Oki B4400L User Manual page 19

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The secondary functions of the Online button are activated after
turning the printer off line, then pressing and holding the switch
for four seconds before releasing. The secondary functions are as
follows:
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The other functions of the Online button are activated after
turning the printer off line then pressing and holding the switch
for seven seconds before releasing. The other functions are as
follows:
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Resuming data processing.
Printing the demo and menu pages.
NOTE
Demo and menu pages can also be printed using the printer
Status Monitor.
Printing any data held in the buffer after printing has been
cancelled.
Printing a cleaning page.
NOTE
A cleaning page can also be printed using the printer Status
Monitor.
Resetting the printer and clearing the buffer after printing
has been cancelled.
NOTE
To reset the printer to the default settings of the
manufacturer, the Online button is pressed and held down
while the printer is switched on with the main power switch.
The LED indicators blink when the printer has reset to the
default settings.
B4400, B4400L/B4600, B4600L User's Guide – Operator panels > 19