Srnubi T20 Android Car Radio User Manual

Introduction

This manual provides essential information for the installation, operation, and maintenance of your Srnubi T20 Android Car Radio. Designed for select BMW E46 models, this unit features an advanced UIS7865 Octa-Core processor, Android 14, Wireless CarPlay & Android Auto, and a range of multimedia and navigation capabilities. Please read this manual thoroughly before installation and use to ensure optimal performance and safety.

Vehicle Compatibility & Important Notes

This unit is specifically designed for the following vehicle models:

• MG ZT (2001-2005)
• Rover 75 (1999-2005)
• BMW E46 M3 (2000-2006)
• BMW E46 4-door Sedan (1998-2005)
• BMW E46 2-door Coupe (1999-2006)
• BMW E46 2-door Convertible (1999-2006)
• BMW E46 5-door Touring (1999-2005)
• BMW E46 3-door Hatchback (2000-2004)

Critical Compatibility Warnings:

• Amplifier in Trunk: If your car has an amplifier in the trunk, there will be no sound from your speakers after installation. This unit is not compatible with such setups without significant modification.
• Digital Sound Systems: If your original car has a DSP (Digital Sound Processing) button, or a "BOSE" or "Harman Kardon" digital sound system, you will need to modify the speaker wiring. Professional installation is highly recommended in these cases.
• Cable Plugs: If your car has blue and white cable plugs, our product is suitable, but extreme care must be taken during installation to avoid damaging the interface.

Android Auto Wireless Connection:

Some Android phone models (especially certain Samsung, Huawei, Xiaomi, and Oppo) may experience connection issues with wireless Android Auto. If you heavily rely on this function, please confirm your phone model's compatibility with our customer service before purchase.

Setup & Installation

Package Contents:

Before beginning installation, please verify that all components are present:

• Main Unit (Car Radio)
• Frame (for BMW E46)
• Power Cable
• RCA Cable
• USB Cable * 2
• GPS Antenna
• 4G RCA Cable (Only for 4G Function)
• Installation Tool (Gift)
• Camera Input Cable
• Manual (General Guide)

General Installation Guidelines:

1. Use Provided Cables: Always use the power cables supplied with the unit. Do not attempt to plug original car plugs directly into the new unit without using the provided adapter harness.
2. Power Connection Test: If the unit does not power on, perform a quick test: connect the red (ACC) and yellow (B+ Constant) wires to a 12V positive source, and the black (GND) wire to a negative source.
3. Check Fuse: Inspect the car radio fuse. If blown, replace it with a fuse of the correct rating.
4. Internal Connections: If comfortable, carefully open the back cover of the unit to ensure all internal connectors are securely seated.
5. Professional Installation: Due to the complexity of car electrical systems and specific vehicle requirements, professional installation is highly recommended.

Operating Instructions

System Overview:

Your Srnubi T20 unit runs on the latest Android 14 operating system, powered by a high-performance UIS7865 Octa-Core 2.2GHz processor. This combination ensures a stable, fast, and feature-rich user experience.

Audio Features:

Experience superior sound quality with integrated DSP (Digital Signal Processing), a customizable EQ (Equalizer), and RDS (Radio Data System). The reliable TDA7851 amplifier ensures clear and powerful audio output.

FM & AM Radio: Tune into your favorite stations with the built-in FM/AM radio tuner. Ensure your car's antenna is properly connected for optimal reception.

Display & User Interface:

The unit features a vibrant QLED 1280*720P display, offering sharper and brighter visuals. Customize your experience with various UI options:

• Custom Car Model UI: Personalize your home screen with a digital avatar of your exact car model, color, rims, and license plate number.
• Multiple Free UI Themes: Change the look and feel of your interface with various free themes.
• Adjustable Button Color: Customize the color of the unit's physical buttons to match your car's interior lighting or personal preference.
• Split Screen Display: Run two applications simultaneously, such as navigation and music, or a video and ADAS DVR feed.

Connectivity & Navigation:

• Wireless CarPlay & Android Auto: Seamlessly integrate your smartphone for navigation, music, calls, and more.
• Bluetooth 5.4: Enjoy stable and fast wireless connections for hands-free calls, contact synchronization, call records, and music streaming with AI Voice Noise Reduction.
• 5GHz Wi-Fi & 4G Network: Connect to the internet via Wi-Fi or insert a 4G SIM card (for T20 series) for online services, streaming, and real-time traffic updates.
• Free Map Navigation: Utilize built-in GPS with support for various navigation applications.

Safety & Convenience Features:

• Streaming Camera (Rear View): Automatically switches to reverse screen with parking lines when reversing.
• ADAS DVR: Connect a USB DVR for Advanced Driver-Assistance System features like LDWS (Lane Departure Warning System) and FCWS (Forward Collision Warning System).
• TPMS (Tire Pressure Monitoring System): Displays real-time pressure and temperature of all four tires (requires optional TPMS sensors).
• Steering Wheel Controls: Control media playback, volume, and answer calls directly from your car's steering wheel buttons.

