These LED modules are in a projector and the manufacturer no longer offers replacements, and won't tell me who the OEM is.
In the attached picture I have a red green and blue LED modules, I would like to de-solder and replace the SMD LED or if somebody can recognize the whole module (which I think is proprietary) that would be fine also. Unfortunately I don't have these in hand yet, so I cannot measure the LED itself accurately but just scaling off the picture looks like about 7 x 3 mm. These are out of a projector and I would imagine are quite bright.
If I de-solder these do you think there would be a part number on the backside identified the original manufacturer? If not is there any reason I couldn't get the highest light output chip in same physical size and don't worry about it because the power supply will only drive it to its maximum anyway? I don't know what to do here but am appreciative of any help anyone can offer...

 

What you need to define a replacement is the specifications of the LEDs, including power level and current, as well as the physical dimensions. With that information a "Field Application Engineer" or a good sales engineer from one of the LED companies should be able to help find a replacement.
I doubt very much that there is any information on the actual parts. AND some companies very deliberately remove any device markings before assembly. Some manufacturer's websites may also have have images that you can compare.

 

Thanks MasterBill2,
I agree with you, it would be great if I had the OEM specs, but I dont and the projector mfgr will not tell me who OEM is.
Is there any way to replace these by going with devices that are equal or higher current specs?

 

Thanks MasterBill2,
I agree with you, it would be great if I had the OEM specs, but I dont and the projector mfgr will not tell me who OEM is.
Is there any way to replace these by going with devices that are equal or higher current specs?

My first question is about the projector: Is it working presently??Planning for a future replacement is easier than searching for a replacement when an item has failed.
Is the reason for seeking an alternative the cost?? That is often the case, as those who sell poor quality cheap hope to make the profit on service parts. If you are able to measure the voltage while the projector is operating that can be useful towards finding a replacement.
I have had some success in finding manuals and information on line, as well as a couple thousand who want to sell me whatever it was. AND on occasion folks right here have resources that I d not have, and they can be very helpful.

 

The problem is these are now dim as they are ~8 years old and used in 24/7 service so ~64000 hours.
Probably driven very hard to get the brightness they wanted.
The other problem is the projectors are located outside my country and not convenient to ship to me, and no one there can measure the voltage either.

 

~8-years is an astounding life-span.
It's time to replace the entire Projector(s).
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It is amazing the number of folks who believe that all things wear out and are only suitable for scrap. I am quite aware also, that in some parts of the world repairing makes a lot more sense than replacing. In addition, not all organizations are burdened with more money than they know what to do with.
So now a question about the projectors. I see the LEDs, but is there the rest of the projector there also?? That would allow measurements to be made, or at the very least, the label tag describing power requirements to be read.
IF the TS has the resources available to carefully power the LED assemblies by means of the terminals, then it should be possible to see what both the current and the forward voltage of the LEDs are.
With that information, in addition to physical measurements of the size of the LEDs, a catalog investigation should be able to locate a replacement. OR at least reveal the manufacturer of the LEDs , which may provide contact information as to an exact replacement.

Of course, I also have products in the field that have suffered laser deterioration, for the reason that the Lazy people keep them powered constantly, when the use would seldom be more than an hour a day. This despite reminding them that the laser assemblies have a stated lifetime of only 12,000 hours.

 

I think that the biggest hurdle to get over is the apparency that this
repair is being attempted over a long-distance Telephone conversation,
and the person on the "other-end" may have
limited experience. and/or, limited test-equipment to work with.

And, Time is Money.

I've had several situations where a "store-bought-solution", and a custom-built-solution were
presented to the prevailing "management".
One project was a Cooling-Tower-Sequencer for 3-giant-Cooling-Towers in a brutal "Salt-Air" environment.
The Custom-Built version took around ~4-weeks to complete, document, and verify it's operation.
I enjoyed the challenge, and it performed flawlessly for around ~17-years that I'm aware of,
but they could have saved at least several thousand Dollars and ~3-weeks by
simply purchasing the supposedly "too-expensive" Store-Bought-Controller.
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