Question about LG Televison & Video

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I want to replace an optical engine unit but I can not take off the front screen panel because it still have something stick together at the bottom. I want the instruction step by step how to disassemble the old unit and replace with the new unit.Thanks. Note: LCD Projection LG MW60SZ12 model

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  • nhudaosa Sep 25, 2009

    Thanks for your mail. Yes I have download a service manual from nodevice.com last night. But it can not help, this document just have a panel diagram and a description list only. The book did not show how to disassemble the optical engine. What service book in you side? It explain how to do? Please let I know. Regards. Bach Tran

  • nhudaosa Sep 26, 2009

    Dear Ginko
    In Australia, hundred of consumers have been changed the light engine. I just got a complet optical engine unit. I think I can do the job easy but it did not. I know every technician need to have the service book, with the full instruction step by step to disassemble the rear / front cover.
    If you can not help me. Please ask your boss and then give to me the new advise,other way please transfer me to another expert, who have the experience for service this job before. Regards.


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You will have to remove Back of TV NOT FRONT Screen ! (1) Get paper ,pencil, tape write on paper where each and every connector goes . Color Markers are better example ab-ab cd11 -cd11 ect... of after you have everything marked remove old Light engine, carefully put in new one then begin hooking up all connectors Before you turn TV ON Do a Double Check to make sure it all is connected correctly Light Engine Slids into Holding brackets

Posted on Sep 26, 2009

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  • LG Master
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You need the service manual with schematics.
The service manual is not available for free download.
You can get a copy paying a small subscription fee on this website.

Posted on Sep 25, 2009

  • Ginko
    Ginko Sep 25, 2009

    The optical group often is considered not serviceable. That means that you do not find troubleshooting diagrams to fix it. However a full service manual should show full schematics.


    I will see if I can find a complete service manual and I will post back.

  • Ginko
    Ginko Sep 25, 2009

    Hi did some research. The LG service manual will say on front : Service Manual CHASSIS RE-01JB.


    This is the complete service manual, where you will find light engine schematics.
    Other documents , like service bulletins may be incomplete.


    Many manufacturers consider the light engine not serviceable.


    If the service manual does not report the information needed, then the diagrams for the optical group are not available, since they had never been published by manufacturer.

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Posted on Jan 02, 2017

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Replacing a power switch on a gateway tower


The plastic front of your computer is the Front Panel

http://support.gateway.com/s/PC/R/1009566/1009566nv.shtml

Slip this off to access the Power On Button assembly, which has the Power On switch inside it,

Outside view,

http://support.gateway.com/s/CASES/GERSHWIN/8016200R/8016200Rmv.shtml

Rear View,

http://support.gateway.com/s/CASES/GERSHWIN/8016199R/8016199Rrv.shtml

-> FOLLOW Anti-Static Procedures -> BEFORE reaching inside, your unplugged from power, computer.
If you do not know, post back in a Comment

Now look at the Rear view of the Front Panel again.

The LEFT Side Panel removes.

Looking at the Rear view of the Front Panel; note that the LEFT side of the Front Panel, is towards the Bottom.

See the three TABS sticking up along this edge?
One at the Bottom, one in the Middle, and one at the Top.

Flat plastic TABS formed out of the Front Panel itself.

Another point of view.......
The metal framework you see that the CD/DVD drive/s are in, is the Optical Drive Bay.

Look at the Optical Drive Bay, and towards the Top/FRONT.
See that flat TAB sticking in from the Front Panel?

Now come down to the Middle of the Front Panel.
See how out at the bottom of the Optical Drive Bay, there is a TAB sticking in from the Front Panel?

See the TAB at the Bottom?

They hook on the metal framework of the computer case.
They go through SLOTS in the metal framework.

The Tabs are pressed to the Inside of the computer case, OR to the outside of the computer case.

This action brings a hooked end on the end of the TAB, to the Middle of the slotted hole it\'s in, and then the Tab is free.

Suggest start with the Bottom TAB, press on it when hooked end is free of slot; then do the same for the Middle TAB.
Now perform this on the Top TAB.

The TABS are pressed to the inside, or to the outside, and pressure is put against them towards the Front Panel.
Push on the Tabs, to push the Front Panel away from the computer case.

Once all three TABS are free, the Front Panel will swing out, and remove.

Power On switch is mounted to this metal case,

http://support.gateway.com/s/CASES/GERSHWIN/8016038R/8016038Rmv.shtml

Me?
I would open that case, and take the Power On switch itself, out.
Then see if I could find a replacement, or one that I could live with,

http://www.ebay.com/sch/i.html?_nkw=atx+power+switch

Direct link to Hardware Reference Guide,

http://support.gateway.com/s/Manuals/Desktops/8512041.pdf

Let\'s see if it works.

If not here is the Gateway Support page for it.

http://support.gateway.com/s/PC/R/1009566/1009566ul.shtml

8512041 - Gateway Hardware Reference Guide (5-Bay uATX Case)

Go to Pages 37, and 38. (Top of Adobe Reader in page number box)

For additional questions please post in a Comment.
Regards,
joecoolvette

Apr 19, 2013 | Gateway GM5472 PC Desktop

Tip

Sony projector has yellow or blue dots.


