SMD Resistor Found Burnt And Displaced In Enhance SMPS Model SFX-200D
This was one among the five SMPS brought from my hospital, where I work (now from home only). As the IT-Administrator had already cleaned the inside of this SMPS, it saved my time in doing it. I saw a lot of dry solders and one SMD capacitor lying loose besides the vertically fit PCB.
When I checked the cap next to it, following was the reading:
Anyhow, I replaced all the electrolytic capacitors on the board as a routine maintenance.
As I could not get the correct sized Tank Capacitors, I fit these two a little elevated for accommodation and tied it up to the heat zinc.
The vertical board (control IC) had a lot of dry solder on the SMD components. So, I retouched all of them apart from cleaning and re-fixing the SMD resistor, which was found ok on testing.
(I had clear snap of this board in yet another work done earlier on a similar SMPS and confirmed the value of it from there)
I retouched the board thoroughly with fresh solder and re-fixed the vertical PCB.
The SMPS worked very well on test. So fixed the cover and moved it for pick up by hospital staff.
Mission accomplished and satisfaction jumped into the collection bag with a bang! (LOL)
Following components decided to call it a day and gave pose before moving out (LOL).
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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