Tip & How-To about Sony KV-35S42 35" TV

Intermittnet picture, sometimes part of the verticl

Cols solder connection on the vertical output IC.

Be careful - when you pull the chassis it pulls the plug that connects to to front logic and it takes careful eyes and a flashlight to put it back in.

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I have an old mitsubishi TV model cs 35203 serial 515512, and all that shows up on the screen is a thin horizontal line through the middle.


You either have a cold solder connection on the vertical output IC401 or a failure of the Vertical output IC altogether. The part number should be labeled clearly on the front of the chip and is likely LA7836 or LA7837. It's difficult to reference parts on a set this old. Remove the chassis and visibly inspect the solder connections. If they look good, replace the chip. Good luck

Bill W
integrityhomeworx.com

Mar 12, 2011 | Mitsubishi VS-5043 50" Rear Projection...

1 Answer

TV turns on and a white line is horizontal, and i can hear sound.


Hello
There is total vertical swee failure occured on your TV. All CRT based telivisions have both vertical and horizontal sweep to display picture on the screen. In your TV, vertcal sweep has gone out; and horizontal sweep is there, that is why you see a bright horizontal line on the screen.
There are mainly two reasons for this fault. One is bad soldering at the legs of the vertical output Ic, and the other is Vertical Output Ic failure.
You just open your tv, and locate the vertical output Ic. It can be located by following the wires that goes from the deflection Yoke of the picture tube to main board. This will contain four wires, out of which two of them will be thick, usuall red and blue, and the other two will be thin relative to the above said pair, may be green and black, or green and yellow. You just follow the two thin wires, as they are carrying vertical sweep signal to the deflection yoke.
Normally these four wires are socket pin type arrangements, which has pluged into the printed circuit board, and can be detached by pulling its plug from the board. Just make the board upside down and carefully look for any loose contacted solder joints of any other to the solderings of this plug. If it is found ok, then follow the print to where it goes to. it will lead you to vertical output Ic said above. It will be screwed onto a metal plate, to radiate heat out of it when it works. Just look for any loose solderings there on the legs of the Ic. It is quite normal that these solderings will get loose with time, as these ponts are heated and cooled several times.
Resolder all these legs with applying a little more solder, without any short between these legs. Switch on the TV all connections have given. Normally this will retify your problem. If not, IC stated above is faulty. Resolder it out from the board and go for a same type and number. Replacing it will rectify your complaint. OK.

Nov 12, 2010 | Emerson EWF2704 TV

1 Answer

50" rear projection TV


This is a VZ3 chassis1.gif....notorious for cracked solder connections on the yoke plugs. Look at each yoke on the 3 CRT necks , you'll see a Molex plug on each yoke. The top two connections are for the vertical winding. There is a plastic tab that hinders easy soldering of these....carefully clip it off with a good pair of ****. You can then access the top 2 solder connections. Resolder these and also resolder the vertical output IC401. This should take care of the problem.

Dec 19, 2007 | Mitsubishi VS-5043 50" Rear Projection...

1 Answer

When I am trying to turn on the tv by remote or pushing the power buttton it goes to stand by mode


Solder bad connections vertical output IC......requires chassis
to be pulled....................T.

Dec 05, 2007 | Sony KV-32S26 32" TV

1 Answer

Mitsubishi VS-5062


This is a VZ3 chassis1.gif....notorious for cracked solder connections on the yoke plugs. Look at each yoke on the 3 CRT necks , you'll see a Molex plug on each yoke. The top two connections are for the vertical winding. There is a plastic tab that hinders easy soldering of these....carefully clip it off with a good pair of ****. You can then access the top 2 solder connections. Resolder these and also resolder the vertical output IC401. This should take care of the problem.

Nov 19, 2007 | Mitsubishi VS-5043 50" Rear Projection...

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