OKI B4350n User Manual

							CONSUMABLES AND MAINTENANCE > 71
5. Return the printer on line by pressing the Online button.
GENERATING A CLEANING PAGE
If the printed page shows signs of fading, streaking or erratic marks, the 
problem may be cleared by generating a drum cleaning page as follows.
B4100, B4250
Using the printer Status Monitor
1. Start the Status Monitor for the printer.
2. Click on [Printer Setup] tab - [Printer Menu] button - [Test Print 
tab] - [Cleaning] button.
3. Open the manual feed tray and insert a sheet of letter size plain 
paper between the paper guides, then click the [OK] button.
4. The printer grips the paper and prints a cleaning page.
5. If subsequent printing appears faded or uneven, try replacing the 
toner cartridge.
Using the Control button
1. Press the Control button to take the printer off line.
2. Open the manual feed tray and insert a sheet of letter size plain 
paper between the paper guides.
3. Press and hold down the Control button for at least five seconds.
4. The printer grips the paper and prints a cleaning page.
5. Return the printer on line by pressing the Control button.
6. If subsequent printing appears faded or uneven, try replacing the 
toner cartridge.
B4350, B4350n
1. Press the Online button to return the printer to off-line status.
2. Open the manual feed tray and insert a sheet of letter size plain 
paper between the paper guides.
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							CONSUMABLES AND MAINTENANCE > 72
3. Press the Menu button repeatedly until MAINTENANCE MENU 
is displayed, then press the Select button.
4. Press the Item button until CLEANING PAGE is displayed.
5. Press the Select button.
6. The printer grips the paper and prints a cleaning page.
7. Return the printer on line by pressing the Online button.
8. If subsequent printing appears faded or uneven, try replacing the 
toner cartridge.
CLEANING THE LED ARRAY
Clean the LED array whenever a new toner cartridge is installed or if there 
are faded vertical areas or light printing down a page.
Wipe the LED array gently with the cleaning pad that came with the new 
toner cartridge or use an anti-static cleaning pad that is generally available 
for computer cleaning.
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							TROUBLESHOOTING > 73
TROUBLESHOOTING
STATUS AND ERROR MESSAGES
Your printer has been designed to give you helpful status feedback not 
only during normal operation, but also if a printing problem occurs so that 
you can take appropriate corrective action.
B4100, B4250
Both status and error messages are displayed in your chosen language in 
the Status Monitor, error messages being accompanied by the appropriate 
flashing of the Error indicator. You can set the Status Monitor to pop up 
on your computer screen when an alert condition occurs from the 
Preferences tab in the Status Monitor.
B4350, B4350n
The LCD on the printer operator panel provides the self-explanatory 
status and error messages in your chosen language. The Ready indicator 
goes out when an error message appears.
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							TROUBLESHOOTING > 74
PAPER JAMS
Provided that you follow the recommendations in this guide on use of 
print media, and you keep the media in good condition prior to use, your 
printer should give years of reliable service. However, paper jams 
occasionally do occur, and this section explains how to clear them quickly 
and simply.
Jams can occur due to paper misfeeding from a paper tray or at any point 
on the paper path through the printer. When a jam occurs, the printer 
immediately stops, and the operator panel informs you of the event. If 
printing multiple pages (or copies), do not assume that having cleared an 
obvious sheet that others will not also be stopped somewhere along the 
path. These must also be removed in order to clear the jam fully and 
restore normal operation.
The printer may experience a paper jam in one of three areas. 
> INPUT JAM - paper has failed to leave the selected feed tray and 
enter the internal paper path of the printer. A typical message 
indicates a paper jam and identifies the tray to check.
> FEED JAM - paper has entered the printer but failed to reach the 
exit. A typical message indicates a paper jam and advises you to 
open the top cover for access.
> EXIT JAM - paper has reached the exit but has failed to exit 
completely from the printer. A typical message indicates an exit 
jam and advises you to open the top cover for access.
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							TROUBLESHOOTING > 75
INPUT JAM
1. Remove the paper tray from the printer.
2. Remove any crumpled or folded paper.
3. Remove any paper from the underside of the printer.
4. Replace the paper tray. 
After successful removal of any damaged or misfed paper, the printer 
should continue printing.
FEED JAM OR EXIT JAM
1. Remove the tray and clear any misfed sheets as given above.
2. Open the top cover.
3. Carefully lift out the image drum, complete with the toner 
cartridge. Be careful not to touch or scratch the green drum 
surface.
4. Remove any jammed sheets from the paper path.
5. Re-install the image drum complete with toner cartridge, ensuring 
that it correctly locates into the slots on each side of the printer.
6. Close the top cover and press down to latch it closed.
WARNING!
The fuser area will be hot. This area is clearly marked. Do not touch it.
CAUTION!
Never expose the image drum unit to light for more than 5 minutes. Never 
expose the image drum unit to direct sunlight. Always hold the image drum 
unit by the ends or from the top. Never touch the surface of the green drum 
inside the image drum unit.
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							TROUBLESHOOTING > 76
7. The printer will warm up and commence printing when ready. 
The page lost through the jam will normally be reprinted.
PRINT QUALITY PROBLEMS
Before consulting a service representative regarding a print quality 
problem, check the table below to see if there is a solution, or something 
you might have overlooked.
NOTE
If the edge of the jammed paper protrudes (or can be seen) from the exit, 
reinstall the image drum, close the top cover and switch the printer on. 
