I was given a JVC 60D501 Rear projection tv. This was due to the tv having what appears to be a Horizontal hold issue. The screen looks like the h hold is constantly jumping. so basically has what appears to be several of the same image in the various three color crts and the standard all in one multicolor picture all fluttering about from top to bottom with a slight vert scew as well. If this thing has a vert and h hold adjust ment I haven't been able to find it unless it is tide into the focus adjustment box located in the bottom from of the console in between two of the crt assemblies. Please help, would love to get this thing running. Or if anyone can direct me to a service manual would be great.
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it could be an electrolytic capacitor or the vertical output I.C. in the vertical circuitry,if you remove the rear cover tap on the board in different places and see if the picture fills out or atleast jitters like it might fill out,then it could be just a cold solder joint,then remove the main board and resolder all joints and this should repair the condition you have
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Sorry my friend but I had this problem. You definately have to get a repairman out to fix it. The AC voltage regulator has gone bad. Good news is it will cost about 225 bucks to fix which is ALOT better than buying a new TV.
From what you're describing your focus block is probably failing JVC p/n#129P059050. It's probably also very vibration sensitive. They're about $80.00 dollars and they are also interchangeable with the Mitsubishi focus pack p/n#920p016010. Not a difficult repair - we do about 5-6 a month. Real easy in-home repair.
Hope this helps.
There is a 5, 9 & 12 volt dc regulator on the
chassis that could be causing this. Three legged
transistors on small heat sinks. I f you look at the chassis from the rear of tv, is two boards.The one on the left has these reg. transistors. Usually the 9v regulator is bad
and a 35ufd @ 50v capacitor near it is bad.
From the tuner as ground check the third leg
on the regulator for less than 9v dc.