Diagnosing A Marantz 2250B: No Power To Tuner Or Stereo Light

What tools do I use? https://youtu.be/MLK649c1_fM 1:02 - Boring schematic stuff 5:17 - Checking voltages 6:40 - I actually fix it Zener diodes are something I generally replace in a restoration because I've seen them fail in other units as well. This is a very basic approach to repairing vintage Marantz receivers, so if you ever wondered how it's done, this is a good peek into what goes on!