User’s Guide NPD6761-01 EN
LQ-780/LQ-780N User’s Guide Copyrights and Trademarks No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation. The information contained herein is designed only for use with this Epson printer. Epson is not responsible for any use of this information as applied to other printers.
LQ-780/LQ-780N User’s Guide Contents About This Manual Where to Find Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Descriptions Used in this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Operating System Versions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LQ-780/LQ-780N User’s Guide Loading Continuous Paper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Positioning the continuous paper supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Loading continuous paper with the tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Loading Single Sheets. . . . . . . . . . . . . . . . . . .
LQ-780/LQ-780N User’s Guide Setting for the clients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Cancelling Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Uninstalling the Printer Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LQ-780/LQ-780N User’s Guide Chapter 6 Options and Consumables Replacing the Ribbon Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 Genuine Epson ribbon cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 Replacing the ribbon cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LQ-780/LQ-780N User’s Guide About This Manual Where to Find Information The following manuals are supplied with your Epson printer. Start Here (paper manual) Provides information on setting up the printer and installing the software. User’s Guide (this manual) Provides overall information and instructions on using the printer. Network Guide ( LQ-780N only) Provides network information on management and printer settings.
LQ-780/LQ-780N User’s Guide ® ® Microsoft® Windows® 7 operating system Microsoft® Windows Vista® operating system Microsoft® Windows® XP operating system Microsoft® Windows® XP Professional x64 Edition operating system Microsoft® Windows Server® 2022 operating system Microsoft® Windows Server® 2019 operating system Microsoft® Windows Server® 2016 operating system Microsoft® Windows Server® 2012 R2 operating system Microsoft® Windows Server® 2012 operating system Microsoft® Windows Server® 2008 R2 operatin
LQ-780/LQ-780N User’s Guide Safety Instructions Safety Instructions Warnings, Cautions, and Notes ! Warnings must be followed carefully to avoid bodily injury. ! Cautions must be observed to avoid damage to your equipment. Notes contain important information and useful tips on the operation of your printer. Hot Parts Caution Symbol This symbol is placed on the print head and other parts to indicate that they may be hot. Never touch those parts just after the printer has been used.
LQ-780/LQ-780N User’s Guide ❏ Do not place this product on a soft, unstable surface like a bed or a sofa, or a small, enclosed area, as this restricts ventilation. ❏ Do not block or cover the slots and openings in the printer’s cabinet, and do not insert objects through the slots. ❏ Leave adequate room around the printer for easy operation and maintenance. ❏ Place the printer where you can easily connect it to a network interface cable, if necessary (LQ-780N only).
LQ-780/LQ-780N User’s Guide ❏ Avoid electrical outlets controlled by wall switches or automatic timers. An interruption in power can erase information in the memory of your printer or computer. Also avoid outlets on the same circuit as large motors or other appliances that can cause voltage fluctuations. ❏ Use a grounded power outlet; do not use an adapter plug. ❏ If you plan to use a printer stand, follow these guidelines: - Use a stand that can support at least twice the weight of the printer.
LQ-780/LQ-780N User’s Guide When operating the printer ❏ Adjust only those controls that are covered in the user documentation. Improper adjustment of other controls may result in damage requiring extensive repair by a qualified technician. ❏ Whenever you turn off the printer, wait at least five seconds before turning it back on; otherwise, you may damage the printer. ❏ Do not turn off the printer while it is printing the self test.
LQ-780/LQ-780N User’s Guide ZICTA Type Approval for Users in Zambia See the following website to check the information for ZICTA Type Approval. https://support.epson.
LQ-780/LQ-780N User’s Guide Chapter 1 Printer Basics Printer Parts 1 printer cover Open this when replacing the ribbon cartridge or removing jammed paper. For your safety, printing cannot be performed if the printer cover is open, so make sure you close the printer cover when you are done. 2 power switch Turn the printer on or off. 3 tear off edge Use this to cut paper for continuous paper. 4 edge guide Guides the paper straight into the printer.
LQ-780/LQ-780N User’s Guide 1 parallel interface connector Connects the parallel interface cable. 2 USB port Connects a USB cable. 3 LAN port (LQ-780N only) Connects a LAN cable. 4 status sheet button (LQ-780N only) Press and hold this button for approximately three seconds to check the network status. 5 tractor unit Use this to feed continuous paper. 6 center paper support Place this in the middle of the sprockets to maintain the center of the continuous paper.
LQ-780/LQ-780N User’s Guide Control Panel Buttons and Lights Note: The control panel is designed to easily convey functions and operations. Single button operations: The Tear Off (o), LF/FF (d), Load/Eject (u), and Pause ( perform common paper operations. Button combinations: Activate [Menu] and [Reset] by using a combination of button operations. Functions mode: Activate [Font] and [Micro Adjust] by holding down the seconds.
LQ-780/LQ-780N 6 Feeds paper line by line when pressing shortly. LF/FF button (d) (Single button) 7 [Micro Adjust] (Functions mode) 8 User’s Guide Load/Eject button (u) (Single button) Ejects a single sheet or advances continuous paper to the next top-of-form position when held down. Hold down the button for three seconds, the printer enters the [Micro Adjust] mode. Then press the button d and u to adjust the top-of-form or tear off position.
LQ-780/LQ-780N User’s Guide Decoration label This product comes with a label that contains the light patterns for the control panel operation functions and links (QR codes) to the "Clearing a Paper Jam" and "Replacing the Ribbon Cartridge" web pages. Attach these links to easy-to-access locations if necessary. 1 Network settings notes Use this to enter notes regarding network settings such as the model name and IP address.
LQ-780/LQ-780N User’s Guide Example of label attachment position: Selecting a Font and Menu You can select one of the printer’s fonts and Menu (default settings) by using the buttons on the printer’s control panel, as described below. Note: ❏ You can select other fonts than the seven fonts on the control panel by selecting Others. Other fonts can be set in the Default Setting mode. See “Changing default settings” on page 25. This function is disabled when using the Windows driver.