Remove the jammed paper from the exit when the exit roller begins rotating 
after a few seconds after switching on. However, if the jammed paper cannot 
be removed, contact a service representative.
SymptomProblemSolution
Blank sheets printed. Image drum cartridge not 
properly installed.Reinstall image drum cartridge.
Empty or missing toner 
cartridge.Install new toner cartridge.
Entire page prints 
faintly.Empty toner cartridge. 
Pages get fainter when 
toner is used up.Install new toner cartridge.
LED array is dirty.Clean LED array.
Page has grey 
background.Static electricity, 
generally from dry 
environments, causes 
toner to stick to 
background.Change paper to a smoother laser bond or 
use a humidifier.
Page prints all black.Hardware problem.Contact service.
Page has repetitive 
marks.Damaged image drum 
cartridge causes 
repetitive marks every 
1.6 inches (4.06 cm) due 
to surface nicks and 
scratches.Generate a cleaning page, repetitive marks 
may be temporary.
Oblong area of faint 
print appears on each 
page.Drop out caused by using 
paper exposed to high 
humidity.Change paper stocks, check paper storage 
environment or use a dehumidifier; check 
toner level.
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							TROUBLESHOOTING > 77
SOFTWARE PROBLEMS
Your software (operating environment, applications and printer drivers) 
controls the printing process. Make sure you have selected the right driver 
Vertical white 
streaking or faint 
areas on page.Toner is low and does not 
distribute properly, or the 
drum is worn out.Replace toner cartridge. Check drum and 
replace the drum, if necessary. Contact 
service.
LED array is dirty.Clean LED array.
Vertical black lines. Hardware problem. Contact service.
Fuzzy print.LED array is dirty.Clean LED array.
Distorted print. Paper path, lamp 
assembly, or fusing unit 
problem.Generate cleaning page.
Contact service.
Faded print.Toner cartridge is not 
correctly installed.
To n e r  l o w.Install toner cartridge correctly.
Replace toner cartridge.
Smeared or blotched 
print.Dirty rollers; toner 
dropped inside printer or 
image drum problem.Replace image drum and toner.
Contact service.
Printed page is light/
blurred.Is toner low?Replace toner cartridge.
Is paper meant for laser 
printers?Use recommended paper.
LED array is dirty.Clean LED array.
Bold characters and 
dark lines are 
smeared.Toner is low. Install new toner cartridge.
Print is darker than 
usual.Darkness setting is too 
high.Change darkness setting.
Pages curl 
excessively.Printing on wrong side of 
paper.Turn paper over in tray. (Note arrow on 
paper package). Install paper print side 
down in tray.
Moisture in paper. 
Improper storage.Avoid storing paper in areas of excessive 
temperature and humidity. Store paper in 
protective wrapping.
High humidity. Recommended operating humidity: 20-80%
SymptomProblemSolution
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							TROUBLESHOOTING > 78
for use with your printer. See your software documentation for more 
information.
HARDWARE PROBLEMS
SymptomProblemSolution
Printing is garbled. Incorrect driver is 
installed.Install an appropriate driver.
Printer’s output is 
below rated speed.Much of the printing 
delays will be caused by 
your application. 
Sometimes purely text 
documents will print 
slowly depending on the 
selected fonts and how 
they are transferred to the 
printer.For maximum speed, use text in your 
document and use a printer resident font.
Size of top margin 
increases with each 
page printed.Creeping text. Number of 
lines per page in software 
is not equal to number of 
lines per page of printer.Many software packages assume 66 lines 
per page, but your printer’s default is 64. 
Adjust software accordingly, or set LINES 
Per PAGE in the soft control panel to equal 
lines per page in your software.
SymptomProblemSolution
Graphic image prints 
partly on one page, 
partly on the next.Insufficient printer 
memory for this image at 
this resolution.Change the resolution, reduce the image 
size, or install more memory in your printer.
When you try to print 
nothing happens, but 
printer indicates it is 
ready to receive data.Configuration error.Check cable connection. If more than one 
printer is available, make sure your printer 
has been selected.
Garbage prints. Incorrect cable 
configuration. Also, see 
Software Problems.Check cable configuration, continuity, and 
length.
Printer freezes or 
displays error 
message when 
computer is rebooted.Booting the computer 
while the printer is on 
can cause a 
communications error.Turn printer off before rebooting computer.
Odors. Gases are given off by 
forms or adhesives 
passing through the hot 
fusing unit.Make sure the forms you use can withstand 
heating, and provide adequate ventilation.
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							TROUBLESHOOTING > 79
Printer is on but must 
warm up before a job 
is printed.Power Save mode is set 
on to conserve energy. 
The fuser must heat up 
before you can begin 
printing the next job.To eliminate warm up delay, change Power 
Save setting
SymptomProblemSolution
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							INSTALLING OPTIONS > 80
INSTALLING OPTIONS
The following options are available for the B4250, B4350, and B4350n 
only, to extend the performance of these printer models:
> 10/100 BASE-TX Network Interface Card: to make the B4350 
network compatible
> 16MB, 32MB, 128MB, 256MB  RAM DIMM: to extend the main 
memory of your printer and speed up the processing of large files
> RS232 Board: to provide serial interface capability.  (Note: 
cannot be used with the Network Interface card.
> Second paper tray: to increase your printer’s paper handling 
capacity by 500 sheets
> PostScript  3 emulation DIMM: to add PostScript emulation to the 
B4350 and B4350n. 
INSTALLATION PROCEDURE
To install any of the above options, follow the detailed installation sheet 
that accompanies the option.
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