2931 b+ measurements how?

[8bitforlife]

could someone show me in pictures how to measure the b+ on a 2931 and while your at it maybe a 2930

I dont think mine is set correctly and telling me a number to take measurements frok isnt going to help. I am a newbie at this stuff so I'm still learning so pictures would help best. I would

 

[rewrite]

TP921 is where you measure B+ on a 2931 (thank you, Google). 180V is what you're expecting.

Honestly, you're going to have to pull it out, and read the markings on the silk screen until you find TP921.

https://wiki.arcadeotaku.com/images/3/34/MS-2931_Service-manual_full.pdf

Page 48 shows it sitting somewhere between the flyback and pot VR501. Should be relatively easy to find with that knowledge.