Hewlett-Packard 8643a Signal Generator Diagnosis and Repair

DISCLAIMER: These videos show my way of doing things. Don't necessarily follow my advice, I could be wrong. You are responsible for your actions. Not me.
Big thanks to Jack @ / vintageelectronicsgeek for the updated manual links.
User Manual - usermanual.wik... ; www.manualsdir...
Assembly Manual - elektrotanya.c... ;
userequip.com/m... ;
Data Sheet - www.testequipme...
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Since the 8643 & 8644 are referenced together (not sure of the differences), here is a doc on it:
Operation And Calibration HP 8644A - pdfstream.manua...