论文部分内容阅读
接修一台天鹅CS49——C1(NC—Ⅱ机芯)遥控彩电,送修前经他人修理过。据用户讲:“开始只烧保险,修理后看两天便出现三无故障,经查发现为行管击穿,更换后看半小时行管又击穿,连续换了几个都如此,后来又将电源厚膜块(IX0689)、行输出变压器更换过,最后说显像管坏了,修不上”。看来前修理员没有查出烧“行管”的真正原因,只是盲目的换件,打开电视机,抽出主板一看IC701(IX0689)已换成分立元件厚膜块,在看背面,电源板处已是面目全非,铜铂多处断开,都
Pick up a Swan CS49 - C1 (NC - Ⅱ movement) remote control color TV, repaired by others before delivery repair. According to the user said: “Start burning only insurance, after two days of repair there will be three no trouble, the inspection found to be in charge of breakdown, after half an hour to see the changeover and breakdown, continuous for a few are so, and later In turn the power thick film block (IX0689), the line output transformer replaced, and finally said the CRT is broken, repair not on. ” It seems the former repairman did not find the burning “governed” the real reason, but blindly for the pieces, turn on the TV, remove the motherboard to see the IC701 (IX0689) has been replaced by discrete components thick film block, looking at the back, power board Department has been beyond recognition, copper and platinum off in many places, all