HP LaserJet 4

How to Identify and Fix Common Problems ?

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Here are the most common causes of a printer printing faded text or images: Low ink or toner levels. Toner sticking to the fuser roller or problems with the transfer roller. Low ink or toner density settings.
Check the toner darkness settings.

Sometimes light print can be remedied by simply changing the toner darkness setting in the printer. To change the setting, go to MENU>>SETTINGS>>QUALITY MENU>>TONER DARKNESS. Increase the darkness and send a test print to see if that fixes the issue.

Step 4: Exposing

Every area of the drum exposed to the laser has its surface charge reduced to about 100 volts DC. An invisible latent print is generated as the printer`s drum turns. The image that will ultimately be printed exists for the first time as a thin layer of electrons on the OPC drum.

A common cause of faded, faint printouts from your inkjet printer is dried ink particles causing a blockage in your printer. The printheads on an ink cartridge can be become blocked if the printer is not used for a period of time, so it is recommended to print a few pages each month to maintain the print quality.
Check the ink levels

Sometimes, the printer may not print black ink because it is low or empty. You can check the ink levels on the printer`s display, or by using the software that came with your printer. If the ink level is low, replace the cartridge or refill it according to the manufacturer`s instructions.

Adjust the application settings and the printer settings to the highest possible resolution. Both of these features can typically be accessed from the “Print” menu. Dpi settings can range between 72 dpi and 2400 dpi. Choose the highest dpi setting available for best results when using a laser printer.
Make sure the correct printer is selected, then click the Properties button. Make sure the Orientation is set to Portrait, then click Advanced. Here make sure the Paper Size is set to 100x150mm or a 4×6″ option. Click Ok.
HP printers will generally work with any high-quality paper with a quality assured preference to HP paper. This means “top quality” papers of a brand other than HP will usually work in your printer.
HP InkJet printers are best for photo printings, graphics-heavy printing, small to mid-size businesses, and home office use.
So a printed piece designated as 4/4 has the four CMYK ink colors applied to it on both sides. 4/1 is pronounced “four over one” and means one side of the printed piece has the four CMYK ink colors applied to it but the other side only receives one ink color.
4/0 and 4/4 are common printing terminology terms and basically means single or double sided printing. 4/0 refers to printing 4 colors on one side of the paper and 0 colors on the other side of the paper. 4/4 means 4 colors printed on both sides of the paper.
You can make prints lighter or darker by adjusting the print density setting in the printer driver`s dialog box or the RJ Utility. -5 is the lightest, and +5 is the darkest.
You can visually inspect the remaining cartridge levels on your printer. If they are full but you still cannot print properly, check the cartridge`s expiry date. Expired ink cartridges often dry up which causes problems in the print results.
Printer Faults – Faded One Side of a Print. Fading at a margin generally suggests: an imbalance of the toner, all of it is unshiftably at one side of a cartridge. The toner agitators or stirrers should move the problem but don`t invariably succeed.
Check the ink levels

Sometimes, the printer may not print black ink because it is low or empty. You can check the ink levels on the printer`s display, or by using the software that came with your printer. If the ink level is low, replace the cartridge or refill it according to the manufacturer`s instructions.

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