User manual EPSON LQ-950

[. . . ] User's Manual EPSON ® Y45499114003 EPSON LQ-850/950/1050 ® User's Guide FCC COMPLIANCE STATEMENT FOR AMERICAN USERS 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 television reception. It has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Subpart J of part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient the receiving antenna - Relocate the printer with respect to the receiver - Plug the printer into a different outlet so that the printer and receiver are on different branch circuits. [. . . ] Remember that in Letter Quality and proportional, as in draft, you cannot place dots in adjacent columns. There must be an empty dot position to the left and right of each dot that prints. 4-28 User-Defined Characters Superscripts and subscripts You can also create superscript and subscript user-defined characters. Just as Letter Quality characters are defined when the Letter Quality mode is selected, super/subscript characters are created when either superscript or subscript is selected. These super/subscript characters can be used either as superscripts or as subscripts. The characters are exactly the same; it is only their placement that differs. The difference between super/subscript characters and regular characters is that they are smaller. They are a maximum of 16 dots high and their width in dot columns is shown in the table below: dl (maximum) Draft Letter Quality Proportional I 7 23 23 d0 + dl + d2 (maximum) 12 36 I 42 I Since super/subscript characters are smaller, they don't require as much information when you define them. When you define super/subscript characters, you need only two bytes of data for each vertical row of dots. Design grids for these characters are shown in the figure below. Draft pica Letter Quality and Proportional 4-29 User-Defined Characters Mixing print styles Each of the three user-defined character modes (draft, Letter Quality, and proportional) can be used in combination with most of the LQ's various print styles. For instance, emphasized works with user-defined characters. The characters you design are enhanced to give this printing effect. Mixing the three types of user-defined characters is not permitted. If, for example, you select draft and define some characters, then select proportional and define some more, the first character definitions will be destroyed. Only one type of character definition may be stored in RAM at any time. If you define characters in one mode, then switch to another mode and select the user-defined character set, the command will be ignored and nothing will print. The user-defined character definitions, however, remain unaffected. If you switch back to the mode in which they were defined, you can then select and print them. Keep in mind that user-defined characters are stored in RAM, which is not permanent. Whenever the printer power is turned off, or the printer is intialized with the (INIT) signal, the user-defined characters are lost. (Some computers do this each time BASIC is loaded. ) ESC @ does not destroy user-defined characters. 4-30 Replacing the Ribbon Transporting the Printer Cleaning the Printer 5-2 5-4 5-6 Replacing the Ribbon When your printing becomes too faint you need to replace the ribbon. Use the following Epson replacement ribbons: Printer LQ-850 Standard ribbon Film ribbon LQ-950 LQ-1050 #7753 #7767 #7754 #7768 #7769 #7770 To replace the ribbon, turn off the power to the printer and remove the printer cover. If the printer has been used recently, the print head may be hot. [. . . ] Reset Returning a printer to its defaults, with either a command, an INIT signal, or by turning the printer off and on. Self test A method of checking the operation of the printer. When the self test is turned on, the printer prints the characters that are stored in its ROM. Serial interface An interface is the connection between the computer and the printer. [. . . ]