paper rewind device if so equipped. 2. Care should be exercised in locating the MX-85 in areas where it will not be exposed to direct sunlight or where the environment contains grease or dust.
Lower Case Shipping Screws 1.7. Removal of shipping screws 1. Turn the MX-85 upside down, exercising care so the paper release lever is not bent. 2. Remove the two (2) shipping screws from the lower case. NOTE: These shipping screws should be retained for use during reshipment of the MX-85.
Pull out Fig. 5 Removing Manual Paper Feed Knob 3. Turn the Printer upside down, observing caution with the paper roll release 4. Loosen the four (4) Phillips head screws located in the extreme corners of the bottom cover. NOTE: Placing tape over the holes will prevent accidental loss of the screws when the Printer is inverted.
Upper Case Lead Wire Fig. 7 Removing Wires Connected to Control Panel 2. Construction and Location of the MX-85 Com- ponents At this time, the following main components of the MX-85 Printer and their respective locations can be observed: 1. Transformer & Filter Circuit Board 2.
Construction of the Printer Controller Printer Machanism Control Panel Transformer & Filter Circuit Board Transformer & Filter Circuit Board Controller Printer Mechanism MX-85 Dot Matrix Printer SMDP Board (Driver Circuit Board) Connector (male and female) SMCT Board (Control Circuit Board) Spacer Controller Fig.
3. Setting of DIP Switches and Jumpers 3.1. Location of DIP switches and jumpers In order to suit each user’s specific requirements, there are two (2) DIP (Dual In-Line Pin) switches located on the SMDP Board and sixteen (16) jumpers located on the SMCT Board.
Fig. 10 Setting DIP Swtiches Table 1 Functions and Conditions of DIP Switch B Pin No. Function Off On Factory-set B1 O N B 2 See OFF B3 Baud Rate Table 3 O N B 4 OFF Table 2 Functions and Conditions of DIP Switch A Pin No.
4. Now using Table 2, select your transmission code: ASCII or Baudot. A. If ASCII is selected, refer to Table 4 for word length setting and parity control. B. If Baudot is selected, refer to Table 5 for selection of correct Baudot code. 5. Set Line Spacing to desired position.
3.3. Setting of jumpers Your application may require the removal or installation of jumpers of the SMCT Board. Before continuing, consult Table 6 which outlines the function and factory-set condition of each jumper. In order to access the SMCT Board it is necessary to remove the SMDP Board.
Jumper OFF Jumper ON Fig. 11 Jumpers on the SMCT Board -13-.
4. Power Supply Verify that the power supply is set correctly for your application. Check to see that the wire connected to the filter board is securely fastened to the correct voltage position. If it is necessary to change the voltage, use a flat blade screwdriver to loosen the existing connection and reconnect to the desired voltage.
5. Cartridge Ribbon Installation 1. Position the Printer with the logo facing you. 2. Lift the Printer cover. 3. Be sure the print scale is pushed to the rear, against the platen. 4. Remove the ribbon from its box and turn the knob counterclockwise to remove any slack.
Fig. 14 Cartridge Ribbon Setting -Ribbon Ribbon Mask Incorrect Incorrect Correct Fig. 15 Examples of Correct and Incorrect Ribbon Setting 6. Paper Holder Installation The following steps should be performed with the power off.
2. Plug jack type connector, which is connected to the “Low Paper” sensor, into the mating connector located alongside of the 25-pin EIA connector on the rear of the MX-85. 3. Lift the printer cover and slide the print head to approximately the center of the printer.
Roll Paper Fig. 17 Loading of Rool Paper (2) Manual Paper Feed Knob Fig. 18 Loading of Roll Paper (3) 7. Gap Adjustment It is possible to adjust the gap between the print head and platen to accommodate various thicknesses of form and print density. The head adjusting lever is located on the left side frame of the print mechanism.
Head Adjusting Lever (Side View) Paper Position of adjusting lever Single-leaf paper Multi-copy paper sheets Set the lever to the 4th step. Set the lever to the 7th step.
OPERATION Power On 1. Plug in AC power cord. 2. Turn on the Printer - switch located to the rear on the right side of the Printer. 1) Buzzer will sound. 2) Print head will return to the left side of the Printer. 3) The “Power”, “Ready” and “On-Line” indicators should be lit on the control panel.
2. Self -Test The MX-85 has a self-test routine programmed into the Controller. It is useful to check the operation of the print head and the print mechanism (ribbon, motors, belt, etc.). The input connector is not checked with this test. 1. Be sure there is an adequate supply of paper in the Printer.
Table 7 25-pin EIA Connector I Pin No. Signal Name 1 Chassis Ground 2 TXD 3 RXD 4 RTS 5 CTS 7 Signal Ground 11 Reverse Channel (REV) 20 Data Term Rdy (DTR) 23 TTY-RXD Return 25 TTY-RXD Current Loop Input 4. Theory of Operation The data received by the MX-85 is stored in the 4K Byte Memory.
4.2. Paper empty The paper empty switch located beneath the platen will activate when the paper runs out. When activated, the following conditions will take place: Status - DTR pin 20 = Mark (-V) Rev .
5. Paper Tear-Off 1. To tear off the last message printed, depress the FF button to position the paper. 2. Hold down the printer cover while tearing the paper. 3. Check to see that the paper is against the platen and that the paper has not shifted. Reposition if necessary.
MAINTENANCE AND PARTS REPLACEMENT Preventative Maintenance of the MX-85 consists mainly of cleaning. 1. Paper dust and particles should be cleared away with a soft brush. 2. The exterior of the Printer can be cleaned with a mild detergent and water solution.
Head Lock Lever Carriage A&embly Print Head Unit Terminal Board Head Connector Be sure to hold this con- nectar firmly to pull the head cable out straight. (Side View) *Take hold of the cable at the point indicated by arrows force in and apply either of the directions indicated by arrow to push in or pull out the head cable.
Appendix A ASCII Code Table b 1 (low order bit) is normally transmitted first. -27 -.
Appendix B Baudot Code Table -28 -.
Appendix C Character Fonts (Hex. Code) A F NOTE: Numbers represent Hex. -29 -.
NOTE: Numbers represent Hex. Code. -30 -.
FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT “This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio and tele vision reception.
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