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标题: k6TCL电视9629BZ型，开机红灯点亮，但呈现三无检修案例84 [打印本页]

作者: wlcv513le73 时间: 2011-10-2 09:45 标题: k6TCL电视9629BZ型，开机红灯点亮，但呈现三无检修案例84

分析与检修；红灯亮，说明电源电路正常，故障可能出在后级电路。测电源板四组输出电压均正常．并且主电压142V已加到行输出管集电极上，只有扫描电路没有正常工作。重点检查行推动电路，测Q411的b极无驱动电压，顺线路检查IC201 (TA8759BN)的39脚输出端电压异常，40 脚没有9V行启动电压。逐一检查9V稳压管D217、滤波电容C231、C230和限流降压电阻R218A，查得行推动电路R218A (0.2kΩ/3W)巳开路。
处理方法：更换R218A后，故障排除。
北京TCL电视售后电话中心2011年9月23日案例。
TCL电视9629BZ型，开机红灯点亮，但呈现三无

作者: lin654321 时间: 2011-10-2 10:42

本帖最后由 lin654321 于 2011-10-2 10:48 编辑

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作者: lin654321 时间: 2011-10-2 10:43

本帖最后由 lin654321 于 2011-10-2 10:49 编辑

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