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1.对于采用LA7680单片小信号处理块和行扫描振荡信号采用分频技术的机子,最容易出现的故障部位是:晶振不良,导致行频偏移造成无行振荡信号输出或行停振或因行激励不足而屡烧行管。 2.对于行逆程电容采用一个容量较大的C435(6200pF/1.6kV)和一个容量较小的C436(470pF/3kV)电容相并联的机子。如果其中一只特别是C435漏电容量减小或失效时,会使行逆程时间变短,造成高压过高、跳火而损坏元件。 3.对于视放板视放管集电极供电
1. The use of LA7680 single-chip small signal processing block and the line scan oscillation signal frequency using the machine, the most prone to failure are: poor crystal oscillator, resulting in line frequency offset caused by no oscillation signal output or line stop vibration or Incentive due to lack of incentives and repeatedly burned. 2. For the lineback capacitor, use a larger capacity C435 (6200pF / 1.6kV) and a smaller capacity C436 (470pF / 3kV) capacitor connected in parallel. If one of the C435 especially when the leakage capacitance decreases or fails, will make the line reverse time shorter, resulting in high pressure, flashover damage components. 3. For the board as the release tube collector power supply