Two SMPS Saved From Dump
These two SMPS units belonged to the hospital where I work. Complaint was both dead! First I checked the AC Adapter and found that the DC wire had got punctured.
Nevertheless, I opened and checked for any defective components and also did a thorough dry solder patch up on the board.
Then cut off the affected portion and joined the wires taking care to isolate joints with heat shrink sleeves and got the desired output on check-up:
Then fixed it back to its case. This work got completed very easily. So, took up the other SMPS, which was already opened and cleaned by my colleague.
I saw that the SMPS had five bulgy capacitors on the secondary.
After replacing the caps and doing a thorough dry solder patch up on the board, when I checked up, the outputs were ok.
I cleaned and lubricated the SMPS fan too.
Here is a picture of the defective as well as other capacitors replaced as a part of routine maintenance:
Mission accomplished and satisfactions got collected to its bag!
This article was prepared for you by Parasuraman Subramanian from India. He is 72 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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Tayo
January 28, 2022 at 9:15 pm
Well done. Which lubricant do you usually use on the such fans?
Parasuraman S
January 29, 2022 at 12:42 am
Armstrong switch cleaning oil. Many thanks for your comments!
Anwar Shiekh
January 28, 2022 at 9:47 pm
I dislike CapXon capacitors, having replaced too many.
Parasuraman S
January 29, 2022 at 12:43 am
Many thanks for your comments!
Gary Gemmell
January 29, 2022 at 12:29 am
Another bag well filled!
Parasuraman S
January 29, 2022 at 12:07 pm
Many thanks, dear!
Albert van Bemmelen
January 29, 2022 at 2:45 pm
Your pro-deo job for the local hospital is again a money saving job for a very good cause. Luckily this time you didn't have to replace all of the 24 pin secundary power cable wires which you also have done before.
Parasuraman S
January 29, 2022 at 11:56 pm
Many thanks for your keen observations and comments!
Yogesh Panchal
January 29, 2022 at 3:32 pm
Good Fix!Sir
Parasuraman S
January 29, 2022 at 11:56 pm
Many thanks, dear!
Imoudu Onwumah
January 30, 2022 at 6:59 am
Good Good Goooood !!! Thanks for sharing sir.
Parasuraman S
February 2, 2022 at 6:31 am
Many thanks, dear!
Robert Samuel
January 31, 2022 at 10:51 am
Another excellent repair job.
I too do not favour CapXon capacitors.
They almost always fail. So I replace them whenever I see that brand.
Parasuraman S
February 2, 2022 at 6:32 am
Many thanks for your comments and inputs!
Anil Kumar V K
January 31, 2022 at 1:57 pm
Good job sir
Parasuraman S
February 2, 2022 at 6:32 am
Many thanks!
Waleed Rishmawi
January 31, 2022 at 2:35 pm
thanks for sharing your repair success. I never worked on such devices because they are so cheap to buy, they are about 15 dollars worth so no one brings it for repair unless they have the bigger and more expensive computer power supplies.
PS: I have exactly the same power tester and I just love it. I used it to test the power but never bothered to get it fixed. have a blessed day my friend.
Parasuraman S
February 2, 2022 at 6:33 am
Many thanks for your comments and inputs, dear friend! It helps me roll on!