1. Introduction
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your CHSTEK Car Radio. Please read this manual thoroughly before using the product to ensure proper functionality and safety.
2. Safety Information
- Ensure the vehicle's power is off before installation.
- Professional installation is recommended for optimal performance and safety.
- Do not disassemble or modify the device.
- Avoid exposing the device to extreme temperatures or moisture.
- Always prioritize safe driving. Do not operate the device in a way that distracts you from the road.
3. Package Contents
Verify that all items are present in the package:
- CHSTEK Car Radio Unit
- USB Cable (4-pin)
- USB Cable (6-pin)
- GPS Antenna
- Harness Wire
- Rear View Camera Input / WiFi / Bluetooth Antenna
- Microphone Cable
- 4G Antenna (if applicable to your model)
- RCA Cable
- Special Removal Tools Key
4. Specifications
The following table outlines the general specifications of the CHSTEK Car Radio:
| Feature | Description |
|---|---|
| Brand Name | CHSTEK |
| For Vehicle Brands/Model | Audi A3 8P S3 RS3 (2003-2013) |
| Operating System | Android 13 (varies by version) |
| Display Size | 7" |
| Resolution | 1024*600P |
| RAM | 8G (varies by version) |
| ROM | 256G (varies by version) |
| Network | 4G LTE SIM WIFI Bluetooth Autoradio |
| Bluetooth | Bluetooth 5.0 |
| Special Features | Built-In Speaker/Microphone, WiFi function, Support steering wheel control, Support 4G Network, Support Can-Bus, Built-in GPS, Charger, Mobile Phone, MP3 players, DSP, CarPlay, Android Auto, Reversing Input, Split Screen |
| Digital Media Format | Mp3, MP4, WMA, JPEG |
| Voltage | 12 V |
| Item Weight | 1.5kg |
| Certification | CE |
| OEM NO. | FG-7073 |
For a detailed comparison of different versions and their specific configurations, please refer to the product parameters table below:
5. Installation Guide
This section provides general installation guidelines. Due to variations in vehicle models, professional installation is highly recommended.
5.1 Compatibility
This car radio is designed for Audi A3 8P S3 RS3 models from 2003-2013.
5.2 Pre-Installation Check
- Ensure the vehicle's ignition is off and the battery is disconnected.
- Use the provided special removal tools key to carefully remove the original radio unit.
- Inspect the existing wiring harness in your vehicle.
5.3 Wiring Diagram
Refer to the following wiring diagrams for proper connection of the car radio and its accessories. Incorrect wiring can damage the unit or vehicle electronics.
Key connections:
- Power: Connect the main power harness to the vehicle's power supply.
- Speakers: Ensure correct polarity for all four speakers (front left, front right, rear left, rear right). This unit supports sound output for all four speakers.
- CAN Bus: Connect the CAN bus wires for steering wheel control and other vehicle data integration.
- USB Cables: Connect the provided 4-pin and 6-pin USB cables for external media and device charging.
- GPS Antenna: Mount the GPS antenna in a location with a clear view of the sky.
- Microphone: Connect the external microphone for hands-free calling.
- 4G Antenna: If your model supports 4G, connect the 4G antenna. Note: 4G SIM card network function may not be supported in the Americas, Japan, and South Korea due to carrier and network baseband differences.
- RCA Cables: Use RCA cables for additional audio/video inputs or outputs.
5.4 Post-Installation
- Reconnect the vehicle's battery.
- Turn on the ignition and power on the car radio.
- Perform initial setup and testing of all functions (radio, Bluetooth, GPS, etc.).
6. Operating Instructions
6.1 Basic Operation
- Power On/Off: Press the PWR button to turn the unit on or off.
- Volume Control: Use the VOL knob to adjust the volume.
- Menu Navigation: Use the touch screen or physical buttons (MENU, BAND, MODE, NAVI, RST) to navigate through menus and functions.
6.2 User Interface (UI) Overview
Your car radio may feature different user interfaces depending on the specific model and software version. Examples of UIs include UIS7870A, FY7862, FY8581, FY818, and QCM6125.
6.3 Bluetooth Connectivity
The unit features Bluetooth 5.0 for fast and stable connections.
- Go to the Bluetooth menu on the car radio.
- Enable Bluetooth on your mobile device and search for available devices.
- Select the car radio from the list and pair.
- Once paired, you can stream music, make hands-free calls, and synchronize phone contacts.
6.4 CarPlay and Android Auto
This unit supports built-in wireless CarPlay and wired Android Auto, allowing you to mirror your smartphone's interface on the car radio screen.
- Wireless CarPlay: For iPhone users, connect wirelessly to access navigation, calls, messages, and music.
- Wired Android Auto: For Android users, connect via USB to access GPS mapping, music playback, SMS, and web search.
6.5 Network Connectivity (4G & WiFi)
The unit has built-in WiFi and supports a 4G SIM card slot (check regional compatibility).
