Canon MF5940dw - Failure Detection; Service Tasks; At Parts Replacement; Maintenance

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Technical Overview > Fixing System > Service Tasks > Notes On Service Works
Technical Overview > Fixing System > Service Tasks > Notes On Service Works
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Failure Detection
The DC Controller determines a Fixing Assembly failure, makes the FIXING HEATER
CONTROL signal inactive, releases the relay to interrupt power supply to the Fixing Heater
and noties the formatter of a failure state when it encounters the following conditions:
1) Start-up failure
• 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 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 low temperature
• 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.
3) Abnormal high temperature
• If the detected temperature of the main thermistor is kept a specied degrees or higher for
a specied period.
4) Drive circuit failure
• If a specied frequency of the FREQUENCY signal is not detected within a specied period
after the printer is turned on.
Service Tasks
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At Parts Replacement
No work is required for this product at parts replacement.
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Maintenance
No periodically replaced parts, durable parts or periodical service is set for this product.
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Notes On Service Works
• When removing the Fixing Assembly, perform the operation after the Fixing Assembly is
surely cooled. The Fixing Assembly just after printing may cause burn injury.
• Do not disassemble the Fixing Assembly at a eld. It may cause a malfunction.