LQ-780/LQ-780N = on, = off, Roman Script Sans Serif Others User’s Guide = flashing 3. Make sure that the desired font is selected. About Your Printer’s Default Settings The default settings control many printer functions. While you can often set these functions through your software or printer driver, you may sometimes need to change a default setting from the printer’s control panel using the Default Setting mode.
LQ-780/LQ-780N User’s Guide Item Setting / value *1 Packet mode Auto, Off Auto CR (IBM PPDS)*2 Off, On A.G.M.
LQ-780/LQ-780N User’s Guide Skip over perforation This feature is available only when continuous paper is selected as the paper source. When you turn on this feature, the printer provides a one-inch (25.4 mm) margin between the last line printed on one page and the first line printed on the next page. Because most application program margin settings override margin settings from the control panel, you should use this setting only if you cannot set your top and bottom margins using your application.
LQ-780/LQ-780N User’s Guide Software When you select ESC/P2 the printer operates in the EPSON ESC/P2 mode. When you select IBMPPDS, the printer emulates an IBM printer. 0 slash The zero character has a slash ( ) when this feature is turned on. It has no slash (0) when this feature is turned off. The slash allows you to easily distinguish between the uppercase letter O and a zero.
LQ-780/LQ-780N User’s Guide Auto CR (carriage return) This setting is available in the IBMPPDS emulation mode. When auto carriage return is on, each line feed (LF) code or ESC J code is accompanied by a carriage return code. This moves the print position to the beginning of the next line. A.G.M. (Alternate Graphic Mode) This setting is available only in the IBMPPDS emulation mode. When A.G.M. is on, the printer can use some advanced graphics commands like those available in the ESC/P2 mode.
LQ-780/LQ-780N User’s Guide Low-noise mode When this mode is set to On, the noise is reduced, but the printing speed is slower. Copy mode This setting allows you to set printing density. This mode can be set if the density is low when printing on copy paper. However, when On is selected, you can print at a higher density, but the printing speed will be slower. Select On when printing on copy paper.When Off is selected, you can print at normal density.
LQ-780/LQ-780N User’s Guide 3. If the language you want is not selected, press the Item d button until the printout indicates the language you want. Note: You cannot change the language by the Item u button. 4. Press the Set (o) button to select the desired language. The printer prints a message asking if you wish to print all of the current settings. Note: The language you select is also effective when you are entering the lock-out setting mode or bidirectional adjustment mode. 5.
LQ-780/LQ-780N User’s Guide Changing the lock-out mode setting The following table shows the basic function of each button in the lock-out setting mode. Button Basic function d button Selects the next menu parameter. u button Selects the previous menu parameter. o button Changes the value in the selected menu. You can select the printer functions to be locked while the lock-out mode is on according to your needs.
LQ-780/LQ-780N User’s Guide 4. Press the d button or the u button to select the menu parameters which you wish to change. Press the o button to scroll through the values within the selected parameter until you find the desired setting. After setting the selected parameter to the desired setting, you may continue to make changes to other parameters by pressing the d button or the u button. 5. Turn off the printer and exit the lock-out setting mode.
LQ-780/LQ-780N User’s Guide Chapter 2 Paper Handling Selecting a Paper Source Your printer can print on continuous paper, multipart forms (with one original and up to six copies), cards, labels, single sheets, envelopes, and roll paper. ! Caution: Do not use paper that is folded (except envelope flaps), creased, curled, torn, stained, or stamped. Always use new, clean paper that meets the paper specifications. See “Paper” on page 113 for more detailed information.
LQ-780/LQ-780N User’s Guide Paper path Paper source selection Single sheets *2 Sheet guide Manual Roll paper Roll paper holder (Option) Manual * 1 Continuous paper includes labels, multipart forms, and continuous forms with labels. * 2 Single sheets include envelopes, postcards, and single sheet multipart forms. Setting the paper release lever Set the paper release lever to select the paper-feeding method you want the printer to use.
LQ-780/LQ-780N User’s Guide Loading Continuous Paper You can load continuous paper from the built-in tractor unit. Note: See “Continuous paper” on page 113 for detailed specifications on continuous paper. Positioning the continuous paper supply When you load continuous paper, make sure to line up the paper supply with the tractor so the paper feeds smoothly into the printer as shown below.
LQ-780/LQ-780N User’s Guide Loading continuous paper with the tractor 1. Make sure that the paper release lever is set to the tractor feeding position. 2. Slide the edge guide all the way out. 3. Facing the back of the printer, release the sprocket lock levers by pushing them up.
LQ-780/LQ-780N User’s Guide 4. Open the sprocket covers. 5. Fit the first three holes of the continuous paper over the sprocket pins on both sides. Be sure to position your paper supply so that the printable side faces up. ! Caution: Make sure the first sheet of your continuous paper has a clean, straight edge so that it can feed smoothly into the printer. 6. Slide the center paper support to the middle of the two sprockets.
LQ-780/LQ-780N User’s Guide 7. Close the sprocket covers. 8. Position the left sprocket so that the sprocket pins are to the left of the arrow mark on the back of the printer. Then push down the lock lever to lock the sprocket in place. Note: Printing starts at the arrow mark on the back of the printer.The unprintable area is to the left of the arrow mark. 9. Slide the right sprocket to remove any slack in the paper. Then push down the sprocket lock lever to lock the sprocket in place.
LQ-780/LQ-780N User’s Guide 10. The printer is ready to start printing. When using continuous paper, you can use the tear off function to tear off printed pages and save the blank pages that are usually wasted between print jobs. For more information, see “Using the tear off function” on page 35. Note: Always make sure there is at least one more sheet than required; continuous paper may not feed properly if it is not fed through the sprockets.
LQ-780/LQ-780N User’s Guide ! Caution: Never use the tear off function to feed continuous paper with labels backward; they may come off their backing sheet and jam the printer. Using the Tear Off button Follow these steps to remove continuous paper using the Tear Off button: 1. After you finish printing, make sure that the Tear Off light is not flashing. Note: If the Tear Off light is flashing, the paper is in the tear off position.
LQ-780/LQ-780N User’s Guide Loading Single Sheets Your printer can print on single sheets of paper. See “Single sheets” on page 113 for detailed single sheet paper specifications. Note: If you load long paper (for example, legal size paper), leave enough space at the back of the printer so that the paper is not obstructed. Loading single sheets from the sheet guide Follow these steps to load single sheets from the sheet guide. 1.
LQ-780/LQ-780N User’s Guide 4. Slide the edge guide until it rests against the guide mark. * guide mark 5. While aligning the left side of a sheet of paper with the edge guide, insert it into the printer until it meets resistance. Be sure to load paper printable side up. After a few seconds, the printer automatically advances the paper to the loading position. The printer is ready to start printing. 6. Set the paper support according to the length of the paper so that it supports the paper.
LQ-780/LQ-780N User’s Guide Note: ❏ If the platen rotates but the printer does not load the paper, completely remove the paper and then insert it all the way into the printer again. ❏ If the paper feeds before you can adjust its position properly, increase the Manual feed wait time in the Default Setting mode. See “Changing default settings” on page 25 for more information. After printing a sheet, the printer ejects it onto the paper guide and the Paper Out and Pause lights come on.
LQ-780/LQ-780N User’s Guide Note: This printer automatically sets the distance between the print surface and the print head according to the thickness and number of sheets of paper, so you do not need to set the Head Gap. Labels You can use two types of labels: single-sheet and continuous forms. Do not use labels on shiny single sheet backing, because the backing sheet tends to slip and may not feed properly.
LQ-780/LQ-780N User’s Guide 1. At the back of your printer, tear off the last label form that has entered the printer. See the illustration below. 2. Press the LF/FF button to eject the last label form forward. ! Caution: Do not leave labels loaded in the printer between print jobs; they tend to curl and may come off their backing sheet and jam the printer when you resume printing.
LQ-780/LQ-780N User’s Guide from the sheet guide * guide mark ** top edge first and flap side down Postcards You can print on a variety of postcards by loading them the same way you load single sheets from the sheet guide. Follow these steps to load postcards: ! Caution: Use postcards only under normal operating conditions. 1. Make sure that your software settings keep the printing entirely within the printable area. See “Printable area” on page 119 for more information.
LQ-780/LQ-780N User’s Guide from the sheet guide * guide mark Switching Between Continuous Paper and Single Sheets When using the tractor, you can easily switch between continuous paper and single sheets (including envelopes or postcards) without removing the continuous paper from the tractor. Switching to single sheets Follow these steps to switch from continuous paper to single sheets: 1.
LQ-780/LQ-780N User’s Guide If the error buzzer sounds, there may still be paper on the paper path. Return the lever return to the tractor position and clear the remaining paper from the path. Now you can load single sheets from the sheet guide. See “Loading Single Sheets” on page 37 for more information. Switching to continuous paper Follow these steps to switch from single sheets to continuous paper: 1. If necessary, press the Load/Eject button to eject the last printed single sheet. 2.
LQ-780/LQ-780N User’s Guide Using the Micro Adjust Function The Micro Adjust function allows you to move the paper forward or backward in 0.141 mm (1/180 inch) increments so that you can make precise adjustments to the top-of-form and tear off positions. Adjusting the tear off position If your paper perforation is not aligned with the tear off edge, you can use the Micro Adjust function to move the perforation to the tear off position.
LQ-780/LQ-780N User’s Guide 5. Press the Pause button to exit the Micro Adjust mode. When you resume printing, the printer automatically feeds the paper back to the top-of-form position and begins printing. Adjusting the top-of-form position The top-of-form position is the position on the page where the printer starts printing. If your printing appears too high or low on the page, you can use the Micro Adjust function to adjust the top-of-form position.
LQ-780/LQ-780N User’s Guide Chapter 3 Printer Software About Your Printer Software The Epson software includes the printer driver software and EPSON Status Monitor 3. The printer driver is software that allows your computer to control the printer. You need to install the printer driver so your Windows software applications can take full advantage of the printer’s capabilities. EPSON Status Monitor 3 is not automatically installed when you install the printer driver.
LQ-780/LQ-780N User’s Guide See “Changing the printer driver settings” on page 51 to check and change printer driver settings. Note: While many Windows applications override the settings made with the printer driver, some do not, so you must verify that the printer driver settings match your requirements.
LQ-780/LQ-780N User’s Guide 2. Click Preferences. The Printing Preferences window appears, and you see the Paper/Quality, Layout, User Defined Paper, and Extension Settings menus. These menus contain the printer driver settings. 3. To view a menu, click the corresponding tab at the top of the window. See “Changing the printer driver settings” on page 51 to change the settings.
LQ-780/LQ-780N User’s Guide Accessing the printer driver from the Start menu Follow these steps to access the printer driver from the Start menu: Note: The screen shots used in this procedure are from the Windows 10 operating system. The content on the screen and the following steps may vary depending on your computer’s environment. 1. Click on the Start button, and then select Windows System > Control Panel > View devices and printers in Hardware and Sound. 2.
LQ-780/LQ-780N User’s Guide When you click Printer properties in the menu displayed by right-clicking the printer icon, the Properties window appears, which includes menus used to make the printer driver settings. 3. To view a menu, click the corresponding tab at the top of the window. See “Printer Driver Settings Overview” on page 52 for more information.
LQ-780/LQ-780N User’s Guide Click the Help button on the Printer Driver screen. When you finish making your printer driver settings, click OK to apply the settings, or click Cancel to cancel your changes. Once you have checked your printer driver settings and changed them if necessary, you are ready to print. Printer Driver Settings Overview The following tables show the Windows printer driver settings. Note that not every setting is available in all versions of Windows.
