Canon iR C6800 Series Service Manual page 1309

Normal Mode(Download mode B)
(With pressing 1+7, turn on the main power switch and select service mode: COPIER> FUNCTION> SYSTEM>
DOWNLOAD.)
Safe Mode(Download mode A)
(With pressing 2+8, turn on the main power switch.)
on keypad, 2+8
Safe mode
program
Download mode A
F-16-2
Use safe mode for the following:
after replacing the HDD.
if the system fails to operate normally.
Main power
on keypad, 1+7
switch ON
Boot ROM
Boot program
HDD
SYSTEM program
In service mode
COPIER > FUNCTION >
SYSTEM > DOWNLOAD
normal mode
program
Download mode B
Chapter 16
16-3