TV Service Repair Manuals - Schematics and Diagrams Here is a Hisense LCD TV Circuit Diagram as an example. When troubleshooting your TV you will need to use schematics and diagrams to find the problem. Flat panel TV Diagram of Internal Parts and Circuit Boards. Note: If your TV has power issues, consider replacing the POWER SUPPLY BOARD. LCD LED TV Power Supply Schematic Diagram - LCD LED TV Power Supply Schematic Diagram. And then click on the right hand click you will see a window and then select "Save As" or "Save Link AS", after click select the location you want to save the file into which folder and click ok to save the file. 715G5246-P02-W21-002S_IP PSU with LED Driver Schematic.pdf.