LQ-780/LQ-780N User’s Guide Settings Explanations Draw Borders* Select to print a border around the pages. Paper Source Select the paper source you want to use. User Defined Paper If your paper is not included in the Paper Size drop-down list, you can add the size to the list. For more details, see Help for the printer driver. Offset This setting allows you to offset the image on the page. That is, you can adjust the position of the printed image.
LQ-780/LQ-780N User’s Guide Settings Explanations Printer Font Setting Select a character table group to use. You can select one of three character table groups, Standard, Expanded, and None (Bit Image printing). When Standard or Expanded is selected, the printer uses the device fonts. Expanded includes more fonts than Standard. When None is selected, the printer uses bit map images instead of the device fonts. For details on the fonts which are included in each table, see “Electronic” on page 109.
LQ-780/LQ-780N User’s Guide Monitoring settings Settings Explanations EPSON Status Monitor 3 You can access EPSON Status Monitor 3 when you click this button. To monitor the printer, make sure the Monitor the printing status check box is selected. Monitoring Preferences Click this button to open the Monitoring Preferences dialog box where you can make settings for EPSON Status Monitor 3. See “Setting up EPSON Status Monitor 3” on page 56 for more information.
LQ-780/LQ-780N User’s Guide Note: ❏ If you are using a computer running with different OS by multiple users are logged on, a communication error message may be displayed when monitoring printers at the same time. ❏ Although you can print to the printer directly connected to the computer in a remote location by using Remote Desktop function, communication error may occur.
LQ-780/LQ-780N User’s Guide 3. Click the Monitoring Preferences button. The Monitoring Preferences dialog box appears. 4. The following settings are available: Select Notification Displays the error item check box On/Off status. Turn on this check box to display the selected error notification. Select Shortcut Icon The selected icon is displayed on the taskbar. The setting’s example is shown on the right window.
LQ-780/LQ-780N User’s Guide Accessing EPSON Status Monitor 3 Do one of the following to access EPSON Status Monitor 3; ❏ Double-click the printer-shaped shortcut icon on the taskbar. To add a shortcut icon to the taskbar, go to the Utility menu and follow the instructions. ❏ Open the Utility menu, then click the EPSON Status Monitor 3 icon. To find out how to open the Utility menu, See “Using the Printer Driver” on page 47.
LQ-780/LQ-780N User’s Guide When you access EPSON Status Monitor 3 as described above, the following printer status window appears. You can view printer status information in this window. Note: It might not be possible to retrieve the printer status during printing. In this situation, click the EPSON Status Monitor 3 button in the Utility tab, and use the printer with the status window left open.
LQ-780/LQ-780N User’s Guide 1. Open the Utility menu, then click the Bi-D Adjustment icon. To find out how to open the Utility menu, see “Using the Printer Driver” on page 47. The Bi-D Adjustment window appears. 2. Click Next. 3. Click Print. The printer prints three sets of adjustment pattern. To see the adjustment pattern, you need four sheets of A3 size single sheet paper or 12 inch (recommended) continuous paper.
LQ-780/LQ-780N User’s Guide Using Printer Setting This utility tool allows you to display current settings stored in the printer, change settings of the printer, and read settings stored in the file or save settings to the file. You can also change some of the printer’s default settings stored in the printer from this utility. For details on the setting items, see “Changing default settings” on page 25.
LQ-780/LQ-780N User’s Guide 1. Open the Utility menu, then click the Printer Setting icon. To find out how to open the Utility menu, see “Using the Printer Driver” on page 47. The Printer Setting windows appears. 2. Change the necessary printer settings. For details on how to use this tool, refer to the printer driver Help. Note: To display additional printer default settings, select Setting from the menu at the top of the Printer Setting window, and then select Show Expansion Setting....
LQ-780/LQ-780N User’s Guide Setting Up Your Printer on a Network Sharing the printer This section describes how to share the printer on a standard Windows network. The computers on a network can share a printer that is directly connected to one of them. The computer that is directly connected to the printer is the printer server, and the other computers are the clients which need permission to share the printer with the printer server. The clients share the printer via the printer server.
LQ-780/LQ-780N User’s Guide In either case, follow the on-screen instructions. Select Share this printer, then type the name in the Share name box and click OK. Note: Do not use spaces or hyphens for the share name, or an error may occur. You need to set the client computers so that they can use the printer on a network. See the following pages for details: ❏ See “Setting for the clients” on page 65.
LQ-780/LQ-780N User’s Guide 2. Click Turn Windows Firewall on or off in the window on the left. Make sure that Block all incoming connections, including those in the list of allowed apps is not selected, and then click OK. 3. Click Allow an app or feature through Windows Firewall in the window on the left. 4. Select File and Printer Sharing, and then click OK. Setting for the clients This section describes how to install the printer driver by accessing the shared printer on a network.
LQ-780/LQ-780N User’s Guide 2. Right-click the icon for the printer you wish to change the settings for, and then click Printer properties.
LQ-780/LQ-780N User’s Guide 3. Click the Ports tab and then click Add Port. 4. When the Printer Ports window appears, select Local Port, and then click New Port.
LQ-780/LQ-780N User’s Guide 5. Enter the following information for the port name and then click OK. \\Name of computer connected to the target printer\name of shared printer 6. After returning to the Printer Ports window, click Cancel. 7. Check that the name you entered for the port has been added and selected, and then click Close.
LQ-780/LQ-780N User’s Guide 2. Insert the CD-ROM, then the Install Navi dialog box appears. Cancel the dialog box by clicking Cancel, then type the appropriate drive and folder names in which the printer driver for clients is located, then click OK. 3. Select the name of the printer, then click OK. Then follow the on-screen instructions. Note: ❏ If you also want to install EPSON Status Monitor 3, see “Installing EPSON Status Monitor 3” on page 56 for instructions.
