Samsung SCX 4321 User Manual

							Maintenance
8.7
Replacing the ADF Rubber Pad
You can purchase an ADF rubber pad from your Samsung 
dealer or the retailer where you bought your machine.
1Open the ADF cover.
2Remove the ADF rubber pad from the ADF, as shown.
3Insert a new ADF rubber pad into place.
4Close the ADF cover.
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							Troubleshooting
9.1
9Troubleshooting
This chapter gives helpful information for what to do if you 
encounter an error.
This chapter includes:
• Clearing Document Jams
•Clearing Paper Jams
• Clearing LCD Error Messages
• Solving Other Problems
• Common Linux Problems
• Common Macintosh Problems
Clearing Document Jams
When a document jams while passing through the ADF 
(Automatic Document Feeder), “[Document Jam]” appears on 
the display.
Input Misfeed
1Remove any remaining page(s) from the ADF.
2Open the ADF cover.
3Pull the document gently out of the ADF.
4Close the ADF cover. Then load the removed page(s), if 
any, back into the ADF.
NOTE: To prevent document jams, use the document glass for 
thick, thin, or mixed paper-type documents.
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							Troubleshooting
9.2
Exit Misfeed
1Remove any remaining page(s) from the ADF.
2Open the ADF cover.
3Remove the misfed documents from the document output 
tray.
4Close the ADF cover. Then load the removed page(s), if 
any, back into the ADF.
Clearing Paper Jams
When a paper jam occurs, “Paper Jam” appears on the display. 
Refer to the table below to locate and clear the paper jam.
To avoid tearing the paper, pull out the jammed paper gently 
and slowly. Follow the instructions in the following sections to 
clear the jam. 
MessageLocation of JamGo to
[Paper Jam 0]
Open/Close DoorIn the tray or manual 
traypage 9.2
[Paper Jam 1]
Open/Close DoorIn the fuser area or 
around the toner 
cartridge.page 9.3
[Paper Jam 2]
Check InsideIn the paper exit area page 9.3
In the Tray
1Remove the jammed paper in the tray by gently pulling it 
straight out.
If there is any resistance and the paper does not move 
when you pull, or if you cannot see the paper in this area, 
check the fuser area around the toner cartridge. See 
page 9.3. 
2Open and close the front door to resume printing.
In the Manual Tray
1Remove the jammed paper in the tray by gently pulling it 
straight out.
If there is any resistance and the paper does not move 
when you pull, or if you cannot see the paper in this area, 
check the fuser area around the toner cartridge. See 
page 9.3. 
2Open and close the front door to resume printing.
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							Troubleshooting
9.3
In the Fuser Area or Around the Toner 
Cartridge
NOTE: The fuser area is hot. Take care when removing paper 
from the machine.
1Open the front door.
2Pull the toner cartridge out, lightly pushing it down.
3If necessary, pull the manual tray out.
4Remove the jammed paper by gently pulling it straight 
out.
5If necessary, push the manual tray back into the machine.
6Reinstall the toner cartridge and close the front door. 
Printing automatically resumes.
In the Paper Exit Area
1Open and close the front door. The jammed paper 
automatically exits the machine.
If the paper does not exit, continue to step 2.
2Gently pull the paper out of the output tray. 
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							Troubleshooting
9.4
3If there is any resistance and the paper does not move 
when you pull, or if you cannot see the paper in the output 
tray, open the rear cover by pulling the tab on it.
4Remove the jammed paper by gently pulling it straight 
out.
CAUTION: Inside of the machine is hot. Take care when 
removing paper from the machine.
5Close the rear cover.
6Open and close the front door to resume printing.
Tips for Avoiding Paper Jams
By selecting the correct paper types, most paper jams can be 
avoided. When a paper jam occurs, follow the steps outlined in 
?$paratext>? on page 9.2. 
• Follow the procedures in ?$paratext>? on page 2.3. 
Ensure that the adjustable guides are positioned 
correctly.
• Do not overload the tray. 
• Do not remove paper from the tray while your machine is 
printing.
• Flex, fan, and straighten the paper before loading. 
• Do not use creased, damp, or highly curled paper.
• Do not mix paper types in the tray.
• Use only recommended print materials. See 
?$paratext>? on page 10.3.
• Ensure that the recommended print side of print 
materials is facing up in the tray.
Clearing LCD Error Messages
DisplayMeaningSuggested solutions
Cancel ?
