Question about Mitsubishi WD-52725 52". Rear Projection HDTV

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Bad light engine

I had a tech come out and replace the ballast , check my chassis , and he told me my light engine is bad , he said i may just need the color wheel , he said it seems stuck or something , he is not mitsubishi certified , but he checked my power board and all , i get the 34 lamp abnormality error , can anyone offer any assistance to this , thanks ,

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Re: bad light engine

Did you replace the bulb? Your supose to replace the bulb when you do the ballast but a lot of techs do not.

Posted on Jan 09, 2008

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Hello my name is Devin, I have a wd-65735 model and I just purchased it off of a friend and braught it home. He had told us from laying it on its side while bringing it home it said in the guide to let it...

Caveat: I am not a tech, I just read through the Mitsubishi service manual, and have worked on different model TV that I have owned (older model of this one) I am a little unclear on the second set of lights but I think the combination *may* indicate that the lamp fan is not starting (there are two fans though), if the blinking red is the status light. It is possible the connector for that got jostled during the trip, something fell into it from being on the side (wire or loose something) and is blocking it from spinning now, or a module unseated a bit,and is loose, or the lamp is no longer seated correctly (though the lamp light does not appear to be on) or none of these. :) These are just guesses.
Be careful if you open it up, due to potential for shock. Wear gloves, and power it down first (then unplug). Reseat any fan connectors.

Google: I used "wd-65735 status lights" to find a service pdf , it's for V39 chassis (several models)

From page 24 of Service Manual :

3. Error Code Operational Check Note: The TV must be in "Shut Down" and not have been switched Off, to perform the Error Code Opera- tional Check. When the TV is switched Off, the code automatically resets to "12" No Error.
Pressing the front panel "INPUT" and "MENU" buttons at the same time, and holding for 5 seconds, activates the Error Code Mode. The "TIMER LED" flashes denoting a two digit Error Code, or indicating no problem has occurred since the last Initialization.
Note: The front panel buttons must be used, NOT those on the Remote Control.

  • ThenumberofflashesindicatesthevalueoftheMSD(tensdigit)oftheErrorCode.
  • Theflashingthenpausesforapproximately1/2second.
  • TheLEDthenflashesindicatingthevalueoftheLSD(onesdigit)oftheErrorCode.
  • The Error Code is repeated a total of 5 times. Example: If the Error Code is "23", the LED will flash two times, pause, and then flash three times.
Page 24
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / WD-73735 / WD-73736 / WD-73835 / WD-73C8
4. Error Codes
The Error Code designations indicating malfunction, or no malfunction, are listed below:
ERROR CODES page25image3968
Most Likely Cause
No Error found
Communication loss, TV Micro - Engine (3.3V-ENG-SDA & SCL)
Engine Failure
Engine will not accept data (ASIC-READY signal from Engine is not detected).
Loss of 12V from PWB-POWER (Loose PE or PE2 connector); Bad Color Wheel (Loose J6 or J7 connector); Engine Failure
Lamp cover is open.
Lamp Cover Switch; Loose CD connector
Lamp turns Off while the TV is playing. Lamp failure
(Lamp Enable signal from engine is lost)
Lamp Cartridge Failure
Exhaust Fan failed.
Loose J4 connector
Engine (DMD) fan failed.
Loose J5 connector
Lamp temperature abnormally high.
Poor Air Circulation; Loose J3 connector
DMD temperature abnormally high.
Poor Air Circulation
Standby Supply Short is detected. (5VS or 3.3VS)
PWB-MAIN Failure
Sirocco fan failed (Lamp fan).
Loose J8 connector
Check for disconnected DVI cable between PWB-DM and Engine. (Engine pulls DVI pin 14 Low)
DVI Cable unplugged
PON-SHORT 3.3V switched supply short
PWB-MAIN Failure
Ballast communication problem (ballast to chassis)
Loss of 340V from PWB-POWER (PL or CJ1 connector); Loose FB or CJ3 connector; Ballast Failure
No LAMP-EN output from the engine to the ballast
Bad Color Wheel (Loose J6 or J7 connector); Engine Failure
Lamp did not turn on at P-ON sequence
(No Lamp inserted)
(Disconnected cable between ballast and lamp) (Lamp-Enable goes to DM but not to Ballast)
Loose CJ4 connector;
No Lamp Inserted;
HV connection or lead wire to lamp; Lamp Cartridge Failure
Code 34(1) - Lamp Enable is generated to activate the Lamp
Code 57(2) - Lamp Enable is generated during P-ON sequence, but no Lamplit signal is received from the Ballast. Code61(3) -NoLampEnableisreceivedattheDMandBallast.
Code 66 (4) - Lamp enable is received at the DM but not at the Ballast.
4. Error Code Log
The Error Code Log - may be helpful to retrieve the code for an error the occurred in the past. To access the Error Code Log: Press <MENU> <3-5-6-4>

