You can download a .pdf file of the User Manual for this printer for
free from the internet. It is a nice 102 page document with all sorts
of valuable information. Just type in:
Samsung ML-4500 Instruction Manual
and you can find a number of ways to get it for free.
Here is one link to follow:
Under light or faded prints the following is in the manual:
If a vertical white streak or faded area appears on the page:
The toner supply is low. You may be able to temporarily
extend the toner cartridge life. See edistributing the
Toneron page 6.2. If this does not improve the print
quality, install a new toner cartridge.
The paper may not meet paper specifications (for example,
the paper is too moist or too rough). See aper
Specificationson page A.2.
If the whole page is light, the print resolution setting is too
light or Toner Save Mode may be on. Adjust the print
resolution and Toner Save Mode within the printer
properties. See page 5.7 and 5.8 respectively.
A combination of faded and smeared defects may indicate
that the toner cartridge needs cleaning. See leaning the
Printeron page 6.4.
The surface of LSU part inside the printer may be dirty.
Clean the LSU. See leaning the Printer
Also, the software driver from Samsung offers a lot of settings for
different resolutions (sometimes a lower res will print darker)
and options such as: paper type, envelopes, stickers, etc, and with some
experimentation you will probably find one setting will print darker.
As the trouble shooting area suggests, try different paper, try
redistributing the toner in the cartridge, by removing the cartridge and
rocking it gently back and forth, change other printer properties, etc.
If you are interested in issues surrounding e-waste,
I invite you to enter the discussion at my blog:
> I have a Samsung ML-4500 b&w laser printer. The printing is o>ay for
> my notes, but not dark enough to give to someone. I've only >rinted
> 20 pages, but it's consistent, not getting any lighter or darke>, so I
> figure it's not running out of toner. I see no method on the >achine
> or in the manual to darken the>pri>t.
> I just got i> us>d.
> Am I stuck? Is this what some laser printers are like?