Rockwell Automation 1391 INSTR/DIGITAL AC SERVO DRIVE - Manual (Page 2)

1391-DES Circuit Board Replacement
Instructions
ATTENTION: To avoid a shock hazard, assure that all power
to the drive has been removed before replacing any circuit
boards.
!
Display Board Substitution
1. Remove all power to the drive branch circuit.
2. Remove the front cover from the drive.
3. Loosen the 4 thumb screws and remove the cable between the Display
and Logic Control Boards. Remove the Display Board.
4. Install the new Display Board. Reconnect cable.
5. Apply power to the system and check for proper operation – tuning is
not be required.
Memory Board Substitution
1. Remove all power to the drive branch circuit.
2. Remove the front cover from the drive.
3. Remove the Memory Board from the Logic Board by squeezing the
nylon latches.
4. Install the new Memory Board.
5. Apply power to the system – tuning will be required if the board is a
new replacement part. Refer to the 1391-DES User Manual
(publication 1391-5.3) for tuning information. If the Memory Board is
from a programmed, operational drive, tuning is not required.
Logic Control Board Substitution
1. Remove all power to the drive branch circuit.
2. Remove the front cover from the drive. Label and remove the ribbon
cables and signal connectors (TB1 and TB2) from the Logic Control
Board.
3. Remove the Memory and Display Boards per previous instructions.
4. Insert the replacement Logic Control Board.
5. Replace the Memory and Display Boards and reconnect the signal
connectors/cables previously removed.
6. Apply power to the system and check for proper operation – tuning is
not required.
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