Somebody at your HFO is smoking crack. A Vector Drive might be 4-large, but not a stupid DC power supply in a TM-1.
You're closer to correct: I'd say that you have about $500-700 worth of components in that power supply. I don't think there is much more in it than a really big rectifier, a couple of huge capacitors and a circuit board. They're not cheap to rebuild (those caps are around $100 each), but the good news is that I doubt there's anything wrong.
Power has been absolutely whacked in the southwest, lately. I'm getting power dips right now (as I'm typing) where I can hear the A/C slow down and the lights dim slightly. Here are my guesses:
- One leg of your incoming power is more heavily loaded by something else on the circuit (110V blower for your HVAC unit?). When it fires up, that causes a single-sided dip in the power to the machine, it panics and errors out.
- The grid is just all wonky and you're getting slight dips in power. A momentary dip is probably all it takes to get an error. My VF-2 used to throw a low-volt error whenever I would do a toolchange. The problem? The incoming voltage was at the lower limit of the transformer taps, the toolchange went from zero to 10K RPM and the 3/4 HP coolant pump fired immediately after the spindle-start. Wham! Instant low-volt alarm. I had to rewire the incoming power on the transformer to get it into range. The next problem was a few days later when they upped the grid voltage another 4-5V to make up for lost current. Wham! High Voltage alarm. Sometimes you can't win. I consider retapping the transformer part of the seasonal maintenance now.
If it does end up being the power supply, I think the replacement was around $1500. The one in my TL-1 suffered infant mortality and was dead within the first 50 hours. It was covered under warranty, but it would not have been a $4K repair either (bet you're glad to hear that ).