Question about Mitsubishi VS-45605 50" Rear Projection Television

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Mitsubishi vs-45605 with wavy lines

I have a Mitsubishi vs-45605 and when turned on the screen begins to roll vertically. In the past the set used to do this for about 30 mins when turned on and now has this "o so neat" effect permanently. I have read that the set could have a problem with the PIP module but after further research and wasting money i came to find out that this set is part of the VZ7 series and that this set does not have a PIP module. So im back to square one with a little more info. I have the service manual and know enough to get the job done myself, just need to figure out what to do. Any help would be greatly appriciated. thanks!

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  • jmwoodward1 Sep 23, 2008

    sorry for the stupid question but are you talking about the wall that the tv is against? Because it is currently in the middle of my room..... best light.

  • jmwoodward1 Sep 25, 2008

    so are the filters replaceable?

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If you have a scope hang it on the tuner video output. If it looks like mine it's the black noise clipper in the Video IF chip removing the sync by mistake, probably a part changed value somewhere. I have the same thing in my VS-5002, works fine on EXT inputs but no sync from tuner, video and chroma OK, just nearly no sync. I have a post here looking for an answer short of changing the IF amplifier chip.

Posted on Feb 18, 2015

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The first things to check are the filter caps in the main power supply area. Usually this rolling is caused by 60 cycle hum coming from the wall. Try that first and update this with your results. Also, while you are in there, resolder any joints that appear grainy or have rings.

Dan

Posted on Sep 23, 2008

  • ABRsvcs Sep 23, 2008

    The power from the wall is AC 110 V. AC stands for alternating current which varies plus and minus by a total of 110Volts and cycles at 60 cycles per second. This is noise that is usually filtered out of the power suplpy as it converts AC current to DC (Direct Current). If the filters are defective, there will be interference in the later portions of the set that can show up as you describe.



    Dan

  • ABRsvcs Sep 25, 2008

    Yep. Look for capacitors with large values in the 4700ufd range in the power supply and check those.

    Dan

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