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 | tpv56pb801 schematic diagram exclusive
Repair with confidence. You’ve just unlocked the exclusive secrets of the TPV56PB801. Whether you are fixing the 5VSB standby using
| 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 | | Block | Function | Key Components |
Below is a quick exclusive reference table without the need for the full PDF: