Question about Mitsubishi VS-6043 60" Rear Projection Television

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Mitsubishi ck-35304 has lost Vertical Deflection. all I have is a line across screen. ic-401 is not loose...resoldered all 7 pins anyway. any help would be greatly appreciated

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I would definitly replace IC401, if you have a DVM you could check to see if you have B+ to one of the legs, I think it is 12 or 24 VDC.
Hope this helps.

Posted on Sep 20, 2009

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Check b+,dempfer diode.if its good,replace ic.

Posted on Jun 28, 2009

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1 Answer

Panasonic CT-36G34 TV vertical deflection circuit


there is a single ic you need to find, usually location ic301 or 401---it will have between 7 and 13 pins in a single straight row---a generic number is printed on the front---usually begins with a LA but can be different

Locate the chip and gain access to the bottom of the board, the pins on the chip break loose from heat==SOLDER ALL THE PINS BACK AND YOU SHOULD BE GOOD TO GO---its a very common problem in these sets.
12_19_2012_7_41_26_pm.jpgsomething like this with more pins possible--will be attached to metal of some sort to keep it cool.

Dec 19, 2012 | Panasonic CT-36G34 36" TV

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Philips/Magnavox 27TS54 C101/chassis 27B800-7562. Originally would not turn on at all. Replaced C506 (totally scorched) as other posters recommended. Now turns on but only bright white horizontal...


check for power supply for normal dc voltage..try resoldering the vertical output ic or test the vertical output ic dc supply..if there is..try finding some loose connection to the deflection circuits

Jul 13, 2011 | Philips TS2768C 27" TV

1 Answer

How do you adjust the vertical lines going across my screen?


The vertical deflection circuit of your tv has a problem.
First, try to replace the vertical ic. This ic can be found near the plyback or horizontal section. It is a linear ic with heatsink.
If nothing happens after replacing the ic, replace all the polarized capacitor near the ic and resolder the components at the vertical section.

Jan 18, 2011 | Durabrand BH1304D 13" TV

1 Answer

Advent TS2766A tv has no picture and a horizontal blue line across the screen


Hello
Only one line across the screen is due to total vertical sweep failure. In all CRT tvs have both vertical and horizontal sweeps to spread the picture to the entire screen. If vertical sweep failure occurs, you will see a horizontal line across the screen, and if horizontal sweep failure happens, you will see a vertical line in the middle of the screen or no lines or a dead tv.
In your TV, now the sound will be ok, I thinks so, and posts this solution.

You just open your tv, and locate the vertical output section in the circuit board. It is very easy to findout. Just see the four wires goes from the deflection yoke [the coil fitted at the neck of the picture tube], there will be four of them, out of which two of them will be thick, usually red and blue coloured, and another two of them will be thin. You just follow the two thin wires, which in turn goes to a plug in adaptor and to the circuit board. Just put the circuit board upside down and follow the two tracks undeneath, which will guide you to the vertical output section.
There you can see an IC screwed onto a metal heatsink. That is the vertical output IC. Just check keenly for any loose solderings on the legs of that Ic. It may happen because, this Ic will heat up when the set works. Prolonged times of heating and cooling may make loose solderings or bad solderings. It is very difficult to locate the exact loose point because some of them may have micro type loose contacts, that can't be detected with naked eye.
You just resolder all the legs of that Ic, by applying a little more solder, without shor circuiting the terminals. Chek whether you have rectified the problem or not. If not check the main supply point leg voltage. If there is no voltage follow the track and find out the fault. If there is voltage, check the voltage at the output pin of that Ic. It must be somewhat half to that of its supply voltage. If main voltage is there, and there is no voltage on the output pin, or that voltage is equal to that of supply voltage, the vertical output IC is defective. Resolder it out from the board and go for a same type and number. Replacing it will solve your problem. There is an other rare chance to get the vertical windings in the deflection yoke to open. Bu it isvery rare, out of 1/1000 of it may happen. It can be checked by continuity measuring of that coins winding ends.
You just go with confidence. Take every precautions we take before working with an electrical equipment. Proceed. You can and you will. Take care. OK.

