Quote:
Originally Posted by Jon1967us
Another idea that ham friend, who is also very experienced in TV repair suggested, was to inject a 1Khz signal (using a .1 uF) along the signal path and see where there's a hard stop. The 1Khz signal should display black bars (according to him) on the screen. Injecting at a point where black bars don't display on the CRT is supposed to indicate the location of failed component.
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Works best with a square wave or pulses which are rich with harmonics... read here about the “mosquito” signal injector, a very useful device.
https://stevenjohnson.com/donbosco.htm
jr
02-17-2019, 02:12 PM
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