I know this may sound mondane, Did you trying unplugging the machine and waiting for a good 5 minutes (Xerox Techn's usually just say 2 minutes). And then plugging the machine back in, This fixed one issue that I ran into.
If its still rebooting, I would suggest re-installing the Firmware. Just to rule out software related issue.
Another time this was happening, When trying to re-install the firmware it got stuck at the network controller. So I had to have a Xerox technician to come on site and he agreed that the controller was bad and changed it. Has been working great since.
We have a WC3345 doing the exact same thing.
It is definitly NOT power.
Try unplugging it from the network.
Ours only reboots when connected to the network. I changed the IP and it was good for a day and then started again, so it looks like a Denial of Service attack. I can only see IPv6 activity in our router but have not looked closer. I've turned off IPv6 on the printer but it does not help.
The only alerts I see in the system are 07-500 which I believe is the bypass tray being empty.
Printer is on the latest firmware. No other printers in the network including other brands and production Xerox machines have a problem. Only this printer.
Eliminate the obvious and move it to another power outlet. If it is plugged in via a power bar, remove it from the equation. Things like this are not simple to diagnose because there are simply too many failure points and you probably can't get to a point where you c an find out what the fault code is. So eliminating a faulty power is a simple step 1.
Our Phaser 6700 just started restarting on it's own. It will restart, warm up, print a configuration page, a couple minutes later, it will restart and the cycle repeats. It won't allow anyone to print, when someone tried to print when I was over there, the screen went black and the printer rebooted. The LED light blinks green but it seems like it's a constant blinking. No real pattern other than blink blink blink. Any help would be greatly appreciated.