HP Color LaserJet 8500
How to Identify and Fix Common Problems ?
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Print density is the measurement of light reflected off of the substrate, or how dark the print appears after each press strike. When looking at the definition of print density it is easy to see how the materials that come in direct contact with the printing surface play a crucial role in print density quality.
The density setting enables you to adjust the lightness/darkness of scanned originals for sending. The image quality setting enables you to improve the image quality of scanned originals for sending, simply by selecting the original type ([Text], [Text/Photo], or [Photo]) that closely matches your originals.
Wipe the sensor window with one of the cotton swabs provided in the Printer Cleaning Kit, slightly dampened (not soaked) with isopropyl alcohol, to remove dried ink. If the sensor window is heavily coated with dry ink, you may need to apply some pressure while wiping, helping the cotton to absorb the ink.
Why is it important to clean a laser printer? Printing is vital to all businesses so ensuring your laser printer is thoroughly cleaned is crucial as it allows your machine to continue working efficiently. Cleaning a laser printer is easy with the correct equipment, however they are prone to dust and debris.
During the printing process, paper, toner and dust particles can accumulate inside the printer. Over time, this buildup can cause print-quality problems such as toner specks or smearing. This printer has a cleaning mode that can correct and prevent these types of problems.
For cleaning, HP recommends using HP Equipment Cleaning Wipes, but you can use an HP-approved lint-free wipe and deionized or distilled water. Note: If dark spots appear on back side of prints, clean drum screen. Note: If minilab prints more than 2000 prints each day, clean drum screen up to twice daily.
Density is the most basic measurement of the mechanical characteristics of print. Reflective density is calculated from the amount of light that is reflected from the substrate (paper, film, etc.) and the ink. It is a simple way to evaluate changes in the ink film thickness or ink concentration that is being laid down.
For most documents, 300 dpi is sufficient enough to be of good legibility and to provide adequate OCR results. In some cases 200 dpi may be adequate for simply retaining a print copy of a document. Scans at 400 and 600 dpi will results in slower scan speeds as the scanner detect fine details in your document.
Usually the best dpi for scanning documents – balancing readability and file size – is 300 dpi. It makes the document easy to read and share. Also, font size can affect the dpi you choose. Standard font sizes, 10-point and up, are fine at 300 dpi.
One sensor is located in the printer carriage. A second sensor—the Auto Sense sensor—is located in the back of the printer near the paper `clean out` area. Each sensor performs a specific set of media detection functions.
In the majority of cases, printers` self-cleaning mechanisms clean blocked printer heads by flushing the nozzles with air. The air works to dislodge dry ink inside the cartridge channels and also push it out. The intensity of the self-cleaning process of printers is usually not very strong.
Printhead cleanings can take about 1 or 2 minutes and they do use some ink to run through the cleaning process. Once complete, print out a test page to compare print quality. If the print results look good, you can continue printing.
Clean the interior of the printer every 6 months or 300 hours of operation, whichever comes first. Clean and remove paper waste, dirt, dust and ribbon shreds. suction nozzle. Do not clean any interior working parts with the suction nozzle to avoid possible damage to the printer.
Whilst you should always seek the help of a professional, you can clean a laser printer yourself providing you have the time and equipment. Unlike inkjets, laser printers don`t use liquid ink in the print process – thus, they`re less of a pain to clean.
Hold a piece of lens tissue above the mirror and place a few drops of acetone on the paper. Lower the lens tissue onto the optic and pull it over the surface. Note that the dry part of the tissue helps remove acetone residue. Repeat the above step until the optic is clean.
The printer will start cleaning the print head and the processing light will begin flashing. Print head cleaning takes about thirty seconds to complete.
Regular cleanings will extend the life of your printer and its printhead. Keeping the moving parts clean inside your printer will prevent ribbon breakage. Ensure your printer warranty stays valid by regularly cleaning the printer. Image quality will be maintained as cleanings prevent resin build-up on the rollers.
