首先把32V电压改为24V左右,此电源有TL431(2.5A的没有431),找到相关电阻,R49(100K)和r92(360)相当于R1,R50(9.1K)与R68(120K)相当于R2,经过计算输出24V的话R2大约11.669K,把R50和R68焊下用22K和24K换上(相当于11.478K)这样计算电压大约24.35V,改完后空载实际电压24.1--24.3之间(不稳)输出接2K电阻电压24.3V稳定。
其次把输入端的8字插座换为三孔的梅花插座进行接地(参照HP32V 2.5A的接地),此电源感应电压比较高,感应电笔测显示220V,开始没敢改以为是漏电,把Y电容拆了并且把光耦换了,还是有感应电。所以不接地的话造成白光头还是会有感应电。随后就把8字座换为梅花座。
制作改造过程如下:
1 . HP32V 2A电源外观
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2. 拆开换光耦和Y电容(换后还是有感应电,后来又把Y电容器焊上了)
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3.换梅花插座,由于梅花座比8字座长点,安装不下被电感档住了,
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4. 用导线把输出端的“—”和梅花座的“地”焊起来。
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5. 改电压,把R50和R68焊下用22K和24K换上(相当于11.478K)这样计算电压大约24.35V,改完后空载实际电压24.1--24.3之间(不稳)输出接2K电阻电压24.3V稳定。
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6. 改造完毕,合上外壳看看,还不错。
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