Firmware Update
D255/D256/M281/M282 5-4 SM
5.1.3 PROCEDURE
 A SD card is a precision device, so when you handle an SD card, respect the following.
 When the power is switched ON, do not insert or remove a card.
 During installation, do not switch the power OFF.
 Since the card is manufactured to high precision, do not store it in a hot or humid location,
or in direct sunlight.
 Do not bend the card, scratch it, or give it a strong shock.
 Before downloading firmware on an SD card, check whether write-protection of the SD
card is canceled. If write-protection is enabled, an error code (error code 44, etc.) will be
displayed during download, and the download will fail.
 Before updating firmware, remove the network cable from this machine.
 If SC818 is generated during software update, switch the power OFF -> ON, and
complete the update which was interrupted.
 During software update, network cables, remove interface cables, wireless boards, etc.,
(so that they are not accessed during update).
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