Need Help!- VMC1000 HD Failure

[KevinV_MEI]

Machine started fine this morning, ran for 2 hours and faulted with and error. Operator came to me, I told him to restart the machine. Came up with Disk Identification Error. Nice, hard drive failed. Go get two more at the store, came back, put one in, it doesn't spin. Put it in a pc, spins. Hmmm check voltages from power supply, 5.3 v red to ground, 10.6v brown to ground, should be 12v. Low voltage coming out of power supply, HH tech feels it isn't that far out of spec.
Took a pc and used the PS and tied it to the HD and the controller recognizes the HD.
Check power going in to TNC controller, 200V and 300V, (see attached pic's) should be 400V each leg. Power coming in to machine is right at 250V, all three legs, transformer is wired correctly for this voltage.

Any thoughts? I'm schooled just enough in electronics to know what not to do. I have all of the schematics but cannot find the LE426 and where the power comes from.

[KevinV_MEI]

I've attached a schematic and voltage readings to help explain what I'm finding. If anyone has a thought chime in I'm open to suggestions.

[gus]

I noticed on mine that there are several transformers, one of which did not have the correct wiring for years.

Yours must have the TNC426 [option] so it differs from mine[tnc410]

[KevinV_MEI]

Thanks Gus, yes it does have a 426. I am having Galco here in Madison Hgts Mi look at the power supply. All indicators lead to it's being defective by only putting out 10-11vdc.

[KevinV_MEI]

Power supply checks out ok. Reinstalled, removed one serial connector at a time and checked HD voltages. It appears to be connector X12/V58 causing the voltage drop. Anyone know what this is used for?

[KevinV_MEI]

X12 is for the probe. Earlier in the day before it error-ed I washed the inside of the machine. I may have hit the cable for the probe. There must be a crack or damaged area on the cable and water shorted out the probe circuit, causing a low voltage condition. Unplugged it at the controller and good to go.