Toshiba B-SX4T Series Specification page 8

Boot When the boot program is sent to
program the printer by the downloader, the
earlier than printer
V3.0 ERROR" on the LCD and results in
an error.
When the COM is used as the
interface, the downloader shows
"Check Sum Error". (Then, the
printer is forcibly shut down.)
After the printer is restarted, it starts
up in the previous status
Main When the main program is sent to
program the printer by the downloader, the
earlier than printer writes the program, shows
V5.0 "FIRM VER. INVALID" on the LCD,
and results in an error.
When the COM is used as the
interface, the downloader shows
"Erase Error". (Then, the printer is
forcibly shut down.)
After the printer restarted, it starts up
in the
Downloading the main program V5.0
or greater enables a recovery from
the erroneous state
MAIN4-R or greater
shows "MODEL
DOWNLOAD MODE.
- 4 -
Main PC board
MAIN3-R or earlier
Downloaded normally.
TYPE
Downloaded normally.