HP 2550n laser - black toner on imaging drum. All toner cartridges and imaging drum are HP. Tried cleaning off but continually reappears. Imaging drum reasonably new - 3 mos old or so. Usually imaging drum lasts 18 mos. Never had one "leak" like this. Renders printer unusable.Do I have to cough up the hefty price for a new drum?
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is the toner cartridge original or reffiled.
Try with original one.
check if the image you print is correct printed on drum
to do this print something and when the printer start to pull the paper stop the printer by open a door. then pull out the toner cartridge and look the drum if the image seems ok If you see bad image you have problem with laser scanner or charge of drum.
In cases of print quality issues you should always start with the imaging drum. In this case the toner cartridge. Make sure it is not a re-manufactured or refurbished toner cartridge. A lot of times when someone refurbishes the cartridge they don't replace the imaging drum (the blueish green drum under the shutter). Check for toner stuck or burned on the drum. If there is you need to replace the toner cartridge
If there is no toner stuck or burned on the imaging drum then you more than likely you will need to check or replace the Fuser in the back of the machine. The back door of the machine comes out easily enough and the fuser clips into place. **Be careful it doing to be hot.** Remove the fuser and check the rollers inside for burned toner or damage. If so replace the fuser .
You can purchase a Fuser Kit from HP or find a refurbished fuser from Depot America or OrionMarket.com for a lot less.
There is a locking mechanism that actuates when the front door is opened. This is a safety device, and should only be tampered with if you know what you are doing. Also, make sure you unplug the mains power before proceeding. Having given you air warning, proceed at your own risk...
If you look up near the RHS door hinge there is a slot for the safety interlock. Use a small screwdriver to push the locking lever toward the rear of the device. The Carousel should now rotate by hand There is a fairly common fault with this model involving this mechanism. It may need the lock and associated mechanism replaced
HP 4550 Color Laserjet Printer - Blank or white pages :
01. Your software application is sending an extra page-eject command.
02. Check the software’s printing configuration information. There is a problem with the network configuration.
03. Some sharing devices on networks may generate a blank page as a separator.
04. Check with the network administrator.
05. The printer may be feeding two or more pages at once because the paper is difficult to separate.
06. The sealing tape has been left in the toner cartridge.
07. The toner cartridge is empty or defective.
08. The laser scanner door does not open properly.
09. Remove and reseat the toner cartridge.
10. Check the laser scanner shutter door for proper operation.
11. The toner cartridge guide is damaged,
improperly positioned, or missing.
12. There is no transfer roller voltage.
13. Perform the Half Self-Test Functional Check to check all other electrophotographic processes.
14. Replace the transfer roller if necessary.
15. The high-voltage connectors are mounted on the high-voltage power supply (HVPS) PCA and protrude into the toner cartridge cavity.
16. Check the springs for functionality. Clean if dirty; replace if defective or missing. The HVPS PCA is defective.
17.The DC controller PCA is defecti There is no drum ground path.
18 Check the drum ground.
19. The laser scanner cable assembly is defective
20 The page length and margins are not set correctly for the paper size. Verify that the ribbon connector at J1307 of the HVPS is properly seated.
21. If the HVPS has been removed recently, verify that the ribbon connector from the DC controller PCA to the HVPS is properly seated at both ends..
22. Verify that the photoconductive drum is rotating properly. Perform is the drum diagnostic test to visually observe if the drum is rotating.
23. OR using a felt-tipped marker place an index mark on the edge of the drum outside the image area. Turn on the printer (wait for drum rotation to occur), and then look to see if the drum has 24. moved. If the drum has not moved, investigate the mechanical and electrical drum rotation circuitry and movement mechanisms.
25. The imaging drum shutter may not be retracting. Replace the imaging drum.
26. Lst but not the least, please fry to have the Printer int the Setcie
Vertical lines or streaks
Check for a leak where light might be entering the printer.
Check for circumferential scars on the photosensitive drum. If scars are present, replace the
drum cartridge if the line goes through all colors.
Check for circumferential scars on the upper fusing roller. If scars are present, replace the upper
fusing roller if the line goes through all colors.
Remove the imaging drum and inspect main charger or imaging drum for a contaminant, such as
a fiber, if the line goes through all colors.
CAUTION Do not expose the imaging drum to light for more than 15 seconds. The drum is light sensitive, and
exposure to light can cause permanent damage.
Vertical black lines
The toner cartridge is defective.
The toner cartridge is not seated properly.
The fuser entrance is dirty.
The fuser has scratches on it.
This might be a repetitive defect. If so, the lines will repeat at a consistent interval down the page.
The printer needs to be cleaned.
There is a problem in the heating element.
Vertical white lines
If white lines or streaks appear only in the black areas of the printed media, print several
configuration pages to clear the anomaly. If this does not clear the problem, check the sleeve
surface to confirm the defect, then replace the black toner cartridge.
If white lines appear only in a particular color, try printing several configuration pages to clear the
error. If the error does not clear, check the sleeve surface to confirm the defect, then replace the
defective toner cartridge.
There is a lack of toner or the toner cartridge is faulty.
There is dirt in the laser path.
The fuser is defective.
A mirror in the laser scanner is dirty.
Press the Go and Rotate Carousel buttons simultaneously. This will calibrate the printer. See if this works.
Otherwise....Remove all cartridges and drum. Switch off printer. Close the lid. Switch on printer and wait until any churning stops. Insert the drum and close the lid. Wait until any churning stops. Put in one cartridge at a time, closing the lid and wait till it stops churning each time. With the last cartridge put in, it will churning longer (calibrating). Try to print from your computer.
It could also be that the toner could actually have run out for the other colors.
Check the black toner cartridge. Most printers that use multiple cartridges will use the black cartridge as long as it has toner in it but will then start using the color toner to do the black/grayscale when the black cartridge is empty.