Denon IN-Command AVR-X4000, Service Manual

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Checking the USB device
YES
Is the USB device compatible with the set?
Are you using a USB hub?
Only mass storage devices in FAT16 or
FAT32 formats or MTPcompatible devices
and iPod (Remove some models) are
supported.
Don't use the USB hub.
NO
YES
NO
Checking the set (AV RECEIVER)
YES
YES
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.
Is the wire properly connected between CN321 on the DIGITAL B'D
and BN321 on the USB board.
The IC320 and surrounding circuitry on the
DIGITAL B'D is defective.
Connect the wire properly.
NO
NO
5.2. USB device is not recognized
Checking the set (AV RECEIVER):(If no sound is output)
Checking the set (AV RECEIVER):(If no picture is output from HDMI)
Checking the set (AV RECEIVER):(If no picture is output from CVBS)
YES
YES
YES
Check the Digital audio circuit.
Check the HDMI circuit.
Check the analog video circuit.
Are S/PDIF signals output to IC406 30pin?
Are video signals output at test point BCLK, VD7-VD0?
Are video signals output from IC323 pin 30?
IC390 and surrounding circuitry is defective.
The circuit between IC390 and IC151 is
defective.
The circuit between IC390 and IC323 is
defective.
NO
NO
NO
5.3. No picture or sound is output
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