Denon AVR-X3000 Service Manual page 95

5.2. USB device is not recognized
Are you using a USB hub?
Is the USB device compatible with the set?
Is the wire properly connected between CN321 on the DIGITAL B'D
and BN321 on the USB board.
Is a voltage (5V) being supplied between pins 1 and 4 of JK608 on
the USB board (USB connector)?
The circuitry from IC390 on the DIGITAL B'D to JK608 on the USB
board is defective.
5.3. No picture or sound is output
Are video signals output at test points (BCLK,VD7-VD0)?
Check the HDMI circuit.
Checking the set (AV RECEIVER):(If no sound is output from MAIN ZONE)
Are S/PDIF signals output to IC403 pin 31?
Check the Digital audio circuit.
Checking the USB device
NO
YES
Checking the set (AV RECEIVER)
YES
YES
Checking the set (AV RECEIVER):(If no sound is output)
YES
YES
YES
Don't use the USB hub.
Only mass storage devices in FAT16 or
NO
FAT32 formats or MTPcompatible devices
and iPod (Remove some models) are
supported.
NO
Connect the wire properly.
NO
The IC320 and surrounding circuitry on the
DIGITAL B'D is defective.
The circuit between IC390 and IC151 is
NO
defective.
NO
IC390 and surrounding circuitry is defective.
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