I need help with a problem with my SX3. When I turn the power on to the mill the green power indicator light comes on, the spindle speed LCD display blue back light comes on, but there is no indication on the display. I mean nothing on the display.
Also, if I try to start the spindle motor by hitting the start button, nothing happens. It is as if the machine is dead.
The model number on the motor controller is: FC1000WJYA(6.2) with a manufacture date of 2006.07.25.
Things I have checked are:
1) 20 amp fuse on AC power line is good.
2) 20 amp fuse on motor controller is good.
3) checked for loose connections and everything is tight.
4) looked for burn spots or burned up components on the PCB and none were found.
5) 8 wire connector at the bottom of the board has the following voltage readings relaive to ground.
S1 K3 K4 +5V GND SA SB SC
83Vdc 80Vdc 80Vdc 6Vdc 0Vdc 0Vdc 6Vdc 0Vdc
Kind of odd to see 6 Vdc on a connection labeled +5V but I traced it down to an LM7806 (6 volt regulator) and the PCB is stenciled 7806 next to the part. Go figure.
6) The connector on the right hand side of the PCB where the 120 Vac comes in has the following readings relative to ground.
L1 N1 FG U V W
125Vac 0Vac 0Vac 14.8Vac 14.8 Vac 14.8Vac
7) Checked the wiring harness for continuity from motor controller to push button PCB located on the front of the machine. Wiring harness checked out with no shorts.
8) Checked the tapping button electrical switch for shorts or grounds. None found.
I would appreciate any help in getting the mill back up and running.