Question about HP Color LaserJet 2600n Printer

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Has printed many reams of paper - now loosing the red information on pictures. Have replaced the transfer assembly on the front pannel but this did not correct the loss of reds. Thanks and God Bless

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Problem with the scaner clean & refix the scaner unit with blower after removing the tooner ur problem will be resolve if problem remain same then call the hp engr for cleanng the scaner unit ur problem will be resolve ................

Posted on Jul 14, 2010

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How i replace ETB for hp cp4025


Replacing the Transfer Belt (ITB, Transfer Kit) HP Color LaserJet CP4525 CM4530
1. Open the printer's right side door.
2. Use the blue lever (see callout 1 in picture below) to lower the secondary transfer assembly.
3. Grasp the small handles on the transfer belt assembly (circled in blue in picture below), and begin gently pulling the assembly out towards you, until a set of 2 larger handles pop free on the sides of the transfer belt assembly.
4. Now grasp the larger handles on the transfer belt assembly, and continue pulling the transfer belt straight out of the printer until it is completely removed.
5. Avoid touching the surface of the new transfer belt. Install in reverse order, sliding it securely into the machine.
6. After replacing the Transfer Belt, it's a good idea to perform a Full Calibration (or even several Full Calibrations in a row, if you are having print quality issues). Full Calibrations help with print quality by aligning the color tones, the drums, and the color plane. Each Full Calibration takes about 4 minutes. To perform a Full Calibration: Press MENU to enter the menus. Press Down Arrow to highlight CONFIGURE DEVICE. Press Checkmark to select CONFIGURE DEVICE. Press Down Arrow to highlight PRINT QUALITY. Press Checkmark to select PRINT QUALITY. Press Down Arrow to highlight FULL CALIBRATE NOW. Press Checkmark to select FULL CALIBRATE NOW. Wait for the printer to calibrate (usually takes 4 minutes or so), and then print a test page. If print quality still needs improvement, repeat the Calibration. If multiple Calibrations don't help, some of the toner cartridges may need replacement.

5e5fcf65-5757-40c3-a110-1a2864982d2e.jpg 554a3a0e-c038-46ec-983d-7467c3deeccf.jpg 7883eb6b-6a29-43fd-b69a-0ff825f60373.jpg bb2de9b0-8f0f-4f6a-a69f-ed1001f8bd09.jpg

Jul 15, 2014 | HP Laserjet Cp2025n Printer

Tip

Troubleshooting common laserjet printers problems


In order to understand and troubleshoot a Laserjet printer, I think it is important to understand how the printer functions. Laser printers for the most part contain some standard assemblies: Toner cartridge, Laser Scanning Assembly, High Voltage Power Supply, DC Power Supply, Paper Transport Assembly, Transfer Corona Assembly, Fusing Assembly, Printer Controller Circuitry, and Ozone Filter.
A laser printer undergoes a six step process that helps form images on paper. The six major steps are:

1. CLEANING- This is the first step in the process in which a rubber blade inside the printer cartridge scrapes any toner left on the drum into a used toner receptacle inside the cartridge. A fluorescent lamp discharges any remaining charge on the photosensitive drum (the photosensitive drum or EP drum loses its charge when exposed to light).

2. CHARGING- A special wire called the charging corona within the toner cartridge located above the photosensitive drum receives a high voltage from the High Voltage Power Supply. This high voltage is used to apply a strong , uniform negative charge to the surface of the drum.

3. WRITING- The laser is turned on and scans the drum from side to side, flashing on and off according to the bits of information the printer controller sends as it communicates the individual bits of the image. Where ever the laser touches, the photosensitive drum's charge is reduced to a slight negative charge. As the drum rotates, a pattern of the exposed areas is formed, representing the images to be printed.

4. DEVELOPING- Now the surface of the drum holds and electrical representation of the image being printed. Toner can now be transferred to the areas that were exposed in the writing step. A metallic roller called the developing roller inside the cartridge now acquires a charge from the HVPS. The toner sticks to this roller because there is a magnet located inside the roller and because of the electrostatic charges between the toner and the developing roller. The developing roller rotates toward the EP drum, the toner comes between the the developing roller and EP drum and is attracted to the areas that have been exposed by the laser and the toner is repelled by the areas that were not exposed to the laser. The EP drum continues to rotate until the developed image is ready to be transferred to paper.

