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kang jia cai ba kk t2510 xing cai dian gu zhang jian xiu 4 li
Author(s): 
Pages: 30
Year: Issue:  3
Journal: Family Electronics

Keyword:  色同步黑白图像恢复电路副载波色度分离电路选通电路选通脉冲相位故障检修;
Abstract: <正> 例1 故障现象:刚开机时各频道图声正常,约6分钟后彩色消失,黑白图像伴音正常,按色度键无效。停机20分钟后再开机,故障重复出现。分析检修:本例故障源可能在:1.色度控制电路;2.副载波恢复电路;3.APC自动相位控制电路;4.亮色分离电路;5.色同步选通电路。首先测量色同步选通脉冲TA8759BN第(34)
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