How To Repair No Power Fault In DVD Player
This DVD player was brought to me with the complaint that it became dead while playing and the customer, being an electrician with half cooked knowledge of electronics, opened the player and having found the fuse blown, bypassed it with a thick wire!
When he switched it on, he heard one explosion and in panic he brought it to me for troubleshooting. When I opened it, I saw what you all can see below:
The IC had blown to pieces because of which there was no way of knowing its number.
Having known the customer’s tendency to do self-service, in a crude way, I dismantled the whole DVD and noticed that this over-smart guy had put a rubber band in place of belt on the loading motor!
Connected boards and tried it out.
It worked very well. So, fit it back.
Here is the picture of defective power supply board, the rubber band, which I replaced with a belt and a cut belt found inside the DVD player.
Thus accomplished in adding another one to my satisfaction list.
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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You may check on his previous repair article below:
https://jestineyong.com/servicing-onkyo-htr-430-av-receiver/
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Audiotekman
August 22, 2018 at 2:58 pm
Nice report on repairing a "self serviced" dvd player but short on specifics. Make and Model numbers, power supply ic, fuse value, would be good to know. How did you know what ic to install if the original is too badly damaged? There appears to be bulging filter capacitor next to the diode array assembly on the switch mode power supply board or is that a photo lens distortion?
No disrespect intended,
Audiotekman
Parasuraman S
August 24, 2018 at 8:45 pm
It was in the heading of the article, but got changed while posting by Jestine Yong. SERVICING FIRST 1 DVD PLAYER, this was the heading given by me. The power supply board was replaced. It is there in the last sentence. But sure, it is vague. Original SMPS board could not be restored, because of the burst IC.
Albert van Bemmelen
August 22, 2018 at 3:20 pm
Parasuraman, did you also replace the power supply by another supply or were you still able to repair it although the original smps controller was unknown after it had blown? The photos are too small and very vague to see any change.
Parasuraman S
August 24, 2018 at 8:46 pm
Yes, The power supply was replaced.
Mikael
August 22, 2018 at 8:45 pm
It seems to me that there is something missing in this repair description.
How was the repair done? Was the PSU-board replaced or were you able to repair the existing board?
Parasuraman S
August 24, 2018 at 8:47 pm
Yes, the Power Supply Board was replaced.
Robert Calk Jr.
August 22, 2018 at 11:25 pm
Lol!! Don't you just love those "natural born" Tech's? I'm glad that you were able to repair it.
Humberto
August 24, 2018 at 12:31 am
Good repair Parasuraman. Congratulations.
Kevin Sissons
August 24, 2018 at 7:59 am
I have the same issue with my DVD player but with no rubberband. There is a slow-blow fuse on the power supply that keeps blowing. I was hoping you'd get into a description of how you fixed the power supply as I'm sure the rubberband would not cause a fuse to blow.
Parasuraman S
August 24, 2018 at 8:48 pm
Please replace the SMPS board, if you are unable to trouble shoot the original board. Jestine Yong's book on SMPS service is a good one to have.
Andre Gopee
August 24, 2018 at 11:16 pm
Nice job Parasuraman. Some people think that they can just replace a blown fuse and it would bring the equipment back to life. They have no experience in knowing what has cause the fuse to blow in the first place and hence do more damage. Thanks for sharing.