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Equipment Repairs => CRT TV forum => Topic started by: batman52632 on January 22, 2008,12:49:27

Title: big screen problems
Post by: batman52632 on January 22, 2008,12:49:27

i have a 60 inch big screen projection tv and the screen is blotchy if you remove the screens and look in to each projector lens you can see the picture clear in the red one but the geen one looks like it has a little mold growing in it or dirt and the blue one is the same way but worst you can barely make ou a picture at all how do i fix it can it be cleaned or what

Title: Re: big screen problems
Post by: P.R.Gore on February 02, 2008,14:35:23

G & B guns might be weak. Locate the fault by interchanging crt drive pcb between R & G or R & B. Weak guns become defocus & are difficult to converge to get sharp image. They can be rejuvenated by charger.

Title: Re: big screen problems
Post by: Visualimageservices on February 19, 2008,13:47:17

problem you have is the coolent, this is the oil that keeps the crt face cool, the only way to over come this problem is to replace the tube (comes with coolent) - the earlier barco projectors the coolent could be changed - recent coolent tubes are now sealed

 gerard :)