Samsung DMD board replacement - Page 8

I tried searching the three parts sites mentioned earlier in the the thread, and only Samsungparts.com lists a DLP chip if you search for your model. The part they list is # 4719-001962. HTH

So am I correct in saying that if the symptoms I am having is white dots stuck on the screen....that the only part I have to replace to eliminate the dots is the the Samsung DLP Digital Light Processor which is part # 4719-001981?

Replacing the DMD board and or the light assembly are seperate correct?

Thanks so much guys

It helps a lot, thx Pez. BTW i'm curious, how did you know that it's the part for my tv set? Cause i'm scratching my head over last few days trying to find it... ha ha ha. Can i just look into my old and damaged DMD chip to know the exact part numbers? Not that i doubt you, i'm just curious you know .

But once again thx to PezJunkie, the master of white dots epidemic...... You're sure more helpful than the guys at samsung here............
THX ALOT!!!!

I'm just trusting that the parts sites have it listed right, but there's no magic to it really.

samsungparts.com: Search by your model number and then click the link to show all parts. Search on that page for "DLP".

partstore.com: Search by your model number and then use the keyword search box at the top to search for "DLP".

encompassparts.com: Use one of the other sites first to find the part number that you need.

The "DMD board" is a circuit board with an image processor chip and a socket for the DMD Panel/DLP to plug into. AFAIK, this part can be responsible for a bunch of odd display problems, but white dots is not one of them.

The light engine assembly is the entire projector part of the TV... lamp, color wheel, DLP and all the mirrors & lenses that it takes to project the image up onto the screen. This is Samsung's recommended fix because it's quicker & easier to replace, plus it's virtually guaranteed to fix any issue because you're replacing *everything*.

As for the DLP/DMD Panel:
If you have one of these models, you will need to check the version listed on the right side of the TV:
HLS**86WX/XAA
HLS**65WX/XAA
HLS**66WX/XAA

If you have a Version PB02 the part # you are to order would be 4719-001981

If you have a Version PB01 the part # you would order would be 4719-001968

Get manuals and documentation here: http://www.drop.io/HLS5086W
You will mainly need "disassembly reassembly.pdf"

Thanks to everyone on this site. I too have a Samsung 50' DLP about 2 yrs old.... started with a few dots and was up to about 31 dots last night.

I read through the posts a week or two ago, ordered my part on line, and just successfully completed my fix.

Took me about 1 hr and 15 minutes start to finish -it took a little extra because the pictures in the instructions I downloaded from this site were very similar, but not exact. (Guessing maybe instrux manual pictures were PB01 vs my PB02)

But, I figured it out and only $173.74 later have a dot free picture now!!!

It's worth noting that the manual actually has 2 separate sets of directions for the 2 different types.

The page labeled "12-14" starts the directions specific to the Type A (PB01) sets.
The page labeled "12-17" is the start of the section labeled Type X (PB02).

It appears that the Type X directions are a lot more detailed.

I was looking for parts online and I just want to make sure I don't order the wrong part, my TV is a HLT5075S version PD01. The part number samsungparts.com has is BP96-01853A.... That is for the DMD Board.... Is that right? or am I a little slow in the head?

Okay I have received the replacement Panel (Type X) and have a couple of questions regarding the Disassembly & Reassembly document.

1. the instructions start on 12-17 so to get to the unit (light asembly?) they are working on can you get it from the rear panel of the TV or do you need to seperate the front panel of the TV since its in front of the mirror?

on page 12-20 it says never touch 3 screws in Red circle but I see three white circles so is this a miss print? Are these the alignment screws?


on page 12-23 it shows a Hand tool for removing the panel. For the guy who doesnt have everything what do you suggest for prying the panel loose?


Thanks much for answering my questions...

The "DMD board" is a circuit board with an image processor chip and a socket for the DMD Panel/DLP to plug into. AFAIK, this part can be responsible for a bunch of odd display problems, but white dots is not one of them.

According to samsungparts.com and partstore.com, the only DLP for the HLT5075S is part number 4719-001981.

samsungparts.com: Search by your model number and then click the link at top right that says "View Entire Parts List for this Model". Search on that page for "DLP".

partstore.com: Search by your model number and then use the keyword search box at the top to search for "DLP".

I have the same white dot problem and was curious if anyone knew which part number I needed. I have a HLS5687WX/XAA version PF04. I went to the samsung parts and there were two chips that came up.
4719-001985 DLP
4719-001969 DLP
Any help would be appreciated!

My dad called me last night about their downstairs TV that has the same problem. It's used very infrequently and apparently my Mom left the TV on in the armoire for 2 months. I guess she just turned off the cable box, but left the TV on. So perhaps it is heat related. It seems that Samsung is backordered for the next 4 weeks, at least. Partstore has it in stock for $30 more than Samsung.

This is what their screen looks like, probably because the problem wasn't noticed for 2 months. My Dad says you can't really even see the picture. It looks like the same problem everyone else is having only worse, so I guess I'll talk to him about replacing the chip. Theirs is a PB02 board, model number HLS 5086WX/XAA.

I was going through the disassembly instructions and I'm a little confused. It looks like I need to follow the first part of Section 12-1-1 to remove the panel. Then skip to section 12-1-3 and remove the optical engine without having to remove the main board? Then from there, skip to section 12-1-10 entitled "Separation of the DMD board (Type X)".

If so, where did everyone get the special tool they show in this picture, or is there something I'm missing. Thanks!

Yeah, that progression looks/sounds right.

