Canon iR6570 Series Portable Manual page 315

Use safe mode for the following:
-when you have replaced the HDD.
-when the system fails to start up normally.
The following table shows the functions that may be used in download mode with the SST in use:
Formatting the HDD
Main power
on keypad, 2+8
switch ON
Safe mode
Boot ROM
program
Download mode A
Function
(download mode B)
-
-
on keypad, 1+7
Boot program
HDD
SYSTEM program
In service mode
COPIER > FUNCTION >
SYSTEM > DOWNLOAD
normal mode
program
Download mode B
F-8-2
T-8-2
Download mode
Normal mode
(download mode A)
Entire HDD
BOOTDEV
Safe mode