Heathkit GR-2000 Sold State Color TV

[zeno]

This is one of the RCA clones with SCR Hoz sweep.
Later they did sell Zenith with the System 3 chassis.

Convergence is easy. TIP turn color off & brite & contrast about half way.
In other words dont drive it hard. If its just the top give the top
controls a little bump first to see if one has a bad spot. Also
watch for cold PC on the board, it gets hot there !

73 Zeno
LFOD !

[old_tv_nut]

Originally Posted by zeno

This is one of the RCA clones with SCR Hoz sweep.
...
73 Zeno
LFOD !

Yes, the horizontal is RCA.

Some other things, like the pre-aligned and potted IF filter are unique to Heath. This is a precursor to later TVS (including Zenith) that used SWIFs (Surface Wave IF).

[kf4rca]

Yes it does have SCR output but the oscillator chip is a MC1391.
Attached is the video input mod for the 2000. I used a Maxim MAX405 video op amp which might be a little hard to find these days.
The video goes in at the emitter of Q326. (Q326 is removed.)
I'm sure Linear Technologies makes a similar chip.

[Lain94]

Originally Posted by zeno

This is one of the RCA clones with SCR Hoz sweep.
Later they did sell Zenith with the System 3 chassis.

Convergence is easy. TIP turn color off & brite & contrast about half way.
In other words dont drive it hard. If its just the top give the top
controls a little bump first to see if one has a bad spot. Also
watch for cold PC on the board, it gets hot there !

73 Zeno
LFOD !

It appears that the adjustable inductors on the convergence board just had their plastic hex screws disintegrate over the years as they fell apart when I was trying to adjust the blue left and right. As far as the pot convergence knobs go they all work fine except for the white knob which seems to not react at all. Not sure what to do know, The red and green are almost perfect now but the blue is still way off especially in the left and right parts which is what those adjustable inductors control.