Canon iR4570 User Manual page 48

If login authentication by the SDL or SSO
login service is set:
The Start Up screen is displayed until the machine is
ready to scan.
1
After the Start Up screen disappears, the MEAP
Start Up screen is displayed regardless of the Initial
Function settings. (The background colour of the
screen is changed to brown.)
IMPORTANT
If you turn OFF the main power, wait at least 10 seconds
before turning the main power back ON.
Do not turn the main power OFF if the Universal Send Kit
is activated, or the optional Super G3 FAX Board is
attached, and you want to be able to send or receive I-fax
or fax documents. Sending or receiving I-fax or fax
documents cannot be done when the power is turned
OFF.
If SSO or SDL is set as the login service, the machine will take longer to become ready to scan.
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Main Power and Control Panel Power