UNI-T Digital Multimeter Faulty From Time Of Purchase
I purchased this uni-t metre model: UT39A+ on January 2020 brand new from a local shop in the city. I did bought it because of its high capacitance mode(Mega/farad) compare to my other meters (suoer,dt9205a) brands that have limited measurement (200 microfarad).
This unit is abnormal, but it can’t repair at your side. If this unit in the warranty year (from purchase date within one year), you can contact with local distributor (you buy from who) for the replacement.
Please let me know if you have any problems, thanks.
Have a nice day.
The local seller don’t take responsibility for such fault, so I was using only the capacitance mode when needed. July 2021, I decided to do something about it, so I opened its back case and tested all testable components on it. I found two smd A4 coded schottky diode were faulty: one is open(DD8) while other one leaky(DD3) (i.e voltage drop erratic).
So ordered for these diodes online and having received them I did the replacement.
See result after replacement below:
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Note: You can read his previous article on Dead DVD Player Repaired