LQ-780/LQ-780N User’s Guide 2. When cancelling all printing documents, select Cancel All Documents on the Printer menu. When cancelling a specified document, select a document you want to cancel and select Cancel on the Document menu. The printing job is canceled. Uninstalling the Printer Software When you wish to reinstall or upgrade the printer driver, uninstall the printer driver that has been installed already.
LQ-780/LQ-780N User’s Guide 3. Open Control Panel: Click on the Start button, and then select Windows System > Control Panel. 4. Open Uninstall a program (or Add or Remove Programs): Select Uninstall a program in Programs. 5. Select the software you want to uninstall. 6. Uninstall the software: Click Uninstall/Change or Uninstall. Note: If the User Account Control window is displayed, click Continue. 7. Click the Printer Model tab, select the icon of the printer you want to uninstall, then click OK.
LQ-780/LQ-780N User’s Guide 8. Follow the on-screen instructions.
LQ-780/LQ-780N User’s Guide Chapter 4 Troubleshooting Checking the Printer Status Using the Error Indicators You can identify many common printer problems using the lights on the control panel. If your printer stops working and one or more control panel lights are on or flashing or the printer beeps, use the following table to diagnose and fix the problem. If you cannot fix your problem using this table, see “Problems and Solutions” on page 74.
LQ-780/LQ-780N Panel light state Beep pattern User’s Guide Problem Solution Paper Out Pause ----- Single sheet paper is not fully ejected. Press the Load/Eject button to eject the sheet. ----- Continuous paper is not fed to the standby position. Tear off the printed page at the perforation; then press the Load/ Eject button. The printer feeds the paper to the standby position. ----- Paper is jammed in the printer. To clear the paper jam, see “Clearing a Paper Jam” on page 82.
LQ-780/LQ-780N User’s Guide You can also use the self test to determine whether the printer or the computer is causing the problem. See “Printing a Self Test” on page 90 for instructions on printing a self test. To pinpoint communication problems, experienced users may want to use the printer’s hex dump mode, described in “Printing Hex Dump” on page 91. To clear a paper jam, see “Clearing a Paper Jam” on page 82. Power supply problems The lights on the control panel do not go on.
LQ-780/LQ-780N User’s Guide The printer is not connected directly to your computer. When you use a printer changer, printer buffer, or a extension cable, the printer does not print correctly due to the combination of these devices. Make sure that the printer works correctly when it is connected to your computer without these devices. The printer driver is not installed correctly. Check that the printer driver is installed properly. If necessary, reinstall the printer driver.
LQ-780/LQ-780N The paper is stuck together with static electricity. User’s Guide Fan the paper well before you use it. The printout is pale. Cause What to do The ribbon is worn out. Replace the ribbon cartridge as described in “Replacing the Ribbon Cartridge” on page 99. The printout is faint. Cause What to do The ribbon is worn out. Replace the ribbon cartridge as described in “Replacing the Ribbon Cartridge” on page 99. Part of the printout is missing, or dots are missing in random positions.
LQ-780/LQ-780N User’s Guide Two line feed commands are being sent at the end of each line of text, because the printer’s auto line feed setting is on. Turn off the auto line feed setting in the printer’s Default Setting mode. See “Changing default settings” on page 25. The line space setting in your application software is incorrect. Adjust the line space setting in your application software. The printer prints strange symbols, incorrect fonts, or other inappropriate characters.
LQ-780/LQ-780N User’s Guide The printer’s page length setting for the rear tractor does not match the size of the continuous paper you are using. Change page length settings for the rear tractor in the using the printer’s Default Setting mode. See “Changing default settings” on page 25 for more information. The top margin or top-of-form position setting is incorrect. Check and adjust the margin or top-of-form position settings in your application software.
LQ-780/LQ-780N User’s Guide The paper source is set to tractor feeding. Set the paper release lever to the single-sheet position. The paper is not loaded properly. See “Loading Single Sheets” on page 37 for instructions on loading single sheet paper. Paper is creased, old, too thin, or too thick. See “Paper” on page 113 for information on paper specifications and use new, clean sheets of paper. Paper does not eject completely. Cause What to do The paper may be too long.
LQ-780/LQ-780N User’s Guide Cause What to do Your paper may be too long or too short. Make sure the page length of your paper is within the specified range. See “Paper” on page 113 for information on the continuous paper specification. You may be trying to feed too much paper backward. If you are using normal continuous paper, tear off the last printed page and press the Load/Eject button to feed the paper backward.
LQ-780/LQ-780N User’s Guide Clearing a Paper Jam For jammed continuous paper Note: If continuous paper is jammed, pull out the paper from the push tractor side (rear). If you pull out the paper from the sheet guide side (front), some paper may remain inside the printer. 1. Turn off the printer. 2. Tear off the fresh supply and the printed pages at the perforation nearest the printer. 3. Open the sprocket cover to release the paper.
LQ-780/LQ-780N User’s Guide 4. Open the printer cover. 5. Pull the paper bail forward. Secure it in place by fitting it into the slot on the both sides. 6. Remove the ribbon cartridge. For details, see “Replacing the ribbon cartridge” on page 99.
LQ-780/LQ-780N User’s Guide 7. Pull up the jammed paper from rear tractor. 8. Install the ribbon cartridge. For details, see “Replacing the ribbon cartridge” on page 99. 9. Lift the paper bail up to remove it from the slot on the both sides, and then return it to its original position. 10. Close the printer cover.
LQ-780/LQ-780N User’s Guide For jammed single sheet paper Note: If cut sheet paper is jammed, pull out the paper from the sheet guide side (front). If you pull out the paper from the push tractor side (rear), some paper may remain inside the printer. 1. Turn off the printer. 2. Set the paper release lever to the tractor feeding position. 3. Open the printer cover. 4. Pull the paper bail forward.
LQ-780/LQ-780N User’s Guide Secure it in place by fitting it into the slot on the both sides. 5. Remove the ribbon cartridge. For details, see “Replacing the ribbon cartridge” on page 99. 6. Pull up the jammed paper from front side. 7. Install the ribbon cartridge. For details, see “Replacing the ribbon cartridge” on page 99.
