Toshiba e-STUDIO556 Service Manual page 669

Replace the finisher controller PC board.
Replace the punch driver PC board.
[CB90] Paper pushing plate motor abnormality
[Procedure 1]
Is the paper pushing plate home position sensor (PI14S) working normally?
NO 

YES
Is the paper pushing plate motor (M8S) operating at the fixed timing?
YES  Replace the saddle stitcher controller PC board.

NO
Is the paper pushing plate drive mechanism normal?
NO 

YES
Is the problem solved by replacing the paper pushing plate motor (M8S)?
NO 

YES
END
[Procedure 2]
Is the paper pushing plate top position sensor (PI15S) working normally?
NO 

YES
Is the paper pushing plate motor (M8S) operating at the fixed timing?
YES  Replace the saddle stitcher controller PC board.

NO
Is there any problem with the paper pushing plate drive mechanism?
YES  Fix the mechanism.

NO
Is the problem solved by replacing the paper pushing plate motor (M8S)?
NO 

YES
END
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Replace the sensor.
Fix the mechanism.
Replace the saddle stitcher controller PC board.
Replace the sensor.
Replace the saddle stitcher controller PC board.
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e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
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