Dry Solder Caused Foxin Computer SMPS To Go Dead
MODEL AND MAKE: Foxin FPS 500C ATX Power supply of Computer
COMPLAINT REPORTED: No output
TROUBLE SHOOTING AND RECTIFICATION DONE: As the IT maintenance guy at the hospital had already done the preliminary cleaning, it saved my work. I removed the board, did some fine cleaning. Observed a lot of dry solder on the board. Checked for any bulgy caps or strained components. Could not find any. ESR checking of all caps was well within the limits. Ring testing of the SMPS showed healthy too. So I did retouch of all the points on the board, cleaned it up thoroughly using IPA and looked for any man-made shorts. As everything looked very positive, shorted the green and black at the socket, connected the Fan and applied power.
I was glad to see the fan running but with noise and jerks. So removed the fan, cleaned it thoroughly, opened the cap and applied a couple of drops of oil and closed the sticker cap. Then when I retried, it was very smooth and no noise too! Connected my Power Supply Tester and got a full certifying result! Mission accomplished without any complications, but satisfaction never hesitated to jump into its collection bag!
HERE A FEW PICTURES FOR THE EYES:
This article was prepared for you by Parasuraman Subramanian from India. He is 70 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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