Lexmark C782 Troubleshooting Guide

Online customer support

Customer support is available on the Lexmark Web site at www.lexmark.com.
The printer is not plugged into any surge
protectors, uninterrupted power supplies, or extension cords. Other electrical equipment plugged into the outlet is working. The printer is turned on. The printer cable is securely attached to the printer and the host computer, print server, option, or other network device.
The message Error reading USB drive appears when using a USB device
The USB device you are using may not be supported or has an error. Only specific USB flash memory devices are supported. For information regarding tested and approved USB flash memory devices, see the Lexmark Web site at www.lexmark.com.
Solving printing problems
Multilanguage PDFs do not print
1 Open the document you want to print in Adobe

Acrobat.

Jobs do not print
The printer is not ready to receive data
Make sure Ready or Power Saver appears on the display before sending a job to print. Press to return the printer to the Ready state.

Calling for service

When you call for printer service, describe the problem you are experiencing, the message on the display, and the troubleshooting steps you have already taken to find a solution. You need to know your printer model type and serial number. See the label behind the toner waste container door of the printer for this information. The toner waste container door is on the left side of the printer. The serial number is also listed on the menu settings page. For service in the U.S. or Canada, call 1-800Lexmark (1-800-539-6275). For other countries/ regions, visit the Lexmark Web site at www.lexmark.com
2 Click the printer icon. 3 The Print dialog box appears. 4 Check the Print as image box.
Note: For Acrobat 7.x or later, click the
advanced button to display the Print as Image option.
The specified output bin is full
Remove the stack of paper from the output bin, and then press.
The specified tray is empty

Load paper in the tray.

5 Click OK.
The operator panel display is blank or displays only diamonds
Turn the printer off, wait about 10 seconds, and turn the printer back on. Performing Self Test appears on the display. When the test is completed, the Ready message is displayed. If the messages do not appear, turn the printer off and call for service.
You are using the wrong printer driver or are printing to a file
Verify that you selected the printer driver
associated with the Lexmark ABC.
Note: When calling for service, call from
the location of the printer.
If you are using a USB port, make sure you are
running Windows Vista, Windows 2000, Windows XP, or Windows Server 2003 and using a Windows Vista, Windows 2000, Windows XP, or Windows Server 2003 compatible printer driver.
Checking an unresponsive printer
If your printer is not responding, first make sure:
The power cord is plugged into the printer and
a properly grounded electrical outlet.
Your MarkNet N8000 series internal print server is not set up properly or is not connected properly
Verify that you have properly configured the printer for network printing.
The electrical outlet is not turned off by any

switch or breaker.

See the Software and Documentation CD or go to the Lexmark Web site for information.

For more information, see the Menus and Messages Guide.
Note: Setting Collation to Off in the
driver overrides the setting in the Finishing Menu. For more informations, see the Menus and Messages Guide.
You are using the wrong interface cable, or the cable is not securely connected
Make sure you are using a recommended interface cable. Make sure the connection is secure.
Job prints from the wrong tray or on the wrong paper or specialty media
Make sure the Paper Size and Paper Type specified in the printer driver match the paper size and type in the tray and what is set on the printers operator panel.

The job is too complex.

Reduce the complexity of the print job by eliminating the number and size of fonts, the number and complexity of images, and the number of pages in the job.

Held jobs do not print

A formatting error has occurred
Print the job. (Only part of the job may print.) Delete the job. Free up additional printer memory by scrolling
through the list of held jobs and deleting others you have sent to the printer.
Incorrect characters print.
You are using an incompatible parallel cable.
If you are using a parallel interface, make sure you are using an IEEE 1284-compliant parallel cable. We recommend Lexmark part number 1329605 (10 ft) or 1427498 (20 ft) for the standard parallel port.
The printer does not have enough memory
Add printer memory or an optional hard disk.
Unexpected page breaks occur.

The job has timed out

Set Print Timeout to a higher value from the Setup Menu. For more informations, see the Menus and Messages Guide
The printer has insufficient memory
The printer is in Hex Trace mode
If Ready. Hex Trace appears on the display, you must exit Hex Trace mode before you can print your job. Turn the printer off and back on to exit Hex Trace mode.
Tray linking does not work
The printer has received invalid data

Delete the job.

Make sure both the size and type of media are

the same in both trays.