- WiFi: Connect to any available WiFi hotspot for online navigation, video streaming, music, and app downloads from the Google Play Store.
- 4G SIM Card: Insert a 4G SIM card into the dedicated slot for mobile data connectivity. Note: 4G network function may not be available in the Americas, Japan, and South Korea due to carrier differences.
6.6 DSP Sound System
The Digital Sound Processor (DSP) allows for advanced audio customization.
- EQ Settings: Adjust the equalizer to fine-tune treble, midrange, and bass.
- Position Adjustment: Optimize sound output timing for each speaker to create a perfect sound field, especially for the driver's seat.
- 3D Surround Sound: Simulate a surround sound experience by adjusting sound timing from the four speakers.
- Bass Enhancement: Boost bass frequencies for a more powerful and flexible low-end.
- Bass Filter: Filter out bass frequencies to enhance the clarity of middle and high tones.
6.7 Steering Wheel Control
The unit is compatible with most steering wheel control functions for safer operation.
- Easily switch songs, change channels, and adjust volume without taking your hands off the wheel.
6.8 Radio Function
The radio supports automatic and manual station search. It also features an RDS function for European users, automatically selecting stable frequencies.
6.9 Camera Support (Rear View, ADAS DVR, 360° Panorama)
- Rear View Camera: Automatically switches to the reverse screen with parking lines when the car is in reverse.
- Front ADAS DVR + Rear View Dual Recorder (Optional): Supports Advanced Driving Assistance System (ADAS) with 1080P live display and recording for enhanced driving safety.
- 360° Panorama Function (Optional): If equipped with the 360-chip hardware, the unit supports a Super-3D 360° Panoramic All-in-one system using 4x220° ultra-wide-angle cameras to eliminate blind spots.
Note: The 360 panorama function requires specific hardware support from the factory. If the 360 chip hardware option was not purchased, this function will not be available.
6.10 TPMS Support (Optional)
With the OBD2 function, you can retrieve real-time data and trouble codes from your vehicle's computer, displayed in an easy-to-read format.
6.11 HDMI/AV-Out
The HDMI/AV-Out port allows you to connect to an external monitor or device, sharing high-definition audio and video with all passengers.
6.12 Split Screen Function
Run two functions simultaneously and display them together on the screen (e.g., video playback + navigation, navigation + music player). Note that some third-party apps may not support split-screen if there are function conflicts.
6.13 Button Light Color Function
The built-in colorful light hardware allows you to customize the button illumination to any color you prefer.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the screen and unit. Avoid abrasive cleaners or solvents.
- Software Updates: Periodically check for software updates to ensure optimal performance and access to new features. Updates can usually be found on the manufacturer's website or through the device's settings.
- Temperature: Avoid exposing the unit to extreme temperatures.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on | Incorrect wiring, blown fuse, vehicle battery disconnected. | Check power connections, inspect vehicle fuses, ensure battery is connected. |
| No sound from speakers | Incorrect speaker wiring, volume too low, mute activated. | Verify speaker connections and polarity, increase volume, check mute status. |
| Bluetooth not connecting | Bluetooth off on device/phone, device not in pairing mode, interference. | Ensure Bluetooth is enabled on both devices, put unit in pairing mode, try restarting both devices. |
| GPS signal weak or lost | GPS antenna improperly installed or obstructed. | Relocate GPS antenna to a position with a clear view of the sky. |
| 4G SIM card not working | Regional incompatibility, incorrect SIM card insertion, carrier issues. | Verify regional 4G compatibility (e.g., Americas, Japan, South Korea may have issues), reinsert SIM card, contact your carrier. |
| Screen unresponsive or frozen | Software glitch, temporary system error. | Press the RST (Reset) button with a thin object (e.g., paperclip) to restart the unit. |
9. User Tips
- Professional Installation: Many users recommend professional installation to avoid wiring issues and ensure all features work correctly.
- 4G Connectivity: If you are in the Americas, Japan, or South Korea, confirm 4G compatibility with customer service before relying on this feature, as some regions may not be supported.
- Sound Customization: Experiment with the DSP EQ settings and position adjustment to find your preferred audio profile.
- Reset Button: If the unit becomes unresponsive, locate the small RST button (often recessed) and press it with a non-sharp object to perform a soft reset.
10. Warranty and Support
10.1 Warranty Information
All CHSTEK car radio units come with a 12-month manufacturer warranty. This warranty covers defects in materials and workmanship under normal use.
The warranty does NOT cover:
- Damage resulting from improper installation, accident, misuse, abuse, improper wiring, or incorrect voltage operation.
- Damage caused by undue wear and tear, dirt, neglect.
- Any damages caused by improper packaging when returning the item.
- Units disassembled or repaired by unauthorized personnel.
10.2 Technical Support
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact CHSTEK customer service. Provide your product model and a detailed description of the issue for faster support.
It is recommended to ask professionals to install products and test them first before installation. The manufacturer is not responsible for issues arising from self-installation or uninstallation.