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(4)工作于TV显示模式时,数字板上的微处理器UNll(M37227)的⑧脚(SW)为高电平,经连接器JN01/XSll的①脚和连接器XP803/XS853的SW脚使电源板上的VQ850导通,致使VQ851导通,此时R852两端阻值达到最小,它与R834串联后,使升压电阻的阻值变小,导致NQ833的①脚输入的电压升高,经NQ833内部电路处理后,使NQ838的②脚电位降低,NQ838内发光管因
(4) When operating in the TV display mode, the ⑧ pin (SW) of the microprocessor UNll (M37227) on the digital board is high level and is connected to the SW pin of the connector JN01 / XS11 and the connector of the XP803 / XS853 So that the VQ850 on the power supply board turned on, resulting in VQ851 conduction, then R852 at both ends of the resistance to a minimum, it is connected in series with the R834, so that the resistance of the step-down resistor becomes smaller, resulting in NQ833 ① pin input voltage increases , After the NQ833 internal circuit processing, so that the NQ838 ② feet potential reduction, NQ838 LED