Canon LBP6670dn Series - Failure Detection

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Technology > Fixing System > Fixing control circuit > Failure detection
Technology > Fixing System > Fixing control circuit > Failure detection
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Failure detection
The DC controller determines a xing unit failure, makes the FIXING HEATER CONTROL
signal inactive, releases the relay to interrupt power supply to the xing heater and noties
the Main Controller of a failure state when it encounters the following conditions:
1) Start-up failure (E000)
• If the detected temperature of the thermistor is kept a specied degrees or higher for a
specied period of heater start-up during the wait period.
• If the detected temperature of the thermistor is kept a specied degrees or lower for a
specied period under the heater temperature control during the initial rotation period.
• If the detected temperature of the thermistor is kept a specied degrees or lower for a
specied period under the heater temperature control during the print period.
• If the detected temperature of the thermistor does not reach its targeted temperature within
a specied period under the heater temperature control during the initial rotation period.
2) Abnormal high temperature (E001)
• If the detected temperature of the main thermistor is kept a specied degrees or higher for
a specied period.
3) Abnormal low temperature (E003)
• If the detected temperature of the thermistor is kept a specied degrees or lower for a
specied period under the heater temperature control.
4) Drive circuit failure (E004)
• If a specied frequency of the FREQUENCY signal is not detected within a specied period
after the printer is turned on.
• If an out of specied frequency of the FREQUENCY signal is detected after the printer is
turned on and the signal is once detected.