M X - 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 ........................................................................................................... 2 1. Unpacking & Set-up of MX-85 ............................................................................... 2 1.1. Unpacking ............................................................................................................ 2 1.2.
LIST OF FIGURES Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 12 Fig. 13 Fig. 14 Fig. 15 Fig. 16 Fig. 17 Fig. 18 Fig. 19 Fig. 20 Fig. 21 Fig. 22 MX-85 Dot Matrix Printer ........................................................................... 1 Contents of Carton.. .................................................................................... 3 Removal of Printer Cover ...........................................................................
LIST OF TABLES Table Table Table Table Table Table Table 1 2 3 4 5 6 7 Function and Conditions of DIP Switch B ............................................. Function and Conditions of DIP Switch A ............................................. Baud Rate Selection.. .............................................................................. ASCII Code Table Selection.. .................................................................. BAUDOT Code Table 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. Transmission Code: ASCII and Baudot - 45.5 to 9600 baud 5. Buffer size: 4K Bytes 6. High quality and reliability 7. High density print quality - 9x7 Matrix 8.
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. (3) Grasp the MX-85 by, its underside and lift straight out with ‘packing material attached. (4) Place the printer on a flat surface. (5) Carefully remove packing material. (6) Remove the vinyl cover. 1.2.
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. 6. Filter Circuit Board (Y4252O400000) 4. Roll Paper Holder 3. Operation Manual 1. MX-85 Dot Matrix Pritner 5. AC Power Cord Fig.
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. 3. The MX-85 should not be located in the vicinity of noise generating equipment or heat generating equipment. 4.
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. They are necessary to prevent damage to the print mechanism which may be caused by shock or vibration during transportation. Right Side of the Printer Lower Case Shipping Screws Fig. 4 Removal of Shipping Screws 1.8.
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. 5. Turn the Printer right side up. Carefully lift the upper case from the left side. When the case is partially raised, reach in and pull control panel cable loose.
Upper Case Lead Wire Fig. 7 Removing Wires Connected to Control Panel 2. Construction and Location of the MX-85 Components At this time, the following main components of the MX-85 Printer and their respective locations can be observed: 1. 2. 3. 4. 5.
Construction of the Printer Controller Transformer & Filter Circuit Board Printer Machanism Control Panel 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. 3.2. Setting DIP switches - SW-A and SW-B 1. With the top cover removed, observe the SMDP Board and locate the two switches. They are equipped with plastic dust covers which pull off. Remove them and set aside for later replacement.
Fig. 10 Table 1 Pin No. Setting DIP Swtiches Functions and Conditions of DIP Switch B Function Off On B1 ON B2 Baud Rate B3 See OFF Table 3 ON B4 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. 6. Set Auto Feed if required. This is necessary if the host system does not transmit line feed control code. Details of the coding structures are contained in Appendix A for ASCII and Appendix B for Baudot.
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. This is accomplished by: 1. Disconnecting the Mechanism Cable and the AC cable. 2. Removing the six (6) screws on the SMDP Board and the two (2) screws located in the heat sink on the right side of the board. 3.
Jumper OFF Jumper ON Fig.
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. This change will necessitate a change in the filter circuit board, so your MX-85 supplier should be notified.
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. 5. Guide the four (4) tabs on the cartridge into the mechanism side frames. 6. Press down on both ends of the cartridge to firmly seat it. 7.
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. 1. Set the paper holder behind the MX-85 and locate the rear rubber feet of the Printer in the forward holes of the paper holder. Failure to do this will result in severe paper-tracking problems.
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. 4. Pull the print scale forward and push the paper release to the rear. 5. Mount the roil paper onto the paper holder. 6. Insert the paper into the slot at the rear of the platen on the MX-85. 7.
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. Move forward to widen gap. Move rearward to narrow gap. This lever can also be used to compensate for decreased print density due to ribbon wear after extended usage.
Head Adjusting Lever (Side View) Position of adjusting lever Paper Single-leaf paper Multi-copy paper sheets Set the lever to the 4th step. Set the lever to the 7th step. Fig.
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. “Paper-Out” indicator will be off. 1. LF/FF Functions 1. Depress the Line Feed (LF) button. Paper will be fed one line at a time while the switch is held depressed. 2. Depress the Form Feed (FF) button.
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. The test requires about 22 inches. 2. Turn’off power. 3. Turn on power while holding the LF button depressed. 4. The MX-85 will begin printing its test pattern.
Table 7 I Pin No. 1 2 3 4 5 7 11 20 23 25 25-pin EIA Connector Signal Name Chassis Ground TXD RXD RTS CTS Signal Ground Reverse Channel (REV) Data Term Rdy (DTR) TTY-RXD Return TTY-RXD Current Loop Input 4. Theory of Operation The data received by the MX-85 is stored in the 4K Byte Memory. Printing is initiated by the following means: 1. Receipt of the Carriage Return (CR) or Line Feed (LF) Control codes. 2. An excess of 80 characters (1 line) in the print buffer. 3.
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 Chan pin 11 = Mark (-V) Data Entry - Available until buffer full Indicators - “Paper Out” ON "Ready” OFF Buzzer - Sounds for 20 seconds Printing - Disabled NOTE: Buzzer will stop upon depression of LF or FF button. Both the paper empty and the low paper conditions call for replacement of the paper roll.
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. Tear off the Paper Fig.
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. 3. The interior of the Printer can be cleaned with denatured alcohol. The only user replaceable items are the cartridge ribbon and the print head. Cartridge ribbon replacement is covered in a previous section of this manual.
Print Head Unit Terminal Board Head Lock Lever Head Connector Be sure to hold this connectar firmly to pull the head cable out straight. Carriage A&embly (Side View) *Take hold of the cable at the point indicated by arrows and apply force in either of the directions indicated by arrow to push in or pull out the head cable. Fig.
Appendix A ASCII Code Table b1 (low order bit) is normally transmitted first.
Appendix B Baudot Code Table -28-
Appendix C Character Fonts (Hex. Code) AF NOTE: Numbers represent Hex.
NOTE: Numbers represent Hex. Code.
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.
