Fault phenomenon: When the AV has no signal blue screen, the screen is slightly black from left to right, and the upper part has obvious retrace line. The screen has a light white snowflake point, and the lower grating of the screen has about 3 cm. Storage Electric Water Heater,Electric Water Heates For Showers,Enamel Inner Tank Electric Water Heater,Wall Mounted Storage Water Heater Shandong Sangle Group Co.,Ltd. , https://www.sangle-group.com
Repair process: The original fault of this machine is high-voltage ignition. This fault occurs after the package is changed. The upper part has obvious retrace line and the lower part of the screen has about 3 cm. Because the field is powered by the high voltage package, it is estimated that the field power supply problem, the field power supply 2 feet are 13.5V, 4 feet minus 13V, 6 feet 14.2V, (the drawing is marked plus or minus 15V), lower than the label. On the magnetic side of the high voltage package, each winding is 1 turn, the positive and negative power supply of the field is increased by 1V, the boost diode is replaced, the boosting capacitor is replaced, the fault remains unchanged, and then the screen is left and right, and there seems to be a problem in the line. Block reverse input 34 feet to the high voltage package 4 feet (field negative power supply) components intact. The image sent from the AV2 to the playback is normal (the retrace line disappears, the left and right lights are even, but the field is reduced by about 3 cm), and it is dizzy. . . .
Is it a big chunk of hanging, think about it can be normal image can be no problem, data problems? This sweep line seems to be unable to pull the data, but still wrote a data, after the TV is normal.
November 24, 2022