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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
No help so far? No DLP experts?

 
 


minneapolist
Novice

Feb 8, 2008, 5:25 PM

Post #1 of 4 (134 views)
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No help so far? No DLP experts? Can't Post
Hello, this is a previous thread I have had no response to and gotten numberous diffent answers from local techs could someone please help me before i dive into this unit!!!!!PiratePiratePiratePirate

HELLO, I HAVE BOUGHT A SEMI LOAD OF DLP TVS FOR LIQUIDATION AND I HAVE GOTTEN A FEW DIFFERENT RESPONSES ON SWAPPING OUT BOARDS. FOR INSTANCE I HAVE A SAMSUNG 61" DLP IN MINT CONDITION BUT HAS AN ISSUE. I TALKED TO A SAMSUNG TECH AND HE TOLD ME I NEEDED THE DMD BOARD WITH THE MIRROR CHIP IN IT. HOWEVER THE PART WAS LIKE 400 BUCKS. I HAVE 3 OF THE EXACT SAME MODEL AND TYPE NUMBER ALL WITH TERRIBLY BROKEN SCREENS AND MIRRORS. MY QUESTION IS CAN I SWAP A DMD UNIT OUT OF THE UNITS WITH BROKEN MIRRORS WITH THE MINT TV WITH THE PROBLEM??? I HAVE DONE THIS BEFORE WITH LCD TVS AND IT WORKED GREAT BUT SOMEONE TOLD ME YOU CANNOT DO THIS WITH DLPS BECAUSE ALL BOARDS ARE PROGRAMMED TO WORK WITH DEFECTIVE MIRRORS?????? IS IT TRUE ALL BOARDS ARE NOT INTECHANGEABLE? IF SO WHICH ONES SHOULD I NOT INTERCHANGE I HAVE PLENTY OF UNITS TO FIX . .. . DMD MOST IMPORTANT RIGHT NOW.



denonjapan
Enthusiast

Feb 8, 2008, 11:43 PM

Post #2 of 4 (122 views)
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Re: [minneapolist] No help so far? No DLP experts? [In reply to] Can't Post
Don't WASTE TIME over this, I had caused so many enemies when things get rougher and can't deal with reality. if they have same model, they can be interchangeable but you have to realize, when each of your collections became defective in the first place. Each of them has defects causing them to malfunction right? so, the answer is still NO.

denonjapan
made in japan


minneapolist
Novice

Feb 9, 2008, 8:20 PM

Post #3 of 4 (105 views)
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Re: [denonjapan] No help so far? No DLP experts? [In reply to] Can't Post
denonjapan,

I respect the reply and have read many of your other replys that I am not 100% certain when it comes to the quality of your advice. ( No offense, you just seem a little hotheaded in the TV repair world ).

The question still remains can you interchange a DMD I am looking for quality advice I am far from junking the set. Yes the dmd failed meaning there could be problems within the light engine . . . . .The main question is if it will still work . . . . .Basically could I buy or swap a DMD out of my other sets I am told this will mess up the light engine is that true or false???

Thanks denonjapan for the reply but please answer the most important question Basically could I buy or swap a DMD out of my other sets I am told this will mess up the light engine is that true or false???

With all due respect if if when each of your collections became defective in the first place. Each of them has defects causing them to malfunction right is true than there would not be a need for the tech community or this forum


denonjapan
Enthusiast

Feb 10, 2008, 2:26 AM

Post #4 of 4 (95 views)
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Re: [minneapolist] No help so far? No DLP experts? [In reply to] Can't Post
Yessssssssss, we're talking an array of micro mirrors. This occurs upon removal of the sacrificial layer. During the preliminary wafer sawing step, it is important that individual chips not be contaminated with particles, which can interfere with the DMD's mechanical operation and can produce defects associated with light scattering.
Once the DMD mirrors are mechanically released, The entire assembly process requires a cleanroom environment and particle monitoring. Dissoldering is a VERY IMPORTANT FACTOR, since the package not only provides signal and power lead connections to the chip, but also provides protection from the outside environment.Although a familiar sequence of assembly operations is employed for the DMD—die attach, wire bond, window seal, and final test—the structure nevertheless requires special handling. Front-side, pick-and-place contact collets will damage the DMD's mirror array,and particulate contamination can cause numerous problems. Special attention must be given to particle control and device handling during each re- assembly operation. The die attach and window sealing processes must utilize adhesives with low outgassing properties, since adhesive outgassing can promote mirror stiction.
Lastly, regardless of how You take the quality of my advice, will depends the pertinence how you understood your own question. if so,You will then prove me if that's TRUE OR FALSE.

denonjapan
made in japan


(This post was edited by denonjapan on Feb 10, 2008, 2:31 AM)

 
 
 


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