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SERVICE CALL CONDITIONS
SC390-3: TD sensor error 3
-Definition- [B]
The TD sensor output voltage is not adjusted to 2.5 + 0.1V within 20 s during TD
sensor initial setting.
- Possible causes -
• TD sensor defective
• Poor connection between the TD sensor and the I/O board (IOB)
• I/O board (IOB) defective
SC391: Development bias leak
-Definition- [B]
A development bias leak signal is detected.
- Possible causes -
• Poor connection between the development bias terminal and the
development P.P.
• Development P.P. defective
SC401-1: Transfer roller leak error
-Definition- [B]
A transfer roller current leak signal is detected.
- Possible causes -
• Transfer P.P. defective
• Poor connection between the transfer current terminal and the transfer P.P.
SC401-2: Transfer roller open error
-Definition- [B]
The transfer roller current feedback signal is not detected.
- Possible causes -
• Transfer P.P. defective
• Poor connection between the transfer current terminal and the transfer P.P.
SC430: Quenching lamp error
-Definition- [D]
When finishing the process control initial setting, the drum potential which is
detected by the drum potential sensor is out of the normal range.
- Possible causes -
• Quenching lamp defective
• Poor connection between quenching lamp and charge power pack
7-12
June 30, 1998
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