Canon DR-G1130 ユーザーズマニュアル

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Chapter 5   Maintenance
4.
Change the [Reduction ratio adjustment] values. 
The adjustment value can be set in the range -3.0% to 
+3.0%. 
5.
Click [OK] to close the scanner properties. 
Auto Power OFF Function 
An auto power OFF function is built into the device. When the 
auto power OFF function is ON, the power supply 
automatically turns OFF after four hours have elapsed without 
a scan or other operation with the scanner.
The auto power OFF function can be set using user mode. 
Power Outlet
If you leave the power plug connected to the power outlet for 
a long period of time, dust may accumulate at the power 
outlet, and cause a fire or electrical shock. Clean the power 
plug and power outlet regularly.