Maintenance

To ensure the longevity and optimal performance of your Srnubi T20 car radio, follow these general maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the screen and exterior. Avoid abrasive cleaners or solvents that could damage the display or finish.
• Software Updates: Periodically check for and install available software updates to ensure you have the latest features, performance improvements, and security patches.
• Heat Management: The T20 series includes an upgraded automotive-grade cooling fan to prevent overheating. Ensure the fan vents are not obstructed to allow for proper airflow.

Troubleshooting

This section addresses common issues you might encounter. For persistent problems, please contact customer support.

A. Installation & Setup Related Issues

Q: The unit does not turn on after installation.

A:

• Ensure you are using the provided power cables. Do not plug original car plugs directly into the unit.
• Perform a quick power test: Connect the red (ACC) and yellow (B+ Constant) wires to a 12V positive source, and the black (GND) wire to negative.
• Inspect and replace the car radio fuse if needed.
• If confident, open the back cover to ensure internal connectors are secure.
• If problems persist, contact customer service with a video showing your wiring and a 12V multimeter reading.

Q: Cannot search for FM/AM radio stations.

A:

• Ensure the car’s radio antenna is firmly plugged into the unit’s antenna port.
• Your current location may have poor signal; try searching in a different area.
• The car’s original antenna might be faulty.

Q: What are the default passwords for settings menus?

A: Passwords vary by model. Common ones include: 1234, 123456, 000000, 8888, 888888, 111333, 7890, 1617, 16176699.

For developer password: 7890 or 7890 plus the current hour (e.g., at 11 o'clock it is 789011, at 12 o'clock it is 789012).

B. Features & Function Usage Issues

Q: It shows “No Signal” when I put the car in reverse.

A: This indicates a lost rear camera signal. Ensure the camera’s video cable is firmly connected to the port labeled “CAM IN” or “REAR CAM” on the back of the unit.

Q: A warning pops up when I watch USB videos.

A: For safety, a default warning appears. You can disable it by going to Settings > Safety (or Video Settings) and turning off the “Video Warning” function.

Q: Cannot connect to Bluetooth or the signal is weak.

A:

• For Connection: On your phone, search for the device (e.g., “T20-CarBT”). Pairing codes are usually 0000, 1234, or 123456.
• For Weak Signal: Check the back of the unit. The two short cables on the yellow rear camera connector are Bluetooth/WiFi antenna extensions. Ensure they are properly connected and not hidden behind metal components to avoid weak signals.

Q: The navigation (GPS) is not working.

A:

• Check the GPS signal status in the built-in “GPS Info” app.
• If there is no signal, place the GPS antenna outside the metal dashboard (e.g., on the windshield) for a clear sky view.
• If there is a signal but the map app fails, try reinstalling the app or using online navigation via mobile hotspot.

Q: The screen has lines, is frozen, or displays abnormally.

A:

• First, try a “Factory Reset” or “Recovery” option in the settings menu.
• If unresolved, power off the unit and check the wide flat screen cable (LVDS cable) on the back to ensure it is securely seated. Reconnecting it often resolves the issue.

Q: There is abnormal sound or no sound at all.

A:

• First, check all audio settings (Balance, Fader) to ensure they are centered and no mute function is active.
• Verify your car’s speaker wires are correctly connected and have not been previously modified by others.

Specifications

The Srnubi T20 series offers various configurations. Below are the general specifications and a comparison table for different models.

Model Comparison:

User Tips

• Pre-Order Compatibility Check: Always provide your car's brand, model, year, and a photo of your dashboard to customer service to ensure you order the correct unit.
• Optional Accessories: If you need specific accessories like a microphone, rearview camera, or USB DVR, confirm they are included in your chosen model's configuration.
• GPS Antenna Placement: For optimal GPS signal, ensure the GPS antenna is placed outside any metal obstructions, ideally on the windshield with a clear view of the sky.
• Bluetooth/WiFi Antenna: The short cables on the yellow rear camera connector serve as Bluetooth/WiFi antenna extensions. Ensure they are properly connected and not hidden behind metal components to avoid weak signals.
• Software Updates: Regularly check for and install software updates to benefit from new features and performance enhancements.

Warranty & Support

Warranty Information:

Your Srnubi T20 Car Radio comes with a 365-day warranty from the date of purchase, covering manufacturing defects and malfunctions under normal use.

Warranty Extension: You can extend your standard warranty to 24 months by leaving a 5-star review with authentic photos/videos of the product. Please contact our customer service after your review is published to claim your extended warranty.

Technical Support:

For any technical issues, questions, or assistance, the fastest way to get support is to contact our customer service team directly through your order page. Please provide a detailed description of your issue, along with photos or a video if possible, to help us diagnose and resolve the problem efficiently. We aim to respond to all inquiries within 24 hours.

Important Reminder: For any issues, please contact us first before leaving negative feedback. We are committed to solving every problem and providing you with satisfactory support.