Motorola 19K1 restoration

[bandersen]

Originally Posted by nasadowsk

Mine (I've got the console!) is on my bench - the horizontal section's giving me fits and it syncs like crap hopefully i'll get it sorted out this fall.

The knob on the lever is the fine tuning adujstment, for when the cover's off. It's a weird set, that's for sure...

(And yes, a 25L6 with a step up auto XFMR for the vert output. Like I said, it's a weird set...)

Adjusting the hor. lock really helps with the sync on this set.

I took a closer look at the channel selector and still don't get the fine tuning. It looks to me like the only adjustment is the tuning slug for each channel. That level with a hole in it just acts as a guide for an adjustment tool. Is that what the service manual means by a fine tuning control


I added a second HV cap and a carbon comp 470K resistor to form a PI filter like the schematic shows. I used rounded solder blobs and it seems to work OK. No arcing so far. I was able to get most of the dark crud off the flyback too. That red splattered stuff is high voltage insulating "paint" applied during some repair long ago.


This seemed to produce a brighter, crisper picture, but two dark lines appeared on the left. I cranked the hor. drive all the way down (clockwise). That mostly got rid of them but the brightness suffered. I tried a couple different 6W4s, but that didn't make much difference. Also, the horizontal width coil is warm - not sure if that's normal. Perhaps I should remove that second HV cap after all