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1.索尼KV-A1129T80C彩电,开机后,无图、无声出现此类故障时,首先检测各路电压是否正常若开机检测+B、+8 V、+5 V、+3.3 V电压正常,则检测场正/负供电电压是否正常;若正常,则检测HD驱动信号波形和VD+、VD-是否正常;若正常,则说明故障可能出在信号通道或CPU系统控制电路,可检测ICl03(TDA9373PS)輯輩訛~輱輩訛脚的驱动信号是否正常;若无R、C、B驱动信号输出,但测ICl03供电正常,则检查ICl03本身是否有问题;若更换TDA9373PS集成电路后仍无效,则检测ICl03②脚(SCL)、
1. Sony KV-A1129T80C color TV, boot, no picture, silent Such failures, the first test of the voltage is normal if the boot detection + B, +8 V, +5 V, +3.3 V voltage is normal, the test The normal / negative voltage is normal or not; if it is normal, it will detect the waveform of HD drive signal and VD + and VD- are normal; if it is normal, the fault may be in signal channel or CPU system control circuit, detect ICl03 (TDA9373PS) If not R, C, B drive signal output, but the test ICl03 power supply is normal, then check if ICl03 itself is a problem; if the replacement TDA9373PS integrated circuit is still invalid, the test ICl03 ② Foot (SCL),