Toshiba e-STUDIO2330C Service Handbook page 371

(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 628 or above, it is defined as high-density pattern abnormality.
| Under 628 (Y, M, C and K)
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(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 the list print
([9][START]) in the adjustment mode (05), and check the patch of the color identified in step (1)
to see if the image is abnormal.
| Normal
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(7) Replace the image quality sensor or LGC board.
(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 "Automatic initialization of image quality control (05-396)" and make sure it is completed
normally. (Error [CE40] does not appear.) Then perform "Automatic gamma adjustment" (
Chapter 3.7.1 and 3.8.1).
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| 628 or above (Y, M, C and K)
High-density pattern abnormality
• Check if the laser shutter is working properly.
<Procedure>
1. Take off the developer unit so that the laser shutter
can be easily seen.
* Clean around the laser shutter if the developer has
been spilled over.
2. While pressing the digital keys [0] and [3]
simultaneously, turn the power ON.
3. Key in "417".
4. Press the [START] button repeatedly to open and
close the shutter alternatively.
- If the laser shutter does not open/close, check
the shutter and correct it if necessary.
• Check if the developer unit has been installed properly.
1. Visually check the installation status of the developer
unit, and correct it if there is any abnormality.
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To (9)
(If you have already performed this checking cycle once,
proceed to step (4).)
Abnormal
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.
* Blank print: including when one of the YMCK colors is not printed.
Correct the abnormal image.
Proceed to step (8).
| When an error occurs:
Check and correct it accordingly.
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e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
ERROR CODE AND TROUBLESHOOTING
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