1:Yes  2:No
(only for SCX-
4521F/ SCX-
4521FR)Your machine’s 
memory has become 
full while trying to 
store a document into 
memory.To cancel the fax job, press 
the 
1 button to accept “Yes”. 
If you want to send the pages 
that have been successfully 
stored, press the 
2 button to 
accept “No”. You should send 
the remaining pages later, 
when memory is available.
[Comm. Error]
(only for SCX-
4521F/ SCX-
4521FR)The machine has a 
communication 
problem.Ask the sender to try again.
CRU Fuse Error The toner cartridge is 
not installed correctly.Install the toner cartridge 
correctly. See ?$paratext>? 
on page 8.5.
[Document Jam] The loaded document 
has jammed in the 
ADF (Automatic 
Document Feeder).Clear the document jam. See 
?$paratext>? on page 9.1.
[Front or Rear]
[Cover Open]The front door or rear 
cover is not securely 
latched.Close the door until it locks 
into place.
Enter Again You entered an 
unavailable item.Enter the correct item again.
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							Troubleshooting
9.5
Low Heat Error There is a problem in 
the fuser unit.Unplug the power cord and 
plug it back in. If the problem 
persists, please call for 
service. Open Heat Error
[Over Heat]
Group Not
Available
(only for SCX-
4521F/ SCX-
4521FR)You have tried to 
select a group location 
number where only a 
single location 
number can be used, 
such as when adding 
locations for a 
broadcast operation.Use a speed dial number or 
dial a number manually using 
the number keypad.
[Incompatible]
(only for SCX-
4521F/ SCX-
4521FR)The remote machine 
did not have the 
requested feature, 
such as a delayed 
transmission.
This message also 
occurs if the remote 
machine does not 
have enough memory 
space to complete the 
operation you are 
attempting.Reconfirm the remote 
machine’s features.
[Line Busy]
(only for SCX-
4521F/ SCX-
4521FR)The receiving party 
did not answer or the 
line is already 
engaged.Try again after a few minutes.
[Line Error]
(only for SCX-
4521F/ SCX-
4521FR)Your machine cannot 
connect with the 
remote machine or 
has lost contact 
because of a problem 
with the phone line.Try again. If the problem 
persists, wait an hour or so 
for the line to clear and try 
again.
Or, turn the ECM mode on. 
See ?$paratext>? on 
page 7.14.
Load Document You have attempted 
to set up a copy or fax 
operation with no 
document loaded into 
the ADF.Load a document into the ADF 
and try again.
[LSU Error] A problem has 
occurred in the LSU 
(Laser Scanning Unit).Unplug the power cord and 
plug it back in. If the problem 
persists, please call for 
service.
Memory Dial Full 
(only for SCX-
4521F/ SCX-
4521FR)The fax jobs queue in 
the memory is full.Cancel unnecessary fax jobs 
in the memory.
DisplayMeaningSuggested solutions
Memory Full
(only for SCX-
4521F/ SCX-
4521FR)The memory is full. Delete unnecessary 
documents and retransmit 
after more memory becomes 
available. Alternatively, split 
the transmission into more 
than one operation.
[No Answer]
(only for SCX-
4521F/ SCX-
4521FR)The receiving fax 
machine has not 
answered after 
several redial 
attempts.Try again. Make sure that the 
receiving machine is 
operational.
[No Cartridge] The toner cartridge is 
not installed.Install the toner cartridge. 
See ?$paratext>? on 
page 2.2.
Not
 Assigned
(only for SCX-
4521F/ SCX-
4521FR)• The speed dial 
location you tried to 
use has no number 
assigned to it.
• The ID you entered 
is not assigned
.
• Dial the number manually 
using the number keypad or 
assign the number. For 
storing a number, see 
?$paratext>? on page 7.8.
• Enter the correct ID. 
.
[No Paper]
Add PaperThe paper in the tray 
has run out.Load paper in the tray. See 
?$paratext>? on page 2.3.
Operation 
Not Assigned
(only for SCX-
4521F/ SCX-
4521FR)You are doing the 
Add/Cancel operation, 
but there are no jobs 
waiting.Check the display to see if 
there are any scheduled jobs. 
The display should indicate 
them in Standby mode; for 
example, Delay Fax.
Out of Range The current date and 
time you entered is 
not correct
.
Enter the correct date and 
time
.
[Paper Jam 0]
Open/Close DoorPaper has jammed in 
the feeding area of 
the tray.Clear the jam. See 
?$paratext>? on page 9.2.
