CHSTEK Android 13 Car Radio Multimedia Head Unit

1. Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of your new CHSTEK Android 13 Car Radio Multimedia Head Unit. This device is specifically designed for Audi A3 8P, S3, and RS3 models manufactured between 2003 and 2013, offering advanced features such as wireless CarPlay, wired Android Auto, integrated navigation, Wi-Fi and 4G connectivity, Bluetooth 5.0, and a powerful DSP sound system.

Please read this manual thoroughly before installation and use to ensure proper functionality and to maximize your enjoyment of the product.

2. Vehicle Compatibility

This head unit is compatible with the following Audi models:

• Audi A3 8P (2003-2013)
• Audi S3 (2003-2013)
• Audi RS3 (2003-2013)

Important Notes:

• This model does not include a built-in DVD/CD player.
• It does not have an SD card slot; external media can only be connected via USB.
• The 7-inch touch screen features a 1024*600P resolution.
• For customers in the Americas (e.g., United States, Canada, Mexico, Brazil), Japan, and South Korea, the 4G network function is NOT supported due to different carriers and network baseband. Please be aware of this limitation before purchase.
• Unlike many other products, this device supports sound output to all four speakers (front and rear) thanks to customized power amplifier wires.

3. Package Contents

Please verify that all items are present in your package:

• CHSTEK Android 13 Car Radio Head Unit
• Power Harness
• GPS Antenna
• USB Cables
• RCA Cables
• External Microphone
• Double Fakra-Din Male Radio Antenna Adapter
• Special Removal Tools Key (for original radio removal)
• User Manual (this document)
• (Other accessories may vary based on specific version purchased)

4. Installation Guide

Professional installation is highly recommended. Incorrect installation can damage the device or your vehicle. Always disconnect the car battery before starting installation.

4.1 Removing the Original Radio

Use the provided special removal tools key to safely extract your original Audi radio unit. Insert the keys into the designated slots on the radio faceplate and pull gently to release the unit.

4.2 Connecting the Antenna Adapter

The package includes a Double Fakra-Din Male Radio antenna adapter to ensure your original radio functions perfectly with the new screen. Connect this adapter to the corresponding ports.

4.3 Wiring Diagram Overview

The following diagrams illustrate typical wiring connections. Please refer to the specific diagram corresponding to your purchased version (FY818, FY8581, FY7862, FY7870) for precise connections. Common connections include power, CAN bus, USB, RCA audio/video, GPS antenna, 4G antenna, and camera inputs.

Key Wiring Components (General):

• Power Harness: Connects to vehicle's power supply (ACC, B+, GND).
• CAN Bus Decoder: Integrates with vehicle's CAN bus system for steering wheel controls and other vehicle data.
• USB Ports: For external storage, wired Android Auto, or other USB devices.
• RCA Cables: For audio output (FL, FR, RL, RR, Subwoofer), video input/output, AUX input.
• GPS Antenna: For navigation functionality.
• 4G Antenna (if applicable): For 4G network connectivity.
• Camera Inputs: For backup camera, front camera, or 360° camera system.
• External Microphone: For improved call quality.

4.4 Post-Installation Check

After connecting all necessary wires and securing the head unit in place, reconnect the car battery. Power on the unit and perform initial setup. Verify all functions, including audio, touch screen response, steering wheel controls, and connectivity (Bluetooth, Wi-Fi, 4G).

5. Operating Instructions

5.1 User Interface (UI)

The head unit runs on Android 13, offering a customizable and intuitive user interface. Different versions (e.g., QCM6125, MT8667, FY7862, FY8581, FY818, UIS7870A) may feature distinct UI styles and layouts. Explore the settings to personalize your home screen, themes, and app organization.

5.2 Wireless CarPlay & Wired Android Auto

Connect your iPhone wirelessly via CarPlay or your Android device via a wired USB connection for Android Auto. These features mirror a simplified version of your phone's screen, allowing access to navigation, calls, messages, and music directly from the head unit's display.

5.3 4G & Wi-Fi Connectivity

The unit supports built-in Wi-Fi and a 4G SIM card slot (where supported by local networks). Connect to any network hotspot via Wi-Fi or insert a 4G SIM card to access online navigation, streaming media, and download apps from the Google Play Store.

Note on 4G:

4G network functionality is not supported in the Americas (United States, Canada, Mexico, Brazil), Japan, and South Korea due to regional network differences. Please ensure compatibility with your local network if 4G is a critical feature for you.

5.4 Bluetooth 5.0

Utilize Bluetooth 5.0 for faster transfer speeds, wider coverage, and enhanced anti-interference. Stream music from your phone (e.g., Spotify, Pandora) with high fidelity and make hands-free calls without noise while driving. The unit supports displaying incoming/outgoing/missed calls, downloading phonebook lists, and Bluetooth music synchronization.

