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PRINT DEFECTS

Background scatter
Problem Possible Cause Solution
background scatter Toner cartridge is defective Install a new toner cartridge
background scatter Fuser assembly is bad Do a half-way test to determine if it is the fuser
background scatter Transfer Roller is dirty or worn. A worn Transfer Roller can cause background scatter due to improper bias voltages Replace the transfer roller.
LaserBlack lines - parallel or perpendicular
Problem Possible Cause Solution
black lines - parallel or perpendicular If the lines are repeated at a consistent interval down the page, this is a repetitive defect. See the Repetitive Image Defect Ruler in the service manual to measure and determine source of lines.
Black page
Problem Possible Cause Solution
Blank page - all pages No toner is available for print Remove sealing tape on toner cartridge, or replace the toner cartridge if necessary.
Blank page - all pages Malfunctioning laser shutter Perform a half-way test and see if there is an image on the imaging drum. If there is no image on the drum, check the laser shutter for correct operation when inserting the toner cartridge.
Blank page - all pages No transfer roller voltage Perform a half-way test and see if there is an image on the imaging drum. If there is an image on the drum, make sure the transfer roller is installed. Without transfer roller voltage, toner cannot be attracted from the surface of the drum to the print media. Replace the transfer roller if necessary.
Blank page print defect - all pages
Problem Possible Cause Solution
Blank page - all pages No toner is available for print Perform a half-way test and see if there is an image on the imaging drum. If there is no image on the drum, check the laser shutter for correct operation when inserting the toner cartridge.
Blank page - all pages No transfer roller voltage Perform a half-way test and see if there is an image on the imaging drum. If there is an image on the drum, make sure the transfer roller is installed. Without transfer roller voltage, toner cannot be attracted from the surface of the drum to the print media. Replace the transfer roller if necessar.
Blank page - all pages No developing bias Perform a half-way test and see if there is an image on the imaging drum. If there is no image on the drum, clean the high-voltage power supply contacts. With no developing bias charge, toner is not attracted to the drum. Replace the engine controller board if necessary.
Blank page - all pages Defective laser scanner cable Perform a half-way test and see if there is an image on the imaging drum. If there is no image on the drum, low-level signals exchanged between the laser/scanner assembly and the engine controller board could theoretically affect laser output. Replace the laser/scanner cable assembly if necessary.
Blank page print defect - occasionally
Problem Possible Cause Solution
Blank page - occasional Multiple feeds The printer may be feeding two or more pages at once because the paper is difficult to separate. Flex the paper a bit to help separate before installing in printer..
Blank page - occasional Software configuration ,. network configuration Re-install printer driver. Check paper size settings in software. Check any software/network settings related to printing a blank separator page between jobs.
Blank page - occasional Malfunctioning paper pickup assembly The paper pickup solenoids can misfire and intermittently cause the pickup rollers to rotate an extra revolution. This will cause a blank page. Replace or repair paper pickup solenoids.
Blank spots
Problem Possible Cause Solution
Blank spotses Defective toner cartridge Replace the toner cartridge.
Blank spots Dirty laser scanner mirrors Clean the laser scanner mirrors. On some models, this is an advanced procedure; consult the service manual for instructions on accessing the laser scanner assembly.
Blank spots Contaminated or deformed transfer roller Replace the transfer roller.
Bubble print
Problem Possible Cause Solution
bubble print Defective toner cartridge Replace the toner cartridge.
bubble print Defective High Voltage Power Supply Replace the High Voltage Power Supply
bubble print Photosensitive drum inside toner cartridge is not grounded Check for proper mounting of the High Voltage Power Supply, and the HVPS ground contact on the toner cartridge. Check for proper seating of toner cartridge. Replace toner cartridge.
bubble print Paper does not meet specifications -- moisture content, conductivity, or surface finish may not work correctly with the electrophotographic process. Try a different paper type
Compressed print
Problem Possible Cause Solution
Compressed print Drive gear is broken or worn Inspect and replace the worn gear of assembly
Compressed print Toner cartridge bushings are too tight Replace the toner cartridge
Contamination on Back
Problem Possible Cause Solution
contamination on back Contamination inside printer 1. Print at least 10 pages to see if the problem goes away on its own.
2. Print a cleaning page (consult User's Guide/ Service Manual.)
3. Identify and clean the contaminated part, or better yet, replace the contaminated part if replacements are orderable.
4. If contamination continues, check toner cartridge for leaks. Replace cartridge.
contamination on back Print media does not meet printer specifications, or is stored improperly. 1. Print a few more pages to see if the problem corrects itself.
