Toshiba e-studio 2555c, Service Manual

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e-STUDIO2555C/3055C/3555C/4555C/5055C © 2012-2013 TOSHIBA TEC CORPORATION All rights reserved
ERROR CODE AND TROUBLESHOOTING
8 - 190
[CE10] Image quality sensor abnormality (OFF level)
[CE20] Image quality sensor abnormality
31
<Checking the power supply> Check if any of the springs for
supplying power to the transfer belt
unit is deformed. Replace the spring if
it is deformed.
Classification Contents
Image control related service call Image quality sensor abnormality (OFF level): The output value
of this sensor is out of a specified range when sensor light
source is OFF.
Check Item Measure
Image quality sensor Connector check
LGC board • Connector check (CN366)
• Check the harnesses between the LGC board and the
image quality sensor.
• Check the harnesses between the LGC board and the
switching power supply.
Replacement part Measure
Switching power supply
Image quality sensor
LGC board
Classification Contents
Image control related service call Image quality sensor abnormality (no pattern level): The output
value of this sensor is out of a specified range when the image
quality control test pattern is not formed.
Step Check Item Result Measure
Next
Step
1
• Check the image quality sensor
detection value (05-2757).
• Is the value of 05-2757-0 "0",
and is the value of 05-2757-1
"255"?
Yes 9
No 2
2
• Is the transfer belt or the
transfer belt unit securely
installed?
• Are there any abnormal stains
(cleaning defects), large
scratches or breaking on the
transfer belt surface?
• Are the drum and the transfer
belt rotating smoothly?
• Is the transfer belt tight?
Yes 6
No 3
Step Check Item Result Measure
Next
Step