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〔故障一〕出现场幅不够,下半部图像正常,而上半部图像压缩,且中间有很窄的一条水平亮带,除此之外,伴音、亮度、色度、对比度皆正常。〔分析与处理〕初判断为场线性不良,仔细检查场输出厚膜集成块7400(TDA3651AQ)周围的电路元件,特别是场线性调整电路元件3401、3408、3409、3421及2407等都正常,调场线性电位器3401,上部场幅有微微拉开,后在电阻3401(阻值为82kΩ)上串接
〔〕 〔A failure of the field is not enough, the second half of the image is normal, while the upper half of the image compression, and the middle of a narrow band with a bright, in addition, sound, brightness, color, contrast are normal. [Analysis and Processing] The initial judgment is that the field linearity is poor. Carefully check the field output circuit elements around the thick film manifold 7400 (TDA3651AQ), especially the field linearity adjustment circuit elements 3401, 3408, 3409, 3421, and 2407, Field linear potentiometer 3401, the upper field amplitude slightly opened, after the resistance 3401 (resistance of 82kΩ) on the series