Panasonic Blue-Ray 3D Disk Player Repaired
My friend Michelle, who owns the Insignia TV that I replaced the RF connector in, brought me this Panasonic Blue-Ray Disk Player Model# DMP-BDT215. All she said about the problem with it was that it stopped working. So I went ahead and opened it up thinking maybe the bridge rectifier (BR) shorted and blew the fuse.
The BR checked good with my DMM onboard, and bad with my Analog meter. So I removed it and some diodes. They checked good off-board. The transformer checked good with my Blue Ring Tester.
A couple of e-caps tested a little off with my ESR meter, so I pulled them and they tested good off-board. I tested them for a short and capacitance as well as the ESR. I couldn’t find anything wrong with the Disk player; everything looked and checked fine. I was impressed with Panasonic also because the components look very good, as well as the PCB’s. The soldering on the boards looks outstanding.
Then I thought, maybe I’m not being told the whole truth. So I started inspecting all of the connectors and look at what I found…
There were also 2 pins on the very end of that connector that were touching each other. Pins 22 & 23 – pin 23 was bent over onto 22 (I forgot to take a picture of them before I straightened them). I was afraid that pin 23 would break if I bent it back to take a picture and then straightened it up again, so I left it alone. You can see in the pictures that they have been bent up. It just happens that the last pin on the connector, pin 23, is the Stand-by power pin and pin 22 is one of the ground pins. So the power to the stand-by circuit was being shorted to ground!
That’s why it wouldn’t turn on! Evidently someone had been inside this Disk Player and bent the pins putting it back together. I went ahead and reseated all of the other connectors, checking for more bent pins. They all looked good. I also went ahead and reseated the flex ribbon connectors.
Success!! The Disk Player is working great now! I’m half way through my second movie and it’s working like a brand new one. She will be very happy to know it is fixed!
My name is Robert Calk Jr. I’m a Hobbyist from Texas USA and I love learning electronics and device repair.
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
(200)Dislikes
(2)
35 Comments
Leave a Reply
beh
August 6, 2014 at 1:22 pm
HI Robert my freind
yes .this is also my problem the costumers are not telling the true that some else also was working in the set before you and you have to discover
this by your own . some time this take a longer time than usual
to repair. i am happy for this happy ending repair and thanks for your article. my suggestion to you is :check all the suspect caps out of pcb s always.
beh
Robert
August 6, 2014 at 4:24 pm
Hi Beh,
Thanks my friend. My ESR meters are pretty good at checking the e-caps on board. My Blue ESR Meter got here a few days ago - I like it. Normally, I'll remove the Primary filter cap & transformer and check them even if I don't think they are the problem just to put some fresh leaded solder on them. But this Panasonic disk player has some of the best soldering that I've ever seen. You are correct though, it's always better to check components off-board.
beh
August 8, 2014 at 11:13 am
ROBERT: do you have blue ESR meter?
Robert
August 8, 2014 at 3:20 pm
Yes sir. I just got it in the mail a few days ago. I love it.
Yogesh Panchal
August 6, 2014 at 2:22 pm
Mr Robert,
Thanks for sharing the article, Yes it is very challanging and time consuming job if the equipment is already tried by someone else.some time I found Parts are missing also in the equipment.this type of gimmick done by few technician also that "if i am not able to repair no one can." yes some time equipment is not repairable due to an unavailability of Parts.
Robert
August 6, 2014 at 4:32 pm
Thanks Yogesh. I'm still baffled by what the original problem was. I didn't see any evidence of someone soldering out any components. Perhaps there was a cold joint that looked good on the outside on one of the components that I took off? Then her friend bent the pins putting it back together when he couldn't find a problem.
Anyway she is very happy that I fixed it and is supposed to come and get it tomorrow. I'm waiting for a CCFL tester I ordered so I can test the backlight in her HP laptop computer.
beh
August 6, 2014 at 8:11 pm
ROBERT: another article is on the way?
Robert
August 6, 2014 at 9:09 pm
Yes sir. I'm waiting on the tester to test the backlight and see if it is bad or the inverter board.
Waleed Rishmawi
August 6, 2014 at 3:38 pm
good articles and nice photos. usually the customer does not tell you the whole thing..or maybe he/she tells the fault in their own way. that is way, I do my own testing..keeping in mind what the customer said though. sometimes the customer tells me that the dvd is not working..what does that mean? is it power problem or it does not play movies..when I power it up..I realize what the customer meant. thanks for sharing my friend.
Robert
August 6, 2014 at 6:02 pm
Thanks Waleed. You are right.
erik
August 6, 2014 at 7:49 pm
Hello Mr. Clark.
Nice repair subjekt:
i Always say: loke first for the simple solutions, fe. contacts schwitches etc., that takes the lowest time to inspect.
And then the elektronic components fe. Capacitors, IC etc.
regards
Erik from the Netherlands
Robert
August 6, 2014 at 9:14 pm
Hi erik,
Thanks. Yes that's true. I looked at the components first because she said it was working and just stopped. So I expected a blown fuse.
Merlin Marquardt
August 6, 2014 at 9:43 pm
Very nice.
Robert
August 7, 2014 at 12:02 pm
Hi Merlin. Thanks.
