Covers and Boards
C274 4-12 SM
4.4.3 MPU
Remove the rear cover ( Rear Cover)
[A]: MPU (x 8, x 8)
Check the dip switch settings on the old MPU and make the dip switch settings [B]
the same on the new MPU.
Adjust the master end sensor after installing the new MPU. ( Master Feed -
Master End Sensor Adjustment)
Adjust the ink detection after installing the new MPU. ( Drum - Ink Detection
Adjustment)
Ensure that the EPROM on the MPU contains the correct firmware.
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