3100信号时有时无终极维修!!!

hghangel

普通会员
2007-03-13
103
0
0
一部3100手机无信号,加焊中频就好了,过一段时间就又没信号,再加焊又好了!!

故障分析:间歇性无信号,且加焊中频就好,有可能是中频的稳定性不好引起,
F3,F5,F7中频是通用的,重直CPU,不行电源IC重直。OK有¥收了
 

韦石通讯

普通会员
2006-10-16
2
0
0
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