Toshiba e-STUDIO 2555C Service Manual page 743

Step Check Item
Image position aligning sensor
12
Are the sensor shutters of the
image position aligning sensor
opening or closing normally? Are
they normal without any damage?
1. Take off the transfer belt unit so
that the sensor unit can be
seen.
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2. Turn the power ON while [0]
and [3] are pressed
simultaneously.
3. The shutter should be opened
when "125" is keyed in. It
should be closed when "175" is
keyed in.
Is the light emitting area of the
image position aligning sensor
emitting LEDs?
1. Key in "125" to open the sensor
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shutter.
2. The light emitting area of the
sensor should emit LEDs when
"126" is keyed in.
Image position aligning sensor
15
< Checking with test pattern >
16
Is the image of the test pattern
printed normally without any
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difference in density on its front
and rear sides?
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Result Measure
• Check the connectors and
harnesses (J673, J781) between
the image position aligning sensor
and the LGC board (CN366).
• Check if the light emitting or
receiving area of the image position
aligning sensor stained with toner.
Yes
No
Yes
No
• Connector and harness check
• Clean the light emitting and
receiving areas of the image
position aligning sensor.
• If the sensor shutter is damaged,
replace it.
• If the sensor shutter solenoid is not
operating normally, replace the
solenoid.
• Turn the power ON while [0] and [4]
are pressed simultaneously.
• Key in "286", then press the
[START] button.
• Press the [CLEAR] button after one
sheet of test pattern has been
exited.
• 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.
Yes
No
e-STUDIO2555C/3055C/3555C/4555C/5055C
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ERROR CODE AND TROUBLESHOOTING
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