20 Most Recent Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television - Page 7 Questions & Answers


Samsung... | Answered on May 15, 2009


Samsung... | Answered on May 15, 2009


Samsung... | Answered on May 15, 2009


Samsung... | Answered on May 15, 2009

The repair of this unit will be determined by the status of the high voltage on initial power up. You need to do a few tests in order to narrow down what the high voltage is doing. You will need someone to assist you.

Unplug the AC cord. Remove the rear lower cover from the tv. Make sure the room is quiet. Put your ear inside the tv being careful not to touch anything metal, although most metal objects are ground. Next, have someone insert the cord into the AC outlet while listening very carefully. What you are supposed to hear is a click which is a relay and high voltage snap up. If you do not hear a swishing sound, which is the sound of high voltage have someone press the power button on the front while you are still listening. If you hear the swishing high voltage sound come on, it will come on and stay on, or collapse. Repeat the test, unplug the cord and plug in the cord to confirm the high voltage is coming on and staying on or coming on and going into collapse.

If the high voltage does not come up at all it means that there is a basic high voltage power supply problem and an experienced technician needs to guide you through a high level repair which is above the scope of this discussion. You may want to contact a skilled technician.

If the high voltage comes up and collapses right away, which is the most common fault, it means that the unit is entering the protection mode. The protection mode is most commonly caused by convergence or vertical sweep system on that model and big screens in general. These repairs can possibly be done by consumers with basic electronics knowledge. If you want to repond with test results we can supply more information on repairing the convergence or the vertical sweep system.

If the high voltage stays up then the likely fault is a power supply problem is muting both the video and the audio causing the unit to go into protect. Consult a service manual, track power flow though out the unit to determine which circuit is impaired.

Samsung... | Answered on Apr 27, 2009

Replace the Power deflection board that should solve your problem. You can get a replacement board for your model at the following link.

Samsung... | Answered on Apr 27, 2009

Sounds like you Horizontal Ic is/has gone out from the description.

Samsung... | Answered on Apr 19, 2009

Resistors most likey...look for burnt or discolored resistors near the convergence chips.

Samsung... | Answered on Apr 13, 2009

There are usually two one contains three amplifiers so there are two for the Red two for the Green and two for the Blue.

Samsung... | Answered on Apr 06, 2009

check the 3.9 ohm resistors as well as some of them may be open also

Samsung... | Answered on Mar 29, 2009

Sounds like you soldered two of the convergence pins together by accident. If its shorted the TV will shut down.

Samsung... | Answered on Mar 29, 2009

When you change the convergence board you must do a complete factory alignment. If you have never done this, do not attempt it, call a svc. co. You won,t regret it. Just curious, why didn't you repair the original?

Samsung... | Answered on Mar 28, 2009

Its a fairly straight forward repair. i would recomend getting your replacement Ics at the following link, as they provide free instaltion instructions with pictures, free shipping and free online instant messageing when you do the repair in case you need assistance. Heres the link.

Samsung... | Answered on Mar 28, 2009

Plugs on the chassis coming from keyboard and side video input are switched (they have same plug)
redoo convergence save and auto focus in factory mode after switching plugs

Samsung... | Answered on Mar 05, 2009

check for bad color wheel....may sould like a grinding sound

Samsung... | Answered on Mar 02, 2009

it might be set on sleep mode check again


Samsung... | Answered on Feb 24, 2009

the yellow illumination wire not connected properly and brown ground wire needs new location

Samsung... | Answered on Feb 15, 2009

You can get the service manual from the link below

Click this link

Try this in your remote 7 8 9 to select R G B, 4 to select moving part a line, full line or the whole matrix.
S.mode to save your setting.
Adjusting using arrow keys.

Samsung... | Answered on Jan 24, 2009

go to www.ebay.co.uk they should have some on there


Samsung... | Answered on Jan 18, 2009

With power on, press Mute-1-8-3. That will get you into convergence mode. 1 sets factory default convergence. Avoid pressing 2 - it resets everything. 3 restores the last saved settings, 4 switches among fine adjust, line adjust and grid move. 7,8,9 - select R,G,B. The three keys below those turn RBG on/off.

Self-focus to save the settings. S-Mode to exit.

It can be a REAL headache, but take your time, and you'll get it done.

As an after thought....if you have a need to manually adjust the convergence, you probably have something wrong - unless you've just replaced parts and are doing the initial convergence.

Samsung... | Answered on Jan 12, 2009

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