Toshiba e-studio600 Service Manual page 504

When the [System ROM]-[System Firmware
Update] has been updated, "SysFirm
Update...Completed" is displayed.
When the [Scanner ROM] has been updated,
"Scanner Firm Update..Flash Update" is
changed to "Scanner Firm Update..Completed".
When the [Laser ROM] has been updated,
"LSR Firm Update...Completed" is displayed
and the [PFC ROM] update will start.
When the [PFC ROM] has been updated, "PFC
Firm Update...Completed" is displayed and the
[Engine ROM] update will start.
e-STUDIO520/600/720/850 FIRMWARE UPDATING March 2005 © TOSHIBA TEC
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05/05