2F3/2F4
2-3-1
2-3 Operation of the PWBs
2-3-1 Power supply PWB
Figure 2-3-1 Power supply PWB block diagram
FET
(Q1)
(Q2)
Switching control
circuit (IC1)
Zero cross
signal
generation
circuit
Power
switch
Current
fuse
Noise
filter
circuit
Transformer
(T1)
+5V1
+3.3V1
Triac
(TRA1)
Triac
(TRA2)
ZCROSS
TH1
TH2
EXITPAPN
FUDR
FDDR
HEAT1DR
HEAT2DR
+24V1
GND
GND
AC
input
Rectifier
circuit
5 V DC
rectifier/
smoothing
circuit
Power supply PWB
Engine
controller
PWB
Fuser
thermostat 1
Fuser
thermostat 2*
Fuser
thermistor 1
Fuser
thermistor 2*
Exit sensor
Fuser PWB
Face up/down
solenoid
Fuser
heater
lamp 1
Fuser
heater
lamp 2*
+
24 V DC
rectifier/
smoothing
circuit
Photo-
coupler
(PC4)
Photo-
coupler
(PC5)
Photo-
coupler
(PC3)
Photo-
coupler
(PC1)
Photo-
coupler
(PC2)
*: 16 ppm printer only.
Over
voltage/
current
detection
circuit
DC-DC
coverter
circuit
Содержание C5020N - FS Color LED Printer
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