Ricoh IWB-D1 Field Service Manual page 107

Machine code:y300
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1.
Connect a USB keyboard to the USB terminal of the main part.
2.
Open [Display color pattern] from the service mode.
3.
Change the color pattern using the F1 to F7 keys on the USB keyboard.
4.
Press the ESC key to finish the display color pattern check.
Service mode
105

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