Toshiba e-STUDIO556 Service Manual page 721

Multifunctional digital systems

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<<Procedure of the "enforced performing of image quality control"/"control status check">>

Set the value for the number of times of sensor abnormality (08-2873) to "0".

Set the value for the Image quality closed-loop control (08-2844-0), (08-2844-1) to "0"

Perform the "enforced performing of image quality control" (05-2120).

Check the control status of the image quality control (05-2133) and number of times of

sensor abnormality (08-2873).

Are both values for 05-2133 and 08-2873 "0"?

Perform the test print (04-114: Secondary scanning direction 33 gradation steps). Is the

image printed properly?

See " Troubleshooting for the Image" and clear the problem.

Is the value for 05-2133 "1"?

Attempt the procedure again from the beginning.

Is the value for 05-2133 "2"?

Pattern abnormality. Go back to "(1) Pattern abnormality " and clear the problem.

Is the value for 05-2133 "4"?

Sensor abnormality. Go back to "(2) Sensor abnormality" and clear the problem.

* When the value for 05-2160 (Drum surface potential sensor control status) is other than

"0", there is a problem on the drum surface potential control. Clear the problem with the

troubleshooting for surface potential control related.

e-STUDIO556/656/756/856(Ver03)

ERROR CODE AND TROUBLESHOOTING

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