Samsung SCX4216 MF

Your toner cartridge may be the culprit.
Take the cartridge out and shake sideways and up/down. Reinstall it and try again.
If it's still printing faded side, replace the cartridge.

this problem is shown if you need to renew the drum unit of the printer, some samsung technical shops have refresched one on stock for half of the new price.

sir/mam drum do go bad after so many copies and prints. normally machine will indicate when that is needed.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

It needs servicing.

Most of the time when you have faded copies it is due to the processing section of the copier. An number of things can cause this:

1. Dirty optics
2. Copier not level from to back
3. Dirty charge or transfer corona
4. Bad drum unit
5. Contaminated developer section
6. Dirty Laser unit
7. or Worn fuser unit

These should be taken care of by your local Authorized dealer.

it is possible that this is a fuser prob, fuser works applying heat and pressure, if the roller, either the pressure roller or the fuser roller is defective this is most likely will happen too, you might want to  check the number of copies or prints made

If it only happens with the black then you need to change out the black toner cartridge. The good news is isn't doesn't happen with color so it more than likely not the printer but the toner.

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I was able to fix it by taking off the top of the printer. This involved taking off 4 screws on the top of the printer. I then had to disconnect the wires going to the control panel by unhooking them from the right side. I then located a thin rectangular box which I'm assuming houses the laser. I removed this with 4 more screws and turned it over. There was a little metal flap that I moved back and below was the mirror the lasers shoot on before going onto the toner.

In the same spot where I was having fading, I noticed a lot of toner on the mirror, so I cleaned it of, put it back together, and the fading was gone.

This was after I tried a new toner and maintenance kit.

Hope this helps

I have a SCX-4100 Samsung, replaced the tonger cartridge, it was working fine for a few hundred sheets of printing, but after that, the left side of the page was printed very light, faded.
If I run the "Clean Drum", it will print a litter better, but still faded.
What can I do to correct this problem?
Thank you
TT