This is the general problem with FM tuner alignment. You need to understand what needs to be done and why, because every procedure I've ever seen is lacking in one way or another. There are also several ways to accomplish some steps and my guess is the factory did it one way, then wrote procedures for the outside world using some other way. I don't know the OPs level of expertise, so my suggestions may be too much or too little. Being easily available, I'd look at the service manuals for various Marantz receivers and tuners from the same period. They tend to do things the same way. The tuners are not entirely unique. It might even be useful to read some other manufacturers procedures. This is the educational phase. Even grab a copy of the manual for a Sencore SG-165 because it has a lot of useful general alignment info. Find out about coupling methods because most of the time you don't just hook the test equipment to the circuit. You need isolation caps and dummy antennas. Break the problem down into separate sections. As handy as the built-in scope may be, I'd do the alignment of each section in the traditional way, then address the scope by itself. The problem will be if some section has an actual fault. You have to know what's normal and expected, so you can raise a flag when the results don't jive with how things should work. What you want is to be able to say with certainty that a given section, IF, discriminator or whatever, is aligned and working correctly, so you can forget it and move on to the next. Prevents going around in circles. As for a better procedure, one would need the unit on the bench in front of them to rewrite it. I've done it for a couple, and it's harder than you think to get every detail recorded. If there are undocumented adjustments you need to determine what they are. Don't touch 'em until you know what they do. Could be traps or something else.