Failure Detection; Service Tasks; At Parts Replacement; Maintenance - Canon D1300 Series Service Manual

2
Technical Overview > Fixing System > Service Tasks > Notes On Service Works

■ 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 notifies 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 specified degrees or higher for a
specified period of heater start-up during the wait period.
• If the detected temperature of the thermistor is kept a specified degrees or lower for a
specified 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 specified 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 specified degrees or lower for a
specified period under the heater temperature control.
3) Abnormal high temperature
• If the detected temperature of the main thermistor is kept a specified degrees or higher for
a specified period.
4) Drive circuit failure
• If a specified frequency of the FREQUENCY signal is not detected within a specified period
after the printer is turned on.
2 Technical Overview > Fixing System > Service Tasks > Notes On Service Works

Service Tasks

■ 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.
• Do not disassemble the Fixing Assembly at a field. It may cause a malfunction.
2-22
2-22