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[例1]长虹PT4228等离子彩电,打开电源开关指示灯亮,用遥控器开机后,又自动返回到待杌状态。此类故障检查范围为主板及等离子显示屏组件。主要测试点为主板各组输出电压(拔下插座CN8005、CN8007和CN8006,使电源处于自检状态,再在通电瞬间测试各组输出电压)。实际检修中,因采样电阻R8370不良导致VSCAN电压异常而引起此类故障较常见。[例2]长虹PT4228等离子彩电,开机后,屏幕无光。
[Example 1] Changhong PT4228 plasma TV, turn on the power switch indicator light, turn on the remote control, and then automatically return to the pending state. This failure check range for the motherboard and plasma display components. The main test points for each motherboard output voltage (unplug the socket CN8005, CN8007 and CN8006, so that the power in the self-test state, and then test the power output of each group instantaneous voltage). In the actual maintenance, because of the bad sampling resistor R8370 VSCAN voltage caused by such failures are more common. [Example 2] Changhong PT4228 plasma TV, boot, the screen matte.