Oct 27, 2014 | Projection Televisions

1 Answer

Picture has progressively darkened over the past few months. Replaced the lamp which did not help. Next place suggested replacing te lamp ballast which did not help either. Now I'm being told it s

You might want to talk to JVC as this model had all kinds of issues--missing any color, picture inverted or backwards just to mention a few.

The solution was to connect it to a computer and use a jig from JVC and download two up grades on sd cards and install them manually.

I mention this as the Light engine in the set communicates with the main chassis and you in fact may have a issue with that.

At least make a call to JVC---saw about 40 sets with this model where this cures all sorts of communication issues--the engine if "set" wrong could easily cause this problem.

Dec 19, 2012 | JVC HD-52G786 52" Rear Projection HDTV

1 Answer

My panasonic power ligth blinks green every second for about a minute and then blinks red. I replaced the bub and it still does the same thing. I have no illumination on the screen

There's is ballast kit for this TV I fixed too many of these.
Be very carefull! not to damage a very fragile flat cable when you try pulling the Boards or Chassis. This cable is on the left hand side of the light engine. The ballast kit part# is LSUC0022.
You may wana hire a TV tech if you are not an Electronic technician.

Best of luck

Nov 03, 2011 | Panasonic PT-50LC13 50" Rear Projection...

1 Answer

Own a mitsubishi WD-52525 52 in. Rear Projection HD TV. Already been through the "blinking light of death" problem about 2 yrs. ago. Now have a steady red lamp light. Purchased new lamp, installed, and...

You have to take the TV apart. Pull the electrical chassis out and look for bad electrolytic caps on the boards. sounds like caps on the power supply board are bad. You can tell if they are bad by the fact that their tops are puffed up and they may or may not be leaking brown fluid. Compare them against the other caps on the boards and you will see how they have flat tops.

BUT before you take the TV apart you can check the error codes by pushing "menu" and "Device" at the same time and holding for about 10 seconds. The status light will blink two numbers. ex. one flash pause two flashes is 12 Error Code Probable Cause

12 No error detected
22 Recovery from momentary Reset
32 Lamp Cover open
33 Air Filter Cover open
34 Lamp abnormality
35 Chassis Fan failure
36 Exhaust (Back Cover) or Lamp Ballast Fan failure
37 Engine (DMD or Lamp) Fan failure
38 Excess Lamp Temperature
39 Excess DMD Temperature
41 Short Detected
44 DVI Cable (between Chassis and Engine) disconnected

or use the table below -


You can buy replacement caps from Mouser electronics online

Sep 11, 2010 | Mitsubishi WD-52525 52" Rear Projection...

2 Answers

I replace the lamp into my mitsubishi 61 inch tv lamp number 915P28010 however the lamp took to the tv. Now when I hit the power button the tv will not come on but u can hear the fans runnin. I had someone...


is your TV making any strange sounds like clicks or any thing else?

YES? ....making noises is the "Ballast"


if you see half of your tv black or out of shape is the light engine!


so i think it's going to be the ballast..

let me know i can help you more..

good luck!

Dec 31, 2009 | Projection Televisions

1 Answer

How to replace lamp ballast 46hm84

Assuming you can get the part, here is the procedure to replace the lamp ballast:

1. Make sure TV is un-plugged and the lamp has cooled for at least one hour before continuing.

2. Place the TV on a flat surface with sufficient space to the rear to allow you to slide out the chassis.

3. Open and remove the lamp access door on the left-side of the TV (facing the front) by loosening the thumb screw. Behind the door you will find the lamp assembly which must be removed by loosening two screws (one on either side of the lamp base). Pull out lamp unit, careful not to touch the lamp or bump the unit. Set aside.

4. There are 13 screws that hold the lower-rear cover onto the cabinet. Use a 1/4 inch nut driver to remove these screws. Nine of them are along the top and bottom at the rear and another 4 on the left and right hand ends of the cabinet just to the rear of the front panel.

