Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 790)

Section 15B
Replacement Procedures
15B-34
7. Remove the 9 mounting screws along the top and bottom edges of the
push-button MTB panel.
+12V DC
GND
OP11
(out)
OP12
(in)
JPR1
JPR2
CN51
CN52
8. Replace the push-button MTB panel with a new MTB panel.
9. Replace and tighten the 9 mounting screws, then reconnect all cables.
To replace the light bulbs in the push-button MTB panel:
1. Call your A-B sales representative and have them order replacement
light bulb, part number 156780 for your digital MTB panel or part
number 800M--N16 for your A--B 800 push--button MTB panel from
A-B field service.
2. 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.
3. Disconnect the cables from TB1 located on the MTB interface board.
4. Disconnect the cables from TB20 located on the MTB interface board.
5. Disconnect the input interface ribbon cable from CN51 and the output
interface ribbon cable from CN52.
6. Disconnect the fiber optic cables from connectors OP11 and OP12.
15B.20
Replacing the Push-button
Light Bulbs