According to the scope of preliminary judgment fault phenomenon in public channel part of the image, because the machine purchase soon appeared the fault, so components belonging to poor contact or a circuit to poor performance of possibility is very large. S6Jservice manual download site
 S6Jservice manual download site
 S6Jservice manual download site
First into self-check state found self-checking result shows that the tuner is not normal, measure the main tuning each foot voltage found that SCL, SDA two cable when the SDA data line voltage, a voltage when receiving TV show is normal, the point at which a ground resistance measurement didn't find leakage phenomenon, change the high frequency head image is normal, about a few hours after commissioning and appear the same fault, self-check display or the tuner is not normal, to test the two wires found SDA voltage instability, examination revealed L002 (2.2) resistance larger and instability, replace L002 troubleshooting. S6Jservice manual download site
 S6Jservice manual download site
Check the fault using the self-check function can quickly find the fault part, but need to pay attention to not simply change according to defective parts, also check the parts related circuit, especially pay attention to the parts have bus interface circuit, the interface is not normal self-checking shows the same parts are not normal.S6Jservice manual download site