Are these things I should consider bad

[TinCanAlley]

Just made a discovery. As most will recall, I can't get the setup line to show. That was until today. I managed to get the line to show, but under conditions outside of the normal setup procedure.

I set the switch into setup mode and there was no line. I then pulled the red tap off, completely and a bright red line showed up. I then did the same to the blue and green and got a bright whitish line in the center of the screen. Now outside of setup, the screen is way too dark to be useful. I then checked the voltage on the blue video output driver (yellow/blue wire on crt #11). It is 188 - 190V in setup with the tap in any of the HI, MED or Lo position. However, when I remove the tap connection it drops down to 132V and that when a very bright blue line shows up.

The Sams says to do this with the taps on "HI", so something must be off to keep the line from showing up with the haps connected.

So, does this new information give anyone any ideas as to what the problem might be? Is there something I should be measuring while the taps are disconnected? The collectors of the video output transistors?

[TinCanAlley]

Okay, another update and question.

Since finding out that disconnecting the screen tap wires from the taps allowed the setup line to appear, I decided to check voltages. I found something I don't understand, and therefore, don't know if it's normal.

I am attaching a pic from the schematics for the video outputs and screen taps. In it you'll notice that the screen taps get voltage from the collector and the 240V boost through a series of resistors. Those are the supply connections. Then there is the tap wire that you move from tap to tap. That wire receives the voltage and it is connected with a resistor to the CRT socket. That lead has no power indicated on the schematics unless it's connected to one of the taps (hi, med or lo). However, when I disconnect the lead and check it, it has 133V on it. If I disconnect the CRT socket and run the set, the lead has 0V. It's the same for all three colors. Is that normal? Should there be voltage on it from the CRT side? On all three colors?

Maybe I'm not fully understanding how this section is designed to work.