Marantz AV7701, Service Manual

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108
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 JK604 on
the FRONT board (USB connector)?
The circuitry from IC390 on the HDMI board to JK604 on the FRONT
board is defective.
Is the wire properly connected between CN321 on the HDMI board
and BN321 on the FRONT board.
The IC320 and surrounding circuitry on the
HDMI board 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)
YES
Check the Digital audio circuit.
Are S/PDIF signals output to IC406 90pin? IC390 and surrounding circuitry is defective.
NO
5.3. No picture or sound is output