1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your XTRONS CM173HD 17.3-inch Full HD 1080P Car Overhead Monitor. Please read this manual thoroughly before using the product to ensure proper function and safety. Keep this manual for future reference.
The XTRONS CM173HD is designed to provide high-quality video entertainment for vehicle passengers, featuring a large 17.3-inch screen with 1920x1080 resolution, multiple input options, and flexible audio output capabilities.

Image 1.1: XTRONS CM173HD Overhead Monitor and Remote Control
2. Safety Information
- Professional Installation Recommended: Installation of this product requires technical knowledge and experience with vehicle electrical systems. It is highly recommended to have the unit installed by a qualified professional.
- Power Supply: Ensure the unit is connected to a 12V DC power supply. Incorrect voltage can damage the device.
- Wiring: Carefully follow the wiring diagram. Incorrect wiring can lead to malfunction, electrical short circuits, or fire.
- Mounting: Securely mount the unit to prevent it from dislodging during vehicle movement, which could cause injury.
- Operating Temperature: Do not expose the unit to extreme temperatures outside its specified operating range.
- Moisture: Keep the unit dry and away from moisture to prevent electrical hazards.
- Cleaning: Use a soft, dry cloth for cleaning. Avoid abrasive cleaners or solvents.
3. Package Contents
Verify that all items are present in the package:
- 1 x XTRONS CM173HD Overhead Monitor
- 1 x Remote Control
- 6 x Mounting Nuts
- 1 x User Manual

Image 3.1: Package Contents
4. Product Features
- 17.3-inch Full HD Display: A large 17.3-inch screen with 1920x1080 resolution for clear and vibrant visuals.
- Built-in HDMI Port: Connect external devices such as smartphones, game consoles, or digital TV boxes via HDMI.
- 130-Degree Rotatable Screen: Adjust the viewing angle for optimal comfort for all passengers.
- Blue Atmospheric LED Light Bar: Integrated LED lighting for ambient illumination.
- Positive and Negative Door Control: The LED lights can automatically turn on/off with the vehicle's door status.
- Sleek and Elegant Touch Panel: Intuitive touch-sensitive buttons for easy control.
- Built-in Stereo Speakers: Direct audio output from the monitor.
- Multiple Sound Output Options: Includes built-in FM transmitter and IR transmitter for wireless headphone connectivity (headphones not included).
- Dual AV Input Channels: Connect up to two external AV sources for versatile entertainment options.
- USB and SD Card Support: Play media files directly from USB drives and SD cards.
- Digital Media File Compatibility: Supports various formats including MOV, MP4, FLAC, WMV, WMA, AVI, MKV.
- Wireless Screen Mirroring: Compatible with Android and iOS devices using optional XTRONS HDT V05 accessory (sold separately).

Image 4.1: Key Product Features

Image 4.2: High Definition Display
5. Setup
5.1 Installation Considerations
Before beginning installation, ensure the vehicle's battery is disconnected. Professional installation is strongly recommended due to the complexity of vehicle electrical systems and the need for secure mounting. Consider the optimal placement for viewing and accessibility.
5.2 Wiring Diagram
Refer to the following diagram for correct wiring connections. Incorrect wiring can cause damage to the unit or vehicle.

Image 5.1: Wiring Diagram
- Door Control-: Connect to the negative door trigger wire of your vehicle.
- Door Control+: Connect to the positive door trigger wire of your vehicle.
- Audio Right Input 1: Right channel audio input for AV source 1.
- Audio Left Input 1: Left channel audio input for AV source 1.
- Video Input 1: Video input for AV source 1.
- Video Input 2: Video input for AV source 2.
- Audio Right Input 2: Right channel audio input for AV source 2.
- Audio Left Input 2: Left channel audio input for AV source 2.
- B+: Connect to the vehicle's constant 12V power supply.
- GND: Connect to the vehicle's ground point.
5.3 Mounting
The unit is designed for roof mounting. After identifying a suitable location, use the provided mounting nuts to securely fasten the monitor to the vehicle's ceiling structure. Ensure the mounting area is strong enough to support the unit's weight and that no critical wiring or components are obstructed or damaged during the process.
6. Operating Instructions
6.1 Power On/Off
Press the power button on the unit's touch panel or the remote control to turn the monitor on or off.
6.2 Source Selection
Use the 'Source' button on the touch panel or remote control to cycle through available input sources: HDMI, USB, SD, AV1, AV2.

Image 6.1: Dual AV Input Channels
6.3 Media Playback (USB/SD)
Insert a USB drive or SD card into the designated slot. The unit will automatically detect the media and display the file browser. Navigate through your files using the touch panel or remote control. Supported file systems for USB/SD are FAT32, with a maximum capacity of 32GB.

