海信电视故障维修实例速查表

海信电视故障维修实例速查表

海信电视故障维修实例速查表

机型故障现象故障位号原因简析 :
                        TB1238机芯 
                        TC2900不定时无伴音C253N201#56脚伴音调频去加重滤波电解失效 
                        TC25100搜台不记忆N201小信号集成电路内部AFT电路异常 
                        TC2900水平亮线L410枕校电路无工作电压，造成无场激励信号输出 
                        TC2975L枕形失真VD404枕校信号无法调制行扫描电路 
                        ★TC2500水平亮线VD571H.Vcc供电异常，导致场电路不工作 
                        TC2588三无，灯亮N201N201＃27脚总线电压异常 
                        ★TC2588A枕形失真C422枕校信号输出异常 
                        TF2988G左声道无伴音NC01伴音功放集成电路不良 
                        TC25109无伴音V102射随三极管性能不良 
                        TC2589AD场幅小，图抖R569H.Vcc供电电压低，导致场电路工作异常 
                        A12机芯 
                        TC2102G三无，灯亮C904加速极电压异常 
                        TC2540A光栅底部黑线干扰，行叫C237ABL电路滤波电解失效 
                        TC1410L无信号L10138M压控振荡器失谐 
                        TC2199D三无VD635伴音供电输出电路负载短路，导致电源停振 
                        TC2199D不定时烧行管C434行推动级滤波电解失效 
                        TC2199D蓝屏为淡绿屏C227N201＃15脚绿字符信号输入异常 
                        TC2598L三无，灯亮V551无26V电压输出，导致行电路工作异常 
                        A6机芯 
                        TC2539三无，灯亮R797加速极电压异常导致保护电路动作 
                        TC2511C自动关机VD635伴音供电电压无输出，导致保护电路动作 
                        ★TC2165图像抖动V653小信号处理集成电路供电异常 
                        胶片机芯 
                        DP2999机内吱吱响C806300V滤波电解性能不良 
                        TDF2988子画面部分台无彩色VH04射极跟随器性能不良 
                        TB1251机芯 
                        TC3488D重影、色闪XS1103后AV板松动 
                        TC3488D伴音影响图像VD516续流二极管性能不良 
                        TDA884X机芯 
                        TC3418DF无图像，行频叫C407、C408行AFC-I电路滤波不良 
                        TC2975GF三无C612伴音供电电路滤波电解失效