Manuel d'utilisation / d'entretien du produit L7400 du fabricant HP (Hewlett-Packard)
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P odręcznik użytk o w nik a HP Off ice jet Pr o L7 4 00 A ll-in - One se r ie s User G uid e.
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HP Officejet Pro L7400 All-in- One series User Guide.
Copyright information © 2007 Copyright Hewlett-Packard Development Company, L.P. Hewlett-Packard Company notices The information contained in this document is subject to change without notice.
Contents 1 Get started Find other resources for the product ............................ .................................. ...........................6 Understand the device parts ....................... ...... .................................. ....
Print on both sides (duplexing) .. ........... .............. .......... ....... ................. ............ ................ ...... 31 Guidelines for printing on both sides of a page ........................................ .......................
Configure the device (Windows) ... ........................ ......................... .................. ....................... 50 Direct connection ............ ......................... ......... ........................ ........................ ..
Solve paper-feed problems ...... ............................................. ...................... ............................ 73 Optional Tray 2 cannot be inserted .......................... .......................... ............................
Prepare the device for shipment .......................... ........................ ...................... .....................95 Remove the ink cartridges and printheads before shipment .... ............. ......... ............. ......95 Remove the control-panel faceplate .
1 Get started This guide provides details about how to use the device and to resolve problems. • Find other resources for the product • Understand the device parts Find other resources for the pro.
Resource Description Location • Serial number • Firmware version number • Number of pages printed from the trays and accessories • Ink levels • Printhead health status Print quality diagnost.
Front view 1 Scanner lid 2 Scanner glass 3 Control panel 4 Display 5 Length/width guides 6 Input tray 7 Output tray extension 8 Output tray Printing supplies area 1 Ink cartridge door 2 Ink cartridges.
4 Printheads 5 Printhead latch Back view 1 Power input 2 Rear universal serial bus (USB) port 3 Rear access panel Control panel buttons and lights The following diagram and related table provide a quick reference to the control panel features. Label Name and Description 1 Keypad : Enters values.
Label Name and Description 7 Scan To : Presents the Scan To menu for selecting a scan destination. 8 Power : Turns the device on or off. The Power button is lit when the device is on. The light blinks while performing a job. When the device is turned off, a minimal amount of power is still supplied.
2 Install the accessories This section contains the following topics: • Install the duplexer • Install Tray 2 • Turn on accessories in the print driver Install the duplexer NOTE: This feature is available with some models of the device.
Tray 2 can hold up to 350 sheets of plain paper. For ordering information, see HP supplies and accessories . To install Tray 2 1. Unpack the tray, remove the packing tapes and materials, and move the tray to the prepared location. The surface must be sturdy and level.
To turn on accessories on Wind ow s computers After you install the device software on Windows computers, Tray 2 must be turned on in the print driver in order for it to work with the device. (The duplexer does not need to be turned on.) 1. Click Start , point to Settings , and then click Printers or Printers and Faxes .
3 Use the device This section contains the following topics: • Use control panel menus • Control-panel message types • Change device settings • Use the HP Solution Center (Windows) • Use the.
Warning messages Warning messages inform you of events that require your attention, but they do not prevent the device from operating. An example of a warning message is CYAN INK LOW .
To change settings from the HP photo and imaging software (Mac OS) 1. Click the HP Device Manager icon in the Dock. 2. Select the device in the Devices drop-down menu.
Regardless, the entry point serves as the launching pad for the HP photo and imaging software and services. To open the HP Photosmart Software on a Windows computer 1. Do one of the following: • On the Windows desktop, double-click the HP Photosmart Software icon.
NOTE: Many of the special features will not work correctly if the glass and lid backing are not clean. For more information, see Clean the device . To load an original on the scanner glass 1. Lift the scanner lid. 2. Load your original print side down in the right front corner of the glass.
• Media that is heavily textured, embossed, or does not accept ink well • Media that is too lightweight or stretches easily Cards and envelopes • Avoid envelopes that have a very slick finish, self-stick adhesives, clasps, or windows.
