9-14
9.3 Main Control Unit
Removal
1. Perform the post-operational checks to shut down
the system.
2. Turn OFF the built-in circuit breaker and
disconnect the power supply cord from the wall
outlet.
When servicing the electrical section parts, make
sure the built-in circuit breaker is turned OFF and the
power supply cord is disconnected. If the power
supply cord is connected, electricity will flow as far as
the power supply unit, and this can cause electric
shocks and/or short-circuiting.
3. Remove the screw securing the interface (1394)
cable clamp.
4. Disconnect all cables from the main control unit.
q
Power Supply Cord
w
Mouse Cable
e
Full Keyboard Cable
r
Operation Keyboard (USB) Cable
t
MCU1 [Power Supply (1394) Cable from Power
Supply Unit]
y
MCU2 [Image Processing Signal (1394) Cable]
u
Monitor (CRT) Cable
i
Interface Cable (1394) Cable
5. Remove the main control unit
Installation
Installation is essentially in the reverse order of
removal.
NOTE: After installation, perform the following operations.
• Printer and scanner driver installation
• System software (A1) reinstallation
• Optional software reinstallation.
• Backup for refreshing
9.3.1
Main Control Unit Replacement
Z
2
028
Clamp/Screw
Interface (1394)
Cable
Z
2
027
q
w
e
r
t
y
i
u
Z
2
515
q
e
w
r
t
i
y
u