Davewm has you on the right track. All the waveforms are shown on the
conv socket if you got the sams. Convergence probs are
rare, tube zeniths had diode packs go & left blue pots.
your biggest hint is if any controls dont work or
barely work. And dont forget you often have to go back & forth
allot sometimes inc. the middle.
BTW the right is always the hardest.
73 Zeno