Solving mailbox problems
The mailbox and the printer are misaligned
Realign the mailbox and the printer.
Job takes longer than expected to print.

The job is too complex

Reduce the complexity of your print job by eliminating the number and size of fonts, the number and complexity of images, and the number of pages in the job.
Make sure the paper guides in the trays are set
for the correct size media.
Make sure the menu values for both size and
type are set correctly in the Paper Menu.
For more informations, see the Menus and

Messages Guide.

The mailbox is not connected properly
Check the electrical connection.
Large jobs do not collate.

Collate is not set to On

Set Collation to On in the Finishing Menu or through the printer driver.
Page Protect is set to On
Set Page Protect to Off from Print Recovery.

Solving option problems

If an option does not operate correctly after it is installed or if it quits working:
Turn the printer off, wait for about 10 seconds,
and turn the printer on. If this does not fix the problem, unplug the printer, and check the connection between the option and printer.

Option

Action
Rubber feed rollers do not turn to advance paper.

Check the following:

Print the menu settings page and check to see
if the option is listed in the Installed Options list. If the option is not listed, reinstall it.
Serial/ Make sure the Serial/parallel interface Parallel card is securely connected to the printer interface system board. Make sure you are using the correct cable and that it is securely connected.
The power cord is plugged firmly into the back
of the high capacity feeder.
Make sure the option is selected in the software
application you are using. The following table lists printer options and suggested corrective actions for related problems. If the suggested corrective action does not fix the problem, call your service representative.
Option Drawers Action Make sure the connection between drawers and the printer is secure. Make sure the print media is loaded correctly. Make sure the connection between the duplex unit and the printer is secure. If the duplex unit is listed on the menu settings page, but print media jams when it enters or exits the duplex unit, the printer and duplex unit may not be properly aligned. Make sure flash memory is securely connected to the printer system board. Make sure the hard disk is securely connected to the printer system board. Make sure the internal print server (also called an internal network adapter or INA) is securely connected to the printer system board. Make sure you are using the correct cable, that it is securely connected, and the network software is correctly set up. For more details, see the Software and Documentation CD that shipped with your printer. See Solving high capacity feeder problems. Make sure printer memory is securely connected to the printer system board.

Solving high capacity feeder problems
The paper tray does not raise when the loading door is closed, or the paper tray does not lower when the door is opened and the paper tray button is pushed
The power cord is plugged into an outlet. The outlet has power.
Consistent misfeeds or jams in the feeder

Try the following:

Flex the paper. Turn the print media over.
The printer is properly attached to the high

capacity feeder.

Duplex unit
The printer is powered on. The power cord is plugged firmly into the back
Feeder is properly installed. Paper is loaded correctly. Paper is not damaged. Paper meets specifications. Guides are positioned correctly for the paper size selected.

Service messages

A service message indicates printer failure that may require service. Turn the printer off, wait about 10 seconds, and then turn the printer on. If the error recurs, write down the error number, the problem, and a detailed description. Call 1-800LEXMARK for service.
Flash memory Hard disk with adapter Internal print server
The paper tray lowers unexpectedly
Check to see if your printer is out of paper or has a jam.
More than one sheet of paper is fed or a sheet is fed improperly
Remove the paper in the printer paper path, and check the stack to ensure the paper has been loaded properly. Be sure to remove the top and bottom sheets of each ream of paper that is loaded.

A jam occurs

Solving paper feed problems

Paper frequently jams

You are using paper that does not meet the printer specifications.
Use recommended paper and other specialty media.
High capacity feeder Printer memory
See the Card Stock & Label Guide available on the Lexmark Web site at www.lexmark.com for detailed specifications. For information that can help prevent jams from occurring, see the Clearing Jams Guide.
Solving print quality problems
To help isolate print quality problems, print the Print Quality Test Pages.
Replace the cartridge if the defects occur every: 38 mm (1.5 in.) 48 mm (1.9 in.) 97 mm (3.8 in.)
Marks occur down the page repeatedly in all colors:
You have loaded too much paper or too many envelopes.
Make sure the stack of paper you load does not exceed the maximum stack height indicated at the front of the tray or on the multipurpose feeder.
Replace the transfer roll if the defects occur

every 60 mm (2.4 in.)

