Service Works - Canon MF8580Cdw Service Manual

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Technical Overview > Fixing System > Service Works > Notes on service works
■ Failure detection
The DC controller determines failures of the fixing assembly under conditions below to stop
the fixing heater drive signal output (FSRD+, FSRD-) and shut off relay and power supply to
the heater. At the same time, it notifies the failure occurrence to the main controller.
1) Start-up failure detection
• The thermistor temperature does not exceed startup temperature 1 within the pre-defined
time after start-up of the heater from the waiting status.
• The thermistor temperature does not exceed startup temperature 2 within the pre-defined
time after reaching startup temperature 1 upon start-up of the heater from the waiting
status.
• The thermistor temperature does not reach the target temperature within the pre-defined
time after heater temperature control during initial rotation.
[Related error code]
E000-0000
2) Abnormally high temperature failure
• The thermistor temperature remains at pre-defined temperature or higher for the pre-
defined time.
[Related error code]
E001-0000 main thermistor
E001-0001 sub thermistor (MF8500 Series only)
3) Abnormally low temperature failure
• The thermistor temperature remains at pre-defined temperature or lower within the pre-
defined time after heater temperature control during printing.
[Related error code]
E003-0000 main thermistor
E003-0001 sub thermistor (MF8500 Series only)
4) Fixing heater drive circuit failure
• The zero-cross signal has not been detected for a certain times within the pre-defined time
after power-ON.
• ned time after power-ON.
• The zero-cross signal is detected after power-ON but has not been detected continuously
within the pre-defined time during printing.
[Related error code]
E004-0000
2 Technical Overview > Fixing System > Service Works > Notes on service works

Service Works

■ At parts replacement
No work is required for this product at parts replacement.
■ Maintenance
No periodically replaced parts, durable parts or periodical service is set for this product.
■ 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.
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