Faliure EP5: Dr.Meter HY1803D Attempted Repair

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Faliure EP5: Dr.Meter HY1803D Attempted Repair

DESCRIPTION

Today I attempted to repair my DR.Meter HY1803 variable voltage power supply which had a little accident with a lead acid battery. I completely dissembled it, tested nearly every capacitor, diode, and transistor on the board until I came across the filter cap which appeared to have gone bad. According to my NEWCASON capacitance meter it was reading double the capacitance it should have been. Unfortunately I do not have a 50V 4700uf cap on hand so I will have to wait till next week to finish the repair.

$2 2N3055 Transistors: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575159861&toolid=10001&campid=5337833996&customid=&icep_item=191674086858&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

50V 4700uf caps: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575159861&toolid=10001&campid=5337833996&customid=&icep_item=271930131927&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

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