7823
C0501 error message at power up.
Solution
CAUSE: The machine was powered ON without the fusing unit installed.
SOLUTION: Install the fusing unit, then perform the following:
1. Remove the access panel from the left underside of the operations panel.
2. Hold S24 while powering the machine ON.
3. Release S24 and close the front door.
TAUS0610156EN00
Solution ID
2
Solution Usage
Description
Revision of gradation adjustment.
Solution
Perform Gradation Adjustment as outlined in 7823 Service Manual. It is crucial to reset PRT Highlight and PRT Max Density values to zero before each
adjustment is performed. After setting the values to zero, power OFF/ON the 7823 to allow the data to be completely written Compare to attached samples
of Gradation Chart and Image Processing Data Sheets to determine if calibration is properly completed.
Notes:
1. Use high quality paper of a Brightness Scale of 96 or better when performing the Gradation Adjustment. For optimal performance, the end user should
also use this type of paper.
2. While the 7823 Service Manual recommends performing the Gradation Adjustment three times to ensure stability, the Gradation Adjustment may need to
be done 8 to 10 times to properly stabilize.
See pages D-137 , S-17 and S-32 in the 7823 Service Manual for information on performing the Gradation Adjustment and resetting the PRT
Highlights/PRT Max Density to zero.
TAUS0610340EN00
Solution ID
2
Solution Usage
Description
Unable to print the Image or Mode lists from the List Output selection in the Service Mode Menu.
Solution
CAUSE: No 8.5x11R size paper is loaded in the Universal tray.
SOLUTION: To print Image or Mode lists, 8.5x11R paper MUST be loaded in the Universal tray.
TAUS0610456EN00
Solution ID
2
Solution Usage
Description
Streaks from lead-to-trail caused by loss of one or more colors.
Solution
CAUSE: Contamination of the doctor blade in the developing unit.
SOLUTION: Remove the developer and thoroughly clean the developing unit. Refer to page D-140 of the 7823 Technical Manual for the procedure used to
remove and adjust the doctor blade. Doctor blade-sleeve roller gap adjusting jigs (p/n 25TU00390) will be needed.
TAUS0610505EN00
Solution ID
2
Solution Usage
Description
ATDC adjustment just sits there, no codes.
Solution
CAUSE: Proper setup not completed.
SOLUTION: Verify procedure, including the Transfer Belt position. Perform the ATDC adjustment using the instructions outlined on pages D-131 to D-136 of
the 7823 Service Manual .
20
Copyright 2006, Konica Minolta Business Solutions U.S.A., Inc.
October 2006
(152 paginas)
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