Haier TV Repair Technology Explanation; TC-2125C TV No Brightness Signal
Fault Phenomenon: No brightness signal.
Fault-Related Circuit: Peripheral circuit of N101 (LA7680).
Fault Location: Open circuit at D201.
Analysis and Repair: The voltages at pins 35, 36, 37, 38, and 24 of N101 (LA7680) were measured to be normal. Using an oscilloscope, it was observed that there was no brightness signal at pin 38 of N101, but the test point X6 had a video television signal. R201 was measured as normal, leading to suspicion of a problem with D201. Upon removing and measuring D201, it was found to be open-circuited. After replacing D201 (LC0026), the TV image returned to normal.
Article Source: http://blog.sina.com.cn/haixindianshi.