Symbol Name Removal Procedure
PWB-A Main Control Board Swing down the Front Door. → Release and swing up the
Upper Half of the copier. → Remove three screws that
secure the Upper Rear Cover.
PWB-C Power Supply Board Swing down the Front Door. → Release and swing up the
Upper Half of the copier. → Remove the Rear Cover. →
Remove four screws that secure the Power Supply Unit
Cover.
PWB-D Noise Filter Board
PWB-E Motor Drive Board Open the Right Door. → Remove the Middle Right Cover.
→ Remove the Upper Right Cover. → Remove two screws
that secure the Right Cover.
PWB-F Fuse Board Remove two screws that secure the Lower Rear Cover.
PWB-H AE Sensor Board Remove the Original Scales. → Remove the Original Glass.
PWB-P Control Panel Swing down the Front Door. → Open the Right Door. →
Remove the Middle Right, Upper Right, and Right Covers.
→ Release and swing up the Upper Half of the copier. →
Remove the Upper Left Cover. → Remove two screws that
secure the control panel and loosen another five screws
that secure the control panel.
PWB-R RAM Board Swing down the Front Door. → Release and swing up the
Upper Half of the copier. → Remove three screws that
secure the Upper Rear Cover.
PU1 Power Supply Unit Open the Right Door. → Remove the Middle Right Cover.
→ Remove the Upper Right Cover. → Remove two screws
that secure the Right Cover.
PU2 DC Power Supply Unit Swing down the Front Door. → Release and swing up the
Upper Half of the copier. → Remove the Rear Cover. →
Remove four screws that secure the Power Supply Unit
Cover.
HV1 High Voltage Unit Swing down the Front Door. → Release and swing up the
Upper Half of the copier. → Remove one screw that
secures the High Voltage Unit.
UN2 Original Size Detecting
Board
Remove the Original Scales. → Remove the Original Glass.
UN3 ATDC Sensor Swing down the Front Door. → Release and swing up the
Upper Half of the copier. → Slide out the Imaging Unit. →
Remove two screws that secure the Synchronizing Roller
Guide Unit.
u Details of Readjustments/Resetting Involved In Replacement of PWB-R and UN2 UN3
•
When PWB-R is replaced:
Carry out Memory Clear and then make the Tech. Rep. Program, User’s Choice, and Adjust
settings again.
•
When UN2 is replaced:
Adjust of the Original Size Detecting Board.
•
When UN3 is replaced:
Discard the developer which had been used until UN3 was replaced, charge the Developing
Unit with fresh developer, and adjust ATDC.
D-9
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