I didn't have any special tool, I just used my fingers to pull the chip. Just pull evenly on both sides so as not to bend the pins. (Although I guess if the chip is bad, who cares? )

I successfully replaced the DLP chip (4719-001981) in my HL-S4676S this morning! Took about 1.5 hours, even though my set was a bit different than the manual that was posted I was able to get through it without much problem. Thanks again to everyone who posted here, it was great to get this taken care of for $160 as opposed to buying a new set. Lets hope I can get more than 2.5 years out this new chip.

Thanks again all...

Model: HLS5686W
PB02
Purchased Dec '07.

Hi,
Wanted to throw my hat into the conversation. I currently have three of the white dots, probably more showing as I am posting this. What a PIA!

Anyway, I really appreciate the work of all of you on here in solving this dilemma. I have followed from the begining and now feel confident (maybe) that it is part # 4719-001981 (Digital Light Processor) that I need and not part # BP96-01636A (DMD Board).

Is this correct? Also, the thermal compound that was mentioned to control the heat issue...where exactly are you guys putting this down?

Thanks in advance for your help.

4719-001981 should be the right part.

The thermal compound should make sense once you get it apart, but look at the picture I attached to this post:
http://www.avsforum.com/avs-vb/showp...2&postcount=64

The metal part in the middle is what the heatsink mounts up against. Between the DLP & the heatsink is a pad of thermal tape (mine stayed stuck to the heatsink). You can scrape that off and replace it with a thin layer of the new thermal compound.

PezJunkie...thanks for the quick reply and picture.

I will update once the fix is complete, good luck everyone and for what is worth I now have 5 dots....and...counting. They multiply very fast.

Thanks again,

I bought my HL-S5086W in Dec 2006, it has been in storage for a year. I have 3 stars and I guess they will soon start multiplying. I think I can do the fix. could you please give me the website for the part and what everelse I need. Thank you for your help in this matter. I have read the whole thread but forgot where the part # was listed.

You will need to check the version listed on the right side of the TV:

If you have a Version PB02 the part # you need is 4719-001981
If you have a Version PB01 the part # you need is 4719-001968

Get manuals and documentation here: http://www.drop.io/HLS5086W
You will mainly need "disassembly reassembly.pdf"

Where to buy:
www.samsungparts.com
www.partstore.com
www.encompassparts.com

PEZ, thanks for the reply. you have done a great job of being a great person by helping others.

Okay TripleTx or any other installer to make sure I got it...You need to remove the rear panel and then pull out the light engine and the DMD board (Type X) is part of the light engine and the instructions for the board separation starts on page 12-17 of the dissambly_reassembly pdf?

Thanks for helping with the big picture.....no pun intended.

Yes that is pretty much it... after removing the back panel (on mine it was just the lower half of the back panel), you then start following the instructions at 12-1-3 Separation of the Optical Engine. Once you disconnect the appropriate cables (mine were a bit different than the instructions) and after you remove the screws, the light engine should just slide right out on the tray it is on... you can than work with that whole unit separately starting with page 12-17. Just go slow and be patient with the connectors, they are latched and need to be squeezed with a bit of effort to be removed.

Good luck

Also, I wonder if anyone has some followup on thermal paste/pad application. When I replaced my chip the existing pad was partially disintegrated so when I reinstalled there was only about 30% coverage of the pad on the heat sink. I am thinking I can go back in and either apply paste or a new pad without doing a complete disassembly, I have seen the earlier posts on this but was wondering if anyone had some followon feedback before I proceed.

I would definitely remove the old pad and put down some thermal paste. A partial pad is possibly even worse than no pad at all, since it may be limiting the amount of contact between the DLP and heatsink.

Direct metal-to-metal contact is always going to be the best at conducting heat from the chip to the heatsink. The last thing you want is pockets of dead air in between the chip & heatsink, as this acts as an insulator.

Ideally you want a thin layer of thermal paste that is just enough to eliminate these air pockets by filling in any gaps/imperfections in the two surfaces that you're mounting against each other.

(Computer overclockers have been known to go to the extreme of sanding down heatsinks to be super smooth/flat and provide more direct contact between CPU & heatsink. Probably overkill for our application.)

First off, a big thanks to everyone who posted tips on this board. After reading through it, I ordered my part, which came today, and replaced the chip (I had the same snow effecT). Now that everything is put back together (except for the back panel), I have a new problem.

When I plug the power supply back in and turn on the TV, everything powers up (the lamp turns on, the fans spin) and then after about 3 seconds, it shuts itself down. I'm pretty sure that all the cables are plugged in properly (triple checked them) but it's possible I made an error out there somewhere. This is a problem that never happened before I took my TV apart.

Any help would be greatly appreciated. Thanks a bunch.

Now I'm off to go tinker with it some more...

Oh, and the front power button is flashing "Lamp" in green and "Standby/Temp" in red.

Ok, figured out the power issue -- the lamp cover on the back has to be put into place. There is a little switch that needs to be toggled for the TV to turn itself on.

Now however, everything is extremely blurry. I was very careful not to touch the DLP chip or the projector. I must have messed something up (the alignment?). Going back to read through the documentation, but any off-the-cuff help would be much appreciated. I'll post updates if I figure it out myself since I figure it may be helpful.

So -- I figured out that problem (the lamp cover must be plugged back to toggle a switch, otherwise the TV will power itself off) but have a new one.

The picture is extremely blurry. I figure I must have messed something up, though I was very careful not to touch the DLP chip or the projector. Any ideas, before I start to take the stuff apart again?

I'll still work on it, and post updates if I have a solution as I figure others may have similar issues.

So it's still out of focus -- I believe the alignment manual PezJunkie posted is for a slightly different model, (I have the HLS4666 PB02), and the focus alignment looks similar to mine. I twisted the ring, trying to focus it, but nothing changed, and twisted it to far until it fell out and I had to take that part apart to screw it back in!

Any ideas for the blurriness would be much appreciated.