5. TRANSFERRING- The developed image into position. The controller notifies the registration rollers that the paper should be fed through. The rollers move the paper underneath the EP drum, and the transfer process can begin. The controller sends a signal to the corona wire or corona roller (depending on which the printer has) and tells it to turn on. The corona wire/roller then acquires a strong positive charge from the HVPS and applies it to the paper. Now that the paper is charged, it pulls the toner from the EP drum and the line of contact between the roller and the paper. Once the rollers move the paper past the corona wire, the static-eliminator strip removes all charge from that line of paper.

6. FUSING- This is the final step in the process where the toner image is made permanent. The roller push the paper toward the fuser rollers. The fuser rollers grab the paper and is now in control of the paper. As the paper passes through the fuser, the 180 degree fuser roller melts the resin of the toner, and the rubberized pressure roller presses it permanently into the paper. The paper continues on through the fuser and then exits the printer.

The following picture will give you a general idea of the process and components.

6e8ecec.gif


TROUBLESHOOTING:

PAPER JAMS- These are by far the most common problem encountered by all printers at one point or another. Some common causes of paper jams are as follows:

1. The paper is wrinkled or has upturned edges, the wrong type of paper is used, the paper is not place properly in the feed tray (usually not even).

2. If paper jams start happening at a frequent rate then the problem could be a worn roller (which can be replaced and are not that expensive). The following pictures shows the rollers.

9016659.jpg

6a2eae9.jpg

3. Anther cause could be related to the drive gear of the pickup roller, shown here:
381b1a8.jpg


BLANK PAGES:

If your printer is printing nothing but blank pages, then the toner is not being put on the paper. There are three major causes for this happening.

1. The toner cartridge could be empty or if you have just bought a new cartridge it is possible that you purchased a defective one. If you forget to remove the sealing tape the toner will not be able to be accessed properly by the printer.

2. The Corona Assembly could have a malfunction such as a missing or damaged corona wire. If this is the case the developed image will not transfer from the EP drum to the paper. The following is a picture of Corona Assembly:
423433f.gif

3. Another cause is the High Voltage Power Supply. If the power supply does not charge the components with the proper voltages. Picture of an HVPS:
451fd29.jpg

REPETITIVE SMALL MARKS OR DEFECTS:

This usually happens with heavily used or older laser printers. The following could be causing the problem.

1. Toner may have been spilled inside the printer.

2. A chip or crack in the EP drum can be another cause which can cause a toner build up and can get stuck on one of the rollers. EP drum picture:
f036288.jpg

VERTICAL BLACK LINES ON THE PAGE:

This can be caused by the following:

1. A groove or scratch in the EP drum.

2. A dirty Corona Wire which prevents a sufficient charge from being placed on the EP drum.

VERTICAL WHITE LINES ON THE PAGE:

The number one cause is the following:

1. This usually happens when proper cleaning and maintenance is not performed on the printer. Foreign matter gets caught on the transfer Corona Wire.

IMAGE SMUDGING:

This happens when you pick up a paper that has just come out of the printer and when you touch the ink, it smudges or smears.

1. The fuser could be malfunctioning or need replacement due to a burnt out halogen light inside the heating roller.
87c0647.jpg

2. Dents or cold spots in the fuser heat roller can also cause the problem.

GHOSTING:

Ghosting is what you have when you can see light images of previously printed pages on the current page. Usually one of two things cause this problem.

1. Bad erasure lamps. This causes the previous electrostatic discharges to not be completely wiped away.

2. A broken cleaning blade. This causes old toner to build up on the EP drum and presents itself in the next printed image.

PRINTER PRINTS PAGES OF GARBAGE:

This happens when the print on the paper comes out like garbage and is not understandable or looks like some government secret code on the page. The following are usually the causes.

1. The printer driver software is not the proper driver for the printer or it is not configured for the correct page-description language (PCL or PostScript).

