DENON DBT-1713UD BLU RAY PLAYER- Power Supply Problem Rectified
Recently, I attended the Mr. Jestine Yong’s Basic and Advanced Electronics Repair Courses to refresh my basic knowledge that I earned in 90’s as an electronics hobbyist.
With the refreshing mind to repair stuff, I got this Denon DBT-1713UD which could not power up. (understand the brand new unit was being sold at about US$500 a few years back).
With a hope to apply my troubleshooting techniques learnt from Mr. Jestine’s class,
1. I opened up the unit and found the boards are very clean without any visible burnt marks, bulging caps etc on the SMPS board. Checked the fuse and found it to be in good order.
2. Removed the SMPS board and had a general look first on both sides. Connected the power supply to the SMPS and checked the voltage at main filter cap and final output terminals first.
The voltage on main filter cap terminals was good but the voltages at output terminals were not in order.
3. Before proceeding checking other components, had a close look at the back of the board and found that a little discoloration (which was not so visible during general look) in way of fast recovery and transient suppression voltage diodes.
Suspected to be faulty, checked both the diodes using DMM and found to be shorted.
4. After replacing the two diodes, Conducted voltage checks and found them to be in order. Hooked it back and switched ON the power. Wow! Power is back.
5. Played a blu ray disc and found both video and audio are working fine.
Wow!!!. The blu ray player is working flawlessly. I am so happy that I am able to apply my learnings on SMPS repairs from Mr. Jestine’s class.
Thanks much Mr Jestine. You are The Great Guru.
This article was prepared and shared by Raj, an electronics hobbyist from Singapore. He has done Masters in Industrial Safety Engineering and Degree in Mechanical Engineering. Currently, he is working as a Safety Professional in Singapore. Although he is with mechanical background, his hobby is on consumer electronics stuffs especially on home theatre systems, amplifiers and speakers.
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Albert van Bemmelen
October 2, 2019 at 9:22 pm
Glad to see you were able to fix your Denon Bluray player! Denon indeed is a more expensive brand. The mentioned P6KPE160A protection diode is often the reason a device no longer works. If we leave them out the device most likely works fine again but is no longer protected against over-voltages and very short dangerous input power mains AC fluctuations. It happened in one of my older repairs that also used that same diode of which the device also worked fine after just removing that single component. These diodes are great in sparing the life of other more expensive electronic components.
October 3, 2019 at 11:38 am
Yes, this tiny component plays a key part in saving other components.. thanks
October 2, 2019 at 9:49 pm
Welcome to our world! Very, very glad to see a student of Jestine Yong, himself is writing an article in this forum! Added to it is the fact that you applied what you learnt there and achieved the results! That's good! Congratulations and all the very best!
October 3, 2019 at 11:36 am
Thanks much Sir,
I read your repair articles regularly.
October 2, 2019 at 10:34 pm
Nice job in finding the problem. As stated in an earlier post great to see what you learned in Mr. Yong's classes. Wish I could attend one. I do this as a Ham operator and fun of tinkering with electronics. I have learned a great deal from what the experienced technicians as well as a couple of books from this site. Thank you for posting your repair and sharing your experience.
October 3, 2019 at 11:55 pm
Thanks much..Yes, you should attend to learn a lot.
Justice (City of Durban --South Africa)
October 2, 2019 at 11:22 pm
Hi Raj. Great to here from you although you too are a Guru in mechanical field but so happy to notice your interest in electronics. I hope one day you will be reading my article. Keep posting more of your electronic experiences.
October 4, 2019 at 7:17 am
October 3, 2019 at 2:26 am
Great article Mr. Raj. I too am a mechanical engineer studying electronics repair as a hobby. I look forward to more articles from you. Regards.
October 4, 2019 at 7:19 am
Bingo!!... Yes, will try to post more articles.. thanks
Robert Calk Jr.
October 3, 2019 at 7:06 am
Good job, Raj! Welcome to the blog!
October 4, 2019 at 7:20 am
Happy to join with you all.
Henrique J. G. Ulbrich
October 4, 2019 at 6:26 am
Welcome, Raj. It´s very good to know a new colleague.
Perhaps there´s a mistake with the spelling of the P6KPE160A diode - I didn´t succeed in finding them at Google. The search address only to this present article. What would it be the right spelling?
October 4, 2019 at 3:43 pm
This number is listed inside the datasheet
October 6, 2019 at 11:02 am
Yes, part number is correct. I bought the new one from a local shop at Sim Lim Tower, Singapore
October 15, 2019 at 3:50 am
great presentation your work was very successful for me.
January 11, 2021 at 12:36 pm
Wow! Worked like a charm for me!
Marantz speaking again!
You save my day!