Sony STR-DH770 Manual page 7

The RDS information that you want does not appear (for European and Asia-
Pacific models only). [161]
iPhone/iPod
The sound is distorted. [162]
USB devices
Are you using a compatible USB device? [163]
There is noise, skipping, or distorted sound. [164]
A USB device is not recognized. [165]
Playback does not start. [166]
A USB device cannot be connected to the USB port. [167]
Erroneous display. [168]
[READING] is displayed for an extended time, or it takes a long time before
playback starts. [169]
An audio file cannot be played. [170]
BLUETOOTH device
Pairing cannot be done. [171]
Cannot make a BLUETOOTH connection. [172]
The sound skips or fluctuates, or the connection is lost. [173]
The sound of your BLUETOOTH device cannot be heard on the receiver. [174]
Severe humming or noise. [175]
SongPal application is closed. [176]
"BRAVIA" Sync (Control for HDMI)
The Control for HDMI function does not work properly. [177]
TV sound cannot be heard from the speakers connected to the receiver. [178]
Remote control
The remote control does not function. [179]
If the problem is not solved
Reverting to the factory default settings [180]
Resetting sound fields to the default settings [181]
Customer support websites [182]
Other Information
Trademarks
Trademarks [183]
[1] Parts and Controls Receiver
Front panel (upper section)