Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 788)

Section 15B
Replacement Procedures
15B-32
4. Disconnect the cable running from the operator panel power supply to
the keyboard I/O ring interface.
5. Disconnect the cables running from the operator panel power supply
to the MTB panel and the HPG’s.
6. Loosen the 4 mounting screws on the operator panel power supply.
7. Slide the operator panel power supply out of the mount and replace it
with a new operator panel power supply.
8. Tighten the 4 mounting screws on the operator panel power supply
then reconnect all cables.
To replace the rotary MTB panel:
1. Turn OFF all power to the control.
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 and
locked.
2. Disconnect the cable running from the operator panel power supply to
the power supply terminals on the rotary MTB panel I/O module.
3. Disconnect the I/O interface cable running from the connector
(CN16F) on the sub processor board to the rotary MTB panel.
4. Disconnect the cable running from the E-Stop terminals of terminal
block BT-20 to the E-Stop terminal block BT01 on the motherboard.
5. Disconnect the cable running from the power ON/OFF terminals of
terminal block BT-20 to the ON SW/OFF SW terminals on the main
power supply.
6. Disconnect the fiber optic cables from the MTB panel I/O module.
15B.18
Replacing the Rotary MTB
Panel