1 Turn the printer off. 2 Press and. Hold them while you turn
the printer on, and until the Performing Self Test message appears. Config Menu appears.
Check the first transfer bellcranks and springs
or replace the image transfer unit if the defects occur every 101 mm (4 in.)
Replace the fuser if the defects occur every

148 mm (5.8 in.) Marks occur on every third or sixth page in any color: Replace the image transfer unit.
Guides in the selected tray are not set to the appropriate position for the size paper loaded.
Move the guides in the tray to the correct position.

3 Press

until and then press
Prt Quality Pgs appears,.
The paper has absorbed moisture due to high humidity.
Load paper from a fresh package. Store paper in its original wrapper until you load it.
The pages are formatted. The Printing Quality Test Pages message appears, then the pages print. The message remains on the operator panel until all the pages print. After the Print Quality Test Pages print, to exit the Config Menu:

White or colored lines

1 Replace the color print cartridge that is causing

the line.

2 If you still have the problem, replace the image
transfer unit and transfer roller.
The Paper Jam message remains after you remove the jammed paper.
Clear paper from the entire paper path, and then press.

4 Press

until Exit Config Menu appears, and then press to complete the procedure.
3 If you still have the problem, replace the fuser.
Streaked horizontal lines
Replace the print cartridge, the transfer roller, the image transfer unit, or fuser as needed. From the printer operator panel, print the repetitive defects guide to determine which component needs to be replaced.

Color misregistration

Color has shifted outside of the appropriate area or has been superimposed over another color area. Open the printer door, and make sure all four packaging tabs are removed. Top to Bottom or Left to Right:
The page that jammed does not reprint after you clear the jam.
Set Jam Recovery to Auto or On. For more information, see the Menus and Messages Guide

Streaked vertical lines

If paper is stiff, try feeding from another tray. Replace the print cartridge that corresponds to
the color displayed on the control panel.
1 Re-seat the cartridges by removing them from
the printer and then reinserting them.
Blank pages feed into the output bin.
Load the correct type media for your print job, or change the Paper Type to match the type of media loaded.
2 Invoke a Color Adjust operation from the

Settings Quality menu.

Print irregularities
Load paper from a fresh package in the paper

Repeating defects

Marks occur repeatedly only in one color and multiple times on a page:
Avoid textured paper with rough finishes.
Make sure the printer paper type, paper texture,
and paper weight settings match the type of paper you are using.
Make sure the Paper Type setting is set to

Transparency.

Replace the image transfer unit and transfer

roller.

Toner specks
Replace the print cartridge that corresponds to

Replace the fuser.

Print too light
Replace the transfer roller. Replace the image transfer unit. Replace the fuser. Call for service.
The default Paper Weight setting in the Paper
Menu is Normal. For paper less than 20 lb bond (75 g/m2), choose the Light setting. For 28 lb bond to 47 lb bond (105 g/m2 to 175 g/m2), choose the Heavy setting.
Select a different Toner Darkness setting from
the printer driver before sending the job to print.
Scroll to the Color Adjust setting in the Quality
Menu and press Select to adjust the color.
Load paper from a new package. Avoid textured paper with rough finishes. Make sure the paper you load in the trays is not
Shake the specified print cartridge to utilize the

remaining toner.

Print too dark
Transparency print quality is poor
Use only transparencies recommended by the

printers manufacturer.

Lexmark C78x Clearing Jams Guide

Avoiding jams

The following hints can help you avoid paper jams:

Clearing jams

Understanding jam messages
Message 200 Paper Jam 201 Paper Jam 202 Paper Jam 230 Paper Jam 24<x> Paper Jam 250 Paper Jam 27<x> Paper Jam What to do Clear Area B and Area T1. Clear Area D, Area K, and Area L. Clear Area K and Area L. Clear Area E and Area J. Clear Area B, Area C, and Area T<x>. Clear Area A and Area D. Clear Area M.

Area B

1 Open the left access door until it clicks into

place.

