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How do I remove the outer case, shell, on a Samsung hc-r4755w projection TV? Need to get to the back of the screen to clean it, cat puked down front of TV and got behind screen

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There are two screens back to back and I think if you look from back with rear cover removed you will find the debris is between them.

Not going to be easy or simple to deal with.

Posted on Oct 26, 2012

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Posted on Jan 02, 2017

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SOURCE: Philips 50p8341a 50 in. projection

i have a 60 inch all i did was take the tub off of the back and use a duster to remove all of the webs and then use a dust free cloth and some windex and clean the bulbs

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SOURCE: samsung HC-p4241w- replacement bulbs/screen

http://www.fixyourowntv.com/projectionclean.php

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SOURCE: I have a Samsung rear projection 42in. tv, the

This is evidently a CRT-type projector TV (the owner's manual provides a convergence procedure and warns against operating the set near magnetic field sources - these distort the picture in CRT displays - but has no mention of changing lamps as used in other types). The first thing to check is whether the CRT coolant fluid has discolored with age or algae contamination. This can be determined by visual inspection of the top of each picture tube.

Inspection procedure
CAUTION: there are potentially lethal voltages present inside the set, even it when it is turned off. Some components, including the picture tubes, can hold a charge for a time after the set is unplugged, and some parts can be ruined by static discharge from your fingers even if the shock is too small for you to feel it. Bottom line: don't touch the circuitry unless you know what you are doing.

First, unplug the set, and remove the back. Look for the three picture tubes (sometimes called "jugs" or "cannons") pointing up towards the curved and faceted mirror in the upper section of the set. These are usually mounted on a horizontal black-painted board or panel above the electronics. At the top of each tube is a lens about 7" across. Through the lens you will see a red, green or blue colored face. Using a flashlight, look down into each picture tube. If you see a muddy yellow cast to the color, that confirms the problem. If you have trouble identifying the picture tubes, make sure all hands are outside the set, plug it in and turn it on. Look for the red, green and blue light sources, but be careful not to touch anything or put anything metallic inside the set while it is plugged in. (Some Samsung models allow you to remove the entire projector screen assembly - everything above the control panel - as one piece. These are relatively simple to work on for this problem.)

If you need to change the CRT coolant, check the link here. Plan on it as a full weekend (or two) project if you want to do it yourself. An experienced rear projection TV tech could do it more quickly since there would not be so much time spent looking for connectors, attachment points, etc.

Posted on Oct 27, 2010

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1 Answer

Our Samsung tv will not turn on/power on. It sounds like it starts to power on, the light blinks twice then you hear something, the light stays on solid after that. This model usually has an audible tone...


I would suggest two things you need to examine :

First remove and examine the lamp to make sure it is not shattered or fractured.

Second examine the color wheel that faces the lamp (see attached photo) and if you had a fan like sound or high pitched whine before that points to the color wheel.

The color wheel is a do it your self replacement (I can help) and takes less than a hour.


Let me know what you have tried and if the lamp or color wheel are intact.

SD TECH
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My Akai pt5499HD has no picture to it and i just replaced the flyback transformer to see if that was the problem. any suggestions?


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Aug 26, 2010 | Samsung HC-R4755W 47" HDTV

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Hi, we have a dim darkish orange screen that is pretty dark... we bought this tv from an auction (at which they stated it all worked properly, which i was skeptical but dont think that this is "working...


Over time your blue CRT in the back of your set develops a fungal growth that covers up the glass and prevents light from shining through clean this off with a cloth dampend with waterd down bleach. While you're in the back of the set clean all 3 of the tubes of with this solution. After that wipe the back of the screen off with a dry cloth. Wipe the delfection screen of as well this is the screen that is diagonal to your front screen it actually deflects light to the back of the screen you watch. These can become very dusty over time and block light. This should fix your problem. If it doesn't the fluid in your 3 cathode ray tubes is cloudy and will have to be changed by a tech.

Aug 02, 2010 | Samsung HC-R4755W 47" HDTV

1 Answer

Samsung HC-R4755W turns on and off by itself.


Have Capacitors checked in the power relay circuit, also if you have young children who like to push the buttons on the front of the set make sure none of the buttons are sticking inward or stuck in a pushed in posistion. More then likely it might be caused by a faulty System control board which we call the signal board, or bad connections on the power supply, Have a tech check the connections on the Flyback transformer and the High Voltage Deflection Area on the HV Power supply. I believe you have Cold Solder Joints in the HV Power Supply.

Hope you this helps you..

Apr 21, 2009 | Samsung HC-R4755W 47" HDTV

1 Answer

Yellow colored screen


This is a problem with the CRTs(picture tubes) or the coolant chamber(s) of same. The cost to replace the affected parts with be quite high. Expect to spend $400-600 to replace the CRT(s)

michtech

Feb 19, 2009 | Samsung HC-R4755W 47" HDTV

1 Answer

Picture problems and need service manual.


http://www.justmanuals.com/samsung-projection-receiver-hcr4755wx-parts-service-p-25530.html

$9.99

Apr 19, 2008 | Samsung HC-R4755W 47" HDTV

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Tilted Screen


Yes, there is a tilt adjust,but you should have service manual to guide you....it requires some diassembly / access in back of set.....................T.

Dec 20, 2007 | Samsung HC-R4755W 47" HDTV

1 Answer

Flickering Screen


soon the picture going to go to black screen, you got somes capacitors bothering, you better to call a tech now that he can see the problem, later will cost you more..good luck ps the picture many times tell to the tech whats going on.

Aug 07, 2006 | Samsung HC-R4755W 47" HDTV

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