HP CP4525DN Laser CC494A#ABA manual Fuser control, 9Fuser components

Fuser control

The fuser heater-control circuit and the fuser heater safety circuit control the fuser temperature according to commands from the DC controller.

Figure 1-6Fuser components

TH3	Pressure roller
TP1
		Low-voltage power
TH1		supply unit
H1
TH2		Fuser heater
	FUSER HEATER	control circuit
	CONTROL signal
FUSER TEMPERATURE signal

Fuser sleeve

DC controller

Fuser heater safety circuit

Table 1-9Fuser components

Type of component	Abbreviation	Name	Function
Heaters	H1	Fuser heater	Heats the fuser sleeve.
Thermistors	TH1	Main thermistor	Detects the center temperature of
(Contact type)			the fuser sleeve.
	TH2	Sub thermistor 1	Detects the temperature at one
			end of the fuser heater.
	TH3	Sub thermistor 2
Thermoswitches	TP1	For the fuser heater	Controls the fuser-roller main
(Contact type)			heater

14 Chapter 1 Theory of operation ENWW