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

Tda9380 ps/n3/3/1664


Denotes the absence of vertical sweep. Check all the solder terminals at the vertical output IC for any loose soldering. If this IC do not get its supply voltage, or, if it is faulty, or, any connection tracks to vertical deflection yoke is open, this kind of fault can occur. In this case, as there is horizontal line on the screen, TDA1930 is working. So, troubleshooting should be concentrated to its vertical scan output stage circuits. Check for any bad capacitors too. There will be 5 to 9 electrolytic capacitors will be there, related to vertical scan circuit. Replace all of them once, not by individual. If you wish to get more details, check the site linked here. Pull up older posts.

Nov 25, 2013 | Sharp Televison & Video

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

1 Answer

My set is having a vertical related problem.When turn it on it displays a good screen and picture but a few seconds there is a folding of screen up and down that starts from the low portion of it..and that...


Hi
Please check the voltage in Vcc pin of the vertical output IC. If it is higher than apropriate voltage, replace the filter capacitor in the DC supply line of the IC. This voltage comes from one of flyback transformer windings so you should look for its rectifier diode and capacitor near the transformer. If this voltage is correct, replace the electrolitic capacitors in the vertical circuit output and some 100/220nF poliester capacitors near the linearity pin of the IC.
Sully

Sep 29, 2013 | RCA Televison & Video

1 Answer

My compressor bogs out to the point it will stall the motor and blow a fuse. it happens on the third cycle at about 110 to 125 psi


change the run capacitor on the motor,its getting weak,there may also be another capacitor for the start circuit,replace them both

Mar 05, 2011 | Ingersoll Rand SS5L5 Ir Electric...

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

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

2 Answers

Picture shows only about a 2-3" blue,green,or red vertical line down the middle


If your seeing vertical line across the screen you need to check the components in the vertical stage as well as the vertical IC could be bad, or the yoke could open.
Also check if any voltage reaching the vertical stage.

Good luck.

Was this help full.

Oct 31, 2007 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Insufficient vertical height


1 it is due to electrolytic capacitor defective in vrtical output stage. 2 loose contact in vertical. 3 fault due to feedback ckt in v/stage. as per schematic diagram is concern check www.serviceinfo.com

Sep 28, 2007 | Televison & Video

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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