Tp.ms3458.pc757 Service Manual !free!

TP.MS3458.PC757 is a commonly used 4K UHD smart TV motherboard found in brands like

The TP.MS3458.PC757 is a highly versatile "three-in-one" smart TV mainboard, combining the power supply, LED backlight driver, and signal processing unit onto a single PCB. It is commonly found in budget-friendly 4K UHD televisions from brands like RCA, Bauhn, iLive, and Avera. Core Technical Architecture tp.ms3458.pc757 service manual

1. Detailed Block Diagrams: Shows signal flow from tuner to panel.
2. Voltage Reference Points: Exact DC voltages at test points (e.g., 3.3V_STB, 1.2V_CORE, 12V_PANEL).
3. Service Mode Access: Key sequences to enter the factory menu for panel timing adjustments.
4. PCB Layouts: Component locations (capacitors, resistors, ICs) for accurate soldering.

Common TP.MS3458.PC757 Problems (Solved Using the Manual)

Problem 1: TV won’t turn on (red standby LED only)

Manual solution:
Measure P_ON pin (usually on connector CN1). Should go from 0V to 3.3V when pressing power. If not, main chip isn’t booting → check VDD_CORE (1.2V) and SPI flash continuity. Detailed Block Diagrams: Shows signal flow from tuner

1. Download the exact service manual matching your board’s silkscreen revision (look for REV: 1.3 or REV: 2.0).
2. Always start with power supply voltages and visual inspection.
3. Use UART logging (TX, RX, GND pins on the board) to read error codes—this is the “black box” of the TV.

Step 2: Standby Voltage Check

• Locate the pin header CN1 (connects to power supply).
• Per the manual’s pinout:

  has active threads where technicians share specific component values like RB305 and CB303. Elektrotanya Common Troubleshooting Symptoms Common TP

  12. Schematics & PCB Cross-Reference

  • Include full schematics for power, backlight, and signal sections.
  • Annotate connectors and test points on PCB overlay diagrams.
  • Provide layer views if available (silkscreen, top/bottom copper).

  No Backlight (Sound but No Image): Test the LED+ output. If voltage is present but the screen is dark, the LED strips inside the panel may be open. If voltage is 0V, the onboard LED driver circuit is likely defective.