HP Color LaserJet 4550

How to Identify and Fix Common Problems ?

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If one or more toner cartridges are installed incorrectly, this may result in a 54.2 carousel rotation error. This error is typically accompanied by a loud grinding noise. NOTE: The carousel is the rotating part under the top cover to which all four print cartridges attach.
The 59. F0 has been a common error code on the HP CLJ M452 and M377 / M477 MFP models. The printers service manual references this error to a “drum motor assembly” but in most cases has been resolved by replacing the Transfer Belt assembly (RM2-6454).
This error is primarily caused by one of the following conditions: A transfer alienation failure in which the ITB is stuck and unable to properly engage the internal transfer rollers. The SR9 sensor (the primary transfer roller disengagement sensor) has gone bad. The fuser drive assembly has failed.
There are many factors that determine the actual drum life, such as the temperature, humidity, type of paper, type of toner used, number of pages per print job and so on. Under ideal conditions, the average drum life is estimated at approximately 12,000 pages.
Separate drum units last quite a bit longer than a toner cartridge and typically should be replaced after the use of 3-4 toners. Your printer should inform you when it`s time to replace the drum, but you can usually tell your drum is on it`s last legs if you start to see black spots or lines across the page.
Description: This error is primarily caused by a transfer alienation failure in which the ITB is stuck and unable to rotate, the SR9 sensor (the primary transfer roller disengagement sensor) has gone bad or the fuser drive assembly has failed.
To fix the error code 0x0000011b related to networked or shared printers, Microsoft says you should disable the print spooler privacy settings on both the Client PC (from which you work) and Print Server (Workstation to which the printer is attached).
The drive system the motor drives may be too tight causing an over current state in the motor. Use the feed motor (M101) drive test in the Component test to verify that the motor is not working.
This is a fault related to the feed motor. You can do only a couple of things: 1) You can check if the connectors of the feed motor are well connected both at DC controller and the motor itself.
Check for excessive wear on gears in Main Drive Assembly

An issue was identified with the material in one of the gears in the Main Drive Assembly for some of the early production units. This issue would cause excessive wear on the gear that eventually results in a 59.0C/59.00.

You can extend the drum life and keep it clean by occasionally cleaning the corona wire. You can simply do this by sliding the little plastic piece attached to the corona wire back and forth a couple of times. After you replace your drum, don`t forget to reset it.
Do Drum Units Expire? Fortunately, just like laser toners, drum units don`t expire, so you can safely keep extra units on hand if printing is a core part of your business or routine. The only consumable that expires is ink, which is printed on the cartridge itself.
A laser printer drum`s shelf life is approximately two years if the drum is still in its protective bag. Leave your printer`s drum in its protective bag until you`re ready to install the component.
The drum unit may need replacing if you notice the printer producing blurry, low-quality images. Black or colored toner spots on printouts also indicates a failing drum unit. In some cases, horizontal lines may develop across the printout every time the paper passes the failing part of the drum.
If one or more toner cartridges are installed incorrectly, this may result in a 54.2 carousel rotation error. This error is typically accompanied by a loud grinding noise. NOTE: The carousel is the rotating part under the top cover to which all four print cartridges attach.
Some drummers replace their drum sticks once a week, while others can go for months without replacing. In most cases, drummers use their drum sticks until they break or splinter. Although it`s not necessary to replace drum sticks as soon as they start fraying, it`s a good indication that they`re close to breaking.
If one or more toner cartridges are installed incorrectly, this may result in a 54.2 carousel rotation error. This error is typically accompanied by a loud grinding noise. NOTE: The carousel is the rotating part under the top cover to which all four print cartridges attach.
The four standard cartridges would be present attached to a rotating device called Carousel under the printer cover. The issues with the carousel rotation and the misplacement of the cartridges upon the printer devices would result in issues with the printer device called as printer error 54.2.
Recommended action. Turn the printer off, wait 15 seconds and turn the printer back on (using the power switch located on the back of the printer). The error code should not appear again.
The four standard cartridges would be present attached to a rotating device called Carousel under the printer cover. The issues with the carousel rotation and the misplacement of the cartridges upon the printer devices would result in issues with the printer device called as printer error 54.2.
Recommended action. Turn the printer off, wait 15 seconds and turn the printer back on (using the power switch located on the back of the printer). The error code should not appear again.

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