How to fix sound quality changes on JVC Receiver HD Radio?
- TTammy FloresSep 6, 2025
If the sound quality changes when receiving HD Radio stations on your JVC Receiver, fix the reception mode either to or .

How to fix sound quality changes on JVC Receiver HD Radio?
If the sound quality changes when receiving HD Radio stations on your JVC Receiver, fix the reception mode either to or .
How to fix 'Reset08' error on JVC Receiver?
If 'Reset08' appears on the screen of your JVC Receiver, reconnect this unit and the Satellite radio correctly and reset the unit.
Why JVC Receiver displays 'Loading'?
If 'LOADING' appears on the screen while listening to XM Satellite radio on your JVC Receiver, the unit is loading the channel information and audio. Text information is temporarily unavailable.
Why JVC Receiver displays 'Off Air'?
If 'OFF AIR' appears on the screen while listening to XM Satellite radio on your JVC Receiver, the selected channel is not broadcasting at this time. Select another channel or continue listening to the previous channel.
How to fix JVC KW-AVX640 Car Receiver when no sound comes out of speakers?
If no sound is coming from the speakers of your JVC Car Receiver, first, make sure that the volume is at an audible level. If the volume is okay, check the cords and connections to ensure everything is properly connected.
Why JVC Receiver shows no information on the screen?
If no information appears on the screen of your JVC Receiver, there is no text information for the selected channel.
Why JVC Receiver displays 'CH---' or 'Channel Unavl'?
If 'CH–––' or 'CHANNEL UNAVL' appears on the screen for about 2 seconds on your JVC Receiver, the selected channel is no longer available or is unauthorized. Select another channel or continue listening to the previous channel.
Why JVC Receiver shows invalid channel?
If 'Invalid channel' appears on the screen for about 5 seconds on your JVC Receiver, there is no broadcast on the selected channel. Select another channel or continue listening to the previous channel.
How to fix 'No Antenna' or 'Check Antenna' error on JVC Receiver?
If 'No Antenna' or 'CHECK ANTENNA' appears on the screen of your JVC Receiver, check your satellite radio antenna connection and be sure it is firmly attached.
How to fix 'Acquiring Signal' or 'No Signal' on JVC Receiver?
If 'Acquiring Signal' or 'NO SIGNAL' appears on the screen of your JVC Receiver:* Ensure your Satellite Radio antenna is mounted outside the vehicle.* Move the vehicle to an area with a clear view of the sky.
| Brand | JVC |
|---|---|
| Model | KW-AVX640 |
| Category | Car Receiver |
| Language | English |
Important safety warnings and precautions regarding Class 1 Laser Product operation.
Critical warnings about installation, operation, and driving safety to prevent accidents.
Cautions for monitor use, touch panel, temperature, and unit resets/ejection.
Instructions for resetting the unit and forcibly ejecting a disc.
Instructions for detaching and attaching the monitor panel.
Identifies unit components and guides through initial setup and clock configuration.
Explains basic functions, touch screen use, and switching between screens.
How to select sources, tune radio, use presets, and manage reception.
Covers disc types, playback, USB, iPod/iPhone connectivity and playback controls.
Guides for connecting external devices, navigation, and operating satellite/HD Radio.
Customizing audio settings, equalizer, display design, and video picture quality.
General advice, device information, and steps for connecting new Bluetooth devices.
Guides for using Bluetooth for calls, messages, audio playback, and managing settings.
How to connect/disconnect registered devices and delete paired devices.
Specific Bluetooth connection and operation details for the KW-AVX640 model.
Instructions for installing batteries and operating the unit with the remote controller.
Advanced disc operations and methods for directly searching for items using unit controls.
Critical safety warnings and essential steps for safe installation and electrical connections.
Detailed procedures for installing and removing the unit from the dashboard.
Guides for connecting parking brake, reverse camera, steering wheel remote, and external devices.
Common problems and their solutions for the unit and connected components.
Forms for registering the product and submitting warranty control information.
Specific warranty terms and conditions applicable only to products sold in the USA.
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