Severe Humming Or Noise - Sony STR-DH770 Manual

heard on the receiver.
Turn up the volume on your BLUETOOTH device first, and then adjust the volume using
+ (or MASTER VOLUME on the receiver).
[175] Troubleshooting BLUETOOTH device

Severe humming or noise.

If there are obstructions between the receiver and your BLUETOOTH device, remove them
or move the receiver and/or device avoid them.
If there is a device that generates electromagnetic radiation, such as a wireless LAN, other
BLUETOOTH device, or a microwave oven nearby, move it away.
Turn down the volume of the connected BLUETOOTH device.
[176] Troubleshooting BLUETOOTH device
SongPal application is closed.
Disconnect the BLUETOOTH connection on your smartphone, then reconnect it to the
receiver again.
[177] Troubleshooting "BRAVIA" Sync (Control for HDMI)
The Control for HDMI function does not work properly.
Check the HDMI connection with the receiver (refer to the supplied Startup Guide).
Enable the Control for HDMI function on the TV. For details, refer to the operating
instructions of the TV.
Wait for a while, and then try again. If you unplug the receiver, it will take a while before the
operation is completed. Wait for 15 seconds or longer, and then try again.
If you unplug the HDMI cable or change the connection, repeat the procedures of "Preparing
to use the "BRAVIA" Sync function."
Make sure your TV is connected to the HDMI TV OUT jack of the receiver.
Press AMP MENU, then set [<HDMI>] - [CTRL HDMI] to [CTRL ON] on the display panel.
When [<HDMI>] - [CTRL HDMI] is set to [CTRL OFF], "BRAVIA" Sync does not work
properly, even if the device is connected to the HDMI IN jack.
Make sure the connected device supports the Control for HDMI function.
Enable the Control for HDMI function on the connected device. For details, refer to the
operating instructions of the connected device.
The types and number of devices that can be controlled by the "BRAVIA" Sync feature are
restricted by the HDMI CEC standard as follows:
Recording devices (Blu-ray Disc recorders, DVD recorders, etc.): up to 3 devices
Playback devices (Blu-ray Disc players, DVD players, etc.): up to 3 devices
Tuner-related devices: up to 4 devices
Audio system (receiver/headphones): up to 1 device (used by this receiver)
[178] Troubleshooting "BRAVIA" Sync (Control for HDMI)