The JVC KD-R646/ KD-R446/ KD-R445/ KD-R444 user manual explains operation, settings, and troubleshooting for these car audio head units.
This manual provides step‑by‑step instructions for using the JVC KD‑R series head units, covering basic operation, source selection (CD, USB, iPod/iPhone, AUX), audio adjustments, and special functions such as lighting and EQ settings. It also includes safety warnings and preparation steps before installation in a vehicle.
Additional sections describe how to clean the unit, adjust brightness for day/night, configure radio presets, and perform troubleshooting and maintenance. Wiring diagrams and installation notes are provided for proper mounting and connection of power, antenna, and accessory cables.
| Maximum Audio Power | less than 50 W |
|---|---|
| Antenna Current Rating | max 250 mA |
| Auxiliary Power Current Rating | max 200 mA |
| Brightness Step Range | 0‑31 |
Wipe the panel with a dry, soft cloth; do not use liquids or abrasive materials.
Press the SOURCE key repeatedly to cycle through the available sources.