Media size Tray 1 Tray 2 Duplexer Standard media sizes U.S. Letter (216 x 279 mm; 8.5 x 11 inches) 8.5 x 13 inches (216 x 330 mm) U.S. Legal (216 x 356 mm; 8.5 x 14 inches) A4 (210 x 297 mm; 8.3 x 11.7 inches) U.S. Executive (184 x 267 mm; 7.25 x 10.5 inches) U.
Media size Tray 1 Tray 2 Duplexer Cards Index card (76.2 x 127 mm; 3 x 5 inches) Index card (102 x 152 mm; 4 x 6 inches) Index card (127 x 203 mm; 5 x 8 inches) A6 card (105 x 148.5 mm; 4.13 x 5.83 inches) Borderless A6 card (105 x 148.5 mm; 4.13 x 5.
Media size Tray 1 Tray 2 Duplexer Borderless panorama (4 x 10 inches, 4 x 11 inches, and 4 x 12 inches) ** The device is compatible with plain and inkjet hagaki from Japan Post only. It is not compatible with photo hagaki from Japan Post. Understand supported media types and weights NOTE: Tray 2 and the duplexer are available with some models.
Set minimum margins The document margins must match (or exceed) these margin settings in portrait orientation. Media (1) Left margin (2) Right margin (3) Top margin (4) Bottom margin* U.S. Letter U.S. Legal A4 U.S. Executive U.S. Statement 8.5 x 13 inch B5 A5 Cards Custom-sized media Photo media 3.
To load Tray 1 (main tray) 1. Lift the output tray. 2. Insert the media print-side down along the right of the tray. Make sure the stack of media aligns with the right and back edges of the tray, and does not exceed the line marking in the tray. NOTE: Do not load paper while the device is printing.
4. Pull out the extension on the output tray. To load Tray 2 1. Pull the tray out of the device by grasping under the front of the tray. 2. Insert the paper print-side down along the right of the tray. Make sure the stack of paper aligns with the right and back edges of the tray, and does not exceed the line marking in the tray.
4. Gently reinsert the tray. 5. Pull out the extension on the output tray. Configure trays NOTE: Tray 2 is optional with some models. For ordering information, see Order printing supplies online . By default, the device draws media from Tray 1. If Tray 1 is empty, the device draws media from Tray 2 (if it is installed and loaded with media).
To configure the trays 1. Make sure the device is turned on. 2. Perform one of the following: • Print driver (Windows): Click the Printer services button on either the Features or Color tab, and then select Paper Handling . • Toolbox (Windows): Click the Services tab and click Paper Handling .
c . In the Width and Height boxes, type the dimensions and set the margins, if desired. d . Click Done or OK , and then click Save . 5. On the File menu, click Page Setup , and then select the new custom size. 6. Click OK . 7. On the File menu, click Print .
To print a borderless document (Mac OS) 1. Load the appropriate media. For more information, see Load media . 2. Open the file that you want to print. 3. Click File , and then click Page Setup . 4. Select the borderless media size, and then click OK .
4 Print This section contains the following topics: • Change print settings • Print on both sides (duplexing) • Cancel a print job Change print settings You can change print settings (such as paper size or type) from an application or the printer driver.
3. On the File menu, click Print to open the print driver. 4. Change the settings that you want (such as media type), and then click OK or Print . Print on both sides (duplexing) You can print on both sides of a sheet of media either manually, or automatically using the optional duplexer.
7. Choose a booklet layout from the Booklet Layout drop-down list, if you want. 8. Change any other settings, and then click OK . 9. Print your document. To print manually on both sides of a page (Mac OS) 1. Load the appropriate media. For more information, see Guidelines for printing on both sides of a page and Load media .
Cancel a print job You can cancel a print job using one of the following methods. Control panel: Press ( Cancel button). This clears the job that the device is currently processing. It does not affect jobs waiting to be processed. Windows: Double-click the printer icon that appears in the lower-right corner of the computer screen.
5 Copy You can produce high-quality color and grayscale copies on a variety of paper types and sizes. This section contains the following topics: NOTE: Copying from the HP photo and imaging software is only available on the Mac OS.
When you change copy settings, the changes are for the current copy job only. You must set the changes as defaults for the settings to apply to all future copy jobs. To save the current settings as defaults for future jobs 1. Make any necessary changes to the settings in the Copy Menu .
