| 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 |
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
Below is a quick exclusive reference table without the need for the full PDF: | Block | Function | Key Components |
| Component | Value/Part | Function | Common Replacement | | :--- | :--- | :--- | :--- | | F901 | T3.15A 250V | AC Fuse | T3.15AL 250V | | IC901 | Viper22A | 5VSB Regulator | VIPer22ADIP | | IC601 | L6562D | PFC Controller | L6562D (ST) | | IC201 | NCP1200 | PWM Controller | NCP1200P60 | | IC701 | OZ964GN | Inverter Controller | OZ964GN (use genuine) | | Q601 | 20N60 (600V, 20A) | PFC MOSFET | FQPF20N60 | | C605 | 100uF 450V | Bulk Capacitor | 120uF 450V (105°C) | | D206 | SB5200 (5A 200V) | 24V Rectifier | SB5200 or MBR5200 | Below is a quick exclusive reference table without
| 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 |
Unlike mass-produced Samsung or Delta power boards, the TPV56PB801 is a proprietary design by (Top Victory Electronics), which manufactures for Philips, AOC, and ViewSonic. TPV rarely releases full service manuals to the public. Most third-party repair databases host only fragmented copies.