Action Yes No
Step 5
Replace the motor (developer). See
“Motor (developer) removal” on
page 368.
Does the problem remain?
Go to step 6. The problem is solved.
Step 6
Check the developer for proper operation.
Is it working properly?
Go to step 9. Go to step 7.
Step 7
Make sure that the cable is properly connected to the developer and the
image controller board.
Does the problem remain?
Go to step 8. The problem is solved.
Step 8
Check the developer for damage, and replace if necessary. See
“Developer
unit removal” on page 336.
Does the problem remain?
Go to step 9. The problem is solved.
Step 9
Check the engine controller board pins for damage, and replace if
necessary. See
“Engine controller board removal” on page 353.
Does the problem remain?
Contact the next level
of support.
The problem is solved.
153 errors
153 error messages
Error code Description Action
153.00 The motor (transport) failed. See
“Motor (transport) failure service check” on
page 157.
153.06 The motor (transport) did not run at the correct
timing.
7421
Diagnostic information
156
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