Tpv56pb801 Schematic Diagram Exclusive -
The Primary side (hot ground) contains lethal voltages up to 400V DC. Capacitors discharge slowly. Always discharge the large 450V capacitor (C605) with a 10k ohm resistor before probing. The Exclusive Pinout Analysis (Standby Connector CN955) Most "dead TV" faults start here. Without the official diagram, you might confuse the PS-ON and BL-ON lines. Use this exclusive mapping for CN955 (12-pin connector to the main logic board):
Repair with confidence. You’ve just unlocked the exclusive secrets of the TPV56PB801. tpv56pb801 schematic diagram exclusive
In the world of power supply repair and electronics engineering, few components are as simultaneously revered and reviled as the all-in-one power board. The TPV56PB801 is one such legendary board. Found primarily in early-to-mid 2000s LCD televisions—specifically the Philips 42PF5520D, 42PF7420, and several Magnavox and AOC models—this board is a notorious failure point. The Primary side (hot ground) contains lethal voltages
| Pin | Signal Name | Voltage (Idle) | Voltage (Run) | Function | | :--- | :--- | :--- | :--- | :--- | | 1 | 5VSB | 5.1V | 5.1V | Constant Standby Power | | 2 | GND | 0V | 0V | Ground | | 3 | GND | 0V | 0V | Ground | | 4 | 12V | 0V | 12.1V | Audio/Logic supply | | 5 | 12V | 0V | 12.1V | Audio/Logic supply | | 6 | GND | 0V | 0V | Ground | | 7 | 24V | 0V | 24.5V | Backlight Inverter supply | | 8 | 24V | 0V | 24.5V | Backlight Inverter supply | | 9 | GND | 0V | 0V | Ground | | 10 | GND | 0V | 0V | Ground | | 11 | PS-ON (PWR) | 0V | >3V | Power supply enable | | 12 | BL-ON (INV) | 0V | >3V | Backlight enable / Dimming | The Exclusive Pinout Analysis (Standby Connector CN955) Most
Whether you are fixing the 5VSB standby using the Viper22A circuit or hunting down a short in the 24V rectifiers, use this guide as your map. Remember: high voltage is present. Measure twice, solder once.
| Block | Function | Key Components | | :--- | :--- | :--- | | | Filters AC noise; generates 5V Standby (5VSB) | T3.15A fuse, Viper22A (IC901), Transformer T901 | | Main PFC | Boosts DC bus to 380V-400V | L6562D (IC601), Power MOSFET Q601, D601 | | Main Switcher | Produces 12V, 24V for main board & audio | NCP1200 (IC201), Transformer T201 | | Inverter | Drives CCFL backlight tubes (20+ lamps) | OZ964 (IC701), MOSFETs Q701-Q704, High-voltage transformers |
Below is a quick exclusive reference table without the need for the full PDF:
