7
Troubleshooting
This chapter provides information about the following topics.
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●
Basic troubleshooting
●
Control-panel messages
●
Solving image-quality problems
●
Solving scanning (copying) image-quality problems
●
Repetitive image defect ruler
●
Solving paper-feed problems
●
Functional checks
●
Firmware update using a flash executable file
●
Troubleshooting tools
●
Service-mode functions
●
Main wiring
●
Component locations
109
Basic troubleshooting
When the device is connected to a grounded power source, the words Hewlett Packard appear with moving cursors to indicate
that the firmware code is loading, and the device motor rotates for approximately 5 seconds.
NOTE The flashing wavy lines that appear on the control-panel display during this period are normal.
Is Power-on successful?
Cause
Solution
No power is available because of a failed power source, cable, switch.
(The control panel display is blank.)
1.
Verify that the device is plugged in to a functional power source.
2.
Verify that the power cable is functional and that the power
switch is on.
3.
Verify that FU101 on the power supply is not open (also check
FU102 if present). See Main wiring on page 146.
4.
If all of these conditions are correct, replace the power supply.
See Power supply on page 91.
1.
Verify that the print cartridge is present.
2.
Verify that the device doors are closed.
3.
Verify that media is loaded in the paper input tray. See Loading
input trays on page 18.
4.
Verify that the device-path-paper sensors are functional.
5.
Verify that the wire-harness from the ECU is seated into the
motor connector.
6.
Verify that the motor is correctly mounted to the device chassis.
7.
If all of these conditions are correct, replace the ECU. See
Engine controller unit on page 98.
8.
If, after replacing the ECU, the device motor still does not rotate,
replace the motor. See Main motor on page 103.
Device motor does not rotate.
The motor rotates, but the lights are not on.
Does the device achieve the ready state?
Cause
Solution
The formatter is damaged or has a loose connection.
Verify that the formatter cables are properly connected. If all cables
are undamaged and seated correctly but the problem persists,
replace the formatter. See Formatter on page 94.
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Chapter 7 Troubleshooting
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The control panel should function without error messages.
Is the device ready?
Cause
Solution
An error message appears on the control-panel display.
Consult the list of common messages that appears later in this
chapter, to correct the error.
Control panel is not functional.
Verify that the control panel cable is seated into both the control panel
and the scanner formatter. Also check the connections between the
scanner motor controller board and the formatter. If all cables are
undamaged and seated correctly but the problem persists, replace
the control panel.
Print a demo page by selecting the reports menu and select Demo Page.
Does the demo page print?
Cause
Solution
The media does not move smoothly through the paper path.
Make sure that the media meets specifications detailed in the HP
LaserJet Printer Family Print Media Guide.
If the media is consistently jamming and the paper path is clear,
replace either the paper-pickup assembly or the fuser, depending on
where the jam occurs. See Paper-pickup assembly on page 107 or
Fuser on page 105.
The documents print with poor print quality.
See Solving image-quality problems on page 116.
Is the software installed correctly?
Cause
Solution
Software is not installed or an error occurred during software
installation.
Uninstall and then reload the device software. Make sure that the
correct installation procedure and the correct port setting are used.
Connect the USB cable between the device and the computer. Use a word-processing program to send a print job to the device.
Does the device print from the computer?
Cause
Solution
The cable is not connected correctly.
Reconnect the cable.
An incorrect driver is selected.
Select the correct driver.
Other devices are connected to the USB port.
Disconnect the other devices and try again to print.
A problem exists in the device manager.
Check the computer system settings and fix any device problems.
The formatter has failed.
Replace the formatter. See Formatter on page 94.
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Basic troubleshooting
111
Initiate a scan from either the computer’s basic desktop software or from the device.
Does the device scan to the computer?
Cause
Solution
Other devices are connected to the USB port.
Disconnect the other devices and try again to scan.
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Chapter 7 Troubleshooting
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Control-panel messages
The majority of the control-panel messages are intended to guide the user through typical operation.
The control-panel messages indicate the status of the current operation, and include a page count on
the second line of the display, if appropriate. When the device is receiving print data or scanning
commands, control-panel messages indicate this status. In addition, alert messages, warning
messages, and critical error messages indicate situations that might require some action.
Alert and warning messages
Alert and warning messages appear temporarily and might require the user to acknowledge the
message by pressing Menu/Enter to resume or by pressing Cancel to cancel the job. With certain
warnings, the job might not complete or the print quality might be affected. If the alert or warning message
is related to printing and the auto-continue feature is on, the device will attempt to resume the printing
job after the warning has appeared for 10 seconds without acknowledgement.
Control panel message
Description
Recommended action
Device error Press [OK]
The device experienced an internal
communication error.
This is a warning message only. Job output
might be affected.
Jam in print paper path
The device has detected a jam in the paper
path.
