1A5/Repairs
Design mistake. The UNCAL lamp is powered by "+100V DCPLD A" which shifts the trace about 0.1 division. It should be powered from the basic +100V rail.
Serial Number B124386
SYMPTOM 20220520. Actually old, just noticed now. Vc has long asymptotic tail. CAUSE: Leakage in C114, 1uF 25V NP aluminum electrolytic. ACTION: Replace with 1uF 25V X7R ceramic a la Type W. FIXED
SYMPTOM 202205. Old, just slowly getting worse. Clear V/CM knob skirt is cracked and slipping. NOTE: Part #74 in mechanical diagram, 366-0418-00. ACTION: Super-glue plastic hub to metal hub OOPS: Super glue dissolved a mark ACTION: Redraw with Sharpie FIXED