DO THERE IS A SOLUTION PREVENT MELTING DIFFUSER

[bohaboha]

I want to find a solution, perhaps an ultimate, solution to this dilemma with your expertise. As it stands, the diffuser is too close, if not directly on the joint, there must be a way to separate without affecting image quality, I'm thinking with small glass strips or maybe pieces that make it a little distance, melan, them, or what do you suggest?

[Diah]

there are one solution only.. stop buying Samsung

[bohaboha]

there are one solution only.. stop buying Samsung

THANKS diah but is it a specific SAMSUNG problem? because I see it on many other brands like Sony Philips and many other not well known brands like Voxicon etc ect... So maybe it's time to think about coming up with some kind of preventative solution

[nomoresonys]

I don't buy their junk but from what I understand, after replacement backlights or fixing/replacing diffuser and setting the backlights to a reasonable level, the diffuser don't burn up again.

[lotas]

You just need to reduce the backlight current in the power supply, in the backlight driver, increase the resistance of the resistors in the current sensor, reduce the current supply to the LEDs (they heat up less, last longer).

[Diah]

THANKS diah but is it a specific SAMSUNG problem? because I see it on many other brands like Sony Philips and many other not well known brands like Voxicon etc ect... So maybe it's time to think about coming up with some kind of preventative solution

well as much i know in practice.. only smasung edge BL milt the diffuser
and any thinmgd u put to push the diffuser to top.. it will left shadow light on screen edge

[bohaboha]

You just need to reduce the backlight current in the power supply, in the backlight driver, increase the resistance of the resistors in the current sensor, reduce the current supply to the LEDs (they heat up less, last longer).

I think maybe you can do it for your own TV, not for something that you are going to do, congratulations for repairs, I'm thinking of something more simple

[bohaboha]

well as much i know in practice.. only smasung edge BL milt the diffuser
and any thinmgd u put to push the diffuser to top.. it will left shadow light on screen edge

That's exactly what I want to avoid "shadow light on screen" therefore I thought of small glas pieces that you can put on the joint, it might raise some mm. Haven't tried yet but will try with a Philips that I have lying around here

[nomoresonys]

I think maybe you can do it for your own TV, not for something that you are going to do, congratulations for repairs, I'm thinking of something more simple

Gave you the simple solution in post #4, tv menu backlight setting is it 100 put it less than 50, 20 put it less than 10, never have it on vivid or whartever they're calling 100 percent, if left on 100 or whatever the max is will burn shit up every time.

[vinceroger69]

You just need to reduce the backlight current in the power supply, in the backlight driver, increase the resistance of the resistors in the current sensor, reduce the current supply to the LEDs (they heat up less, last longer).

This is a good suggestion a lot of people have started doing this now

[lotas]

Yes, it’s just that all TV companies turn up the maximum current that powers the LEDs so that they burn out after their warranty expires (the warranty is over - the backlight burns out).

[nomoresonys]

Current mod with resistor is nothing new, been done for years, even here, youtube is full of it, but must be done correctly.

[Diah]

That's exactly what I want to avoid "shadow light on screen" therefore I thought of small glas pieces that you can put on the joint, it might raise some mm. Haven't tried yet but will try with a Philips that I have lying around here

just keep in mind.. any pieces of glass or other transparent material if they didn't designed with light filter.. you will have rainbow effect more worse than shadow effect

about increase current sensor,. it work for HD TVs, but within 4K 8K TVs specially with HDR / HGR (10) & HDR (10)+ you will lost the color calibration value. and need to calibrate it again again which need tools. no one of us own it... just because its belong not for repair but for lab only.

[EazyBone]

I don't see the point in this. Take apart an entire TV to put a piece of glass to stop the diffuser from melting even though the LEDs are going to go out anyways because of being overdriven? Just so you can then take it apart and repair it so the diffuser is still good?

[bohaboha]

Hello all .many nice advice, lower the baklight level. Or to reduce the backlight current in the power supply sure if it was my own TV and you should do from the start .but here are 8 tv s with different brands that have the same problem and the customers want me to fix them. Therefore, I turn to your experience and try to figure out something from your proposal.
Let's try again guys.

[nomoresonys]

You have the answer, you are NOT going to reinvent the wheel, if the diffuser is melted it's junk and needs replaced, this video shows the upgraded diffuser. Do a search and see where you can get them, the end: https://www.youtube.com/watch?v=sawYS2pWS5k

[bohaboha]

thank you all