Question about Samsung HP-R4252 42 in. Plasma HDTV

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R4252 No picture, sound OK Y-Drive buffers overheating

2yr old Samsung (electrograph) R4252, No picture, sound OK. All PS voltages good to the X-drive and Y-drive boards. After about 5min the X-buffer IC's get hot and start popping/burning.

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  • Centre de reparation Brochu electro

    I have the same problem: the sound is OK, but, no picture and it smells burn. Before that, I had horizontal lines on the top of the screen. I dissassemble the t.v. and I have the service manual to repair it. I am an electronic technician, but I only learned to repair CRT tv's, unfortunately.

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Try to replace the Logic Board, about 50% chance to fix the problem.

Posted on Jan 04, 2008

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1 Answer

Short circuit on the "Y" sustain board


The problem is heat!!! If the tv has fans they should be checked for normal operation,although on the early samsung models there were none, and the problem is that the panel drive buffers are getting to hot due to inadequate cooling. This is most apperent when tv is mounted to close to the wall, also external fan blowing on the rear left side will dissapate the heat. It is a problem on early Samsung and Electrograph 42 " plasma models. Hope this helps.

Jul 28, 2010 | Samsung Televison & Video

4 Answers

HPT5054 50 in. HDTV-Ready Plasma Television: Samsung HPT5054X/XAA - No picture, Sound OK, Have ...


It's not the x main. 90% of the time it's a y buffer that goes out. It's usually the top buffer. 3/4 of the time the buffer takes out the y main board too. You cannot just replace the y-main or buffer because it will just burn out the other within seconds. Also about 1/4 of the time it'll take out the top transformer on the power supply too. The solution? First disconnect the power to the y main board. turn on the television and check the voltages coming off of it. Careful it's high voltage 208V! Remember it's DC too. Then disconnect the buffers from the y main board. You can try powering the y-main up to see if the little LED lights up. This does not indicate it's working though but it'll tell you if it is possible to fix. The fixes for these boards is only for electronics guys. It usually involves replacing 1-3 capacitors and 1-4 FET's. Since a bad buffer can take out a good y main in seconds it's usually recommended that one replace all 3 boards at the same time. It's a $250 fix. How do I know all this? I've now repaired 5 of these televisions. I owned one and spent close to 600 repairing it. I bought misc parts and broken sets online for months before I had 2 different repair guys walk me through the process of repairing them. I had so much cash tied up in parts that I bought 3 more dead sets and repaired them to justify all my spending. I've never had an x board fail. I've had EVERY top buffer fail. I've had all but 1 y-mains fail. and 1 lower buffer fail. I've also had the y buffer fry it's top chip, blow a capacitor and FET on the y-main, and fry the top transformer on the power supply before my eyes. It only took 5 seconds. Replacement of the 3 y boards will almost always fix the sound but no picture problem. Hope this helps!

May 16, 2010 | Samsung HPT5054 50 in. HD-Ready Plasma...

1 Answer

I have a samsung HP-R4252 42" Plasma which is over 3 years old and 3/4 of the picture is covered in lines and the color is predominately red, any help?


REPLACED Y BUFFER BOARD
Samsung BN96-02034A BOARD, Y BUFFER UPPER ASSY
Samsung BN96-02216A BOARD, Y LOWER BUFFER ASSY LJ92-01203A

Nov 02, 2009 | Samsung HP-R4252 42 in. Plasma HDTV

1 Answer

Samsung HP-T5054 NO pic No sound B


samsung boards are around $200 EACH , usually a bad buffer burns out the Y board , buit yours sounds like a burn power suppy, do a visual of the PS, if looks ok ck for the VA and VS voltages (there is a tag with the values on it) . if the VA or VS is low or missing you will probably need the Y and both Y buffers.

Jul 24, 2009 | Samsung SPN4235 42 in. Plasma HDTV

1 Answer

Samsung HP-R4252 Burn Y-Buffer UP


no.....................................

Aug 08, 2008 | Samsung SPN4235 42 in. Plasma HDTV

1 Answer

Electrograph DTS4225PTD Plasma TV 42"


It's Y upper buffer, also cross matches, with LJ41-02760A which is for Samsung 42 Plasma

Feb 29, 2008 | Electrograph Systems DTS4225PTD 42 in....

7 Answers

Samsung HPR4252 with red horizontal lines accross the screen


I just had my HP-R4252 repaired on 12.05.09 with a similar problem. The picture is covered in horizonal, broken lines and the color is predominately red. They lines are grouped together in large bands across the screen.

The tech replaced the Y-Buffer boards (Up) and (Low) in about 20 minutes.

Samsung BN96-02034A BOARD, Y BUFFER UPPER ASSY
Samsung BN96-02216A BOARD, Y LOWER BUFFER ASSY

Feb 05, 2008 | Samsung HP-R4252 42 in. Plasma HDTV

1 Answer

PLASMA Y-DRIVE


Most times with this happens you can repair it by replacing the buffer bds. Sometime the ysus bd is bad and unfortunately the panel can cause this problem. I would say 60% of the time the buffers will correct the problem. I usually replace both at the same time.

Jan 04, 2008 | Samsung HLN617W 61" Rear Projection HDTV

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