2. Turn over the stack of media in the tray. Also try rotating the media 180 degrees.
3. If the print media does not meet HP specifications, replace the paper, and advise the customer to use the recommended print media and store it properly.
Creases
Problem Possible Cause Solution
Creases Paper is loaded incorrectly. Make sure print media is loaded into tray correctly, and that the tray guides are adjusted properly to fit against the paper stack.
Creases Determine the cause by performing a half-way test to isolate the defective component. Replace defective component. Common possibilities include slipping paper pickup assembly, slipping feed assembly, slipping fuser assembly.
Curl
Problem Possible Cause Solution
Curl Print media does not meet printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself.
2. Turn over the stack of media in the tray. Also try rotating the media 180 degrees.
3. I the print media does not meet HP specs, replace the paper.
Curl Wrong fuser setting for print media type From the paper-handling menu on the control panel, change the fuser mode setting or choose another paper type from the printer driver.
Curl Wrong output bin Print to a different output bin (top or rear output bin).
Distorted Image
Problem Possible Cause Solution
Distorted image Defective engine controller board Replace the engine controller board
Distorted image Defective laser scanner Replace the laser scanner
Distorted image Poor connection of cables to the engine controller board Reseat the cables connected to the engine controller board
Distorted image Print media does not meet printer specifications or is stored improperly 1. Print a few more pages to see if the problem corrects itself.
2. Turn over the stack of media in the tray. Also try rotating the media 180°.
3. If the print media does not meet HP specifications, replace the paper, and advise the customer to use the recommended print media and store it properly
Dropouts
Problem Possible Cause Solution
Dropouts Failing toner cartridge, or wrong toner density setting Replace toner cartridge, or wrong toner density setting
Dropouts Failing upper fuser roller in fuser Replace fuser
Dropouts DC Controller is defective (low primary voltage) Replace the DC controller
Dropouts High Voltage Power Supply is defective Replace the high voltage power supply
Dropouts Transfer roller is defective Replace the Transfer Roller
Faded print with bubbles
Problem Possible Cause Solution
Fading print with bubbles Toner cartridge drum not grounded properly With no ground path, the drum cannot discharge. The negative charge on the drum repels toner and leaves a white page with bubble print. 1. Replace toner cartridge.
2. Check the drum ground spring and reconnect it, if necessary
. 3. Replace the engine controller board
Faded print
Problem Possible Cause Solution
Fading print Toner supply is low , failing Shake the cartridge gently to redistribute the toner, or replace the cartridge
Fading print Transfer roller is defective or incorrectly installed. If the Transfer roller loses conductivity, it cannot effectively pull toner from the drum to the paper Inspect the Transfer Roller for proper installation and contact. If the Transfer Roller is damaged, replace it
Fading print Laser mirror is dirty or shutter is not functioning Clean the scanner mirror. Check the Laser/Scanner shutter door for proper operation. If defective, replace the Laser/Scanner Assembly.
Fading print Print density is set incorrectly Change to a darker setting and retry printing.
Fading print EconoMode is on. (EconoMode saves toner by reducing the dot density. This may appear to be a print quality problem in some cases.) Turn EconoMode off. EconoMode settings are stored in either the printer driver or the job application.
Faulty registrations
Problem Possible Cause Solution
Faulty registration Paper guide on the paper tray is incorrectly adjusted. If the guide is pushing too tightly against the paper, it may be delayed in being pulled into the printer. If the guide is too loose, it may cause image skewing. Make sure that the paper guide is adjusted for the correct paper size and is locked into position.
Faulty registration Paper is being picked up skewed; worn pickup , feed, or registration rollers. Inspect all paper path rollers, looking for wear, cracks, or glazing. Replace worn rollers.
Faulty registration Paper tray is overloaded. If the tray is overloaded, the Pickup Rollers may not pick correctly. Reload proper amount of paper squarely in the tray. Review paper loading with the customer.
Gray background
Problem Possible Cause Solution
Gray background Faulty toner cartridge Replace the toner cartridge
Gray background High voltage power supply failure Replace high voltage power supply
Gray background Formatter failure Replace formatter
Gray background Wrong toner density setting From the print-quality menu on the control panel, adjust the toner density setting.
Horizontal black lines
Problem Possible Cause Solution
Horizontal black lines Defective laser scanner assembly or engine controller board 1. See the “Repetitive defect ruler”.
