Burst Capacitor And Dry Solder Found In ZEBRONICS ZEB 450W SMPS
This SMPS was brought dead and after opening and cleaning it, observed that there was a burst capacitor on the secondary side, and a lot of dry solders.
As the ESR of the two tank capacitors, 330uF/200V were out of range, removed and on checking, look at the readings that I found:
Replaced the two caps and also completed retouching all the solder points on the board. I normally start from the AC input section and follow the patch until I reach the last point on the board.
Usually I complete this work within about 30 minutes or even lesser sometimes. Look at the shine on the PCB after thorough cleaning, dry solder patch up and another cleaning for removing the flux.
The SMPS was tested and found to be working perfectly fine, and fit back!
I usually use disposable paper cups for storing the screws and cut leads of components.
Another job added to my satisfaction BAG with a ‘bang!’
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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