Toshiba e-STUDIO556 Service Manual page 954

11.8.2 Flow chart for correcting USB update failure
[A] When the update of the System ROM (OS data) failed
USB update failed
Failed twice or more?
Update download jig. (System ROM)
" 11.2.1 Master data / System ROM /
Laser ROM / PFC ROM / Engine ROM /
Scanner ROM / RADF ROM "
Update succeeded?
Check ROM version.
"11.6 Confirmation of the
updated data "
Is ROM version correct?
Update completed
e-STUDIO556/656/756/856/557/657/757/857
FIRMWARE UPDATING
NO
YES
NO
YES
NO
YES
11 - 64
Update USB.
Failed twice or more?
YES
Replace SYS board.
Update USB.
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NO