Tp.v56.pb801 Schematic Diagram Pdf Best

The TP.V56.PB801 is a highly popular three-in-one universal LED TV motherboard that integrates the main board, power supply, and LED driver into a single unit. It is commonly used as a replacement for 32-inch to 45-inch televisions and is compatible with various other models like the TP.VST59S.PB801 and SK801. TP.V56.PB801 Schematic Overview

“Typical,” he muttered. But something felt off. The schematic he had on file was a generic TP.V56.PB801 layout—a blurry JPEG from some defunct forum. It showed the power section on page two, the LED driver on page three, and the main SoC on page four. But his board had extra components: a small SOT-23-5 chip near the optocoupler that wasn’t on his diagram, and a resistor network that had been hand-soldered—poorly. Tp.v56.pb801 Schematic Diagram Pdf

• Main switching regulator(s) producing 12V, 5V, 3.3V rails.
• Inductors, Schottky diodes, output capacitors, current-sense resistors.
• DC-DC converters and their feedback networks (optocoupler to primary regulator for PWM control).

Typical component references and equivalents to look for

• Primary SMPS controllers: ICs like STR, TEA series, or generic PWM controllers.
• Secondary regulators: MPxx, RTxxx, AOZ, etc.; common MOSFETs: AOZ, IRF, Si2300-like logic-level types.
• LED drivers: FSxxx, ALxxx, or boost controllers with built-in MOSFET.
• Supervisors: reset ICs (e.g., MCP resets), voltage references (TL431).

Scenario: TV has 5V standby, but main 12V rail missing.

1. Open the PDF and locate connector CN902. Pin 5 shows "5VSB" present. Good.
2. Trace the 12V rail backward from CN902 pins 1-2. The schematic leads you to D905 (cathode to inductor L905).
3. Check the anode of D905 – The schematic shows it connects to the secondary winding of transformer T901.
4. Look at the primary side control: The PDF shows that the main PWM controller (IC901) only runs when the "PS_ON" (Power Supply On) signal from the main board goes high (3.3V).
5. Check PS_ON on the schematic – It likely goes through a transistor (Q904) and an optocoupler (IC902) to enable IC901.
6. Use your multimeter: If PS_ON is high but D905 has no voltage, the optocoupler or IC901 is dead. The schematic gives you exact pinouts to test.

Interfaces: Features standard HDMI, USB, VGA, AV, and RF (Cable TV) ports. The TP