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[SOLVED] APC AP1250 low charging

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poweraces

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any know/have a circuit diagram for APC AP1250 ( Smart-UPS ), we have a low charging voltage issue here, charging Voltage 17.67Vdc instead of 27.40Vdc...
 

thanks pradeep, 1 ic is faulty and also a resistor connected to that IC is open...after replacing the two component. Charging voltage back to normal.
 

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