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Diagnostic Information 2-43
5016-001
B 990 Service Engine Error - Motor turns.
Note: Observe the coupling operation as the printer is performing
the self test and the engine is warming up. Determine when the
failure occurs.
FRU Action
1 Motor Mounting
Stay A
Assembly
Coupling parts
Check the parts associated with the coupling
operation for signs of excessive wear, breakage or
looseness. Check the coupling arm, coupling shaft
and cam.
• If a problem exists, repair or replace the
complete motor mounting stay A assembly.
• If no problem is found with the stay A assembly,
check the detent arm, detent spring, coupling
arm and coupling shaft for signs of binding,
wear, breakage or looseness. Repair as
necessary.