Just a success story with a very minor repair and hint to others later:
Today fixed two 602's with SAME fault (no spot, no HV) - fuse F217 had
Reason for blown fuse was C216 and/or C217 electrolytics had failed short.
The Bussman fuse MDL-1 is still available from Mouser.
Hope this saves someone some time or saves a 602 unit. They are
beautiful when running.