Utax LP 3335 - 2-3 Operation of the PWBs; 2-3-1 Power Source PWB

2L0
2-3-1
2-3 Operati on of the PWBs
2-3-1 Power source PWB
Figure 2-3-1 Power source PWB block diagram
+24V1
SLEEP
+24V1
+24V2
FAN
+3.3V2
ZCROSS
HEATN
THERM
Power source PWB
Left
cooling
fan motor
Fuser thermistor
Fuser thermal cutout
Fuser unit
Switching
regulator
circuit
Zero cross
signal circuit
A
C input
Interlock
switch
Power switch
Fuser heater
lamp control
circuit
Fuser
heater lamp