Re: VO47L FHDTV10A no picture on 2 of these sets
BTW, I'd love to be able to clean this thread up a little for anyone who may use it in the future. Is there any way to get temporary moderator privileges so I can pull offsite linked pictures and such? I'm sure I haven't seen the last of the issues with this set and since we're keeping this one, I'd love to keep the thread updated and as clean and useful as possible now that I know how.
djrobbaron
Member
Last Activity: 03-07-2014, 12:49 PM
Joined: 04-29-2013
Location: Radford, Virginia
-
Re: VO47L FHDTV10A no picture on 2 of these sets
So I get back from Christmas Eve family stuff out of town at 10PM last night to find my Digi-Key order sitting on the front porch...
(They kick so much butt at packaging and shipping. Always a pleasure.)
As I stated before, I goofed the order and didn't get the ChipQuick desoldering alloy. I was also running on about 2.5 hours sleep from the night before, but I had to at least make an effort to get a big screen on the wall before the family woke up for Christmas morning. Eyelids propped open with toothpicks,...Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
I've ordered the BD9897FS chips for the inverters and also ordered enough mosfets to replace all of them. I also put the chipquik on there.. however I just realized I probably ordered the wrong thing. I had drag soldering on the brain and ordered [URL="http://www.digikey.com/product-search/en?WT.z_header=search_go&lang=en&site=us&keywords=SMD4300TF10-ND&x=-1451&y=-51&formaction=on"]this[/URL]. On the plus side, I am pretty comfortable with my Hakko soldering station. I should be able to find the lowest...Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
Mike, I did screw up on U7 there was no 1 on pin 1. In other words:
U7
AMC1117
F0748M
Pin 1 = .02
Pin 2 = 1.26
Pin 3 = 3.3
I sincerely apologize for the error transcribing my notes to screen.Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
Thanks Mike. The chip on the inverter boards is indeed the BD9897FS. I'm pouring through the references in the forum now and then it's back to the voltage regulators. Does it look like I got all of them? I may borrow a working one from the other TV to test since they each have 4 of the same one.Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
Ok, catching up here. First things first I guess, the voltage regulators on the main board starting with the one closest to the power plug and progressing away. I believe I got them all, there are a few components on the board that look similar, but their ID's aren't even close to the ID's on the ones below. A couple of these measurements would alternate by 1 digit, I've included the higher value in parentheses. I have no idea if such fluctuation is important, but figured I'd better mention it. Maybe it's my cheap DMM, maybe it's...Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
Holy cow. I didn't realize the thumbnails weren't expanding. Fixed below. Thanks for the heads up.
Label (in case there's info here that changes with revisions I'm not aware of)
Master Inverter Board (showing damaged caps and burnt IC traces)
Nasty burnt area of PCB on the top left corner of the Power Supply (Should I say PSU from here out?) that is beneath cap CY5 (determined from looking at one of the other power supplies).
The flip side of the above...Leave a comment:
-
-
-
-
-
-
-
Re: VO47L FHDTV10A no picture on 2 of these sets
While I'm in that process, is it probable that the IC's with the burnt traces on the inverter boards will need to be replaced or do you think soldering the traces back will suffice? From the best I can tell due to the burnt "divot" on the 5th digit, they are [url=http://www.digikey.com/product-detail/en/BD9897FS-E2/BD9897FS-E2CT-ND/3769076?WT.mc_id=IQ_7595_G_pla3769076&wt.srch=1&wt.medium=cpc]this part[/url]. (see the condition of the ICs in the second photo of the original post)Re: VO47L FHDTV10A no picture on 2Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
While I was waiting I recalled seeing something similar in some of your posts I read long ago mentioning checking voltage regulators. This made me wonder if "follow these steps" was a typo or was missing the link. I found one of these prior posts with the link
[url]https://www.badcaps.net/forum/showthread.php?p=300999#post300999[/url]
you shared of retiredcaps instructions.
I'll head that route in case that's what is coming next.
(see, I'm not gonna be one of those lazy posters...Leave a comment:
-
Re: VO47L FHDTV10A no picture on 2 of these sets
Thanks for the quick reply johnboy1313. Your post didn't show the steps for me to follow to check the voltage regulators. I have picked a set to start with and have checked all surface mount fuses I saw on the main board (2 surface mounts), power supply(1 ceramic on input side), and inverters(1 surface mount on input side of each). By checking, I mean I set my multimeter to continuity and put the leads on either end of the fuses in circuit and confirmed continuity with audible tone. If that is the procedure, they all checked out.Leave a comment:
-
VO47L FHDTV10A no picture on 2 of these sets
Hello folks. First time poster, 8 month lurker. Be gentle
I have two Vizio 47" TVs, model VO47L FHDTV10A. I believe budm asked for confirmation on another thread concerning the second digit. It is indeed the letter O and not the number 0.
Both of these sets have the same boards. They both have the same symptoms. Plugs in to standby (amber logo comes on). Powers on with button (logo changes to white. I don't have remotes for either) The screen does not power on.
I have checked a few voltages against chassis ground per this YouTube video from one of... -
Re: New Members - please post your introductions here
Hello, my name is Rob and I attract bad capacitors.
I've been lurking here since April of this year and worked my way through my first TV repair without a peep. Since then, the wife has let me take up half our small home in Virginia with broken sets that other people seem to be fortunate enough to throw away and replace like disposable diapers. I thank you for inspiring me to join your ranks and look forward to wallpapering my shop with shop vivid pixels.
Keep up the great work fellas and thanks for having me!Leave a comment:
-
Re: New Members - please post your introductions here
Howdy folks. My name is Rob. I'm from Radford, VA in the U.S.
Extremely novice, but I managed to do a cap repair on a plasma TV once. As a result.. I now have 1 plasma and 3 LCDs in my basement, all in need of repair. The journey begins!
Thanks for having me,
RobLeave a comment:
No activity results to display
Leave a comment: