Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 202)

PC NC Maintenance Manual Chapter 6: Module/Unit Replacement
6-20
6.6 Noise Filter
Remove the noise filter as follows below.
1. Turn the main power OFF and ensure that the rack power supply switch is in
the “O” position.
2. Disconnect all the wires from the noise filter.
3. Remove the noise filter by loosening the two mounting screws.
Install a new noise filter as follows.
1. Mount the new noise filter on the existing location and tighten the two mount-
ing screws.
2. Connect all the noise filter wires on their original locations.
Following installation of the noise filter, verify functions as follows.
1. Return the CPU rack power supply switch to the “I” position and power up to
restart the control unit.
2. Verify that Windows NT boots up correctly.
3. Verify that the +5V and +24V status lamps on the NC card are lit.
4. Verify that the NC card operates normally by looking at the moving pattern of
the status lights 1, 2, 3, 4.
5. Verify that the NC operates normally after the SERVO ON switch is pressed
and no alarms show on the MMI screen.