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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 by squeezing the nylon latches.
4. Install the new Memory Board.
5. Apply power to the system – tuning will be 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.
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
should not be required.
Chapter 11
Troubleshooting
11-3
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