Philco 55 Inch 4k LCD, Is this a side tab issue?

[Biruslapio]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

They do get mixed everywhere except the leftmost part.

[Diah]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

They do get mixed everywhere except the leftmost part.

post clear photos on whole boards to show how they connect together,,, and one very close and clear with high res of the t-con

[budwich]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

Here it is, this is the screen aftes 5 minutes of this fixed image.

that resulting image is a "non-driven drivers" related to the tabs on the right side looking at the screen. Post a picture showing the tabs along the side.

[budm]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

It is panel issue.

[Biruslapio]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

The T-CON had already been messed with, this TV was taken to Philco's authorized repair shop before for diagnosis of the fault, those two transistors that were resoldered are the same ones listed on the electronica-pt repair hint.

This is what "Alancoteau" at electronica-pt described: T-Con fault, Insulate (cutoff) Pins 9~13 and exchange NPN transistor C5886A, also check A2097.

Nothing unusual with C5886A and A2097, I've taken them out of the board and measured each one, normal forward voltage, no leaking when polarized in reverse, maybe the other technician already replaced them, all the SMD resistors are good and no shorted capacitors or open fuses.

NOVATEK NT50115 - IC3004
NOVATEK NT71788MFG-000 - IC2001
MXIC MX 25L8006E - IC1001
RT6914 - IC4002
BO85BM - IC3006

[Diah]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

for future the test you did of slide show and showing mixing image related to T-CON, but now different story.. how it was before they took it to service center NO ONE KNOW... i wounder what kind of service do this instate put in place new t-con maybe one user over here working there..lol
!!! so funny

BTW i saw more bad displaying picture on 4K sets with out name.. they look like the liquid of crystal washing away over the screen,,, and the reason was part of firmware which injected the t-con with most important part the refresh rate..

i advice you to spend on working t-con in case you didnt or any other missed with tabs

[Biruslapio]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

Alright I've just gone and ripped the 8 side tabs from the right, now it's back to life, cool. Full image is working without clouding or darkening anywhere, just some minor horizontal faint lines near the edge of the right side, guess that can't be helped, thank you all Badcaps members for guiding me through the solution.

[budwich]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

glad it worked out. It certainly is better than scavaging the boards as this gives someone a watchable panel as opposed to a "garbage dump lobby". :-)

[budm]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

Thanks for the follow-up.

[dick_barton]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

Alright I've just gone and ripped the 8 side tabs from the right, now it's back to life, cool. Full image is working without clouding or darkening anywhere, just some minor horizontal faint lines near the edge of the right side, guess that can't be helped, thank you all Badcaps members for guiding me through the solution.

Can you post a picture of the final outcome.

[Diah]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

i would like to add my last comment on this threat hope some one read it if he face narrow issue to this set displayed..

you removed innocent part player on the panel ( the side driver )... but not the prime causer (T-CON).. for private who don't care do it but never expect joy with it.

[Biruslapio]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

It's kinda weird to say it's working but not post a photo, now it's more proper.
The TV and the eight side tabs that I peeled off by hand carefully.

If you're 2 meters or farther from the screen you can't see the horizontal lines, I've also not removed the tape cutoff, don't think it will change anything.

The T-CON may have cause the issue, I'm not an LCD expert, so I don't know anything about what happened to the panel, but only removing side tabs "fixed" it, also no info on any of those NOVATEK chips or service manual for this TV, so no way to service the T-CON.

[budm]

Re: Philco 55 Inch 4k LCD, Is this a side tab issue?

The pictures will not be perfect but usable when one side of Gate drives are removed.
Big panel need to have Gate drives on both sides, if it is on only one side then you will have propagation delay for the drive signal to get all the way across the screen to the Gate on other side, so right now the left Gate drives are doing all the works and you see some minor effect.