2. A bad formatter board. Remember the formatter board receives information from the computer and turns it into commands for the various components in the printer.

44a98cc.jpg


The following are some extra pictures to gain a better idea of some of the terminology used in this tip and get a better view of its components.
8c70d6a.jpg


Close up of Laser Assembly and mirrors:
96cb825.jpg


Laser diagram on how the process works:
84c37fe.gif

Fuser Gear:
c0f407d.jpg

Separation pad where pickup roller attached:
de7421c.jpg

Common Fuser Parts:
e7902b2.jpg

HP LASERJET ERROR MESSAGES:

00 Ready--The printer is in standby mode and ready to print.
02 Warming Up--The fuser is being warmed up before the 00 ready state.
05 Self Test--Full self test has been initiated from front panel.
11 Paper Out--The paper tray sensor is reporting no paper in tray.
13 Paper Jam--A piece of paper is caught in the paper path. Open the cover and remove any jammed paper and close the cover.
14 No EP Cart--No EP cartridge (toner cartridge) installed in the printer.
15 Engine Test--An engine self test is in progress.
16 Toner Low--The toner cartridge is low. Replace the toner soon.
50 Service--A fuser error has occurred. Commonly caused by a fuser lamp failure.
51 Error--Laser scanning assembly problem.
52 Error--Scanner motor in laser has malfunctioned.
55 Error--Communication problem between formatter and DC controller.

on Mar 16, 2010 | Office Equipment & Supplies

1 Answer

Hp 5550 patchy print


Most of the cases fuser assembly or supplies are causes of ghost image. If image is not properly transferring on media causes transfer roller or ETB.
Do this small exercise: Give print command, wait till paper grabs, once paper entered in cartridge area, power it off, open top & front cover, remove paper and see the print quality.Observed any ghost image what you observed? No ghost image? then problem with fuser assembly..

1.Remove fuser assembly, check any toner particles deposited on surface of fuser transfer roller or heater roller.. if found clean carefully with good cotton cloth while fuser having certain temperature,pl avoid metal & sharp objects to clean..
2. Clean paper path roller(You can observe the rollers to push the paper to reach the destination)
I hope this exercise will resolves the issue..

Jul 26, 2012 | HP Color LaserJet 5550hdn Printer

1 Answer

Di550 light printing


Directly below the drum section is assemble called the transfer/separation assy. the purpose of this unit is twofold. (It houses to very thin gold plated wires) One wire is what helps the transfer of the image from the drum to the paper. Since the paper goes between this wire and the drum, the second wire prevent the paper from sticking to the drum during the transfer process. use a eraser end gentle I mean gentle clean them. release front lever then push down and pull out transfer/separation assy. remove the guides clean wires, again be gentle, has the drum been replaced, does this happen with printing or copying if only copying clean the mirrors below the big glass, be gentle can use Windex, use of paper towel don't leave any little paper particles

Jun 24, 2012 | Minolta Di550 B&W Laser Printer

1 Answer

Cannot remove the paper jam


To clear the message Paper Jam from the display, follow the steps listed below:

NOTE: images shown below are from a representative product and may differ from your Brother machine.


STEP A. Check for and remove any jammed paper or foreign objects in the machine

  1. Unplug the Brother machine from the power outlet.


    Caution Before you unplug the machine from the power source, you can transfer your faxes that are stored in the memory to your PC or another fax machine so you will not lose any important messages. Refer to the Related FAQs in the end of the page for information. (only for applicable models)

  2. Lift the scanner cover using the plastic tabs or finger holds, located on the left and right side of the machine until it locks securely into the open position.


    jam_coveropen.gif

    Caution DO NOT touch the encoder strip. The encoder strip is a clear plastic strip in front of the white vinyl band (outlined in red as shown in the picture below). If the encoder gets markings or debris on its surface, it may cause other problems.

    20090511_02.gif






  3. Verify the location of the print head. The print head is a black square object, located behind the encoder strip. The print head moves from left to right.




  4. Move the print head to the middle using your fingers.


    Caution DO NOT touch the encoder strip (marked in red shown below).
    20090511_04.gif

  5. Check for and remove any ripped paper or a foreign object in the left corners or underneath the print head.


    Hint The ripped paper may be very small. Using a flashlight will help you to find the ripped paper.