[Paper Jam 1]
Open/Close DoorPaper has jammed in 
the fuser area or 
around the toner 
cartridge.Clear the jam. See 
?$paratext>? on page 9.3.
[Paper Jam 2]
Check InsidePaper has jammed in 
the paper exit area.Clear the jam. See 
?$paratext>? on page 9.3.
[Power Failure] Power has turned off 
then on and the 
machine’s memory 
has not been saved.The job which you were trying 
to do before the power failure 
must be completely re-done.
DisplayMeaningSuggested solutions
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							Troubleshooting
9.6
Remove Documents
from ADFThe Favorite Copy 
button is set to Clone, 
Autofit, ID Card Copy 
or Poster and you 
press the button.The Clone, Autofit, ID Card 
Copy or Poster feature does 
not work with ADF. Remove 
the documents in the ADF.
[Retry Redial?]
(only for SCX-
4521F/ SCX-
4521FR)The machine is 
waiting for a specified 
time interval to redial 
a previously busy 
station.You can press 
Enter to 
immediately redial, or 
Stop/
Clear
 to cancel the redial 
operation.
Scanner  Locked The scanner module is 
locked.Upload the power cord and 
plug it back in.
[Stop Pressed] The 
Stop/Clear 
button has been 
pressed during a copy 
or fax operation.Try again.
[Toner Empty] The toner cartridge 
has run out. Replace the toner cartridge 
with a new one. See 
?$paratext>? on page 8.5.
[Toner Low] The toner is almost 
empty.Take out the toner cartridge 
and gently shake it. By doing 
this, you can temporarily 
reestablish printing 
operations. See ?$paratext>? 
on page 8.5.
DisplayMeaningSuggested solutions
Solving Other Problems
The following chart lists some conditions that may occur and 
the recommended solutions. Follow the suggested solutions 
until the problem is corrected. If the problem persists, please 
call for service.
Paper Feeding Problems
ConditionSuggested solutions
Paper is jammed 
during printing.Clear the paper jam. See ?$paratext>? on page 9.2.
Paper sticks 
together.• Ensure that there is not too much paper in the tray. 
The tray can hold up to 150 sheets of paper, 
depending on the thickness of your paper.
• Make sure that you are using the correct type of 
paper. See ?$paratext>? on page 10.3
.
• Remove paper from the tray and flex or fan the 
paper.
• Humid conditions may cause some paper to stick 
together.
Multiple sheets of 
paper do not feed.• Different types of paper may be stacked in the tray. 
Load paper of only one type, size, and weight.
• If multiple sheets have caused a paper jam, clear 
the paper jam. See ?$paratext>? on page 9.2.
Paper does not feed 
into the machine.• Remove any obstructions inside the machine.
• Paper has not been loaded correctly. Remove paper 
from the tray and reload it correctly.
• There is too much paper in the tray. Remove excess 
paper from the tray.
• The paper is too thick. Use only paper that meets 
the specifications required by the machine. See 
?$paratext>? on page 10.3.
The paper keeps 
jamming.• There is too much paper in the tray. Remove excess 
paper from the tray. If you are printing on special 
materials, use one sheet of paper at a time.
• An incorrect type of paper is being used. Use only 
paper that meets the specifications required by the 
machine. See ?$paratext>? on page 10.3.
• There may be debris inside the machine. Open the 
front door and remove the debris.
Transparencies stick 
together in the 
paper exit.Use only transparencies specifically designed for laser 
printers. Remove each transparency as it exits from 
the machine.
Envelopes skew or 
fail to feed 
correctly.Ensure that the paper guides are against both sides of 
the envelopes.
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							Troubleshooting
9.7
Printing Problems
ConditionPossible causeSuggested solutions
The machine 
does not 
print.The machine is not 
receiving power.Check the power cord 
connections. Check the power 
switch and the power source.
The machine is not 
selected as the default 
printer.Select 
your printer as your 
default printer in your Windows.
Check the machine for 
the following:
• The front door is not 
closed.
• Paper is jammed.
• No paper is loaded.
• The toner cartridge 
is not installed.After locating the problem, clear 
it.
• Close the door.
• Clear the paper jam. See 
?$paratext>? on page 9.2.
• Load paper. See ?$paratext>? 
on page 2.3.
• Install the toner cartridge. See 
?$paratext>? on page 2.2.
If a printer system error occurs, 
contact your service 
representative.
