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My tv is 21" and the model is 21pt3324/71r the problem dead set no oscilation i can measure only 125volts from the horizontal output

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6ya6ya
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Posted on Jan 02, 2017

hardrocko
  • 1476 Answers

SOURCE: Unit power up have sound but no picture.

Check the damper diode and the protection resistor in the High Voltage circuit. Good Luck.

Posted on Jun 19, 2007

TOM2-TOM2
  • 110 Answers

SOURCE: Chirping Sound / Overloaded power supply

Check the HVG #5904

Posted on May 24, 2009

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1 Answer

Where is horizontal output ic in my t.v?


There is no horizontal oscillator IC. The horizontal oscillation is generated and outputted by the main system control IC LA76810 itself. Refer some circuit diagrams using LA76810 to get more details about the horizontal oscillation output from the IC. Measure the frequency at that output pin. It should be some ever near 15.62KHz.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in the IC number, in the search box [at the top right] of the display window, and press enter to get all related posts. It will make surf easy.

Jan 31, 2015 | Televison & Video

3 Answers

WS-65903 HD1080


press format key on mitsubishi remote control and try to get full screen.let meknow if it works if not do you have a cable or satellite box and what type?

Jul 04, 2008 | Mitsubishi WS-65869 65" Rear Projection...

1 Answer

I have a dead tv make konka model kp2905qyt


Check the frequency of oscillation at the base of horizontal output transistor. It should be around 15.6KHz. If there is no frequency, the horizontal osciallator jungle IC should be suspected.

Nov 29, 2012 | Televison & Video

1 Answer

Sony tv 21 inch horizontal output transistor failing frequently


• Power Supply B+ is higher than normal


• Partially shorted Flyback Transformer


• Bad Deflection Yoke


• Too much oscillation on the Jungle IC


• Bad capacitors around the horizontal output transistor

Sep 27, 2012 | Jwin JV-TV9090 21 inch TV

1 Answer

What's your problem?the tv won't turn on i check thehorizontal trans and its fine i check the power and everything but nothing


Check the horizontal driver transformer. Measure the frequency at the base of horizontal output transistor. It should be around 15.6 KHz. If there is no frequency measured at this point, horizontal driver transformer, horizontal driver transistor, and horizontal oscillator section should be troubleshooted.

Mar 22, 2012 | Panasonic CT-32SL14 32" TV

1 Answer

Sanyo tv model no. ST-21G1 power indicator is just blinking it does not oscillate the horizontal output. what is the possible problem or parts to be replaced?


Check if Horizontal ouput is shorted.Check if you have B+ (135VDC) power supply and secondary supplies working(12VDC, 5VDC) and check if you have horiz. drive pulse from drive transformer.
A common fault for dead set is the capacitors in the power supply (secondary of transformer) - no 12VDC supply.

Oct 22, 2009 | JVC AV-27950 27" TV

1 Answer

Dead set!


First, locate the horizontal output transistor. This is found very close to, or next to, the horizontal output transformer (also known as the flyback). The flyback should be on an aluminum heat sink, or on the side of the metal chassis. Disconnect or unsolder two of the three legs of the transistor. Measure it with your meter, or plug in the set with the light bulb attached across the fuse.
If the transistor is shorted, or the light bulb doesn’t glow bright anymore, replace the transistor and plug back in. If the light bulb glows bright again, you must replace both the flyback and horizontal output transistor simultaneously. In some cases this will fix the set, but sometimes there are multiple problems with a set.
Go to where the flyback is, and start measuring the diodes and capacitors on the flyback itself. If you don't find any shorts there, it could be a shorted vertical output IC, a shorted sound IC, a shorted disc capacitor in the Hi Voltage/sweep circuit, or in rare cases, a shorted capacitor or tuner.Feel free to ask and post whatever the result of your troubleshooting..


Hope this may help;

Regards,
VOTIT

DON'T FORGET TO RATE

Jul 30, 2008 | Televison & Video

1 Answer

Nec tv dead set


ok ur tv has no second oscillation check all oscillation circuit. check the horizontal output! check the switching transistor around at the chopper supply.

Sep 06, 2007 | Jensen TS2750J TV

1 Answer

Television wont turn on.


try to check first if theres an output voltage in the wall outlet. if there is, you have a completely inoperative (dead) set. this symptom is usually caused by a breakdown in the power supply circuit. in most modern receivers (transistorized and/or IC), it may also be caused by a breakdown in the horizontal deflection circuits (horizontal oscillator, pre-drive or drive circuits). this is because the supply voltages for the tuner, video intermidiate frequency (VIF), video amplifier, sound intermidiate frequency (SIF) and vertical output circuit are usually supplied by the horizontal output circuit. but again, if you are not inclined in this kind of job, better bring it to a qualified tv technician. good luck!

Feb 04, 2007 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

The TV just Shut off


yes we called it dead set. but this can still be fix. this symptom is usually caused by a breakdown in the power supply circuit. in most modern receivers (transistorized and/or ic), it may also be caused by a breakdown in the horizontal deflection circuits (hor. oscillator, pre-drive, or drive circuits). supply voltages for the tuner, video if,sound if, and vertical output are usually supplied by the horizontal output circuit. but if you doesnt know anything about these stuffs, better bring it to a qualified service tecnhician

Jan 19, 2007 | RCA F25216WT TV

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