Question about Samsung HCL4715W 47" Rear Projection Television

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SAMSUNG VERTICAL PROBLEM , BUT CHIPS ARE GOOD

REPLACED 392-040 CHIPS BUT STILL HAVE PROBLEM.

I HAVE 3 SQUIGGLEY HORIZONTAL LINES ACROSS THE SCREEN.

ALSO REPLACED VERT. IC LA 7845

CAN'T GET ANY VOLTAGE ACROSS THE VERTICAL YOKE WITH IT PLUGGED IN OR OUT.

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  • Samsung Master
  • 8,617 Answers

You have some open resistors in the convergence circuits.

Posted on May 13, 2008

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Dark horizontal line traveling across the screen vertically


on tube tvs bestto go on main bord look for hairline craks on soldering ok redo them nice it will light up happend to mine also older model thx nick

Feb 06, 2008 | Sony FD Trinitron KD-34XBR960 34" TV

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On power up I hold the power button down, I can hear some sort of relay kick-on, sometimes a horizontal white line appears across the screen, then it kicks-off, and the red led blinks four times...


Hi,
White line across the screen indicates that tv got vertical deflection failure problem that may be due to vertical output chip failure. If that kind of problem occurred, tv select protection mode and red light starts blinking 4 times.
Please check vertical output chip in tv main board and replace it to solve tv issue. This job needs soldering work so local tv repair shop will help you.
Thanks.

Feb 01, 2011 | Sony FD Trinitron WEGA KV-24FS120 24" TV

2 Answers

Black screen with horizontal line across


Looks to me like a horizontal inter grated circuit would be the blame on why this is happening.

If it where the fly back transformer you would not have nothing (most cases)

What I suggest is to have a shop look at it for you and give you a estimate if it comes over $90 bucks then its not worth the repair/replacment. These tv's can be bought with digital tuners for $120.00 so I would not lay more then $90 at the most in this unit.

Thanks and please do be considerate when passing threw fixya.com to leave positive ratings and feed backs for all experts involved helping you in your situation. Thank You

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1 Answer

Picture on RCA TV shrinks to a horizontal line


Hello,
Sounds to me you have a cold solder joint ( loose solder connection ) on the printer circuit board around or on the vertical chip or on one of the vertical capacitors. You may also have a bad vertical chip or a bad vertical capacitor, but I doubt it since it did come and go. I'de get a soldering iron and some solder and touch up the connections. I will remind you that you need to always excersise saftey by making sure, before removing the back, unplug the TV from the wall, and use care not to come in contact with the large red wire going to the back of the picture tube as the picture tube can be turned off and still store lots of voltage ( up to 35,000 volts). Always stay safe and when soldering, use care not to run solder across places that will make a short.
Good Luck and I hope this helps
Ed Meshechek ( Radio Man )
NC Electronics
Mills, Wyoming
307-266-4675

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STK392-560 STKS convergence CHIPs Replace both of them.

Feb 24, 2008 | Hitachi 51GWX20B 51" Rear Projection...

1 Answer

Jvc av-29ts2ek


It sounds like a vertical deflection problem. You mentioned you had a white HORIZONTAL LINE in the middle of the screen. If this line runs from left to right across the screen it's in Verticla deflection. If it runs from top to bottom, it's in Horizontal deflection. I am assuming the problem is a Vertical deflaecion problem. The repairs necessary are most likley to replace the vertical capacitors or the verticla deflection chip.
Good Luck
Ed
NC Electronic Mills, Wyo USA

Jan 05, 2008 | JVC TM-2703SU 27" TV

1 Answer

Sanyo DS31590 31" TV vertical deflection


If the vertical is not defective or shorted there is a possiblity of bad solder connections on the vertical ic. If connections are good and has b+ voltage to the chip replace chip which is IC 501 LA7841 or LA7845 and change c511 (decimal point 1 film capacitor)

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1 Answer

Samsung 42" HCM4216W Dim Horizontal line across screen


THIS HAS NOTHING TO DO WITH CONVERGENCE or any of the stk integrated circuits.There are few capacitors close to the vertical output ic, they are usually blue or red (could be 1000uf 50volts for e.g.)That where the problem is

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