Denon AVR-X3300W Service Manual page 161

2.9. Forced USB All Device Write Mode
2.9.1. Actions
Mode used when this unit cannot be recovered.
Forcibly switches this unit to USB update mode.
2.9.2. Operations
While holding down buttons the "TUNER PRESET CH +" and "STATUS" buttons simultaneously, insert
the AC plug to turn the power on.
USB AllUpdate
USB AllUpdate.
USB AllUpdate..
USB AllUpdate...
2.9.3. The firmware update finishes.
Returns to the normal status after update is completed.
2.10. Update Procedure in the Event of a CY920 Error
1.10.1. Actions
Perform the following update procedure if "CY920 Error" appears in the display when the power is
turned on after replacing the HDMI PCB or the CY920.
2.10.2. Operations
(1) Remove the AC power plug and turn off the power.
(2) Copy the update file to a USB memory device and insert the USB memory device in the USB port.
(3) Insert the AC plug and turn on the power.
(4) The update starts automatically after "CY920 Error" appears in the display.
UpdateFileCheck
(5) The firmware update finishes.
Update Complete
The unit restarts after the update is finished.
(6) After the update, check that "CY920 Error" is no longer displayed, and check the version of the new
firmware.
See "1. Version Display Mode"
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