The connection cable 
between the computer 
and the machine is not 
connected properly.Disconnect the printer cable and 
reconnect it.
The connection cable 
between the computer 
and the machine is 
defective.If possible, attach the cable to 
another computer that is working 
properly and print a job. You can 
also try using a different printer 
cable.
The port setting is 
incorrect.Check the Windows printer setting 
to make sure that the print job is 
sent to the correct port, for 
example, LPT1. If the computer 
has more than one port, make 
sure that the machine is attached 
to the correct one.
The machine may be 
configured incorrectly. Check the printer properties to 
ensure that all of the print 
settings are correct. 
The printer driver may 
be incorrectly 
installed.Repair the printer software. For 
details, see 
Software User’s 
Guide
. 
The machine is 
malfunctioning.Check the display message on the 
control panel to see if the 
machine is indicating a system 
error.
The machine 
selects print 
materials 
from the 
wrong paper 
source.The paper source 
selection in the printer 
properties may be 
incorrect.For many software applications, 
the paper source selection is 
found under the 
Paper tab within 
the printer properties. Select the 
correct paper source. For details, 
see 
Software User’s Guide.
A print job is 
extremely 
slow.The job may be very 
complex.Reduce the complexity of the 
page or try adjusting the print 
quality settings.
The maximum print speed of your 
machine is 20 PPM for Letter-sized 
paper and 20 PPM for A4-sized 
paper.
If you are using 
Windows 98/Me, the 
Spooling Setting may 
be set incorrectly. From the 
Start menu, choose 
Settings and Printers. Right-
click the 
your printer icon, 
choose 
Properties, click the 
Details tab, and then choose the 
Spool Settings button. Select 
the desired spool setting.
Half the page 
is blank.The page orientation 
setting may be 
incorrect.Change the page orientation in 
your application. For details, see 
Software User’s Guide.
The paper size and the 
paper size settings do 
not match.Ensure that the paper size in the 
printer driver settings matches 
the paper in the tray.
Or, ensure that the paper size in 
the printer driver settings 
matches the paper selection in the 
software application settings you 
use.
The machine 
prints, but the 
text is wrong, 
garbled, or 
incomplete.The printer cable is 
loose or defective.Disconnect the printer cable and 
reconnect. Try a print job that you 
have already printed successfully. 
If possible, attach the cable and 
the machine to another computer 
and try a print job that you know 
works. Finally, try a new printer 
cable.
The wrong printer 
driver was selected.Check the application’s printer 
selection menu to ensure that 
your machine is selected.
The software 
application is 
malfunctioning.Try printing a job from another 
application.
The operating system 
is malfunctioning.Exit Windows and reboot the 
computer. Turn the machine off 
and then back on again.
ConditionPossible causeSuggested solutions
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							Troubleshooting
9.8
Pages print, 
but are blank.The toner cartridge is 
defective or out of 
toner.Redistribute the toner, if 
necessary. See ?$paratext>? on 
page 8.5.
If necessary, replace the toner 
cartridge.
The file may have 
blank pages.Check the file to ensure that it 
does not contain blank pages.
Some parts, such as 
the controller or the 
board, may be 
defective.Contact a service representative.
An error 
occurs 
repeatedly 
when you are 
printing with 
the USB 
connection.When the USB mode is 
set to “Fast”, some PC 
user may experience 
poor USB 
communication.Change the USB mode to “Slow”. 
To do so, follow these steps:
1. Press 
Menu until “Machine 
Setup” appears on the display.
2. Press the scroll 
button (  or  ) 
until “USB Mode” appears on 
the bottom line and press 
Enter.
3. Press the scroll 
button (  or  ) 
to select “Slow”.
4. Press 
Enter to save the 
selection.
5. Press 
Stop/Clear to return to 
Standby Mode. 
ConditionPossible causeSuggested solutionsPrinting Quality Problems
If the inside of the machine is dirty or paper has been loaded 
improperly, you may notice a reduction in print quality. See the 
table below to clear the problem. 
ConditionSuggested solutions
Light or faded 
print
If a vertical white streak or faded area appears on the 
page:
• The toner supply is low. You may be able to temporarily
•  extend the toner cartridge life. See ?$paratext>? on 
page 8.5. 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 
?$paratext>? on page 10.3.
• If the entire page is light, the print resolution setting is 
too low or the toner save mode is on. Adjust the print 
resolution and turn the toner save mode off. For 
details, see 
Software User’s Guide and 
?$paratext>? on page 2.11, respectively.
