Quote:
Originally Posted by vol.2
I've encountered sets that were fairly clean inside (but not so clean that they had clearly been washed up) with burned up resistors, etc.
Some TVs just had kind of bad power supply designs.
However, if you're seeing dark spots in the deflection area, that kind of sounds like high hours.
In general, the amount of soot on the flyback and the bell housing of the CRT is a much better indicator of use because the high voltage attracts the soot.
If it's got a lot of soot, and it has dark spots on the boards near big power resistors and the deflection, you are looking at a high hour set.
"Soot" is different that "dust" in that it's very fine and usually black. The high voltage attracts tiny particles in the air and they stick directly to the internal surfaces. The "dust" will just be solid dirt and bunnies inside the thing.
Likewise, if there's a lot of soot and no burn marks, it's also probably high hour. Not all sets had power supplies that burned up the PCBs. Personally, I see that a lot more in sets from the 80s where the part count is started to get reduced, but they don't have the simplified and optimized designs that started to appear in the mid 90s.
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How many hours would you consider high hours? Chances are that my Panasonic set is a higher hour set. There was some soot on the tube and on the flyback but not a huge amount. I will say that the picture still looks very good. I always thought it was a low hour set until I took the back up. One other thing is that this TV has 1 composite input on the front and on the top of the PCB where this composite input is, the PCB is black around some of the components. It's not charred by there is a black color. The bottom of the board is not black at all. I'm wondering if the set is still safe to operate if there is a little bit of black on the PCB?