Clear the jam from the area indicated on the
device control panel, and then follow the
control panel instructions.
The device could not print the current page
because of its complexity.
Press Menu/Enter to clear the message.
alternates with
Open door and clear jam
Page too complex Press [OK]
Allow the device to finish the job, or press
Cancel to cancel the job.
Printer jam clear paper path
The device has detected a jam in the input
trays.
Clear the jam from the area indicated on the
device control panel, and then follow the
control panel instructions.
Scanner error
The device has detected a scan module error
Turn the device off and then on again.
Settings cleared
The device has cleared job settings.
Re-enter any appropriate job settings.
Critical error messages
Critical error messages can indicate some kind of failure. Restarting the device might fix the problem.
Control-panel display
Error code number
Description
Action
Engine comm. Error
None
The device has experienced an
internal hardware error.
1.
Turn off the power by using
the power switch, and then
wait at least 30 seconds.
2.
If a surge protector is being
used, remove it. Plug the
device directly into the wall
socket.
3.
Turn on the power and wait
for the device to initialize.
Error Turn off then on
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54.1C
The device has experienced an
internal hardware error.
Turn off the power by using the
power switch, wait at least 30
Control-panel messages
113
Control-panel display
Error code number
Description
Action
seconds, and then turn on the
power and wait for the device to
initialize.
If a surge protector is being used,
remove it. Plug the device directly
into the wall socket. Use the
power switch to turn the device
on.
Fuser Error Turn off then on
Fuser Error Turn off then on
Fuser Error Turn off then on
Fuser Error Turn off then on
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50.1
50.2
50.3
50.8
Chapter 7 Troubleshooting
The device has experienced an
internal hardware error.
The device has experienced an
internal hardware error.
The device has experienced an
internal hardware error.
The device has experienced an
internal hardware error.
1.
Turn off the power by using
the power switch, and then
wait at least 30 seconds.
2.
If a surge protector is being
used, remove it. Plug the
device directly into the wall
socket.
3.
Turn on the power and wait
for the device to initialize.
1.
Turn off the power by using
the power switch, wait at
least 30 seconds, and then
turn on the power and wait
for the device to initialize.
2.
If a surge protector is being
used, remove it. Plug the
device directly into the wall
socket. Use the power
switch to turn the device on.
1.
Turn off the power by using
the power switch, wait at
least 30 seconds, and then
turn on the power and wait
for the device to initialize.
2.
If a surge protector is being
used, remove it. Plug the
device directly into the wall
socket. Use the power
switch to turn the device on.
1.
Turn off the power by using
the power switch, wait at
least 30 seconds, and then
turn on the power and wait
for the device to initialize.
2.
If a surge protector is being
used, remove it. Plug the
device directly into the wall
socket. Use the power
switch to turn the device on.
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Control-panel display
Error code number
Description
Action
Fuser Error Turn off then on
50.9
The device has experienced an
internal hardware error.
1.
Turn off the power by using
the power switch, wait at
least 30 seconds, and then
turn on the power and wait
for the device to initialize.
2.
If a surge protector is being
used, remove it. Plug the
device directly into the wall
socket. Use the power
switch to turn the device on.
Scanner Error Turn off then on 52.2
The device has experienced a
laser scanner error.
1.
2.
Turn off the power by using the
power switch, wait at least 30
seconds, and then turn on the
power and wait for the device to
initialize.
If a surge protector is being used,
remove it. Plug the device directly
into the wall socket. Use the
power switch to turn the device
on.
Event-log codes
These codes appear in the event-log section of the configuration report. Use this table to associate an
event-log code with a description of the event.
Table 7-1 Event-log codes
Event code
Description
13.0002
Paper Jam
Paper jam in input path
13.0004
Paper Jam
Paper jam in output path
13.000D
Paper Out
Tray empty
21.0000
Page Too Complex
Video under run
21.0000
Page Too Complex
55.0000
Eng. Comm. Errorx
Engine communication fatal error
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Control-panel messages
115
Solving image-quality problems
If the problem occurs when printing, see Solving print image-quality problems on page 116.
If the problem occurs when copying or scanning, see Solving scanning (copying) image-quality
problems on page 124.
NOTE Some image-quality problems can be isolated by performing device functional tests.
See Functional checks on page 135. Image quality problems can also be caused by using cables
that are not certified USB-Hi speed cables.
Checking the print cartridge
Image-formation defects are frequently the result of problems in the print cartridge. If the source of the
defect is not immediately evident, always replace the print cartridge before troubleshooting image
defects.
Use the following checklist to make sure that the print cartridge is still operable.
●
Make sure that the print cartridge is seated properly.
●
Check the print cartridge to see if it has been disassembled or refilled.
●
Inspect the print cartridge to see if toner is leaking through worn seals.
