1. Introduction
Thank you for purchasing the grandnavi RS-20 Retro Car Radio. This 1DIN multimedia player is designed to enhance your in-car audio experience with a blend of classic aesthetics and modern features. It supports FM/AM/RDS radio, optional DAB+ digital radio, Bluetooth 5.1 for hands-free calls and music streaming, MP3 playback via USB, Type-C, and Micro SD, and AUX input. This manual provides detailed instructions for installation, operation, and troubleshooting to ensure optimal performance and enjoyment of your new car radio.
2. Safety Information
- Always operate the device safely and in accordance with traffic laws. Distracted driving is dangerous.
- Ensure proper wiring connections to prevent damage to the unit or vehicle. Incorrect wiring can cause fire or electrical shock.
- Do not expose the unit to moisture or extreme temperatures.
- Refer all servicing to qualified personnel.
3. Package Contents
Please check the package for the following items:
- grandnavi RS-20 Car Radio Unit
- Power Cable
- Remote Control (No battery included)
- Fixed Accessories (Mounting brackets)
- Installation & Operation Manual
- Optional: DAB+ Box (if purchased)
- Optional: External Microphone (if purchased)
4. Product Overview
4.1 Front Panel Controls
4.2 Rear Panel Connections
5. Installation
5.1 Power Connection
Ensure correct power wiring to prevent damage to the unit. Refer to the diagram below:
5.2 DAB Antenna Installation (Optional)
If you have purchased the optional DAB+ receiver, follow these steps for antenna installation:
5.3 External Microphone Installation (Optional)
For enhanced call quality and noise-free voice interaction, connect the external microphone to the dedicated MIC input on the rear panel.
Possible placements for the external microphone:
- Clip directly onto the car's interior vanity mirror.
- Use double-sided tape to install it wherever desired.
6. Operation
6.1 Basic Controls
- Power On/Off: Press the power button (usually the volume knob) to turn the unit on or off.
- Volume Control: Rotate the volume knob to adjust the audio level.
- Radio (FM/AM/RDS): Press the BAND button to switch between FM and AM bands. Use the seek buttons to find stations. RDS provides additional information like station name.
- EQ Settings: Press the EQ button to cycle through preset sound effects (e.g., POP, ROCK, CLASSIC, NATURAL) or access the 28-band fine-tuning options.
- Time Display: The unit can display the current time.
Video 6.1: Product demonstration showing FM/AM/RDS, EQ, Time display, QC3.0 fast charging, USB music playback, Mobile App Control, Remote control, Bluetooth connectivity, and turning off lights.
6.2 Media Playback
The RS-20 supports various media sources:
- USB: Insert a USB drive into the USB 2.0 port for MP3/WMA/AAC/FLAC audio playback.
- Type-C: The Type-C port supports QC3.0 fast charging for compatible devices (5V/1A).
- Micro SD: Insert a Micro SD card for MP3/WMA/AAC/FLAC audio playback.
- AUX Input: Connect external audio devices via the front AUX input.
6.3 Bluetooth Connectivity
The RS-20 features Bluetooth 5.1 for wireless audio and hands-free communication.
- Pairing: Enable Bluetooth on your mobile device and search for "RS-20". Select it to pair.
- Hands-free Calls: Make and receive calls using the internal or external microphone.
- Audio Streaming: Play music from your paired device.
- Voice Assistant: Access voice assistants like Siri or Google Assistant.
- Dual Bluetooth Connection: Supports connecting two Bluetooth devices simultaneously.
6.4 Mobile App Control
Control your RS-20 car radio conveniently via a mobile app available for both iOS and Android devices. The app allows one-click control of volume, playback mode, radio functions, and button lights.
6.5 Button Light Settings
The button lights can be customized to your preference:
- Supported colors: Orange, Red, Green, Blue, Cyan, Purple, White.
- Automatic cycling (AUTO) mode is available.
- One-click to turn off the lights.
7. Maintenance
- Keep the unit clean by wiping it with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Ensure all connections are secure and free from corrosion.