Luciano Khware
August 6, 2014 at 10:03 pm
Hi Robert,
I like the procedure you took to reach the fault and mostly that your workshop is well equipped with testing instruments: blue ring tester, DMM,ESR tester, etc. I wonder if I can get ESR or Blue Ring tester here in Nairobi, Kenya. Yesterday i went around electronic shops in town searching for the Digital Capacitance Meter without any success.
Thanks for sharing your experience!
Regards!!
Robert
August 7, 2014 at 12:04 pm
Thanks Luciano. You should be able to find them online. You can ask Mr. Yong. You can check with anatekcorp.com and see if they ship to Kenya.
mahmoud
August 7, 2014 at 4:14 am
hi dear Robert it was pretty amazing to me extraordinary that you diligently to repair the fault.i wish you success.
with the best regard.
mahmoud from iran
Robert
August 7, 2014 at 12:14 pm
Hi Mahmoud, thank you very much. I wish you success also. I'm just a disabled hobbyist that is learning device repair and electronics to have some fun & have something to tinker with. It's a lot better than watching TV or playing video games.
Momchil
August 8, 2014 at 2:26 am
What was the point of checking e-caps for short circuit when you already checked their capacitance. They wouldn't charge at all if they were shorting out...
Also is it usually working to test capacitance of electrolytic capacitors without removing them from the PCB? What about if they are connected in parallel as they usually are that way?
Robert
August 8, 2014 at 3:08 pm
Hi Momchil, Because I wanted to, and I have the time. Also, I like to check things out myself. I checked the ESR while they were on-board. I never check capacitance while the caps are on the board, only ESR. I always remove the caps to check capacitance.
Robert
August 10, 2014 at 3:36 pm
Also Mahmoud, don't forget that an e-cap can short under load, but check fine with ESR, capacitance, and Analog meters. So if you check for a short with an Analog VOM, you may catch it. Sometimes the Analog meter will not catch it, so it is good to check them with an insolation tester. Mr. Yong talks about that in his e-book, "Testing Electronic Components", starting at page 107.
Joshua oloo
August 8, 2014 at 2:38 pm
Thanks Mr Robert for the Article.Its sometimes tricky dealing/testing e-caps.because when you test for short off board they'r indeed have problem but when tested for value they'r Ok.Whats your take on that?
Robert
August 8, 2014 at 8:55 pm
Hi Joshua, you are welcome. I haven't found an e-cap yet that had a short and tested good on the capacitance. But I check it anyway. I don't get to work on many devices, I'm just a hobbyist.
yogesh panchal
August 8, 2014 at 3:42 pm
Dear Sir,
I have just read " I'm just a disabled " in one of your reply.Sir can you share the said word to us If you don't mind!.
Sir i am sharing a web link with you for laptop CCFL testing trick:
1) http://ronelex.com/easy-testing-laptop-backlightccfl-inverter/146/
Robert
August 8, 2014 at 9:11 pm
Hi Yogesh. Sure, no problem. I have degenerative disk disease in my back. Leaning, bending, stooping, reaching, sitting up straight, and standing or walking too much really makes my back hurt. And if I push my back too far, it will make me drop to the ground. The doctors say there is nothing they can do for my condition. I'm just hoping and praying that I never have to be confined to a wheelchair.
So, I can't do much, but I do what I can. I'm from the old school - I can't stand to do nothing like a lot of the younger generation.
So most of my time is spent reading and studying.
If I were repairing devices for a living, I would not troubleshoot like I do most of the time. But since I don't get to work on much, I check components and do things sometimes that most of you guys would not waste your time doing.
Robert
August 8, 2014 at 10:00 pm
Thanks for the link. I don't have a known good inverter board. This computer doesn't have a HDMI socket or I could use my TV as a monitor. The 9 volt battery doesn't do anything. I'm in no hurry. I'll test the backlight when my tester gets here. The last guy that worked on it was supposed to be a computer guy. He charged her $100 and didn't even clean the fan and put fresh thermal compound on the heat sinks. She knows when I give it to her it will be working and won't cost her too much.
mahmoud
August 10, 2014 at 4:59 am
Hi dear Robert iam50 years of electronic repair parts now i realize you know more than me i hope to be successful.
your sincerely Mahmoud.
Robert
August 10, 2014 at 7:08 pm
Oh no, my friend. I've only been learning electronics for 1 1/2 years or so. I have much to learn, and sometimes I forget things. Many people on this website know much more than I do.
Humberto
August 19, 2014 at 7:18 pm
Hi Robert, good idea for doing the repair. Not always the customers say all the truth
Robert
August 20, 2014 at 12:27 am
Thanks Humberto. Her friend probably didn't tell her that he tried to fix it.
Raymundo Saura
August 27, 2014 at 4:17 pm
thanks again sir great article very informative
Robert
August 27, 2014 at 7:05 pm
You are welcome Raymundo. I'm glad you enjoyed it.
JG Ayala
December 6, 2014 at 9:22 am
Hello Robert!
Great article and love the past ones as well. BTW, when r u going to graduate from Hobbyist to Professional?? lol... Seems to me you are more of a Professor than a hobbyist!!! In any case, THANKS!!! Your article are great to read! Keep it coming!!
JG Ayala
JGA Electronics
Orlando, Florida
Robert
December 6, 2014 at 1:12 pm
Thanks JG. I'm glad you enjoyed it. I'm a long ways from a Professor but I appreciate your kind words.
Ivan
June 3, 2020 at 1:47 am
thanks