  6. Turn the machine around and open the Jam Clear Cover (1). Look inside the machine and remove any jammed paper.

    jam03.gif

  7. Close the Jam Clear Cover. Make sure the cover is closed properly.


    jam05.gif

  8. After removing all of the paper scraps, Close the scanner cover by lifting the scanner cover to release the lock. Gently push the green scanner cover support down and then close the cover.

  9. Remove the paper tray (1) from the machine.

    jam01.gif
  10. Place one of your hands under the LCD unit and into the opening of where the paper tray was.

  11. Using your hand, lift the front of the machine approximately 6 inches off the surface.

    jam_6inch.jpg

  12. Look inside the tray areas roof of the machine and a row of black rollers will be aligned across. See picture below.

    jam_exit_roller.jpg

  13. Look in-between each of the black exit rollers for a piece of stuck scrap paper. (A flash light may need to be used if you are having trouble locating the paper scrap).

    jam_paper_scrap_stuck.jpg

  14. Using a pair of tweezers, the paper scrap can be easily removed from the exit rollers.

  15. Place the machine gently down onto the surface.

    • If no paper scraps were found inside the machine, please check the paper in the tray. If the paper is slightly curled, the print head will catch the edge of the paper and tear it. To resolve the issue, the paper in the tray must be replaced and continue to STEP 16.

    • If paper scraps were found and removed from the machine, continue to STEP 16.


  16. Put the paper tray back into the machine.

    20090511_09.gif

  17. Plug the power cord back into the power outlet.

    • If the LCD displays the date and time, go to STEP D.

    • If LCD displays the message "Paper Jam" go to STEP B.


- If the print head is on the right side:

  1. Plug the power cord back into the power outlet and wait for the machine to stop making noises.


  2. Press the Stop/Exit key for approximately 5 seconds until the print head moves to the middle.


  3. Unplug the machine from the power outlet.


    Caution Make sure to unplug the machine. The print head may move and injure your hand. Before you unplug the machine, you can transfer your faxes that are stored in the memory to your PC or another fax machine so you will not lose any important messages. Refer to the Related FAQs in the end of the page for information. (only for applicable models)

  4. Examine the right side of the machine where the print head had been positioned and underneath the print head and remove any pieces of ripped paper or foreign objects.


    Tweezers may be used with caution to remove paper scraps or the foreign objects.


    Hint The ripped paper may be very small. Using a flashlight will help you to find the ripped paper.

  5. After confirm the paper scraps or the foreign objects in the right corners or underneath the print head, go to STEP 6.

Mar 10, 2011 | Brother MFC255CW All-in-One InkJet Printer

1 Answer

My samsung CLX2160N keeps printing with no ink on the pages and even though I print one page it just keeps spitting paper..also the green drum in the printer appears to be covered in black ink


If the toner is not empty and you notice that the toner assembly is dirty with print dust, then it probably is an issue of transfer corona failure. You will have to replace the entire printing mechanism. But before you go out and cash out over $200 for the new assembly it's best that you take the printer back to the shop where you purchased it. The print assembly warrants over 50.000 printouts, and if you haven't printed out so much it may still be under factory warranty.
If you haven't used the printer too much (never replaced toners, never printed out over 500 pages total) then there's an easy way to verify if the transfer corona is really the problem. Pull out the print assembly and check to see if the waste toner tank is full/overfilled. If it is brimm-full then you're definitely facing a bad transfer corona and you will have to replace the entire mechanism, or find a good repair technician that can fix the existing one.
Another possibility would be if there is some dust on the paper and you can see some of the print powder on the exit tray. If there is print dust on the exit tray that means that the fuser is not working. If the papers that are coming out of the printer are cold then this is deffinitely a fuser failure, and you're still stuck with either repairing the print assembly or cashing out for a new one.
About the problem with the printer spilling out paper all the time, see if you've set the printer to print A4/Letter size printouts or it's set to print infinite paper track (like those old paper formats we see on old 80's movies). Either way, the no print and the paper spitting are not related issues.