To set the paper type for copies from the control panel 1. In the Copy area, press Copy Menu repeatedly until Paper Type appears. 2. Press until the appropriate paper type appears. 3. Press START COPY Black or START COPY Color . Refer to the following table to determine which paper type setting to choose based on the paper loaded in the input tray.
NOTE: Copy functions can also be performed using the HP Photosmart Software (Windows) or HP Photosmart Studio Software (Mac OS). See the software's Help for more information.
To copy a legal-size document onto letter paper 1. Make sure you have paper loaded in the input tray. 2. Place your original face down on the scanner glass. 3. In the Copy area, press the Reduce / Enlarge button. 4. Press until Legal > Ltr 72% appears.
To copy a blurred document from the control panel 1. Make sure you have paper loaded in the input tray. 2. Place your original face down on the scanner glass. 3. In the Copy area, press Copy Menu repeatedly until Enhancements appears. 4. Press until the Text setting appears.
6 Scan You can scan originals and send them to a variety of destinations, such as a folder on the network or a program on a computer. You can use the control panel, the HP photo and imaging software, and TWAIN-compliant or WIA-compliant programs on a computer.
To send a scan to a program on a computer from the HP photo and imaging software 1. On the computer, open the HP photo and imaging software. For more information, see Use the HP photo and imaging software . 2. See the onscreen Help for further instructions.
Edit a scanned photo or graphic You can edit a scanned photo or graphic using the HP Photosmart Software. Use this software to adjust the brightness, contrast, color saturation, and more. You can also rotate the image using the HP Photosmart Software.
7 Configure and manage This section is intended for the administrator or individual who is responsible for managing the device. This section contains information about the following topics.
Monitor the device This section provides instructions for monitoring the device. Use this tool... to obtain the following information.... Control panel Obtain information about the status of jobs that are being processed, the operating status of the device, and the status of ink cartridges and printheads.
• HP Instant Support • myPrintMileage Toolbox (Windows) The Toolbox provides maintenance information about the device. NOTE: The Toolbox can be installed from the Starter CD by selecting the full installation option if the computer meets the system requirements.
Tabs Contents Services • Print PQ (print quality) Diagnostic Page: Allows you to diagnose issues affecting the print quality of the device. For more information, see Print the print quality diagnostic page . • Print Self-Test Diagnostic Page: Allows you to print the self-test diagnostic page of the device.
• Device Information: Displays information about the model and serial number. Also allows you to print the self-test diagnostic page of the device. This page contains information about the device and the supplies. For more information, see Understand the self-test diagnostic page .
NOTE: Do not bookmark the Web pages that are used to open HP Instant Support. If you bookmark the site and connect to it by using the bookmark, the pages do not contain the current information. myPrintMileage myPrintMileage is a service that HP provides to help you track and forecast your device usage and plan the purchase of supplies.
If you need to call HP, it is often useful to print the self-test diagnostic page before calling. 1. Printer Information: Shows device information (such as the product name, model number, serial number, and firmware version number), and the number of pages printed from the tray.
To print the Self-Test Diagnostic Page • Control panel: Press Setup , select Print Report , select Self-Test Report , and then press OK . • Toolbox (Windows): Click the Services tab, and then click Print Self-Test Diagnostic Page .
NOTE: You may connect the USB cable at a later time when you need to use the device. You can also share the device with other computers using a simple form of networking known as locally shared networking. For more information, see Share the device on a locally shared network .
To share the device 1. Click Start , point to Settings , and then click Printers or Printers and Faxes . - Or - Click Start , click Control Panel , and then double-click Printers . 2. Right-click the device icon, click Properties , and then click the Sharing tab.
For more information about USB device sharing, see the support information on the Apple Web site ( www. apple.com ) or the Apple Macintosh Help on the computer. To share the device among computers running Mac OS 1. Turn on printer sharing on all Macintosh computers (host and clients) that are connected to the printer.
8. After the software is installed, connect the device to your computer. 9. Press the Power button to turn the device on. After connecting and turning on the device, you might have to wait several minutes for all of the Plug and Play events to complete.
