Toshiba e-STUDIO 5540C Service Manual page 918

Step Check item
34 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.
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Result
Is the test pattern printed in blank?
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 "201". (03-201: Laser shutter
opening/closing status)
4. Press the [START] button and check if the
shutter is opened and then closed
(reciprocating 1cycle).
Abnormal: If the laser shutter is not opening or
closing normally, check the shutter and correct
it if necessary.
Normal: Is the image of the test pattern printed
normally without any difference in density on its
front, center and rear sides?
NO:1. Check the contacting status of the
transfer belt and the photoconductive drum.
2. Check the amount of the developer material.
(Check if the developer material is supplied on
the developer sleeve.)
Is the image printed normally without yellow,
magenta, cyan or black streaks in the
secondary scanning direction?
Check if the main charger wire corresponding
to the color of the streaks is stained.
Is the image printed normally without white
streaks in the secondary scanning direction?
Check if the slit glass of the laser optical unit is
stained.
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