I’ve never done a tutorial before, but I’m going to try as I couldn’t find anything online for a Samsung LSP9T UST Projector.
If your projector is under warranty, I DO NOT recommend doing this repair yourself as you will void your warranty.
This isn’t complete as I had already done the repair when I decided to open the projector back up & take photos. This tutorial will NOT show how to remove the board to access the chip but I do have a picture of that area included.
I am no expert, so if you choose to follow this tutorial, you will be doing so at your own risk! I will NOT be held accountable for any damages that may occur during this repair.
Now let’s get to it…..
Tools needed
- Small Phillips screwdriver
- Small flat head screwdriver
- Lint Free gloves
- Lint free microfiber swabs (I bought AAwipes from Amazon)
- Replacement DMD Chip (eBay user stevenusashipping 2715-7039P Item#335314776076)
Find a suitable location to perform this repair. I used my kitchen island after putting down a towel for protection.
Flip the projector upside down & remove the 9 phillips screws circled in red (1 screw is hidden under a warranty void sticker)
Flip the projector back upright & remove the speaker grille. At the top corners pry up with your fingers to release the corners, then work your way across the center top of the grille. Once the top is loose rotate down away from the projector & the bottom should come loose & the grill will be separated from the projector (reinstall in reverse order – bottom of the grille in first then lift the top edge as rotating upward). Once the grille has been removed you’ll see 4 screws down in front of the speakers (not pictured) that need to be removed to separate the case. Afterward the case should pop loose but be careful as there are 5 sets of wires from the top case to the boards inside that need to be unplugged (a second person holding the top case while you unhook the 5 plugs is recommended).
#1 & #2 of 5 plugs to remove the top case (J81 towards the front of the projector, J80 towards the rear).
#3 of 5 plugs to remove the top case
#4 & #5 of 5 plugs to remove the top case. Once the cables are unplugged you can set the top of the case aside.
Picture shows 5 plug locations once top case is removed (circled in red). Also, shows 6 ribbon cable locations to remove (circled in yellow). The cables marked 1x need to be removed to be able to get the copper radiator out (5 screws circled in green). The 2x marked cables only need to be unplugged from the left visible board.
Photos above show the large ribbon cable & circled in yellow show the tabs you squeeze to release the ribbon. Same for the ribbons marked 2x from photo above
You can see in the 3 photos above, the black “clip” has to be pushed towards the ribbon cable to release it from the plug. When reinstalling, push the ribbon in all the way in, then push the black “clip” back towards the board to lock the small ribbon in place.
Once the ribbon cables have been disconnected, remove the 5 screws (circled in green) to remove the copper radiator
Once the copper radiator is removed (there will be thermal paste on the underside of the radiator, you will want to clean the thermal paste from the copper radiator before reinstalling) remove the 4 screws (circled in blue), then remove the 5 screws (circled in teal) to remove the DMD chip board from the projector (sorry, no photos were taken of these steps).
Be very careful when removing the DMD board from the projector. Under the board is a lens that needs to be kept surgery clean. I used the swabs to make sure the lens was dust free before reinstalling. Once the board is removed from the projector flip it over to see the DMD chip. Turn the black slotted screw counter clockwise to release the DMD Chip from the circuit board. The OEM DMD Chip pictured. Clean the thermal paste from the board as best you can. Reinstall the new chip in reverse order. The new DMD Chip came with a new thermal paste square to reinstall. It has clear plastic on both sides that needs to be removed first. Once the DMD board is reinstalled & the metal plate onto the board, apply the thermal paste to the copper radiator & bolt back into place.
Be sure that the lense is dust & lint free before reinstalling the DMD Board into the projector.
Reinstall everything in reverse order. You can test the projector without reinstalling the top case but you won’t be able to access “tv” or use the remote without the top case wiring plugged back in. I have an Alexa Fire Cube so I was able to check everything using it before putting the top case back on.
Also, I had been seeing light washing across the screen that I didn’t remember seeing before & the new DMD Chip has fixed that too.