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[例1]机型:福日HFC-1824R型彩电故障现象:开机通电后,光栅、图像很淡,将对比度电位器开至最大,也无改变,其他功能正常。分析与检修:通过开大对比度电位器,光栅、图像淡的现象仍无改变的情况分析,故障很可能出在对比度控制电路,应着重检查这部分电路。对比度控制电路由IC501“#!?
[Example 1] Model: Fu-HFC-1824R-type TV Fault phenomenon: power on, the grating, the image is very light, the contrast potentiometer open to the maximum, no change, the other functions are normal. Analysis and overhaul: By opening a large contrast potentiometer, grating, light image phenomenon still no change analysis, the fault is likely to be in the contrast control circuit, should focus on checking this part of the circuit. Contrast control circuit by IC501 ”# !?