Suoer DVD Player No Power Repaired
The complaint of this Suoer DVD Player was no power and the first thing to do is to remove the cover and check on the switch mode power supply.
Upon visual inspection I found that the main fuse was blown and checking it with multimeter (just to show you how is the reading of an open fuse) shown “1”.
There must be a reason why the fuse blown so badly (dark in color). This could mean there was a severe shorted components in the power supply. The first component after the fuse was the bridge rectifier. Some design came in a package form and some has 4 individual diodes. In this power supply design, it was using the 4 individual diodes and when I checked all the diodes with my multimeter I found all of them were shorted. Sometimes it can be only one or two diodes shorted.
The next test was to check on the big fat capacitor and surprisingly this capacitor also have problem. The internal electrolyte spilled out at the bottom as you can see from the photo below:
I proceeded to check on the power transistor (13005=MJE13005) and it was shorted too. Checking the corresponding components found another transistor shorted (C945).
In total there were 8 components that were shorted or bad ( including the main fuse)- see the photo below:
After the replacement with the new components I tested the power supply with a 40 watt light bulb that was connected across the main fuse. It went dim and this was a good sign to put in the fuse and power On.
Below is the connector with all the output voltages marking and from the voltmeter test, all output voltages were within range.
Fixing back the power supply and the DVD player worked like a new set. If you wish to test electronic components, you can go to this website and if you wish to learn how to fix DVD player you can visit this website.
All the best
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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Note: You may check out his previous repair article in the below link:
https://www.jestineyong.com/singer-32-skyworth-led-tv-with-dim-display-repair/
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Albert van Bemmelen
November 27, 2015 at 11:43 pm
Nice repair Mr.Suranga! Thanks for the article.
Albert Hoekman, Holland
November 28, 2015 at 12:42 am
Nice job and well explained!
Randy
November 28, 2015 at 1:01 am
I guess that is what is called a "catastrophic" failure, this is what you get with cheap Chinese parts. For whatever reason, Chinese parts are just so much more failure-prone, why is that?
Paris Azis
November 28, 2015 at 1:02 am
Good job Suranga.
Greetings!
Robert Calk
November 28, 2015 at 1:51 am
Good repair, Suranga.
Hicham
November 28, 2015 at 5:42 am
Hi Suranga Bandara,
very good repair technics your passive mode quickly find-out the bad components; congratulations.
Bonkie
November 28, 2015 at 7:05 am
I admire your and all others on this website repairing skills.
I read all the repair articles
One question, whats the different outcome of a 40 watt or 100 watt lightbulb for testing?
Parasuraman S
November 28, 2015 at 9:55 am
The selection of wattage of bulb depends on the wattage of the SMPS. For DVD, the power dissipation is low and you need to connect only a 40W Bulb, especially when you are checking the SMPS without connecting any load. But for CRT TV and other more power consuming devices, you may have to use a 100W bulb, without which it might misguide you.
Bonkie
December 1, 2015 at 12:54 am
Alright i get it, thanks.
Suranga Electronics
November 28, 2015 at 2:44 pm
100W Bulb's Filament is thin and break faster and this is why I use 40 watt bulb which has a thicker filament.
Parasuraman S
November 28, 2015 at 9:51 am
Nice work and very detailed write up! Well done! All the best!
Ulises Aguilar Pazzani
November 28, 2015 at 11:18 am
good Job
James
November 28, 2015 at 3:22 pm
Dear Suranga,
My thanks and compliments to you for preparing and sharing this very nicely written article.
It is good that you can find a machine whose failure has involved almost all types of commonly failed components in the Primary stage of the SMPS section. Your clear, step-by-step explanation and photos of each component's testing and results is an excellent approach enable the readers (even newbies) to clearly learn the skills.
I seldom see repair article covering the Optic Coupler or the Transformer(s) in the SMPS. It would be nice if you can write some articles on these components (covering their failure symtoms etc.) in future.
Thanks again for sharing this great article!
James
مجید
November 29, 2015 at 1:18 am
thanks Mr Suranga
majid
November 29, 2015 at 1:40 am
Nice work and very detailed write up! Well done! All the best!
David
November 30, 2015 at 2:23 am
good repair article God bless u and increase your knowledge.
Mangala
November 30, 2015 at 12:36 pm
Good job and clearly explained. Thanks for sharing.
Yogesh Panchal
November 30, 2015 at 3:26 pm
Good job! Suranga
Andre Gopee
December 1, 2015 at 2:06 am
Good Repair Job. Keep them coming.
Wil
December 4, 2015 at 2:35 am
Suranga, I'm new to repairing electronics, so please forgive my beginner's question: did you load up the repaired SMPS by just connecting it back up to the DVD player, or did you put some kind of other artificial load on the SMPS? Thanks, Wil
Geoffrey
March 19, 2016 at 8:23 pm
Hi Mr Jestine young.
Now am missing your electronics updates.
Anything wrong?
Jestine Yong
March 20, 2016 at 3:47 pm
Hi Geoffrey,
Your email is still in my database. Try check the junk mail as it can landed there. Nowadays Yahoo block many kind of emails.
Jestine