Look for the AC to DC conversion at the entry point.
Look for version numbers printed on the silk-screen (e.g., V1.0 or V1.1), as component values may change. tpv56pb801 schematic diagram pdf
This monitors the current to ensure the LEDs don't burn out. 3. DC-to-DC Step-Down Converters Look for the AC to DC conversion at the entry point
Are there any like burnt chips or bulging capacitors? V1.0 or V1.1)
Common failure points (look for 450V primary caps). 2. The LED Driver Circuit
This section converts AC mains to the secondary DC voltages needed for the board.
When reviewing the , you should focus on these four primary power and signal stages: 1. The Power Supply Unit (PSU) Stage