Imaging Unit needs to be Replaced

Many of today's printers have a "toner save" option, which makes the black appear lighter, and I'm pretty sure this isn't your problem. However, I wanted to rule-out the obvious first, which is just a setting.
If you're seeing the black lighter in vertical "stripes" or segments in your printing, then it's most likely due to a dirty toner cartridge (but you said you replaced it), or cleaning the LSU inside the unit (as it says in the owners manual).
Just in case you don't have the manual handy, here's an online link to it:http://downloadcenter.samsung.com/content/UM/200611/20061122152910875_CLX-3160_English.pdf

I hope this helps!

I don't think clearing the counters will work for the imaging unit. Just like the toner cartridges, as each time the printer is used, it ticks off another count off the chip. And when the chip reaches full count, you will need to replace the imaging unit.

You have to buy a new fuser unit. They have it at these sites:


http://www.facsimile.com/main/supplies/machine_id/101134/Samsung+CLX-3160FN+Fax+Machine+Toner+Drum.html


$102.15 Samsung CLX-3160FN Samsung Genuine Brand New Fuser Unit
Fuser Unit Good for Approx. 100,000 Mono Copies or 50,000 Color Copies (JC96-04088B


http://www.amatteroffax.com/itempagey_invid_1383681_d_samsung-imaging-kit-clp-300.html


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

You will need to replace the imaging unit. It the part where the toner cartridges and waste toner tank sits. The part number is CLP-R300A. You can find it online or at your local office supply store.

If the black toner prints like the image below with alternating bands of light and dark printing, the problem lies with your imaging unit. Specifically the developer blades in the imaging unit has toner build up on the blades. The more you use a particular color, the more it builds up to the point that it exhibits itself as faded images on the paper.

It can be fixed by replacing the imaging unit for $100+, but it will reappear again after sometime. Or you can fix the problem yourself and save yourself $100. You will need to open the imaging unit and clean the blades. I have a description on how to do this in my tips section. Or your can click on this link, http://www.fixya.com/support/r4120906-clean_developer_blades_samsung_clp_300. Hopes this helps you.

TRY FIRMWARE

The imaging unit is that whole assembly that the toners are plugged into inside the front door of your machine. It a consumable unit available at many office supply stores. The instructions to replace the unit are packed inside the box with the new unit.

Kindly take out the imaging unit out of the printer and take out and put it properly.

If this did not fix you may try using the imaging unit from other printer.
If this did not solve then visit a service center or buy its Imaging unit.

try the transfer belt/roller

No, the imaging unit will only reset back to zero if you replaced it.