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e-STUDIO281c/351c/451c
© 2005 - 2008 TOSHIBA TEC CORPORATION All rights reserved
TROUBLESHOOTING
5 - 88
[CE40] Image quality control test pattern abnormality
(1) Use "Image quality control abnormal detection counter Y to K display/0 clearing (08-573 to 576)"
to check the abnormal occurring condition for each color.
(2) Check “Output value display of image quality sensor / Low-density pattern (05-391-0 to 3)” to
check if the low-density pattern abnormality occurs for each color. The values under 320 for Y, M
and C, and under 220 for K are defined as low-density pattern abnormality.
(3) Check “Output value display of image quality sensor / High-density pattern (05-390-0 to 3)” to
check if the high-density pattern abnormality occurs for each color and identify the color which
pattern is abnormal. If the value is 630 or above, it is defined as high-density pattern abnormality.
(4) Set the values of “Image quality closed-loop control / Contrast voltage (08-556)” and “Image
quality closed-loop control / Laser power (08-557)” to “0” (Invalid).
(5) Perform “Enforced performing of image quality open-loop control (05-394)”.
(6) Output the image quality control test pattern (04-270) more than one time and check the patch of
the color identified in step (3) to see if the image is abnormal (Note).
(7) Replace the image quality sensor.
(8) Set the values of “Image quality closed-loop control / Contrast voltage (08-556)” and “Image
quality closed-loop control / Laser power (08-557)” to “1” (Valid).
(9) Perform “Enforced performing of image quality open-loop control (05-394)” and make sure it is
completed normally. (Error [CE40] does not appear.) Then perform “Automatic gamma adjust-
ment“ ( Chapter 3.5.1 and 3.6.1).
(10) Clear all "Image quality control abnormal detection counter Y to K display/0 clearing (08-573 to
576)".
Note:
Note:
Abnormal image:
Blank print, Solid print, White banding, Color banding, White spots, Poor transfer, Uneven image
density, Faded image (low density), Uneven light distribution, Blotched image.
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320 or above (Y, M and C)
220 or above (K)
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Under 320 (Y, M and C)
Under 220 (K)
Low-density pattern abnormality
Check the transfer belt. If the cleaning is poor, correct the
transfer belt around its cleaning blade.
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To (9)
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Normal
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Abnormal
Correct the items related to the image.
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To (9)
Содержание e-studio281c
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Страница 406: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved PREVENTIVE MAINTENANCE PM 4 38 ...
Страница 618: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved FIRMWARE UPDATING 6 60 ...
Страница 672: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved DATA CLONING with USB STORAGE DEVICE 9 26 ...
Страница 674: ...e STUDIO281c 351c 451c 2005 2008 TOSHIBA TEC CORPORATION All rights reserved WIRE HARNESS CONNECTION DIAGRAMS 10 2 ...
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