●
Check the surface of the photosensitive drum in the cartridge to see if it has been damaged or
scratched. Touching the drum contaminates the photosensitive surface and can cause spotting
and image defects.
●
Blurred areas on printed pages indicate that the photosensitive drum in the cartridge has been
overexposed to light. Because overexposure to light causes permanent damage to the
photosensitive drum, the cartridge should be replaced.
To redistribute the toner in the print cartridge
Before installing a new print cartridge or when the toner begins to run low, redistribute the toner by
rotating the cartridge back and forth five or six times.
Solving print image-quality problems
Use the following tables to help solve problems with printed pages.
NOTE Some image-quality problems can be isolated by performing device functional tests.
See Functional checks on page 135. Image-quality problems can also be caused by using cables
that are not certified USB-Hi speed cables.
Print image-quality problems
Pages do not print.
116
Cause
Solution
The device is not plugged in, or the power switch is not on.
Make sure that the device is plugged into a working wall outlet
or power strip and that the power switch is turned on.
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Pages do not print.
Cause
Solution
The computer cable is loose.
Check that the USB cable between the device and the
computer is securely connected.
The tape was not removed from the print cartridge.
Remove the print cartridge, remove the tape, and reinstall the
print cartridge.
The print cartridge has reached end of life.
Replace the print cartridge.
The media does not meet HP specifications (for example, it is Make sure that the media meets specifications detailed in
too moist or too rough).
the HP LaserJet Printer Family Print Media Guide.
Parts of the page around the edges are not printing.
Cause
Solution
The device cannot print to the edge of the paper. The device
has minimum margins on each edge of 6 mm (0.25 inch).
To fit the image into this printable area, slightly reduce the size
of the image.
The reduction setting is set incorrectly.
Check the reduction setting in the “Print” or “Setup” window
from within the program that you are using.
Toner specks appear on the printed page.
.
Cause
Solution
The media does not meet HP specifications (for example, it is Make sure that the media meets specifications detailed in
too moist or too rough).
the HP LaserJet Printer Family Print Media Guide.
The print path needs to be cleaned.
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Clean the print path. See Cleaning the device on page 36.
Solving image-quality problems
117
Characters are only partially printed (also referred to as dropouts).
Cause
Solution
A single sheet of paper is defective.
Try reprinting the job.
The print density needs to be adjusted.
Adjust the print density.
The moisture content of the paper is inconsistent, or the paper
has moist or wet spots on the surface.
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The paper was damaged by inconsistent manufacturing
processes.
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
Draft mode or EconoMode is selected in the driver.
Try the normal or best setting.
The print cartridge is defective.
Replace the print cartridge.
Vertical lines appear on the printed page.
118
Cause
Solution
The priority input tray is not in place.
Adjust the priority input tray.
The photosensitive drum inside the print cartridge is scratched.
Replace the print cartridge.
The fuser is damaged or has an obstruction.
Replace the fuser. See, Fuser on page 105.
Chapter 7 Troubleshooting
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The printed page has a gray background.
Cause
Solution
The priority input tray is not in place.
Adjust the priority input tray.
The print density setting is too high.
Decrease the amount of background shading.
The media basis-weight is too high.
Change the media to a lower basis-weight.
The humidity level is too low.
Very low humidity can increase the amount of background
shading. Move the device to a different location, or decrease
the background shading. If this happens during copying, set
the light/dark setting to a light value.
The print cartridge needs to be replaced.
Replace the print cartridge.
Toner smears appear on the printed page.
Cause
Solution
If the toner smears appear on the leading edge of the media,
the media guides are dirty.
Wipe the media guides with a dry, lint-free cloth.
The media does not meet HP specifications (for example, it is Make sure that the media meets specifications detailed in
too moist or too rough).
the HP LaserJet Printer Family Print Media Guide.
The print cartridge needs to be replaced.
Replace the print cartridge.
The fuser temperature is too low. The fuser temperature varies
according to the type of media being used.
In the Paper/Quality tab of the driver, under Type is:, select
the appropriate media type from the drop-down list.
If the error persists, replace the ECU. See Engine controller
unit on page 98.
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Solving image-quality problems
119
The toner is loose, and it does not stay attached to the printed page.
Cause
Solution
The inside of the device is dirty.
Clean the print path. See Cleaning the device on page 36.
The media does not meet HP specifications (for example, it is
too moist or too rough).
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The driver is not set for the correct media.
On the Paper/Quality tab of the printer driver, under
Type is:, select the correct media type from the dropdown list.
The power strip is not working correctly.
Plug the device directly into an working ac outlet.
The fuser temperature is too low. The fuser temperature varies
according to the media type being used.
In the Paper/Quality tab of the printer driver, under Type is:,
select the correct media type from the drop-down list.
If the error persists, replace the ECU. See Engine controller
unit on page 98.
The fuser film is torn or has holes.
Replace the fuser. See Fuser on page 105.