Nov 18, 2010 | Recoton Advent Advent TS2066A TV

1 Answer

Have a 29 inch 5 or 6 yr old rca color tv lately we get a colored horizontal bar across the top of the screen and the other day we have fuzzy black lines across the entire screen


Hello,


CAUTION: To prevent damage to the CRT phosphors, immediately turn down the brightness so the line is just barely visible. If the user controls do not have enough range, you will have to locate and adjust the master brightness or screen/G2 pots.

A single horizontal line means that you have lost vertical deflection. High voltage is most likely fine since there is something on the screen.

This could be due to:

Dirty service switch contacts. There is often a small switch located inside on the main board or perhaps accessible from the back. This is used during setup to set the color background levels. (On some sets, this is located on the CRT neck board and may be a jumper plug or other means of selecting service mode - not an actual switch.)

When moved to the 'service' position, it kills vertical deflection and video to the CRT. If the switch somehow changed position or got dirty or corroded contacts, you will have this symptom. Flip the switch back and forth a couple of times. If there is some change, then replace, clean, resolder, or even bypass it as appropriate.

Bad connection to deflection yoke or other parts in vertical output circuit. Bad connections are common in TVs and monitors. Check around the pins of large components like transformers, power transistors and resistors, or connectors for hairline cracks in the solder. Reseat internal connectors. Check particularly around the connector to the deflection yoke on the CRT.

Bad vertical deflection IC or transistor. You will probably need the service manual for this and the following. However, if the vertical deflection is done with an IC, the ECG Semiconductor Master Substitution guide may have its pinout which may be enough to test it with a scope.

Other bad parts in vertical deflection circuit though there are not that many parts that would kill the deflection entirely.

Loss of power to vertical deflection circuits. Check for blown fusable resistors/fuses and bad connections.

Loss of vertical oscillator or vertical drive signals.

The most likely possibilities are in the deflection output stage or bad connections to the yoke.

May 30, 2010 | Televison & Video

1 Answer

Good sound no picture just line thru middle of screen


If the line is going across the screen from side to side that means you have lost vertical deflection, and you don't want to run the set like that because you can burn that line into the picture tube. Most likely would be the vertical output ic, probably with a 400 location number, example IC401, could also be a capacitor in the vertical circuit most are close to that IC.

Aug 28, 2009 | Mitsubishi Televison & Video

2 Answers

TV shows only a thin horizontal light whenever i turn it on


there seems to be a problem with the vertical deflection ic or deflection yoke . try resoldering the vertical ic joints look for other loose solder joints around the vertical area on the circuitboard

Nov 17, 2008 | Televison & Video

1 Answer

Single Horizontal line


The vertical IC has failed. Open up the back and look for a small flat IC attached to a heatsink. It should have about 11 pins or so and be marled LA3847 or something similar. First try resoldering the pins as it is common for the connections here to go bad. If that fails to resolve the problem, replace the IC.

Keep us posted.
Dan

Aug 18, 2008 | Mitsubishi CS-36609 36" TV

1 Answer

No picture


Sound like you lost Vertical Deflection.  Youshould not have a line across the screen because this could destroy the threeCRT Red, Green, and Blue (Picture tubes) if left on to long. There is a protection circuit built in to protect your CRT’s.    Check on the PCB-SIGNALboard (Tuner located on this board) transistors Q-206 Collector should be around 1 Volt Base and Emitter 0V. If the voltage atthis point is greater then 5 Volts the Vertical output IC-401 (Mounted on heat sink 7 pin inline IC) is bad, Part # LA7845.  Pin Voltages should be PIN 1= 0V, 2= 34V, 3= 32V, 4= 3V, 5= 3V, 6= 33v, 7= -6V.  Data sheet located at http://pdf1.alldatasheet.com/datasheet-pdf/view/40357/SANYO/LA7845.html

Jun 22, 2008 | Mitsubishi VS-6043 60" Rear Projection...

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