LG rear-projection RT-44A10 boot image sometimes trouble-free maintenance examples - appliance repair - Database & Sql Blog Articles

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The LG rear-projection RT-44A10 malfunction is sometimes when the image is turned on. When there is an image, the contrast brightness changes greatly, and when the image is dark, the field is not synchronized. After 10 or 20 minutes of booting, the image slowly becomes better, but the contrast is still not enough. The effect of inputting the AV signal is the same. So I used a hot air blower to heat the AV board and the image returned to normal. The fault is determined on the AV board, and after being cooled, the AV board is locally heated by a hot air blower. When heated to the vicinity of the AV board IC 202, the image appears, and the hotter the image, the brighter the image. Make sure the fault is near IC202, watch carefully and there are no signs of moisture. I think that in the past, the LG rear-projection convergence plate encountered such an upright short-leg electrolytic capacitor is very easy to break. I used a soldering iron to heat the capacitors one by one. When heated to VC202 (10U) this capacitor, the image becomes better, the measurement is taken off, there is no capacity. Replace a common electrolytic capacitor for troubleshooting.