康佳T2983L彩电开机三无，指示灯亮，+B电压只60多伏，是啥问题呀
三无（由电源引起）；
由电源引起的三无故障在实际维修中非常多。首先应断开负载确认是电源部分不正常而引起的故障，然后检修电源。如果保险丝烧断且发黑严重，则应检查是否有短路故障，通常300V滤波电容、消磁电阻和电源开关管损坏较为常见。如无明显短路，则检测300V直流是否正常，不正常则检修300V整流滤波电路，正常则检修开关电源。开关电源故障可分为过高（有些机型电源过高会引起保护性三无）、过低和没有输出三种情况。对于输出电压过高，故障应在稳压控制回路，极少数出在电源开关管和开关变压器。如果输出电压过低，除稳压控制回路外，还应检查正反馈回路以及负载回路与开关变压器。没有电压输出则应重点检查起动电路与正反馈支路以及电源开关管，必要时可断开控制支路以确定振荡电路是否正常，不过此时进行降压检修。除以上所述基本电路外，一些新型电视机电源多采用了许多保护电路，当这些保护电路和保护性元件不良时，也会引起电源故障，这一点应引起注意。
三无（由行部分引起）；
行部分不良引起的三无故障通常分为三种情况：一是行部分没有工作；二是行部分工作不正常引起X射线保护或过压、过流保护以及电流过大时使电源不能正常工作，三是行部分已经工作，但行输出变压器供电形成电路不良而使整机呈现三无。如果电源正常而行部分不工作，首先检查行推动管集电极电压是否正常，正常则重点检查行输出部分，通常确定行输出管正常后检查重点应放在行输出变压器及其外围。如果行推动管集电极电压不正常，首先排除推动极本身故障，然后检修行振荡电路。通常行起动供电电阻开路较为常见。对于保护电路动作所引起的三无，应首先确定是什么保护动作。方法是逐一断开各保护支路予以排除，然后分别检查。对X射线保护或过压保护应重点检查行频是否过 低和行逆程电容是否变小，对过流保护或电流过大使电源不能正常工作应重点检查行输出变压器和其负载电路。至于行部分已经工作而三无的情况则比较简单，主要是检查高压、中压和低压供电电路是否正常以及灯丝供电是否正常。通常把这种情况称为“黑屏”。
高分找康佳彩霸Ｔ３４６６Ｃ三位机型
康佳彩电遥控器适应机型表 康佳彩电遥控器适应机型表 序号用户遥控器型号彩电机型 1KK-Y01 (Y02) (Y07) (Y58)T920D, T920DI, T953F, T953P, T953P1, T953P2, T953P3, T953S, T1726, T1826, T1926, T2010, T2028, T2109, T2109A, T2110, T2112, T2114, T2119, T2119B, T2121, T2121B, T2126, T2128, T2129, T5401A, T5401B, T5402A, T5466K2, T5467N2,T5471K, T5472K 2KK-Y04 (Y80)T928N, T971A, T2106, T2506, T2510B,T2510N, T2512A, T2512B, T2512N, T2806, T2806A, T2808, T2910A, T2910N, T2916A, T2986A, T2983A, T2986N, T3828, T7464P4 3KK-Y05T918A, T918B, T920C, T920B, T920C1, T926A, T2107, T2113A, T2115A T2115B, T2115B2, T2115F, T2517B, T5438G1 4KK-Y25T2988P, T3488P 5KK-Y52 (Y17) (Y80)T963A, T2001, T2003, T2004, T2107, T2101, T2102, T2103, T2104, T2105, T2108, T2111, T2111A, T2113, T2113A, T2115, T2115A, T2115B, T2116, T2118, T2118A, T2120, T2516, T2156, T2517, T2528, T2528C, T2528S, T5438G1 T9421 6KK-Y55 (Y84) (Y15) (Y16)T953S3, T1997, T2108, T2027, T2126A, T2128A, F2135E, T2138, T2138A T2138A2, T2138D, T3737D1, T3731E, T4432E2, T4733E, T4934D, T4934E4, T5143E, T5428D, T5428E, T5429, T5429D, T5429E, T5431, T5435, T5441E, T5442E, T5445D, T5445E, T2530D 7KK-Y60T2588X, T2588X2 8KK-Y62 (Y103) (Y104) (Y86)T2517X2, T2588B, T2588X2, T2588X6, T2977B, T2977X ,T2978B , T2978X, T2979X ,T2979X1 ,T2983X, T2986B ,T2986X ,T2987B ,T2987X, T2987X3, T2989X, T3487 9KK-Y72T2131G, T2132G, T2133B, T2133G, T2135G 10KK-Y98 (Y62,Y103)K2989E,K2989F,T2989X 11KK-Y78T2136B, T5471B, T5471B1, T5475B 12KK-Y84 (Y85)T2530D, F2530D/G, T2517D, T2518D, T2519D, T2519D1, F2519D/G F2520D, F2520D/G, T2530D, T2530D1, T2979D 13KK-Y86 (Y68,Y104,Y103)T3472B, T3472B1, T3477B, T3477B1, T3487B, T3487B1 14KK-Y93 (Y55)K248C2, K148D2, K148E2, K1998C, K2038F, K2127, K2129F2 15KK-Y97P2992N, P2993N, P3492N, T2998N, T2998NI, T2998ND, T3888ND, T3488N, T3888NI 16KK-Y100F2977D, F2977D/G, F2979D, F2979D/G, T2977D1, T2979D1, T2986D1 17KK-Y103(Y104)T2588N, T2983N, T2989N ,T2989NI, T3477N 18KK-Y107CT2528D, F2519D1, F2582D, F2587D1/G, K2589D, T2519D2, T2582D T2587D, T2589D 19KK-Y123A2986, A2991 ,A2911, P2901, P2999ID, P3492ID, T2912, T2999, T3498 ,T3498ID, T3898 20KK-Y125(Y160)T2587L, T2983L, T2985L, T2988L, T2989L, T2990L, T2991L, T2991L1 21KK-Y131A1486E/G, A1488E/G, A1448N, KA1486H, KA1488H, K2139H,T2109N T2139N 22KK-Y132 (Y102,Y113,Y119)T2528H, T2583H, T2583H1, T2587H, T2588H, T2985H, T2989H, T2991H, T2983H, T2988H, T2991H1 23KK-Y96(Y132)T2528H, T2583H, T2583H1, T2587H 24KK-Y133T3289W, T3289W1 25KK-Y141 (Y100,Y112,Y170)F953D/G, F2131D/G, F2132D/G, F2135D, F2135D/G, F2137D2, F2139D, F2139D2, F2518D, F2586D, F2528D, F2531D/G, F5428D/G, F5429D/GT953D, T1437D2/G, T2131D,T2132D, T2133D, T2135D, T2136D, T2137D2, T2139D, T2580D,T2586D, T3731D1, T5428D1, T5445D1
康佳T2983L彩电开机三无，指示灯亮，+B电压只60多伏，是啥问题呀、康佳T2983L电视行抖动维修，就介绍到这里啦！感谢大家的阅读！希望能够对大家有所帮助！