Samsung ml1640 print quality is faded down one side unit is only 4 months old and toner is half full

It sounds like the print quality issue you're experiencing with your Samsung CPL-325 printer may be caused by a few different factors. Here are some steps you can take to diagnose and resolve the problem:

1. Check the toner cartridges: The first step is to check the toner cartridges to make sure they are not empty or low on toner. If they are, replace them with new cartridges. Additionally, make sure that the toner cartridges are installed properly.
2. Check the drum unit: The drum unit is responsible for transferring toner to the paper during the printing process. If it is dirty or damaged, it can cause faded or streaky print quality. Try cleaning the drum unit with a soft, dry cloth or replace it if it appears damaged.
3. Check the paper: Ensure that you are using the correct type of paper for the printer. Using paper that is too thick, too thin, or too glossy can cause print quality issues. Try using high-quality, recommended paper for your printer.
4. Check the fuser unit: The fuser unit is responsible for fixing the toner to the paper. If it is dirty or damaged, it can cause print quality issues. Try cleaning the fuser unit with a soft, dry cloth or replace it if it appears damaged.
5. Check the transfer roller: The transfer roller helps transfer toner from the drum unit to the paper. If it is dirty or damaged, it can cause print quality issues. Try cleaning the transfer roller with a soft, dry cloth or replace it if it appears damaged.
6. Check the print driver settings: Make sure that the print driver settings are configured correctly for the type of paper and print quality you are using. Adjusting the print quality settings may help improve the print quality.

do let me know if it helps

Hello.
There are two reasons the fade happens. Running out of toner and the drum not responding correctly. The Drum is the unit that transfers the toner to the paper. if it gets damaged or dirty inconsistent print is usually the result. Try taking the toner out, shaking it and replacing it to see if it affects the print quality. if it does not price a replacement drum and toner, compare it to the price of a new printer and this will answer the second part of your question!!!
I hope this helps Regards GM

Open top cover and remove toner, shake toner cartridge and try a test print. IF image good then problem is low toner level in cartridge.

Dear sir,

1. open your printer cartridge drum cleaning blade unite wast toner clean.
2. open two side from your cartridge left side and right side
3. open plastic cork
4. filling toner
5. assembling again
6. start print

I am using canon toner in samsung printer 1640 it was going perfect now my print is getting Fade

The problem is the heat transfer unit in the printer. The heat unit on the right side is either not heating up at all or not enough to transfer the toner to the paper. If the printer is still on warranty it needs to be repaired by a tech. If the printer is off warranty, it's usually not worth fixing.

I found a solution that worked to eliminate the faded black stripe down the page thanks to a post by slamfix in another forum. The problem is related to ink build up on the blade edge of the black developer assembly in the imaging unit (the imaging unit contains 4 separate developers - yellow, blue, magenta, and black). The solution involves taking out the imaging unit, removing and cleaning the blade edge of the black ink developer until smooth. It took me about 15 minutes to complete and was fairly straightforward.

Detailed instructions with pictures can be found at http://losingambition.com/clp300imagefix/

If you the image is faded and your toner supply is good, the problem is the developer blades in the imaging unit. During the normal use of the printer, there is a buildup of toner that sticks on the developer blade. The developer blade meters the amount of toner that gets to the drum that ultimately makes it to the paper. As the toner buildup increases on the blade, less and less toner that gets to the drum cause the image to fade.

To fix this problem you will need to disassemble the imaging unit and clean the blades or buy a new imaging unit. I have clean my blades and I don't have 20000 images it is about 7000 and I have a document to show you if you are handy.

There is a defect in the Imaging Unit of these printers....if you replace the imaging unit, the problem of the faded black prints go away. If you have less than 7000 prints, you can call Samsung for a warrantied replacement. The Imaging Unit is supposed to last at least 20,000 prints.

It looks like the scanner unit having fault, get it replaced.