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June 30, 1998
SC370-07: Potential sensor error 7
Definition- [D]
When adjusting the drum potential (V
setting, the drum potential sensor detects that V
even though the LD power has been changed twenty times.
- Possible causes -
• Potential sensor defective
• Poor connection between the potential sensor and the I/O board (IOB)
• IOB defective
• Poor connection between the drum unit and the I/O board (IOB)
• LD unit defective
• Poor drum cleaning
SC390-1: TD sensor error 1
-Definition- [B]
The TD sensor output voltage is less than 0.5V or more than 4.0V 10 times
consecutively during copying.
- Possible causes -
• TD sensor defective
• Poor connection between the TD sensor and the I/O board (IOB)
• I/O board (IOB) defective
SC390-2: TD sensor error 2
-Definition- [B]
One of the following TD sensor output voltages is detected during TD sensor
initial setting.
1) Less than 2.5V when the maximum PWM (255) is applied to the TD sensor.
2) 2.5V or more when minimum PWM (0) is applied to the TD sensor.
- Possible causes -
• TD sensor defective
• Poor connection between the TD sensor and the I/O board (IOB)
• I/O board (IOB) defective
SERVICE CALL CONDITIONS
) for half tone at the process control initial
H
does not become –300 + 20 V
H
7-11
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