I also when up line and checked the voltage there. There is nothing, 0 volts on the 600vdc line. I checked the vom's manual it can handle up to 1,000 volts ac or dc providing I have the right high voltage prob. But I am not testing anything like an old tv that needs the high voltage prob.
I do hope that the, "1,000 volts" is a misprint or typo on your part. The High Voltage Probe would be easily capable of measuring 25 times that level or more. 1KV (1,000V) wouldn't accelerate electrons enough to make a CRT TV screen happen very well at all. 25KV, on the other hand, is in the ballpark.
You also say, "zero volts on the 600vdc line" but don't mention what the voltmeter setting is when you report that. And since we've already been through that as regards the dual 247V line, are you perhaps again mistaking the meter's report of an overvolt situation as being "zero volts"?
Just in the way of example, if your meter selection reads 600V, and you are trying to read a voltage on a testpoint that the schematic identifies as "600V" well, the realworld voltage might be a little higher than 600 and the meter is thus once again in the situtation where it must report an overvoltage situation that you may be misreading as no voltage at all. A dangerous situation, too, as you may be thinking that certain parts of that circuit can't bite you at the time.
Be careful in there.
And, it may be time to pick up another DMM that has higher voltage ranges on it, suitable for boat anchor work. The imported meters can represent very good value and won't break the bank. Tenma. Good stuff. But even the lowcost meters sold by Harbor Freight can do the job as far as troubleshooting goes.