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机型:高路华TC—2981 故障现象:无光、无声。检修方法:据机主讲,此机是受雷击后损坏。经查为电源受损,修后伴音、图像都有,但却出现另外一怪故障,只能接收L频段的节目,而H和U段不能接收,自动搜索时无频段显示,中文字符全变为英文,原机只有一路AV,但现在按AV转换键屏幕依次显示AV1、AV2、S—VHS。该机所用CPU为TMP87PM36N,存贮器为AT24C02,据有关资料获悉,存贮器数据改变所致,多方查找资料未能找到进入I~2C总线调整的方法,决定另想办法将该机修复,方法如下: 先找一相同的机子,预备一空存贮器,将空存贮器依管脚按压在好机子的存贮器上面(装上集成块插
Model: Gao Hua TC-2981 Symptom: No light, no sound. Maintenance methods: According to the machine speaker, this machine is damaged by lightning. After the investigation for the power supply damage, after repair sound, the image has, but there is another strange fault, can only receive L-band programs, and H and U can not receive, automatic search without band display, all Chinese characters change English, the original machine only one AV, but now press the AV conversion key screen followed by AV1, AV2, S-VHS. This machine uses the CPU TMP87PM36N, memory AT24C02, according to the information was informed that the memory data changes caused by multi-party find the information failed to find ways to enter the I ~ 2C bus adjustment decided to think of another way to repair the machine, The method is as follows: First find a same loom, prepare an empty memory, press the empty memory according to the pin on the good machine’s memory above