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  #31  
Old 11-27-2012, 12:48 PM
old_coot88 old_coot88 is online now
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Originally Posted by Phil Nelson View Post
Working in stages is good advice. I begin with the electrolytics in the power supply, since all else depends on them.
In addition to the electrolytics, there is one non-electrolytic that should always be replaced routinely before power-up. That's the coupling cap going to the grid (G1) of the Hor.output tube. Any leakage in this cap will cause the tube and flyback system to pull excessive current.
G1 will be pin 5 (assuming the tube is 6BQ6 or 'DQ6).
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  #32  
Old 11-27-2012, 01:22 PM
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Phil Nelson Phil Nelson is offline
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Originally Posted by Raddion View Post
I was wondering about that yellowish dust! Will it be difficult to get off of there, yikes....
It cleans off easily with a liquid cleanser and paper towels. Wear rubber gloves and don't lick the stuff, and you will be OK. This is oxidation of the cadmium plating, so your goal is just to clean up the dusty stuff, not remove the plating or make it shine like a mirror (which it never did, anyway).

If a chassis is very greasy & dirty underneath, you can stand it on its side on some newspaper and clean with a spray bottle of cleanser (I like isopropyl alcohol) and a soft brush. Work from top to bottom and dab up the excess with paper towels. Alcohol is nice because it evaporates without leaving a residue.

Phil Nelson
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