You turn on your big Sony projector one day and see yellow or blue dots on the screen. No amount of adjusting will get rid of them. What can you do?

You could replace the optical engine because that is the problem. The crystal panels are defective and starting to go bad. Alot of these units were made and they are failing on a regular basis now. If you want to tackle replacing the optical engine I have a tip at http://www.fixya.com/support/r4251975-replace_dlp_light_engine which will help with the removal and replacement as well as where to get the parts at the best price. That will be the sticking point. The cost of an optical engine can be $350.00 USD or more (think Sony).

Another option would be to go to this site by Steve Linke at http://sites.google.com/site/sonylcdrptvproblems/ which is well written and describes the problem in detail as well as options which you may have with Sony.

In the end you will have to decide if you want to spend more than $350.00 USD on an optical block which may go bad in several years.

Thanks for using FixYa and for the great rating. Please consider a testimonial. Thank you.

hardrocko

on Jan 17, 2011 | Televison & Video

1 Answer

I am 99% sure I have a bad fan. TV was turning off (probably overheating). We replaced the lamp (for the fourth time), but the fan continues loudly when the set is turned on. Question-- Can I replace...



Tools/Supplies:

• Phillips screwdriver (magnetic tip)
• 1/4" nut driver
• 1/4" wrench, small adjustable wrench, or stubby Phillips (to access screw in tight spot)
• Canned air with extender tube, a few cans
• Optical-quality microfiber cloth
• Clean, lint-free cloth
• Small brush

Precautions:

• Do not use any cleaner that contains ammonia. A clean lint-free cloth dampened with water was adequate for me.
• To prevent over spray, do not spray any cleaner directly on to any TV part. Spray on to rag only. (I only used a dampened rag to clean plastic and metal surfaces; no electronics or optical surfaces.)
• Use only an optical quality microfiber cloth and/or canned air to clean the light engine lens, the mirror and the inside surfaces of the front screen.
• Exercise caution using canned air. Do not tilt the can and allow any liquid propellant to escape. I had a few full cans available, and swapped to a new can often.
• Keep screws removed from each panel in a different cup. Most are different sizes.
• When disconnecting wiring connectors, note color codes for connector orientation when reconnecting. Most connectors only install in one orientation, but it's not clearly obvious.
• If contacting any circuit boards/wiring connectors, make sure to touch the metal frame first to discharge any static charge.

Disassembly Instructions:

1. Insure TV is powered off and allowed to cool at least 2 hours (overnight if possible).

2. Open and remove the Lamp Unit door on left side of TV. Using a Phillips screwdriver, loosen the 2 screws on the lamp unit and carefully remove the lamp unit.
Clean lamp unit, using microfiber cloth on the lens and set aside for reinstallation.

3. With the lamp unit removed, you can see the light engine's color wheel through the small hole. I covered this hole with tape to prevent any dust from entering during my cleaning.

4. Remove the lower rear cover (2 screws on each end and 9 along the back panel).

5. Remove the cover from the Input/Output jacks by removing the 7 silver screws securing the cover to the Input/Output modules and sliding the cover off the power cord grommet.

6. Remove the front pedestal cover as follows:
Note the blue, red and grey wire harnesses on the right side leading to the front panel controls, AV-3 jacks and PC slots. Loosen and remove these wires from their wire ties.Grasp the pedestal cover at the ends and gently pull outward. It is installed with quick-release pins and should release easily.Gently pull the pedestal cover out, being careful to guide the wiring.Carefully disconnect the 3 wiring connectors, noting the color code for reconnection.In preparation of removing the front screen, 2 hidden screws must be removed. These 2 screws secure the bottom corners of the front screen and are installed from the back.

7. Remove the plastic housing where the lamp unit was removed:
Loosen the wire tie and remove the wires from the top of the plastic housing (these wires go to the lamp door switch).Remove 2 screws securing plastic housing. One on left side and other in base on right side (with limited space available, will need 1/4" wrench or stubby Phillips).Slowly pull housing from TV, until you can reach the connector to the lamp door switch. Note color code and disconnect wiring connector (may be easier to pull some wire through the hole and lift upward to remove connector).The front panel screw can now be seen in a recessed hole. Loosen this screw. (I did not remove the screw completely, to aid in reinstallation. Otherwise, a magnetic Phillips screwdriver may be needed.)8. From the area of the front panel wiring ties the other hidden front panel screw can be seen in a recessed hole. Loosen this screw.

9. Remove 11 of the 12 screws along the back of the TV securing the front screen, leaving one loosely installed at the top.

10. Remove 4 of the 5 screws on the front of the TV, at the bottom of the screen.

11. While holding the screen at the top and bottom, remove the two remaining screws, and gently lift and pull the front screen panel away from the TV.
Store the front screen assembly where the inside surfaces can be cleaned with the microfiber cloth and/or canned air.

