Bed Recliner Board Repaired
A regular customer gave me a call about a control board that is used for a bed recliner in a nursing home nearby. He said the board is not working and needed an urgent repair.
The customer who is my cousin made an attempt to repair the board himself but was not successful because he is not a technician.
He brought the board to be repaired in my shop and as I said before it was an urgent needed repair.
The board was completely dead and no sign of life whatsoever, so I headed to the part where I usually check in such a repair, the fuse.
The fuse (2.50 amps) was open and I do not know what caused the fuse to blow. Was it because of short on board, or just went open.
So I preformed a check on all the parts on that board and I was happy to see all the parts checked just fine.
So I decided to replace the fuse and power on the board through a current limiter and see the outcome. The open fuse that was found on that board was replaced by my cousin earlier so when I asked about the rating of the fuse, it was 3.15 amp not 2.50 amps.
As you can see, the board came on but if you look deeply into the photo, you would see a bright light coming from light bulb on that current limiter. There was also a high humming noise coming out of the main transformer and I was wondering why this was happening.
If you look to the transformer rating, it was 120 AC volts and wow I was so lucky that I powered it through a current limiter otherwise we would have some kind of explosion in my shop.
The customer was in the shop with me the whole time and did not inform me that this transformer runs on 120 AC volts and when I asked him about that he did not know either.
Anyway, to make the story short, the board was up and running because the customer took the board and connected through a 220/110 step down transformer and everything seems to be working fine.
Mission Accomplished.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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Note: You can check his previous article on Cement Vibrator Machine Repair
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Parasuraman S
November 4, 2021 at 1:29 pm
Yes, many of even experts overlook such input voltage requirements. Customers also many times are not aware, especially when they get a gift from abroad! Good fix and accomplishment!
Waleed Rishmawi
November 4, 2021 at 2:48 pm
Parasuraman: yes, recently I have been mistakes like that I need to wake up and do the right job always. have a blessed day my friend.
Albert van Bemmelen
November 4, 2021 at 1:45 pm
Strange that the customer was in a hurry to get a board working that probably never had worked before on the 220VAC in the nursing home. I guess that the current limiting device you used is just a light bulb, or did you use any other electronic device?
Waleed Rishmawi
November 4, 2021 at 2:51 pm
Albert: yes, he was checking the board out but did not put it on a 220 volts outlet which was great. the current limiter that I built here in the shop has a light bulb, main out let and a power switch so I can contorl on and off situations. I put it all on a wooden board and attached it in my shop which looks great as well, have a nice blessed day
Imoudu Onwumah
November 4, 2021 at 11:58 pm
This's an easy fast work, so to say based on your good observation.i can see small green led bulb,not bright light bulb,something like 60w-100w normally use for current limiter.Well done.
Waleed Rishmawi
November 5, 2021 at 6:22 pm
Imoudu: it was an easy repair job. the green light seen in the photo is the light for the device not showing bright because of the current limiter but the actual current limiter is yellowish color coming from the side of the photo. have a blessed day
Babu M S
November 5, 2021 at 12:10 am
It is very good information that any appliance before connecting supply one has to confirm the voltage.Thank you very much for sharing.
Waleed Rishmawi
November 5, 2021 at 6:23 pm
Babu: you are most welcome. I am glad you liked the article. have a blessed day
Aaron Ccostine
November 5, 2021 at 3:56 pm
What type of current limiter is mentioned in this article where to buy thanx.
Waleed Rishmawi
November 5, 2021 at 6:27 pm
Aron: it is something you can build on your own. it consist of an incandescent light bulb, an off/on switch and an outlet. you can look on youtube for that, it is very easy and fun to built. have a blessed day
Abraham Getahun
November 6, 2021 at 7:08 am
Amazing fix! Electronics repair isn't always complicated, a fuse could just blow even still when there's no short circuit in the board.
Waleed Rishmawi
November 6, 2021 at 2:58 pm
Abraham: thanks man. totally agree...have a blessed day
Yogesh Panchal
November 9, 2021 at 9:03 pm
Good Job! waleed