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REPLACEMENT PROCEDURES (continued)
4.24
CCC (Central Communication Controller) Assembly
The CCC assembly is located in the monitor housing between the monitors and
the outside wall of the housing. The assembly comprises two circuit boards: the
main PCB and the interface PCB. Figure 4-24 shows the external connections
to each circuit board and the mounting arrangement of the assembly.
4.24.1
Set the System Power switch to STANDBY and remove AC power
from the machine.
4.24.2
Disconnect any external serial interface cables from the back of the
monitor housing.
4.24.3
Remove the two monitor housing back cover retainer screws, and
swing open the back cover.
4.24.4
Remove the top shelf from the monitor housing and disconnect its
ground wire.
CAUTION:
4.24.5
Disconnect the power cable from J10 on the main PCB.
4.24.6
Disconnect the ribbon cable from J12 on the main PCB.
4.24.7
Disconnect the ground wire from the monitor housing.
4.24.8
Loosen the captive mounting screws holding the assembly to the floor
of the monitor housing.
4.24.9
Carefully lift the assembly and disconnect the ribbon cables from J3,
J4, J5, and J7 on the main PCB.
4.24.10 Disconnect the backplane cables from J2 and J3 on the interface PCB,
and remove the assembly.
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The circuit boards in the CCC assembly contain static sensitive
devices. Use ESD protection when handling this assembly.
4-88
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NM3
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Troubleshooting