If you still see white or dark lines or missing nozzles in your printouts, even after cleaning the print head several times, you can run a Power Cleaning. If you do not see improvement after running a Power Cleaning, turn off the product and wait at least 12 hours before running another Power Cleaning.
A standard Print Head Cleaning cycle is done by clicking `Cleaning` on the Maintenance tab, then waiting a little bit until a message comes up; confirm it and click `Print Check Pattern. ` From this you can then tell what sort of Deep Clean you need to do by which lines (black or colour) are faded.
During the cleaning process, remnants of toner on the drum are scraped away by a rubber-cleaning blade into a debris cavity. Electrical charges remaining on the drum from the prior print job are defused by electrostatic erase lamps inside laser printers.
Paper Jams
This is a common laser printer problem. Primary causes include grime, dust, worn rollers, or incorrect paper weight. The most basic way to prevent paper jams is simply through regular cleaning of your printer. Also, replace parts as needed.
A printer printing lines on the page are normally caused by a blocked, dirty, or damaged print head. Blocked ink cartridge nozzles, or not removing protective seals correctly when you installed a new ink cartridge can also cause missing lines of print.
The density setting can be adjusted from 1 to 5, with 3 the default. The lower the setting the lower the amount of toner used. There might also be device specific settings which are described in the applicable Product User Guide.
“Printer properties” or “Properties” may be displayed, depending on the application. Display the [Quality] sheet of the print settings screen. On the [Quality] sheet, click [Advanced Settings]. In the [Advanced Settings] dialog box, select [List of Settings] [Toner Density] [Adjust] → click [Details].
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
HP Officejet Pro 8500 Carriage Replacement steps
ANSWER : Hi Mark:
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HP Color LaserJet 8500
HP Officejet Pro 8500 Wireless with fake paper jam
ANSWER : HP Officejet is by far one of the frustrating piece of equipment I have ever owned. I bought it as unused in the package, at that point no warranty left. less than 6 months and 500 pages the white cog gear wheel broke. Luckily with instructions in this site I manage to glue it back together. Then I bought new ink – problems started as they were not original HP 30$ per cartridge. Ordered originals (here in China), took over one week to get them. Then found out that printhead needed to be replaced => more than 100$ spent. Still constant problems: If my wife kids print, I need to be stand-by as you never know what happens. Really an Office level equipment. After cleaning one paper jam I broke the encoder tape, took me another 4 hours to get it fixed. Then broke the cog gear again and got it displaced. Another 4 hours. Only reason I am not throwing this s***t out of window is that there are still ink left. Luckily this drinks them like a horse, for sure I will no more buy new ink. I will get a new laser instead, and not from HP. About cog wheel fixing: make sure that the white wheel is positioned correctly so that the small torx in shaft goes into the slit in the white wheel. When fitting the black cover back, make sure that the white washers on both sides fit into to slits of the black cover. Good luck.
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HP Color LaserJet 8500
HP CLJ 8550 does not recognize new Magenta toner
ANSWER : There’s a menu option to tell the printer it has a fresh toner cartridge.
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HP Color LaserJet 8500
HP laser jet 3015 "Upgrade Error Call HP Support"
ANSWER : rgtr
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HP Color LaserJet 8500
Cleaning a CLJ 2500 without the toolbox software.
ANSWER : New upload location for the cleaning files. https://mega.nz/#!ihgWVYgb
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HP Color LaserJet 8500
Cleaning HP 4000 duplexer
ANSWER : I know this is a very old post, but I haven’t been able to find any information regarding how to disassemble this duplexer. The 6 screw’s easy, but how do you “prise” off the left cover? If I do it wrong, I know I will break one or more molded hooks on the cover. Can someone please help?
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HP Color LaserJet 8500
HP CLJ 2600 misaligned colours
ANSWER : Misaligned colors or printing.
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HP Color LaserJet 8500
HP 26 vs HP 29 cartridge compatibility
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HP Color LaserJet 8500