Canon LBP 2460 - B/W Laser Printer, Руководство по обслуживанию

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3) Reports the fixing unit failure to the video controller.
4. Fixing roller heater start sequence
The sequence of operations from the power ON to the standby is as follows:
1) The CPU outputs the fixing sub heater drive signal and then the fixing main heater drive
signal to prevent the surge current from increasing after the power is turned ON.
2) If the upper fixing roller temperature reaches 169 to 177°C (180°C for temperature
adjustment in the morning), the CPU outputs the READY signal (/RDY) to the video
controller. If this temperature is not reached within 180 seconds after the fixing roller heater
turns on, the CPU assumes that a fixing unit failure has occurred.
3) After the /RDY signal is output, the CPU keeps the upper fixing roller temperature at 169 to
177°C until the PRINT signal (/PRNT) is sent from the video controller.
Figure 2-2-10
CHAPTER 2
2 - 15
230
150
169
180
177
temperature (
°
C) Abnormally high
temperature-detection
temperature
Normal print temperature
Standby
temperature
Abnormally low
temperature-detection
temperature
Last rotation
start
/PRNT signal
ON
/RDY signal
ON
Power ON
Upper fixing roller
Time (sec)