- If a fuse blows, replace it with a fuse of the same rating.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Incorrect wiring; Blown fuse; Loose connection | Check power wiring (Red/Yellow to positive, Black to negative). Replace fuse if blown. Secure all connections. |
| No sound | Volume too low; Mute activated; Incorrect speaker wiring | Increase volume. Deactivate mute. Check speaker connections. |
| Radio reception poor | Antenna not connected or damaged; Weak signal area | Ensure antenna is properly connected. Try a different location. |
| Bluetooth not connecting | Device not in pairing mode; Out of range; Interference | Ensure Bluetooth is enabled on both devices and in pairing mode. Move devices closer. Reduce interference. |
| USB/Micro SD playback issues | Unsupported file format; Corrupted files; Drive/card not properly inserted | Ensure files are MP3/WMA/AAC/FLAC. Reformat drive/card if necessary. Reinsert drive/card firmly. |
9. Specifications
| Feature | Specification |
|---|---|
| Model Name | RS-20 |
| Power Supply | DC 12V |
| LCD Type | VA-LCD |
| Display Size | 2.5" |
| Max Power Output | 60W x 4CH |
| Speaker Impedance | 4 - 8 Ohm |
| Pre-Output | 6CH x 3V |
| EQ | 28 Band / 8 Preset |
| Radio Support | FM, AM, RDS (DAB optional) |
| FM Frequency Range (Europe) | 87.5 ~ 108.0 KHz (50KHz/Step) |
| FM Frequency Range (U.S.A) | 87.5 ~ 107.9 KHz (200 KHz/Step) |
| FM Frequency Range (ASIA) | 87.5 ~ 108.0 KHz (100 KHz/Step) |
| FM Frequency Range (RUSS) | 65.0 ~ 74.0 KHz (30 KHz/Step) |
| FM Presets | 18FM |
| Usable Audio Formats | MP3/WMA/AAC/FLAC |
| USB Port Type | 2.0 |
| USB Charging | 5V/1A (QC3.0 Fast Charging) |
| Frequency Response | 20 Hz - 20 KHz |
| S/N Ratio | 60 dB |
| Bluetooth Version | Bluetooth 5.1 |
| BT Profile Supports | A2DP, AVRCP, HFP |
| Range Of Frequency | 2.4 GHz spectrum |
| APP Control | iOS and Android Phone |
| Remote Control | Support |
| Subwoofer Support | Yes |
| Dual Bluetooth Connection | Support |
| External Microphone | Support |
| Certifications | CE, FCC |
| Product Dimensions (W x H x D) | 185mm x 56mm x 90mm (approx.) |
| DAB+ Box Dimensions (L x W x H) | 60mm x 28mm x 13mm (approx.) |
| 3M Amplified Antenna Dimensions (L x W x H) | 163mm x 46mm x 26mm (approx.) |
10. User Tips / FAQ
- Button Light Customization: The button lights are adjustable beyond the presets. Use the mobile app for full color control and to select from Orange, Red, Green, Blue, Cyan, Purple, White, or the automatic cycling (AUTO) mode.
- USB Audio Playback: If USB audio mode is not working, ensure your USB drive is formatted correctly and contains supported audio files (MP3/WMA/AAC/FLAC). Try reinserting the drive.
- DAB+ Signal: Before purchasing the optional DAB+ box, confirm that your country/area has good DAB+ signal coverage. The DAB+ box is only compatible with MP3 players with USB ports and is not suitable for Android car radios.
- Automatic Antenna: The unit supports standard car wiring. Refer to the wiring diagram (Figure 4.2) for connections. There is an Amplifier Control wire (A4) which might be used for an automatic antenna, but specific functionality depends on your vehicle's wiring.
- Cassette Player: This unit is an MP3 multimedia player and does not include a cassette player.
11. Warranty and Support
For warranty information and technical support, please refer to the contact details provided by your retailer or visit the official grandnavi website. Keep your purchase receipt as proof of purchase.
