Denon AVR-2313CI Service Manual page 101

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 N2801 on the HDMI board
and CN4402 on the USB board.
Is a voltage (5V) supplied between the pins 1 and 4 of CP4406 on the
USB board (USB connector)?
The circuitry from U2602 on the HDMI board to CP4406 on the USB
board is defective.
5.3. No picture or no sound is output
Are video signals output from U2803 pin 27 (Y) and pin 24 (C)?
Check the analog video circuit.
Are S/PDIF signals output to U2206 pin 21?
Check the Digital audio circuit.
Checking the USB device
NO
YES
Checking the set (AVR-2313)
YES
YES
Checking the set (AVR-2313):(If no picture is output)
YES
Checking the set (AVR-2313):(If no sound is output from MAIN ZONE)
YES
YES
Don't use the USB hub.
Only mass storage devices in FAT16 or
NO
FAT32 format or MTP compatible devices
and iPod (Remove some models) are
supported.
NO
Connect the wire properly.
NO
The U2806 and surrounding circuitry on the
HDMI board are defective.
NO
The circuit between U2602 and U2803 is
defective.
NO
U2602 and surrounding circuitry is defective.
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