Repair with confidence. You’ve just unlocked the exclusive secrets of the TPV56PB801.
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. tpv56pb801 schematic diagram exclusive
| 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 | Repair with confidence
| 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 | The TPV56PB801 is one such legendary board