Question about JVC AV-27530 27" TV

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Re: Hi Pravin,thanks for the reply.where abouts in the circuit would i find the capacitors in the Vertical stages.And I have read before opening up a tv casing is a bit dangerous due to high voltage. is it really that dangerous even if i haven't connected the power or to get to the circuit board would i have to risk any danger?please..i really want to do this just need some help where exactly to find the capacitors on the circuit board.

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Hi there. we owned the same model. we were told by a professional tv repair person to just throw it out. it will cost more to repair than the price we originally paid for it. so we did. junk.

Posted on Jun 27, 2007

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If you have no power my friend, the problem is not capacitors in the vertical circuit. Your problem is is the main power supply or possibly in the sweep power supply. You will need to first get a service manual for this set and know how to read it. I wish it was that easy as to look and tell you to replace this and to replace that. Yes, some sets do have problems that are common, but this is not the case most of the time. There is voltage inside this set even when it is unplugged, so if you have no TV repair experience, my best advice would be for you to call in a pro to assist you in this repair. Good Luck

Posted on Jun 20, 2007

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1 Answer

24af45 from top to bottom picture is wavy until set warms up


Check and replace all the electrolytic capacitors at its vertical scan output stage circuit. Replace all of the once.

Apr 04, 2013 | Toshiba 24AF45 24" TV

7 Answers

I have a 2 year old Toshiba FSTPURE 27" flat tube CRT tv. The problem is that there is no vertical scan---the picture is a single horizontal line in the center of the screen and all other systems...


Hi,

Often culprit would be the vertical IC. The are a fe instances that it could just be a resistor that has opened or increased its resistance.

Basic tools (DVM, soldering iron hand tools) should be enough. Perhaps you would not even need a service manual but a schematic would help.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.


Jun 30, 2008 | Toshiba Televison & Video

2 Answers

I have a 6 year old 32" Toshiba tube .tv. I have


thir is somecondensers on the tv needs to be changed especialy on pwer supply and vertical circuit it is easy fault but needs technication,,,but first be sure thir is no floresent lamp common with the same supply of the set






Dec 23, 2010 | Toshiba 32A14 TV

3 Answers

Tv has horizontal lines on top of screen.


Hello
You are seeing vertical retrace lines on the top of your TV screen.
There are mainly three causes for it. I don't know the age of your TV. The first cause is due to the supply voltage lack to the video output state. You can check it on the picture tube base card. You haven't mentioned about the diamension of your TV screen. So it can be say as a guess. If your TV is 27", the voltage mantioned above will come to about 245VDC. If there is a great voltage loss, check the smoothing capacitor to that supply, will normally come to the value of 10MFD 450V.
The second one is, capacitor related to the vertical output stage of your tv. It is in the circuit board. Normally these capacitors are situated in an area, which will get hot during working. As s result, there is a chance to the value change of their capacitance. It is best to replace all of them, as it may not cost too much. Before desoldering it out, mark the value of each capacitor is best. Normally replacing the filter capacitor 3300MFD or so,to the power supply to the vertical output Ic will solve this problem.
The third is related with the vertical output Ic itself. Just check all the soldering points in the vertical output section of your tv board. Anyway, resoder all suspected soderings by applying a little more solder, as bad solderings to the legs of the Ic or some other components also may the cause. OK.

Nov 10, 2010 | Toshiba Televison & Video

2 Answers

No vertical deflection -Horizontal line on tv


check or re solder the ic of vert. defl.

Jun 09, 2009 | Sansui 27" TV

1 Answer

How do you fix a white horizontal line across top of Orion TV?


Hello eatkinson,

This denotes a problem with the vertical deflection circuit. This is more then likely the result of the vertical coupling capacitor failing. You will need the schematic diagram of the TV to find the capacitor in question. it is located between the vertical output stage and the vertical deflection winding of the yoke transformer. In addition check the continuity of the vertical winding of the yoke transformer this can cause the same problem. In any event the problem is that the vertical deflection signal is not getting to the yoke transformer or the yoke transformer is malfunctioning.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Apr 08, 2009 | Orion1934 19" TV

1 Answer

35 inch Mitsibutchi TV model #CS-35201A, serial #502637, manufactured 1993 TV made a popping sound when turned on and now only visable object is a straight horizontal colored line in middle of screen....


Hello dan82810,

The picture tube or CRT is not the problem, and yes this set is fixable. What has happened is that the vertical deflection circuit has malfunctioned. More precisely the vertical coupling capacitor has malfunctioned (The pooping sound was the capacitor exploding).

Open up your TV (take the back off and unplug the set), and look for the damaged capacitor, it will look puffy or if it has exploded.

To fix this problem you will need the schematic diagram for the TV (can be found at www.servicemanuals.net). Then you will need a multimeter to measure the DC voltages on the vertical output circuit, and finally an oscilloscope to measure the waveforms at the vertical output circuit and the input to the vertical windings of the deflection yoke transformer.

Now what you should basically find is a sawtooth wave at 60Hz which is the drive for the yoke transformer. However since the coupling capacitor is bad you will have the wave at the output of the vertical output stage, but not at the input of the yoke transformer. Use the schematic to find the value of the capacitor that has malfunctioned.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Feb 28, 2009 | Televison & Video

1 Answer

Vertical height shortened on 9-1074 module.


Hi

Can you give me the exact problem? im waiting for your reply...

Thanks!

Oct 23, 2008 | Zenith C27A24T 27" TV

1 Answer

Horizontal white lines at top of screen.


This problem is generally due to aged Electrolytic capacitors in the Vertical section. Again, to save time, I invariably replace all the 8-10 El caps in this stage at one go. solves the problem, saves time, and also protects the customer from bringing in the machine again in another 2-3 months, for another bad capacitor problem.

May 25, 2007 | Panasonic CT-27D20 27" TV

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