Question about Mitsubishi WD-65833 65" HDTV

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WD-65833 Removed chassis as per service manual so I could replace the capacitors on the DM. I did not find the DM sandwiched between the boards. I did find the PWB with three (3) capacitors rated at 800uf/200V; all three had a cream substance (hardened) below them. Not sure if this is a problem or some type of thermal paste. Anyway, did not find four (4) 100uf capacitors, and ALL capacitors appeared to be normal. Is there any additional help that can be offered?

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The Main Board contains the DM circuitry and does not fail in the same way as it's predecessors. What is the unit doig?

Posted on Jul 17, 2009

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How to replace the dm in wd-52525


The DM is the second board inside the Chassis block directly underneath the FMT board. But replacement DM boards if still good are very expensive your better off replacing the 4 capacitors that fail on the DM.

Apr 03, 2013 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Replace capacitors for hdtv


The model indicated has two boards in the middle of the signal chassis sandwiched together with dozens of surface mounted caps that fail--only someone with advanced soldering and other skills should even attempt this repair in THIS model.

There was a program where the entire chassis less the light engine was available on an exchange basis--about 250 for that.

Jun 16, 2012 | Mitsubishi WD-62525 62" Rear Projection...

1 Answer

Where is the DM Module on a Mitsubishi WD-62528?


A few pieces of advice--the boards are sandwiched in the main signal chassis and not easy to get at.

If you have replaced those 4 in the actual power supply they do for some models sell the entire signal chassis (has almost everything except the optical light engine) for about 250 exchange.

Let me know what issues you have and I may have suggestions--this model has one very odd issue that is simple---picture gets so dark it is hard to see--not the lamp but easy to fix.

May 26, 2012 | Mitsubishi WD-62528 62" LCD HDTV

1 Answer

Want to replace caps which board is the DM board?


Once you take the shield assembly off, you will see a board, I believe it is the DM Board board. There are four Capacitors grouped together probably rated at 35v 1000 mfd, 105 degree. They should be replaced with 35v 680mfd,105 degree Capacitors. Now once that is done, there is another board under that one. This is the Format Board. It also has 4 Capacitors that should also be replaced. They are the same value as the first Board and should be replaced with the same 35v 680mfd, 105 degree Capacitors.
Please note the Flex connectors at the bottom of the DM and Format Boards. They may not be available from Mitsubishi any more so be gentle with them and make sure the are installed properly when reinstalling the Boards back into the chassis. There is one other Board you should look at. The Power Supply Board is the board on the back of the chassis and also has a number of Capacitors that fail. Most all of the Capacitors that fail through out this chassis will have bulging tops. So any you see bulging, you should replace whether they are on the DM, Format , or Power Supply.
I hope this helps,
Skyassoc

Jan 07, 2010 | Mitsubishi WD-52725 52". Rear Projection...

1 Answer

Hi, I have a Mitsubishi WD-52525, and have the Green Light of Death. I plan on replacing the capacitors, and have the Power Chassis out of the TV. However, I am having issues extracting the DM module...


The DM is the second board in the chassis from the right side looking in the rear. The first board is the FMT. The second is the DM, third is the Signal and the one which is sideway across the front is the Power board. The Chassis metal shields have to be removed to access the boards.

Dec 02, 2009 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Mitsubishi wd-52525 dm board capacitor replacement


Good day, husker_shoe;
Good question, but I'm not THE FAMOUS "TECHMAN" but I will try to help anyway. The DM board is normanlly on the left side TV looking from the back. It has a shield around it, remove. The caps are big and black, they look the replacements(only ones on board). Here's what says about this issue:

If the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). (LED does not stop blinking after plug in) On the DM
Good Luck, big IRISH. ps hope this helpful!
PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C).
It is not an easy job, it will take some time but since you have it apart there is another problem that will accure so might as well do this too:
Tile or block pattern with no video or OSD. Check D8F00 and D8F01 part # 264P828010, also check C8F26 and C8F29 part # 141P148000 (1 uFD, 25 V) on the FMT PCB (part # 930B924002).
All the parts have location numbers like C8F29 that will tell you what and where these parts are.
Good luck, big IRISH. PS; I hope this helpful.

Jul 16, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

No DM Board on WD-65833


The Main Board contains the DM circuitry. And you are right, this board does not fail in the way of its predecessors. What is the unit doing?

Apr 30, 2008 | Mitsubishi WD-65833 65" HDTV

1 Answer

DM removal


You will need to remove the entire chassis block as outlined in the manual. DM stands for digital board. It will be listed in the manual as PWB DM its sandwhiched in between other boards inside the chassis . Which is actually a metal box that will need to be disassembled then each board removed to get the DM . The DM is usually the bottom board. I dont have access to the WD65833 sertvice manual, but I am famillar with it. The DLPs are all simallar the entire Chassis block needs to be removed. Hope this helps if you need more info, let me know.

Apr 07, 2008 | Mitsubishi WD-65833 65" HDTV

1 Answer

WD-65833 Flashing Green Light/Will not turn on!


its an easy repair however i would recomend not even attempting the repair without the service manual as the DLP chassis is completely incased and you will need the info just to get the chassis out , That will explain exactly how to disassemble. once disassembled there are 4 100uf capacitors that are causing the problem. If you would like the full service manual for your set let me know and I will post a link where you can get it emailed and they will provide free support to help you do the repair.

Mar 29, 2008 | Mitsubishi WD-65833 65" HDTV

3 Answers

WD-52525


You will need the service manual to do this repair. I happen to have it, as this site was suppose to put in the pictures and things to explain that a lot of TV sets are still using this DM board, but they are building them differently. Just follow the directions in the service manual on how to remove the DM board and then follow the directions in the article on repairing the DM board. I will need your e-mail address to forward this service manual to you. Good Luck

Jul 07, 2007 | Mitsubishi WD-52525 52" Rear Projection...

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