B
Bradley PetersSep 9, 2025
Why can't I select 'AM' on my JVC KD-R421?
- DDeborah AshleySep 9, 2025
If your JVC Car Receiver displays “AM” cannot be selected, check the = setting.
To Next PageTo Next PageWhy can't I select 'AM' on my JVC KD-R421?
If your JVC Car Receiver displays “AM” cannot be selected, check the = setting.
Why can't I select 'F-AUX' or 'R-AUX' on my JVC KD-R421?
If your JVC Car Receiver displays “F-AUX” or “R-AUX” cannot be selected, check the = setting.
How to fix JVC Car Receiver when disc cannot be played?
If your JVC Car Receiver cannot play a disc, insert the disc correctly.
How to fix JVC Car Receiver when no sound is coming from the speakers?
If you cannot hear sound from the speakers of your JVC Car Receiver, first adjust the volume to the appropriate level. Also, ensure that the unit is not muted or paused. Finally, check the cords and connections to make sure they are properly connected.
How to stop noise during USB playback on my JVC KD-R421 Car Receiver?
If noise is generated during USB playback on your JVC Car Receiver, skip to another file.
What to do if JVC KD-R421 Car Receiver shows 'NOT SUPPORT' during USB playback?
If your JVC Car Receiver displays “NOT SUPPORT” and track skips during USB playback, check whether the track is a playable file format.
Why aren't my USB tracks playing in the correct order on my JVC KD-R421 Car Receiver?
If tracks do not play in your intended order on your JVC Car Receiver during USB playback, note that the playback order is determined by the file name; folders with numbers at the beginning are sorted numerically, and folders without numbers are sorted according to the file system of the USB device.
What does 'NO FILE' mean on my JVC Car Receiver during USB playback?
If your JVC Car Receiver displays “NO FILE” during USB playback, check whether the device contains playable files.
How to stop noise during iPod/iPhone playback on JVC KD-R421?
If noise is generated during iPod/iPhone playback on your JVC Car Receiver, turn off (uncheck) the “VoiceOver” feature of the iPod.
How to fix distorted sound on JVC Car Receiver during iPod/iPhone playback?
If you are experiencing distorted sound on your JVC Car Receiver during iPod/iPhone playback, deactivate the equalizer either on the car receiver or the iPod/iPhone.
General| MP3 playback | Yes |
|---|---|
| Tuner type | HS-IV |
| FM band range | 87.5 - 108 MHz |
| Audio output channels | 4.0 channels |
| Equalizer bands quantity | 3 |
| Maximum power per channel | 50 W |
Weight and Dimensions| Weight | 121 g |
|---|
Explains the operation of buttons like /SOURCE, Control dial, EQ, and DISP.
How to connect a USB device and start playback.
Important warnings regarding USB device usage, data backup, and potential connection issues.
How to connect an iPod/iPhone and important usage warnings.
Guide to navigating the unit's menu for various settings like DEMO, CLOCK, DIMMER.
Detailed settings for audio equalization, speaker balance, loudness, and volume adjustment.
Explanation of what each button on the remote controller does.
Solutions for common issues like no sound, unit failure, or radio static.
Solutions for disc playback errors and problems with MP3/WMA files.
Solutions for issues encountered with USB and iPod/iPhone playback.
Steps to register a Bluetooth device and configure the unit's source selection.
Technical details for the audio amplifier, tuner, and CD player sections.
Technical details for USB compatibility, operating requirements, dimensions, and mass.
