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用三端稳压器W 317代换12脚稳压器WA715,注意控制信号的相位逻辑要正确。恰当的元器件代换可使751G分光光度计等日渐陈旧的贵重分析仪器起死回生。
Replace the 12-pin regulator WA715 with a three-terminal regulator, W 317, and note that the phase logic for the control signal is correct. Appropriate replacement of components can make 751G spectrophotometer and other aging precious analytical instruments revived.