• A combination of faded or smeared defects may 
indicate that the toner cartridge needs cleaning. See 
?$paratext>? on page 8.6.
• The surface of the LSU part inside the machine may be 
dirty. Clean the LSU (?$paratext>? on page 8.2). 
Contact a service representative.
Toner specs• The paper may not meet specifications; for example, 
the paper is too moist or too rough. See ?$paratext>? 
on page 10.3.
• The transfer roller may be dirty. Clean the inside of 
your machine. See ?$paratext>? on page 8.2.
• The paper path may need cleaning. See ?$paratext>? 
on page 8.6.
DropoutsIf faded areas, generally rounded, occur randomly on the 
page:
• A single sheet of paper may be defective. Try reprinting 
the job.
• The moisture content of the paper is uneven or the 
paper has moist spots on its surface. Try a different 
brand of paper. See ?$paratext>? on page 10.3.
• The paper lot is bad. The manufacturing processes can 
cause some areas to reject toner. Try a different kind or 
brand of paper.
• The toner cartridge may be defective. See 
?$paratext>? on page 9.9.
• If these steps do not correct the problem, contact a 
service representative.
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							Troubleshooting
9.9
Vertical linesIf black vertical streaks appear on the page:
• The drum inside the toner cartridge has probably been 
scratched. Remove the toner cartridge and install a 
new one. See ?$paratext>? on page 8.5.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be 
dirty. Clean the LSU (?$paratext>? on page 8.2). 
Contact a service representative.
Gray 
backgroundIf the amount of background shading becomes 
unacceptable:
• Change to a lighter weight paper. See ?$paratext>? on 
page 10.3.
• Check the machine’s environment: very dry (low 
humidity) or high humidity (higher than 80% RH) 
conditions can increase the amount of background 
shading.
• Remove the old toner cartridge and install a new one. 
See ?$paratext>? on page 8.5.
Toner smear• Clean the inside of the machine. See ?$paratext>? on 
page 8.2.
• Check the paper type and quality. See ?$paratext>? on 
page 10.3.
• Remove the toner cartridge and install a new one. See 
?$paratext>? on page 8.5.
Vertical 
repetitive 
defectsIf marks repeatedly appear on the printed side of the 
page at even intervals:
• The toner cartridge may be damaged. If a repetitive 
mark occurs on the page, print a cleaning sheet several 
times to clean the cartridge; see ?$paratext>? on 
page 8.6. After the printout, if you still have the same 
problems, remove the toner cartridge and install a new 
one. See ?$paratext>? on page 8.5.
• Parts of the machine may have toner on them. If the 
defects occur on the back of the page, the problem will 
likely correct itself after a few more pages.
• The fusing assembly may be damaged. Contact a 
service representative.
• If you use inferior quality paper; see ?$paratext>? on 
page 8.6.
ConditionSuggested solutions
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Background 
scatterBackground scatter results from bits of toner randomly 
distributed on the printed page. 
• The paper may be too damp. Try printing with a 
different batch of paper. Do not open packages of 
paper until necessary so that the paper does not 
absorb too much moisture.
• If background scatter occurs on an envelope, change 
the printing layout to avoid printing over areas that 
have overlapping seams on the reverse side. Printing 
on seams can cause problems.
• If background scatter covers the entire surface area of 
a printed page, adjust the print resolution through your 
software application or the printer properties.
Misformed 
characters• If characters are improperly formed and producing 
hollow images, the paper stock may be too slick. Try a 
different paper. See ?$paratext>? on page 10.3.
• If characters are improperly formed and producing a 
wavy effect, the scanner unit may need service. For 
service, contact a service representative.
Page skew• Ensure that the paper is loaded properly.
• Check the paper type and quality. See ?$paratext>? on 
page 10.3.
• Ensure that the paper or other material is loaded 
correctly and the guides are not too tight or too loose 
against the paper stack.
Curl or wave• Ensure that the paper is loaded properly.
• Check the paper type and quality. Both high 
temperature and humidity can cause paper curl. See 
?$paratext>? on page 10.3.
• Turn over the stack of paper in the tray. Also try 
rotating the paper 180° in the tray.
Wrinkles or 
creases• Ensure that the paper is loaded properly.
• Check the paper type and quality. See ?$paratext>? on 
page 10.3.
• Turn over the stack of paper in the tray. Also try 
rotating the paper 180° in the tray.
ConditionSuggested solutions
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