A level of bright line fault is caused by the field scanning circuit fault. Games such as oscillation, IC701 driving circuit and its peripheral components; IC681 field output circuit and peripheral components, the double power source output power supply circuit, etc. TRaservice manual download site
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(1) the first check switch S501 position at work. Check the deflection coil, good contact. TRaservice manual download site
(2) measurement field output integration IC681 each foot working voltage, found that 10 feet rising voltage from 0.5 V to 4.5 V, shows that the integrated chip OTL output tube under eb junction has been open. TRaservice manual download site
(3) remove the IC681 measuring resistance, has been further confirmed. Check the attending foot peripheral components, found that the capacitance C683 serious leakage, thus potential rise to 10 feet. TRaservice manual download site
Everything is back to normal after replacing IC681, C683.TRaservice manual download site