I have a zenith big screen that has a red picture it is a PVR6069 RK took the front cover off and the tubes are working. I believe this is a module type board dont know which one to change or what to to do. Would like to fix this my self sounds like i can get rebuilt modules online any help thanks Randy I have a e-mail of email@example.com
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Re: Red picture with a Zenith big screen
Here is some info I found on your TV:
That resistor is located on the CRT board of each gun. Ususally if an image is predominantly one color then that color gun has a bad 120k resistor on it's crt board.
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THE TUBE IS CARBONIZED -IF YOU HAVE A TECHNICAL KNOWS PUT 9V CA or CC IN FILAMENT AND A LAMP MAX 15WATTS IN SERIE WITH ANODE AND RED GREEN BLUE CATHODE (ONE AT TIME) -OFF FILAMENT AND YOULL SEE SPARKS INSIDE THE TUBE WHEN DESCABONIZE. REPEAT AT LEAST 3 TIMES
It could be that the picture tubes have gone down on emission, there is a prcedure that can be tried to bring up the overall brightness but it is just possible that you will loose some picture quality. If it's a 1994 projo tv i am thinking of the three crt system, a gray scale alignment would probably correct the dark condition in your picture, again depending on how far gone is the emission in your picture tubes, if your projo tv is the dlp system, the bad news is that you could be needing some light engine repair. The color adjustment is possible with the availability of a service manual or in the case of the dlp system, light engine repairs or replacement are available from some on line stores.
It sounds like your looking for a CRT (red) the part # is on the CRT and could be puchased through any Zenith (LG) distributer- usually around $300- $500. Google the part # when you get it and you may find a used Picture Tube (CRT)for cheaper.
Chances are, if it's an older set, componants have changed value through use over time, which also includes the picture tubes and associated driver circuits. The way to compensate for this color drift is through adjustments. Either turn the red down a little, or turn the blue and/or green UP. Be carefull though as there are potentially dangerous voltages in and around the circuit boards and picture tubes.
This is very typical of a Zenith set.Your picture tube will have to be replaced.One of your 3 primary colors (red,green,&blue) have turned off leaving you with the color of the dominant color.I would heave it.