Question about Sharp 27C-240 27" TV

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Location where to find the horizontal section and does eletrolytic capacitor have specific markings

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Look for the horizontal output ("flyback") transformer, which has a red lead coming from it to a connection cap at the top of the picture tube. The horizontal section is that portion of the board. (There are other horizontal circuit parts on other areas, but most of the ones prone to failure are in the area of the flyback.)

Electrolytic capacitors have three important markings: the value (in microfarads, usually abbreviated MF or uF), a voltage rating, and a polarity (some brands mark the positive lead and others the negative, but there will be a polarity shown). If you replace a capacitor, stay with the same capacitance value, but consider a slightly higher voltage rating (but never lower). The replacement will be a little larger but likely would still fit, and under-rating is what causes most failures in the first place. Be sure to get the polarity correct when installing the new part.

Be careful working on your TV. Capacitors and the picture tube can store charges that can shock you even after the set's been off for a while.

Posted on Jan 12, 2009

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1 Answer

Horizontal hold picture is rolling


Possible fault in the SYNC section and it can be due a lot of reasons.
1. the loss of feedback from the flyback transformer( EHT) cannot produce the correct sync.
2. Failure of the deflection circuit- failure of the IC.
3. Failure of related components in this section, crystals, capacitors.
4. need to use an oscilloscope to trace the horizontal/vertical pulses to locate the fault-- must have a clear idea of the circuit.
Good day

Aug 23, 2011 | Sony Televison & Video

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HI When I start my ALBA TV, there are horizontal lines across the screen with high noisy sound. I bought this TV just few months ago. thank you


The horizontal line in the screen is the problem cause by vertical output driver.The vertical output is located at the verical section.Maybe theres a loose connection in vertical section or leaked capacitor.It also the cause of deffective vertical ic.So its better to repair and trouble shoot by the authorized technician.If you have knowledge in Tv.Try to replace the leaked capacitor.

Jul 17, 2011 | Televison & Video

1 Answer

No picture just one straigth line in the middle


If this is a horizontal line then the horizontal coils is not driven , It can be a silly fault of a dry solder joint at the pin corrrection coils, in the board, or a faulty resistor( open ) or a capacitor int his section.
if the line is horizontal then the vertical scan is absent and so it is failure of the vertical drive.
Solder vertical IC and sections, can be faulty IC or capacitors in this section.

Apr 06, 2011 | Sanyo Televison & Video

2 Answers

I have about an inch to inch and half of light colored and looks to be horizontal line at the top of the screen on every channel. Haven't tried anything to fix at this point.


Hi there ! If you know technically try this :
1. try to adjust manually the trimmer at the vertical and horizontal section of your tv (located inside)
2, check for possible cold solder and try to fix it by using soldering Iron and soldering pump.
3.there maybe a change value of resistor inside the horizontal Section.
4. An open and leaky capacitor might also be the cause of Horizontal line at the top of your tv screen . thank you.

Feb 06, 2011 | Sansui 27" TV

1 Answer

Blinks 7 times


Hello
It is due to some trouble in its voltage regulator system.

High voltage shutdown. The high voltage has exceeded 33k

and the unit goes immediately into safety shutdown. Check power supply
regulation and horizontal circuits.
Open the TV, and locate the power regulator section. Usually most Sony sets uses STR regulated type power supply in this stage. If any component related to this STR got faulty, this type of fault occurs. Mostly it may be due to a loose soldering and so on. The STR will heat up, and repeated heating and colling can make tis leg soldering to get loose contacted.
You just updie down the regulated section, and look for any loose sodering or bad soldering in that section. Loose soderings are very difficult to locate, as they may be microscopic in size. So I advice you to resolder most of the soldering points on that section, by applying a little more solder. Be sure not to make any soldering bridge shorts, when resoldering. Chek it out. In most cases this will solve the problem.
If not, replace thetow or three small electrolytic capacitors there, and recheck. When replacing electrolytic capacitors, make sure of its polarity, as they have both positive and negative legs, marked both on the body of the capacitor and on the printed circuit board. Make sure not to reverse the side, otherwise it will burst out when you switch on the Tv.
Do these and see the effect. If you need furthermore assistance, feel free to get me through fixya. OK.

Dec 19, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Toshiba Model 53HX71: Bottom half of screen and sound is fine; top half of screen has collapsed to a horizontal line in the middle of the screen. Repairman I spoke to briefly said it probably won't be...


Hello
Your TV has vertcal scanning problem. All picture tube based TVs have, both vertical and horizontal scan to spread the picture to entire screen. When vertical scan section meets with a fault, the picture will collapse horizontally and fi horizontal scan section has a troubl, picture will collapse vertically. Your TV s fault , we technically say, to be vertical foldover. This is due to the vertical output section, a circuit part, inside the circuit board of your TV.
To rectify this fault you must open your TV. Unplugh it from the power socket, and open it. Locate the vertical output section, which is easy to do. Look at the deflection yoke, the coil fitted on the neck of the picture tube, and you will see four wires from it going to the main circuit board. Out of which, two will be thick, normally red and blue in colour, connected to the opposite direction on the deflection yoke, and the other two will be thin. follow the two thin wires, said later, and you will reach to a plug in point on the printed circuit board.
Before doing anything, just look at the soldering of that section carefully for any loose soldering, or bad soldering. Usually, the components in the vertical output section will get heated during working, and ahve a cahnce to get loose contacted soldering joints. Just resolder all the suspected points by applying a little more solder, and see the effect. If thi doesn't help, check the IC used in that section for trouble. Some capacitors will be there in this section, will get dried as aging, replace them first, as they are ver few in numbers, When replacing capacitors, note their polarity, as electrolytic capacitors have both positive and negative terminals like torch cells. Before replacing the vertical IC, replace all the capacitors, especially, two or three large capacitors on that section. Just do these and if you want any more assistance feel free to contact me through Fixya. OK

Dec 08, 2010 | Toshiba 27AF42 27" TV

1 Answer

I pluged up my moniter up and it didnt come on why is this.


Many monitors that do not come on or that fail to show power on by there LED in the frount have a issue with there power supply. Experts have found once the monitor was opened that BAD eletrolytic Capacitors where prsent, While these Capcitors where changed the monitor would be fuctional again.

1. check for bad eletrolytic capacitors
2. check your power cord
3. check power supply inside the monitor

Warning if you do not know how to check you might want to bring this to the attention of a local tech in your area.

Thanks for your question and please remeber to rate.

Aug 10, 2010 | Gateway FPD 1940 (Black)

1 Answer

LG 17" 700E CRT MONITOR MOSFET 2N10 IS Immediately BURN OR SHORT WHEN SWITH ON THE MONITOR..


this might be the problem of the disk capacitor of value 2kv, which is located at the horizontal section, i.e from the collector of horizontal output transistor.

Aug 04, 2010 | LG 700M 17" CRT Monitor

1 Answer

Horizontal line problem


Hi,
The capacitor in horizontal section is popped and it needs replacement. Check the horizontal section capacitors and change the faulty capacitor.
Thanks.

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1 Answer

Proscan PS27123 TV Problem


just to be sure, is it vertical or horizontal? Anyway, if it is vertical, it could point out to the vertical Ic section or some loose contacts along the lines. If it is horizontal, it could be a filter capacitor along the horizontal Circuitry. Mark the high voltage capacitors along the high voltage sections.


regards,

chris

Jul 23, 2008 | Proscan PS27123 TV

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