To uninstall from a Macintosh computer 1. Launch HP Device Manager . 2. Click Information and Settings . 3. Select Uninstall HP AiO Software from the pull-down menu. Follow the onscreen instructions. 4. After the software is uninstalled, restart your computer.
8 Maintain and troubleshoot This section contains the following topics: • Supported ink cartridges • Replace the ink cartridges • Maintain the printheads • Store printing supplies • Clean th.
NOTE: The ink levels shown are an estimate only. Actual ink volumes may vary. After removing a cartridge from its package, install it right away. Do not remove a cartridge from the device for long periods of time. To find out which ink cartridges work with your device, see Supplies .
When the quality of printouts deteriorates, complete the relevant steps based on the following sequence: 1. Check the health of the printheads. For more information, see Check printhead health . 2. Print the print quality diagnostic page on a clean sheet of white paper.
1 Printer Information: Shows device information (such as the product model number, serial number, and firmware version number), the number of pages printed from the tray, the ink level information, and the printhead health status. 2 Test Pattern 1: If the lines are not straight and connected, align the printheads.
Calibrate the linefeed • Control panel: Press the Setup button, select Tools , select Calibrate Linefeed , and then press OK . • Toolbox (Windows): Click the Services tab, and then click Calibrate Linefeed and follow the onscreen instructions. • HP Printer Utility (Mac OS): Click Calibrate Linefeed from the Information and Support panel.
4. Lift the handle of the printhead (which corresponds to the control panel message) and use it to pull the printhead out of its slot. 5. Obtain clean, dry, soft and lint-free cleaning material. Suitable materials include paper coffee filters and eyeglass lens cleaning paper.
CAUTION: Touching the nozzles can cause permanent nozzle damage. Also, ink can permanently mark clothing. 7. After cleaning, place the printhead on a sheet of paper or paper towel. Make sure the nozzles are facing up and are not in contact with the paper.
Replace the printheads NOTE: To find out which printheads work with your printer, see Supplies . To replace the printheads 1. Open the top cover. 2. If the carriage does not move to the left automatically, press and hold the OK button for 5 seconds. Wait for the carriage to stop moving.
5. Before installing a printhead, shake the printhead up and down at least six times while the printhead is still in its packaging. 6. Remove the new printhead from its package, and then remove its orange protective caps. CAUTION: Do not shake printheads after the caps are removed.
Store ink cartridges Ink cartridges can be left in the device for extended periods of time. If you remove the ink cartridges, place them in an airtight container, such as a resealable plastic bag. Store printheads Printheads can be left in the device for extended periods of time.
Clean the exterior NOTE: Before cleaning the device, turn off the power and unplug the power cord from the electrical socket. Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off of the case. The exterior of the device does not require cleaning.
• Device takes a long time to print • Blank or partial page printed • Something on the page is missing or incorrect • Placement of the text or graphics is wrong • The device prints half a pa.
Device does not accept printhead Check the printhead latch Make sure the printhead latch is properly closed. Check the printhead • Make sure the printhead is inserted into its correct color-coded slot. For more information, see Replace the printheads .
Check the printhead • Make sure the printhead is inserted into its correct color-coded slot. For more information, see Replace the printheads . • Remove the printhead, and check to make sure the orange protective caps have been removed from the printhead.
Check the media size • Content on a page might be cut off if the document size is larger than the media that you are using. • Make sure the media size selected in the printer driver match the size of media loaded in the tray.
Poor quality printouts Check the printheads and ink cartridges Print the print quality diagnostic page on a clean sheet of white paper. Evaluate any problem areas, and perform the recommended actions. For more information, see Print the print quality diagnostic page .
Ink is smearing Check the print settings • When you print documents that use much ink, allow more time to dry before handling the printouts. This is especially true for transparencies.
Wrong colors are printing Check the print settings Make sure Print in Grayscale is not selected in the printer driver. For information on changing this setting, see Change print settings . Check the printheads Print the print quality diagnostic page on a clean sheet of white paper.
Optional Tray 2 cannot be inserted • Reinsert the tray. Make sure it is aligned with the device opening. • Check for a paper jam. For more information, see Clear a jam in the device . Another paper-feed problem is occurring Media is not supported for the printer or tray Use only media that is supported for the device and the tray being used.
