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Tv cuts off 10 seconds after switch on and destroying vertical output ic

This Sharp TV literally eats vertical deflection ics. I investigated with an oscilloscope and found that pin 22 of the main ic, X2933ce, has no output drive waveform going into the vertical deflection chip. There is not even a dc voltage on this pin which appears to be open. Unfortunately, this ic is prohibitively expensive. I tried to cross reference it with another similar looking ic on another board, X2701ce, but neither ic is listed in the NTE catalog.Has anyone had a similar problem, and is there an inexpensive solution that I may have overlooked?

Posted by Anonymous on

  • Anonymous Jul 06, 2007

    The vertical o/p is a TA8427k, and what I mean by eating the ic is the part becomes shorted between pins 1 and 2 as soon as power is applied after replacement. The pump up diode D501 and capacitor C508 were checked, along with the vertical deflection coils, and the large electrolytic capacitor in the yoke return. The 1 ohm current sensing resistor in the vertical NF network was also ok.
    Is it possible that without vertical drive and with the input of the ic going to ground through the 4.7k resistor on pin 22 of the X2933ce the bias conditions on the vertical output ic cause an excessive current to flow through the lower half of the totem pole output stage, destroying this transistor?
    Is there any cross reference or technical data for the X2933ce and other recent Sharp ics? Thank you in advance for any assistance rendered.



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If the main IC is not putting out a vertical drive signal then the vertical output will not do anything and therefore will not be damaged. What exactly do you mean by the set "literally eats deflection IC's"? What is the number on the vertical output IC? I will bet that your pump-up cap or pump-up diode is defective.

Posted on Jul 05, 2007

  • Anonymous Jul 10, 2007

    Pin 1 is ground and 2 is output. If pin 1 is actually grounded then there must be a coupling cap in series with the yoke, and this would prevent the IC from shorting if the input to the IC is such that the output rails to B+. In this case, no matter what the input is, the output is protected and the IC will not be damaged. With the IC unsoldered and removed, measure for a short from the pad of pin 2 to ground. If that line is shorted then the output will destroy itself the second the set is turned on. I cannot think of any other case where the output would be immediately destroyed. If the pump-up diode was open then you would have no output, and if the pump-up cap was open then the IC would work for a while (with heavy white lines at the top of the picture) and then short out. I do not have any information on the X2933ce, other than the fact that the whole part number is RHIX2933CEZZ (I think).




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Good to you, sis, i have a problem with my sharp tv. tv cuts off 10 seconds after switch on and destroying vertical output ic and i chang the ta8403k an the line is there still?

Posted on Sep 23, 2011


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Info on the reason the tv does not turn on with the main power button or the remont control unit. after many attempts the tv starts to turnon shows a green picture with horizontal lines and is cut off...

Your vetical ouput deflection is gone that's why it will not power up. This is commonly caused of shorted vertical output IC. This is not DIY because the FF is still to be consider :
1. Fusible resistor in line with the supply of vertical output IC.
2. Yoke winding might be open.
3. No vertical output from the jungle IC.
I've advice you to send it to the nearest Sony service center in your area.
Hope it may help you.
Have a nice day.

Unit has sound, no vertical deflection. caps and output ic ok. have b+ to output. nothing at pin 2 of output ic.

If there's an audio,,it might be the defective Vertical IC...but check first if there's 24v-26vdc supply coming from FBT going to Vcc of Vertical IC.

If there's no Audio,and only white horizontal line in the screen,check the Vertical out of Jungle IC.

Good luck!

I have a three year old model pvc2542 tv/vcr combo the picture is just a line in the center of the screen

Bad vertical deflection circuit, unless you have a bad connection (bang on set to set it it fills out for a second) . you will need components replaced such as the IC, capacitors possibly a fuse from the power source to the vertical IC.
If its a bad connection soldering the IC pins is not to hard if you are OK with taking it apart yourself.
gd lk

I’m happy to help further over the phone at


Vertical line in center have replaced vertical output ic

If the line is vertical then the problem is no horizontal deflection. The vertical chip is probably fine.

Check connections around yoke (thats the connector with at least four wires that goes up to the coils around the neck of the tube)

Maybe that TV has two horizontal output transistors. One for deflection and one for high voltage? Check both of them. Look for bad solder joints!!!

Sony Trinitron Colour TV Stopped showing and switch light flicker

The vertical output IC has failed/Power to the vertical IC is out/ or there is bad solder on the pins of the vertical output IC.

Emerson EWF2702 TV Problem

Hello yyimerr1,

This is a vertical deflection problem, These are the possible causes:

1) bad vertical coupling capacitor
2) bad vertical output IC
3) bad vertical driver IC
4) bad CRT deflection yoke

Troubleshooting needed:
1) using the TVs schematic locate the driver IC the output IC and the CRT yoke transformer.
2) using an oscilloscope look at the vertical driver signal it should be a sawtooth signal from the driver to the yoke (increasing in amplitude for each section, i. e. driver and output).
3) if no sawtooth patter is seen that is your problem, look for the component in the section where signal is entering but nothing is coming out.
4) replace the components

Now let me tell you something, don't continue to play the TV with the line present with brightness applied, this will burn the image of the line into the phosphorous coating of the CRT.

I hope this helps

Thank you,


TV shutdown for roughly 10 - 15 minutes after being on for hours

Yes the vertical circuit will shutdown the set if theres a problem with the deflection circuit. This model has a history of leaking CRT coolant on the boards near the vertical IC destroying the solder and actually eating through the circuit board. Check the area near the Vertical output IC for signs of coolant leakage or solder cracks.

Sharp 25" tv unknown model (no av in)

It is a simple trouble, tv has got dry solder joints in the vertical deflection circuit. Resolder vertical output ic pins and related components, this will be okay.

Toshiba TV

vertical deflection problem. Vertical output IC, pump up cap, power to output problem, bad connections, jungle IC. Its a good idea to replace all electrolytic caps near the output IC. Bad caps cause it to run hot and self destruct.

Missing vertical deflection on philips TV

TDA 8362B IC which have vertical freq.output is at pin no.43. (vert.osc) caution for fixing this problem minimise brightness to avoid crt burn. proceed as follows 1 if you are getting sawtooth at output of ic tda 8362 pin 43 then check 1 supply at vertical output ic from eht. 2 yoke connector loose . 3 check vertical output ic parts. 4 finally vertical ic. please check for normal output from power supply even though fault gets rectified just for protection. good luck.
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