Question about Mitsubishi VS-45605 50" Rear Projection Television
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!
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
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.
Posted on Sep 23, 2008
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Posted on Jan 02, 2017
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