Question about Sony KP-51HW40 51" Rear Projection Television

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Cleaning black front panel

How can I remove the front black panel of my tv for cleaning. My mother sprayed it with a solution and now there is a stain on the mesh.

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Depending on what type of screen you TV has, many have plastic frenel screens that react to certain cleaners such as ammonia and alchohol based. These compounds can permanently damage the screen causing a cloudy area where it was sprayed. Unfortunately nothing can be done except to replace the screen.

Posted on Aug 08, 2008

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Troubleshooting


Over 4 years old buyed convex topped capacitors to find ? if not ... then
Buy a canister cold spray open the backsite take a chair and place a mirror in front of your tv spray on the components spray on the passive components like capacitors or on the power supply/ backlight inverter and t-con board . if the right place is sprayed you see something happen on the picture.

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57h94 hd tv,need to clean picture tube


Hello, first you have to uplug the tv, then remove the speaker grill (I think that one just pulls off the front, but some models had 2 screws on each side on the rear edge of the cabinet) once the grill is removed you will see either 4 or 6 phillips head screws along the bottom of the screen frame, remove them and unplug the control panel plug (may be 2 plugs). when that is done raise the screen assembly straight upwards about 2or 3 inches and pull straight out and carefully set aside. Use a quality glass cleaner and a lint free towel's, spray the towel with the cleaner and wipe the lens of the 3 crt's that face the mirror and dry them with a clean towel. Then clean the mirror the same way, do not spray the mirror with the cleaner. when everything is clean, replace the screen by holding it against the front of the set but about 3 inches above the top, press it gently inward on the frame as you press it downward until it is flush with the top of the cabinet, check to make sure it is flush with the sides of the cabinet all the way down, if not re-raise the screen and lower it making sure that it's flush on both sides. Re-plug the control panel , and re-install the screws and the speaker cover,,,,,tks

Nov 05, 2013 | Toshiba 57H94 57" Rear Projection HDTV

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Cleaning lenses on projection tv


Have the set unplugged please.

CAN BE DONE FROM REAR--from the front is a bit tricky and dangerous---from rear with rear cover removed locate the three large black lens( hard to miss them) and clean them with a lens cloth or a paper towel with glass cleaner sprayed on it.

Depending on how much dust===should be done one time a year.

Apr 28, 2012 | Hitachi 51F500 51" Rear Projection...

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

My child sprayed something on the screen of the tv and now it has a huge black spot in the corner of the tv. I was wondring if there was a way that you can take off the front screen to wipe it out.


Yes the screens do come off so you can clean in between the layers. But a service manual is reccommended to remove the assembly. But I will post the proceedure below for you.slinteriors_8.jpgslinteriors_9.jpg

Jun 24, 2011 | Mitsubishi WD-52631 52" Projection HDTV

1 Answer

Black screen, no picture


Something wrong with the Inverter boards. Part# 75012523 cost approx $150.

Apr 29, 2010 | Toshiba 32AV500U 32 in. LCD HDTV

1 Answer

My Sony KDE42xs955 was cleaned with windex and now has water marks on the screen that I cannot get off is there a trick to removing these? They look like the marks left on a windshield after going through...


Hello,

Assuming you have removed the coating with the cleaner, (TV is much brighter where the marks are)

If you have home insurance then now is the time to call.

The TV, being an LCD, has a coating on the front, kind of like paint, but not. It is what allows an LCD TV to produce "Black", by blocking the light.

It is not easily replaceable as it is sprayed on at the factory.

Sorry.

Sep 07, 2009 | Sony Televison & Video

1 Answer

Wrong Chemical Cleaner on 60 inch DLP TV


Hi There,

Unfortunately, I think you may be out of luck. If you spray a screen directly you are taking a chance at killing your TV. You're actually pretty lucky that it still works. Some chemicals can eat right through or seep through edges and corners and ruin the life of your TV. I am not sure if Mr Clean contains alcohol, but that is the last thing you want on any screen. I would suggest trying to clean it off with an alcohol free solution for HDTV screens only or calling Mitsubishi immediately and see what they have to say.. Here is a similar product for what I am talking about:
http://www.meijer.com/WireLogic_CleanScreen_690020200.pro

Good Luck and Happy Holidays..

Dec 23, 2008 | Mitsubishi Televison & Video

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