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Your first order of bussiness should be to take an HV probe and confirm your HV and focus voltages match that listed on the schematic. (I may have the schematic if needed) If the trippler was run with a wire removed it may have been damaged.
Next order of bussiness once the above is dealt with is compare the gun bias voltages to the schematic and see why your brightness is excessive. Trace found voltage annomalies back to source. Once brightness is sane if you still don't have video use an oscillo scope to trace video from the detector (sound is usually split from video IF just past video detector) forward towards the CRT and look for the point you loose it....Or inject video from a service test pattern generator from to the CRT and work your way back towards the detector till you loose it. Once you have identified the point it drops out at sart testing components and voltages there till you find something.
The only part of the inside of a CCII that needs to be clean is the electrical contacts (modules, tuner, pots, etc)...When these sets were new more than one was left on in house fires and continued to run after the fire was put out...Perhaps my favoirte story of such a set the outlet stayed on and the front of the set was completely covered in soot, speaker cone burned, knobs melted, etc...The firefighters noticed a flicker at the edge of the screen and wiped the screen to reveal a perfect TV puicture beneath the soot...CCIIs don't die without as much help doing so as they can get.
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