Black line on left side of paper

The following steps will help to fix this issue:

1. Get a lint free cloth, rubber gloves (so toner doesn't get on your hands), some isopropyl alcohol, and a soft paint brush and gently clean any rubber rollers you can easily reach.
2. With a vacuum hoover out any loose toner particles.
3. With a lint free cloth very gently wipe the transfer belt (not all printers have one).
4. If all else fails, you may need to replace the transfer rollers / transfer belt.

Warning: make sure you wear gloves and don't touch the transfer belt film with your fingers or the hoover, you could leave a mark that will cause additional print problems.

1. Lift the document cover to expose the platen glass.
   
   
2. Wipe the platen glass (A), white areas (B), and transparent sheet (C) with a clean, soft, lint-free cloth moistened with water. The MP700 has one even platen glass and does not have an area like the one referenced in area (C).
   
   
   
3. Then wipe with a clean, soft, dry, lint-free cloth making sure there are no residues left, especially on the platen glass.
   
   
4. Close the document cover and make a copy of a text document to confirm the black line has disappeared.

Paper Tray Rollers Step 1 Turn off and unplug your HP printer. Pull out your printer's paper tray and locate the printer rollers on the paper tray. Each roller is gray or black, and they are made of rubber. Remove the rollers from the tray.
On HP inkjet printers, the printer roller is not on the paper tray; it is on the area inside of the printer where the paper tray slides into the unit. Remove the paper tray and sit your HP inkjet printer upright, so the paper tray area is facing upward, and then look for the printer roller.
Step 2
Pour 1 tbsp. of isopropyl alcohol or clean water onto a lint-free cloth and scrub the paper or internal tray rollers with the cloth. Fold the cloth in half and repeat the cleaning process until the rollers are free of dust and debris.

Step 3
Wipe the rollers with a dry, lint-free cloth to remove any remaining dust or debris. Let the rollers dry completely before sliding the paper tray back into your printer.
Internal Pickup Roller - Laser Printers Only Step 1 Turn off and unplug your HP printer. Open your printer's front door and pull the printer's toner cartridge toward you to remove it from the printer.
Step 2
Locate your printer's internal pickup roller. The roller is gray or black, and it is made of rubber. Lift the roller upward, towards the front of your printer. Pull the roller gently out of the printer and lay it on a clean surface, such as a desk or workbench.
Step 3
Pour 1 tbsp. of isopropyl alcohol or clean water onto a lint-free cloth and scrub the pickup roller with the cloth. Fold the cloth in half and repeat the cleaning process until the roller is free of dust and debris.
Step 4
Wipe the roller with a dry, lint-free cloth to remove any remaining dust or debris. Let the roller dry completely before snapping the pickup roller back into place inside of your HP printer. Reinstall the toner cartridge and close your printer's door.

Hi George,
Sounds like you are on the right track.
The spots on the paper you describe on the back of the paper appear to be toner, and because they are on the back of the paper and you can rub them off, appears to be after the fuser.
To clean the printer, a vacuum cleaner will do a partial clean. You need to clean all the paper feed rollers.
Start by wiping the inside of the printer area with a soft, lint-free cloth to remove any dust, paper particles or spilled toner.
Then use a damp soft, lint-free cloth with clean water. Hold the cloth against each roller while rotating the roller. Keep cleaning the cloth. Do this for each roller inside the printer.


Read more: http://www.ehow.com/how_6913741_clean-roller-blades-samsung-clp_300.html#ixzz2sGMAltnZ

Perhaps did not specify paper thickness (check control panel and print driver).
Toner getting low.
Clean registration roller with clean damp cloth.

Introduction Your printer requires minimum routine maintenance. This chapter explains the following tasks

• Cleaning the printer
• The toner cartridge
• Extending toner cartridge life
• Clearing a TONER LOW message
• Replacing printer parts

Cleaning the printer To maintain print quality, thoroughly clean your printer:

• Every time you change the toner cartridge
• After printing approximately 6,000 pages
• Whenever print quality problems occur

