User manual EPSON MX-85

[. . . ] MX-85 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unpacking & Set-up of MX-85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] When the case is partially raised, reach in and pull control panel cable loose. Set the cover safely aside. Phillips Head #2 Screwdriver Fig. 6 Loosening All 4 Screws -6- 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. Transformer & Filter Circuit Board SMDP Board - Top SMCT Board - Bottom Printer Mechanism - M-3310 Control Panel -7- 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) Spacer SMCT Board (Control Circuit Board) Controller Fig. 8 Construction of the Printer -8- 3. Setting of DIP Switches and Jumpers 3. 1. Table 3 Baud Rate Selection Note: 1 = ON Table 4 ASCII Code Table Selection Pin No. A2 A3 A4 Function Data Length Parity Check Parity off 8 bit Enable Even On 7 bit Disable Odd Factory-set ON ON ON Table 5 SW A2 ON OFF ON BAUDOT Code Table Selection SW A4 SW A3 CODE TABLE CCITT #2 CCllT #2 AMERICAN WU/TELEX ON OFF OFF ON ON ON -11- 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. Disconnecting the Mechanism Cable and the AC cable. 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. Lifting the Board from the rear center, in the connector area, to avoid damage. NOTE: Any changes in this area should be performed by an experienced technician. Table 6 Function and Conditions of Jumpers Jumper J1 J2 J3 J4 Function Not used ON RS-232C OFF Level Both ON = Polar Both OFF = Neutral OFF ON Factory-set OFF Note 1 Current Loop Level ON OFF OFF J5 J6 J7 OFF OFF Not used Not used OFF J8 J9 Current Loop (USA Version) Both are ON when not using RTS and CTS ON when using CTS J10 J11 J12 J13 J14 J15 J16 ON ON ON OFF ON when using RTS 80 60 40 20 mA mA mA mA Current Current Current Current Loop Loop Loop Loop OFF Note 2 OFF OFF OFF OFF Note 1: Select either J2 or J3. Do not connect 2 or more. - 12- 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. [. . . ] 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 replacement CAUTION: The print head runs very hot under normal operating conditions. Allow time for it to cool before attempting replacement. [. . . ]