04/2016
4-15
Phaser 4600/4620/4622 Printer Service Manual
REP 3.4
4 Repairs and Adjustments
Revised
REP 3.4 MCU Board
Parts List on PL 3.10 Item 3
Removal
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: After removal of the MCU Board, move the MSOK board, located in CN4 at Red arrow in
Figure 1, to the new board.
1. Remove Tray 2.
2. Remove the Duplex Unit, REP 10.1.
3. Remove the MCU Board Cover, REP 28.1.
4. Remove the Right Cover, REP 28.2.
5. Disconnect all harness connections to the MCU Board.
6. Release the harnesses from 1 harness clamp.
7. Remove 3 screws (metal) that secure the bracket to the chassis.
8. Lift the assembly up to remove the MCU Board and bracket, Figure 1.
Figure 1 Remove the MCU Board and bracket.
Replacement
After removal of the MCU Board, move the MSOK board, located in CN4 at Red arrow in Figure 1,
to the new board.
CN20 is not used and may, or
may not, be on the MCU.
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