How To Service DP 30 LED Emergency Lamp
This emergency light was brought to me in a dead condition. On opening the unit, I observed that the battery connections were corroded; a few components on the board had burnt. This light uses two 4V cells, which will not have any values or ratings marked on it, except the + and – marks on the top! Needless to say, it is a Chinese make.
One resistor was open and one transistor was found defective. Here are a few snaps:
Since this is one of the products that I deal, I took a new one and opened it to see the values of the resistors.
Replaced these components and cleaned the PCB.
Connected and checked and left it for charging. It worked very well.
Another job added to my satisfaction list, henceforth to be referred to as ‘SL’!
This article was prepared for you by Parasuraman Subramanian from India. He is 69 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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You may check on his previous repair article below: