Welcome to teckwiki.com! This post offers all firmware files for the CV668M V1.2 universal TV motherboard, available for free download. It’s written for technicians and DIY users who want clear, helpful information. You’ll find details on the motherboard’s features, how to upgrade firmware, and more. Let’s get started.
Features of CV668M V1.2
The CV668M V1.2 is a multi-purpose LCD controller board built for FULL HD LCD panels. It’s popular in Russian and Asian markets. Here’s what it offers:
Input/Output Ports
- PC-RGB
- HDMI/Scart (optional)
- AV/YPBPR (optional)
- VGA
- TV signal input
- Earphone output
- USB port (for firmware upgrades)
- RF TV interface
Audio and Power
- Audio output: 2 x 3 Watt (8 ohm)
- Panel voltage: +3.3V, +5V, or +12V (set by jumping cap)
- Working input voltage: DC +12 Volt
- Maximum current: 2000mA (without panel)
- Standby power: Less than 0.2W
Panel Support
- Supports single or dual channel LVDS interfaces
- Works with various FULL HD LCD panels
- Display format: HD
- TV system: PAL, SECAM, NTSC
The board also has a multi-language OSD (On-Screen Display) and IR control via remote. Its key buttons include CH-, CH+, MENU, VOL-, VOL+, Source, and Power.
How to Upgrade Firmware
Upgrading firmware on the CV668M V1.2 is simple. Follow these steps carefully:
- Prepare a USB drive: Make sure it’s empty.
- Download the firmware: Pick the file that matches your TV’s resolution (e.g., 1920×1080).
- Copy the file: Put the firmware file onto the USB drive.
- Connect the USB: Plug it into the motherboard’s USB port.
- Attach the keyboard: Link it to the mainboard.
- Power it on: Connect the DC +12V power supply.
- Check the keyboard light: A flashing light means the firmware is updating. Wait until it turns green.
- If it fails: If no light flashes, unplug the power, reinsert the USB, and power on again.
All firmware files support the M90 General Remote Control and work with 4MB Flash Memory.
Available Firmware Files
This post provides firmware files for the CV668M V1.2, covering many resolutions:
- 1024×768
- 1366×768
- 1440×900
- 1600×900
- 1680×1050
- 1920×1080
- 1920×1200
Download the RAR file below. Inside, you’ll find multiple files. Choose the one that fits your TV’s panel resolution.
Download Here
Note: Link will be added when files are uploaded.
| Filename | Download |
|---|---|
| CV668M V1.2-T260XW02 V.M | Download |
Choosing the Right Firmware
Picking the correct firmware matters. Check your TV’s panel resolution in the user manual or on the panel’s label. Match it to one of the files listed above. If you’re not sure, ask a technician to avoid mistakes.
Factory Service Mode
To enter factory service mode on the CV668M V1.2, you may need a key combination like “Input+” on the remote or buttons. The exact steps aren’t clear from the info provided. Look at your board’s manual or contact the manufacturer for help.
Troubleshooting Common Issues
Problems after upgrading? Try these fixes:
- Wrong display: Confirm you used the right firmware for your resolution.
- No power: Check the USB drive and file. Repeat the process.
- No update: Ensure all connections are firm. Retry the steps.
- Still stuck? Reset the board if possible, then update again.
Take your time with each step to get it right.
Conclusion
The CV668M V1.2 is a solid universal TV motherboard for repairs or projects. This guide gives you the tools to upgrade its firmware and use its features fully. Download the files, follow the steps, and let us know your questions in the comments below.
Download Link:
- CV668M V1.2 Firmware, Dump Free Download
- CV6683-L42 Firmware: Download and Guide
- CV6683H-C42 Firmware Download