5. Next, note that the chassis is in two sections; left and right. The lamp ballast is part of the light engine assembly that is on the right chassis. You will save yourself much grief if you slide out both left and right chassis assemblies. There are 4 screws through the jack panel that hold the left-side chassis to the cabinet. Remove these screws. Also, there are two screws mounted vertically (one on either side) of the jack panel that hold the left-side chassis to the bottom of the cabinet. Remove these screws as well. Note that they are different from the other screws.

6. The right side of the chassis is held by 5 screws. First, remove the three screws that are holding the verticle metal brace and remove the brace. Note that there is a cable tie connected to this brace. Be careful not to cut or exert too much pressure on this cable tie or the cable running through it. Next, remove the remaining metal screws holding the right chassis.

7. At the top of the open cabinet just behind the metal brace that has need removed, you will see another metal screw that holds a light shield in place. This shield has several small wires that run through guides. Carefully remove these small wires from the guides remove the screw and gently remove the shield taking note how the shield is supported so you can re-install it again easily.

8. At the left side of the jack panel towards the front of the cabinet, you will notice some wire guides with wires routed through them. Carefully remove these wires from the guides so you can pull out the chassis without putting strain on the wires.

9. CAREFULLY, start to slide out both chassis sections, left and right. Be careful not to pull any wires. If you notice a wire that is becoming tight, stop and make sure you take the strain of off the wire before continuing. You will most likely not be able to fully remove both chassis. You will not have to in order to replace the ballast.

10. The ballast assembly is located in the right-rear portion of the light engine assembly. It is held on to the circuit board by four plastic posts and retaining clips, one on each corner. The projection lens is part of the light engine assembly and is exposed. DO NOT TOUCH the lens with your fingers or tools. Before you remove the ballast, you must remove a metal piece that covers the heat sink. There is one screw on each side of this cover. The one on the left is difficult to reach with your fingers so use a magnetic screwdriver if you have one. If not, use some kind of sticky substance on the point of the screw driver so the screw will lift up with it. Remove the metal cover. Next, remove the two screws that hold the brown lamp socket to it's base and carefully remove the lamp socket. Also, there is a small white cable connector on the right-rear section of the ballast that needs to be CAREFULLY removed. Do not pull by the wires; use a needle-nosed pliers to grasp the plug and gently wiggle if off the connector. Gently move the white plastic clips at each corner and lift off the ballast assembly.

11. When installing the replacement ballast, be careful to gently seat the ballast by exerting pressure only on the four corners where the posts are. In this way you won't crack the circuit board. Replace that small cable connector, the lamp socket (it's key-wayed so it cannot be installed wrong), and the metal cover over the heat sink.

12. Take you time and follow your steps in reverse order. The both sides of the chassis must be slid into the cabinet together to avoid too much tension on small wires. Notice that there is a verticle tab on the light engine chassis that must be aligned on the right side of a veticle guide that comes down from the top of the cabinet enclosure. If you do not have the tab on the right side, the chassis will not fully seat back into the cabinet. Replace the light shield, route the small wires through the guides and also those on the left side of the jack panel, replace all screws and braces.

13. Replace the lamp assembly and replace the lamp door and hand-tighten the thumb screw. The set should fire up. If it does not, the problem may be with the light engine in which case it will not be worth the expense to fix.

Good luck and take your time.

Jun 08, 2009 | Toshiba Projection Televisions

1 Answer

How do I know if it is L6 or L3 chassis

you need to look on the right side of the set (facing the front of the set) for a small label that says
model code...
serial number..
if the version number is blank or PW01 you have the
L3 chassis.
if it says PU02 then you have the L620 chassis
also the L3 chassis has the ballast on a slight angle and the L620 has the ballast straight.

Dec 29, 2008 | Projection Televisions

3 Answers

Mitsubishi wd 62525 chassis

I was told there was a bad batch of capictors so we reaplaced all of them and still the blinking green light ,and no tv still help bagelbaker77@yahoo

Jun 04, 2008 | Mitsubishi WD-62525 62" Rear Projection...

1 Answer

Replaced Lamp to no avail

That problem is caused by two bad 100Uf capacitors on the PWB . you will need the manual to be able to get the chassis out and I dentify the correct board. Go to this link get the reapair manual they will give you free tech support and when they email your manual ask then if you can have Sonny for your free support. He can fix that chassis in his sleep, and he will tell you the exact capacitors that need to be changed and you set will be as good as new. heres the link

Apr 15, 2008 | Mitsubishi WD-52525 52" Rear Projection...

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