1981 RCA VFT-650 has me stumped

[TUD1]

Well I decided to scrap the VFT650 and use it for parts for my PV-1770. The latter had a cylinder drum that was so locked up, it was hard to turn by hand. I took the entire cylinder drum out of the VFT650 and put it in the PV-1770, and it spins perfectly. All the PV-1770 needs now is a couple belts and an idler tire.
"I AM THE VCR MASTER! MWA HA HA"

[Ed in Tx]

Originally Posted by TUD1

All the PV-1770 needs now is a couple belts and an idler tire.

Not quite. Any time you replace a drum assy you should to do a tape path alignment, the cylinder servo alignments and head switching phase alignment, ACE head position (or "X-value") and tracking center. Even taking out and putting back the same drum isn't a sure thing it will be in exactly the same position. There's a slight amount of play in the fit of the drum to the chassis. But maybe you got lucky and are pretty close. At least it makes a picture!

[Electronic M]

Originally Posted by TUD1

Well I decided to scrap the VFT650 and use it for parts for my PV-1770. The latter had a cylinder drum that was so locked up, it was hard to turn by hand. I took the entire cylinder drum out of the VFT650 and put it in the PV-1770, and it spins perfectly. All the PV-1770 needs now is a couple belts and an idler tire.
"I AM THE VCR MASTER! MWA HA HA"

I'd have taken some penetrating oil and tried to free up the old drum first...If a part is nearly shot there is no harm in trying to fix it before changing it.