LQ-780/LQ-780N User’s Guide 8. Lift the paper bail up to remove it from the slot on the both sides, and then return it to its original position. 9. Close the printer cover. For jammed paper remains inside the printer If paper remains inside the printer even after performing the steps for "For jammed continuous paper" or "For jammed single sheet paper", remove it using the following procedure. 1. Turn off the printer and open the printer cover. 2.
LQ-780/LQ-780N User’s Guide 6. Return the paper bail to its original position, close the printer cover, and then turn on the power. 7. Press the u button to eject the remaining pieces of paper. 8. Turn off the printer, open the printer cover, and remove any remaining pieces of paper. 9. Return the paper release lever to the appropriate position. 10. Close the printer cover.
LQ-780/LQ-780N User’s Guide 3. As described in the instructions, compare the alignment patterns and select the pattern with the best alignment. Then select the pattern with the best alignment for each of the remaining sets of alignment patterns. 4. After you select the best pattern in the final set of alignment patterns and save your selection by pressing the Tear Off button, turn off the printer and exit the bidirectional adjustment mode.
LQ-780/LQ-780N User’s Guide Printing a Self Test Running the printer’s self test helps you determine whether the printer or the computer is causing the problem: ❏ If the self test results are satisfactory, the printer is working properly and the problem is probably caused by your printer driver settings, application settings, computer, or interface cable. (Be sure to use a shielded interface cable.) ❏ If the self test does not print properly, there is a problem with the printer.
LQ-780/LQ-780N Note: To temporarily stop the self test, press the again. button. To resume the test, press the User’s Guide button button to stop printing. If paper remains in the printer, press 4. To end the self test, press the the u button to eject the printed page. Then turn off the printer. ! Caution: Do not turn off the printer while it is printing the self test. Always press the button to stop printing and the u button to eject the printed page before you turn off the printer.
LQ-780/LQ-780N User’s Guide By comparing the characters printed in the right column with the printout of the hexadecimal codes, you can check the codes being received by the printer. If characters are printable, they appear in the right column as ASCII characters. Nonprintable codes, such as control codes, are represented by dots. 4. To exit the hex dump mode, press the printer.
LQ-780/LQ-780N User’s Guide Chapter 5 Where To Get Help Technical Support Web Site If you need further help, visit the Epson support website shown below. Select your country or region and go to the support section of your local Epson website. The latest drivers, FAQs, manuals, or other downloadables are also available from the site. https://support.epson.net/ https://www.epson.
LQ-780/LQ-780N User’s Guide ❏ Your computer operating system name and version ❏ Names and versions of the software applications you normally use with your product Note: Depending on the product, the dial list data for fax and/or network settings may be stored in the product’s memory. Due to breakdown or repair of a product, data and/or settings may be lost. Epson shall not be responsible for the loss of any data, for backing up or recovering data and/or settings even during a warranty period.
LQ-780/LQ-780N User’s Guide Epson Service Center 65 Truong Dinh Street, District 1, Hochiminh City, Vietnam. Phone(Ho Chi Minh City): 84-8-3823-9239, 84-8-3825-6234 29 Tue Tinh, Quan Hai Ba Trung, Hanoi City, Vietnam Phone(Hanoi City): 84-4-3978-4785, 84-4-3978-4775 Help for Users in Indonesia Contacts for information, support, and services are: World Wide Web http://www.epson.co.
LQ-780/LQ-780N NORTH SUMATERA ESC MEDAN DI YOGYAKARTA EAST JAWA Jl. Bambu 2 Komplek Graha Niaga Nomor A-4, Medan - North Sumatera (+6222) 4207033 ESC YOGYAKARTA YAP Square, Block A No. 6 Jl. C Simanjutak Yogyakarta - DIY (+62274) 581065 ygy-admin@epson-indonesia.co .id ESC SURABAYA Hitech Mall Lt. 2 Block A No. 24 Jl. Kusuma Bangsa No. 116 - 118 Surabaya - JATIM (+6231) 5355035 Jl. Cendrawasih NO. 3A, kunjung mae, mariso, MAKASSAR - SULSEL 90125 (+62411) 8911071 Komp.
LQ-780/LQ-780N EAST JAVA NORTH SULAWESI ESC JEMBER ESC MANADO User’s Guide JL. Panglima Besar Sudirman Ruko no.1D Jember-Jawa Timur (Depan Balai Penelitian & Pengolahan Kakao) (+62331) 488373 / 486468 Tekno Megamall Lt LG 11 TK 21, Kawasan Megamas Boulevard, Jl Piere Tendean, Manado - SULUT 95111 (+62431) 8890996 jmr-admin@epson-indonesia.co .id MND-ADMIN@EPSON-INDONES IA.CO.ID For other cities not listed here, call the Hot Line: 08071137766.
LQ-780/LQ-780N User’s Guide Help for Users in the Philippines To obtain technical support as well as other after sales services, users are welcome to contact the Epson Philippines Corporation at the telephone, fax numbers and e-mail address below: World Wide Web http://www.epson.com.ph Information on product specifications, drivers for download, Frequently Asked Questions (FAQ), and E-mail Enquiries are available.
LQ-780/LQ-780N User’s Guide Chapter 6 Options and Consumables Replacing the Ribbon Cartridge Genuine Epson ribbon cartridge When printing becomes faint, you need to replace the ribbon cartridge. Genuine Epson ribbon cartridges are designed and manufactured to work properly with your Epson printer. They ensure proper operation and long life of the print head and other printer parts. Other products not manufactured by Epson may cause damage to your printer, which is not covered by Epson’s warranties.
LQ-780/LQ-780N User’s Guide The print head automatically moves to the ribbon cartridge replacement position. ! Caution: If you open the printer cover while the power is on, the buzzer sounds, so wait until the print head moves and comes to a stop. 2. Make sure that the print head is near the center, and then turn off the printer. ! Warning: If you have just used the printer, the print head may be hot; let it cool for a few minutes before replacing the ribbon cartridge.
