HP LaserJet Enterprise M552 - Fuser control functions; Fuser temperature control

Table 1-11 Fuser components (continued)
Type of component Abbreviation Name Function
TH3 Sub-thermistor 2 Detects the temperature at one end
of the fuser heater
Thermoswitch
(Non-contact type)
TP1 Thermoswitch Prevents an abnormal temperature
rise in the fuser heater
Fuser control functions
The printer has the following fuser control functions.
Table 1-12 Low-voltage power supply functions
Failure detection function Supported feature
Fuser temperature control Yes
Fuser failure detection Yes
Frequency detection circuit failure detection Yes
Fuser pressure release mechanism failure detection Yes
Fuser type discrepancy detection Yes
Fuser type identication detection Yes
Fuser presence detection Yes
Fuser life detection Yes
Relay failure detection No
Pressure roller cleaning Yes
Fuser temperature control
The temperatures of the two rollers in the fuser uctuate according to the stage of the printing process. The
DC controller sends commands to the fuser-control circuit to adjust temperatures.
24 Chapter 1 Theory of operation ENWW