Commodore PET 3032 (2001N) video circuit repair @iz8dwf

iz8dwf | Commodore PET 3032 (2001N) video circuit repair @iz8dwf | Uploaded October 2017 | Updated October 2024, 1 hour ago.
Commodore (CBM) PET 3032, 1980 vintage, S/N: 1329921. 2001N-32 variant. Repair of various faults in the video generation circuit.
During IEEE-488 test, a bad port bit on the MOS-6522 showed up, so the VIA has been substituted too.
Not shown in the video: swapping the DRAM banks CAS resistors to understand if the pettester image would produce a different pattern (not the case, obviously). This bank swapping has been helpful on another PET 2001N repair:
youtube.com/edit?o=U&video_id=H5_mTETwWJk

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