Ricoh DD 4450 Service Manual page 171

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The approximate downloading time is 10 minutes.
The number of " " signs [D] increases during the downloading.
If the downloading did not finish correctly, an error message will be shown on the
operation panel.
If an error occurred during the download, do the download again when the display
panel shows the SP mode screen. If this is not possible, the ACU board (Printer
controller board) must be replaced.
7.
Turn off the main switch after the operation panel changes from "Executing" to "Completed".
8.
Take out the SD card if you finished downloading.
9.
After downloading the firmware, turn on the main power and enter SP mode to confirm that
the download is complete.
Do not insert or extract the SD card when the machine power is on.
Do not shut off the power when the firmware is downloading.
SM
6-7
Firmware Update
C279

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