Image Quality Sensor Abnormality - Toshiba e-STUDIO2330C Service Handbook

[CE20] Image quality sensor abnormality
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?
| NO
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YES
Is the sensor shutter of the image quality sensor opening or closing normally? Or is it
damaged?
Is the sensor surface of the image quality sensor stained with toner? If so, has it been
cleaned?
NO
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YES
Is the connector of the image quality sensor securely connected?
Is the connector CN337 on the LGC board securely connected?
Is the harness between the LGC board and the image quality sensor disconnected?
NO
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YES
Is +12V power supply voltage normally supplied to the image quality sensor?
Is +12V voltage normally output by the CN345-7pin on the LGC board?
| NO
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YES
e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
ERROR CODE AND TROUBLESHOOTING
<Checking procedure>
1. Check if the transfer belt unit is securely installed. Correct it if not.
2. Check if any toner image remains on the transfer belt surface.
If any, check the installation status of the TBU cleaner unit. If there is any
abnormality, correct it, and clean the transfer belt.
3. Check if the drum and the transfer belt are properly operated.
(ON: 03-101 / OFF: 03-151)
If they are not rotating normally, check if their drive gears are damaged or if
they contact the equipment. Correct it if needed.
Proceed to step (6). (to step (1) for the second time)
<Checking procedure>
1. Take off the transfer belt unit so that you can see the sensor unit.
2. Check if the sensor shutter is opening or closing normally.
(Opening: 03-125 / Closing: 03-175)
If the sensor shutter is not opening or closing, check if it is damaged or
there is any abnormality in the sensor shutter solenoid.
Check the connector and the harness between the sensor shutter solenoid
and the LGC board. (LGC CN337-8pin, 9pin)
3. Slide the sensor shutter so that the sensor surface can be seen.
4. Clean the sensor surface with a cotton swab or a soft cloth.
5. Clean the area around the sensor (e.g.: sensor shutter) if it is stained, so
that the sensor surface does not become dirty.
Proceed to step (6). (to step (1) for the second time)
<Checking procedure>
• Reconnect the connector.
• Replace the harness.
Proceed to step (6). (to step (1) for the second time)
<Checking procedure>
1. Check if +12V voltage is output by the switching power supply (PS-ACC
CN404-7pin).
2. Check if +12V voltage is output by the CN345-7pin on the LGC board.
Check if the supply harness between the switching power supply and the
LGC board is open circuited, damaged or disconnected.
Proceed to step (6). (to step (1) for the second time)
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