4-54 Printer Service Manual
5057-XXX
Warning: Ensure that the harness coupler (B) is removed from the old developer unit assembly (A) and installed
on the new one.
Note: Installation of a new developer requires installation of the appropriate carrier. See page 4-60 for the
instructions on how to install the new carrier.
Replacement warning: Ensure that the rear area new developer unit assembly (A) is properly engaged into the
machine or the magnetic rolls will not turn properly.
Use the following procedure to test for proper magnetic roll engagement immediately after installing the new C, M or Y
developer unit assembly (A):
A. Enter the diagnostic mode.
B. Select MOTOR TESTS
C. Select Finisher Motor Tests
D. Select CMY developer drive motor (this test will not work for the K developer unit assembly)
Warning: If the magnetic roll and the waste auger can be seen turning then the developer unit assembly (A) is
installed correctly, if the magnetic roll and the waste auger are not turning, then the developer unit assembly (A)
must be reinstalled and the motor test repeated.
Replacement warning: When replacing the developer interlock plate assembly, ensure that the erase lamp
harnesses and developer unit assembly harnesses are correctly installed in the clamps, or they may become
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