Toshiba e-STUDIO2820C Service Handbook page 430

[D] Display during the update
Update is performed in parallel as shown in the transition diagram below.
[ System ROM ]
1. OS Update
Below is an example of the changes of the LCD screen during update.
System ROM
e-STUDIO2820C/2830C/3520C/3530C/4520C
FIRMWARE UPDATING
Item Selection Screen for Update
[ Master data ]
2. HDD SYS Update
Update Completed
Fig. 8-3
Fig. 8-4
8 - 12
[ Engine ROM ]
3. Engine Main
Firmware Update
Firmware Update
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[ Scanner ROM ]
4. Scanner