LQ-780/LQ-780N User’s Guide 4. Grasp the ribbon guide and pull it until it is out of the print head. 5. Hold the tabs at both sides of the ribbon cartridge and pull it out of the printer. 6. Remove the new ribbon cartridge from its package. 7. Hold the ribbon cartridge and insert it into the printer as shown below; then press both sides of the cartridge firmly to fit the plastic hooks into the printer slots.
LQ-780/LQ-780N User’s Guide 8. Attach the ribbon guide to the print head by sliding it in while inserting the guide pins until it clicks into place. Note: Be sure that the ribbon is not twisted when you slide the ribbon guide into the print head. 9. Turn the ribbon-tightening knob to remove any slack in the ribbon so that the ribbon moves freely.
LQ-780/LQ-780N User’s Guide 10. Lift the paper bail up to remove it from the slot on the both sides, and then return it to its original position. 11. Close the printer cover. Roll Paper Holder The optional roll paper holder (C811141) allows you to use 8.5-inch roll paper like that used with telex machines. This provides an inexpensive alternative to using continuous paper for applications requiring variable paper lengths. Before you install and use the roll paper holder, you need to assemble it.
LQ-780/LQ-780N User’s Guide 1. Fit the arc bearings into the stand as shown. 2. Place the base plate on the stand and fasten the two together with the plastic spacing clips. Make sure you orient the stand and base plate as shown below. 3. Hook the tension lever onto both ends of the stand as shown below. While pulling up on the tension lever, fit the wire ends of the tension lever into the holes in the stand. The roll paper holder is assembled.
LQ-780/LQ-780N User’s Guide 2. Slide the edge guide all the way to the left, and facing the back of the printer, slide both sprocket units all the way to the right. 3. Position the roll paper holder beneath the printer as shown below. Fit the two holes in the roll paper holder base under the two positioning pegs on the bottom of the printer. Gently lower the printer so the positioning pegs slide into the holes.
LQ-780/LQ-780N User’s Guide 3. Cut the leading edge of the roll paper straight across. 4. Insert the roll paper holder shaft into the center of the paper roll as shown. 5. Set the shaft and paper roll onto the roll paper holder. Load the roll so that paper feeds from the top of the roll and the edge of the roll paper passes the tension lever. 6. Turn on the printer and make sure that the single-sheet feeding is selected as described in “Selecting a Paper Source” on page 29. 7.
LQ-780/LQ-780N User’s Guide Removing roll paper Roll paper cannot be fed backward. To remove a roll paper, cut the roll paper behind where it feeds into the printer; then press the Load/Eject button to eject the remaining paper.
LQ-780/LQ-780N User’s Guide Chapter 7 Product Information Printer Specifications Mechanical Printing method: 24-pin impact dot matrix Printing speed: High speed draft 487 cps at 10 cpi Draft 366 cps at 10 cpi Letter quality 121 cps at 10 cpi Printing direction: Bidirectional logic seeking for text and graphics printing. Unidirec‐ tional text or graphics printing can be selected using software com‐ mands.
LQ-780/LQ-780N Dimensions and weight: Ribbon: Acoustic noise: User’s Guide Height 211 mm (8.3 inches) Width 480 mm (18.9 inches) Depth 301.3 mm (11.9 inches) Weight approx. 6.72 kg (14.81 lb) Black ribbon cartridge S015656 (For users in America) C13S015657 (For worldwide users) C13S015658 (For users in Asia) Ribbon life (at 10 cpi in the letter quality mode with 48 dots/character) black ribbon approx. 10 million characters Approx.
LQ-780/LQ-780N Fonts: User’s Guide Bitmap fonts: Epson High Speed Draft 10 cpi Epson Draft 10, 12, 15 cpi Epson Roman 10, 12, 15 cpi, proportional Epson Sans Serif 10, 12, 15 cpi, proportional Epson Courier 10, 12, 15 cpi Epson Prestige 10, 12 cpi Epson Script 10 cpi Epson OCR-B 10 cpi Epson Orator 10 cpi Epson Orator-S 10 cpi Epson Script C proportional Scalable fonts: Epson Roman 10.5 pt., 8 pt. - 32 pt. (every 2 pt.) Epson Sans Serif 10.5 pt., 8 pt. - 32 pt. (every 2 pt.) Epson Roman T 10.5 pt., 8 pt.
LQ-780/LQ-780N Character tables: User’s Guide Standard model: Italic table, PC 437 (US, Standard Europe), PC 850 (Multilingual), PC 860 (Portuguese), PC 861 (Icelandic), PC 865 (Nordic), PC 863 (Canadian-French), BRASCII, Abicomp, ISO Latin 1, Roman 8, PC 858, ISO 8859-15 Expanded model: Italic table, PC 437 (US, Standard Europe), PC 850 (Multilingual), PC 860 (Portuguese), PC 861 (Icelandic), PC 865 (Nordic), PC 863 (Canadian-French), BRASCII, Abicomp, ISO Latin 1, Roman 8, PC 858, ISO 8859-15, PC 437 G
LQ-780/LQ-780N Power consumption (with USB connection) AC 100 - 120 V: Approx. 49 W (ISO/IEC 10561 letter pattern) LQ-780: Approx. 0.7 W in sleep mode * 0.1 W in power-off LQ-780N: Approx. 0.8 W in sleep mode * 0.1 W in power-off User’s Guide Approx. 46 W (ISO/IEC 10561 letter pattern) LQ-780: Approx. 0.8 W in sleep mode * 0.1 W in power-off LQ-780N: Approx. 0.8 W in sleep mode * 0.1 W in power-off AC 220 - 240 V: Approx. 47 W (ISO/IEC 10561 letter pattern) LQ-780: Approx. 0.8 W in sleep mode * 0.