Jan 17, 2011 | Samsung CLX-2160N All-In-One Printer

2 Answers

The printer either works, or it doesn't. When it


it's sounds like something is getting loose as printer attempt to print, check all the door, are any of the door becomes loose as printer try to print ?
Vinay

Feb 08, 2010 | Samsung CLP 300 Laser Printer

2 Answers

Canon IR105 and IR8500 Load paper Problem, Tray Suspend Problem, Paper Pickup and Jam Problem


WOW !!!! that is a list, but I will try to shed some light.

1-are the trays not being sensed in the paperdeck (optional paper tray capacity)
and the ones that work in the copier?/ a) the bord may be bad b) the connector may not have good contact
2-tray suspend

3-registration jam, a) the registration assembly is probably shorting out b) notenough sep causing the paper to rise up on the drum and then jam,

4-the paper sensor in the trays are in the pick up assembly tires, the ones that come down topick up the paper, there is a sensor that is loose but when it hits paper goes up, when no paper the metal plate goes up but has a hole for the sensor to fall trough and does not go up, giving paper empty.

5-I do not have any info on the specs for the corona wires, this is in the service manual

6-Sparking in the coronas is bad and can result in paper jams and holes in the drum, sometimes putting whiteout on the very ends of the coronas help, but it's better to replace, you can get the end blocks seperate.

7-Pre-corona assy' is to charge up the drum for fater copies, some techs do take them out, if all the wires are arcing then it may be your HVT (high voltage transformer) for the coronas going bad.

8-image is skewed only when using ADF if you put it on the glass it should be fine, the problem is the glass is too dry, try spraying some WD40 on the glass and wiping it off, leaving no residue just a slick smooth surface. the paper turns due to the dryness when fed on the glass.

9- Yes you are right there is no room for the paper to skew it would tear or get jammed if it did

hope I was of some help

Oct 15, 2008 | Canon imageRUNNER 105 Copier

1 Answer

Transfer roller usage message on Phaser 7700. replaced..still wont print


I found the answer here: http://office.support.xerox.com/SRVS/cgi-bin/webcgi.cgi

Resetting Transfer Roller Life
  • Resetting the transfer roller life is to be performed only if the Transfer Roller Assembly was defective and or the assembly is replaced before an end of life or near end of life message. Not to extend the life of the assembly. Doing so may cause premature failure of other internal printer components.

  • The printer will prompt the user to reset the life counts if the assembly is replaced after receiving a Replace Transfer Roller or Replace Transfer Roller Soon message.
note_image33x30.gif    Note: If the main Menu does not appear on the front panel screen and only Replace Transfer Roller is displayed, there may be a print job that is either processing or currently printing. Try the following steps to clear the print jobs and reset the Transfer Roller life:
  1. Press the cancel button several times to flush processing jobs from the printer.

  2. If you do not receive access to the front panel menu by doing this, power off the printer and disconnect Ethernet, parallel or USB cable from the printer.

  3. Turn the printer back on, and while it is powering up, immediately start pushing the cancel key repeatedly until you receive access to the front panel menu.

  4. If the printer menu appears on the front panel screen, follow the instructions below to reset the Transfer Roller life if the printer did not prompt you to reset it:


  1. With Menus highlighted press OK.

  2. Press the Down Arrow and scroll to Supplies Info Menu.

  3. Press OK.

  4. Press the Down Arrow and scroll to Exit at the bottom of the menu tree.

  5. Now scroll up to Reset Transfer Roller Life.

  6. Press OK.

  7. Reset Transfer Roller NOW is displayed.

  8. Press OK to reset the transfer roller life.

Sep 30, 2008 | Xerox Phaser 7700 Laser Printer

1 Answer

Copier prints light like paper is damp


Damp paper is indeed you problem. The top sheets in the paper drawer will absorb moisture and that moisture will prevent the image from completely transferring from the drum. If you want to test the moisture hypothesis, just open a fresh ream of paper and you should see and immediate improvement. If not, then we need to look elsewhere. Let me know if it works. Aloha, Bill

Sep 05, 2007 | Sharp AR-5316 Advanced Digital Imager...

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