Srnubi T20 Android 14 Car Multimedia Player User Manual

1. Product Overview

The Srnubi T20 Series Car Multimedia Player is an advanced in-car entertainment and navigation system designed for Volkswagen VW Golf 7 models from 2013-2017. Powered by the UIS7865 8-Core 2.2GHz chipset and running on Android 14, it offers a smooth and intuitive user experience. Key features include wireless CarPlay and Android Auto, a QLED 1280x720P display, Bluetooth 5.4, 4G network support, DSP+EQ+RDS audio processing, and various customization options. This device is built for performance and ease of use, ensuring a premium and user-friendly experience.

2. Package Contents

Before installation, please verify that all items are present in your package:

Image: Package contents including the main unit, frame, power cable, RCA cable, USB cables, GPS antenna, 4G RCA cable (for 4G function), installation tool, camera input cable, and manual.

• Main Machine Unit
• Installation Frame (Black, suitable for left-hand drive cars)
• Power Cable
• RCA Cable
• USB Cable * 2
• GPS Antenna
• 4G RCA Cable (Only for 4G Function)
• Installation Tool (Gift)
• Camera Input Cable
• User Manual

3. Setup and Installation

3.1 Pre-installation Checks

• Vehicle Compatibility: This unit is designed for Volkswagen VW Golf 7 (2013-2017). Ensure your vehicle matches this specification. If unsure, contact customer service with your car's brand, model, year, and a photo of the dashboard frame.
• Dashboard Frame: The default frame sent is black and suitable for left-hand drive cars.


Image: Example of the black frame for left-hand drive vehicles.

• Power Cord: The power cord is plug-and-play. Not all original plugs need connection as long as the radio and original car functions work normally.
• CANBUS Box: CANBUS boxes are not included for all models. Check your package list or consult customer service if your vehicle requires one.
• Optional Accessories: Microphones, cameras, and USB DVRs are optional. Confirm your order includes these accessories if desired.
• CD Player Note: If your car's storage box has a CD player, you will need a long cable for proper connection.


Image: Important note regarding CD player compatibility and the need for an extended cable.

3.2 Wiring Connections

Refer to the following diagrams for proper wiring connections. Ensure all cables are securely connected to prevent malfunctions.

Image: Detailed wiring diagram showing connections for MIC, SUB WOOFER, CVBS IN, VIDEO OUT, AUDIO OUT R/L, AUX IN R/L, Fan, and SIM Cable.

Image: Rear view of the multimedia player showing port locations for GPS, Camera Input, USB1, USB2, ANT, 4G Antenna, and RCA Cable.

• MIC: Connect external microphone for improved call quality.
• SUB WOOFER: Output for subwoofer connection.
• CVBS IN 1: Composite video broadcast signal input.
• VIDEO OUT: Video output for external displays.
• AUDIO OUT R/L: Right and Left audio outputs.
• AUX IN R/L: Right and Left auxiliary audio inputs.
• Fan: Connection for the cooling fan.
• SIM Cable: For 4G network functionality (Only for T10/G20 models as per image, but product description implies 4G for T20).
• GPS: Connect the GPS antenna.
• Camera Input: Connect the rear view camera.
• USB1/USB2: Connect USB devices.
• ANT: Connect the radio antenna.
• 4G Antenna: Connect the 4G antenna for network access.

4. Operating Instructions

4.1 Basic Operation

• Power On/Off: Press and hold the power button on the unit or use the vehicle's ignition.
• Touch Screen: The unit features a QLED 1280*720P touch screen for intuitive control.


Image: High-definition QLED display for clear visuals.

• Steering Wheel Controls: The unit supports original steering wheel controls for adjusting volume, answering calls, and switching songs.


Image: Illustration of steering wheel control functionality.

• Adjustable Button Color: Customize the color of the physical buttons on the unit to match your car's interior or personal preference. Options include White, Red, Orange, Yellow, Green, Cyan, Blue, and Purple light.


Image: Visual representation of various button color options.

4.2 Navigation and Connectivity

• GPS Navigation: Utilize free map navigation with various supported applications.


Image: Display showing map navigation in use.

• Wireless CarPlay & Android Auto: Connect your smartphone wirelessly for seamless integration of apps, navigation, and communication. Wired connection is also supported.


Image: Demonstrating wireless and wired CarPlay/Android Auto connections.

• Bluetooth 5.4: Enjoy hands-free calls, sync contacts, access call records, and stream music with minimal delay and improved power efficiency.


Image: Bluetooth 5.4 chip and its functionalities.

• 4G Network: Insert a 4G SIM card (via the 4G SIM cable) to access online services, streaming apps (YouTube, TikTok, Prime Video, Netflix), and more.


Image: Overview of 4G network capabilities and SIM card insertion.

• Wi-Fi: Built-in 5GHz Wi-Fi for internet connectivity.
• Wireless Mirror Link: Mirror your smartphone screen onto the multimedia player display.


Image: Demonstrating wireless mirror link from a smartphone to the car display.

