[b][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri] 42E800A-8S01-[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]图像有横线且偏红。开机图像横线干扰且偏红，声音正常。怀疑排阻有异常，检查未发现问题。打算补焊主芯片，还是测量主芯片供电是否正常。当测量[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri]U3/LD1117[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]时，输入[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri]5V[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]正常，输出只有[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri]1.6V[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]，与标称值[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri]2.5V[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]偏低，测量对地阻值无短路，决定换新块，试机电压[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri]2.5V[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]正常，图像也正常了，老化[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=Calibri]OK[/font][/color][/backcolor][/size][size=font-size:10.5pt,10.5pt][backcolor=white][color=blue][font=宋体]。[/font][/color][/backcolor][/size][/b]
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