Tp.v56.pb801 Schematic Diagram

It sounds like you’re referring to a schematic diagram for a device labeled Tp.v56.pb801 — likely a TV main board (common in Chinese-made LCD/LED TVs, e.g., from brands like Hisense, TCL, or generic replacement boards).

Here’s what that string typically means:

TP.V56.PB801 – Board model number

TP = TV panel/mainboard series
V56 = Video processor chipset (often TSUMV56 or similar, e.g., MStar/TSU MV56)
PB801 = PCB version/revision

Common Component Failures on Tp.v56.pb801 (Intersecting the Schematic)

Cross-referencing real-world failure data with the schematic reveals: Tp.v56.pb801 Schematic Diagram

| Reference Designator | Component Type | Failure Mode | How Schematic Helps | | --- | --- | --- | --- | | D502 | Rectifier Diode (SB5100) | Short circuit (no 12V output) | Shows diode is in parallel with output capacitor | | U301 | 1117-3.3 LDO | Input shorted, no 3.3V | Shows input comes from 5VSB; trace back | | C104 | SMD Ceramic (10µF) | Cracked, causing random reboots | Schematic indicates it is the filter for SoC reset pin | | Q601 | MOSFET (LED driver) | Drain-source short (backlight always on or off) | Identifies gate drive from PWM controller | | F1 | Fuse (3.15A 250V) | Blown | AC input section; check bridge rectifier after |

A. Power Management Unit (PMU)

The board operates on a 12V DC input. The power section utilizes DC-DC buck converters to step down the input voltage to the levels required by the Main Processing Unit (MPU). It sounds like you’re referring to a schematic

5V Rail: Generated for USB interfaces and standby circuit logic.

3.3V Rail: Powers the Flash memory (EEPROM) and other logic peripherals.

1.2V/1.1V Rail: Dedicated power rail for the MCU core processing.

Common DC-DC ICs found in the schematic: MP1494 or MP1584 (Step-down converters).

B. Main Processor (MCU)

The heart of the board is the Mstar series processor (e.g., MST6M181VS). This BGA (Ball Grid Array) chip handles: TP = TV panel/mainboard series V56 = Video

Signal Processing: Decoding of HDMI, VGA, and AV inputs.

LVDS Output: Generating the Low-Voltage Differential Signaling required to drive the LCD panel.

Timing Control (T-CON): Synchronization of panel gate drivers.

D. Audio Section

The audio path consists of a digital-to-analog converter (DAC) feeding into a Class-D amplifier chip.

Amplifier: Common chips include the TPA3110 or TPA3116.

The schematic shows the audio signal path routing from the MCU I2S outputs to the Amp inputs, finally driving the speakers through output filters (inductors and capacitors) to prevent high-frequency noise.

1. Primary AC Input & Rectification (Section A)

Components: Bridge rectifier (usually a D3K or GBU series), fuse (F1), NTC thermistor, and main filter capacitor (large electrolytic, 100-150µF at 400-450V).

What the schematic shows: The AC line enters through a fuse, passes through an EMI filter, and is rectified to pulsating DC. The +300V DC bus is then distributed to the switching transformer.

Common failures: Blown fuse (shorted rectifier diode), bulging main capacitor, or an open NTC.