Zenith 17" Space Command color set from 1982

[zeno]

Originally Posted by radiotvnut

I think the best System 3 chassis was the first one with the 9-153 horizontal sweep/HV module and I don't recall running into a bad flyback on one of those, but those didn't get all of the operating voltages for the set from the flyback and that likely put less stress on the flyback.

Agree. Probably the most reliable Zenith built. And the BEST greens of any set.
Cold joints at Hoz drive transformer were 90% of the fails. After that
just a scattering of odds & ends.
A little more on CC2 XXX chassis ( S-3 style) & System 3
A few late J line high end 25" sets were built with the new XXX chassis.
They were NOT marked System 3.
K line System 3 came out on all but the leader models. System 3
was just a feature list. If it had the full list it was called a S-3.
J & K line were first gen XXX chassii , still had PWR transformer
and a normal H drive & output design.
L-line starts gen 2 XXX chassis. Transformer gone, replaced by a
complex H drive & out. They could also shoe horn it into a 13".

Why no FBT's supplied ? For us a 9-160 module net exchange
was $66. Buying a similar FBT, H out & a hand full of small parts would
approach that. But swapping the board takes maybe 4 mns & a
complete repair 15 mns. So a lower labor rate & total cost is
about the same.

Last the spark gap. It belongs in the hall of Zenith fame. We saw
many sets in for a different reason with blasted gaps. Normally
on a modern set seeing that throws up a stop sign. You will
often have a totaled set on your hands.

enuf fer now
73 Zeno
LFOD !