(1) the multimeter black pens and (R x 10 Q block, red pens and grounding) touch IC field scanning IC451 (LA7837) 2 feet, watch the screen level light can line up and broadening, if can broadening, shows that a basic normal scanning output circuit. 58 feet measured again IC60l (AN5192K - A) voltage is normal, if normal, check the feet and IC451 2 feet between the relevant circuit device is damaged. 58 abnormal voltage, feet measured again IC601 voltage is lower than 0.7 v, 20 feet shall examine the 20 feet if an external circuit device is damaged, or should be replaced IC601 attempt. It is worth noting that may occur after replacing IC601 image level shift phenomenon, to adjust the maintenance state to adjust the I2C bus data. RTVservice manual download site
 RTVservice manual download site
 RTVservice manual download site
(2) if the screen bright line up and down levels broadening, fault source present scanning output circuit. Check IC451 2, 3 feet in an external circuit device under the premise of normal IC451 was detected in 1, 8 feet of the voltage is normal (normal, in turn, about 12 v, 24 v), abnormal should check if the corresponding pin external power supply circuit of the device is damaged, if peripheral equipments in good condition, should be replaced IC451 try of manifold blocks. RTVservice manual download site
 RTVservice manual download site
(3) measuring IC451 12 feet of midpoint voltage output is normal (normal is about 12.7 v), if normal, check the deflection coil and the presence of open circuit and the series of the coupling capacitance or performance is bad, etc.; If abnormal voltage 12 feet, should check IC45l and 6-12 feet external related circuit device is damaged.RTVservice manual download site