Pin = pincushion
NAP had a lot of trouble with rattling ( vert ) yokes must of been
early to mid 90's sets, L chassis IIRC. We used to spray
them with something but cant remember what from the hardware
store. Takes 2-4 coats but it silenced them. That was via NAP TA.
OH BTW no Zenith manual.
73 Zeno
