Denon AVR-S510BT Service Manual page 45

5.2. A connected USB device is not recognized.
Is a USB hub being used?
Is the USB device supported by this unit?
Are BN912 and BN914 of the USB PCB correctly connected?
Can a voltage (5V) be confirmed between pin 1 and pin 4 of JK91 (USB
Connector) on USB PCB?
The circuit between IC901 and JK91 of the USB PCB are faulty.
Check the USB device being used
NO
YES
Checking the unit
YES
YES
YES
Do not use a USB hub.
This unit supports devices in the FAT16 and
NO
FAT32-formatted mass storage class, MTP-
compatible devices and iPods (with the
exception of some models).
NO
Connect the connectors correctly.
NO
IC905 around circuit of the DIGITAL PCB is
faulty.
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