Oki B721 User Manual page 120

Machine Issues
Symptom
There is an abnormal
sound.
There is a buzzing
sound.
It takes a while to start
printing.
4
A print job has stopped
in the middle of the
printing process.
Memory is insufficient.
It takes a long time to
finish printing.
The printer driver is not
correctly displayed on
Mac OS X.
Paper is curled.
Cause
The printer is tilted.
There is a piece of paper or foreign
object inside the printer.
The top cover is open.
The printer is printing on the
heavy or narrow paper when the
temperature inside it is high.
The printer is warming up from the
sleep mode.
The printer may be cleaning the
image drum.
The printer is adjusting the
temperature of the fuser unit.
The printer is processing data from
another interface.
As a result of processing print jobs
continuously for a long time, the
inside the printer has become hot.
The printer is cooling off.
As a result of processing print jobs
continuously for a long time, the
temperature inside the printer has
become too high. The printer is
cooling off.
When the print processing is
overloaded by printing with the
WSD port, a computer may stop
sending.
A printer is short on memory
because print data is too large.
The processing speed of the
computer may be slowing down
the print job.
You have selected [Fine/Detail
(1200x1200)] on the [Job
Options] tab of the printer driver.
The print data is complex.
Quiet Mode is selected.
The printer driver may not be
operating correctly.
Thin paper is used.
Remedy
Place the printer on a flat surface.
Check the inside of the printer
and remove any objects.
Close the top cover.
This is not a malfunction. You can
proceed with the operation.
Press the button, select
[Admin Setup] > [Power
Setup], then [Sleep], then
disable mode.
Wait for a while.
Wait for a while.
Wait until the process finishes.
Wait for a while.
When the fuser unit becomes
cooler, printing restarts
automatically.
Wait for a while.
When the printer becomes cooler,
printing restarts automatically.
Retry to send data on a computer.
If the error is not resolved, use
other network port.
Reduce the print quality with a
printer driver.
Use a computer with faster
processing speed.
Select [Normal (600x600)]
on the [Job Options] tab of the
printer driver.
Make the data simpler.
Press the button, select
[Menus] > [Print Adjust], then
[Quiet Mode], and then change
the setting.
Uninstall the printer driver then
reinstall it.
Set an appropriate paper weight.
Or, press the
[Menus] > [Print Adjust] then
[High Humid Mode]
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Reference
Page
page 29
Advanced
Advanced
Advanced
Advanced
button, select
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