Philips TV, image color distortion, where bright red turns into purple and vibrant colors fade. Article source: http://blog.163.com/philips_dianshi88/. Repair Result: The fault was resolved by replacing capacitor C683. Experience Analysis: Based on repair experience, this fault is related to the amplitude and phase of the color signal, as well as the YCM301 brightness and chrominance separation circuit, IC301 main picture demodulation circuit, IC304 one-line delay, IC304 RGB demodulation circuit, and peripheral circuits. First, we tested the voltages in all the above-mentioned circuits and found that the power supply Vcc was slightly lower than the normal value. This working power supply comes from the three-terminal regulator IC683 (7809). Upon inspection, it was discovered that the SMD capacitor C683 was leaking. Due to this leakage, the 12V input voltage at C683 was too low, causing insufficient operating voltage for the aforementioned circuits, resulting in a reduced amplitude of the color signal output.