LQ-780/LQ-780N User’s Guide Paper Note: ❏ Use recycled paper, multipart paper, labels, envelopes, and postcards only under normal temperature and humidity conditions described below. Temperature: 15 to 25 ˚C (59 to 77 ˚F) Humidity: 30 to 60 % RH ❏ Do not load paper that is curled, folded, or crumpled. Single sheets See also “Multipart forms” on page 116 for detailed information on the specification for single sheet multipart forms. Width 90 to 304.8 mm (3.5 to 12.0 inches) Length 70 to 420 mm (2.
LQ-780/LQ-780N User’s Guide ❏ The sprocket hole must be a circle or notched circle. ❏ The holes must be cleanly cut. ❏ If the horizontal and vertical perforations are crossed, the shaded area below should not be printed on. Uncrossed perforations do not have this restricted area. A: B: 28 mm (1.1 inches) 3 mm (0.12 inch) 1. 2. vertical perforation horizontal perforation 1. 2.
LQ-780/LQ-780N User’s Guide ❏ If you use continuous paper whose page length (A in the next illustration) is under 101.6 mm (4.0 inches), make sure that the length between folds (B) is over 101.6 mm (4.0 inches.) Width 101.6 to 304.8 mm (4.0 to 12.0 inches) Length/page 76.2 to 558.8 mm (3.0 to 22.0 inches) Copies 1 original + 6 copies Total thickness single sheets 0.065 to 0.15 mm (0.0025 to 0.0059 inch) multipart forms 0.12 to 0.49 mm (0.0047 to 0.0192 inch) Weight single sheets 52.
LQ-780/LQ-780N User’s Guide Multipart forms The specifications for the dimensions of multipart forms are the same as those for single sheets and continuous paper. See “Single sheets” on page 113 and “Continuous paper” on page 113 for detailed information. ❏ The form sheets of continuous multipart forms should be securely joined together along the left and right edges by crimping or, spot-gluing. For the best printing quality, use multipart forms joined with spot-gluing.
LQ-780/LQ-780N User’s Guide ❏ The binding area should be flat and have no creases. ❏ The sprocket holes should be a circle or a notched circle. ❏ The sprocket holes of all sheets in the form should be aligned properly. ❏ The binding position should be outside the printable area. See “Printable area” on page 119 for more information. Labels ❏ Labels should be securely attached to the backing sheet and the label surface must be flat.
LQ-780/LQ-780N User’s Guide Backing sheet width single sheets 100 to 210 mm (3.9 to 8.3 inches) multipart forms 101.6 to 304.8 mm (4.0 to 12.0 inches) Labels Width 63.5 mm (2.5 inches), minimum Height 23.8 mm (0.94 inch), minimum Corner radius 2.5 mm (0.1 inch), minimum Weight 64 g/m² (17 lb) Thickness Backing sheet 0.07 to 0.09 mm (0.0027 to 0.0035 inch) Total 0.16 to 0.19 mm (0.0063 to 0.
LQ-780/LQ-780N User’s Guide Postcards Width 90 to 200 mm (3.5 to 7.8 inches) Length 60 to 200 mm (2.3 to 7.8 inches) Thickness 0.22 mm (0.0087 inch) Weight 192 g/m² (51 lb) Quality Plain paper Roll paper Width 213 to 219 mm (8.38 to 8.62 inches) Thickness 0.07 to 0.09 mm (0.0028 to 0.0035 inch) Weight 52 to 82 g/m² (14 to 22 lb) Quality Plain paper Printable area Single sheets (including single sheet multipart forms) A: 4.2 mm (0.
LQ-780/LQ-780N User’s Guide Continuous paper (including continuous multipart forms) A: The minimum top and bottom margins (above and below the perforation) are 4.2 mm (0.17 inch). B: The minimum left or right margin is 13 mm (0.51 inch). 18 mm for the paper whose page width is 304.8 mm (12.0 inches). * printable area Labels A: 13 mm (0.51 inch) or more B: 1.2 mm (0.0472 inch) or more C: 3 mm (0.118 inch) or more A: The minimum top margin is 4.2 mm (0.17 inch). B: 3 mm (0.
LQ-780/LQ-780N User’s Guide Roll paper A: The minimum top margin is 4.2 mm (0.17 inch). B: The minimum left margin is 3.0 mm (0.12 inch). The minimum right margin is 3.0 mm (0.12 inch). The maximum printable width is 269.24 mm (10.6 inches). System Requirements Windows 11/Windows 10 (32-bit, 64-bit)/Windows 8.
LQ-780/LQ-780N EMC User’s Guide CISPR32 Class A, CISPR 24 EN55032 Class A, EN55035 EN61000-3-2, EN610003-3 For users in U.S. and Canada Safety UL62368-1 CAN/CSA-C22.2 No.62368-1 EMC FCC Part 15 Subpart B Class A ICES-003 Class A Note: ❏ This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
LQ-780/LQ-780N User’s Guide Follow these steps to clean your printer: 1. Remove any paper loaded in the printer, and turn off the printer. 2. Use a soft brush to carefully brush away all dust and dirt from the outer case and sheet guide. 3. If the outer case and the sheet guide are still dirty or dusty, clean them with a soft, clean cloth dampened with mild detergent dissolved in water. Keep the printer cover and front cover closed to prevent water from getting inside the printer.
LQ-780/LQ-780N User’s Guide 5. Remove the sheet guide. If any options are installed, remove them and pack them in their original boxes.
LQ-780/LQ-780N User’s Guide 6. Pull the paper bail forward. Secure it in place by moving it forward until the front edge lowers and comes to a stop, and then attach the plastic packing material to prevent the head from moving.
LQ-780/LQ-780N User’s Guide 7. Lift up the front of the paper bail and let it move backwards to return it to its original position. 8. Make sure that the printer cover is closed. 9. Repack the printer, sheet guide, ribbon cartridge, and power cord (if necessary) in their original packing materials and place them in the printer’s original box.
