Oki B721 User Manual

- 120 -
Machine Issues
4
Troubleshooting
Symptom Cause Remedy
Reference
Page
There is an abnormal
sound.
The printer is tilted. Place the printer on a at surface. –
There is a piece of paper or foreign
object inside the printer.
Check the inside of the printer
and remove any objects.
–
The top cover is open. Close the top cover. –
There is a buzzing
sound.
The printer is printing on the
heavy or narrow paper when the
temperature inside it is high.
This is not a malfunction. You can
proceed with the operation.
–
It takes a while to start
printing.
The printer is warming up from the
sleep mode.
Press the
button, select
[Admin Setup] > [Power
Setup], then [Sleep], then
disable mode.
page 29
The printer may be cleaning the
image drum.
Wait for a while. –
The printer is adjusting the
temperature of the fuser unit.
Wait for a while. –
The printer is processing data from
another interface.
Wait until the process nishes. –
A print job has stopped
in the middle of the
printing process.
As a result of processing print jobs
continuously for a long time, the
inside the printer has become hot.
The printer is cooling off.
Wait for a while.
When the fuser unit becomes
cooler, printing restarts
automatically.
–
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.
Wait for a while.
When the printer becomes cooler,
printing restarts automatically.
–
When the print processing is
overloaded by printing with the
WSD port, a computer may stop
sending.
Retry to send data on a computer.
If the error is not resolved, use
other network port.
–
Memory is insufcient. A printer is short on memory
because print data is too large.
Reduce the print quality with a
printer driver.
Advanced
It takes a long time to
nish printing.
The processing speed of the
computer may be slowing down
the print job.
Use a computer with faster
processing speed.
–
You have selected [Fine/Detail
(1200x1200)] on the [Job
Options] tab of the printer driver.
Select [Normal (600x600)]
on the [Job Options] tab of the
printer driver.
–
The print data is complex. Make the data simpler. –
Quiet Mode is selected.
Press the
button, select
[Menus] > [Print Adjust], then
[Quiet Mode], and then change
the setting.
Advanced
The printer driver is not
correctly displayed on
Mac OS X.
The printer driver may not be
operating correctly.
Uninstall the printer driver then
reinstall it.
Advanced
Paper is curled. Thin paper is used. Set an appropriate paper weight.
Or, press the
button, select
[Menus] > [Print Adjust] then
[High Humid Mode]
Advanced

Oki B721 Specifications

General

Print Technology	LED
Resolution	1200 x 1200 dpi
Processor	533 MHz
Memory	256 MB
Connectivity	USB, Ethernet
Duplex Printing	Standard