1984 19" Zenith & others

[radiodayz]

Nice haul! They all look interesting.

[zenith2134]

Hey, Zeno that is interesting about the 'auto color' bypassing. My '86 model with the 9-470 ought to have this done too, I'm guessing? I'm being lazy, since I have already taken it apart twice, while fixing the color purity issue. I have no complaints about its color fidelity, but there is no auto color switch, just an afc switch.
In storage, I have quite a few 80s Zeniths with some using the 9-181, so I'll have to look into the mod on those. Some have a 'chromatic' switch, which is basically an auto color ckt.

[zeno]

I dont think the 9-470 had the problem. As I remember it was on
first year "custom" series sets. I think they updated the IC but I
dont remember a part # change. IIRC it was a Hitachi IC & there
sets looked orangy too. If you do a 9-470 I would be careful &
refer to schematics first.
Sets with the switch looked fine with it off. Thats what told me
something was up. Same board, IC & CRT but the pix on the
cheap ones looked like dog doot.
For purity issues on these usually you need a small correction
magnet on the bell. Someone else here a few weeks ago did
his & used a piece of refrigerator door gasket magnet.
Very clever.........And came out perfect !

73 Zeno

Originally Posted by zenith2134

Hey, Zeno that is interesting about the 'auto color' bypassing. My '86 model with the 9-470 ought to have this done too, I'm guessing? I'm being lazy, since I have already taken it apart twice, while fixing the color purity issue. I have no complaints about its color fidelity, but there is no auto color switch, just an afc switch.
In storage, I have quite a few 80s Zeniths with some using the 9-181, so I'll have to look into the mod on those. Some have a 'chromatic' switch, which is basically an auto color ckt.

[zenith2134]

That was me! On the 1986 zenith in question. I have been impressed with the pix quality of it; I view some Dvd content on it nightly. I swap a variety of sets in and out as my 'daily watcher', and use one of those Blonder Tongue agile modulators as a whole house xmitter. The rest of my TV collection is set up in a spare room, and in storage. By the way, this set has Hitachi ICs all over the 9-470 main module, dual inline pin, LSI to VLSI chips.These are small mainboards with a plastic case horiz out..not a TO-3 case. Probably among the last sets made in USA.