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Search: Posts Made By: angelos
Forum: Troubleshooting TVs and Video Sources 10-10-2021, 11:49 PM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

Or maybe order a complete board via Ebay and hope it works.
Just a question, if the board arrives and I fit it and there is something wrong like the picture is flipped upside down or some other...
Forum: Troubleshooting TVs and Video Sources 10-10-2021, 11:29 PM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

I will replace that chip and see what happens! Will take months for the part to arrive.
Forum: Troubleshooting TVs and Video Sources 10-10-2021, 12:09 PM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

Thanks Yokoono,
I saw those coils.. The plastic tops have cracked or perished. Probably from heat. So you agree with me the RT6931 chip might be the problem? So I will order it and hopefully it...
Forum: Troubleshooting TVs and Video Sources 10-10-2021, 08:08 AM
Replies: 19
Views: 477
Posted By angelos
Forum: Troubleshooting TVs and Video Sources 10-10-2021, 08:07 AM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

Hi Guys, i did further tracing around the voltages that are missing on the TCON and i noted the following. When mains power is applied to the tv the TCONs ribbon supply voltage from the main board is...
Forum: Troubleshooting TVs and Video Sources 10-08-2021, 02:15 AM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

Ok, I will take a proper photo of it and also test it tomorrow when I am back in office.
Thanks so far.
Forum: Troubleshooting TVs and Video Sources 10-08-2021, 02:07 AM
Replies: 1
Views: 130
Posted By angelos
Re: What volate/current LED is used in this ... ??

getting any technical info out of those vendors selling their stuff on aliexpress is a real challenge. I don't think they know themselves what they sell.
Do you know how to measure what shape LED...
Forum: Troubleshooting TVs and Video Sources 10-07-2021, 12:25 AM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

Hi there,
I don't understand your reasoning. The label says 1.2V and i am getting 1.23V so that is spot on.
Forum: Troubleshooting TVs and Video Sources 10-07-2021, 12:24 AM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

Hi, yes i will check that on saturday and get back to you
Regards
Forum: Troubleshooting TVs and Video Sources 10-05-2021, 11:12 PM
Replies: 19
Views: 477
Posted By angelos
Forum: Troubleshooting TVs and Video Sources 10-04-2021, 04:46 AM
Replies: 19
Views: 1,461
Posted By angelos
Re: TCL 65" U65E5800FS - Black shading after startup

Actually they can be intermittent.
Forum: Troubleshooting TVs and Video Sources 10-04-2021, 04:44 AM
Replies: 19
Views: 1,461
Posted By angelos
Re: TCL 65" U65E5800FS - Black shading after startup

No, I am talking of the actual glass LCD panel. There are flexi ribbons connected to the glass. We have gate COF and Source COF IC's and these chips and their connection onto the glass are...
Forum: Troubleshooting TVs and Video Sources 10-01-2021, 03:16 AM
Replies: 19
Views: 1,461
Posted By angelos
Re: TCL 65" U65E5800FS - Black shading after startup

I would loosen the bezel and when the tv does the shadow thing i would lift the glass to see if my back lights are causing this issue. Just maybe its them, like a string of leds going dead. You seem...
Forum: Troubleshooting TVs and Video Sources 09-30-2021, 11:33 PM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

I measured some voltage points and these are the results

VONE = 0V
STV2 = 0V
VIN_1.2V = 1.23V
VL = 0V
UL = 0V
LL = 0V
VH = 0V
Forum: Troubleshooting TVs and Video Sources 09-29-2021, 10:45 PM
Replies: 19
Views: 477
Posted By angelos
Forum: Troubleshooting TVs and Video Sources 09-29-2021, 10:45 PM
Replies: 19
Views: 1,461
Posted By angelos
Forum: Troubleshooting TVs and Video Sources 09-28-2021, 05:02 AM
Replies: 19
Views: 477
Posted By angelos
Re: JVC TV Model LT-65N675- No picture

The chip RT6931 below has 5 solder spots marked CPOUT, UH, UL, LH and LL and there is 0V on all 5 when set is running.
Is the UH actually VGH???
Check photo
Forum: Troubleshooting TVs and Video Sources 09-28-2021, 04:50 AM
Replies: 19
Views: 477
Posted By angelos
JVC TV Model LT-65N675- No picture

Hi guys,
This set has no image. The back lights are running but the TCON seems dead.
The fuse on board is ok, 12V is present. The problem seems as if there are voltages missing but due to weird...
Forum: Troubleshooting TVs and Video Sources 09-27-2021, 04:52 AM
Replies: 19
Views: 1,461
Posted By angelos
Re: TCL 65" U65E5800FS - Black shading after startup

I think it is a panel related issue, perhaps the side COF IC's that are causing the issue. I had my Samsung TV doing this intermittently and i found one of those side COF IC's was touching on the...
Forum: Troubleshooting TVs and Video Sources 08-10-2021, 04:08 AM
Replies: 16
Views: 606
Posted By angelos
Re: JVC LT-40C860 stuck on logo

I saved a tv like that. I desoldered the chip off the board and fit it in my eprom reader. Then i sprayed it ice cold and started the read process. During the read i sprayed it again. I got a data...
Forum: Troubleshooting TVs and Video Sources 07-28-2021, 06:40 AM
Replies: 33
Views: 2,076
Posted By angelos
Re: Samsung UN70NU6070 TV Issue - HELP!

+1
I totally agree with that.
Forum: Troubleshooting TVs and Video Sources 06-22-2021, 03:01 AM
Replies: 17
Views: 574
Posted By angelos
Re: Hisense 58R6E Stdby Light No Display

All the veterans can back me up on this but my opinion on led strips is that if you have a whole string of LED's that are in series and some blow then the MTBF (Mean time before failure) has been...
Forum: Troubleshooting TVs and Video Sources 05-19-2021, 04:22 AM
Replies: 18
Views: 988
Posted By angelos
Re: JVC / Changhong 65" Replacement Motherboard (android)

I think you solder the three wires namely cmd, D0 and CLK from the RT809H programmer directly onto the board and read or write the chip. This is my understanding from this thread.
Forum: Troubleshooting TVs and Video Sources 05-03-2021, 04:24 AM
Replies: 9
Views: 533
Posted By angelos
Re: LG Flashing Backlights

Could we get a picture of the faulty diode in the mother board for future reference?
Forum: Troubleshooting TVs and Video Sources 04-28-2021, 03:45 AM
Replies: 19
Views: 1,266
Posted By angelos
Re: LG 55LM6200 part of image is darker

You need a microscope! I once cut the wrong CKV lines on a tv and had to resolder those minute tracks with thin wires. What a nightmare. Good luck on the eye strain.
Showing results 1 to 25 of 303

 
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