The fuser film is damaged.
Check the fuser film for tears or holes. Replace the fuser if
necessary. See Fuser on page 105.
The print cartridge needs to be replaced.
Replace the print cartridge.
Repetitive vertical defects appear on the printed page.
Cause
Solution
If the repetitive mark occurs at equal distance between marks, Use the defect ruler to identify the spacing. Check the
either the print cartridge or a device roller is damaged.
appropriate component and replace if necessary. See
Repetitive image defect ruler on page 130.
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Chapter 7 Troubleshooting
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Repetitive vertical defects appear on the printed page.
Cause
Solution
The internal parts have toner on them.
If the defects occur on the back of the page, the problem will
probably correct itself after a few more printed pages.
Otherwise, clean the device. See Cleaning the device
on page 36.
The driver is not set for the correct media.
In the Paper/Quality tab of the printer driver, under Type
is:, select the correct media type from the drop-down list.
(This affects the current print job only.)
Characters are poorly formed and are producing hollow images.
Cause
Solution
The media is too slick.
Try a different media. Make sure that the media meets
specifications detailed in the HP LaserJet Printer Family Print
Media Guide.
The driver is not set for the correct media.
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In the Paper/Quality tab of the printer driver, under Type
is:, select the correct media type from the drop-down list.
(This affects the current print job only.)
Solving image-quality problems
121
Pages are skewed (crooked).
Cause
Solution
The media is loaded incorrectly.
Reload the media, and make sure that the media guides are
not too tight or too loose against the media stack.
The media guides are broken or missing.
Replace the media input tray or the paper-pickup assembly.
See, Media input tray on page 78 or Paper-pickup assembly
on page 107.
The input tray is too full.
Remove some of the sheets. The HP LaserJet M1005 MFP
main input tray can hold up to 150 sheets of 75-g/m2 (20-lb)
bond-weight paper (less for heavier paper).
The type and quality of media does not meet HP specifications. Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The printed page has curls or waves.
122
Cause
Solution
Paper curl is inherent to the laser printing process; it occurs
when paper is subjected to heat.
Curled paper tends to relax as it cools. Place the paper on a
flat surface while it is cooling.
The environment is too warm or too humid.
1.
Both high temperatures and high humidity levels cause
media to curl. Move the device to a different environment.
2.
Use a different media. Make sure that the media meets
specifications detailed in the HP LaserJet Printer Family
Print Media Guide.
The media was in the input tray for too long.
Turn the stack of media over and put it back in the tray. Rotate
the media 180° and put it back in the tray.
The fuser temperature is too high. The fuser temperature
varies according to the type of media being used.
Select a lighter-weight media type from the printer driver.
Chapter 7 Troubleshooting
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Large amounts of toner are scattered around the characters.
Cause
Solution
The media resistivity is too high.
1.
Use a different media. Make sure that the media meets
specifications detailed in the HP LaserJet Printer Family
Print Media Guide.
2.
Turn the stack of media over and put it back in the tray.
3.
Use media that is designed for laser printers.
Vertical white stripes appear.
Cause
Solution
The media does not meet HP specifications (for example, it is Make sure that the media meets specifications detailed in
too moist or too rough).
the HP LaserJet Printer Family Print Media Guide.
The toner is low.
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Gently shake the print cartridge back and forth to redistribute
the toner.
Solving image-quality problems
123
Solving scanning (copying) image-quality problems
Use the following tables to help solve problems with scanned or copied pages.
NOTE Some image-quality problems can be isolated by performing device functional tests.
See Functional checks on page 135. Image quality problems can also be caused by using cables
that are not certified USB-Hi speed cables.
Scanning (copying) image-quality problems
Pages do not print.
Cause
Solution
The device is not plugged in, or the power switch is not on.
Make sure that the device is plugged into a working wall outlet
or power strip and that the power switch is turned on.
The computer cable is loose.
Check that the cable between the device and the computer is
securely connected.
The tape was not removed from the print cartridge.
Remove the print cartridge, remove the tape, and reinstall the
print cartridge.
The print cartridge has reached end of life.
Replace the print cartridge.
The media does not meet HP specifications (for example, it is
too moist or too rough).
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The original was loaded upside-down.
Load the original with the side to be scanned facing down on
the flatbed.
Pages are skewed (crooked).
Cause
Solution
The media is loaded incorrectly.
Reload the media, and make sure that the media guides are
not too tight or too loose against the media stack.
The media guides are broken or missing.
Replace the media input tray or the paper-pickup unit. See
Media input tray on page 78 or Paper-pickup assembly
on page 107.
The type and quality of media does not meet HP specifications. Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
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Parts of the page around the edges are not printing.
Cause
Solution
The device cannot print to the edge of the paper. The device
has minimum margins on each edge of 6 mm (0.25 inch).
To fit the image into this printable area, slightly reduce the size
of the image.
If copying, the reduction setting is incorrect.
Copied images will be clipped if the image on the original is too
close to the edge of the original.
The paper size setting is incorrect.
Set the correct page size on the control-panel menu.
Vertical white stripes appear.
Cause
Solution
The media does not meet HP specifications (for example, it is Make sure that the media meets specifications detailed in
too moist or too rough).
the HP LaserJet Printer Family Print Media Guide.
The toner is low.
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Gently shake the print cartridge back and forth to redistribute
the toner.
Solving scanning (copying) image-quality problems
125
Copies or scanned images are too light or too dark.
Cause
Solution
The contrast is not set correctly.
1.
Adjust the contrast and resolution settings on the controlpanel menu.
2.
Check that the contrast and resolution settings are
correct. See the user guide for more information.
The original image is very light or very dark.
Adjust the resolution and contrast setting(s) on the controlpanel menu.
The scanned image is too light or too dark because the original
was on colored paper.
If the original was on a colored paper, including brown recycled
paper, the text might not be clear. Adjust the resolution,
contrast, and brightness settings.
The printed page has a gray background.
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Cause
Solution
The priority input tray is not in place.
Adjust the priority input tray.
The print density setting is too high.
Decrease the amount of background shading by using the print
driver.
The lighter/darker setting is incorrect. Some "white" media
might produce a greyish background at the default lighter/
darker settings.
Adjust the lighter/darker setting to a lighter level.
The media basis-weight is too high.
Change the media to a lower basis-weight.
The humidity level is too low.
Very low humidity can increase the amount of background
shading. Move the device to a different location.
The print cartridge needs to be replaced.
Replace the print cartridge.
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Vertically-aligned black streaks or smears appear on successive pages.
Cause
Solution
A component is damaged. (For example, the photosensitive
drum inside the print cartridge is scratched.)
1.
Replace the print cartridge if it is damaged and if
maintenance procedures do not improve print quality.
2.
Replace the scanner assembly. See Scanner assembly
on page 67.
Scanned images have black dots or streaks.
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Cause
Solution
The scanner glass is dirty.
Clean the flatbed glass. See Cleaning the device on page 36.
The toner drum in the print cartridge is damaged.
Replace the print cartridge.
A problem exists with the scanner assembly.
Replace the scanner assembly. See Scanner assembly
on page 67.
Solving scanning (copying) image-quality problems
127
Scanned text is not clear.
Cause
Solution
The contrast, resolution, or brightness needs to be adjusted
before scanning.
1.
Adjust the contrast and resolution settings.
2.
Check that the contrast and resolution settings are
correct. See the user guide section for more information.
The original is on colored paper.
If the original is on colored paper, including brown recycled
paper, the text might not be clear. Try adjusting the resolution,
contrast, and brightness settings from the scan application.
There is a problem with the scanner assembly.
Replace the scanner assembly. See Scanner assembly
on page 67.
Images are scanning at a reduced size.
Cause
The HP software settings are set to reduce the scanned image.
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Chapter 7 Troubleshooting
Solution
Adjust the settings in the HP LaserJet Scan software.
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Large amounts of toner are scattered around the characters.
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Cause
Solution
The media resistivity is too high.
1.
Use a different media type. Make sure that the media
meets specifications detailed in the HP LaserJet Printer
Family Print Media Guide.
2.
Turn the stack of media over and put it back in the tray.
3.
Use media that is designed for laser printers.
Solving scanning (copying) image-quality problems
129
Repetitive image defect ruler
Use the repetitive image-defect ruler to help solve image quality problems. Place the top line on the
ruler next to the first occurrence of the defect on the page. Find the mark that points to the next instance
of the defect to identify the component that is causing the defect.
First occurrence of print defect (0.00 inches)
Print cartridge 30.8 mm (1.21 inches)
Print cartridge 37.7 mm (1.48 inches)
Fuser (Fixing assembly) 41.0 mm (1.61 inches)
Transfer roller 46.3 mm (1.82 inches)
Paper pick-up assembly 55.2 mm (2.17 inches)
Fuser (Fixing assembly) 56.5 mm (2.22 inches)
Print cartridge 76.3 mm (3.00 inches)
Figure 7-1 Repetitive image defect ruler
NOTE The repetitive image defect ruler is for reference only and may not display or print to
exact scale. Use a measuring device to determine the spacing between repeating image defects.
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Solving paper-feed problems
Use the information in this section to solve problems that are related to moving paper or documents
through the device.
CAUTION
Always try to remove a jam in the direction that the media feeds through the device.
Jams occur in the device
Occasionally, media becomes jammed during a print job. Try the following remedies before you attempt
to clear the jam:
●
Make sure that the media meets specifications.
●
Make sure that the media is not wrinkled, folded, or damaged.
