接修一台创维数码8000-2160彩电，故障为黑屏。拆机后看到灯丝亮，听到有高压声，说明行扫描部分正常。测三阴极电压148V正常，调高加速极电压能看到一条亮线，说明场部分有故障
   场块为TDA3653B，测得5、6、9脚均为26V，不正常，更换场块后故障排除。
   附：场块TDA3653B各脚功能
脚数              功能                      电压（V） 
1场激励输入端                 1.3
2                              地                           0
3                              开关电路控制输入端           1.3 
4                             地                            0)
5                             场扫描锯齿信号输出端          13.22 
6                             泵电源输出端                  25
7                             保护作用电压输出端            0.77 
8                             自举电压提升端                5.3
9                             场扫描电源输入端              25