Oki B720dn User Manual page 34

SYMPTOM REASON/ACTION
No power. Is the power of the printer switched off? Push the
power switch to the <|> position to switch on the
power.
Is the power cord disconnected or not securely
connected? Switch off the power of the printer and
connect the power cord to the power outlet again.
Then, switch on the power to the printer.
Is the power cord connected to a power outlet with
the correct voltage? Connect the printer exclusively to
a power outlet with a suitable voltage and current
rating.
Cannot print. Is the light of the READY indicator off? If so, the
printer is off-line or in menu setting mode.
Press the ON LINE button to return the printer to its
on-line status.
Is there a message displayed on the control panel?
Follow the message to rectify the problem.
A list of messages and guidance on how to deal with
them is given in the Reference Guide.
When a parallel cable is used for connection, are you
using a computer that supports bi-directional
communication? See instructions on the Parallel Menu
in the Reference Guide.
If the printer has insufficient memory, use one of the
following methods to rectify the problem.
When the printer driver is set to 1200dpi on the
Graphics tab, set it to 600dpi.
Install the additional memory (optional) to increase
the memory.
Reduce the complexity of the print job.
Print job sent Is the interface cable disconnected? Switch off the
but the light of power and check the connection of the interface
the READY cable.
indicator is not
Is the interface configured? Check the port status of
blinking or on.
the interface.
Is the computer environment correctly set up? Check
the computer environment, such as the printer driver.
Light of Is there an error message displayed on the control
ATTENTION panel? Check the displayed message and rectify the
indicator is on. error.
A list of messages and guidance on how to deal with
them is given in the Reference Guide.
Light of An error that you cannot rectify yourself has occurred.
ATTENTION Record the displayed error message or error code,
indicator is switch off the power, pull out the power plug from the
blinking. outlet, and then contact service.
Troubleshooting > 34