HP LaserJet Pro M402d - Page 32

Fuser control functions
Figure 1-7 Fuser control
Fuser heater
safety circuit
FREQSNS
TP1
Fuser heater (H1)
Fuser film ass’y
TP1: Thermal switch
TH1: Thermistor
Fuser
Pressure roller
FSRD
RLYD
FSRTH
+24V
Low-voltage suppry supply
Fuser control
RL101
DC controlle
r
Fuser heater
control circuit
Relay control
circuit
Current detection
circuit
TH1
The printer has the following fuser control functions.
Table
1-8 Fuser control functions
Failure detection function Supported feature
Fuser temperature control Yes
14 Chapter 1 Theory of operation ENWW