●
Make sure that the device is clean. See Cleaning the device on page 36.
●
Make sure that the input trays are loaded properly and are not too full. See Loading input trays
on page 18.
To clear a jam
CAUTION Jams might result in loose toner on the page. If toner falls on clothing, wash it in cold
water. Hot water will permanently set the toner into the fabric. If toner is on your hands, wash
them in cold water.
Never use a sharp object, such as a pencil or scissors, to remove jammed media.
1.
Open the print-cartridge door.
Figure 7-2 Clear a jam in the device base (1 of 3)
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Solving paper-feed problems
131
2.
Grasp the handle on the print cartridge, remove the print cartridge, and set it aside.
Figure 7-3 Clear a jam in the device base (2 of 3)
CAUTION To prevent damage to the print cartridge, do not expose it to light any longer
than necessary. Place the print cartridge in a paper bag or other opaque container until you
can place it back in the device.
3.
With both hands, grasp the side of the media that is most visible (this includes the middle), and
carefully pull it free from the device.
NOTE Always try to remove a jam towards the way it would move through the paper path.
Figure 7-4 Clear a jam in the device base (3 of 3)
4.
After the jammed media is removed, replace the print cartridge, and close the print-cartridge door.
5.
After clearing a jam, turn off the device, and then turn it on again.
Solving print paper-feed problems
Use the following tables to solve paper-feed problems when printing.
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Print paper-feed problems
Pages are coming out curled or wrinkled.
Cause
Solution
Paper curl is inherent to the laser printing processes, and
occurs when paper is subjected to heat. Paper curl tends to
relax as the paper cools while resting on a flat surface.
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide. Remove the
media, turn it over, and reload it.
Paper is curled or wrinkled when printing.
In the printer driver, on the Paper/Quality tab, select a lighterweight media type, such as Light <75 g/m2, to reduce the
fuser temperature.
Paper is curled when copying.
Try an alternate media.
Paper is not stored properly.
Whenever possible, store paper in its sealed ream at room
temperature.
The media is too long for the device output bin.
Use the long media extension.
Print is misaligned on the page (skewed pages).
Cause
Solution
The media input tray is overfilled.
Remove some of the media.
The paper guides are not set correctly, are broken, or are
missing.
Be sure to center the paper with the side media guides. Verify
that the guides are not adjusted too tightly or too loosely
against the paper. Check for broken or missing guides and
replace as necessary.
The paper weight or surface finish does not meet HP
specifications.
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The device feeds multiple sheets or jams frequently from the main input tray or priority input tray.
Cause
Solution
Paper guides are not adjusted properly.
Slide the guides against the sides of the stack in the media
input tray or the priority input tray to center the paper. Make
sure the guides are not adjusted too tightly.
Paper was not removed from the main input tray before refilling Always remove paper from the main input tray before refilling
the tray.
it.
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The main input tray or priority input tray is overfilled.
Remove some of the sheets. The main input tray can hold up
to 150 sheets of 60-g/m 2 (16-lb) bond-weight paper.
The paper was poorly cut by the manufacturer and is sticking
together.
“Break” the ream of paper by curving it into an upside-down ushape; this can effectively decrease multifeeds. Also try turning
the paper around to feed the opposite end first, or use a
different type of paper.
The paper does not meet HP specifications for print media.
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The output capacity was exceeded in the paper output bin.
Do not allow more than 125 sheets of 75 g/m2 (20-lb) bondweight paper (less for heavier paper) to fill the paper output
bin.
The pickup roller is dirty or damaged.
Clean the pickup roller.
Solving paper-feed problems
133
The device feeds multiple sheets or jams frequently from the main input tray or priority input tray.
Cause
Solution
Replace the pickup roller. See Device pickup roller
on page 75.
The separation pad is dirty or damaged.
Clean the separation pad.
Replace the separation pad. See Device separation pad
on page 73.
A sensor is not operating properly.
134
Chapter 7 Troubleshooting
Check the sensors to make sure that none are jammed. If a
sensor cannot be corrected, replace the sensor.
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Functional checks
Use the following procedures to help diagnose and solve problems that occur in the print engine.
Half self-test functional check
The purpose of the half self-test check is to determine which image-formation process is malfunctioning.
The image-formation process can be subdivided into the following stages:
●
conditioning stage (charges the drum)
●
writing stage (writes a latent image to the drum with the laser)
●
development stage (forms a toner image on the drum)
●
transfer stage (transfers the image to paper)
●
separation stage (separates the media from the drum)
●
fusing stage (applies heat and pressure to make the image on paper permanent)
●
cleaning stage (removes excess toner from the drum)
To perform a half self-test check
1.
Print a configuration report. See Troubleshooting tools on page 140.
2.
Open the print cartridge door after the paper advances halfway through the device (about 5 seconds
after the motor begins rotation). The leading edge of the paper should have advanced past the
print cartridge.
