Pioneer DEH-S4000BT Owner's Manual page 12

Playing back
Disconnect headphones from the device before connecting it to the unit.
CD
1
Insert a disc into the disc loading slot with the label side up.
To eject a disc, stop playback first then press
USB devices (including Android™)/iPhone
1
Open the USB port cover.
2
Plug in the USB device/iPhone using an appropriate cable.
NOTE
To automatically switch to [USB] source when a USB device/iPhone is connected to the unit, set [USB
AUTO] to [ON] in the SYSTEM settings (page 32).
CAUTION
Use an optional Pioneer USB cable (CD-U50E) to connect the USB device as any device connected
directly to the unit will protrude out from the unit, which could be dangerous.
Before removing the device, stop playback.
AOA connections
For details on AOA connection, see page 23.
MTP connection
A device installed with Android OS 4.0 or later can be connected to the unit via MTP, using the cable
supplied with the device. However, depending on the connected device and the numbers of the files in
the device, audio files/songs may not be able to be played back via MTP. Note that MTP connection is
not compatible with WAV and FLAC file formats.
NOTE
If you use an MTP connection, [PHONE CONNECT] needs to be set to [USB MTP] in the SYSTEM settings
(page 32).
AUX
1
Insert the stereo mini plug into the AUX input jack.
2
Press SRC/OFF to select [AUX] as the source.
NOTE
If [AUX] is set to [OFF] in the SYSTEM settings, [AUX] cannot be selected as a source (page 31).
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