Zenith 19" Chromacolor II service suggestions

[radiotvnut]

I'll bet the cap either shorted or became severely leaky and caused the resistor to open. As far as those CC2 sets, I was finding them all the time during the '90s. Now, they rarely show up. Currently, I have a 19" Delta-gun entry level set from '78, a motel set from '79 that has the same chassis as yours, and a '75 space command set. The main troubles I had with them were triplers, bad module contacts, and the big oil-filed cap in the power supply shorting.

[Kevin Kuehn]

I've been watching this Zenith on the work bench occasionally over the summer and it's been performing flawlessly. Today I decided to remove the chassis from the front cabinet to remove some dust bunnies before putting the back cover on, no big deal I thought. After reassembly I'm now noticing subtle moire in some solid colored areas. Seems to vary with picture content and sometimes I hardly notice it. In particular cartoons bring it out. First thought was did the degaussing PTC thermistor coincidentally die? I don't think I'm hearing the coil ping when I power on, but I'm not absolutely sure. I tried manually degaussing with my GC coil but that was no help. Anyone have any ideas? Picture attached emphasizes what I"m seeing in the green background. There's a horizontal shading or striping, somewhat with a stationary wave, and mostly in solid color areas.

[zeno]

Moire started showing up on 14" chromacolor hybrids. If the customer
noticed it we were to touch up the focus, brite & contrast. If an in-line
the G-2 also. If they still complained change the CRT.
If you go looking for it its quite common. Blank stationary scenes are best
to see it. Happens on other brands also, not just on Zenith EFL CRT's.

Test for DGS is with a COLD set. Hook up an ANALOG AC ampmeter on
the AC line or use a Power rite etc. Turn on the set while watching meter.
The meter will swing very high then settle at apx .75 amps with normal pix.

73 Zeno
LFOD !

[Kevin Kuehn]

Using my Amprobe on 6A scale I'm getting about 2.25A for 2 seconds on cold turn on. Then settles to less than 1A. Seem reasonable?

If moire is that common I'm gonna just try'n not worry about it.

Thanks again for your expertise.

Originally Posted by zeno

Moire started showing up on 14" chromacolor hybrids. If the customer
noticed it we were to touch up the focus, brite & contrast. If an in-line
the G-2 also. If they still complained change the CRT.
If you go looking for it its quite common. Blank stationary scenes are best
to see it. Happens on other brands also, not just on Zenith EFL CRT's.

Test for DGS is with a COLD set. Hook up an ANALOG AC ampmeter on
the AC line or use a Power rite etc. Turn on the set while watching meter.
The meter will swing very high then settle at apx .75 amps with normal pix.

73 Zeno
LFOD !