3.
Remove the print cartridge.
4.
Open the print cartridge drum shield to view the drum surface. If a dark and distinct toner image is
present on the drum surface, assume that the first three functions of the image-formation process
are functioning (through the development stage). Troubleshoot the failure as a transfer or fusing
problem.
To perform other checks
If, during the half self-test check, no image is present on the photosensitive drum, perform these checks:
1.
Make sure that you removed the entire length of the sealing tape from the print cartridge before
you installed the cartridge.
2.
Perform a drum-rotation functional check. (See Drum rotation functional check on page 136.)
3.
Perform a high-voltage power-supply check. (See High-voltage contacts check on page 137.)
If the checks indicate a transfer problem, replace the transfer roller. If the checks indicate a fuser
problem, first make sure to check the two wire-harness connectors (J102 and J204; callout 1) on the
power supply.
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Functional checks
135
Figure 7-5 Check the fuser connectors on the fuser
Figure 7-6 Check the fuser connectors on the power supply
Drum rotation functional check
The photosensitive drum, located in the print cartridge, must rotate in order for the print process to work.
The photosensitive drum receives its drive from the main drive assembly.
136
Chapter 7 Troubleshooting
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NOTE This test is especially important if refilled print cartridges have been used.
1.
Open the print-cartridge door.
2.
Remove the print cartridge.
3.
Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark.
4.
Install the print cartridge and close the print-cartridge door. The startup sequence should rotate the
drum enough to move the mark.
5.
Open the print-cartridge door and inspect the gear that was marked in step 3. Verify that the mark
moved.
If the mark did not move, inspect the main drive assembly to make sure that it is meshing with the printcartridge gears. If the drive gears appear functional and the drum does not move, replace the print
cartridge.
High-voltage contacts check
The high-voltage contacts in the device must have a good connection with the contacts on the print
cartridge to provide the necessary voltages for the image-formation processes.
To check the print-cartridge contacts
Remove the print cartridge and visually inspect the three connection points (callout 1) on the end of the
print cartridge. If they are dirty or corroded, clean the connection. If they are damaged, replace the print
cartridge.
NOTE Use only isopropyl alcohol to clean the connections.
Figure 7-7 Print-cartridge high-voltage contacts
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Functional checks
137
To check the high-voltage connector pins
The assembly has three spring-loaded pins (callout 1) to contact the print cartridge. Verify that the pins
are not dirty or corroded and that the spring-loading action is functional. If the pins are dirty or obstructed,
clean them using a dry cloth. If they are damaged, replace the device.
Figure 7-8 High-voltage contacts
138
Chapter 7 Troubleshooting
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Firmware update using a flash executable file
The configuration page lists the firmware version of the device. On the flash-memory-based device,
update the firmware code by downloading the latest flash executable file for the device and running the
program according to the readme instructions that come with it (see http://www.hp.com/support/
LJm1050. Turn the device off and then on before running the executable file. If the firmware becomes
corrupted or fails (usually because of an interruption when attempting to update the firmware), try to
upgrade the firmware a second time. If the device still does not function, it will require a formatter
replacement.
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Firmware update using a flash executable file
139
Troubleshooting tools
Use the control panel to print configuration reports and demonstration pages. The configuration report
shows the settings that have been selected from the control panel. Printing a configuration report is also
considered a "self test" for the device, although any of the reports can serve this purpose. A printout of
the control-panel menu structure is a useful reference if you alter settings in the menu.
Printing a configuration report, demonstration page, or menu
structure
140
1.
Press Menu/Enter.
2.
Use the < or > button to select Reports and then press Menu/Enter.
3.
Use the < or > button to select either Config report , Demo Page , or Menu Structure and then
press Menu/Enter. The device exits the Menu settings and prints the report.
Chapter 7 Troubleshooting
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Service-mode functions
Use the following information to perform system-wide reset procedures and to adjust certain global
settings such as the country/region.
Secondary service menu
Use the secondary service menu to perform various tests and print service reports. The following is a
hierarchical diagram of the secondary service menu.
Main menu
Submenu
Submenu
2ndary Service
Service Reports
Cont. Self-Test
Cont Copy
Error Report
Cal graphics
High speed USB
NOTE Prints graphics used for
calibrating the scanner.
Off
On
Show firmware version
Button test
Display test
NOTE Displays the date code
of the installed firmware.
NOTE Use this item to test the
control-panel buttons.
NOTE Use this item to test the
control-panel display.
To gain access to the secondary service menu
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1.
Make sure that the control-panel display reads Ready.
2.
Press Menu/Enter.
3.
Press < and OK buttons simultaneously.
4.
When the message Main Menu 2ndary Service appears on the display, press OK.
5.
Use the < or > button to navigate the secondary service menu.
6.