Image 6.2: Digital Media File Compatibility
6.4 Audio Output Options
- Built-in Speakers: Audio will play directly from the monitor's integrated speakers.
- Built-in FM Transmitter: Transmit audio to your vehicle's radio. Select an unused FM frequency on the monitor and tune your car radio to the same frequency. Available frequencies: 87.7, 88.1, 88.5, 88.9, 106.7, 107.1, 107.5, 107.9 MHz.
- Built-in IR Transmitter: For use with wireless infrared headphones (XTRONS DWH005, DWH006 are compatible, sold separately). The IR transmitter supports dual channels (A & B).

Image 6.3: Multiple Sound Output Options
6.5 Screen Adjustment
The screen can be rotated up to 130 degrees to achieve the best viewing angle for passengers.

Image 6.4: 130 Degree Rotatable Screen
6.6 Door Control Light Function
If connected to your vehicle's door control wires, the blue atmospheric LED lights will automatically turn on when a door is opened and turn off when all doors are closed. This replaces your existing roof light function.

Image 6.5: Door Control LED Lights
6.7 Touch Panel Controls
The sleek touch panel provides easy access to common functions:
- Power Button: Turns the unit on/off.
- Source Button: Cycles through input sources.
- Volume Up/Down: Adjusts the audio volume.
- Play/Pause: Controls media playback.
- Next/Previous: Skips tracks or navigates menus.

Image 6.6: Touch Panel Controls
6.8 Remote Control
The included remote control provides full functionality for operating the monitor from a distance, including power, source selection, volume, playback controls, and menu navigation.
6.9 Screen Mirroring (Optional)
To mirror your smartphone screen (Android or iOS) to the monitor, an optional XTRONS HDT V05 accessory is required. Connect the accessory to the monitor's HDMI input and follow the accessory's instructions for wireless connection.

Image 6.7: Wireless Screen Mirroring Setup
7. Maintenance
- Cleaning the Screen: Use a soft, lint-free cloth to gently wipe the screen. For stubborn marks, slightly dampen the cloth with water or a screen-safe cleaning solution. Avoid spraying liquids directly onto the screen.
- Cleaning the Unit Body: Wipe the exterior of the unit with a soft, dry cloth. Do not use harsh chemicals, solvents, or abrasive cleaners.
- Dust Removal: Regularly remove dust from the unit's vents and surfaces to ensure proper heat dissipation.
- Avoid Impact: Protect the screen and unit from physical impact to prevent damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Loose power connection; Blown fuse; Vehicle battery low. | Check power cables and connections; Inspect and replace fuse if necessary; Check vehicle battery. |
| No image/signal | Incorrect source selected; Loose video cable connection; External device not powered on or malfunctioning. | Select the correct input source; Check all video cable connections; Ensure external device is working correctly. |
| No sound | Volume too low or muted; Incorrect audio output selected; Loose audio cable connection. | Increase volume and check mute status; Select desired audio output (speakers, FM, IR); Check audio cable connections. |
| USB/SD card not reading | Unsupported file format; Incorrect file system (not FAT32); Card capacity exceeds 32GB; Corrupted media. | Ensure media files are supported; Format USB/SD card to FAT32; Use a card with capacity 32GB or less; Try a different USB/SD card. |
| Remote control not working | Dead batteries; Obstruction between remote and unit; Remote sensor blocked. | Replace batteries; Remove any obstructions; Ensure remote sensor on unit is clear. |
9. Specifications
| Feature | Specification |
|---|---|
| Brand | XTRONS |
| Model | CM173HD |
| Screen Size | 17.3 Inches |
| Display Type | LED |
| Resolution | 1920 x 1080 (Full HD) |
| Aspect Ratio | 16:9 |
| Input Ports | HDMI, USB, SD, Dual AV Input |
| Audio Output | Built-in Speakers, FM Transmitter, IR Transmitter |
| Screen Rotation | Up to 130 degrees |
| Power Supply | 12V DC |
| Item Weight | 9.9 pounds (approx. 4.5 kg) |
| Product Dimensions | 17.91 x 12.99 x 1.77 inches (455 x 330 x 45 mm) |

Image 9.1: Product Dimensions
10. Warranty and Support
XTRONS products typically come with a manufacturer's warranty. For specific warranty details, please refer to the warranty card included with your product or visit the official XTRONS website. For technical support, troubleshooting assistance, or any product-related inquiries, please contact XTRONS customer service.
You can often find contact information or a support portal on the XTRONS official website:
- Official Website: www.xtrons.com
- UK Website: xtrons.co.uk
Alternatively, if purchased through a retailer like Amazon, you can contact the seller directly through the platform's messaging system.

Image 10.1: How to Contact XTRONS Support