Pages are skewing • Make sure the media loaded in the trays is aligned to the paper guides. If needed, pull out the trays from the device and reload the media properly, making sure that the paper guides are properly aligned. • Make sure the rear access panel or optional duplexer is properly installed.
Copies are blank • Check the media The media might not meet Hewlett-Packard media specifications (for example, the media is too moist or too rough). See Select print media for more information. • Check the settings The contrast setting might be set too light.
Copy defects are apparent • Vertical white or faded stripes The media might not meet Hewlett-Packard media specifications (for example, the media is too moist or too rough). See Select print media for more information. • Too light or dark Try adjusting the contrast and copy-quality settings.
Scanner did nothing • Check the original Make sure that the original is placed on the scanner glass correctly. For more information, see Load an original on the scanner glass . • Check the device The device might be coming out of PowerSave mode after a period of inactivity, which delays processing a short while.
Text cannot be edited • Check the settings • Make sure that the OCR software is set to edit text. • When you scan the original, make sure that you select a document type that creates editable text. If text is classified as a graphic, it is not converted to text.
Text or images on the back of a two-sided original appear in the scan Two-sided originals can "bleed" text or images from the back side to the scan if the originals are printed on media that is too thin or too transparent. The scanned image is skewed (crooked) The original might have been placed incorrectly.
• Black dots or streaks • Ink, glue, correction fluid, or an unwanted substance might be on the scanner glass, the scanner glass might be dirty or scratched, or the lid backing might be dirty. Try cleaning the scanner glass and lid backing. See Clean the device for more information.
Check the computer system • Make sure that your computer is running one of the supported operating systems. • Make sure that the computer meets at least the minimum system requirements. Check the device to ensure the fol low ing • Power light is on and not blinking.
• In the Windows device manager, make sure that the USB drivers have not been disabled. • If you are using a computer running Windows, and the computer cannot detect the device, run the uninstallation utility (utilcccuninstall.bat on the Starter CD) to perform a clean uninstallation of the device driver.
c . If the jam is not there, push the latch on the top of the duplexer and lower its cover. If the jam is inside, carefully remove it. Close the cover. d . Reinsert the rear access panel or the duplexer into the device. 3. If you cannot locate the jam, lift the output tray and check for a jam in Tray 1.
Tips for avoiding jams • Make sure that nothing is blocking the paper path. • Do not overload the trays. For more information, see Understand specifications for supported media . • Load paper properly and when the device is not printing. For more information, see Load media .
A HP supplies and accessories This section provides information on HP supplies and accessories for the device. The information is subject to changes, visit the HP Web site ( www.hpshopping.com ) for the latest updates. You may also make purchases through the Web site.
NOTE: The availability of ink cartridges varies by country/region. If you live in Europe, go to www.hp.co m/eu/ hard-to-fi nd-supplies to locate information on HP ink cartridges. Printheads HP 88 Black and Yellow C9381A HP 88 Magenta and Cyan C9382A HP media To order media such as HP Premium Plus Photo Paper or HP Premium Paper, go to www.
B Support and warranty The information in Maintain and troubleshoot suggests solutions to common problems. If your device is not operating correctly and those suggestions did not solve your problem, try using one of the following support services to obtain assistance.
Hewlett-Packard limited warranty statement Hewlett-Packard limited warranty statement 89.
Obtain electronic support To find support and warranty information, go to the HP Web site at www.hp.com/support . If prompted, choose your country/region, and then click Contact HP for information on calling for technical support.
Support process If you have a problem, follow these steps 1. Check the documentation that came with the device. 2. Visit the HP online support Web site at www.
Appendix B 92 Support and warranty.
Placing a call Call HP support while you are in front of the computer and the HP All-in-One. Be prepared to provide the following information: • Model number (located on the label on the front of th.
HP Quick Exchange Service (Japan) For instructions on how to pack your device for exchange, see Pack the device . Call HP Korea customer support Appendix B 94 Support and warranty.
