(二)电源供电不良引起的“马赛克”故障维修实践中发现,超级VCD机出现“马赛克”故障,电源不良是其罪魁祸首,特别是采用变压器降压型的电源电路更易出现此类故障,这是由于变压器降压稳压电源,稳压电路简单,适应电压范围较窄,电源电路元件易发热,因此,带负载能力较差。一般可按以下方法进行维修。 (B) the poor power supply caused by the “mosaic” fault repair practice found that super VCD machine “mosaic” failure, bad power is the culprit, especially the use of transformer step-down power supply circuit more prone to such failures, which Is due to the transformer step-down power supply, voltage regulator circuit is simple, to adapt to a narrow voltage range, power circuit components easy to heat, therefore, with less load capacity. Generally can be repaired as follows.