2. Reseat connectors on the laser scanner and engine controller board.
3. Replace the laser/scanner assembly followed by the engine controller board, if necessary
Horizontal smudges
Problem Possible Cause Solution
Horizontal smudges Paper path contamination or damagee. 1. See the Repetitive defect ruler.
2. Check the toner cartridge and replace it if necessary.
3. Check the fuser and replace it, if necessary.
Horizontal white lines
Problem Possible Cause Solution
Horizontal white lines Defective toner cartridge Replace the toner cartridge
Horizontal white lines Dirty / defective laser scanner assembly Clean laser scanner mirrors. Replace scanner assembly if necessary.
Horizontal white lines Defective DC controller Replace DC controller
Image skew
Problem Possible Cause Solution
Image skew Pickup roller is worn. Paper is being fed at a skewed angle. Inspect all paper path rollers, looking for wear, cracks or glazing. Replace worn rollers.
Image skew Paper size adjustment levers are not in correct position Verify position of paper size adjustment levers, and correct
Image skew Paper is loaded incorrectly. If paper is not installed flush and tight in the paper tray, a skewing problem will result. Remove paper from the tray, and install paper correctly. Position the paper guide correctly for the paper size being used
Image skew Failing registration assembly Replace registration assembly
Light print, dark print or fade
Problem Possible Cause Solution
Light print, dark print or fade PickupToner cartridge is low or failing Replace the toner cartridge
Light print, dark print or fade Transfer roller was not installed correctly, or is defective Reinstall transfer roller, making sure it is fully seated. Replace transfer roller if necessary.
Light print, dark print or fade Dirty laser scanner, or defective laser scanner Clean laser scanner mirrors. Replace laser scanner if necessary.
Light print, dark print or fade Poor contact from toner cartridge to engine controller board, or failing engine controller board, or failing high voltage power supply 1. Ensure that the drum ground spring is connected to the engine controller board correctly.
2. Clean the contacts if they are contaminated. If the problem remains after cleaning, or parts are damaged or deformed, replace them.
3. Replace the engine controller board.
4. Replace the high voltage power supply.
Light print, dark print or fade Wrong toner density setting, or EconoMode setting From the Print Quality menu, adjust the toner density setting. Make sure EconoMode is off.
Loose toner
Problem Possible Cause Solution
Loose toner Defective , failing fuser Replace the fuser
Loose toner Toner cartridge is defective Replace the toner cartridge
Loose toner Wrong fuser setting for paper type Paper type settings control the heat of the fuser and bonding of the toner. From the paper-handling menu on the control panel, change the fuser mode setting or choose a different paper type from the printer driver
Loose toner Toner spill contamination inside the printer Print a few more pages to see if the problem corrects itself. Clean the inside of the printer or use the printer's cleaning page
Loose toner Paper type might be unusable (too thick, too smooth, etc) Try an alternate paper type
Misshapen characters
Problem Possible Cause Solution
Misshapen characters Defective , failing fuser assembly Replace the fuser
Misshapen characters Laser scanner assembly is defective Replace the laser scanner assembly
Misshapen characters Failing drive gears causing fuser rollers to "slip" when bonding Listen for excessive drive gear noise; examine drive gears for wear. Replace if necessary.
Misshapen characters Failing transfer roller Clean or replace transfer roller
Misshapen characters Paper surface is too smooth for proper toner adhesion Try an alternate paper type with different surface
Misshapen characters Paper surface is too rough; toner migrates to low spots and leaves higher areas void Try an alternate paper type with different surface
Partial Blank Page
Problem Possible Cause Solution
Partial blank page Toner cartridge is failing Replace the toner cartridge
Partial blank page Unseated transfer roller Check transfer roller to ensure proper installation
Partial blank page Dirty laser scanner, or defective laser scanner Clean laser scanner mirrors. Checker shutters for correct operation. Replace laser scanner if necessary.
Partial blank page Failing engine controller board, failing high voltage power supply 1. Ensure that the drum ground spring is connected to the engine controller board correctly.
2. Clean the contacts if they are contaminated. If the problem remains after cleaning, or parts are damaged or deformed, replace them.
3. Replace the engine controller board.
4. Replace the high voltage power supply.
Partial blank page Page is too complex or not enough memory Memory overflow error should occur, or "page too complex" error. Try an alternate print driver. Add printer memory if necessary.
