Quote:
Originally Posted by consoleguy67
Hi All,
Now I have another problem. What would cause the focus to suddenly go blurry, and then come back? I've adjusted the focus control, and the Peak Picture control, and it will help. Sometimes the picture is crystal clear.
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Does your set use that MASSIVE resistor to divide the 25KV HV line down to obtain focus voltage? If so it may be drifting.....Mine did a bit of mild fluctuation then stuck at bad focus, I cured it by adding some resistance to the resistor from the focus pot to ground, then it relapsed.....About three lather, rinse, repeat cycles later it stabilized long term (been good 3-4 years now) and no longer drifts every 2-6 months.
The correct way to fix it is to replace the big one, but since my 12B13C52 chassis is a daily driver, and I was broke during that time it was faster (try finding a part like the HV divider in less than a day), cheaper and easier than hunting up a proper replacement for the real culprit.