Pioneer X-HM51 Operating Instructions Manual page 33

Additional information
Problem
Power is not supplied to the
USB storage device.
When an iPod/iPhone/iPad is connected
Problem
Can't operate the iPod/iPhone/iPad by the remote control.
Can't operate the iPod/iPhone/iPad.
Check
Is AUTH ERROR displayed on the
front panel display? No power is
supplied if the power consumption is
too high.
Remedy
Turn the power off then back on.
Turn the power off, then disconnect and reconnect the USB storage
device.
Press INPUT to switch to the other input, then switch again to the
USB/iPod input.
Remedy
Make sure the iPod/iPhone/iPad is connected correctly (refer to
Connecting your iPod/iPhone/iPad on page 16).
Make sure the iPod/iPhone/iPad is connected correctly (refer to
Connecting your iPod/iPhone/iPad on page 16).
If the iPod/iPhone/iPad is experiencing a hangup, try resetting the
iPod/iPhone/iPad, and reconnect it to the unit.
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