12. Reassemble the TV in the reverse order, remembering to remove the tape from the hole covering color wheel, if installed earlier in step 3.


There are 3 fans to clean:
The large Lamp Fan behind the lamp and light engine assemblies is clearly visible.There are two smaller fans mounted next to each other. One fan is mounted between the cable card slot and the light engine and the other fan is mounted just to the right directly on the light engine assembly. It's somewhat inaccessible without removing the light engine, but using an extender tube on your canned air, it is easily cleaned.
The lens of the light engine will have the most dust. Clean with canned air and the microfiber cloth. Use a corner of the cloth to reach beneath the plastic tabs covering the lens.

The mirror may have a few dust particles. Gently wipe with the microfiber cloth and use canned air. Hope this helps,
TechGuy21
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Jul 04, 2011 | Toshiba 62HM95 62" HDTV

1 Answer

I have a Hitachi 50v710 it has a yellow tint in the middle of the screen can this be fixed thanks


This tv is an LCD projection one. in it the image is generated this way: a bulb makes the light; this light is divided then passed thru 3 small LCD screens; the 3 pure color images are mixed together by a prism then passes thru a set of fine plastic lenses (this is called the optical engine) ; from there the final image is projected on a screen.
The entire image quality is determined by the quality of the optical engine - if something goes wrong with it it's clearly visible on the screen. In your case the heat of the bulb has deformed the first lens, and that has caused optical aberration - color shifting.
This is fixable, the optical engine will have to be replaced - you can't replace just a single lens, it's a sealed unit. Unfortunately it's not a practical solution: a new optical engine will cost you over $800.
Use the tv as is until you can save enough for a new one.

Nov 23, 2010 | Televison & Video

1 Answer

I have a blue mark on the corner of my screen and several blue specks throughout the center of the screen. I changed the lamp thinking it was that but the blue is still there. What else could it be?


This is optic unit (light engine) problem, it has 3 color lcds and blue lcd along with related UV filters became defective and causing blue mark on front screen.
Need to replace optic unit (light engine) to resolve the issue.

Aug 20, 2010 | Sony Grand WEGA KDF-50WE655 50" Rear...

1 Answer

I recently replaced my lamp for my sony wega set, October 20th, and today started to see a slight purple bluish 'cast' 1/4'' high and about 12''s wide at the bottom of my screen.


Hello: The Blue LCD has failed. This unit has three small LCD screens inside the optics engine. This problem will get worse as time passes and will spread even more. The only way to resolve your issue is to have the optics engine replaced. Fortunely optics engines are fairly cheap these days as televisions become more advanced. A good place to start looking for one is http://www,tristatemodule.com
Just in case you don't know what one looks like the picture on the first page of this site is a Sony optics engine. These engines are either rebuilt one to ones taken out of working sets that had bad or broken screens, and they do come with warranties.

Nov 20, 2009 | Sony Televison & Video

1 Answer

Blue lines at screen bottom


Hello:

Your Optics engine will need to replaced The blue LCD screen inside the optics engine is faulty, and will have to be replaced

Please leave a comment if you need more assistance.

Thxs

Oct 01, 2009 | Sony Grand WEGA KDF-55WF655 36" Rear...

1 Answer

Relaced bulb,now have problem with picture


doe sit seem like there is a "glow" around lightly colored items on dark screen. if so suspect the optical engine has internal contamination( dirt or dust) it is almost impossible to clean it then put all back together and not introduce any other contamination i suggest replacing optical engine under these circumstances.

Mar 27, 2008 | Mitsubishi WD-57731 57" Projection HDTV

1 Answer

Liquid in screen


The screen is two separate pieces of plastic. One is a fresnel screen and the other is a lenticular panel. They act together to disperse the light evenly. Yes the front bezel will come off and the screen will come out. But they are taped together with just a slight air gap between them. The windex was wicked up between the two panels by capillary action of the fluid and space between the panels. Trying to take the screens apart would be easy. The problem is the grooves in the two panels are almost microscopic so any attempt to rub them will leave a mark. Plus unless you have some kind of clean room the slight dust particle or hair that gets left in there will stick out like a sign when it is reassembled and turned on. The only hope to try to correct this is to removed the bezel and then the screens but do not separate them. Then wedge some tooth picks in the very bottom of the edge where the stain is being careful not to push the picks up into the viewing range. Then with a spray bottle of just water try to rinse the windex and wick up the water with a wedge of paper towel just inside the edge. The same action that got the water up there will wick it down.Repeat this several times to delute the windex as mush as you can. It may not get it all away completely but it should make it livable. After the last rinse leave the picks in and left the panels air dry before putting everything back together. The most IMPORTANT thing not to do is to lay the panels flat and flex them, this will allow the two grooved panels to chaff one another and they will be destroyed.

Feb 08, 2008 | JVC AV-56P575 56" Rear Projection...

1 Answer

Screen problem


your unit needs the optical engine cleaned(the lcd panels).This should cost about 300 at a local tv shop

Mar 22, 2007 | Sony Grand WEGA KDF-42WE655 42" Rear...

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