On Tue, Jan 24, 2017 at 09:18:29AM -0500, Neil Cherry via vcf-midatlantic wrote:
I get a nice clean color TV signal (sorry no working NTSC TV) until I bumped the scope and it went out of sync. No amount of fiddling with the buttons and dials helped get back that pretty signal but I could see it was still there.
So now I want to service the Tektronics scope but I'm not sure where to start.
The first is determining what as really failed. Start with a simple signal such as calibrate output/square/sine wave and does it trigger properly with that? Were you using special TV trigger mode or just normal edge trigger. Once you narrow down the failure symptom and find service manual for the scope that will give you where to start looking. There are Tek lists around with people familiar with them that may know the common problems for the symptom.