To exit the secondary service menu, press Cancel to return to the Ready display, and then
press cancel again.
Service-mode functions
141
Adjusting the country/region code parameters
Three situations can occur that necessitate changing the country/region or language settings for the
device:
1.
The customer has moved to a different country/region from where the device was purchased.
2.
The information has been erased because of an NVRAM initialization, or the parameters are set
to "undefined."
3.
The formatter was replaced.
Use the information in the following sections to adjust the country/region and language settings.
To change the country/region from one location to another
NOTE This procedure will restore the NVRAM defaults.
1.
Turn off the device.
2.
Hold down > and Cancel, and then turn on the device.
3.
Release > and Cancel.
4.
Select Language, and then press OK.
5.
Select Location, and then press OK.
To set the language and location if none is set
If the language and location have been erased because NVRAM has been initialized or the formatter is
replaced, the device automatically prompts for the language and the location when it is turned on.
1.
Press < or > until the correct language appears.
2.
When the correct language appears, press Menu/Enter, and then press 1 to confirm the selection.
If the location also needs to be set, the device automatically prompts for the location.
3.
Press < or > until the correct country/region appears.
4.
When the correct country/region appears, press Menu/Enter, and then press 1 to confirm the
selection.
NVRAM init
NVRAM init returns most stored parameters to the factory settings. All menu settings are reset to factory
default values. Items that are not reset include:
142
●
page counts
●
factory settings such as formatter number and serial number
●
all localization settings, including language and country/region
Chapter 7 Troubleshooting
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To perform NVRAM init
1.
Press OK to enter the menu.
2.
Press < or > until Service appears.
3.
Press OK.
4.
If Restore Defaults is displayed, press OK.
5.
Press OK to reset the defaults.
6.
When Ready appears on the control-panel display, the NVRAM init is complete.
System settings for localized products
NOTE The list of available country/regions includes all of the country/regions listed in Table
7-2 System settings on page 143 and Chile (default media size letter, default date format
ddmmyy, and default time format am/pm), North Africa (default media size A4, default date format
ddmmyy, and default time format 24 hour), Jordan (default media size A4, default date format
ddmmyy, and default time format am/pm), and Lebanon (default media size A4, default date
format ddmmyy, and default time format am/pm).
The default system settings vary for each country/region. The following table lists the default system
settings for each country/region. Be sure to reset any user-defined settings that differ from these settings.
Table 7-2 System settings
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Country/region
Default media size1
Argentina
Letter
Australia
A4
Austria
A4
Belgium
A4
Brazil
A4
Bulgaria
A4
Canada
Letter
Chile
Letter
China
A4
Croatia
A4
Czech Republic
A4
Denmark
A4
Finland
A4
France
A4
Germany
A4
Greece
A4
Hong Kong SAR
A4
Service-mode functions
143
Table 7-2 System settings (continued)
144
Country/region
Default media size1
Hungary
A4
India
A4
Indonesia
A4
Ireland
A4
Israel
A4
Italy
A4
Jordan
A4
Korea
A4
Lebanon
A4
Luxemburg
A4
Malaysia
A4
Mexico
Letter
Netherlands
A4
New Zealand
A4
North Africa
A4
Norway
A4
Pakistan
A4
Peru
Letter
Philippines
Letter
Poland
A4
Portugal
A4
Romania
A4
Russia
A4
Singapore
A4
Slovak Republic
A4
South Africa
A4
Spain
A4
Sri Lanka
A4
Sweden
A4
Switzerland
A4
Taiwan
A4
Thailand
A4
Turkey
A4
United Kingdom
A4
Chapter 7 Troubleshooting
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Table 7-2 System settings (continued)
1
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Country/region
Default media size1
United States
Letter
Vietnam
A4
The default media-size setting that is listed is the same for the printer input trays.
Service-mode functions
145
Main wiring
Figure 7-9 Main wiring, HP LaserJet M1005 MFP scanner assembly
146
Chapter 7 Troubleshooting
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Figure 7-10 Main wiring, HP LaserJet M1005 MFP device base
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Main wiring
147
Component locations
1
4
2
3
5
6
7
8
11
5
9
10
5
12
13
5
14
Figure 7-11 HP LaserJet M1005 MFP component locations (1 of 2)
148
1
Scanner assembly
2
Assembly link, left
3
Assembly link, right
4
Spring, pop-up
5
Screw, M3X0.5
6
ESD shield
7
Screw, M3X0.5
8
Plate, I/O
9
Shield, safety
10
PCA, formatter
11
Printer base
12
Cover, right
13
Output support bin
14
Main input tray (tray 1)
Chapter 7 Troubleshooting
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1
2
3
4
5
Figure 7-12 HP LaserJet M1005 MFP component locations (2 of 2)
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1
Scanner lid
2
Control panel
3
LJM1005 scanner flatbed assembly
Component locations
149
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