Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set User Manual
Page 797
Section 15B
Replacement Procedures
15B-41
The logic board(s) is the circuit board(s) mounted directly to the face of the
servo amplifier. Generally replacement can be accomplished without
removing the servo amplifier from the cabinet.
To replace the logic board on a servo amplifier:
1.
Turn OFF all power to the control and the servo amplifier.
ATTENTION: To guard against electrical shock hazards, never
make connections or disconnections at the ac distribution
network unless the main ac disconnect switch is open (off) and
locked.
Important: The use of a ground strap is recommended to prevent static
discharge to any of the sensitive electronic components on the servo
amplifier logic board(s).
2.
Carefully label and disconnect all wires and connectors to the logic
board(s).
Important: Labeling is essential since some connectors are the same size
and could be accidentally interchanged.
3.
Disconnect the chassis ground wire from the logic board(s). If the
ground wire is soldered to the logic board, it will have to be
disconnected at the chassis, just to the left of TB1.
4.
Remove the screws that secure the logic board(s) to the servo
amplifier chassis.
5.
Carefully push the wires and connectors to the side and remove the
logic board(s).
6.
Install the replacement board(s) by reversing the removal procedure.
First position the board(s) on the chassis and verify that all wires and
connectors are accessible.
7.
Install and tighten the screws that secure the logic board(s) to the chassis.
8.
Reconnect all wires and connectors, including the chassis ground wire.
15B.25
Replacing the Logic Board
on the Digital Servo
Amplifier