5.5 DSP Sound System with EQ Settings

The integrated Digital Sound Processor (DSP) allows you to customize your audio experience. Adjust equalizer settings, sound position, and utilize features like 3D Surround Sound, Bass Enhancement, and Bass Filter for richer, clearer, and more powerful audio.

• 3D Surround Sound: Adjusts the timing of sound output from each speaker to create a surround effect, making you feel immersed in the music.
• Bass Enhancement: Boosts bass frequencies for a more powerful and flexible low-end sound.
• Bass Filter: Filters out bass frequencies to enhance the clarity and fullness of mid and high tones.

5.6 Steering Wheel Control

The head unit is compatible with most of your vehicle's original steering wheel control functions. Easily switch songs, change channels, and adjust volume without taking your hands off the wheel, minimizing distractions and enhancing driving safety.

5.7 Radio Function

The radio supports automatic and manual station searching. You can drag and drop station icons to customize your channel list. It also features RDS (Radio Data System) for European users, automatically selecting stable frequencies.

5.8 Split Screen Function

The split-screen feature allows two applications to run simultaneously on the display. For example, you can view navigation on one side and play music or video on the other. Note that some third-party applications may not fully support split-screen functionality if there are conflicts.

5.9 Customizable Button Lights

The unit features built-in colorful light hardware for its buttons. You can choose and customize the button light color to match your vehicle's interior or your personal preference.

5.10 Camera Support (ADAS DVR & 360° Panorama)

The head unit supports various camera systems to enhance driving safety:

• Front ADAS DVR + Rear View Dual Recorder: Optional Advanced Driving Assistance System (ADAS) with 1080P live display and recording. ADAS features help keep your driving safer.
• 360° Panorama Camera: Supports a Super-3D 360° Panoramic All-in-one Car Multimedia Player with 4x220° ultra-wide-angle lens cameras. This system captures the vehicle's surroundings to synthesize a seamless 360° aerial view, eliminating dangerous blind spots.

Important Note on 360° Panorama:

The 360° panorama function requires specific hardware support from the factory. If you did not purchase the option with the 360° chip hardware, your screen will not support this function in the future.

5.11 TPMS (Tire Pressure Monitoring System)

With the OBD2 function, you can retrieve real-time data and trouble codes from your vehicle's computer. This data is presented in an easy-to-read format, allowing you to monitor tire pressure and other vehicle diagnostics.

5.12 HDMI/AV-Out

The HDMI/AV-Out port provides a connection method between the head unit and an external monitor or other compatible device. This allows you to share high-definition audio and video with all passengers in your vehicle.

6. User Tips

• For optimal performance, ensure your device's software is kept up-to-date. Check for updates periodically through the system settings.
• If experiencing slow performance, try clearing cache from apps or performing a factory reset (note: this will erase all user data).
• When using navigation, ensure GPS antenna has a clear view of the sky for accurate positioning.
• For best hands-free call quality, use the external microphone if provided.

7. Specifications

The following table outlines the general specifications. Specific parameters may vary depending on the version (e.g., FY818, FY8581, FY7862, MTK8667, Qualcomm 6125, FY7870) of your head unit.

8. Troubleshooting

If you encounter any issues with your CHSTEK head unit, please refer to the following common troubleshooting steps:

• No Power: Check all power connections and fuses. Ensure the car battery is properly connected.
• No Sound: Verify speaker connections. Check volume levels and DSP settings. Ensure the correct audio source is selected.
• Touch Screen Unresponsive: Try restarting the unit. If the issue persists, a factory reset might be necessary (backup data first).
• GPS Signal Lost: Ensure the GPS antenna is installed in a location with a clear view of the sky. Check antenna connection.
• Bluetooth Connection Issues: Ensure Bluetooth is enabled on both the head unit and your mobile device. Try unpairing and re-pairing the devices.
• Steering Wheel Controls Not Working: Verify CAN bus connections and ensure the steering wheel control settings in the unit are correctly configured for your vehicle model.
• 4G/Wi-Fi Connectivity Problems: Check antenna connections. For 4G, confirm regional compatibility and ensure SIM card is correctly inserted and activated. For Wi-Fi, verify network password and signal strength.

For persistent issues, please contact CHSTEK customer support.

9. Warranty and Support

9.1 Warranty Information

All CHSTEK head units come with a 12-month manufacturer warranty. This warranty covers defects in materials and workmanship under normal use. The warranty does not cover damages resulting from:

• Improper installation, accident, misuse, abuse, or neglect.
• Improper wiring or incorrect voltage operation.
• Disassembly or repair by unauthorized personnel.
• Undue wear and tear or dirt.

To ensure proper functioning, all items are tested before shipping.

9.2 Customer Support

If you require technical assistance or have questions regarding your product, please contact CHSTEK customer support. When contacting support, please provide your product model (FG-7004A) and a detailed description of the issue.

It is recommended to seek professional assistance for product installation and initial testing to avoid issues that may void the warranty.