Prepare the device for shipment If after contacting HP Customer Support or returning to the point of purchase, you are requested to send the device in for service, make sure you remove and keep the fo.
3. Remove the ink cartridges from their slots by grasping each between your thumb and forefinger and pulling it firmly toward you. 4. Place the ink cartridges in an airtight plastic container so they will not dry out, and put them aside. Do not send them with the device unless the HP customer support call agent instructs you to.
3. Remove the control-panel faceplate as follows: a . Lift the scanner lid. b . Use either your finger or insert a thin object in the tab on the upper right corner of the control-panel faceplate to pry the control-panel faceplate off. 4. Retain the control-panel faceplate.
To pack the device 1. If available, pack the device for shipment by using the original packaging materials, or use the packaging materials that came with your replacement device. If you do not have the original packaging materials, please use other adequate packaging materials.
C Device specifications For media and media-handling specifications, see Understand specifications for supported media . Physical specifications Size (width x depth x height) • Device with A4/Letter-size scanner glass: 505 x 402 x 356 mm (19.9 x 15.
Device memory 64 MB built-in RAM, 16 MB built-in MROM + 2 MB built-in Flash ROM System requirements NOTE: For the most current information about supported operating systems and system requirements, visit http://www.
• Quick Time 5.0 or later (Mac OS) • A do be Acrobat Reader 5 or later Print specifications Black print resolution Up to 1200 dpi with pigmented black ink Color print resolution HP enhanced photo .
Electrical specifications Power supply Universal power adapter (external) Power requirements Input voltage: 100 to 240 VAC (± 10%), 50/60 Hz (± 3Hz) Output voltage: 32 Vdc, 2500 mA Power consumption.
D Regulatory information The device meets product requirements from regulatory agencies in your country/region. This section contains the following topics: • FCC statement • Notice to users in Kor.
FCC statement Notice to users in Korea Appendix D 104 Regulatory information.
VCCI (Class B) compliance statement for users in Japan Notice to users in Japan about the power cord RoHS notices (China only) Toxic and hazardous substance table LED indicator statement Regulatory model number For regulatory identification purposes, your product is assigned a Regulatory Model Number.
Declaration of conformity Appendix D 106 Regulatory information.
Environmental product stewardship program Hewlett-Packard is committed to providing quality products in an environmentally sound manner. Design for recycling has been incorporated into this product. The number of materials has been kept to a minimum while ensuring proper functionality and reliability.
Disposal of waste equipment by users in private households in the European Union Energy consumption This product is designed to reduce power consumption and save natural resources without compromising product performance. It has been designed to reduce total energy consumption both during operation and when the device is not active.
Index Symbols/Numerics 10 x 15 cm photo paper copy 35 4 x 6 inch photo paper copy 35 A accessibility 4 accessories installation 11 self-test diagnostic page 49 turn on and off in driver 12 warranty 89.
dots, troubleshoot scan 81 double-sided printing 31 driver accessories settings 12 settings 30 version 90 warranty 89 duplex printing accessory order online 86 duplexer clear jams 83 installation 11 m.
management tools 43 margins setting, specifications 23 media borderless printing 28 clear jams 83 duplexing 31 HP, order 87 load tray 23 load tray 2 25 locking trays 26 print on custom-sized 27 select.
Reduce/Enlarge button 9 reduce/enlarge copies resize to fit letter 37 resize to fit letter or A4 37 regulatory information 103 regulatory model number 105 release notes 6 remove ink cartridges and pri.
tray 1 load media 24 tray 2 installation 11 load media 25 order online 86 troubleshoot installation 74 turn on and off in driver 12 trays capacities 22 clear jams 83 installation tray 2 11 load media .
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P odręcznik użytk o w nik a © 200 7 Hewlett-P ack ard De velopment C ompany , L .P . www .hp.com/support.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté HP (Hewlett-Packard) L7400 c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du HP (Hewlett-Packard) L7400 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation HP (Hewlett-Packard) L7400, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le HP (Hewlett-Packard) L7400 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le HP (Hewlett-Packard) L7400, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du HP (Hewlett-Packard) L7400.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le HP (Hewlett-Packard) L7400. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei HP (Hewlett-Packard) L7400 ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