4.3 Multimedia and Customization

• Audio Features: DSP (Digital Signal Processing), EQ (Equalizer), and RDS (Radio Data System) are integrated with the TDA7851 amplifier for customizable and powerful sound.


Image: Visualizing the DSP, EQ, and RDS audio processing capabilities.

• FM & AM Radio: Access various radio stations with clear reception.


Image: FM and AM radio interface with examples of road conditions, weather forecast, and news.

• Split Screen Display: Run two applications simultaneously for enhanced multitasking, such as navigation and music playback.


Image: Example of split-screen functionality with navigation and music.

• DIY Car Model Customization: Personalize the homepage display by selecting your preferred car model, color, wheel color, and license plate.


Image: Interface for customizing the car model display on the homepage.

• Free UI Themes: Choose from a wide selection of free themes to customize the user interface.


Image: Examples of different free user interface themes.

4.4 Advanced Driver Assistance Systems (ADAS)

• ADAS DVR: Connect a USB DVR for advanced driver assistance features like LDWS (Lane Departure Warning System) and FCWS (Forward Collision Warning System).


Image: ADAS DVR in action, displaying warnings for distance and lane.

• Streaming Camera: Automatically switches to the reverse screen with parking lines when reversing the car.


Image: Rear view camera display with parking assistance lines.

• TPMS (Tire Pressure Monitoring System): Displays the pressure and temperature of all four tires in real-time.


Image: Tire Pressure Monitoring System interface showing real-time tire data.

5. Maintenance

• Cooling Fan: The radio is equipped with a powerful cooling fan to prevent reboots, abnormal touch responses, or abnormal functions caused by overheating during long-term use. Ensure the fan is not obstructed and has adequate airflow.


Image: Diagram illustrating the cooling fan and its function in maintaining optimal CPU temperature.

• Software Updates: Regularly check for and install software updates to ensure optimal performance and access to new features.
• Cleaning: Use a soft, dry cloth to clean the screen and unit. Avoid abrasive cleaners or solvents.

6. Troubleshooting

Q: Why won't the car radio turn on?

• Check the fuse: Test with a multimeter/electric pen or visually inspect for burns; replace if damaged.
• Verify the red "ACC" wire: Ensure it has 12V-14V voltage (connect to yellow "B+" wire to test if no tools).
• Contact customer service: If the above are normal but the radio still doesn’t start, contact support.

Q: What is the password set for entering the factory settings?

A: Common passwords include: 1234, 123456, 000000, 8888, 888888, 111333, 7890, 22558800, 1617.

Q: Why does "No Signal" appear when reversing?

A: Ensure the rear camera cable is properly connected to the radio’s "CAMIN" port.

Q: Does the 4G version support my local SIM card?

A: Supported bands are:

• 2G: GSM900 (Band8), DCS1800 (Band3), CDMA (BandC0)
• 3G: TD-SCDMA (Band34), WCDMA (Band1), CDMA2000 (BandC0)
• 4G: TD-LTE (Band39/40/41), FDD-LTE (Band3)

Please check with your local carrier for compatibility.

Q: Are installation videos or user manuals available?

A: Installation videos are searchable on YouTube. For the latest user manual, contact customer service through the store's backend and provide your email address.

7. Specifications

Image: Comparison table of features across different Srnubi models (T20, T10-B, T6, T4, K3).

8. Warranty and Support

Srnubi offers comprehensive support for its products.

• Technical Support: For any technical assistance, reach out via the contact information provided on your warranty card or through the store's backend messaging system. Support staff will respond promptly, accounting for time zone differences.
• User Manual: The latest user manual can be obtained by contacting customer service through the store's backend and providing your email address.
• Warranty Extension: Leave a 5-star rating with photos of your product to extend your warranty to 2 years.
• Issue Resolution: If you encounter any issues, please contact customer service first. They aim to reply within 24 hours and offer lifetime service to ensure a satisfactory solution.

After receiving the package, if you have any questions, please contact us via email or the store backend. We will reply to you as soon as possible and provide you with a perfect solution. If you contact us by email, please attach the order screenshot in the email so that we can find your order as soon as possible.

9. User Tips

• Android Auto Compatibility: Be aware that certain Android phone models (e.g., Samsung S23, Note 20, S20, Galaxy A20 (SM-A205G), M22, A54, S22+; Huawei P40 Pro, P30/P30 Pro/P30 Lite (MAR-LX1A), P20 Pro, Mate 20/Mate 20 Pro, P Smart 2019 (POT-LX1), Nova 5T, Mate Lite 10; Xiaomi 12 Pro, 11 Lite, 9, Redmi 9; Oppo Reno 2, Reno 2 Z, A16s) may not connect to Android Auto. If you own one of these models and rely on Android Auto, consider this before purchase.
• SIM Card Installation: For 4G functionality, ensure the SIM card is correctly inserted into the 4G SIM cable. The design allows for easy replacement without disassembling the unit.
• Overheating Prevention: The built-in cooling fan is crucial for maintaining performance. Ensure it has adequate airflow to prevent reboots or touch issues.
• Customization: Explore the various free UI themes and DIY car model customization options to personalize your device's appearance.