Power saving
The Sleep Delay feature reduces power consumption when the product has been inactive for an extended
period. You can set the length of time before the product enters sleep mode. See Sleep Delay on page 4.
The Auto Power Down feature turns the product off after a certain length of time. You can adjust this time
setting.
Fuser control
The power supply unit controls the temperature in the fuser unit. The product uses an on-demand fusing
method.
Figure 1-5 Fuser block diagram
The fuser is composed of the following components.
●
Heater (100V model: H120—200V model: H220): Heats the fuser sleeve
●
Thermistors
◦
Main thermistor (TH801): Detects the center temperature of the fuser heater (contact type)
◦
Sub thermistor 1 (TH802): Detects the right side temperature of the fuser heater (contact type)
◦
Sub thermistor 2 (TH803): Detects the left side temperature of the fuser heater (contact type)
●
Thermal fuse (FU1): Prevents an abnormal temperature rise of the fuser heater
These fuser temperature controls are performed by the fuser control circuit and the fuser heater safety
circuit, which receive commands from the DC controller.
10 Chapter 1 Theory of operation ENWW
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