Repetative Defects
Problem Possible Cause Solution
Repetitive defects Defective toner cartridge Perform a half-way test. Replace the toner cartridge if necessary.
Repetitive defects Defective fuser Perform a half-way test. Replace the fuser if necessary.
Repetitive defects There are a variety of causes for repetitive defects. Check the repetitive defects ruler See repetitive defect ruler.
Partial blank page Page is too complex or not enough memory Memory overflow error should occur, or "page too complex" error. Try an alternate print driver. Add printer memory if necessary.
Skew
Problem Possible Cause Solution
Skew Print media is not loaded correctly, or trays are not adjusted properly. 1. Make sure paper is loaded straight/neatly/correctly.
2. Make sure paper tray is not filled past capacity.
3. Ensure the paper guides in the tray fit properly against the paper.
Skew Paper pickup / feed rollers are worn and feeding paper at a skewed angle Check pickup / feed rollers for wear. If possible, print from a different tray / paper path to verify that only rollers in that path are failing. Replace worn rollers
Skew Registration assembly is failing Replace registration assembly if necessary
Skew Object blocking paper path Check the paper path for obstruction
Skew Laser scanner assembly is failing Replace laser scanner assembly if necessary
Tire tracks
Problem Possible Cause Solution
Toner smear Failing toner cartridge Replace toner cartridge
Toner smear Contamination on paper pickup / feed rollers Clean or replace rollers.
Toner smear
Problem Possible Cause Solution
Toner smear Failing toner cartridge Do halfway test to isolate the problem. Replace toner cartridge
Toner smear Fuser assembly has toner buildup or is failing. Do halfway test to isolate the problem. Run some more pages to try to clear the toner buildup. If needed, replace fuser
Toner smear Toner spill contamination in the printer 1. Print a few pages to see if the problem corrects itself.
2. Clean the inside of the printer or use the printer's cleaning page
Toner smear Wrong fuser setting for paper type From the paper-handling menu on the Control Panel, change the fuser mode setting or choose another paper type from the printer driver.
Toner smear Defective DC controller. (DC controller regulates fuser temperature). If a replacement fuser doesn't solve the problem, replace DC controller PCA.
Toner smear Paper type may be unusable (too smooth, too thick, too rough) Try a different paper type
Toner specks
Problem Possible Cause Solution
Toner specks Failing toner cartridge Replace toner cartridge
Toner specks Toner spill contamination in the printer 1. Print a few pages to see if the problem corrects itself.
2. Clean the inside of the printer or use the printer's cleaning page
Toner specks Fuser assembly has toner buildup, or is failing. Do halfway test to isolate the problem. Run some more pages to try to clear the toner buildup. If needed, replace fuser
Vertical black lines
Problem Possible Cause Solution
Vertical black lines Defective toner cartridge Very common -- Install another toner cartridge or perform a halfway test to isolate the problem. Replace toner cartridge if necessary.
Vertical black lines Worn , failing fuser film Somewhat common -- Perform a halfway test to isolate the problem. Check fuser film for tearing or wear. Replace the fuser if necessary.
Vertical black lines Defective formatter generating a "video line" Less common -- Replace formatter if necessary
Vertical black lines Faulty DC controller or high voltage power supply Less common -- Replace DC controller , high voltage if necessary
Vertical dots
Problem Possible Cause Solution
Vertical dots Defective toner cartridge Replace toner cartridge
Vertical dots Defective engine controller board Replace engine controller board
Vertical dots Deformed or deteriorated transfer roller Replace the transfer roller
Vertical dots Faulty DC controller or high voltage power supply Replace DC controller , high voltage if necessary
Vertical white lines
Problem Possible Cause Solution
Vertical white lines Failing toner cartridge Very common -- Try gently shaking the cartridge to redistribute the toner. If the problem continues, replace the toner cartridge.
Vertical white lines Contamination in the laser path Somewhat common --
1. Clean the laser scanner mirrors and lens.
2. Replace the laser / scanner assembly.
White spots on black
Problem Possible Cause Solution
Vertical white spots Defective high voltage power supply (HVPS) or fuser. 1. Print a few more pages to see if the problem corrects itself.
2. Make sure that print media type and quality meet HP specifications.
3. Make sure that the environmental specifications for the printer are being met.
4. Replace the toner cartridge, HVPS, or fuser.
White stripes parallel to path
Problem Possible Cause Solution
White stripes parallel to path Failing toner cartridge Replace the toner cartridge
White stripes parallel to path Failing transfer roller Replace the transfer roller