Phonocar VM173
Phonocar VM173 7-Inch LCD Screen User Manual
Model: VM173
1. Introduction
The Phonocar VM173 is a versatile 7-inch LCD screen designed for in-car use, suitable for dashboard or headrest mounting. It supports both 16:9 and 4:3 aspect ratios, and is compatible with PAL/NTSC video formats with automatic switching. Featuring a resolution of 480x234 pixels, it offers adjustable brightness and contrast. The unit includes touch-sensitive controls, an IR remote control, and multiple input options for video and audio, making it an ideal display solution for various automotive applications.
2. Safety Information
- Read all instructions carefully before operating the device.
- Do not expose the unit to extreme temperatures, direct sunlight, or excessive moisture.
- Ensure proper ventilation around the unit to prevent overheating.
- Disconnect power before cleaning or performing any maintenance.
- Do not attempt to disassemble or modify the unit. Refer all servicing to qualified personnel.
- Securely mount the screen to prevent it from becoming a projectile during sudden stops or accidents.
3. Product Overview
3.1 Features
- 7-inch LCD display
- 16:9 and 4:3 aspect ratio compatibility
- PAL/NTSC auto-switching video system
- 480x234 RGB resolution
- Mirror function (vertical or horizontal)
- Adjustable color, contrast, and brightness
- IR remote control (with 2 channels for optional infrared headphones)
- Touch-sensitive control keys
- 2 Video inputs, 1 Audio input
- DC12V power input
3.2 Components
The package typically includes:
- Phonocar VM173 LCD Screen
- IR Remote Control
- AV Input Cable
- Flat surface mounting bracket
- Headrest mounting bracket
3.3 Controls and Connections

This image displays the Phonocar VM173 7-inch LCD screen. The screen itself is black with a silver bezel. A white arrow diagonally crosses the blue display area, indicating the 7-inch screen size. Below the screen, there are touch-sensitive control buttons: a power button, left/right navigation, menu (M/ENU), up/down navigation, and mode (M/ODE) buttons. The Phonocar logo is centered below the screen.
The control buttons are located on the front bezel below the screen:
- Power Button (⏻): Turns the unit on or off.
- Menu Button (M/ENU): Accesses the on-screen display (OSD) menu for settings.
- Navigation Buttons (<, >, ˇ, ˆ): Used to navigate through menu options and adjust settings.
- Mode Button (M/ODE): Switches between available video input sources.
Connections are typically located on the rear or side of the unit:
- DC12V Power Input: For connecting to the vehicle's 12V power supply.
- Video Inputs (x2): RCA connectors for video signals from external sources.
- Audio Input (x1): RCA connector for audio signals.
4. Setup
4.1 Mounting the Screen
The VM173 offers two primary mounting options:
- Flat Surface Mounting: Use the provided flat mounting bracket to secure the screen to a dashboard or other flat surface. Ensure the surface is clean and stable before installation.
- Headrest Mounting: Utilize the headrest mounting bracket to integrate the screen into a vehicle's headrest. Follow the specific instructions for your vehicle's headrest type to ensure a secure and stable fit.
Important: Ensure the screen is mounted securely and does not obstruct the driver's view or interfere with airbag deployment.
4.2 Connecting Power and Inputs
- Power Connection: Connect the DC12V power cable to the unit's power input and to a suitable 12V power source in your vehicle. It is recommended to connect to an ignition-switched power source to prevent battery drain.
- Video Input: Connect your video source (e.g., DVD player, backup camera) to one of the video input RCA connectors. The unit has two video inputs (Video 1, Video 2).
- Audio Input: If your video source also provides audio, connect its audio output to the unit's audio input RCA connector.
5. Operating Instructions
5.1 Powering On/Off
Press the ⏻ (Power) button on the front bezel or the remote control to turn the unit on or off.
5.2 Selecting Input Source
Press the M/ODE (Mode) button on the front bezel or the remote control to cycle through the available video input sources (Video 1, Video 2).
5.3 Adjusting Settings (OSD Menu)
Press the M/ENU (Menu) button to access the On-Screen Display (OSD) menu. Use the navigation buttons (<, >, ˇ, ˆ) to:
- Adjust Brightness, Contrast, and Color levels.
- Change the Aspect Ratio (16:9 or 4:3).
- Activate the Mirror Function (vertical or horizontal image flip).
- Select the Video System (PAL/NTSC, though typically auto-switches).
Press the M/ENU button again to exit the menu.
5.4 Using the IR Remote Control
The included IR remote control provides convenient access to all functions. Point the remote directly at the IR receiver on the unit. The remote also supports 2 channels for optional infrared headphones, allowing passengers to listen to audio wirelessly.
6. Maintenance
- Cleaning the Screen: Use a soft, lint-free cloth to gently wipe the screen. For stubborn smudges, slightly dampen the cloth with water or a screen-cleaning solution. Avoid harsh chemicals or abrasive materials.
- Cleaning the Unit: Wipe the exterior of the unit with a dry, soft cloth.
- Storage: If storing the unit for an extended period, disconnect it from power and store it in a cool, dry place away from direct sunlight.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable disconnected or fuse blown. | Check power connections. Verify vehicle's fuse for the power circuit. |
| No image/sound | Incorrect input selected or video/audio cables disconnected. | Press M/ODE to select the correct input. Check all video and audio cable connections. |
| Image distorted or poor quality | Incorrect aspect ratio, video system mismatch, or poor signal quality. | Adjust aspect ratio in OSD menu. Ensure video source is compatible (PAL/NTSC). Check video cable for damage. |
| Remote control not working | Batteries low or IR path blocked. | Replace remote control batteries. Ensure no obstructions between remote and unit's IR receiver. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Phonocar |
| Model | VM173 |
| Screen Size | 7 inches (17.78 cm) |
| Display Type | LCD |
| Resolution | RGB 480x234 pixels |
| Aspect Ratio | 16:9 and 4:3 compatible |
| Video System | PAL / NTSC (auto-switch) |
| Brightness | 250 nits |
| Viewing Angle | 60° horizontal - 60° vertical |
| Connections | 2 Video Input (RCA), 1 Audio Input (RCA) |
| Power Input | DC12V |
| Dimensions (L x H x P) | 178mm x 118mm x 20mm |
| USB Port | None |
9. Warranty and Support
9.1 Manufacturer Warranty
This Phonocar VM173 unit comes with a 1-year manufacturer warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
9.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Phonocar customer service through their official website or authorized distributors. Provide your product model number (VM173) and purchase details when seeking support.
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