Toshiba e-STUDIO2820C Service Handbook page 357

< Checking with test pattern >
(23) Turn the power ON while [0] and [4] are pressed simultaneously.
(24) Key in "220", then press the [START] button.
(25) Select "C", "M", "Y" or "K", then press the [START] button.
(26) Press the [CLEAR] button after one sheet of test pattern has been exited.
(27) Check if the printed image of the test pattern in each color contains difference in density on its
front, center and rear sides, or if there is any image trouble in a whole image.
Is the test pattern printed in blank?
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Abnormal
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Normal
Is the image of the test pattern printed normally without any difference in density on its front
and rear sides?
| NO
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YES
Is the image printed normally without yellow, magenta, cyan or black streaks in the secondary
scanning direction?
NO
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YES
Is the image printed normally without white streaks in the secondary scanning direction?
| NO
YES
Is a certain color in the printed image turned to black solid?
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Check if the laser shutter is operating normally.
< Checking procedure for the laser shutter opening/closing status >
1. Take off the developer unit so that the laser shutter can be seen.
* Clean around the laser shutter if the toner or developer material is
spilled over.
2. Turn the power ON while [0] and [3] are pressed simultaneously.
3. Key in "417". (03-417: Laser shutter opening/closing status)
4. Press the [START] button repeatedly to open and close the shutter
alternatively.
If the laser shutter is not opening or closing normally, check the shutter
and correct it if necessary.
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Proceed to step (23).
1. Check the contacting status of the transfer belt and the photoconduc-
tive drum.
2. Check the amount of the developer material. (Check if the developer
material is supplied on the developer sleeve.)
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Check if the main charger wire corresponding to the color of the streaks is
stained.
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Check if the slit glass of the laser optical unit is stained.
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e-STUDIO2820C/2830C/3520C/3530C/4520C
ERROR CODE AND TROUBLESHOOTING
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