Toshiba e-STUDIO5540C Service Manual page 160

Step Check item
29 Check the following items if
the image position aligning
sensors are not operating
normally:
< Checking with test pattern >
30
31
32
33
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Result
Normal Is the connector CN307 on the LGC board
disconnected?
Is the connector of the image position aligning
sensor disconnected?
Is the harness between the LGC board and the
image position aligning sensor broken?
Is the light emitting or receiving area of the
image position aligning sensor stained with
toner?
Are the sensor shutter and the image quality
sensor opening or closing normally? Or are
they
damaged?
Is the light emitting area of the image position
aligning sensor emitting LEDs?
< Checking procedure for the sensor shutter
opening/closing status >
1. Take off the transfer belt unit so that the
sensor unit can be seen.
2. Turn the power ON while [0] and [3] are
pressed simultaneously.
3. The shutter should be opened when "118" is
keyed in. It should be closed when "168" is
keyed in.
< Checking procedure for the LED emission of
the image position aligning sensor >
1. Key in "118" to open the sensor shutter.
2. The light emitting area of the sensor should
emit LEDs when "117" is keyed in.
Abnorm 1. Reconnect the connector.
al 2. Replace the harness.
3. Clean the light emitting and receiving areas
of the image position aligning sensor.
4. 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 "220", then press the [START] button.
Select "C", "M", "Y" or "K", then press the
[START] button.
Press the [CLEAR] button after one sheet of
test pattern has been exited.
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Measures
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
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