Power Supply - Canon LBP-3260 Service Manual

D. Power Supply
1. Outline

Power supply

Circuit
breaker
Power
switch
(S101)
Current
fuse
Rectificat
ion circuit
Noise
filter
Converter
Rush curren
prevention
circuit
Switching
FET
Filter
circuit
Switching
FET
Transformer
Control
IC
AC power is supplied to the low-voltage power supply when the main switch (S101) is turned
ON. The low-voltage power supply generates the required +24VDC, +5VDC and +3.3VDC for the
printer. +24VDC is supplied to the DC controller from the low-voltage power supply when the
DC controller sets the REMOTE 24V signal (/REMT24) to "L."
+24VDC is supplied to the high-voltage power supply PCB, +5VDC main motor, scanner motor,
and fans. +5VDC is used for sensors and ICs on the DC controller PCB.
+24VDC is divided into +24VA which is normally supplied from the power supply and +24VB
which is shut OFF when the door switch (SW1401) is turned OFF by opening the top cover or
To fixing roller heater
Noise
filter
Current
transfor
-mer
Inverter control
circuit
Relay
Phototriac
Rectificat
coupler
ion circuit
Over-current
detection circuit
t
Switching
Rectificat
ion filter
Transformer
circuit
Switching
FET
+5V control Current
photocoupler and
voltage
detection
circuit
Abnormal
voltage latch
photocoupler
Low-voltage power supply circuit
Figure 2-2-11
Triac
Phototriac
Triac
coupler
Phototriac
FSRTH
coupler
Safety
RLD
circuit
/FSRD1
/FSRD2
/FSRDE
/FSRCT
SUPSLT
Phototriac
coupler
/RLDSNS
Heater
TSWIN
drive
TSWOUT
circuit
+24V
Filter
circuit
FET
/REMT24
+5V
+3.3V
Filter
circuit
CHAPTER 2
DC controller
+3.3V
Video
+5V
controller PCB
+5V
Laser driver
+5V
BD PCB
+5V
Sensors
Operation
+5V
panel
Scanner
+24VA
motor
+24VB
High-voltage
power supply
+24VA Solenoids
Clutches
+24VB
Main motor
Switch
/sensor
PCB
Door
switch
(SW1401)
+24VB
+24VA
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