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彩电故障有典型故障和疑难故障。典型故障大都出在“特定”部位,一般较易查找;疑难故障大多难以判断其产生原因,不易查找。维修中应视具体问题具体分析。有时,“逆向思维”也可使你独辟蹊径,引你走出“误区”,使问题迎刃而解。 (一)典型故障,逆向分析例一机型:环宇47C—2型彩色电视机故障现象:(1)光栅呈水平一条亮线;(2)无伴音。分析与检修:本机系TA四片机,其故障属典型故障。光栅呈水平一条亮线,说明场扫描电路工作异常;无伴音,说明伴音电路工作异常。从表面现象看,两种
There are typical problems with color TV troubleshooting and troubleshooting. Most of the typical failure in the “specific” parts, generally easier to find; difficult to determine the most difficult to determine the causes, not easy to find. Maintenance should be based on specific issues specific analysis. Sometimes, “reverse thinking” can also make you unique, lead you out of “errors,” so that the problem can be solved. (A) typical failure, reverse analysis Example One model: Universal 47C-2-type color TV Fault phenomenon: (1) the grating is a bright horizontal line; (2) no sound. Analysis and Maintenance: The machine is TA four-chip machine, the fault is a typical failure. Raster level of a bright line, indicating abnormal field scanning circuit; no sound, indicating abnormal sound circuit work. From the surface of the phenomenon, two