Question about TruTech PM1919BXA1 19 in. LCD TV

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Bad vertical output IC - Only a horizontal line on CRT

Trutech T2000-D, vertical output IC burnt to the point that no markings or part number are legible. Unable to locate schematic or service info on-line. Any suggestions?

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Posted on Dec 31, 2008

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How to solve horizontal lines on a CRT TV monitor and what could be the possible courses for it


Monitor horizontal lines problems usually caused by a defective vertical output/driver ic. A missing supply voltage to the vertical output ic may caused similar faults which is one horizontal line across the display. Dry joints and missing vertical output pulse from vertical oscillator ic also could contribute the same symptom. If you discovered that the protection resistor (usually from 1 to 4.7 ohm) open circuit or burnt, then replacing it won't solve the problem. The resistor burnt or open circuit was due to a short in the vertical output ic. Thus you have to replace the vertical output ic and the burnt resistor together before you switch on the monitor.

Jun 12, 2015 | Televison & Video

1 Answer

Where is horizontal scan out put section?


Hi Majid
Just contact any service technician to repair your TV. It will be best for you.
Gopakumar Gopalan Google

Feb 01, 2015 | Televison & Video

6 Answers

Circuit diagram TC-29P20B


A single horizontal line indicates "No Vertical Sweep". It is most often caused by a loose solder joint on the vertical output device, (transistor, or packaged circuit).

Apr 29, 2014 | Panasonic TC-29P22R 29" TV

1 Answer

Tv has horizontal line in middle of screen,sanyo ds25390


hi if only a horizontal line across with no video anymore, you have bad either vertical ic or no dc supply b+( vertical ic ) or no output dc coming from the ic. if it is not totally a horizontal white line and you can see a video you must check leak or bulged capacitors at the vertical section near the vertical ic. hope this can help good luck.

Oct 02, 2012 | Televison & Video

1 Answer

What electronic parts is bad when the tv has horizontal problem?


Check all the electrolytic capacitors and solering points of the Vertical Output IC. The problem is with its vertical output stage. Replace all the electrolytic capacitors [5 or 6 of them] at the same time. Resolder the solder terminals of the vertical output IC, by applying a little more solder, without making any solder bridge short in between adjecent solder terminals.

Mar 21, 2012 | Televison & Video

1 Answer

Tedelex horizontal line plus no sound


No, you may have 2 different problems. I would repair the vertical first. Check for 24v on your vertical output ic, maybe bad vertical output ic. If it is shorted, may draw down your vcc for your audio circuit. Check vertical circuit for open resistors or bad vertical output ic.

Nov 25, 2011 | Televison & Video

1 Answer

Television has sound can change channels....but has no picture just a thin horizontal line in middle of screen


Hello
The vertical sweep section of your TV is faulty. It may be either to a loose solder points at somewhere in that section of to the fault with the vertical output IC. Check all the solder points on the vertical output section of your TV. It is best to resolder most of the suspected soldering points, by applying a little more solder, without making any solder bridge short in between adjecent solder terminals. If this does not help you, replace the vertical output IC with same type and number. OK.

Oct 21, 2011 | RCA 27V530T 27" TV

1 Answer

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!!!

May 21, 2009 | Sanyo DS31520 31" TV

1 Answer

Green horizontal line in center of screen.


Bad vertical output ic. Also, check resistors and diodes around vertical output ic.

Mar 23, 2009 | Sony KP-46V35 TV

1 Answer

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,

Shuttle83

Nov 01, 2008 | Emerson EWF2704 TV

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