Clean the outside of the printer with a lightly water-dampened cloth. Clean the inside with only a dry,lint-free cloth. Observe the warnings and cautions that follow the cleaning tasks on the following pages. Caution To avoid permanent damage to the toner cartridge, do not use ammonia-based cleaners on or around your printer.
Printer Cleaning Tasks Before you begin these steps, turn the printer OFF and unplug the power cord. Caution Do not touch the transfer roller (black sponge-rubber roller) with your fingers. Skin oils on the roller can cause print quality problems.
If toner gets on your clothes, wipe it off with a dry cloth and wash your clothes in cold water. Hot water sets toner into fabric.
Warning Avoid touching the adjacent fusing area. It may be HOT

1. OPen the printer's top cover and remove the toner cartridge
2. with a dry lint-free cloth, wipe any residue off the Paper Access Cover (it has a green handle) and the adjacent silver metal strip.
3. Wipe any dust or dirt off the black plastic Paper Feed Guide with a dry, lint-free cloth.

The Toner Cartridge see the printed book pending update of this page Extending Toner Cartridge Life see the printed book pending update of this page Clearing the TONER LOW Message see the printed book pending update of this page User-Replaceable Parts Some worn parts can be replaced by the owner. See Chapter 8, "Solving Printer Problems", for descriptions of the difficulties that can indicate when to replace a part. Warning Switch OFF and unplug the printer before replacing parts. Failure to do so may result in personal injury or damage to the printer. After switching the printer OFF and unplugging the power cord, allow the printer to cool for 30 minutes before replacing the parts.
Unless specifically noted, replacement is the reverse of removal. Always carefully observe the position and alignment of the part you are removing; this is your best guide to replacement. User Replaceable Parts Part Name Part Number Remarks Multi-Purpose (MP) Tray Pickup Roller RB1-2127-000CN Replace both the MP Tray Pickup Roller and the MP Separation Pad at the same time. Multi-Purpose (MP) Tray Separation Pad RF5-0343-000CN Replace both the MP Tray Pickup Roller and the MP Separation Pad at the same time. Paper Cassette Pickup Roller RB1-2204-000CN See Chapter 8 for replacement conditions. Transfer Roller RF5-0349-000CN See Chapter 8 for replacement conditions. Fusing Assembly RG5-0880-000CN 220-240 Volts Cleaning Brush RB1-2260-000CN n/a Optional LC Pickup Roller RB1-2650-000CN See Chapter 8 for replacement conditions. Ordering Information User replaceable parts are available from the authorized HP dealer or from Hewlett-Packard. To order parts, see this information Multi-Purpose (MP) Tray Paper Pickup Roller and Separation Pad Before you begin these steps, turn the printer OFF and unplug th power cord.

1. Open the Multi-Purpose (MP) Tray.
2. Grasp the black plastic Envelope Feed Access Cover as shown, and pull it downward and toward you to remove it.
3. Read all of this step before proceeding. Remove the pickup roller by pushing down on the plastic retaining clip with your right index finger (see inset A) while sliding the roller to the right with your left index finger. When the roller is partway to th right, push in on the small plastic tab (see inset B) behind the right end of the roller and fully remove it.
4. Insert a flat-blade screwdriver into th indentation at the front of the separation pad and twist the screwdriver blade gently to loosen the pad see (inset). When loose, gently lift pad from its seat.
5. To install a new separation pad, place it over the opening and press it down firmly with your forefinger to seat it. Be sure the metal edge is toward the front of the printer. To install a new Multi-Purpose (MP) Tray Paper Pickup Roller, slide it over the shaft, then rotate it so that the flat side of the new roller is aligned with the flat side of the shaft. Then slide th roller to the left until it clicks into place.
   
6. Reinstall the black plastic Envelope Feeder Access Cover and discard the used roller and pad.

Paper Cassette Pickup Roller Before you begin these steps, turn the printer OFF and unplug th power cord.

1. Remove the toner cartridge.
2. Remove the Paper Cassette.
3. place the printer on its left side so that the bottom of the printer is easily accessible.
4. Remove the pickup roller by pinching the release clip and sliding the roller off the shaft (the new roller will be installed in the reverse order). Slip the new roller over the shaft and rotate it until properly aligned. Slide the roller along the shaft until it clicks into place.
5. Place the printer upright, then place the toner cartridge, Paper Cassette, and power cord. Switch the printer ON.

Transfer Roller see the printed book pending update of this page Fusing Assembly see the printed book pending update of this page Lower Cassette Pickup Roller Not applicable to HP printers at ING

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Instructions Things You'll Need:

• Small bowl
• Water
• Lint-free cloth
• Tweezers
• printer paper kit

1. Turn off the Kodak Printer Dock, if it is on.
   
2. Pull the paper tray from the printer.
   
3. Check the exposed paper slot for paper fragments and/or jammed sheets of paper in the slot. Use tweezers to remove any paper fragments from the paper slot.
   
4. Fill a small bowl with one-half cup of cold water. Wear latex gloves to keep your hands from getting wet.
   
5. Dip a lint-free cloth in the bowl of water. Wring out excess water.
   
6. Wipe the paper-feed rollers located in the paper sloth with the damp cloth. Turn the rollers with the cloth to remove any caked-on debris from the rollers.
   
7. Turn the cloth to a clean side. Continue cleaning the rollers until the debris is gone.
   
8. Let the paper-feed rollers air dry.
   
9. Remove the paper from the paper tray. Fan the paper to keep the sheets from sticking together.
   
10. Reload the paper tray with additional paper from a printer paper kit. Place the new paper below any older paper in the paper tray. Do not load more than 30 sheets of paper.
    
11. Reinstall the paper tray. Print a test picture to check the Printer Dock.
    

If a print result of faxing, copying or scanning has uneven print density, or when copies and scans you make have vertical black lines, cleaning the platen glass may solve the problem.

1. Turn off the power and disconnect the power cord.
   
   
2. Prepare two clean, soft, and lint-free cloths.
   
   Note:
   Do not use tissue paper or paper towels as they may damage the machine.
   
   
3. Open the document cover.
   
   
4. Wipe the platen glass (D), the inner side of the document cover (white area) (C), the glass of the ADF (A), and the inner side of the ADF (white area) (B) with a clean, soft, lint-free cloth moistened with water
   
   
   
   (A) ADF Glass
   (B) ADF White Reference Area
   (C) Document Cover White Reference Area
   (D) Platen Glass
   
   Note: If you have trouble wiping dirt, use diluted mild detergent (for dish washing).
   Caution:
   * Never use volatile liquids such as thinners, benzene, or alcohol; these can damage the machine.
   * The document cover white reference is easily damaged, so wipe it gently.
   
5. Carefully wipe away moisture from each part with another soft, dry lint-free cloth. Do not leave any residue, especially on the platen glass.
   
   
6. Close the document cover.
   
   
7. Reconnect the power cord and power the machine back on.

Print cartridge

When the print cartridge contacts are dirty and the printer cannot detect/communicate with print cartridge.

Clean the contact points on the cartridges with a dry, lint-free cloth.

1. Open the top cover of the printer.

2. Remove the print cartridges.

3. Clean the copper-colored contact points on the cartridges with a damp, lint-free cloth.
Use a dry, lint-free cloth to remove moisture from the contacts.

5. Insert the cartridges back into the printer.

6. Close the top cover.

7. Try printing again.

If you still cant communicate try with new cartridge .

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CF

To solve the printing problem..


# Hold the cartridge upside down, with the bar-code label facing you and take a damp paper towel.
# Use the towel to wipe the printhead of the cartridge on the bottom (where the ink comes out). Wipe the printhead horizontally in one direction only (left to right).
# Continue doing this until it looks clean.
# Then dab the cartridge on the towel to make sure the ink is flowing.
# Next, look inside the printer and locate the carrier that holds ink cartridges. Caution: Make sure the cartridges are not installed at this point.

1. Look for a shiny piece of metal underneath the contacts at the back of the carrier.
2. Take a damp cotton swab (use water only!) and wipe along the bottom of the shiny metal piece. Note: You may need more than one swab.

# Reinstall the cartridges, making sure you snap them correctly into the printer.


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There are 3 things to be checked. 1: toner cartridge,try replacing it with a new on. 2: Transfer roller w/c underneath the toner cartridgelying on the printer. Removed toner cartridge,you see a roller w/c is foam like outlook,wipe it with clean dry lint free cloth or paper towel. 3: Fuser unit w/c fuse the ink on the paper.It is lacoted at the back of the machine.Remove the bottom rear cover,just by pulling it. Then you will see 2 blue color lever on left & right,turn those levers up to unlock the fuser unit,then pull out the unit. taking a look in the inner part of the unit you will see rollers . Any bad coating or damage on the roller will create smears on the prints.