Samsung SCX 4321 User Manual

Troubleshooting
9.10
Back of 
printouts are 
dirtyCheck for leaking toner. Clean the inside of the machine. 
See ?$paratext>? on page 8.2.
Black pages• The toner cartridge may not be installed properly. 
Remove the cartridge and reinsert it.
• The toner cartridge may be defective and need 
replacing. Remove the toner cartridge and install a new 
one. See ?$paratext>? on page 8.5.
• The machine may require repair. Contact a service 
representative.
Loose toner• Clean the inside of the machine. See...

Troubleshooting
9.11
Scanning Problems
Fax Problems 
(Only for SCX-4521F/ SCX-4521FR)
ConditionSuggested solutions
The scanner does 
not work.• Make sure that you place the document to be 
scanned face down on the document glass, or face 
up in the Automatic Document Feeder.
• There may not be enough available memory to hold 
the document you want to scan. Try the Prescan 
function to see if that works. Try lowering the scan 
resolution rate.
• Check that the USB or parallel cable is connected...

Troubleshooting
9.12
Common Linux Problems
ProblemPossible Cause and Solution
The machine 
doesn’t print.• Check if the printer driver is installed in your system. 
Open MFP configurator and switch to the Printers tab in 
Printers configuration window to look at the list of 
available printers. Make sure that your machine is 
displayed on the list. If not, please, invoke Add new 
printer wizard to set up your device.
• Check if the printer is started. Open Printers 
configuration and select your machine...

Troubleshooting
9.13
The machine 
doesn’t scan. 
(continued)• To identify the source of the problem, you should open 
MFP ports configuration and select the port assigned to 
your scanner. MFP port’s symbol /dev/mfp0 corresponds 
to LP:0 designation displayed in the scanners’ options, /
dev/mfp1 relates to LP:1 and so on. USB ports start at /
dev/mfp4, so scanner on USB:0 relates to /dev/mfp4 
respectively and so forth sequentially. In the Selected 
port pane you can see if the port is occupied by some...

Specifications
10.1
10Specifications
This chapter includes:
• General Specifications
• Scanner and Copier Specifications
• Printer Specifications
• Facsimile Specifications (Only for SCX-4521F/ SCX-
4521FR)
• Paper Specifications
General Specifications
ItemDescription
Automatic document 
feederUp to 30 sheets (20 lb, 75 g/m2 bond)
ADF document size Width: 5.6 to 8.5 inches (142 to 216 mm)
Length: 5.8 to 14 inches (148 to 356 mm)
Paper input capacityTray with multi-pages: 150 multi-pages for plain 
paper...

Specifications
10.2
Scanner and Copier 
Specifications
ItemDescription
Compatibility TWAIN standard / WIA standard
Scanning methodADF and Flat-bed CIS (Contact Image Sensor) 
module
ResolutionOptical: 600 x 600 dpi (Mono and color)
Enhanced: 4,800 x 4,800 dpi 
Effective scanning 
lengthPlaten: 11.7 in. (297 mm)
ADF: 14 in. (356 mm)
Effective scanning 
widthMax. 8.2 in. (208 mm)
Color bit depth 24 bit
Mono bit depth1 bit for Black & White mode
8 bit for Gray mode
Copy speed
*
*. Copy Speed is based on...

Specifications
10.3
Facsimile Specifications 
(Only for SCX-4521F/ SCX-4521FR)
ItemDescription
Compatibility ITU-T Group 3
Applicable linePublic Switched Telephone Network (PSTN) or 
behind PABX
Data coding MH/MR/MMR (ECM Mode)/JPEG
Modem speed 33.6 Kbps
Transmission speedApprox. 3 seconds/page
* Transmission time applies to memory 
transmission of text data with ECM compression 
using only ITU-T No.1 Chart.
Maximum document 
lengthPlaten: 11.7 in. (297 mm)
ADF: 14 in. (356 mm)
Paper size Letter, A4,...

Specifications
10.4
Supported Sizes of Paper
NOTE: You may experience jams when using print materials 
with a length of less than 5 in. (127 mm). For optimum 
performance, ensure that you are storing and handling the 
paper correctly. Please refer to ?$paratext>? on page 10.5.
PaperDimensions*WeightCapacity**
Letter8.5 x 11 in. 
(216 x 279 mm)
• 16 to 24 lb 
(60 to 90 g/m
2 
bond) for the tray 
with multi-pages 
feeding
• 16 to 43 lb 
(60 to 165 g/m
2 
bond) for the tray 
with single page 
feeding and...

Specifications
10.5
Paper Specifications
Paper Output Capacity
Paper Storage Environment
Paper storage environmental conditions directly affect the feed 
operation.
Ideally, the machine and paper storage environment should be 
at or near room temperature, and not too dry or humid. 
Remember that paper is hygroscopic; it absorbs and loses 
moisture rapidly.
Heat works with humidity to damage paper. Heat causes the 
moisture in paper to evaporate, while cold causes it to 
condense on the sheets. Heating...

Specifications
10.6
Envelopes with Double Side Seams
Double side-seams construction has vertical seams at both 
ends of the envelope rather than diagonal seams. This style 
may be more likely to wrinkle. Be sure the seam extends all the 
way to the corner of the envelope as illustrated below.
Envelopes with Adhesive Strips or Flaps
Envelopes with a peel-off adhesive strip or with more than one 
flap that folds over to seal must use adhesives compatible with 
the heat and pressure in the machine. The...