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 format or MTPcompatible devices
and iPod (Remove some models) are
supported.
Don't use the USB hub.
NO
YES
NO
Checking the set (NR1504)
YES
YES
Is a voltage (5V) supplied between the pins 1 and 4 of CN4401 on the
USB board (USB connector)?
The circuitry from U2602 on the HDMI board to CN4401 on the USB
board is defective.
Is the wire properly connected between N2801 on the HDMI board
and CN4401 on the USB board.
The U2806 and surrounding circuitry on the
HDMI board are defective.
Connect the wire properly.
NO
NO
5.2. USB device is not recognized
U2602 and surrounding circuitry are defective.
Checking the set (NR1504):(If no picture is output)
Check the HDMI/DVI circuit.
Are digital video signals(BCLK, VD0 - VD7) output from U2602 to
IC1600?
NO
Checking the set (NR1504):(If no sound is output)
YES
YES
Check the Digital audio circuit.
Are S/PDIF signals output to U2203 pin 31?
U2602 and surrounding circuitry is defective.
NO
5.3. No picture or no sound is output
85
