User manual for the Changrui M969V multi‑function LCD driver board, covering specifications, installation, software upgrade and troubleshooting.
The Changrui M969V is a multi‑function LCD display driver board with HDMI, DVI, DP and VGA inputs, supporting UHD resolutions up to 3840×2160. The manual provides an overview of the product, performance specifications, physical dimensions, and detailed wiring diagrams.
It also explains how to perform ISP firmware upgrades, configure communication ports, operate the PC control software, and troubleshoot common issues such as power‑on failures or serial‑port errors. This manual is written in Chinese.
| Working temperature | -25°C to 85°C |
|---|---|
| Working humidity | < 95% RH |
| Power consumption | ≤300 W (depends on screen size) |
| Power voltage | 95 V AC‑250 V AC |
| Control interface | RS‑232 (RJ45) |
| VGA input resolution | WUXGA (1920×1080) |
| DVI input resolution | WUXGA (1920×1080) |
| HDMI/DP input resolution | UHD (3840×2160) |
| DP output resolution | UHD (3840×2160) |
| Supported screen resolutions | 3840×2160@30 Hz / 2560×1600@60 Hz / 1920×1080@120 Hz |
Verify that the power cable is intact, the mains supply is connected, the power switch is on, and that any fuse is not blown. Also ensure the board is receiving power before attempting further troubleshooting.
Open the Windows Device Manager, expand “Ports (COM & LPT)”, and note the COM number assigned to the RS‑232 cable. Select that COM port in the software’s communication settings.