Use only recommended paper. Refer to the
Card Stock & Label Guide available on the Lexmark Web site at www.lexmark.com/ publications for more information about which paper provides optimum results for your printing environment. Do not remove paper trays while a job is printing. Wait for a Load Tray <x> or Ready message before you remove the tray. If you need detailed information before purchasing large quantities of customized paper, refer to the Card Stock & Label Guide. Do not load wrinkled, creased, or damp paper. Never mix media types within a tray. Flex, fan, and straighten paper before you load it. Do not overload the trays or the multipurpose feeder. Make sure the stack height does not exceed the maximum height indicated. Push all trays firmly into the printer after loading them. Make sure the guides in the trays are properly positioned for the size paper you have loaded. Do not send jobs to staple, hole punch, or offset for transparencies, labels, or card stock. We recommend that transparencies, labels, card stock, and envelopes not be sent to the optional mailbox or optional finisher. These specialty media types should be sent to the standard bin. If a jam should occur, clear the entire paper path. For more information, see Clearing the entire paper path.
2 Remove all visible paper. Remove any torn

paper from the printer.

3 Close the door. 4 Open Tray 1, and make sure the entire paper
stack is pushed all the way down into the tray.

Area A

1 Release the levers on each side of the
multipurpose feeder to lay it flat.

Area C

1 Open the 500-sheet drawer access door. Hold
the door down while removing jams.
2 Make sure the entire paper stack is loaded 2 Press the pick assembly release lever, and
remove all media and jams. correctly, and then close the door.
3 Return the feeder to its working position, and

reload your paper.

Area D
1 Open the front access door. 2 Hold down the front access door. Remove jams
in the rollers under the image transfer unit.

Area J

1 Remove the duplex tray J.
Clearing mailbox, finisher, or output expander jams (Area M)
1 Open the rear door of the 5-bin mailbox or

output expander.

2 Remove any jams, and then reinstall the tray.

Area T1

1 Open tray 1. 2 Remove any jams. 3 Make sure the paper is pushed all the way down
into the tray, and then close tray 1.

Area K

1 Open the lower right access door.
2 Pull the jam straight out, and then close the

Area E

1 Pull the duplex tray E completely out. Remove
any paper caught in the rollers or inside the printer.

Clearing fuser jams

1 Clear the paper path. If the jam error message

persists, go to step 2.

2 Remove any jams, and then close the door.
2 Open both the upper right and the lower right
access doors (Areas K and L).

Area L

1 Open the upper right access door.
2 Reinstall the duplex mechanism in the printer.

Area T<x>

1 Carefully open trays 2 through 4 (all 500-sheet
trays), and then remove jams.
CAUTION: The fuser assembly may be hot. Let
it cool before continuing.
2 Remove jams from the rollers, and then close

the door.

2 Make sure the paper is pushed all the way down
into the tray, and then close trays 2 through 4.
3 Pull down the latches. They slide toward the
center to release the fuser.
10 Slide the latches out, and then pull up to

refasten them.

4 Turn the printer off. Open the front cover.

11 Close the doors.

Clearing image transfer unit jams
1 Open the front access door and the left access
5 Remove all the print cartridges. 4 Pull the fuser out, and set it on a clean, flat

surface.

5 Unsnap the housing and set it aside. 2 While holding down the front access door,
insert a folded piece of paper as shown to clear the paper sensors under the image transfer unit. Make sure to clear the entire width of the paper path.
a Pull up slightly on the cartridge handhold. b Pull the cartridge straight out and use the
handle to lift it off the guides.
c Place the cartridges on a clean, flat surface

out of direct light.

6 Lift up the fuser roller cover and remove the
6 Release the latches to open the multipurpose
feeder (area A) all the way.
3 Close the left access door and the front access
door. If the jam persists, continue with step 4.
7 Close the fuser roller cover. 8 Snap the housing back onto the fuser. 9 Insert the fuser back into the printer.
7 Remove the image transfer unit.
a Raise the lever to unlock the image transfer
8 Look inside the printer. Remove all torn paper

or other jams.

c Lower the lever to lock the image transfer

unit into place.

9 Insert the image transfer unit back into the
b Pull down on the handle.

printer.

a Align the guides with the insertion grooves
and gently slide the unit in.
10 Return the multipurpose feeder to its working

position.

Reinstall all the print cartridges.
c Slide the image transfer unit out and place it
on a clean, flat surface.
b Rotate the handle up, and push gently to
Warning: Do not touch the transfer belt. Touching the belt will damage the image transfer unit. lock the unit in place.
11 Close the printer door. 12 Turn the printer on. The printer returns to a

Ready state.

If you still need help
1 Turn the printer off and then back on. 2 Contact your administrator or Help desk if you

need more assistance.