1. Introduction
This manual provides essential information for setting up, operating, and maintaining your TCL 75-Inch Class S4 4K LED Smart TV with Fire TV (Model: 75S450F-CA). Please read this manual thoroughly before using your television to ensure proper function and safety.

Image 1.1: Front view of the TCL 75-Inch Class S4 4K LED Smart TV displaying a football game.
2. What's in the Box
Verify that all components are present in the packaging:
- TCL 75-Inch Class S4 4K LED Smart TV
- Power Cable
- Remote Control
- TV Stand (2 pieces)
- Screws for Stand Assembly
- Quick Start Guide (not included in this digital manual)
3. Setup
3.1 Attaching the TV Stand
- Carefully place the TV face-down on a soft, flat surface to prevent screen damage.
- Align each stand leg with the corresponding screw holes on the bottom of the TV.
- Secure each stand leg using the provided screws. Ensure they are tightened firmly.

Image 3.1: Detail of the TV stand attachment.
3.2 Wall Mounting (Optional)
If you choose to wall mount your TV, ensure you use a VESA-compatible wall mount kit (not included) that supports the TV's weight and size. Follow the instructions provided with your wall mount. Remove the stand legs before wall mounting.

Image 3.2: Rear view of the TV indicating VESA mounting points.
3.3 Connecting Power
Connect the power cable to the TV's power input and then to a wall outlet. The TV will enter standby mode.
3.4 Initial Setup
Upon first power-on, the TV will guide you through the initial setup process, including:
- Language selection
- Network connection (Wi-Fi or Ethernet)
- Fire TV account login or creation
- Channel scan (if connecting an antenna)
4. Operating the TV
4.1 Remote Control
The included remote control allows you to navigate the Fire TV interface, adjust volume, change channels, and access various functions. Insert two AAA batteries (not included) into the remote control.

Image 4.1: Fire TV remote control and user interface.
4.2 Fire TV Interface
Your TV features the Fire TV operating system, providing access to a wide range of streaming services, apps, and live TV. Navigate using the remote's directional pad and select button. Use the Alexa voice remote by pressing and holding the voice button to issue commands or search for content.
- Home Screen: Access your favorite apps, recently watched content, and personalized recommendations.
- Apps: Download and manage streaming applications like Netflix, Prime Video, Disney+, and more.
- Settings: Adjust picture, sound, network, and system settings.
4.3 Alexa Built-in and Apple AirPlay
The TV integrates Alexa for voice control. Press and hold the voice button on your remote to activate Alexa. For Apple users, AirPlay compatibility allows you to share videos, photos, and music from compatible iPhone or iPad devices directly to your TV.
5. Key Features
- 4K Ultra HD Resolution: Experience content with four times the resolution of 1080p Full HD, providing enhanced clarity and detail.

Image 5.1: Visual representation of 4K Ultra HD Resolution.
- HDR PRO (Dolby Vision, HDR10, & HLG): Enjoy enhanced contrast, accurate colors, and fine details across various HDR formats.

Image 5.2: HDR PRO technology enhancing picture quality.
- Motion Rate 240 with MEMC Frame Insertion: Multiple motion enhancement technologies combine to provide exceptional clarity for fast-moving scenes in sports and action movies.

Image 5.3: Motion Rate technology for clear fast-action scenes.
- Dolby Atmos: Experience immersive cinematic audio with Dolby Atmos built-in, creating a three-dimensional sound experience.

Image 5.4: Dolby Atmos for immersive sound.
- Auto Game Mode (ALLM): Automatically activates game mode to reduce input lag and latency, optimizing performance for gaming.

Image 5.5: Auto Game Mode for optimized gaming.
- FullView Metal Bezel-less Design: An elegant edge-to-edge design that integrates seamlessly into any home environment.

Image 5.6: FullView Metal Bezel-less Design detail.
- Bluetooth Personal Audio: Connect compatible Bluetooth headphones or speakers for a personalized audio experience.

Image 5.7: Bluetooth connectivity for personal audio.
6. Connections
The TCL S4 Series TV offers multiple ports for connecting external devices. Refer to the diagram below for port locations and functions.

Image 6.1: TV connection ports diagram.
- USB (Flash Drive): Connect a USB flash drive to view pictures and movies.
- ETHERNET (Internet Router): For a stable wired internet connection.
- HDMI 1 (eARC): HDMI input with Audio Return Channel for connecting soundbars or AV receivers.
- HDMI 2, HDMI 3: Standard HDMI inputs for gaming consoles, Blu-ray players, etc.
- CABLE/ANT: Connect an antenna or cable TV signal.
- AV INPUT: Connect older game consoles or VCRs using an adapter.
- HEADPHONE: Use headphones or an older stereo system.
- AUDIO OUT (OPTICAL): Digital audio output for soundbars or receivers.
7. Maintenance
7.1 Cleaning the Screen
Gently wipe the screen with a soft, dry, lint-free cloth. For stubborn marks, lightly dampen the cloth with water or a specialized screen cleaner. Avoid using harsh chemicals, abrasives, or direct spraying onto the screen.
7.2 Cleaning the TV Body
Wipe the TV's exterior with a soft, dry cloth. Do not use liquid cleaners directly on the TV body.
7.3 General Care
- Unplug the TV from the power outlet before cleaning or moving.
- Avoid placing the TV in direct sunlight or near heat sources.
- Ensure adequate ventilation around the TV.
- Protect the TV from moisture and dust.
8. Troubleshooting
If you encounter issues with your TV, refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| No power / TV won't turn on |
|
| No picture / Black screen |
|
| No sound |
|
| Remote control not working |
|
| Network connection issues |
|
9. Specifications
| Feature | Detail |
|---|---|
| Brand | TCL |
| Model | 75S450F-CA |
| Screen Size | 75 inches |
| Display Technology | 4K UHD HDR LED |
| Resolution | 3840 x 2160 |
| Refresh Rate | 60 Hz (Motion Rate 240) |
| Operating System | FireOS |
| HDR Support | Dolby Vision, HDR10, HLG |
| Audio Technology | Dolby Atmos, DTS Virtual:X |
| Connectivity | Wi-Fi, Ethernet, Bluetooth, HDMI (3 ports, 1 eARC), USB (1 port), Cable/ANT, AV Input, Headphone, Optical Audio Out |
| Special Features | Alexa Built-in, Apple AirPlay, Auto Game Mode (ALLM), Bezel-Less Design |
| Product Dimensions (W x H x D) | 166.8 cm x 95.9 cm x 9.2 cm (without stand) |
| Weight | 28.12 kg |
| Power Consumption | 30 watts (typical) |

Image 9.1: TV dimensions.
10. Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or visit the official TCL support website. Keep your purchase receipt as proof of purchase for warranty claims.
Online Support: www.tcl.com/ca/en/support