Measuring pillow shaped distortion correction tube Q710 of c very voltage only 2V (normal Shi for 12V around), regulation pillow shaped correction and line site adjustment potentiometer picture are has changes, but correction volume rarely (so Shi pillow shaped correction tube of work voltage only 2V, almost work in saturated), this showed that pillow shaped correction tube yiqian of circuit basic didn't problem, problem out in pillow shaped correction tube yihou of circuit Shang, measuring throwing real wave formed capacitor C758 (50V 4.7 μ f) didn't found problem, Inductance tables of measuring choke coil L754 inductance measured at 50 μ-h, normally should be 350-500 μh, removing all set this inductor line with the same diameter wire and rewound coils, inductance measured after around 370 μh, put on a test machine troubleshooting.