The TP.MS3458.PC757 is a combo board that integrates the main controller, power management, and LED backlight driver functions onto a single PCB. High-speed 4K UHD engine. Resolution: Supports up to 3840 × 2160 (4K). Input/Output: HDMI, USB, AV, RF, and LAN ports. Application: Primarily found in UHD LED TVs. 2. TP.MS3458.PC757 Service Manual Content Breakdown
The core processor is typically an chip from MStar (now MediaTek), paired with NAND flash or SPI flash memory for firmware.
For in-depth repairs, having the schematics is vital. You can find the PCB layout and schematics on technical forums. Download at Elektrotanya TP.MS3458.PC757 PDF on Scribd: View on Scribd tp.ms3458.pc757 service manual
Powers the infrared (IR) receiver, physical keypad, and the main SoC standby block.
Powers the onboard DDR RAM chips.
If the screen colors are distorted, cycle through the values (0, 1, 2, or 3) until the colors render normally (switches between VESA and JEIDA standards).
Converts AC mains voltage into the various DC rails ( , etc.) required for operation. The TP
The boot partition frequently becomes corrupted on these smart boards due to unexpected power cuts. Flashing fresh firmware via USB or an RT809H programmer is required.
Check if the backlight driver on the power board is working. 4. Firmware Update Procedure Input/Output: HDMI, USB, AV, RF, and LAN ports